WO2021135587A1 - Projection device and projection interaction method - Google Patents

Projection device and projection interaction method Download PDF

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Publication number
WO2021135587A1
WO2021135587A1 PCT/CN2020/124779 CN2020124779W WO2021135587A1 WO 2021135587 A1 WO2021135587 A1 WO 2021135587A1 CN 2020124779 W CN2020124779 W CN 2020124779W WO 2021135587 A1 WO2021135587 A1 WO 2021135587A1
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WO
WIPO (PCT)
Prior art keywords
light
wavelength
polarized
polarization
beam splitter
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PCT/CN2020/124779
Other languages
French (fr)
Chinese (zh)
Inventor
赵飞
谢振霖
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华为技术有限公司
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Publication date
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Publication of WO2021135587A1 publication Critical patent/WO2021135587A1/en

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2073—Polarisers in the lamp house
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/18—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical projection, e.g. combination of mirror and condenser and objective
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2066—Reflectors in illumination beam
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3167—Modulator illumination systems for polarizing the light beam

Definitions

  • This application relates to the field of electronic devices, and more specifically, to a projection device and a projection interaction method.
  • speakers can use projection equipment to display images or videos, so that viewers can understand what the speaker is expressing.
  • the projection device can be used to display the image of the historical figure, so that the viewer can understand the character image described by the speaker at a glance.
  • the vividness of the speaker's expression can be enhanced.
  • This application provides a projection device and a projection interaction method.
  • a projection device including: a first light processor, an imaging lens, a first polarization beam splitter, a first polarization beam splitter, a first light valve, an image sensor, and an image processor;
  • the first light processor emits the first polarized visible light including the image information of the projected image;
  • the first side of the first polarization beam splitter reflects the first polarized visible light from the first light processor, and the The first polarized visible light reflected on one side vertically enters the first light valve;
  • the first light valve collects the first polarized visible light reflected by the first side, and the first light valve changes the incident first polarized light
  • the visible light is converted into a second polarized visible light, the first light valve vertically emits the second polarized visible light converted by the first light valve, and the second polarized visible light emitted by the first light valve transmits the first polarization splitter
  • the polarization direction of the first polarized visible light is perpendicular to the polarization direction of the
  • the wavelength of the first polarized visible light may be, for example, 380 nm to 780 nm.
  • the first polarization beam splitter is used to reflect the first polarized light and transmit the second polarized light.
  • the first polarized light may be S-polarized light or P-polarized light, for example.
  • S-polarized light can mean that the polarization direction of the light is perpendicular to the incident surface.
  • P-polarized light can mean that the polarization direction of the light is parallel to the incident surface.
  • the first polarized visible light incident on the first polarizing beam splitter may be parallel to the first light valve; the first polarized visible light from the first light processor is incident on the first polarizing beam splitter at an incident angle of 45°, and The 45° exit angle emits the first polarization beam splitter.
  • the first light valve may be, for example, a liquid crystal on silicon (LCoS) chip, a digital micromirror device (DMD), or the like.
  • LCD liquid crystal on silicon
  • DMD digital micromirror device
  • the projection area of the projection device can be a part of objects such as vertical walls, horizontal roofs, desktops, ground, and curtains.
  • the imaging lens of the projection device can be arranged in parallel or perpendicular to the projection area.
  • the projection image projected in the projection area may be a projection image stored by a projection device, or a projection image sent by an electronic device received by the projection device.
  • the electronic device can be, for example, a mobile phone, a server, a watch, a router, a tablet computer, an e-reader, a notebook computer, a digital camera, or a wearable device.
  • the light emitted by the first light valve passes through the imaging lens of the projection device and is projected in the projection area.
  • Infrared light passes through the imaging lens and irradiates the image sensor. Therefore, both the first light valve and the image sensor satisfy the object-image conjugate relationship with the projection area. According to the image collected by the first light valve and the image collected by the image sensor, the user's indicated position on the projected image can be determined.
  • the position indicated by the user on the projection image may be the projection position of the infrared light emitted by the infrared remote control on the projection area.
  • the user's indicated position on the projected image may also be the position indicated by the finger (or the end of the hand-held rod away from the hand) on the projection area.
  • the position indicated by the user on the projected image may also be the position indicated on the projection area by the infrared light source on the hand-held rod.
  • the infrared light from the projection area is reflected to the image sensor through the first polarization beam splitter, so the projection device can use the collected infrared light to perceive the user's operation in the projection area. Therefore, the projection device provided by the present application can provide users with more control functions and can be used in more presentation occasions.
  • the first polarization beam splitter includes an infrared reflective layer for reflecting infrared light.
  • the first polarization beam splitter may include a polarization beam splitting layer for reflecting the first polarized light and transmitting the second polarized light.
  • an infrared reflective layer is provided on the first polarization beam splitter, so that the first polarization beam splitter can have the ability to reflect infrared light.
  • the number of components in the projection device may not be additionally increased, so that the structure of the projection device is more compact.
  • the infrared reflective layer is located on the second side.
  • an infrared reflective layer is provided on the second side of the first polarizing beam splitter, which can reduce the amount of infrared light reflected on the first side of the first polarizing beam splitter, thereby reducing visible light and infrared light in the first polarized light.
  • the deviation caused by the reflection on the beam splitter enables the projection device to accurately know the position indicated by the user on the projected image.
  • the first polarization beam splitter is used to reflect a first polarized light and to transmit a second polarized light, and the first polarized light includes the first polarized light. Visible light, the second polarized light includes the second polarized visible light, and the polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light; the projection device further includes: a first infrared polarization converter Wherein, the first infrared polarization converter converts the infrared light from the imaging lens into first polarized infrared light, and the infrared light from the imaging lens passes through the first infrared polarization converter And incident on the second side of the first polarization beam splitter, the first polarized infrared light belongs to the first polarized light.
  • the polarization direction of infrared light can be changed, so that the function of reflecting infrared light can be realized when the first polarization beam splitter itself does not have the ability to reflect infrared light.
  • the projection device selects a relatively traditional polarization beam splitter, it can still sense the infrared rays that the user acts in the projection area, and then know the position indicated by the user in the projection area.
  • the first infrared polarization converter may be, for example, the first polarization converter.
  • the first polarization converter is used for converting the incident light of the first polarization converter into first polarized light.
  • the first infrared polarization converter may include, for example, a second polarization converter and a first wave plate.
  • the second polarization converter converts the incident light of the second polarization converter into a second polarized light.
  • the first wave plate converts the second polarized light from the second polarization converter into the first polarized light.
  • the first wave plate is used to convert incident first polarized light into second polarized light, and used to convert incident second polarized light into first polarized light.
  • the first infrared polarization converter may be arranged on a side of the imaging lens away from the projection area.
  • the first light processor emits light including the image information
  • the light emitted by the first light processor includes a first polarization of a first wavelength Light, the first polarized light of the second wavelength, the first polarized light of the third wavelength, the first polarized visible light is the first polarized light of the first wavelength;
  • the second polarized light emitted by the first light valve The polarized visible light is the second polarized light of the first wavelength, and the polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light;
  • the projection device further includes: a second polarization beam splitter, a third Polarization beam splitter, second light valve, third light valve, and light combiner; wherein the second polarization beam splitter reflects the first polarized light of the second wavelength from the first optical processor, and passes through the The first polarized light of the second wavelength reflected by the second polarization beam splitter vertically enters the second
  • the light of the second wavelength, the light of the third wavelength from the third light valve, the light that is combined by the light combiner exits the light combiner in the target direction, and the light is combined by the light combiner
  • the light of the first wavelength is incident on the imaging lens, the infrared light from the imaging lens is incident on the light combiner in a direction opposite to the target direction, and the light of the first wavelength includes the first wavelength of the first wavelength.
  • the light of the second wavelength includes the first polarized light of the second wavelength and/or the second polarized light of the second wavelength
  • the light of the third wavelength includes the first polarized light of the third wavelength and/or the second polarized light of the third wavelength
  • the light combiner includes: a first reflective layer and a second reflective layer that are perpendicular and intersecting The second reflective layer divides the first reflective layer into two parts with the same area, and the first reflective layer divides the second reflective layer into two parts with the same area; wherein, the The first reflective layer reflects the The light of the first wavelength and the infrared light from the imaging lens, the first reflective layer transmits the light of the second wavelength from the second light valve and the light from the third light valve
  • the light of the third wavelength, the light of the first wavelength from the first light valve is emitted from the first reflective layer along the target direction, and the infrared light from the imaging lens is along the The direction opposite to the target direction is incident on
  • the time for a single light valve to receive light can be increased, thereby increasing the intensity of light emitted from the projection device, so the first light valve can collect the quality
  • the image processor perceives the user's operations in the projected image according to the high-quality image, which is beneficial to improve the accuracy of the image processor's perception of user operations.
  • the projection device further includes: a first polarization interference filter; wherein the first polarization interference filter is used to convert the first wavelength The second polarized light of is converted into the first polarized light of the first wavelength, and the light from the first polarization beam splitter passes through the first polarization interference filter and enters the light combiner.
  • the projection device further includes: a first wave plate; wherein, the first wave plate is used to convert the first polarized light into the second polarized light, And converting the second polarized light into the first polarized light, and the light from the first polarizing beam splitter passes through the first wave plate and is incident on the light combiner.
  • the polarization direction of the light of the first wavelength incident on the light combiner can be changed, thereby improving the reflection of the light of the first wavelength by the first reflective layer. Rate, that is, increase the intensity of light emitted by the light combiner.
  • the determining the indication position of the user on the projection image according to the acquisition result of the image sensor and the acquisition result of the first light valve includes: the acquisition according to the image sensor As a result, the collection result of the first light valve, the collection result of the second light valve, and the collection result of the third light valve determine the indicated position of the user on the projection image.
  • the first reflective layer includes an infrared reflective layer for reflecting infrared light.
  • an infrared reflective layer is provided on the first reflective layer, so that the first reflective layer can reflect infrared light, which helps to ensure the intensity of the infrared light irradiated on the image sensor, and helps ensure the accuracy of user interaction .
  • the infrared reflective layer may be located on the side of the first reflective layer close to the first polarization beam splitter.
  • the first light processor emits light including the image information
  • the light emitted by the first light processor includes a first polarization of a first wavelength Light, the first polarized light of the second wavelength, the first polarized light of the third wavelength, the first polarized visible light is the first polarized light of the first wavelength;
  • the second polarized light emitted by the first light valve The polarized visible light is the second polarized light of the first wavelength, and the polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light;
  • the projection device further includes: a second polarization beam splitter, a third Polarization beam splitter, second light valve, third light valve, and light combiner; wherein the second polarization beam splitter reflects the first polarized light of the second wavelength from the first optical processor, and passes through the The first polarized light of the second wavelength reflected by the second polarization beam splitter vertically enters the second
  • the light of the second wavelength, the light of the third wavelength from the third light valve, the light that is combined by the light combiner exits the light combiner in the target direction, and the light is combined by the light combiner
  • the light of the first wavelength is incident on the imaging lens, the infrared light from the imaging lens is incident on the light combiner in a direction opposite to the target direction, and the light of the first wavelength includes the first wavelength of the first wavelength.
  • the light of the second wavelength includes the first polarized light of the second wavelength and/or the second polarized light of the second wavelength
  • the light of the third wavelength includes the first polarized light of the third wavelength and/or the second polarized light of the third wavelength
  • the light combiner includes: a vertical and intersecting third reflection layer and a fourth reflection
  • the fourth reflective layer divides the third reflective layer into two parts with the same area
  • the third reflective layer divides the fourth reflective layer into two parts with the same area.
  • the third reflective layer transmits the all from the first light valve The light of the first wavelength, the light of the second wavelength from the second light valve, and the infrared light from the imaging lens, and the third reflective layer reflects the light from the third The light of the third wavelength of the light valve, the fourth reflective layer transmits the light of the first wavelength from the first light valve, the light of the third wavelength from the third light valve Wavelength of light and the infrared light from the imaging lens, the fourth reflective layer reflects the light of the second wavelength from the second light valve.
  • the time for a single light valve to receive light can be increased, thereby increasing the intensity of light emitted from the projection device, so the first light valve can collect the quality
  • the image processor perceives the user's operation in the projected image according to the high-quality image, which is beneficial to improve the accuracy of the image processor's perception of the user's operation.
  • the first light processor emits light including the image information
  • the light emitted by the first light processor includes a first polarization of a first wavelength Light, first polarized light of the second wavelength, and first polarized light of the third wavelength
  • the first polarized visible light is the first polarized light of the first wavelength
  • the second light emitted by the first light valve The polarized visible light is the second polarized light of the first wavelength, and the polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light
  • the projection device further includes: a first polarization interference filter, Second polarization beam splitter, first wave plate, second wave plate, second polarization interference filter, third polarization beam splitter, second light valve, third light valve, third polarization interference filter, fourth Polarization beam splitter; wherein the light emitted by the first optical processor passes through the first polarization interference filter and enters the second polarization beam splitter,
  • Polarized light is incident on the second polarization interference filter; the first wave plate converts the second polarized light of the first wavelength from the second polarization beam splitter into the first wavelength of the first wavelength Polarized light, the first wave plate emits the first polarized light of the first wavelength converted by the first wave plate, and the first polarized light of the first wavelength emitted by the first wave plate is transmitted through The first side is reflected to the first light valve; the second wave plate converts the second polarized light of the first wavelength transmitted through the first polarization beam splitter into the first polarized light of the first wavelength Polarized light, the second wave plate emits the first polarized light of the first wavelength converted by the second wave plate, and the first polarized light of the first wavelength emitted by the second wave plate is incident To the fourth polarization beam splitter; the light of the second wavelength and the light of the third wavelength from the second polarization beam splitter pass through the second polarization interference filter and enter the third A polarization beam splitter, the second polarization interference filter convert
  • the second light valve vertically emits the first polarized light of the second wavelength converted by the second light valve, and the first polarized light of the second wavelength emitted by the second light valve Reflected by the third polarization beam splitter to the third polarization interference filter;
  • the third light valve collects the first polarized light of the third wavelength reflected by the third polarization beam splitter, the The third light valve converts the incident first polarized light of the third wavelength into the second polarized light of the third wavelength, and the third light valve vertically emits the converted light by the third light valve.
  • the second polarized light of the third wavelength, the second polarized light of the third wavelength emitted by the third light valve transmits the third polarizing beam splitter, and the second polarized light of the third wavelength transmitted by the third polarizing beam splitter
  • Two-polarized light is incident on the third polarization interference filter; the light of the second wavelength and the light of the third wavelength from the third polarization beam splitter pass through the third polarization interference filter Incident on the fourth polarization beam splitter, the third polarization interference filter converts the first polarization light of the second wavelength from the third polarization beam splitter into the second polarization light of the second wavelength;
  • the fourth polarizing beam splitter reflects the first polarized light of the first wavelength from the second wave plate, and the fourth polarizing beam splitter transmits the second polarized light from the third polarization interference filter.
  • the second polarized light of the wavelength, the second polarized light of the third wavelength, the first polarized light of the first wavelength reflected by the fourth polarization beam splitter enters the imaging lens, and transmits the fourth polarized light.
  • the second polarized light of the second wavelength and the second polarized light of the third wavelength of the polarization beam splitter are incident on the imaging lens, and the infrared light from the imaging lens is reflected to the imaging lens by the fourth polarization beam splitter.
  • the first polarized light of the first wavelength, the second polarized light of the second wavelength, the second polarized light of the third wavelength and the incident light emitted by the fourth polarization beam splitter On the second side, the first polarized light of the first wavelength, the second polarized light of the second wavelength, the second polarized light of the third wavelength and the incident light emitted by the fourth polarization beam splitter
  • the infrared light of the fourth polarization beam splitter is parallel to each other.
  • the time for a single light valve to receive light can be increased, thereby increasing the intensity of light emitted from the projection device, so the first light valve can collect the quality
  • the image processor perceives the user's operation in the projected image according to the high-quality image, which is beneficial to improve the accuracy of the image processor's perception of the user's operation.
  • the fourth polarization beam splitter combines the light of the first wavelength, the light of the second wavelength and the light of the third wavelength, wherein the light of the second wavelength and the light of the third wavelength can enter the fourth polarization beam splitter in the same direction, so A projection device with a more compact structure can be obtained, which is beneficial to the miniaturization of the projection device.
  • Both the fourth polarization beam splitter and the first polarization beam splitter are provided with an infrared reflective layer, so that the fourth polarization beam splitter and the first polarization beam splitter can both have the ability to reflect infrared light, so there is no need to add additional elements in the projection device.
  • the number of components is more conducive to the compactness of the projection equipment.
  • the first light processor emits light including the image information
  • the light emitted by the first light processor includes a first polarization of a first wavelength Light, first polarized light of the second wavelength, and first polarized light of the third wavelength
  • the first polarized visible light is the first polarized light of the first wavelength
  • the second polarized visible light emitted by the first light valve Is the second polarized light of the first wavelength
  • the polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light
  • the projection device further includes: a first polarization interference filter, a second Polarization beam splitter, second polarization interference filter, third polarization beam splitter, second light valve, third light valve, third polarization interference filter, first wave plate, fourth polarization interference filter, second Four-polarization beam splitter; wherein the light emitted by the first optical processor passes through the first polarization interference filter and enters the second polarization
  • the second polarized light of the wavelength is incident on the first wave plate; the light of the second wavelength and the light of the third wavelength from the second polarization beam splitter pass through the second polarization interference filter Incident to the third polarization beam splitter, the second polarization interference filter converts the incident first polarization of the second wavelength into the second polarization of the second wavelength; the third polarization The beam splitter transmits the second polarized light of the second wavelength from the second polarization interference filter, and the third polarization beam splitter reflects the light of the third wavelength from the second polarization interference filter.
  • the first polarized light, the second polarized light of the second wavelength transmitted through the third polarizing beam splitter is vertically incident on the second light valve, and the light of the third wavelength reflected by the third polarizing beam splitter
  • the first polarized light vertically enters the third light valve;
  • the second light valve collects the second polarized light of the second wavelength transmitted through the third polarization beam splitter, and the second light valve will incident
  • the second polarization of the second wavelength is converted into the first polarization of the second wavelength, and the second light valve vertically emits the first polarization of the second wavelength converted by the second light valve
  • the first polarized light of the second wavelength emitted by the second light valve is reflected by the third polarization beam splitter to the third polarization interference filter;
  • the third light valve is collected by the third polarization interference filter;
  • the first polarized light of the third wavelength reflected by the third polarization beam splitter, the third light valve converts the incident first polarized light of the third
  • the third polarization interference filter polarizes the first polarization of the second wavelength from the third polarization beam splitter.
  • Light is converted into the second polarized light of the second wavelength;
  • the first wave plate converts the second polarized light of the first wavelength from the second polarization beam splitter into the first polarized light of the first wavelength Polarized light, the first wave plate emits the first polarized light of the first wavelength converted by the first wave plate, and the first polarized light of the first wavelength emitted by the first wave plate is transmitted through
  • the first side is reflected to the first light valve;
  • the fourth polarization interference filter converts the second polarized light of the first wavelength from the first light valve into the light of the first wavelength
  • the first polarized light, the fourth polarization interference filter emits the first polarized light of the first wavelength converted by the fourth polarization interference filter, and the fourth polarization interference filter emits
  • the first polarized light of the first wavelength is incident on the fourth polarization beam splitter;
  • the time for a single light valve to receive light can be increased, thereby increasing the intensity of light emitted from the projection device, so the first light valve can collect the quality
  • the image processor perceives the user's operation in the projected image according to the high-quality image, which is beneficial to improve the accuracy of the image processor's perception of the user's operation.
  • the fourth polarization beam splitter combines the light of the first wavelength, the light of the second wavelength and the light of the third wavelength, wherein the light of the second wavelength and the light of the third wavelength can enter the fourth polarization beam splitter in the same direction, so A projection device with a more compact structure can be obtained, which is beneficial to the miniaturization of the projection device.
  • the first infrared polarization converter Through the first infrared polarization converter, the polarization direction of infrared light can be changed, so that the fourth polarization beam splitter and the first polarization beam splitter can realize the function of reflecting infrared light when neither has the ability to reflect infrared light.
  • the projection device selects a relatively traditional polarization beam splitter, it can still sense the infrared rays that the user acts in the projection area, and then know the position indicated by the user in the projection area.
  • the first wavelength is 625-740 nm
  • the second wavelength is 440-475 nm
  • the third wavelength is 492-577 nm.
  • the first wavelength is set to red light
  • the second wavelength is set to blue light
  • the third wavelength is set to green light, which is beneficial to match the standard format of the image (such as red-green-blue (red-green-blue, RGB) format, etc.).
  • the first wavelength is set to a wavelength close to the infrared light, and the infrared light propagates in the direction opposite to the part of the red light path, which is beneficial to increase the intensity of the infrared light irradiated on the image sensor, and therefore is beneficial to improve the image processor Perceive the accuracy of user operations.
  • the infrared light applied by the user in the projection area includes any one of the following: emitted by an infrared remote control and reflected by the projection area Infrared light; infrared light emitted by the infrared light source on the rod; infrared light reflected by the projection area and fingers; infrared light reflected by the projection area and the rod.
  • the projection device can recognize various forms of infrared light, so the user can flexibly choose the medium for interaction with the projection device, which is beneficial to realize the flexibility of projection interaction.
  • a projection device including: a second light processor, an imaging lens, a first polarization beam splitter, a first polarization beam splitter, a first light valve, a second infrared polarization converter, an image sensor, an image Processor; wherein, the second light processor emits second polarized visible light including image information of the projected image, the second polarized visible light belongs to the second polarized light; the first polarization beam splitter transmits from the second The second polarized visible light of the optical processor, the second polarized visible light transmitted through the first polarization beam splitter is incident perpendicularly to the first light valve; the first light valve collects the second polarized visible light transmitted through the first polarization beam splitter The second polarized visible light, the first light valve converts the incident second polarized visible light into the first polarized visible light, the first light valve vertically emits the first polarized visible light converted by the first light valve, the The first polarized visible light emitted by the
  • the first polarized visible light reflected by the first polarization beam splitter passes through the second infrared polarization converter, the imaging lens and exits the projection device, and the light exiting the projection device is in the projection area
  • the projection image is formed, the infrared light applied by the user in the projection area is incident on the projection device, and the infrared light incident on the projection device passes through the imaging lens and is incident on the second infrared polarization converter
  • the second infrared polarization converter converts infrared light from the imaging lens into a second polarized infrared light, and the second polarized infrared light converted by the second infrared polarization converter belongs to the second polarized light
  • the second infrared polarization converter emits second polarized infrared light converted by the second infrared polarization converter, and the second polarized infrared light emitted by the second infrared polarization converter transmits the first polarization splitter
  • the wavelength of the second polarized visible light may be, for example, 380 nm to 780 nm.
  • the second polarized light may be S-polarized light or P-polarized light, for example.
  • S-polarized light can mean that the polarization direction of the light is perpendicular to the incident surface.
  • P-polarized light can mean that the polarization direction of the light is parallel to the incident surface.
  • the second infrared polarization converter may be, for example, a second polarization converter.
  • the second polarization converter can convert the incident light of the second polarization converter into a second polarized light.
  • the second infrared polarization converter may include, for example, a second polarization converter and a first wave plate.
  • the second polarization converter can convert the incident light of the second polarization converter into a second polarized light.
  • the wave plate can convert the second polarized light into the first polarized light, and can also convert the first polarized light into the second polarized light.
  • the infrared light from the projection area is reflected to the image sensor through the first polarization beam splitter, so the projection device can use the collected infrared light to perceive the user's operation in the projection area, so the projection device provided in this application can Provide users with more control functions, which can be used in more demonstration occasions.
  • the second infrared polarization converter By providing the second infrared polarization converter, the polarization direction of the infrared light can be changed, so that the function of reflecting infrared light can be realized when the first polarization beam splitter itself does not have the ability to reflect infrared light.
  • the projection device selects a relatively traditional polarization beam splitter, it can still sense the infrared rays that the user acts in the projection area, and then know the position indicated by the user in the projection area.
  • the second optical processor emits light including the image information
  • the light emitted by the second optical processor includes a second polarization of a first wavelength Light, second polarized light of the second wavelength, second polarized light of the third wavelength, the second polarized visible light is the second polarized light of the first wavelength;
  • the first polarized visible light emitted by the first light valve Is the first polarized light of the first wavelength;
  • the projection device further includes: a second polarization beam splitter, a third polarization beam splitter, a second light valve, a third light valve, and a light combiner; wherein, the first polarization beam splitter
  • the two-polarization beam splitter transmits the second polarized light of the second wavelength from the second optical processor, and transmits the second polarized light of the second wavelength of the second polarization beam splitter to vertically enter the first Two light valves;
  • the second light valve collects the second polarized light of the second wavelength transmitted through the second
  • the time for a single light valve to receive light can be increased, thereby increasing the intensity of light emitted from the projection device, so the first light valve can collect the quality
  • the image processor perceives the user's operation in the projected image according to the high-quality image, which is beneficial to improve the accuracy of the image processor's perception of the user's operation.
  • the first reflective layer includes an infrared reflective layer for reflecting infrared light.
  • an infrared reflective layer is provided on the first reflective layer, so that the first reflective layer can have the ability to reflect infrared light.
  • the number of components in the projection device may not be additionally increased, so that the structure of the projection device is more compact.
  • the second infrared polarization converter includes: a first polarization converter and a fifth polarization interference filter; wherein, the first polarization converter is used for The light passing through the first polarization converter is converted into the first polarized light, and the infrared light from the imaging lens is converted into the first polarization infrared light by the first polarization converter.
  • the first polarized infrared light converted by the polarization converter belongs to the first polarized light; the fifth polarization interference filter converts the first polarized infrared light from the first polarization converter into the second polarized infrared light .
  • the polarization state of infrared light can be changed without changing the polarization state of the light of the first wavelength, so that the light of the first wavelength passes through the fifth polarization interference filter.
  • the light sheet is basically unaffected, so the quality of the projected image can be guaranteed.
  • the second optical processor emits light including the image information
  • the light emitted by the second optical processor includes a second polarization of a first wavelength Light, second polarized light of the second wavelength, second polarized light of the third wavelength, the second polarized visible light is the second polarized light of the first wavelength;
  • the first polarized visible light emitted by the first light valve Is the first polarized light of the first wavelength;
  • the projection device further includes: a second polarization beam splitter, a third polarization beam splitter, a second light valve, a third light valve, and a light combiner; wherein, the first polarization beam splitter
  • the two-polarization beam splitter transmits the second polarized light of the second wavelength from the second optical processor, and transmits the second polarized light of the second wavelength of the second polarization beam splitter to vertically enter the first Two light valves;
  • the second light valve collects the second polarized light of the second wavelength transmitted through the second
  • the light of the third wavelength includes the first polarized light of the third wavelength and/or the second polarized light of the third wavelength;
  • the light combiner includes a vertical and intersecting third reflective layer and a fourth reflective layer.
  • the fourth reflective layer divides the third reflective layer into two parts with the same area.
  • the third reflective layer divides the The fourth reflective layer is divided into two parts with the same area, wherein the The third reflective layer transmits light of the first wavelength from the first light valve, light of the second wavelength from the second light valve, and infrared light from the second infrared polarization converter, The third reflective layer reflects the light of the third wavelength from the third light valve, and the fourth reflective layer transmits the light of the first wavelength from the first light valve and the light from the first light valve. The light of the third wavelength of the three light valve and the infrared light from the second infrared polarization converter, and the fourth reflective layer reflects the light of the second wavelength from the second light valve.
  • the time for a single light valve to receive light can be increased, thereby increasing the intensity of light emitted from the projection device, so the first light valve can collect the quality
  • the image processor perceives the user's operations in the projected image according to the high-quality image, which is beneficial to improve the accuracy of the image processor's perception of user operations.
  • the second optical processor emits light including the image information
  • the light emitted by the second optical processor includes a second polarization of a first wavelength Light, a second polarized light of a second wavelength, and a second polarized light of a third wavelength
  • the second polarized visible light is the second polarized light of the first wavelength
  • the first polarized visible light emitted by the first light valve Is the first polarized light of the first wavelength
  • the projection device further includes: a first polarization interference filter, a second polarization beam splitter, a second polarization interference filter, a third polarization beam splitter, and a second light Valve, a third light valve, a third polarization interference filter, a first wave plate, a fourth polarization interference filter, and a fourth polarization beam splitter; wherein the light emitted by the first light processor passes through the The first polarization interference filter is incident on the second polarization beam splitter, and
  • Two-polarized light is incident on the second polarization interference filter, and the first polarized light of the first wavelength reflected by the second polarization beam splitter is incident on the first wave plate; from the second polarization
  • the light of the second wavelength and the light of the third wavelength of the beam splitter pass through the second polarization interference filter and enter the third polarization beam splitter, and the second polarization interference filter will enter the third polarization beam splitter.
  • the second polarization of the second wavelength is converted into the first polarization of the second wavelength; the third polarization beam splitter reflects the first polarization of the second wavelength from the second polarization interference filter One polarized light, the third polarization beam splitter transmits the second polarized light of the third wavelength from the second polarization interference filter, and the second wavelength of the second wavelength reflected by the third polarization beam splitter
  • the first polarized light vertically enters the second light valve
  • the second polarized light of the third wavelength that transmits the third polarization beam splitter vertically enters the third light valve;
  • the second light valve collects The first polarized light of the second wavelength reflected by the third polarization beam splitter, the second light valve converts the incident first polarized light of the second wavelength into the second polarized light of the second wavelength Polarized light
  • the second light valve vertically emits the second polarized light of the second wavelength converted by the second light valve, and the second polarized light of the second wavelength emitted by
  • the second polarized light of the first wavelength, the second polarized light of the first wavelength emitted by the first wave plate transmits the first polarization beam splitter, and transmits the first polarization beam splitter of the first polarization beam splitter.
  • the second polarized light of the wavelength is incident on the first light valve; the fourth polarization interference filter will convert the first polarized light of the first wavelength reflected by the first polarization beam splitter into the first polarized light
  • the fourth polarization interference filter emits the second polarized light of the first wavelength converted by the fourth polarization interference filter, and the fourth polarization interference filter
  • the second polarized light of the first wavelength emitted by the film is incident on the fourth polarization beam splitter; the fourth polarization beam splitter transmits the second polarized light of the first wavelength from the fourth polarization interference filter Polarized light, the fourth polarization beam splitter reflects the first polarized light of the second wavelength and the first polarized light of the third wavelength from the
  • the time for a single light valve to receive light can be increased, thereby increasing the intensity of light emitted from the projection device, so the first light valve can collect the quality
  • the image processor perceives the user's operation in the projected image according to the high-quality image, which is beneficial to improve the accuracy of the image processor's perception of the user's operation.
  • the fourth polarization beam splitter combines the light of the first wavelength, the light of the second wavelength and the light of the third wavelength, wherein the light of the second wavelength and the light of the third wavelength can enter the fourth polarization beam splitter in the same direction, so A projection device with a more compact structure can be obtained, which is beneficial to the miniaturization of the projection device.
  • the second infrared polarization converter Through the second infrared polarization converter, the polarization direction of the infrared light can be changed, so that the fourth polarization beam splitter and the first polarization beam splitter can realize the function of reflecting infrared light when neither has the ability to reflect infrared light.
  • the projection device selects a relatively traditional polarization beam splitter, it can still sense the infrared rays that the user acts in the projection area, and then know the position indicated by the user in the projection area.
  • the first wavelength is 625-740 nm
  • the second wavelength is 440-475 nm
  • the third wavelength is 492-577 nm.
  • the first wavelength is set to red light
  • the second wavelength is set to blue light
  • the third wavelength is set to green light, which is beneficial to match the standard format of the image (such as red-green-blue (red-green-blue, RGB) format, etc.).
  • the first wavelength is set to a wavelength close to the infrared light, and the infrared light propagates in the direction opposite to the part of the red light path, which is beneficial to increase the intensity of the infrared light irradiated on the image sensor, and therefore is beneficial to improve the image processor Perceive the accuracy of user operations.
  • the infrared light applied by the user in the projection area includes any one of the following: emitted by an infrared remote control and reflected by the projection area Infrared light; infrared light emitted by the infrared light source on the handheld rod; infrared light reflected by the projection area and infrared light reflected by the finger; infrared light reflected by the projection area and infrared light reflected by the rod.
  • the projection device can recognize the user's indicated position, which is beneficial to realize the flexibility of projection interaction.
  • a projection interaction method is provided, the method is executed by the projection device according to any one of the possible implementation manners of the first aspect to the second aspect, and the method includes: the projection device obtains Multiple collection results of infrared light, the infrared light is emitted by a handheld infrared light source, the projection device includes such as; the projection device determines the user gesture according to the multiple collection results and the projection image of the projection device And the relative position of the user gesture on the projected image; the projection device executes the target operation according to the user gesture and the relative position.
  • the device for collecting infrared light may be, for example, an image sensor in a projection device. Obtaining the collection result may be obtaining data collected by the image sensor.
  • the user holds the infrared emitting device and makes gestures on the projected image.
  • the projection device can perceive the gesture indicated by the user on the projected image, so that it can respond to the user's operation on the projected image.
  • Gesture is a common and flexible way of human-computer interaction.
  • the projection interaction method provided in the present application enables the user to realize the interaction between the user and the projection device through gestures.
  • the user gesture includes any one of a move gesture, a tap gesture, a zoom-in gesture, and a zoom-out gesture.
  • the zoom-in gesture may be, for example, moving the user's indicated position on the projected image clockwise.
  • the zooming out gesture may be, for example, moving the user's indicated position on the projected image counterclockwise.
  • movement gestures, click gestures, zoom-in gestures, and zoom-out gestures all belong to common human-computer interaction gestures.
  • the projection interaction method provided in this application can be applied to common human-computer interaction gestures and has strong flexibility.
  • the handheld infrared light source includes an infrared remote control, or an infrared light source disposed at an end of the handheld rod away from the hand.
  • infrared remote controllers and hand-held rods are common presentation tools.
  • the projection interaction method provided in this application can be applied to common presentation tools and has strong flexibility.
  • Fig. 1 is a schematic diagram of an application scenario of a projection device.
  • Fig. 2 is a schematic diagram of an application scenario of another projection device.
  • Fig. 3 is a schematic diagram of another application scenario of a projection device.
  • FIG. 4 is a schematic structural diagram of the first projection device in a scenario according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of the first projection device in another scenario according to an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of the first projection device in another scenario according to an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a first polarization beam splitter provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of the first part of a projection interaction method provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of the second part of a projection interaction method provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a projection area for performing a movement gesture according to an embodiment of the present application.
  • FIG. 11 is a schematic diagram of a projection area for performing a click gesture according to an embodiment of the present application.
  • FIG. 12 is a schematic diagram of a projection area for performing a zoom-in gesture according to an embodiment of the present application.
  • FIG. 13 is a schematic diagram of a projection area for performing a zooming out gesture provided by an embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a second projection device provided by an embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of a third projection device provided by an embodiment of the present application.
  • FIG. 16 is a schematic structural diagram of a fourth projection device provided by an embodiment of the present application.
  • FIG. 17 is a schematic structural diagram of a fifth projection device provided by an embodiment of the present application.
  • FIG. 18 is a schematic structural diagram of a sixth projection device provided by an embodiment of the present application.
  • FIG. 19 is a schematic structural diagram of a seventh projection device provided by an embodiment of the present application.
  • FIG. 20 is a schematic structural diagram of an eighth projection device provided by an embodiment of the present application.
  • FIG. 21 is a schematic structural diagram of a ninth projection device provided by an embodiment of the present application.
  • FIG. 22 is a schematic structural diagram of a tenth projection device provided by an embodiment of the present application.
  • FIG. 23 is a schematic structural diagram of an eleventh projection device provided by an embodiment of the present application.
  • FIG. 24 is a schematic structural diagram of a twelfth type of projection device provided by an embodiment of the present application.
  • FIG. 25 is a schematic structural diagram of a thirteenth projection device provided by an embodiment of the present application.
  • a and B can be singular or plural.
  • the character "/" generally indicates that the associated objects before and after are in an “or” relationship.
  • this application uses “first”, “second”, numbers, letters and other forms to illustrate examples, but it is limited to distinguishing embodiments, components, steps, etc., and does not limit the embodiments of this application. Sexual description.
  • references described in this specification to "one embodiment” or “some embodiments”, etc. mean that one or more embodiments of the present application include a specific feature, structure, or characteristic described in combination with the embodiment. Therefore, the sentences “in one embodiment”, “in some embodiments”, “in some other embodiments”, “in some other embodiments”, etc. appearing in different places in this specification are not necessarily All refer to the same embodiment, but mean “one or more but not all embodiments” unless it is specifically emphasized otherwise.
  • the terms “including”, “including”, “having” and their variations all mean “including but not limited to”, unless otherwise specifically emphasized.
  • the projection device 110 may include a light outlet 111 from which light with image information may be emitted.
  • the shape of the light outlet 111 may be circular.
  • the light emitted from the projection device 110 can be irradiated on the projection area 120 so that the image information contained in the light can be displayed on the projection area 120.
  • the projection area 120 may be a part of objects such as a vertical wall, a horizontal roof, a table top, the ground, and a curtain.
  • the light emitted from the light exit 111 can pass through the distance between the light exit 111 and the projection area 120 and can diverge to the surroundings, so that the size of the light exit 111 can be much smaller than the size of the projection area 120.
  • FIG. 1 shows a situation where the distance between the light outlet 111 and the projection area 120 is relatively large.
  • FIG. 2 shows a situation where the distance between the light exit 111 and the projection area 120 is relatively small.
  • the maximum value of the angle between the light emitted by the light outlet 111 and the axis perpendicular to the light outlet 111 is A.
  • the maximum value of the angle between the light emitted from the light outlet 111 and the axis perpendicular to the light outlet 111 is B. Obviously, B can be greater than A.
  • the light exit 111 and the projection area 120 may be arranged in parallel or approximately in parallel.
  • the projection device 110 shown in FIG. 1 and FIG. 2 can be placed on the ground, a desktop, or fixed on a horizontal roof or a vertical wall, and the light outlet 111 is (approximately) perpendicular to the ground; then, the projection area 120 It can be located on a wall (approximately) perpendicular to the ground or a hanging curtain.
  • the light outlet 111 is (approximately) parallel to the ground; then, the projection area 120 It can be located on the horizontal roof, the ground, or on the desktop.
  • the light exit 111 and the projection area 120 may be perpendicular or approximately perpendicular.
  • the projection device 110 can be placed on the ground, a desktop, or fixed on a horizontal roof or a vertical wall, and the light outlet 111 is (approximately) perpendicular to the ground; then, the projection area 120 can be located on the ground, a desktop, or a horizontal roof. on.
  • the projection device 110 can also be placed on the ground, a desktop, or fixed on a horizontal roof or a vertical wall, and the light outlet 111 is (approximately) perpendicular to the wall; then, the projection area 120 can be located (approximately) perpendicular to the ground On the walls, hanging curtains.
  • the projection device 110 may obtain the image information.
  • the projection device 110 may store one or more images, and the manner in which the projection device 110 obtains the image information may be that the projection device 110 reads the image information from a storage medium.
  • the projection device 110 can receive the image information sent by an electronic device, such as a mobile phone, a server, a watch, a router, a tablet computer, an e-reader, a notebook computer, a digital camera, or a wearable device.
  • the projection device 110 may access a wireless local area network (WLAN) through a router 130, and receive the image information from a cloud server.
  • WLAN wireless local area network
  • the projection device 110 may receive the image information sent by the electronic device 140 through a Bluetooth communication protocol.
  • the projection device 110 may receive the image information sent by the electronic device 150 through a hardware interface (for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, etc.).
  • a hardware interface for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, etc.
  • Figures 4 to 6 show schematic structural diagrams of a projection device provided by the present application.
  • the projection device 401 shown in FIGS. 4 to 6 may be the projection device 110 shown in FIGS. 1 to 3.
  • the light emitted by the projection device 401 can be projected on the projection area 402, so that an image can be displayed on the projection area 402.
  • the projection area 402 may be the projection area 120 as shown in FIGS. 1 to 3.
  • the projection device 401 may include a first light processor 410, a first polarization beam splitter 420, a first light valve 430, an image sensor 440, and an imaging lens 450.
  • the first light processor 410 can emit the first polarized visible light.
  • the wavelength of the first polarized visible light may be, for example, 380 nm to 780 nm.
  • the first polarized visible light belongs to the first polarized light.
  • the first polarized light may be, for example, S-polarized light or P-polarized light.
  • S-polarized light can mean that the polarization direction of the light is perpendicular to the incident surface.
  • P-polarized light can mean that the polarization direction of light is parallel to the incident surface.
  • the light emitted by the first light processor 410 contains image information of the projected image.
  • the first optical processor 410 may include, for example, a light source 411 and a polarization converter 412.
  • the light source 411 can provide light for the projection device 401.
  • the light emitted by the light source 411 contains image information of the projected image.
  • the light emitted by the light source 411 may be natural light. Natural light usually includes first polarized light and second polarized light, and the polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light.
  • the first polarized light may be, for example, S polarized light
  • the second polarized light may be, for example, P polarized light.
  • the first polarized light may be, for example, P polarized light
  • the second polarized light may be, for example, S polarized light.
  • the light source 411 may include one or more light-emitting diodes (LEDs).
  • LEDs light-emitting diodes
  • the light source 411 may include an array of light emitting units.
  • the light-emitting unit array includes a plurality of light-emitting unit groups; each light-emitting unit group is composed of a red light-emitting unit, a green light-emitting unit, and a blue light-emitting unit; the target light-emitting unit in any light-emitting unit group is divided from any light-emitting unit group.
  • Other light-emitting units except the target light-emitting unit are all adjacent; the target light-emitting unit may be any one of a red light-emitting unit, a green light-emitting unit, and a blue light-emitting unit.
  • the projection device 401 can selectively drive the light-emitting unit array to emit light according to the image information to be projected.
  • the light source 411 may include a light-emitting unit array, a liquid crystal layer, and a filter layer.
  • the light emitting unit array includes a plurality of light emitting units.
  • the filter layer includes a plurality of filter unit groups; each filter unit group is composed of a red light filter, a green light filter and a blue light filter; the target filter in any filter unit group and the Other filters in any filter unit group except the target filter are adjacent; the target filter can be any one of a red filter, a green filter, and a blue filter.
  • the liquid crystal layer selectively transmits light from the light emitting unit array.
  • the projection device 401 can drive the liquid crystal layer to selectively transmit light from the light emitting unit array according to the image information to be projected.
  • the polarization converter 412 can convert the light from the light source 411 into the first polarized light.
  • the polarization converter 412 can convert the second polarized light emitted by the light source 411 into the first polarized light, and transmit the first polarized light emitted by the light source 411. Light.
  • the polarization converter 412 can filter the second polarized light emitted by the light source 411 and transmit the first polarized light emitted by the light source 411.
  • the first light processor may not include a light source.
  • the light emitted by the light source arranged in the projection device can be converted by the first light processor, so that the first light processor can emit the first polarized light.
  • the first polarization beam splitter 420 may reflect the first polarized light and transmit the second polarized light.
  • the first polarized visible light from the first light processor 410 may be incident on the first side A of the first polarization beam splitter 420.
  • the first polarized visible light reflected by the first side A of the first polarization beam splitter 420 may be vertically incident on the first light valve 430.
  • the first polarized visible light incident on the first polarization beam splitter 420 may be parallel to the first light valve 430.
  • the first polarized visible light from the first light processor 410 may enter the first polarization beam splitter 420 at an incident angle of 45°, and exit the first polarization beam splitter 420 at an exit angle of 45°. Therefore, the first polarized visible light emitted from the first polarization beam splitter 420 can be perpendicularly injected into the first light valve 430.
  • the first light valve 430 may collect the first polarized visible light from the first polarization beam splitter 420.
  • the first light valve 430 can convert the vertically incident first-polarized visible light into a second-polarized visible light, and emit the second-polarized visible light vertically.
  • the second polarized visible light belongs to the second polarized light.
  • the first light valve 430 may convert incident S-polarized light into P-polarized light.
  • the first light valve 430 may convert incident P-polarized light into S-polarized light.
  • the first light valve 430 may be, for example, a liquid crystal on silicon (LCoS) chip, a digital micromirror device (DMD), or the like.
  • the second polarized visible light emitted by the first light valve 430 can be incident on the first side A of the first polarization beam splitter 420. Since the first polarizing beam splitter 420 can transmit the second polarized light, the second polarized visible light from the first light valve 430 can enter from the first side A of the first polarizing beam splitter 420, and from the first polarizing beam splitter 420. The second side B exits and reaches the imaging lens 450. Thus, the light containing the image information of the projected image can be incident on the imaging lens 450.
  • the imaging lens 450 can image the projected image in the projection area 402.
  • the light emitted by the first light valve 430 and containing the image information of the projected image can pass through the imaging lens 450, exit the projection device 401, and be projected in the projection area 402. Therefore, the first light valve 430 and the projection area 402 satisfy the object-image conjugate relationship.
  • the imaging lens 450 may be a convex lens or a lens group including a plurality of lenses.
  • the imaging lens 450 may be a lens with zoom performance or a lens with a fixed focal length.
  • the user can observe the projection image projected by the projection device 401 in the projection area 402.
  • the user can apply infrared light in the projection area 402 to indicate on the projected image.
  • the user can apply infrared light to the projection area 402 by using an infrared remote control to emit infrared light to the projection area 402, and the infrared light can be reflected by the projection area 402; a rod held by the user indicates in the projection area 402, the rod
  • the infrared light source can emit infrared light; the infrared light source illuminates the projection area 402, and the finger can reflect infrared light in the projection area 402; the infrared light source illuminates the projection area 402, and the rod can reflect infrared light in the projection area 402.
  • the double-dotted dotted line represents infrared light
  • the solid line with arrows represents visible light including image information of the projected image.
  • the user when the user uses the projection device 401, the user can use the infrared remote control 461 to emit infrared light toward the projection area 402, so that the projection position 403 of the infrared light can appear on the projection area 402.
  • the infrared light emitted by the infrared remote controller 461 can be reflected to the projection device 401 through the projection area 402, so that the projection device 401 can determine the projection position 403 of the infrared light.
  • the projection position 403 of the infrared light may be the position indicated by the user on the projection image.
  • the user By moving and staying at the projection position 403 of the infrared light, the user can implement a click gesture, a movement gesture, etc. on the projected image, thereby realizing interaction with the projection device 401.
  • the projection device 401 further includes an infrared light source 561, and the infrared light source 561 can emit infrared light to the projection area 402. Therefore, the content presented on the projection area 402 may include a projected image and infrared light irradiated on the projected image. The infrared light irradiated on the projection area 402 can be reflected to the projection device 401.
  • the user can use a hand (or a hand-held rod) 562 or the like to indicate a part of the projected image.
  • the position 503 indicated by the finger (or the end of the holding rod away from the hand) on the projection area 402 may be the position indicated by the user on the projected image.
  • the projection device 401 can determine whether the finger is in position based on the infrared light reflected by the projection area 402 and the infrared light reflected by the hand (or hand-held rod) 562 The position on the projected image (or the position of the end of the hand-held rod away from the hand on the projected image) is used to determine the position indicated by the user on the projected image.
  • the user can use the hand (or the hand-held rod) 562 to stay, slide, etc. on the projected image to implement corresponding gestures.
  • the user when using the projection device 401, can use a hand-held rod 662 including an infrared light source 661 to indicate a part of the projected image.
  • the infrared light source 661 may be located at an end of the hand-held rod 662 away from the hand, and the position 603 indicated by the infrared light source 661 on the projection area 402 may be the position indicated by the user on the projected image.
  • the infrared light emitted by the infrared light source 661 on the handheld rod 662 can be reflected to the projection device 401, so that the projection device 401 can determine the position indicated by the user on the projected image. Therefore, in the process of using the projection device 401, the user can use the hand-held rod 662 including the infrared light source 661 to stop and slide the infrared light source 661 to implement corresponding gestures.
  • the position indicated by the user on the projection image may be the projection position 403 of the infrared light emitted by the infrared remote control 461 on the projection area 402.
  • the position indicated by the user on the projected image may also be indicated by the finger (or the end of the holding rod away from the hand) on the projection area 402 Location 503.
  • the position indicated by the user on the projection image may also be the position 603 indicated on the projection area 402 by the infrared light source 661 on the handheld rod 662.
  • the position indicated by the user on the projected image can be determined by the infrared light reflected to the imaging lens 450.
  • the position indicated by the user on the projection image may form a real image on the side of the imaging lens 450 away from the projection area 402. Since the intensity of the light emitted by the projection device 401 is relatively weak, the real image formed by the projected image on the side of the imaging lens 450 away from the projection area 402 can be ignored. According to the reversibility of light, the infrared light incident on the projection device 401 may pass through the imaging lens 450 to the second side B of the first polarization beam splitter 420.
  • the first polarization beam splitter 420 may also reflect infrared light.
  • the infrared light from the imaging lens 450 may enter the first polarizing beam splitter 420 at an incident angle of 45°, and exit the first polarizing beam splitter 420 at an exit angle of 45°.
  • the first polarization beam splitter 420 can reflect the first polarized light and transmit the second polarized light, it can be concluded that the first polarization beam splitter 420 can reflect the first polarized light and infrared light, and transmit other than the first polarized light and infrared light. Other light. That is, the first polarization beam splitter 420 may transmit the second polarized light having a wavelength different from that of infrared light.
  • the first polarization beam splitter 420 may include an infrared reflective layer and a polarization beam splitter layer.
  • the polarization splitting layer may reflect the first polarized light and transmit the second polarized light.
  • the infrared reflective layer can reflect infrared light and transmit light having a wavelength different from that of infrared light, such as visible light.
  • the first polarized light can include the first polarized infrared light and the first polarized visible light
  • the second polarized light can include the second polarized infrared light and the second polarized visible light.
  • first polarized infrared light and the second polarized infrared light belong to Infrared light
  • first polarized visible light and second polarized visible light belong to visible light.
  • the infrared reflective layer and the polarization splitting layer shown in FIG. 7 are only structural schematic diagrams. Since the thickness of the infrared reflective layer and the polarization beam splitting layer is relatively thin, the refraction of light in the infrared reflective layer and the polarization beam splitting layer can be ignored.
  • the infrared light may be reflected on the infrared reflective layer.
  • the second polarized infrared light in the infrared light can pass through the polarization splitting layer and be reflected on the infrared reflective layer; Polarized infrared light can be reflected on the polarization beam splitting layer.
  • the first polarized light may be reflected on the polarizing light splitting layer.
  • the first polarized visible light in the first polarized light can pass through the infrared reflective layer and be reflected on the polarized beam splitter;
  • the first polarized infrared light in the light can be reflected on the infrared reflective layer.
  • infrared light when infrared light is incident from the polarization beam splitting layer, part of the infrared light will be reflected on the infrared reflective layer, and another part of the infrared light will be reflected on the polarization beam splitting layer, so that the reflection of infrared light may be misaligned or deviated.
  • the first polarized light is incident from the infrared reflective layer side, and the reflection of the first polarized light may also be misaligned or deviated.
  • the thinner the thickness of the infrared reflection layer and the polarization beam splitting layer the two parts of the light are caused by the reflection of the infrared reflection layer and the polarization beam splitting layer respectively.
  • the first polarized light from the first optical processor 410 may be incident on the first polarizing beam splitter 420 from the side of the polarization splitting layer, and the infrared light from the imaging lens 450 may be incident on the side of the infrared reflecting layer into the second polarization beam splitter.
  • the infrared light reflected by the second side B of the first polarization beam splitter 420 may be incident on the image sensor 440. Therefore, the imaging lens 450 can image the position 403 indicated by the user on the projection image on the image sensor 440. That is, the infrared light from the projection area 402 may pass through the imaging lens 450 and be projected on the image sensor 440. Therefore, the projection area 402 and the image sensor 440 satisfy the object-image conjugate relationship.
  • the infrared light can be collected by the image sensor 440 to determine the position 403 indicated by the user on the projected image.
  • the first light valve 430 and the projection area 402 satisfy the object-image conjugate relationship, the first light valve 430 can collect the projection image in the projection area 402. Therefore, the image processor (not shown in FIGS. 4 to 6) determines the user's indicated position on the projection image according to the collection result collected by the image sensor 440 and the collection result collected by the first light valve 430.
  • An embodiment of the present application also provides a method for projection interaction.
  • the device for executing the method 800 may be, for example, the projection device provided in this application.
  • the infrared light incident on the projection device may be infrared light emitted by an infrared remote control and reflected by the projection area.
  • the infrared light incident on the projection device may also be the infrared light emitted by the infrared light source on the rod.
  • the infrared light incident on the projection device may also be the infrared light reflected by the projection area and the finger.
  • the infrared light incident on the projection device may also be the infrared light reflected by the projection area and the rod.
  • the device for collecting infrared light may be, for example, the image sensor 440 in the projection device 401.
  • Obtaining the collection result may be obtaining data collected by the image sensor 440.
  • the infrared light is emitted from a handheld infrared light source.
  • the hand-held infrared light source may be an infrared remote control, for example.
  • the infrared light emitted by the infrared remote control can be reflected to the projection device through the projection area.
  • the hand-held infrared light source can also be an infrared light source arranged at the end of the hand-held rod away from the hand.
  • Figures 8 and 9 are schematic diagrams of a user's instruction on a projected image provided by an embodiment of the present application.
  • the projection device 401 acquires a target image 901 that can be projected in the projection area 402.
  • the projection device 401 may project a part of the target image 901 on the projection area 402.
  • the part of the target image 901 located within the dotted rectangular frame 902 may be the projected image currently projected by the projection device 401 in the projection area 402; and the part of the target image 901 located outside the dotted rectangular frame 902 may not be The projection device 401 is projected in the projection area 402.
  • the projection device 401 can drive the first light processor to emit light as needed to project the projected image in the projection area 402, so that the light containing the projected image can be incident on the first light valve 430, so the first light valve 430 can capture
  • 903 in FIG. 8 and FIG. 9 may represent a projection image irradiated on the first light valve 430.
  • the light emitted by the first light valve 430 can be emitted from the projection device 401 and projected in the projection area 402.
  • 904 in FIG. 9 may represent a projection image projected in the projection area 402.
  • the user can use a hand-held rod with an infrared light source provided at the distal end, an infrared remote control, a hand, a hand-held rod, etc., to achieve interaction with the projection device 401 by indicating in the projected image.
  • 8 and 9 show examples of using the infrared remote controller 461 to interact with the projection device 401.
  • the black dot 905 in FIG. 9 may be the current user's indicated position in the projected image.
  • the infrared light emitted from the indicated position 905 on the projection area 402 can enter the projection device 401 and reach the image sensor 440.
  • 906 in FIG. 9 may represent the user's indicated position collected by the image sensor 440.
  • the dashed line in the image sensor 440 corresponds to the outline of the projected image.
  • the projection device 401 can superimpose the projection image 903 on the first light valve 430 with the indication position 906 collected by the image sensor 440 to determine the user's indication position on the projection image.
  • said obtaining the collection result of infrared light includes: obtaining a plurality of said collection results; said determining the user’s position on the projection image based on the collection result and the projection image of the projection device
  • Indicating a position includes: determining a user gesture and a relative position of the user gesture on the projected image according to the multiple collection results and the projection image of the projection device; the method further includes: according to the The user gesture and the relative position perform the target operation.
  • multiple indication positions of the user on the projected image can be connected together to determine the user's gesture. Then, according to at least one of the multiple indication positions, the position of the user gesture relative to the projected image is determined.
  • FIGS. 10 to 13 illustrate the user gesture, the relative position of the user gesture on the projected image, and the target operation.
  • FIG. 10 shows an example in which the user makes a movement gesture on the projected image.
  • the user's indicated position on the projected image can move.
  • the black circle in FIG. 10 can indicate the user's pointing position on the projected image.
  • the arrow filled with a diagonal line and indicating the black dot can indicate the moving direction of the indicated position.
  • the projection device can update the part to be projected in the projection area 402 in the target image (target image 1001 in FIG.
  • the user's indicated position on the projected image moves to the right, and the part of the target image to be projected may be the image located on the left side of the current projected image.
  • the user can observe in the projection area 402, and the image in the projection area 402 can move following the position indicated by the user.
  • the user can use an infrared remote control to emit infrared light toward the projection area 402 and move the projection position of the infrared light on the projected image.
  • the projection device can update the projected image in the projection area 402 according to the sliding track of the infrared light on the projection area 402 to perform operations related to the movement gesture.
  • the projection device further includes an infrared light source that emits infrared light to the projection area 402.
  • the user's finger can slide on the projected image.
  • the projection device can update the projection image in the projection area 402 according to the sliding track of the finger on the projection area 402 to perform operations related to the movement gesture.
  • the projection device further includes an infrared light source that emits infrared light to the projection area 402.
  • the user can use the hand-held rod to indicate on the projected image and move the end of the hand-held rod away from the hand.
  • the projection device can update the projected image in the projection area 402 according to the sliding track of the distal end of the handheld rod on the projection area 402 to perform operations related to the movement gesture.
  • FIG. 11 shows an example in which the user makes a tap gesture on the projected image.
  • the user can indicate on the projected image.
  • the black circle in FIG. 11 can indicate the user's pointing position on the projected image.
  • the target area 1101 on the projected image may correspond to the target address.
  • the projection device can access the target address and project the access result 1102 in the projection area 402. Therefore, when the user's indicated position on the projected image stays on the target area 1101 on the projected image, it can be considered that the user is clicking on the target area 1101.
  • the user can observe the visit result 1102 corresponding to the target area 1101 in the projection area 402 through a tap gesture.
  • the projection device further includes an infrared light source that emits infrared light to the projection area 402.
  • the user's finger can stay in the target area 1101 in the projected image.
  • the projection device can determine the location of the user in the projected image according to the location of the finger to perform operations related to the tap gesture.
  • the projection device further includes an infrared light source that emits infrared light to the projection area 402.
  • the user can use the hand-held rod to indicate on the projected image, and make the end of the hand-held rod away from the hand stay in the target area 1101 in the projected image.
  • the projection device can determine the user's click position in the projected image according to the stay position of the distal end of the hand-held rod on the projection area 402 to perform operations related to the click gesture.
  • the user can use a hand-held rod that includes an infrared light source and make the infrared light source stay in the target area 1101 in the projected image.
  • the projection device can determine the user's click position in the projected image according to the position of the infrared light source on the handheld rod on the projection area 402 to perform operations related to the click gesture.
  • FIG. 12 shows an example in which the user makes a zoom-in gesture on the projected image.
  • the user can point on the projected image and move the pointing position on the projected image clockwise.
  • the black circle in FIG. 12 may indicate the user's indicated position on the projected image.
  • the dashed circular arc in FIG. 12 may indicate that the indicated position is moved in a clockwise direction.
  • the dots filled with oblique lines in FIG. 12 can indicate the indicated position after being moved clockwise. Therefore, after the user's indicated position on the projected image moves (approximately) one circle clockwise on the projected image, the user can observe the enlarged projected image in the projection area 402.
  • the user can use an infrared remote control to emit infrared light toward the projection area 402, and make the projection position of the infrared light move one circle clockwise on the projected image.
  • the projection device can perform operations related to the magnification gesture according to the movement track of the projection position of the infrared light on the projection image.
  • the projection device further includes an infrared light source that emits infrared light to the projection area 402.
  • the user's finger can move clockwise on the projected image one week.
  • the projection device can perform operations related to the zooming gesture according to the movement track of the finger on the projected image.
  • the projection device further includes an infrared light source that emits infrared light to the projection area 402.
  • the user can use the hand-held rod to indicate on the projected image, and move the end of the hand-held rod away from the hand clockwise on the projected image.
  • the projection device can perform operations related to the magnification gesture according to the movement track of the distal end of the hand-held rod on the projection area 402.
  • the user can use a hand-held rod that includes an infrared light source, and make the infrared light source move clockwise on the projected image one circle.
  • the projection device can perform operations related to the magnification gesture according to the movement track of the infrared light source on the handheld rod on the projection area 402.
  • FIG. 13 shows an example in which the user makes a zoom out gesture on the projected image.
  • the user can point on the projected image and move the pointing position on the projected image counterclockwise.
  • the black circle in FIG. 13 can indicate the user's pointing position on the projected image.
  • the dashed circular arc in FIG. 13 may indicate that the indicated position is moved in the counterclockwise direction.
  • the dots filled with oblique lines in FIG. 13 can indicate the indicated position after being moved counterclockwise. Therefore, after the user's indicated position on the projected image moves (approximately) one round counterclockwise on the projected image, the user can observe the reduced projected image in the projection area 402.
  • the user can emit infrared light toward the projection area 402 by means of an infrared remote control, and move the projection position of the infrared light on the projected image counterclockwise for one circle.
  • the projection device can perform operations related to the zoom-out gesture according to the movement track of the projection position of the infrared light on the projection image.
  • the projection device further includes an infrared light source that emits infrared light to the projection area 402.
  • the user can use the hand-held rod to indicate on the projected image, and make the end of the hand-held rod away from the hand move one round counterclockwise on the projected image.
  • the projection device can perform operations related to the zoom-out gesture according to the movement track of the distal end of the hand-held rod on the projection area 402.
  • the user can use a hand-held rod that includes an infrared light source and move the infrared light source one week counterclockwise on the projected image.
  • the projection device can perform operations related to the zoom-out gesture according to the movement track of the infrared light source on the handheld rod on the projection area 402.
  • the embodiments of the present application do not limit the specific forms of the aforementioned movement gesture, tap gesture, zoom-in gesture, and zoom-out gesture.
  • the aforementioned zoom-in gesture may also increase the distance between two fingers.
  • the aforementioned zoom-out gesture may also be to narrow the distance between two fingers.
  • an infrared reflective layer is provided on the first polarization beam splitter 420 so that most of the infrared light from the imaging lens 450 can be reflected to the image sensor 440 through the first polarization beam splitter 420. Therefore, the intensity of infrared light reaching the image sensor 440 may be higher.
  • the projection device may have stronger capabilities to adapt to scenarios where the intensity of the infrared light incident on the projection device is relatively weak.
  • the image sensor collects infrared light, which can reduce the false collection of visible light and reduce the deviation between the user operation captured by the projection device and the operation actually performed by the user. Therefore, when the projection device can relatively accurately capture user operations, the projection device is easier to adapt to a variety of human-computer interaction scenarios.
  • the user can interact with the projection device at a relatively far distance from the projection area; for another example, the distance between the projection device and the projection area can be relatively long; for another example, the user can use a variety of media (hands, objects, etc.) to interact with The projection device interacts.
  • the first polarization beam splitter 420 includes an infrared reflective layer, which can reflect the first polarized light and infrared light, and transmit other light except the first polarized light and infrared light.
  • Fig. 14 is a schematic structural diagram of another projection device provided by the present application. Compared with the projection device 401 shown in FIG. 4, the first polarization beam splitter 1420 shown in FIG. 14 can reflect the first polarized light and transmit the second polarized light, and may not include an infrared reflective layer. Therefore, compared with the projection device 401 shown in FIG. 4, the projection device 1401 shown in FIG.
  • the 14 further includes a first infrared polarization converter 1460 disposed between the first polarization beam splitter 1420 and the imaging lens 1450.
  • the first infrared polarization converter 1460 may be, for example, a first polarization converter.
  • the first polarization converter can convert the incident light of the first polarization converter into the first polarized light.
  • the light incident to the first polarization converter includes the first polarized light and the second polarized light.
  • the first polarization converter can convert the incident second polarized light into the first polarized light and transmit the incident first polarized light. .
  • the first infrared polarization converter 1460 is arranged between the first polarization beam splitter 1420 and the imaging lens 1450, so that the infrared light reaching the first polarization beam splitter 1420 belongs to the first polarization light, Therefore, most of the infrared light from the imaging lens 1450 can be reflected to the image sensor 1440 through the first polarization beam splitter 1420. Therefore, the intensity of infrared light reaching the image sensor 1440 can be higher.
  • FIG. 15 is a schematic structural diagram of a projection device provided by the present application.
  • the projection device 1501 may be the projection device 110 as shown in FIGS. 1 to 3.
  • the light emitted by the projection device 1501 can be projected on the projection area 1502, so that an image can be displayed on the projection area 1502.
  • the projection area 1502 may be the projection area 120 as shown in FIGS. 1 to 3.
  • the projection device 1501 may include a first light processor 1510, a first polarization beam splitter 1521, a second polarization beam splitter 1522, a third polarization beam splitter 1523, a first light valve 1531, a second light valve 1532, and a third light valve 1533 , The light combiner 1570, the imaging lens 1550, and the image sensor 1540.
  • the first light processor 1510 can emit the first polarized visible light.
  • the first polarized visible light belongs to the first polarized light.
  • the first polarized light may be P-polarized light or S-polarized light, for example.
  • the wavelength of the first polarized visible light may be the first wavelength. Therefore, the first polarized visible light may be the first polarized light of the first wavelength.
  • the first optical processor 1510 may also emit first polarized light of the second wavelength and first polarized light of the third wavelength.
  • the first wavelength may be in the range of 625 to 740 nm, for example.
  • the second wavelength may be in the range of 440 to 475 nm, for example.
  • the third wavelength may be in the range of 492 to 577 nm, for example.
  • the light emitted by the first light processor 1510 includes image information related to the first wavelength, image information related to the second wavelength, and image information related to the third wavelength in the projected image. It should be understood that this application does not limit the wavelength ranges of the first wavelength, the second wavelength, and the third wavelength.
  • wavelength can be understood as a wavelength with a value of A, and can also be understood as a wavelength ranging from B to C.
  • the first polarization beam splitter 1521, the second polarization beam splitter 1522, and the third polarization beam splitter 1523 can both reflect the first polarized light and transmit the second polarized light.
  • the polarization direction of the first polarized light is perpendicular to the polarization of the second polarized light. direction.
  • the first polarized light of the first wavelength from the first light processor 1510 may be incident on the first side A of the first polarization beam splitter 1521.
  • the first polarized light of the first wavelength reflected by the first polarizing beam splitter 1521 may vertically enter the first light valve 1531.
  • the first light valve 1531 can collect the incident first polarized light of the first wavelength, convert the incident first polarized light of the first wavelength into the second polarized light of the first wavelength, and emit the second polarized light of the first wavelength vertically. polarized light.
  • the second polarized light of the first wavelength emitted by the first light valve 1531 can be incident on the first side A of the first polarization beam splitter 1521.
  • the second polarized light of the first wavelength from the first light valve 1531 can enter from the first side A of the first polarizing beam splitter 1521 and enter from the first side A of the first polarizing beam splitter 1521.
  • the second side B of the polarization beam splitter 1521 is emitted.
  • the first polarized light of the second wavelength from the first light processor 1510 may be incident to the second polarization beam splitter 1522.
  • the first polarized light of the second wavelength reflected by the second polarizing beam splitter 1522 may enter the second light valve 1532 perpendicularly.
  • the second light valve 1532 can collect the incident first polarized light of the second wavelength, convert the incident first polarized light of the second wavelength into the second polarized light of the second wavelength, and vertically emit the second polarized light of the second wavelength. polarized light.
  • the second polarized light of the second wavelength emitted by the second light valve 1532 can be incident on the second polarization beam splitter 1522. Since the second polarization beam splitter 1522 can transmit the second polarization light, the second polarization light of the second wavelength from the second light valve 1532 can transmit the second polarization beam splitter 1522.
  • the first polarized light of the third wavelength from the first light processor 1510 may be incident to the third polarization beam splitter 1523.
  • the first polarized light of the third wavelength reflected by the third polarizing beam splitter 1523 may be incident on the third light valve 1533 perpendicularly.
  • the third light valve 1533 can collect the incident first polarized light of the third wavelength, convert the incident first polarized light of the third wavelength into the second polarized light of the third wavelength, and emit the second polarized light of the third wavelength vertically. polarized light.
  • the second polarized light of the third wavelength emitted by the third light valve 1533 can be incident on the third polarization beam splitter 1523. Since the third polarization beam splitter 1523 can transmit the second polarization light, the second polarization light of the third wavelength from the third light valve 1533 can transmit the third polarization beam splitter 1523.
  • the light combiner 1570 may combine the light from the first light valve 1531, the second light valve 1532, and the third light valve 1533, and the combined light may be emitted from the light combiner 1570 and reach the imaging lens 1550. Therefore, the information related to the first wavelength in the projected image, the information related to the second wavelength in the projected image, and the information related to the third wavelength in the projected image can be combined to form a complete projected image. Therefore, the light converged by the light combiner 1570 can exit the light combiner 1570 in the target direction.
  • the light combiner 1570 may include a first reflective layer 1571 and a second reflective layer 1572 that are perpendicular and intersecting.
  • the second reflective layer 1572 may divide the first reflective layer 1571 into a first part and a second part, and the area of the first part and the area of the second part may be the same or substantially the same.
  • the first reflective layer 1571 may divide the second reflective layer 1572 into a third part and a fourth part, and the area of the third part and the area of the fourth part may be the same or substantially the same.
  • the first reflective layer 1571 can reflect light of the first wavelength and infrared light.
  • the first reflective layer 1571 may include an infrared reflective layer, for example.
  • the light of the first wavelength from the first light valve 1531 is incident on the first reflective layer 1571 and can be emitted along the target direction.
  • Light whose wavelength is not the first wavelength and light whose wavelength is not infrared light (such as light of the second wavelength and light of the third wavelength) can transmit through the first reflective layer 1571.
  • the light of the first wavelength may be red light
  • the first reflective layer 1571 may reflect red light and infrared light, and transmit green light and blue light.
  • the second reflective layer 1572 can reflect light of the second wavelength.
  • the light from the second light valve 1532 may be incident on the second reflective layer 1572 and emitted along the target direction.
  • Light whose wavelength is not the second wavelength eg, light of the first wavelength, light of the third wavelength, infrared light
  • the second reflective layer 1572 may reflect blue light and transmit red light, infrared light, and green light.
  • the light converged by the light combiner 1570 can be emitted along the target direction.
  • the imaging lens 1550 can image the projected image in the projection area 1502.
  • the light emitted by the light combiner 1570 and containing projection image information may pass through the imaging lens 1550 and be projected in the projection area 1502. Since the light combiner 1570 combines the light emitted by the first light valve 1531, the second light valve 1532, and the third light valve 1533, the first light valve 1531, the second light valve 1532, and the third light valve 1533 are all connected to the projection
  • the area 1502 satisfies the object-image conjugate relationship.
  • the user can observe the projection image projected by the projection device 1501 on the projection area 1502.
  • the user can complete the click gesture, zoom-in gesture, zoom-out gesture, and move gesture as described above by indicating in the projection area 1502, so as to realize the interaction with the projection device 1501.
  • the position indicated by the user on the projected image may be 1503 in FIG. 15.
  • the user can emit infrared light through an infrared remote controller 1560.
  • the projection position of the infrared light in the projection area 1502 may be the user's pointing position 1503 on the projection image.
  • a click gesture can be realized; by sliding the projection position of the infrared light in the projection area 1502, a zooming in gesture, a zooming out gesture, a moving gesture, etc. can be realized.
  • the position 1503 indicated by the user on the projected image can be determined by the infrared light incident on the projection device 1501.
  • the position 1503 indicated by the user on the projection image may form a real image on the side of the imaging lens 1550 away from the projection area 1502. According to the reversibility of light, infrared light may pass through the imaging lens 1550 to the light combiner 1570.
  • the infrared light incident on the projection device 1501 may pass through the imaging lens 1550 and be incident on the light combiner 1570 in a direction opposite to the target direction. Because the first reflective layer 1571 can reflect infrared light, and the second reflective layer 1572 can transmit infrared light; and because the light of the first wavelength from the first polarization beam splitter 1521 is incident on the light combiner 1570, and is emitted along the target direction. Optical device 1570. Therefore, the infrared light may be reflected on the first reflective layer 1571 of the light combiner 1570, and may be incident on the first polarization beam splitter 1521.
  • the first polarization beam splitter 1521 includes an infrared reflective layer, so the first polarization beam splitter 1521 can reflect infrared light.
  • the infrared light reflected by the first polarization beam splitter 1521 may be incident on the image sensor 1540.
  • the image sensor 1540 can collect infrared light from the first polarization beam splitter 1521. Since the reflectivity of the reflective layer in the light combiner 1570 is relatively higher than the transmittance, the infrared light is reflected by the first reflective layer 1571, so that the image sensor 1540 can collect infrared light with relatively higher light intensity.
  • the image processor (not shown in FIG. 15) can determine the user's indicated position on the projection image according to the collection result collected by the image sensor and the collection result collected by the light valve.
  • the projection device 1501 includes a plurality of light valves.
  • a single light valve receives N colors of light in unit time A, so the time for a single light valve to receive each color is A/N.
  • Three light valves are used to receive light of 3 colors, and the time for a single light valve to receive each color is A, which can increase the time for the light valve to receive light, thereby increasing the intensity of light emitted from the projection device.
  • the projection device 1501 may further include a first wave plate or a first polarization interference filter located between the first polarization beam splitter 1521 and the light combiner 1570.
  • the first wave plate can convert the first polarized light into the second polarized light, and can also convert the second polarized light into the first polarized light.
  • the first polarization interference filter can convert the second polarization of the first wavelength into the first polarization of the first wavelength, and can also convert the first polarization of the first wavelength into the second polarization of the first wavelength.
  • the polarization direction of the light of the first wavelength can be changed, thereby increasing the reflectivity of the light combiner 1570 to reflect the light of the first wavelength.
  • the component 1515 shown in FIG. 15 may be a first wave plate.
  • the first wave plate 1515 can convert the second polarized light of the first wavelength from the first polarization beam splitter 1521 into the first polarized light of the first wavelength, and the light converted by the first wave plate 1515 is incident on the light combiner 1570 .
  • the projection device 1501 may further include a second wave plate or a second polarization interference filter located between the second polarization beam splitter 1522 and the light combiner 1570.
  • the second wave plate can convert the first polarized light into the second polarized light, and can also convert the second polarized light into the first polarized light.
  • the second polarization interference filter can convert the second polarization of the second wavelength into the first polarization of the second wavelength, and can also convert the first polarization of the second wavelength into the second polarization of the second wavelength.
  • the polarization direction of the light of the second wavelength can be changed, and the reflectance of the light of the second wavelength of the light combiner 1570 can be improved.
  • the component 1516 shown in FIG. 15 may be a second wave plate.
  • the second wave plate 1516 can convert the second polarized light of the second wavelength from the second polarization beam splitter 1522 into the first polarized light of the second wavelength, and the light converted by the second wave plate 1516 is incident on the light combiner 1570 .
  • the light of the first wavelength from the first light valve 1631, the light of the second wavelength from the second light valve 1632, and the light of the third wavelength from the third light valve 1633 can all be incident on the combined light. ⁇ 1670.
  • the light combiner 1670 shown in FIG. 16 may include a third reflective layer 1671 and a fourth reflective layer 1672 that are perpendicular and intersecting.
  • the fourth reflective layer 1672 may divide the third reflective layer 1671 into a fifth part and a sixth part, and the area of the fifth part and the area of the sixth part may be the same or substantially the same.
  • the third reflective layer 1671 may divide the fourth reflective layer 1672 into a seventh part and an eighth part, and the area of the seventh part and the area of the eighth part may be the same or substantially the same.
  • the third reflective layer 1671 can reflect light with a third wavelength and transmit light with a wavelength other than the third wavelength (such as light with a first wavelength, light with a second wavelength, infrared light).
  • the light of the third wavelength may be green light
  • the third reflective layer 1671 may reflect green light and transmit red light, blue light, and infrared light. Therefore, the light of the third wavelength from the third light valve 1633 may be reflected on the third reflective layer 1671.
  • the fourth reflective layer 1672 can reflect light of the second wavelength and transmit light of a wavelength other than the second wavelength (e.g., light of the first wavelength, light of the third wavelength, infrared light).
  • the light of the second wavelength may be blue light
  • the fourth reflective layer 1672 may reflect blue light and transmit red light, infrared light, and green light. Therefore, the light of the second wavelength from the second light valve 1632 may be reflected on the fourth reflective layer 1672.
  • the light from the first light valve 1631, the second light valve 1632, and the third light valve 1633 can exit the light combiner 1670 along the target direction.
  • the third reflective layer 1671 and the fourth reflective layer 1672 in the infrared light transmission light combiner basically do not affect the processing difficulty of the light combiner 1670, which is beneficial to maintain the production difficulty, production efficiency, and production cost of the projection equipment.
  • the infrared light incident on the projection device 1601 is incident on the light combiner 1670 in a direction opposite to the target direction. Since the third reflective layer 1671 and the fourth reflective layer 1672 can transmit infrared light. According to the reversibility of light, the infrared light incident on the light combiner 1670 in a direction opposite to the target direction can be incident on the second side B of the first polarization beam splitter 1621.
  • the first polarization beam splitter 1621 includes an infrared reflective layer, so the first polarization beam splitter 1621 can reflect infrared light. Therefore, the infrared light reflected by the first polarization beam splitter 1621 can be incident on the image sensor 1640.
  • the image sensor 1640 can collect infrared light from the first polarization beam splitter 1621. Since the projection area 1602 and the image sensor 1640 meet the object-image conjugate relationship, the first light valve 1631, the second light valve 1632, and the third light valve 1633 all meet the object-image conjugate relationship with the projection area 1602. Therefore, the image processor (Not shown in FIG. 16) The user's indicated position on the projection image can be determined according to the collection result collected by the image sensor and the collection result collected by the light valve.
  • the arrangement of optical devices in the projection device can be changed.
  • the infrared light incident on the projection device 1601 transmits the fourth reflective layer 1672 and the third reflective layer 1671 in the light combiner 1670.
  • the infrared light incident on the projection device 1501 may be reflected by the first reflective layer 1571 in the light combiner 1570. Since the reflectance of the reflective layer in the light combiner is relatively higher than the transmittance, the image sensor 1560 in the projection device 1501 can collect infrared light with higher light intensity.
  • the 17 further includes a first infrared polarization converter 1760 provided between the first polarization beam splitter 1721 and the imaging lens 1750.
  • the first infrared polarization converter 1760 may be disposed between the light combiner 1770 and the imaging lens 1750.
  • the infrared light from the imaging lens 1750 may pass through the first infrared polarization converter 1760 and be converted into the first polarization infrared light by the first infrared polarization converter 1760, and the first polarization infrared light belongs to the first polarization light.
  • the first polarized infrared light emitted by the first infrared polarization converter 1760 may be reflected to the first polarization beam splitter 1721 via the first reflection surface 1771 of the light combiner 1770.
  • the first polarized infrared light from the light combiner 1770 may be reflected to the image sensor 1740 through the first polarization beam splitter 1721.
  • the first infrared polarization converter 1760 is arranged between the first polarization beam splitter 1721 and the imaging lens 1750, so that the infrared light reaching the first polarization beam splitter 1721 basically belongs to the first polarization light. Therefore, most of the infrared light from the imaging lens 1750 can be reflected to the image sensor 1740 through the first polarization beam splitter 1721. Therefore, the intensity of infrared light reaching the image sensor 1740 can be higher.
  • the projection device 1701 may further include a first polarization interference filter 1715 located between the first polarization beam splitter 1721 and the light combiner 1770.
  • the first polarization interference filter 1715 can convert the second polarization of the first wavelength into the first polarization of the first wavelength, and can also convert the first polarization of the first wavelength into the second polarization of the first wavelength .
  • the first polarization interference filter 1715 Through the first polarization interference filter 1715, the polarization direction of the light of the first wavelength can be changed, thereby improving the reflectivity of the light combiner 1770 to reflect the light of the first wavelength.
  • the first polarization interference filter 1715 can only change the polarization direction of the light of the first wavelength without changing the polarization direction of other light (such as infrared light), which is beneficial to ensure the intensity of the infrared light emitted by the light combiner 1770.
  • the projection device 1701 may further include a second wave plate or a second polarization interference filter located between the second polarization beam splitter 1722 and the light combiner 1770.
  • the second wave plate can convert the first polarized light into the second polarized light, and can also convert the second polarized light into the first polarized light.
  • the second polarization interference filter can convert the second polarization of the second wavelength into the first polarization of the second wavelength, and can also convert the first polarization of the second wavelength into the second polarization of the second wavelength.
  • the polarization direction of the light of the second wavelength can be changed, thereby increasing the reflectivity of the light combiner 1770 to reflect the light of the second wavelength.
  • the component 1716 shown in FIG. 17 may be a second wave plate.
  • the second wave plate 1716 can convert the second polarized light of the second wavelength from the second polarization beam splitter 1722 into the first polarized light of the second wavelength, and the light converted by the second wave plate 1716 is incident on the light combiner 1770 .
  • the first polarization beam splitter 1621 includes an infrared reflective layer, which can reflect the first polarized light and infrared light, and transmit other light except the first polarized light and infrared light.
  • FIG. 18 is a schematic structural diagram of another projection device provided by the present application. Compared with the projection device 1601 shown in FIG. 16, the first polarization beam splitter 1821 shown in FIG. 18 can reflect the first polarized light and transmit the second polarized light, but may not include an infrared reflective layer. Therefore, compared with the projection device 1601 shown in FIG. 16, the projection device 1801 shown in FIG.
  • the 18 further includes a second polarization converter 1861 disposed between the light combiner 1870 and the imaging lens 1850, and a second polarization converter 1861 disposed between the light combiner 1870 and the imaging lens 1850.
  • the second polarization converter 1861 can convert the incident light of the second polarization converter 1861 into a second polarized light.
  • the light passing through the second polarization converter 1861 includes the first polarization and the second polarization.
  • the second polarization converter 1861 can convert the first polarization into the second polarization and transmit the incident second polarization.
  • the second polarization converter 1861 can convert the infrared light from the imaging lens 1850 into the second polarized infrared light, and the second polarized infrared light belongs to the second polarized light.
  • the second polarization converter 1861 can change the polarization direction of the infrared light, which is beneficial to ensure the intensity of the infrared light emitted by the light combiner 1770.
  • the first infrared polarization converter can be used to convert infrared light incident on the projection device into first polarization infrared light, the first polarization infrared light belongs to the first polarization light, and the first infrared polarization converter emits Infrared light may be incident on the first polarization beam splitter.
  • the second polarization converter 1861 and the first wave plate 1862 are arranged between the first polarization beam splitter 1821 and the imaging lens 1850, so that the infrared light reaching the first polarization beam splitter 1821 is basically It belongs to the first polarized light, so that most of the infrared light from the imaging lens 1850 can be reflected to the image sensor 1840 through the first polarization beam splitter 1821. Therefore, the intensity of infrared light reaching the image sensor 1840 can be higher.
  • the projection device 1901 shown in FIG. 19 may be the projection device 110 shown in FIGS. 1 to 3.
  • the light emitted by the projection device 1901 can be projected on the projection area 1902, so that an image can be displayed on the projection area 1902.
  • the projection area 1902 may be the projection area 120 as shown in FIGS. 1 to 3. It can be understood that the embodiment shown in FIG. 19 is only for helping those skilled in the art to better understand the technical solution of the present application, and is not a limitation to the technical solution of the present application. Benefiting from the guidance presented in the foregoing description and related drawings, those skilled in the art will think of many improvements and other embodiments of the present application. Therefore, it should be understood that the present application is not limited to the specific embodiments disclosed.
  • the projection device 1901 may include a first light processor 1910, a first polarization beam splitter 1921, a second polarization beam splitter 1922, a third polarization beam splitter 1923, a first light valve 1931, a second light valve 1932, and a third light valve 1933.
  • the first light processor 1910 may include a light source 1911, a polarization converter 1918, a beam splitter 1917, a first mirror 1912, a second mirror 1913, and a dichroic mirror 1914.
  • the light source 1911 can provide light for the projection device 1901.
  • the light emitted by the light source 1911 may include image information of the projected image.
  • the light emitted by the light source 1911 may include light of a first wavelength (625-740 nm), light of a second wavelength (440-475 nm), and light of a third wavelength (492-577 nm).
  • the light emitted by the light source 1911 may be natural light (wavelength is 380-780 nm). Natural light usually includes first polarized light and second polarized light, and the polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light.
  • the first polarized light may be, for example, S polarized light
  • the second polarized light may be, for example, P polarized light
  • the first polarized light may be, for example, P polarized light
  • the second polarized light may be, for example, S polarized light.
  • the polarization converter 1918 can convert the light from the light source 1911 into the first polarized light.
  • the light emitted by the polarization converter 1918 may include the first polarized light of the first wavelength, the first polarized light of the second wavelength, and the first polarized light of the third wavelength.
  • the light emitted by the polarization converter 1918 can be mixed with first polarized red light, first polarized blue light, and first polarized green light.
  • the first polarized red light, the first polarized blue light, and the first polarized green light are all mixed. Belongs to the first polarized light.
  • the wavelength of the first polarized red light may be the first wavelength.
  • the wavelength of the first polarized blue light may be the second wavelength.
  • the wavelength of the first polarized green light may be the third wavelength.
  • the light from the polarization converter 1918 can be incident on the beam splitter 1917.
  • the beam splitter 1917 can distinguish the propagation direction of the first part of the light incident on the beam splitter 1917 and the propagation direction of the second part of the light.
  • the first part of light may include light of a first wavelength
  • the second part of light may include light of a second wavelength and light of a third wavelength.
  • the beam splitter 1917 can distinguish two wavelengths of light, so that the two wavelengths of light can continue to propagate along different propagation directions.
  • the first part of light may be incident on the first reflecting mirror 1912.
  • the second part of the light may be incident on the second reflecting mirror 1913.
  • the first polarized red light emitted by the beam splitter 1917 can be incident on the first mirror 1912
  • the first polarized blue light and the first polarized green light emitted by the beam splitter 1917 can be incident on the second mirror 1913.
  • the first reflecting mirror 1912 can reflect the first part of the light from the dichroic mirror 1917.
  • the light reflected by the first mirror 1912 may be incident to the first polarization beam splitter 1921.
  • the first reflecting mirror 1912 can reflect the first polarized red light from the beam splitter 1917; the first polarized red light reflected by the first reflecting mirror 1912 can be incident on the first polarizing beam splitter 1921.
  • the second reflecting mirror 1913 can reflect the second part of the light from the dichroic mirror 1917.
  • the light reflected by the second reflecting mirror 1913 may be incident on the dichroic mirror 1914.
  • the second reflecting mirror 1913 can reflect the first polarized blue light and the first polarized green light from the beam splitter 1917; the first polarized blue light and the first polarized green light reflected by the second reflecting mirror 1913 can be incident on Dichroic mirror 1914.
  • the dichroic mirror 1914 can transmit light in the transmission wavelength range and reflect light in the reflection wavelength range.
  • the transmission wavelength range may include the second wavelength
  • the reflection wavelength range may include the third wavelength.
  • the light transmitted through the dichroic mirror 1914 may be incident to the second polarization beam splitter 1922.
  • the light reflected by the dichroic mirror 1914 may be incident to the third polarization beam splitter 1923.
  • the dichroic mirror 1914 can transmit the first polarized blue light from the second mirror 1913 and reflect the first polarized green light from the second mirror 1913.
  • the first polarized blue light emitted by the dichroic mirror 1914 may be incident on the second polarizing beam splitter 1922.
  • the first polarized green light emitted by the dichroic mirror 1914 may be incident on the third polarization beam splitter 1923.
  • FIG. 20 is a schematic structural diagram of a projection device provided by the present application.
  • the projection device 2001 may be the projection device 110 as shown in FIGS. 1 to 3.
  • the light emitted by the projection device 2001 can be projected on the projection area 2002, so that an image can be displayed on the projection area 2002.
  • the projection area 2002 may be the projection area 120 as shown in FIGS. 1 to 3.
  • the projection device 2001 may include a first optical processor 2010, a first polarization interference filter 2071, a second polarization interference filter 2072, a third polarization interference filter 2073, a first polarization beam splitter 2021, and a second polarization beam splitter. 2022, third polarization beam splitter 2023, fourth polarization beam splitter 2024, first light valve 2031, second light valve 2032, third light valve 2033, first wave plate 2061, second wave plate 2062, imaging lens 2050 , Image sensor 2040.
  • the first light processor 2010 may emit the first polarized light including the image information of the projected image.
  • the first polarized light may be P-polarized light or S-polarized light, for example.
  • the first polarized light may include light of a first wavelength, light of a second wavelength, and light of a third wavelength.
  • the optical processor has been described above through the embodiment shown in FIG. 4, and it is not necessary to repeat it here.
  • the first polarization interference filter 2071 can convert the polarization direction of the light of the first wavelength, for example, can convert the first polarized light of the first wavelength into the second polarized light of the first wavelength.
  • the polarization direction of the second polarized light is perpendicular to the polarization direction of the first polarized light.
  • the first polarization interference filter 2071 may not change the polarization direction of light having a wavelength other than the first wavelength.
  • the first polarization interference filter 2071 does not change the polarization directions of the light of the second wavelength and the light of the third wavelength.
  • the light from the first light processor 2010 may pass through the first polarization interference filter 2071 to reach the second polarization beam splitter 2022.
  • the light emitted from the first polarization interference filter 2071 may include the second polarized light of the first wavelength, the first polarized light of the second wavelength, and the first polarized light of the third wavelength.
  • the second polarization beam splitter 2022 may reflect the first polarized light and transmit the second polarized light.
  • the second polarized light of the first wavelength from the first polarization interference filter 2071 can pass through the second polarization beam splitter 2022 and enter the first wave plate 2061.
  • the first polarized light of the second wavelength and the first polarized light of the third wavelength from the first polarization interference filter 2071 may be reflected to the second polarization interference filter 2072 by the second polarization beam splitter 2022.
  • the first wave plate 2061 can convert the first polarized light into the second polarized light, and can also convert the second polarized light into the first polarized light. Therefore, the first wave plate 2061 can convert the second polarized light of the first wavelength from the second polarization beam splitter 2022 into the first polarized light of the first wavelength.
  • the first polarized light of the first wavelength emitted from the first wave plate 2061 may be incident on the first side A of the first polarization beam splitter 2021.
  • the first polarization beam splitter 2021 may reflect the first polarized light and transmit the second polarized light.
  • the first polarized light of the first wavelength from the first wave plate 2061 may be reflected by the first polarization beam splitter 2021 and enter the first light valve 2031 vertically.
  • the first light valve 2031 can collect the incident first polarized light of the first wavelength, convert the incident first polarized light into a second polarized light, and emit the second polarized light. Therefore, the first light valve 2031 can convert the first polarized light of the first wavelength from the first polarization beam splitter 2021 into the second polarized light of the first wavelength, and vertically emit the second polarized light of the first wavelength.
  • the second polarized light of the first wavelength emitted by the first light valve 2031 may enter from the first side A of the first polarization beam splitter 2021 and exit from the second side B of the first polarization beam splitter 2021.
  • the second polarized light of the first wavelength from the first polarizing beam splitter 2021 may be incident on the second wave plate 2062.
  • the second wave plate 2062 can convert the first polarized light into the second polarized light, and can also convert the second polarized light into the first polarized light. Therefore, the second wave plate 2062 can convert the second polarized light of the first wavelength from the first polarization beam splitter 2021 into the first polarized light of the first wavelength.
  • the first polarized light of the first wavelength emitted from the second wave plate 2062 may be incident on the fourth polarization beam splitter 2024.
  • the second polarization interference filter 2072 can convert the polarization direction of the light of the second wavelength, for example, can convert the first polarized light of the second wavelength into the second polarized light of the second wavelength.
  • the second polarization interference filter 2072 may not change the polarization direction of light having a wavelength other than the second wavelength.
  • the second polarization interference filter 2072 does not change the polarization direction of the light of the third wavelength.
  • the light from the second polarization beam splitter 2022 may pass through the second polarization interference filter 2072 and enter the third polarization beam splitter 2023.
  • the light emitted by the second polarization interference filter 2072 includes the second polarization of the second wavelength and the first polarization of the third wavelength.
  • the third polarization beam splitter 2023 may reflect the first polarized light and transmit the second polarized light.
  • the second polarization light of the second wavelength from the second polarization interference filter 2072 can transmit through the second polarization beam splitter 2022 and enter the second light valve 2032 perpendicularly.
  • the first polarized light of the third wavelength from the second polarization interference filter 2072 may be reflected by the third polarization beam splitter 2023 and enter the third light valve 2033 perpendicularly.
  • the second light valve 2032 can collect the second polarization of the second wavelength from the second polarization beam splitter 2022, and convert the second polarization of the second wavelength from the second polarization beam splitter 2022 into the first polarization of the second wavelength. Light, and emits the first polarized light of the second wavelength. The first polarized light of the second wavelength emitted perpendicularly from the second light valve 2032 may be reflected by the second polarization beam splitter 2022 to the third polarization interference filter 2073.
  • the third light valve 2033 can collect the first polarized light of the third wavelength from the third polarization beam splitter 2023, and convert the first polarized light of the third wavelength from the third polarization beam splitter 2023 into the second polarization of the third wavelength. Light and emit the second polarized light of the third wavelength. The second polarized light of the third wavelength emitted perpendicularly from the third light valve 2033 can pass through the third polarization beam splitter 2023 and be incident on the third polarization interference filter 2073.
  • the second polarized light of the second wavelength and the third polarized light of the third wavelength from the second polarization interference filter 2072 may enter the third polarization beam splitter 2023 along the first direction.
  • the angle between the first direction and the third polarization beam splitter 2023 is C.
  • the second polarized light of the second wavelength may transmit through the third polarization beam splitter 2023 along the first direction.
  • the first polarized light of the third wavelength may be reflected by the third polarization beam splitter 2023 and exit the third polarization beam splitter 2023 in the second direction. Since the exit angle is equal to the incident angle, the angle between the second direction and the third polarization beam splitter 2023 is C.
  • the first polarized light of the second wavelength from the second light valve 2032 enters the third polarization beam splitter 2023 in the opposite direction of the first direction, and may be reflected on the third polarization beam splitter 2023. Since the angle between the second direction and the third polarizing beam splitter 2023 is C, and the exit angle is equal to the incident angle, the first polarized light of the second wavelength reflected by the third polarizing beam splitter 2023 can be along the second direction.
  • the third polarizing beam splitter 2023 is emitted in the opposite direction of.
  • the first polarized light of the third wavelength from the third light valve 2033 may transmit the third polarization beam splitter 2023 in the opposite direction of the second direction.
  • the light of the second wavelength from the second light valve 2032 can be combined with the light of the third wavelength from the third light valve 2033.
  • the third polarization interference filter 2073 can convert the polarization direction of the light of the second wavelength, for example, can convert the first polarized light of the second wavelength into the second polarized light of the second wavelength.
  • the third polarization interference filter 2073 may not change the polarization direction of the light of the second wavelength.
  • the third polarization interference filter 2073 may not change the polarization direction of the light of the third wavelength.
  • the light from the third polarization beam splitter 2023 may pass through the third polarization interference filter 2073 and be incident to the fourth polarization beam splitter 2024.
  • the light emitted by the third polarization interference filter 2073 includes the second polarization of the second wavelength and the second polarization of the third wavelength.
  • the fourth polarization beam splitter 2024 can converge the light from the first light valve 2031, the second light valve 2032, and the third light valve 2033 to the imaging lens 2050.
  • the fourth polarization beam splitter 2024 can reflect the first polarized light and transmit the second polarized light.
  • the light from the second wave plate 2062 and the light from the third polarization interference filter 2073 irradiate the same area of the fourth polarization beam splitter 2024.
  • the first polarized light of the first wavelength from the second wave plate 2062 may be reflected by the fourth polarization beam splitter 2024 and incident on the imaging lens 2050 in the opposite direction of the second direction.
  • the second polarized light of the second wavelength and the second polarized light of the third wavelength from the third polarization interference filter 2073 can be transmitted through the fourth polarization beam splitter 2024 in the opposite direction of the second direction, and be incident on the imaging lens 2050 . It can be seen that the light of the first wavelength, the light of the second wavelength, and the light of the third wavelength emitted by the fourth polarization beam splitter 2024 are parallel to each other.
  • the imaging lens 2050 can image the projection image in the projection area 2002.
  • the light incident on the imaging lens 2050 includes the light emitted by the first light valve 2031, the second light valve 2032, and the third light valve 2033. Therefore, the first light valve 2031, the second light valve 2032, and the third light valve 2033 are all related to the projection The area 2002 satisfies the object-image conjugate relationship.
  • One or more of the first light valve 2031, the second light valve 2032, and the third light valve 2033 may collect a projection image in the projection area 2002.
  • the position 2003 indicated by the user on the projected image can be determined by the infrared light incident on the projection device 2001, so as to realize the interaction between the user and the projection device 2001.
  • the infrared light incident on the projection device 2001 may pass through the imaging lens 2050 and enter the fourth polarization beam splitter 2024 along the second direction. It can be seen that the infrared light incident to the fourth polarization beam splitter 2024 and the light of the first wavelength, the light of the second wavelength, and the light of the third wavelength emitted by the fourth polarization beam splitter 2024 are parallel to each other.
  • the fourth polarization beam splitter 2024 also includes an infrared reflective layer. Therefore, the fourth polarization beam splitter 2024 can reflect infrared light. The infrared light reflected by the fourth polarization beam splitter 2024 may pass through the second wave plate 2062 and enter the second side B of the first polarization beam splitter 2021.
  • the first polarization beam splitter 2021 further includes an infrared reflective layer. Therefore, the first polarization beam splitter 2021 can reflect infrared light. The infrared light reflected by the first polarization beam splitter 2021 may be incident on the image sensor 2040.
  • the projection area 2002 and the image sensor 2040 satisfy the object-image conjugate relationship, and infrared light can be collected by the image sensor 2040 to determine the user's indicated position. Therefore, the image processor (not shown in FIG. 20) can determine the user's indicated position on the projection image according to the collection result collected by the image sensor and the collection result collected by the light valve.
  • both the first polarization beam splitter 2021 and the fourth polarization beam splitter 2024 may include an infrared reflective layer, that is, the first polarization beam splitter 2021 and the fourth polarization beam splitter 2024 may both reflect the first polarization.
  • Light and infrared light transmit light other than the first polarized light and infrared light.
  • FIG. 21 is a schematic structural diagram of another projection device provided by the present application. Compared with the projection device 2001 shown in FIG. 20, the first polarizing beam splitter 2021 and the fourth polarizing beam splitter 2024 shown in FIG. 21 can both reflect the first polarized light and transmit the second polarized light, but neither includes infrared reflection.
  • Floor includes infrared reflection.
  • the projection device 2101 shown in FIG. 21 further includes a first infrared polarization converter 2160 disposed between the fourth polarization beam splitter 2124 and the imaging lens 2150.
  • the example shown in FIG. 21 replaces the second wave plate 2062 in FIG. 20 with the fourth polarization interference filter 2174.
  • the fourth polarization interference filter 2174 can convert the polarization direction of the light of the first wavelength, and the light of the first wavelength does not include infrared light.
  • the second polarized light of the first wavelength from the first polarization beam splitter 2121 can be converted into the first polarized light of the first wavelength.
  • the fourth polarization interference filter 2174 may not change the polarization direction of light having a wavelength other than the first wavelength.
  • the light emitted by the fourth polarization interference filter 2174 may be incident on the fourth polarization beam splitter 2124.
  • the light from the fourth polarization beam splitter 2124 may pass through the first infrared polarization converter 2160 to reach the imaging lens 2150.
  • the first infrared polarization converter 2160 can convert the infrared light from the imaging lens 2150 into the first polarized infrared light, and the first polarized infrared light belongs to the first polarized light.
  • the infrared light emitted by the first infrared polarization converter 2160 may be reflected by the fourth polarization beam splitter 2124 to the fourth polarization interference filter 2174.
  • the fourth polarization interference filter 2174 cannot change the polarization direction of infrared light, so the first polarization infrared light emitted by the fourth polarization beam splitter 2124 can pass through the fourth polarization interference filter 2174 and enter the first polarization beam splitter. 2121.
  • the first polarized infrared light may be reflected to the image sensor 2140 through the first polarizing beam splitter 2121.
  • the first infrared polarization converter 2160 is provided between the fourth polarization beam splitter 2124 and the imaging lens 2150, and between the first polarization beam splitter 2121 and the fourth polarization beam splitter 2124
  • the fourth polarization interference filter 2174 is provided so that the infrared light reaching the first polarization beam splitter 2121 basically belongs to the first polarization light, so that most of the infrared light from the imaging lens 2150 can pass through the fourth polarization beam splitter 2124 and the first polarization beam.
  • the beam splitter 2121 is reflected to the image sensor 2140. Therefore, the intensity of infrared light reaching the image sensor 2140 may be higher.
  • FIG. 22 is a schematic structural diagram of a projection device provided by the present application.
  • the projection device 2201 may be the projection device 110 as shown in FIGS. 1 to 3.
  • the light emitted by the projection device 2201 can be projected on the projection area 2202, so that an image can be displayed on the projection area 2202.
  • the projection area 2202 may be the projection area 122 as shown in FIGS. 1 to 3.
  • the projection device 2201 may include a second light processor 2210, a first polarization beam splitter 2220, a first light valve 2230, a second infrared polarization converter 2260, an imaging lens 2250, and an image sensor 2240.
  • the second light processor 2210 can emit the second polarized visible light.
  • the wavelength of the second polarized visible light may be, for example, 380 nm to 780 nm.
  • the second polarized visible light belongs to the second polarized light.
  • the second polarized light may be S-polarized light or P-polarized light, for example.
  • S-polarized light can mean that the polarization direction of the light is perpendicular to the incident surface.
  • P-polarized light can mean that the polarization direction of light is parallel to the incident surface.
  • the light emitted by the second light processor 2210 contains image information of the projected image.
  • the optical processor has been described above through the embodiment shown in FIG. 4, and it is not necessary to repeat it here.
  • the first polarization beam splitter 2220 may reflect the first polarized light and transmit the second polarized light.
  • the polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light.
  • the second polarized visible light from the second light processor 2210 can transmit through the first polarization beam splitter 2220 and enter the first light valve 2230 perpendicularly.
  • the first light valve 2230 can collect the incident second polarized visible light, convert the incident second polarized visible light into the first polarized visible light, and emit the first polarized visible light.
  • the first polarized visible light belongs to the first polarized light. According to the reversibility of light, the first polarized visible light emitted perpendicularly from the first light valve 2230 can be incident on the first polarization beam splitter 2220.
  • the first polarization beam splitter 2220 can reflect the first polarization light, the first polarization visible light emitted by the first light valve 2230 can be reflected to the second infrared polarization converter 2260 through the first polarization beam splitter 2220.
  • the second infrared polarization converter 2260 may be, for example, a second polarization converter.
  • the second polarization converter can convert the incident light of the second polarization converter into a second polarized light.
  • the light incident to the second polarization converter includes the first polarized light and the second polarized light.
  • the second polarization converter can convert the incident first polarized light into the second polarized light and transmit the incident second polarized light.
  • the second infrared polarization converter 2260 may be located between the first polarization beam splitter 2220 and the imaging lens 2250, for example.
  • the first polarized visible light from the first light valve 2230 may pass through the second infrared polarization converter 2260 and be incident to the imaging lens 2250.
  • the imaging lens 2250 can image the projection image in the projection area 2202.
  • the light emitted by the first light valve 2230 and containing the image information of the projected image can pass through the imaging lens 2250, exit the projection device 2201, and be projected in the projection area 2202. Therefore, the first light valve 2230 and the projection area 2202 satisfy the object-image conjugate relationship.
  • the position 2203 indicated by the user on the projected image can be determined by the infrared light incident on the projection device 2201, so as to realize the interaction between the user and the projection device 2201.
  • the position 2203 indicated by the user on the projection image may form a real image on the side of the imaging lens 2250 away from the projection area 2202.
  • the infrared light incident on the projection device 2201 may pass through the imaging lens 2250 and reach the second infrared polarization converter 2260.
  • the double-dot dashed line represents infrared light
  • the solid line with arrows represents visible light including image information of the projected image.
  • the second infrared polarization converter 2260 can convert the infrared light from the imaging lens 2250 into the second polarized infrared light, and the second polarized infrared light belongs to the second polarized light. According to the reversibility of light, the second polarized infrared light emitted by the second infrared polarization converter 2260 can be incident on the first polarization beam splitter 2220. In addition, since the first polarization beam splitter 2220 can transmit the second polarization light, the infrared light emitted by the second infrared polarization converter 2260 can pass through the first polarization beam splitter 2220 and enter the image sensor 2240. The image sensor 1540 may collect infrared light from the first polarization beam splitter 2220.
  • the projection area 2202 and the image sensor 2240 satisfy the object-image conjugate relationship.
  • the first light valve 2231 and the projection area 2202 satisfy the object-image conjugate relationship. Therefore, the position 2203 indicated by the user on the projection image can be determined according to the signal collected by the image sensor 2240 and the signal collected by the first light valve 2231.
  • FIG. 23 is a schematic structural diagram of a projection device provided by the present application.
  • the projection device 2301 may be the projection device 110 as shown in FIGS. 1 to 3.
  • the light emitted by the projection device 2301 can be projected on the projection area 2302, so that an image can be displayed on the projection area 2302.
  • the projection area 2302 may be the projection area 120 as shown in FIGS. 1 to 3.
  • the projection device 2301 may include a second light processor 2310, a first polarization beam splitter 2321, a second polarization beam splitter 2322, a third polarization beam splitter 2323, a first light valve 2331, a second light valve 2332, a third light valve 2333 , The first polarization converter 2361, the fifth polarization interference filter 2362, the light combiner 2370, the imaging lens 2350, and the image sensor 2340.
  • the second light processor 2310 can emit the second polarized visible light.
  • the second polarized visible light emitted by the second light processor 2310 may be incident on the first polarization beam splitter 2321.
  • the second polarized visible light belongs to the second polarized light.
  • the second polarized light may be, for example, P-polarized light or S-polarized light.
  • the wavelength of the second polarized visible light may be the first wavelength. Therefore, the second polarized visible light may be the second polarized light of the first wavelength.
  • the second optical processor 2310 can also emit second polarized light with a second wavelength and a second polarized light with a third wavelength.
  • the first wavelength may be in the range of 625 to 740 nm, for example.
  • the second wavelength may be in the range of 440 to 475 nm, for example.
  • the third wavelength may be in the range of 492 to 577 nm, for example. Therefore, the light emitted by the second light processor 2310 includes information related to the first wavelength, information related to the second wavelength, and information related to the third wavelength in the projected image. It should be understood that this application does not limit the wavelength ranges of the first wavelength, the second wavelength, and the third wavelength. It should be understood that the optical processor has been described above through the embodiment shown in FIG. 19, and it is not necessary to repeat it here.
  • the first polarization beam splitter 2321, the second polarization beam splitter 2322, and the third polarization beam splitter 2323 can both reflect the first polarization light and transmit the second polarization light, and the polarization direction of the first polarization light is perpendicular to that of the second polarization light. direction.
  • the second polarized light of the first wavelength from the second light processor 2310 can transmit through the first polarization beam splitter 2321 and enter the first light valve 2331 vertically.
  • the first light valve 2331 can collect the incident second polarized light of the first wavelength, convert the incident second polarized light of the first wavelength into the first polarized light of the first wavelength, and emit the first polarized light of the first wavelength.
  • Light According to the reversibility of light, the first polarized light of the first wavelength emitted perpendicularly from the first light valve 2331 can be incident on the first polarization beam splitter 2321. Since the first polarization beam splitter 2321 can reflect the first polarization light, the first polarization light of the first wavelength from the first light valve 2331 can be reflected by the first polarization beam splitter 2321 to the fifth polarization interference filter 2362.
  • the fifth polarization interference filter 2362 can convert the polarization direction of infrared light. For example, it can convert the first polarization infrared light into the second polarization infrared light.
  • the first polarization infrared light belongs to the first polarization light
  • the second polarization infrared light belongs to the second polarization.
  • the light from the first light valve 2331 is mainly visible light, so the light of the first wavelength reflected by the first polarization beam splitter 2321 can pass through the fifth polarization interference filter 2362 and be emitted to the light combiner 2370.
  • the second polarized light of the third wavelength from the second light processor 2310 can transmit through the third polarization beam splitter 2323 and enter the third light valve 2333 perpendicularly.
  • the third light valve 2333 can collect the incident second polarized light of the third wavelength, convert the incident second polarized light of the third wavelength into the first polarized light of the third wavelength, and vertically emit the first polarized light of the third wavelength. polarized light.
  • the first polarized light of the third wavelength emitted by the third light valve 2333 can be incident on the third polarization beam splitter 2323. Since the third polarization beam splitter 2323 can reflect the first polarization light, the first polarization light of the third wavelength from the third light valve 2333 can be reflected to the light combiner 2370 through the third polarization beam splitter 2323.
  • the light combiner 2370 can converge the light from the first light valve 2331, the second light valve 2332, and the third light valve 2333, and the combined light can be emitted from the light combiner 2370 from the light combiner 2370 in a target direction. Therefore, the information related to the first wavelength in the projected image, the information related to the second wavelength in the projected image, and the information related to the third wavelength in the projected image can be combined to form a complete projected image.
  • the light of the first wavelength from the first light valve 2331, the light of the second wavelength from the second light valve 2332, and the light of the third wavelength from the third light valve 2333 may enter the light combiner 2370.
  • the light combiner 2370 may include a first reflective layer 2371 and a second reflective layer 2372 that are perpendicular and intersecting.
  • the second reflective layer 2372 may divide the first reflective layer 2371 into a first part and a second part, and the area of the first part and the area of the second part may be the same or substantially the same.
  • the first reflective layer 2371 may divide the second reflective layer 2372 into a third part and a fourth part, and the area of the third part and the area of the fourth part may be the same or substantially the same.
  • the first reflective layer 2371 can reflect the light of the first wavelength and infrared light.
  • the first reflective layer 2371 may include an infrared reflective layer.
  • the light of the first wavelength from the first light valve 2331 may be reflected by the first reflective layer 2371.
  • the light of the first wavelength reflected by the first reflective layer 2371 may be emitted from the first reflective layer 2371 along the target direction.
  • Light whose wavelength is not the first wavelength and light that is not infrared light (such as light of the second wavelength and light of the third wavelength) can transmit through the first reflective layer 2371.
  • the light of the first wavelength may be red light
  • the first reflective layer 2371 may reflect red light and infrared light, and transmit green light and blue light.
  • the second reflective layer 2372 may reflect light of the second wavelength.
  • the light of the second wavelength from the second light valve 2332 may be reflected by the second reflective layer 2372.
  • the light of the second wavelength reflected by the second reflective layer 2372 can be emitted from the second reflective layer 2372 along the target direction.
  • Light that is not the second wavelength eg, light of the first wavelength, light of the third wavelength, infrared light
  • the light of the second wavelength may be blue light
  • the second reflective layer 2372 may reflect blue light and transmit red light, infrared light, and green light.
  • the light converged by the light combiner 2370 may pass through the first polarization converter 2361 and be incident on the imaging lens 2350.
  • the first polarization converter 2361 may convert the incident light of the first polarization converter 2361 into first polarized light.
  • the imaging lens 2350 can image the projected image in the projection area 2302.
  • the light emitted by the light combiner 2370 and containing projection image information may pass through the imaging lens 2350 and be projected in the projection area 2302. Since the light combiner 2370 combines the light emitted by the first light valve 2331, the second light valve 2332, and the third light valve 2333, the first light valve 2331 and the projection area 2302 meet the object-image conjugate relationship, and the second light valve 2332 and the projection area 2302 satisfy the object-image conjugate relationship, and the third light valve 2333 and the projection area 2302 satisfy the object-image conjugate relationship.
  • the position 2303 indicated by the user on the projected image can be determined by the infrared light incident on the projection device 2301, so as to realize the interaction between the user and the projection device 2301.
  • the position 2303 indicated by the user on the projection image may form a real image on the side of the imaging lens 2350 away from the projection area 2302.
  • the infrared light incident on the projection device 2301 may pass through the imaging lens 2350 to reach the first polarization converter 2361.
  • the first polarization converter 2361 can convert the infrared light from the imaging lens 2350 into the first polarized infrared light, and the first polarized infrared light belongs to the first polarized light. According to the reversibility of light, the infrared light emitted by the first polarization converter 2361 can be incident on the light combiner 2370 in the opposite direction of the target direction.
  • the first reflective layer 2371 can reflect infrared light
  • the second reflective layer 2372 can transmit infrared light; and because the light of the first wavelength from the first polarization beam splitter 2321 exits the light combiner 2370 in the target direction. Therefore, the infrared light incident on the light combiner 2370 can be reflected on the first reflective layer 2371 of the light combiner 2370 and exit the light combiner 2370.
  • the infrared light from the light combiner 2370 may pass through the fifth polarization interference filter 2362 and be incident to the first polarization beam splitter 2321. Since the fifth polarization interference filter 2362 can convert the polarization direction of infrared light, the fifth polarization interference filter 2362 can convert the first polarization infrared light from the light combiner 2370 into the second polarization infrared light. The second polarized infrared light emitted by the polarization interference filter 2362 may be incident on the first polarizing beam splitter 2321, and the second polarized infrared light belongs to the second polarized light.
  • the first polarization beam splitter 2321 may reflect the first polarized light and transmit the second polarized light.
  • the infrared light from the first polarization beam splitter 2321 may transmit through the first polarization beam splitter 2321 and be incident to the image sensor 2340.
  • the image sensor 2340 can collect infrared light from the first polarization beam splitter 2321.
  • the image processor (not shown in FIG. 23) can determine the user's indicated position on the projection image according to the collection result collected by the image sensor and the collection result collected by the light valve.
  • the infrared light incident on the projection device 2301 can be converted into the second polarization infrared light by the first polarization converter 2361, the fifth polarization interference filter 2362, and the fifth polarization interference filter 2362 is emitted.
  • the light of may be incident to the first polarization beam splitter 2321, so the combination of the first polarization converter 2361 and the fifth polarization interference filter 2362 can be regarded as the second infrared polarization converter.
  • the second infrared polarization converter can be used to convert the infrared light incident on the projection device into second polarization infrared light, the second polarization infrared light belongs to the second polarization light, and the infrared light emitted by the second infrared polarization converter Light may be incident to the first polarization beam splitter.
  • the first polarization converter 2361 and the fifth polarization interference filter 2362 are arranged between the first polarization beam splitter 2321 and the imaging lens 2350, so that the light beam reaches the first polarization beam splitter 2321.
  • the infrared light basically belongs to the second polarized light, so that most of the infrared light from the imaging lens 2350 can be transmitted through the first polarization beam splitter 2321 and be incident to the image sensor 2340. Therefore, the intensity of infrared light reaching the image sensor 2340 may be higher.
  • FIG. 24 is a schematic structural diagram of another projection device provided by the present application.
  • the light of the first wavelength from the first light valve 2431, the light of the second wavelength from the second light valve 2432, and the light of the third wavelength from the third light valve 2433 may be incident on the light combiner. 2470.
  • the light combiner 2470 shown in FIG. 24 may include a third reflective layer 2471 and a fourth reflective layer 2472 that are perpendicular and intersecting.
  • the fourth reflective layer 2472 may divide the third reflective layer 2471 into a fifth part and a sixth part, and the area of the fifth part and the area of the sixth part may be the same or substantially the same.
  • the third reflective layer 2471 may divide the fourth reflective layer 2472 into a seventh part and an eighth part, and the area of the seventh part and the area of the eighth part may be the same or substantially the same.
  • the third reflective layer 2471 can reflect light of a third wavelength, and transmit light of a wavelength other than the third wavelength (such as light of the first wavelength, light of the second wavelength, infrared light).
  • the light of the third wavelength may be green light
  • the third reflective layer 2471 may reflect green light and transmit red light, blue light, and infrared light. Therefore, the light of the third wavelength from the third light valve 2433 can be reflected on the third reflective layer 2471 and emitted from the fourth reflective layer 2472 in the target direction.
  • the fourth reflective layer 2472 may reflect light of the second wavelength and transmit light of a wavelength other than the second wavelength (such as light of the first wavelength, light of the third wavelength, infrared light).
  • the light of the second wavelength may be blue light
  • the fourth reflective layer 2472 may reflect blue light and transmit red light, infrared light, and green light. Therefore, the light of the second wavelength from the second light valve 2432 can be reflected on the fourth reflective layer 2472 and emitted from the fourth reflective layer 2472 in the target direction.
  • the light from the first light valve 2431, the second light valve 2432, and the third light valve 2433 can exit the light combiner 2470 along the target direction.
  • the embodiment shown in FIG. 24 replaces the first polarization converter 2361 in FIG. 23 with the second polarization converter 2460, and does not include the fifth polarization converter as shown in FIG.
  • the infrared light incident on the projection device is converted into second polarized infrared light by the second polarization converter 2460, and enters the light combiner 2470 in the opposite direction of the target direction.
  • the second polarized infrared light belongs to the second polarized light. Since the third reflective layer 2471 and the fourth reflective layer 2472 can transmit infrared light. Therefore, the second polarized infrared light from the second polarization converter 2460 can exit the light combiner 2470 in a direction opposite to the target direction. According to the reversibility of light, the second polarized infrared light emitted by the light combiner 2470 can be incident on the first polarized beam splitter 2421. In addition, since the first polarization beam splitter 2421 can transmit the second polarization light, the second polarization infrared light from the light combiner 2470 can transmit the first polarization beam splitter 2421 and enter the image sensor 2440.
  • FIG. 25 is a schematic structural diagram of a projection device provided by the present application.
  • the projection device 2501 may be the projection device 110 as shown in FIGS. 1 to 3.
  • the light emitted by the projection device 2501 can be projected on the projection area 2502, so that an image can be displayed on the projection area 2502.
  • the projection area 2502 may be the projection area 125 as shown in FIGS. 1 to 3.
  • the projection device 2501 may include a second light processor 2510, a first polarization interference filter 2571, a second polarization interference filter 2572, a third polarization interference filter 2573, a fourth polarization interference filter 2574, and a first polarization interference filter 2571.
  • the second light processor 2510 can emit the second polarized light including the first wavelength, the second polarized light with the second wavelength, and the second polarized light with the third wavelength.
  • the second polarized light may be, for example, P-polarized light or S-polarized light.
  • the light of the first wavelength may be red light, for example, the light of the second wavelength may be blue light, and the light of the third wavelength may be green light, for example. That is to say, the light emitted by the second light processor 2510 may include the second polarized red light, the second polarized blue light, and the second polarized green light, wherein the second polarized red light, the second polarized blue light, and the second polarized green light are all Belongs to the second polarized light.
  • the optical processor has been described above through the embodiment shown in FIG. 4, and it is not necessary to repeat it here.
  • the first polarization interference filter 2571 can convert the polarization direction of the light of the first wavelength, for example, can convert the second polarization of the first wavelength into the first polarization of the first wavelength.
  • the polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light.
  • the first polarization interference filter 2571 may not change the polarization direction of light having a wavelength other than the first wavelength.
  • the first polarization interference filter 2571 does not change the polarization directions of the light of the second wavelength and the light of the third wavelength.
  • the light from the second light processor 2510 may pass through the first polarization interference filter 2571 to reach the second polarization beam splitter 2522.
  • the light emitted from the first polarization interference filter 2571 may include the first polarized light of the first wavelength, the second polarized light of the second wavelength, and the second polarized light of the third wavelength.
  • the first wave plate 2561 can convert the first polarized light into the second polarized light, and can also convert the second polarized light into the first polarized light.
  • the first wave plate 2561 can convert the first polarized light of the first wavelength from the second polarization beam splitter 2522 into the second polarized light of the first wavelength.
  • the second polarized light of the first wavelength emitted by the first wave plate 2561 may be incident on the first polarization beam splitter 2521.
  • the first polarization beam splitter 2521 may reflect the first polarized light and transmit the second polarized light.
  • the second polarized light of the first wavelength from the first polarization beam splitter 2521 can transmit through the first polarization beam splitter 2521 and enter the first light valve 2531 perpendicularly.
  • the first light valve 2531 can collect the incident second polarized light of the first wavelength, convert the incident second polarized light of the first wavelength into the first polarized light of the first wavelength, and emit the first polarized light of the first wavelength. Light. According to the reversibility of light, the first polarized light of the first wavelength emitted vertically from the first light valve 2531 may be reflected by the first polarization beam splitter 2521 to the fourth polarization interference filter 2574.
  • the fourth polarization interference filter 2574 can change the polarization direction of the light of the first wavelength, for example, convert the first polarized light of the first wavelength into the second polarized light of the first wavelength.
  • the fourth polarization interference filter 2574 may not change the polarization direction of light having a wavelength other than the first wavelength.
  • the fourth polarization interference filter 2574 does not change the polarization direction of infrared light.
  • the light from the first polarization beam splitter 2521 may pass through the fourth polarization interference filter 2574 and be incident to the fourth polarization beam splitter 2524.
  • the light emitted by the fourth polarization interference filter 2574 may include the second polarization of the first wavelength. Light.
  • the second polarization interference filter 2572 can convert the polarization direction of the light of the second wavelength, for example, can convert the second polarization of the second wavelength into the first polarization of the second wavelength.
  • the second polarization interference filter 2572 may not change the polarization direction of the light of the second wavelength.
  • the second polarization interference filter 2572 does not change the polarization direction of the light of the third wavelength.
  • the light from the second polarization beam splitter 2522 may pass through the second polarization interference filter 2572 and be incident to the third polarization beam splitter 2523.
  • the light emitted by the second polarization interference filter 2572 may include the first polarization of the second wavelength. Light, second polarized light of the third wavelength.
  • the third polarization beam splitter 2523 may reflect the first polarized light and transmit the second polarized light.
  • the first polarized light of the second wavelength from the second polarization interference filter 2572 may be reflected by the second polarization beam splitter 2522 and enter the second light valve 2532 perpendicularly.
  • the second polarized light of the third wavelength from the second polarization interference filter 2572 can pass through the third polarization beam splitter 2523 and enter the third light valve 2533 perpendicularly.
  • the second light valve 2532 can collect the incident first polarized light of the second wavelength, convert the first polarized light of the second wavelength into the second polarized light of the second wavelength, and emit the second polarized light of the second wavelength vertically. Light. According to the reversibility of light, the second polarized light of the second wavelength emitted by the second light valve 2532 can pass through the second polarization beam splitter 2522 and be incident on the third polarization interference filter 2573.
  • the third light valve 2533 can collect the incident second polarized light of the third wavelength, convert the second polarized light of the third wavelength into the first polarized light of the third wavelength, and emit the first polarized light of the third wavelength vertically. Light. According to the reversibility of light, the first polarized light of the third wavelength emitted by the third light valve 2533 may be reflected by the third polarization beam splitter 2523 to the third polarization interference filter 2573.
  • the third polarization interference filter 2573 can convert the polarization direction of the light of the second wavelength, for example, can convert the second polarized light of the second wavelength into the first polarized light of the second wavelength.
  • the third polarization interference filter 2573 may not change the polarization direction of the light of the second wavelength.
  • the third polarization interference filter 2573 may not change the polarization direction of the light of the third wavelength.
  • the second polarized light of the second wavelength and the first polarized light of the third wavelength from the third polarization beam splitter 2523 can pass through the third polarization interference filter 2573 and be incident on the fourth polarization beam splitter 2524.
  • the light emitted by the interference filter 2573 may include the first polarized light of the second wavelength and the first polarized light of the third wavelength.
  • the fourth polarization beam splitter 2524 can converge the light from the first light valve 2531, the second light valve 2532, and the third light valve 2533. Wherein, the fourth polarization beam splitter 2524 can reflect the first polarized light and transmit the second polarized light.
  • the second polarized light of the first wavelength from the fourth polarization interference filter 2574 can pass through the fourth polarization beam splitter 2524 and exit the fourth polarization beam splitter 2524 in the target direction.
  • the first polarized light of the second wavelength and the first polarized light of the third wavelength from the third polarization interference filter 2573 may be reflected by the fourth polarization beam splitter 2524 and exit the fourth polarization beam splitter 2524 along the target direction. Therefore, the light of the first wavelength, the light of the second wavelength, and the light of the third wavelength emitted from the fourth polarization beam splitter 2524 are parallel to each other.
  • the light converged by the fourth polarization beam splitter 2524 may be incident on the second infrared polarization converter 2560.
  • the second infrared polarization converter 2560 can convert the polarization direction of infrared light, and the light emitted by the fourth polarization beam splitter 2524 is mainly visible light. Therefore, the light from the fourth polarization beam splitter 2524 can pass through the second infrared polarization converter 2560 and be incident on the imaging lens 2550.
  • the imaging lens 2550 can image the projected image in the projection area 2502.
  • the light incident on the imaging lens 2550 includes the light emitted by the first light valve 2531, the second light valve 2532, and the third light valve 2533. Therefore, the first light valve 2531, the second light valve 2532, and the third light valve 2533 are all connected to the projection The area 2502 satisfies the object-image conjugate relationship.
  • One or more of the first light valve 2531, the second light valve 2532, and the third light valve 2533 may collect a projection image in the projection area 2502.
  • the position 2503 indicated by the user on the projected image can be determined by the infrared light incident on the projection device 2501, and the interaction between the user and the projection device 2501 can be realized.
  • the position 2503 indicated by the user on the projection image may form a real image on the side of the imaging lens 2550 away from the projection area 2502.
  • the infrared light incident on the projection device 2501 may pass through the imaging lens 2550 to reach the second infrared polarization converter 2560.
  • the second infrared polarization converter 2560 can convert the infrared relationship passing through the second infrared polarization converter 2560 into the second polarized infrared light, and the second polarized infrared light belongs to the second polarized light.
  • the infrared light emitted by the second infrared polarization converter 2560 may be incident on the fourth polarization beam splitter 2524 along the target direction.
  • the infrared light emitted by the second infrared polarization converter 2560 may pass through the fourth polarization beam splitter 2524 and be incident on the third polarization interference filter 2573. Therefore, the light of the first wavelength, the light of the second wavelength, the light of the third wavelength emitted from the fourth polarization beam splitter 2524, and the infrared light that enters the fourth polarization beam splitter 2524 are parallel to each other.
  • the third polarization interference filter 2573 does not convert the polarization direction of the infrared light, so the second polarization infrared light emitted by the third polarization interference filter 2573 can pass through the first polarization beam splitter 2525 and be incident on the image sensor 2540.
  • the image sensor 2540 can collect infrared light from the first polarization beam splitter 2521.
  • the image processor (not shown in FIG. 25) can determine the user's indicated position on the projection image according to the collection result collected by the image sensor and the collection result collected by the light valve.
  • the projection device provided by the embodiment of the present application can perceive the user's operation in the projection area by using the collected infrared light.

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Abstract

Provided are a projection device (401) and a projection interaction method therefor. The projection device (401) comprises a light processor (410), an imaging lens (450), a polarizing light splitter (420), a light valve (430), an image sensor (440) and an image processor. Light emitted by the light processor (410) irradiates the light valve (430) via the polarizing light splitter (420). Image information of a projected image can be collected on the light valve (430). Light emitted from the light valve (430) can pass through the polarizing light splitter (420), penetrate the imaging lens (450), and exit the projection device (401). An infrared ray acted upon by a user in a projection area (402) enters the projection device (401), penetrates the imaging lens (450), and is reflected onto the image sensor (440) via the polarizing light splitter (420). According to the image information collected by the light valve (430) and a message of infrared light collected by the image sensor (440), the image processor determines a position (403) indicated by the user on the projected image by means of the infrared light. By means of the projection interaction method, the projection device (401) can perceive an operation of the user in the projection area (402).

Description

投影设备和投影交互方法Projection equipment and projection interaction method
本申请要求于2019年12月31日提交中国专利局、申请号为201911415627.2、申请名称为“投影设备和投影交互方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims the priority of a Chinese patent application filed with the Chinese Patent Office with the application number 201911415627.2 and the application name "Projection Equipment and Projection Interactive Method" on December 31, 2019, the entire content of which is incorporated into this application by reference.
技术领域Technical field
本申请涉及电子设备领域，并且更具体地，涉及一种投影设备和投影交互方法。This application relates to the field of electronic devices, and more specifically, to a projection device and a projection interaction method.
背景技术Background technique
在演示、公开展示、演讲等场景中，演讲人可以使用投影设备展示图像或视频，方便观看者明了演讲人所表达的内容。例如，在演讲人希望介绍某个历史人物时，可以使用投影设备显示该历史人物的图像，使得观看者可以一目了然地了解演讲人所描述的人物形象。借助投影设备，可以增强演讲人表述的生动性。In scenarios such as presentations, public displays, speeches, etc., speakers can use projection equipment to display images or videos, so that viewers can understand what the speaker is expressing. For example, when the speaker wants to introduce a certain historical figure, the projection device can be used to display the image of the historical figure, so that the viewer can understand the character image described by the speaker at a glance. With the help of projection equipment, the vividness of the speaker's expression can be enhanced.
然而，常见的投影设备仅能够提供演示功能和一些简单的幻灯片切换功能，其应用范围有限。However, common projection devices can only provide presentation functions and some simple slide switching functions, and their application range is limited.
发明内容Summary of the invention
本申请提供一种投影设备和投影交互方法。This application provides a projection device and a projection interaction method.
第一方面，提供了一种投影设备，包括：第一光处理器、成像透镜、第一偏振分光器、第一偏振分光器、第一光阀、图像传感器、图像处理器；其中，所述第一光处理器射出包括投影图像的图像信息的第一偏振可见光；所述第一偏振分光器的第一侧反射来自所述第一光处理器的第一偏振可见光，所述经所述第一侧反射的第一偏振可见光垂直射入所述第一光阀；所述第一光阀采集经所述第一侧反射的第一偏振可见光，所述第一光阀将入射的第一偏振可见光转换为第二偏振可见光，所述第一光阀垂直射出经所述第一光阀转换得到的第二偏振可见光，所述第一光阀射出的第二偏振可见光透射所述第一偏振分光器，所述第一偏振可见光的偏振方向垂直于所述第二偏振可见光的偏振方向；透射所述第一偏振分光器的光穿过所述成像透镜并射出所述投影设备，射出所述投影设备的光在投影区域内形成所述投影图像，用户在所述投影区域内作用的红外光射入所述投影设备并穿过所述成像透镜；来自所述成像透镜的红外光经所述第一偏振分光器的第二侧反射至所述图像处理器，所述图像传感器采集来自所述第一偏振分光器的红外光，所述透射所述第一偏振分光器的第二偏振可见光与射入所述第一偏振分光器的红外光相互平行；所述图像处理器根据所述第一光阀的采集结果及所述图像传感器的采集结果，确定所述用户在所述投影图像上的指示位置。In a first aspect, a projection device is provided, including: a first light processor, an imaging lens, a first polarization beam splitter, a first polarization beam splitter, a first light valve, an image sensor, and an image processor; The first light processor emits the first polarized visible light including the image information of the projected image; the first side of the first polarization beam splitter reflects the first polarized visible light from the first light processor, and the The first polarized visible light reflected on one side vertically enters the first light valve; the first light valve collects the first polarized visible light reflected by the first side, and the first light valve changes the incident first polarized light The visible light is converted into a second polarized visible light, the first light valve vertically emits the second polarized visible light converted by the first light valve, and the second polarized visible light emitted by the first light valve transmits the first polarization splitter The polarization direction of the first polarized visible light is perpendicular to the polarization direction of the second polarized visible light; the light transmitted through the first polarization beam splitter passes through the imaging lens and exits the projection device to emit the projection The light of the device forms the projected image in the projection area, the infrared light applied by the user in the projection area enters the projection device and passes through the imaging lens; the infrared light from the imaging lens passes through the first The second side of a polarizing beam splitter is reflected to the image processor, the image sensor collects infrared light from the first polarizing beam splitter, and the second polarized visible light that transmits the first polarizing beam splitter and the radiation The infrared light entering the first polarization beam splitter is parallel to each other; the image processor determines the user's instruction on the projected image according to the collection result of the first light valve and the collection result of the image sensor position.
第一偏振可见光的波长例如可以是380nm～780nm。The wavelength of the first polarized visible light may be, for example, 380 nm to 780 nm.
可选的，所述第一偏振分光器用于反射所述第一偏振光，透射所述第二偏振光。Optionally, the first polarization beam splitter is used to reflect the first polarized light and transmit the second polarized light.
第一偏振光例如可以是S偏振光或P偏振光。S偏振光可以指光的偏振方向与入射面垂直。P偏振光可以指光的偏振方向平行于入射面。The first polarized light may be S-polarized light or P-polarized light, for example. S-polarized light can mean that the polarization direction of the light is perpendicular to the incident surface. P-polarized light can mean that the polarization direction of the light is parallel to the incident surface.
可选的，射入第一偏振分光器的第一偏振可见光可以与第一光阀平行；来自第一光处理器的第一偏振可见光以45°入射角射入第一偏振分光器，并以45°出射角射出第一偏振分光器。Optionally, the first polarized visible light incident on the first polarizing beam splitter may be parallel to the first light valve; the first polarized visible light from the first light processor is incident on the first polarizing beam splitter at an incident angle of 45°, and The 45° exit angle emits the first polarization beam splitter.
第一光阀例如可以是硅基液晶(liquid crystal on silicon，LCoS)芯片、数字微镜器件(digital micromirror device，DMD)等。The first light valve may be, for example, a liquid crystal on silicon (LCoS) chip, a digital micromirror device (DMD), or the like.
投影设备的投影区域可以是竖直墙壁、水平房顶、桌面、地面、幕布等物体的一部分。The projection area of the projection device can be a part of objects such as vertical walls, horizontal roofs, desktops, ground, and curtains.
投影设备的成像透镜可以与投影区域平行设置或垂直设置。The imaging lens of the projection device can be arranged in parallel or perpendicular to the projection area.
投影在投影区域内的投影图像可以是投影设备存储的投影图像，或者是投影设备接收电子设备发送的投影图像。电子设备例如可以是手机、服务器、手表、路由器、平板电脑、电子阅读器、笔记本电脑、数码相机、或可穿戴设备等。The projection image projected in the projection area may be a projection image stored by a projection device, or a projection image sent by an electronic device received by the projection device. The electronic device can be, for example, a mobile phone, a server, a watch, a router, a tablet computer, an e-reader, a notebook computer, a digital camera, or a wearable device.
第一光阀射出的光穿过投影设备的成像透镜并投影在投影区域内。红外光穿过该成像透镜并照射在图像传感器上。因此第一光阀、图像传感器均与投影区域满足物像共轭关系。根据第一光阀采集到的图像以及图像传感器采集到的图像，可以确定该用户在在该投影图像上的指示位置。The light emitted by the first light valve passes through the imaging lens of the projection device and is projected in the projection area. Infrared light passes through the imaging lens and irradiates the image sensor. Therefore, both the first light valve and the image sensor satisfy the object-image conjugate relationship with the projection area. According to the image collected by the first light valve and the image collected by the image sensor, the user's indicated position on the projected image can be determined.
用户在投影图像上的指示位置可以是红外线遥控器发出的红外光在投影区域上的投射位置。在投影设备包括向投影区域发射红外光的红外线光源的情况下，用户在投影图像上的指示位置还可以是手指(或手持杆件远离手的一端)在投影区域上指示的位置。用户在投影图像上所指示的位置还可以是手持杆件上的红外线光源在投影区域上所指示的位置。The position indicated by the user on the projection image may be the projection position of the infrared light emitted by the infrared remote control on the projection area. When the projection device includes an infrared light source that emits infrared light to the projection area, the user's indicated position on the projected image may also be the position indicated by the finger (or the end of the hand-held rod away from the hand) on the projection area. The position indicated by the user on the projected image may also be the position indicated on the projection area by the infrared light source on the hand-held rod.
在本申请中，通过第一偏振分光器将来自投影区域的红外光反射至图像传感器，因此投影设备可以借助采集的红外光来感知用户在投影区域内的操作。因此，本申请提供的投影设备可以为用户提供更多的操控功能，能够应用在更多的演示场合。In the present application, the infrared light from the projection area is reflected to the image sensor through the first polarization beam splitter, so the projection device can use the collected infrared light to perceive the user's operation in the projection area. Therefore, the projection device provided by the present application can provide users with more control functions and can be used in more presentation occasions.
结合第一方面，在第一方面的某些实现方式中，所述第一偏振分光器包括用于反射红外光的红外反射层。With reference to the first aspect, in some implementations of the first aspect, the first polarization beam splitter includes an infrared reflective layer for reflecting infrared light.
第一偏振分光器可以包括偏振分光层，该偏振分光层用于反射该第一偏振光、透射该第二偏振光。The first polarization beam splitter may include a polarization beam splitting layer for reflecting the first polarized light and transmitting the second polarized light.
在本申请中，在第一偏振分光器上设置红外反射层，使得第一偏振分光器可以具备反射红外光的能力。并且，可以不额外增加投影设备内的元器件数量，使得投影设备的结构更紧凑。In this application, an infrared reflective layer is provided on the first polarization beam splitter, so that the first polarization beam splitter can have the ability to reflect infrared light. In addition, the number of components in the projection device may not be additionally increased, so that the structure of the projection device is more compact.
结合第一方面，在第一方面的某些实现方式中，所述红外反射层位于所述第二侧。With reference to the first aspect, in some implementations of the first aspect, the infrared reflective layer is located on the second side.
在本申请中，在第一偏振分光器的第二侧设置红外反射层，可以减少红外光在第一偏振分光器的第一侧上的反射量，进而可以减少可见光、红外光在第一偏振分光器上反射所产生的偏差，使得投影设备可以精确获知用户在投影图像上指示的位置。In this application, an infrared reflective layer is provided on the second side of the first polarizing beam splitter, which can reduce the amount of infrared light reflected on the first side of the first polarizing beam splitter, thereby reducing visible light and infrared light in the first polarized light. The deviation caused by the reflection on the beam splitter enables the projection device to accurately know the position indicated by the user on the projected image.
结合第一方面，在第一方面的某些实现方式中，所述第一偏振分光器用于反射第一偏振光，并用于透射第二偏振光，所述第一偏振光包括所述第一偏振可见光，所述第二偏振光包括所述第二偏振可见光，所述第一偏振光的偏振方向垂直于所述第二偏振光的偏振方向；所述投影设备还包括：第一红外偏振转换器；其中，所述第一红外偏振转换器将所述 来自所述成像透镜的红外光转换为第一偏振红外光，所述来自所述成像透镜的红外光穿过所述第一红外偏振转换器并入射至所述第一偏振分光器的第二侧，所述第一偏振红外光属于所述第一偏振光。With reference to the first aspect, in some implementations of the first aspect, the first polarization beam splitter is used to reflect a first polarized light and to transmit a second polarized light, and the first polarized light includes the first polarized light. Visible light, the second polarized light includes the second polarized visible light, and the polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light; the projection device further includes: a first infrared polarization converter Wherein, the first infrared polarization converter converts the infrared light from the imaging lens into first polarized infrared light, and the infrared light from the imaging lens passes through the first infrared polarization converter And incident on the second side of the first polarization beam splitter, the first polarized infrared light belongs to the first polarized light.
在本申请中，通过设置第一红外偏振转换器，可以改变红外光的偏振方向，使得在第一偏振分光器本身不具备反射红外光的能力的情况下，可以实现反射红外光的功能。也就是说，在投影设备选择相对传统的偏振分光器的情况下，仍可以感知用户在投影区域内作用的红外线，进而获知用户在投影区域内指示的位置。In this application, by setting the first infrared polarization converter, the polarization direction of infrared light can be changed, so that the function of reflecting infrared light can be realized when the first polarization beam splitter itself does not have the ability to reflect infrared light. In other words, when the projection device selects a relatively traditional polarization beam splitter, it can still sense the infrared rays that the user acts in the projection area, and then know the position indicated by the user in the projection area.
第一红外偏振转换器例如可以是：第一偏振转换器。该第一偏振转换器用于将该第一偏振转换器的入射光转换为第一偏振光。The first infrared polarization converter may be, for example, the first polarization converter. The first polarization converter is used for converting the incident light of the first polarization converter into first polarized light.
第一红外偏振转换器例如可以包括第二偏振转换器、第一波片。该第二偏振转换器将该第二偏振转换器的入射光转换为第二偏振光。第一波片将来自第二偏振转换器的第二偏振光转换为第一偏振光。The first infrared polarization converter may include, for example, a second polarization converter and a first wave plate. The second polarization converter converts the incident light of the second polarization converter into a second polarized light. The first wave plate converts the second polarized light from the second polarization converter into the first polarized light.
可选的，所述第一波片用于将入射的第一偏振光转换为第二偏振光，用于将入射的第二偏振光转换为第一偏振光。Optionally, the first wave plate is used to convert incident first polarized light into second polarized light, and used to convert incident second polarized light into first polarized light.
可选的，第一红外偏振转换器可以设置在成像透镜远离投影区域的一侧。Optionally, the first infrared polarization converter may be arranged on a side of the imaging lens away from the projection area.
结合第一方面，在第一方面的某些实现方式中，所述第一光处理器射出包括所述图像信息的光，所述第一光处理器射出的光包括第一波长的第一偏振光、第二波长的第一偏振光、第三波长的第一偏振光，所述第一偏振可见光为所述第一波长的第一偏振光；所述第一光阀射出的所述第二偏振可见光为所述第一波长的第二偏振光，所述第一偏振光的偏振方向垂直于所述第二偏振光的偏振方向；所述投影设备还包括：第二偏振分光器、第三偏振分光器、第二光阀、第三光阀、合光器；其中，所述第二偏振分光器反射来自所述第一光处理器的所述第二波长的第一偏振光，经所述第二偏振分光器反射的所述第二波长的第一偏振光垂直射入所述第二光阀；所述第二光阀采集经所述第二偏振分光器反射的所述第二波长的第一偏振光，所述第二光阀将入射的所述第二波长的第一偏振光转换为所述第二波长的第二偏振光，所述第二光阀垂直射出经所述第二光阀转换得到的所述第二波长的第二偏振光，所述第二光阀射出的所述第二波长的第二偏振光透射所述第二偏振分光器；所述第三偏振分光器反射来自所述第一光处理器的所述第三波长的第一偏振光，经所述第三偏振分光器反射的所述第三波长的第一偏振光垂直射入所述第三光阀；所述第三光阀采集经所述第三偏振分光器反射的所述第三波长的第一偏振光，所述第三光阀将入射的所述第三波长的第一偏振光转换为所述第三波长的第二偏振光，所述第三光阀垂直射出经所述第三光阀转换得到的所述第三波长的第二偏振光，所述第三光阀射出的所述第三波长的第二偏振光透射所述第三偏振分光器；所述合光器汇合来自所述第一光阀的所述第一波长的光、来自所述第二光阀的所述第二波长的光、来自所述第三光阀的所述第三波长的光，经所述合光器汇合的光沿目标方向射出所述合光器，所述经所述合光器汇合的光入射至所述成像透镜，所述来自所述成像透镜的红外光沿所述目标方向的相反方向入射至所述合光器，所述第一波长的光包括所述第一波长的第一偏振光和/或所述第一波长的第二偏振光，所述第二波长的光包括所述第二波长的第一偏振光和/或所述第二波长的第二偏振光，所述第三波长的光包括所述第三波长的第一偏振光和/所述或第三波长的第二偏振光；所述合光器包括：垂直且相交的第一反射层、第二反射层，所述第二反射层将所述第一反射层 划分为面积相同的两个部分，所述第一反射层将所述第二反射层划分为面积相同的两个部分；其中，所述第一反射层反射所述来自所述第一光阀的所述第一波长的光以及来自所述成像透镜的红外光，所述第一反射层透射来自所述第二光阀的所述第二波长的光以及所述来自所述第三光阀的所述第三波长的光，所述来自所述第一光阀的所述第一波长的光沿所述目标方向自所述第一反射层射出，所述来自所述成像透镜的红外光沿所述目标方向的相反方向入射至所述第一反射层；所述第二反射层反射所述来自所述第二光阀的所述第二波长的光，所述第二反射层透射所述来自所述第一光阀的所述第一波长的光、所述来自所述第三光阀的所述第三波长的光以及所述来自成像透镜的红外光。With reference to the first aspect, in some implementations of the first aspect, the first light processor emits light including the image information, and the light emitted by the first light processor includes a first polarization of a first wavelength Light, the first polarized light of the second wavelength, the first polarized light of the third wavelength, the first polarized visible light is the first polarized light of the first wavelength; the second polarized light emitted by the first light valve The polarized visible light is the second polarized light of the first wavelength, and the polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light; the projection device further includes: a second polarization beam splitter, a third Polarization beam splitter, second light valve, third light valve, and light combiner; wherein the second polarization beam splitter reflects the first polarized light of the second wavelength from the first optical processor, and passes through the The first polarized light of the second wavelength reflected by the second polarization beam splitter vertically enters the second light valve; the second light valve collects the second wavelength reflected by the second polarization beam splitter The second light valve converts the incident first polarized light of the second wavelength into the second polarized light of the second wavelength, and the second light valve emits vertically through the first polarized light The second polarized light of the second wavelength converted by the two light valves, the second polarized light of the second wavelength emitted by the second light valve is transmitted through the second polarization beam splitter; the third polarization beam splitter The device reflects the first polarized light of the third wavelength from the first optical processor, and the first polarized light of the third wavelength reflected by the third polarization beam splitter vertically enters the third light The third light valve collects the first polarized light of the third wavelength reflected by the third polarization beam splitter, and the third light valve converts the incident first polarized light of the third wavelength Is the second polarized light of the third wavelength, the third light valve vertically emits the second polarized light of the third wavelength converted by the third light valve, and all the light emitted by the third light valve The second polarized light of the third wavelength transmits the third polarization beam splitter; the light combiner combines the light of the first wavelength from the first light valve and the light from the second light valve. The light of the second wavelength, the light of the third wavelength from the third light valve, the light that is combined by the light combiner exits the light combiner in the target direction, and the light is combined by the light combiner The light of the first wavelength is incident on the imaging lens, the infrared light from the imaging lens is incident on the light combiner in a direction opposite to the target direction, and the light of the first wavelength includes the first wavelength of the first wavelength. One polarized light and/or the second polarized light of the first wavelength, the light of the second wavelength includes the first polarized light of the second wavelength and/or the second polarized light of the second wavelength, so The light of the third wavelength includes the first polarized light of the third wavelength and/or the second polarized light of the third wavelength; the light combiner includes: a first reflective layer and a second reflective layer that are perpendicular and intersecting The second reflective layer divides the first reflective layer into two parts with the same area, and the first reflective layer divides the second reflective layer into two parts with the same area; wherein, the The first reflective layer reflects the The light of the first wavelength and the infrared light from the imaging lens, the first reflective layer transmits the light of the second wavelength from the second light valve and the light from the third light valve The light of the third wavelength, the light of the first wavelength from the first light valve is emitted from the first reflective layer along the target direction, and the infrared light from the imaging lens is along the The direction opposite to the target direction is incident on the first reflective layer; the second reflective layer reflects the light of the second wavelength from the second light valve, and the second reflective layer transmits the light from the second light valve. The light of the first wavelength of the first light valve, the light of the third wavelength from the third light valve, and the infrared light from the imaging lens.
在本申请中，通过使用三个光阀分别接收3种颜色的光，可以增大单个光阀接收光的时间，从而增大射出投影设备的光的强度，因此第一光阀可以采集到质量较高的图像，图像处理器根据高质量的图像感知用户在投影图像内的操作，因此有利于提高图像处理器感知用户操作的精度。In this application, by using three light valves to receive light of 3 colors, the time for a single light valve to receive light can be increased, thereby increasing the intensity of light emitted from the projection device, so the first light valve can collect the quality With a higher image, the image processor perceives the user's operations in the projected image according to the high-quality image, which is beneficial to improve the accuracy of the image processor's perception of user operations.
结合第一方面，在第一方面的某些实现方式中，所述投影设备还包括：第一偏振干涉滤光片；其中，所述第一偏振干涉滤光片用于将所述第一波长的第二偏振光转换为所述第一波长的第一偏振光，来自所述第一偏振分光器的光穿过所述第一偏振干涉滤光片入射至所述合光器。With reference to the first aspect, in some implementations of the first aspect, the projection device further includes: a first polarization interference filter; wherein the first polarization interference filter is used to convert the first wavelength The second polarized light of is converted into the first polarized light of the first wavelength, and the light from the first polarization beam splitter passes through the first polarization interference filter and enters the light combiner.
结合第一方面，在第一方面的某些实现方式中，所述投影设备还包括：第一波片；其中，所述第一波片用于将第一偏振光转换为第二偏振光，以及将第二偏振光转换为第一偏振光，来自所述第一偏振分光器的光穿过所述第一波片并入射至所述合光器。With reference to the first aspect, in some implementations of the first aspect, the projection device further includes: a first wave plate; wherein, the first wave plate is used to convert the first polarized light into the second polarized light, And converting the second polarized light into the first polarized light, and the light from the first polarizing beam splitter passes through the first wave plate and is incident on the light combiner.
在本申请中，通过第一波片或第一偏振干涉滤光片，可以改变入射至合光器的第一波长的光的偏振方向，进而提高第一反射层反射第一波长的光的反射率，即提高合光器射出光线的强度。In this application, through the first wave plate or the first polarization interference filter, the polarization direction of the light of the first wavelength incident on the light combiner can be changed, thereby improving the reflection of the light of the first wavelength by the first reflective layer. Rate, that is, increase the intensity of light emitted by the light combiner.
可选的，所述根据所述图像传感器的采集结果以及所述第一光阀的采集结果，确定所述用户在所述投影图像上的指示位置，包括：所述根据所述图像传感器的采集结果、所述第一光阀的采集结果、所述第二光阀的采集结果、所述第三光阀的采集结果，确定所述用户在所述投影图像上的指示位置。Optionally, the determining the indication position of the user on the projection image according to the acquisition result of the image sensor and the acquisition result of the first light valve includes: the acquisition according to the image sensor As a result, the collection result of the first light valve, the collection result of the second light valve, and the collection result of the third light valve determine the indicated position of the user on the projection image.
结合第一方面，在第一方面的某些实现方式中，所述第一反射层包括用于反射红外光的红外反射层。With reference to the first aspect, in some implementations of the first aspect, the first reflective layer includes an infrared reflective layer for reflecting infrared light.
在本申请中，在第一反射层设置红外反射层，使得第一反射层可以具备反射红外光的能力，有利于保证照射在图像传感器上的红外光的强度，有利于确保用户交互的精准性。In this application, an infrared reflective layer is provided on the first reflective layer, so that the first reflective layer can reflect infrared light, which helps to ensure the intensity of the infrared light irradiated on the image sensor, and helps ensure the accuracy of user interaction .
可选的，红外反射层可以位于第一反射层靠近第一偏振分光器的一侧。Optionally, the infrared reflective layer may be located on the side of the first reflective layer close to the first polarization beam splitter.
结合第一方面，在第一方面的某些实现方式中，所述第一光处理器射出包括所述图像信息的光，所述第一光处理器射出的光包括第一波长的第一偏振光、第二波长的第一偏振光、第三波长的第一偏振光，所述第一偏振可见光为所述第一波长的第一偏振光；所述第一光阀射出的所述第二偏振可见光为所述第一波长的第二偏振光，所述第一偏振光的偏振方向垂直于所述第二偏振光的偏振方向；所述投影设备还包括：第二偏振分光器、第三偏振分光器、第二光阀、第三光阀、合光器；其中，所述第二偏振分光器反射来自所述第一光处理器的所述第二波长的第一偏振光，经所述第二偏振分光器反射的所述第二波长的第一偏振光垂直射入所述第二光阀；所述第二光阀采集经所述第二偏振分光器反射的所述第 二波长的第一偏振光，所述第二光阀将入射的所述第二波长的第一偏振光转换为所述第二波长的第二偏振光，所述第二光阀垂直射出经所述第二光阀转换得到的所述第二波长的第二偏振光，所述第二光阀射出的所述第二波长的第二偏振光透射所述第二偏振分光器；所述第三偏振分光器反射来自所述第一光处理器的所述第三波长的第一偏振光，经所述第三偏振分光器反射的所述第三波长的第一偏振光垂直射入所述第三光阀；所述第三光阀采集经所述第三偏振分光器反射的所述第三波长的第一偏振光，所述第三光阀将入射的所述第三波长的第一偏振光转换为所述第三波长的第二偏振光，所述第三光阀垂直射出经所述第三光阀转换得到的所述第三波长的第二偏振光，所述第三光阀射出的所述第三波长的第二偏振光透射所述第三偏振分光器；所述合光器汇合来自所述第一光阀的所述第一波长的光、来自所述第二光阀的所述第二波长的光、来自所述第三光阀的所述第三波长的光，经所述合光器汇合的光沿目标方向射出所述合光器，所述经所述合光器汇合的光入射至所述成像透镜，所述来自所述成像透镜的红外光沿所述目标方向的相反方向入射至所述合光器，所述第一波长的光包括所述第一波长的第一偏振光和/或所述第一波长的第二偏振光，所述第二波长的光包括所述第二波长的第一偏振光和/或所述第二波长的第二偏振光，所述第三波长的光包括所述第三波长的第一偏振光和/所述或第三波长的第二偏振光；所述合光器包括：垂直且相交的第三反射层以及第四反射层，所述第四反射层将所述第三反射层划分为面积相同的两个部分，所述第三反射层将所述第四反射层划分为面积相同的两个部分，其中，所述第三反射层透射所述来自所述第一光阀的所述第一波长的光、所述来自所述第二光阀的所述第二波长的光以及所述来自所述成像透镜的红外光，所述第三反射层反射所述来自所述第三光阀的所述第三波长的光，所述第四反射层透射所述来自所述第一光阀的所述第一波长的光、所述来自所述第三光阀的所述第三波长的光以及所述来自所述成像透镜的红外光，所述第四反射层反射所述来自所述第二光阀的所述第二波长的光。With reference to the first aspect, in some implementations of the first aspect, the first light processor emits light including the image information, and the light emitted by the first light processor includes a first polarization of a first wavelength Light, the first polarized light of the second wavelength, the first polarized light of the third wavelength, the first polarized visible light is the first polarized light of the first wavelength; the second polarized light emitted by the first light valve The polarized visible light is the second polarized light of the first wavelength, and the polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light; the projection device further includes: a second polarization beam splitter, a third Polarization beam splitter, second light valve, third light valve, and light combiner; wherein the second polarization beam splitter reflects the first polarized light of the second wavelength from the first optical processor, and passes through the The first polarized light of the second wavelength reflected by the second polarization beam splitter vertically enters the second light valve; the second light valve collects the second wavelength reflected by the second polarization beam splitter The second light valve converts the incident first polarized light of the second wavelength into the second polarized light of the second wavelength, and the second light valve emits vertically through the first polarized light The second polarized light of the second wavelength converted by the two light valves, the second polarized light of the second wavelength emitted by the second light valve is transmitted through the second polarization beam splitter; the third polarization beam splitter The device reflects the first polarized light of the third wavelength from the first optical processor, and the first polarized light of the third wavelength reflected by the third polarization beam splitter vertically enters the third light The third light valve collects the first polarized light of the third wavelength reflected by the third polarization beam splitter, and the third light valve converts the incident first polarized light of the third wavelength Is the second polarized light of the third wavelength, the third light valve vertically emits the second polarized light of the third wavelength converted by the third light valve, and all the light emitted by the third light valve The second polarized light of the third wavelength transmits the third polarization beam splitter; the light combiner combines the light of the first wavelength from the first light valve and the light from the second light valve. The light of the second wavelength, the light of the third wavelength from the third light valve, the light that is combined by the light combiner exits the light combiner in the target direction, and the light is combined by the light combiner The light of the first wavelength is incident on the imaging lens, the infrared light from the imaging lens is incident on the light combiner in a direction opposite to the target direction, and the light of the first wavelength includes the first wavelength of the first wavelength. One polarized light and/or the second polarized light of the first wavelength, the light of the second wavelength includes the first polarized light of the second wavelength and/or the second polarized light of the second wavelength, so The light of the third wavelength includes the first polarized light of the third wavelength and/or the second polarized light of the third wavelength; the light combiner includes: a vertical and intersecting third reflection layer and a fourth reflection The fourth reflective layer divides the third reflective layer into two parts with the same area, and the third reflective layer divides the fourth reflective layer into two parts with the same area. The third reflective layer transmits the all from the first light valve The light of the first wavelength, the light of the second wavelength from the second light valve, and the infrared light from the imaging lens, and the third reflective layer reflects the light from the third The light of the third wavelength of the light valve, the fourth reflective layer transmits the light of the first wavelength from the first light valve, the light of the third wavelength from the third light valve Wavelength of light and the infrared light from the imaging lens, the fourth reflective layer reflects the light of the second wavelength from the second light valve.
在本申请中，通过使用三个光阀分别接收3种颜色的光，可以增大单个光阀接收光的时间，从而增大射出投影设备的光的强度，因此第一光阀可以采集到质量较高的图像，图像处理器根据高质量的图像感知用户在投影图像内的操作，因此有利于提高图像处理器感知用户操作的精度。In this application, by using three light valves to receive light of 3 colors, the time for a single light valve to receive light can be increased, thereby increasing the intensity of light emitted from the projection device, so the first light valve can collect the quality With a higher image, the image processor perceives the user's operation in the projected image according to the high-quality image, which is beneficial to improve the accuracy of the image processor's perception of the user's operation.
结合第一方面，在第一方面的某些实现方式中，所述第一光处理器射出包括所述图像信息的光，所述第一光处理器射出的光包括第一波长的第一偏振光、第二波长的第一偏振光以及第三波长的第一偏振光，所述第一偏振可见光为所述第一波长的第一偏振光；所述第一光阀射出的所述第二偏振可见光为所述第一波长的第二偏振光，所述第一偏振光的偏振方向垂直于所述第二偏振光的偏振方向；所述投影设备还包括：第一偏振干涉滤光片、第二偏振分光器、第一波片、第二波片、第二偏振干涉滤光片、第三偏振分光器、第二光阀、第三光阀、第三偏振干涉滤光片、第四偏振分光器；其中，所述第一光处理器射出的光穿过所述第一偏振干涉滤光片入射至所述第二偏振分光器，所述第一偏振干涉滤光片将入射的所述第一波长的第一偏振光转换为所述第一波长的第二偏振光；所述第二偏振分光器透射来自所述第一偏振干涉滤光片的所述第一波长的第二偏振光，所述第二偏振分光器反射来自所述第一偏振干涉滤光片的所述第二波长的第一偏振光、所述第三波长的第一偏振光，透射所述第二偏振分光器的所述第一波长的第二偏振光入射至所述第一波片，经所述第二偏振分光器反射的所述第二波长的第一偏振光、所述第三波长的第一偏振光入射至 所述第二偏振干涉滤光片；所述第一波片将来自所述第二偏振分光器的所述第一波长的第二偏振光转换为所述第一波长的第一偏振光，所述第一波片射出经所述第一波片转换得到的所述第一波长的第一偏振光，所述第一波片射出的所述第一波长的第一偏振光经所述第一侧反射至所述第一光阀；所述第二波片将透射所述第一偏振分光器的所述第一波长的第二偏振光转换为所述第一波长的第一偏振光，所述第二波片射出经所述第二波片转换得到的所述第一波长的第一偏振光，所述第二波片射出的所述第一波长的第一偏振光入射至所述第四偏振分光器；来自所述第二偏振分光器的所述第二波长的光、所述第三波长的光穿过所述第二偏振干涉滤光片入射至所述第三偏振分光器，所述第二偏振干涉滤光片将入射的所述第二波长的第一偏振光转换为所述第二波长的第二偏振光；所述第三偏振分光器透射来自所述第二偏振干涉滤光片的所述第二波长的第二偏振光，所述第三偏振分光器反射来自所述第二偏振干涉滤光片的所述第三波长的第一偏振光，透射所述第三偏振分光器的所述第二波长的第二偏振光垂直射入所述第二光阀，经所述第三偏振分光器反射的所述第三波长的第一偏振光垂直射入所述第三光阀；所述第二光阀采集透射所述第三偏振分光器的所述第二波长的第二偏振光，所述第二光阀将入射的所述第二波长的第二偏振光转换为所述第二波长的第一偏振光，所述第二光阀垂直射出经所述第二光阀转换得到的所述第二波长的第一偏振光，所述第二光阀射出的所述第二波长的第一偏振光经所述第三偏振分光器反射至所述第三偏振干涉滤光片；所述第三光阀采集经所述第三偏振分光器反射的所述第三波长的第一偏振光，所述第三光阀将入射的所述第三波长的第一偏振光转换为所述第三波长的第二偏振光，所述第三光阀垂直射出经所述第三光阀转换得到的所述第三波长的第二偏振光，所述第三光阀射出的所述第三波长的第二偏振光透射所述第三偏振分光器，透射所述第三偏振分光器的第三波长的第二偏振光入射至所述第三偏振干涉滤光片；来自所述第三偏振分光器的所述第二波长的光、所述第三波长的光穿过所述第三偏振干涉滤光片入射至第四偏振分光器，所述第三偏振干涉滤光片将来自所述第三偏振分光器的所述第二波长的第一偏振光转换为所述第二波长的第二偏振光；所述第四偏振分光器反射来自所述第二波片的所述第一波长的第一偏振光，所述第四偏振分光器透射来自所述第三偏振干涉滤光片的所述第二波长的第二偏振光、所述第三波长的第二偏振光，经所述第四偏振分光器反射的所述第一波长的第一偏振光入射至所述成像透镜，透射所述第四偏振分光器的所述第二波长的第二偏振光、所述第三波长的第二偏振光入射至所述成像透镜，来自所述成像透镜的红外光经所述第四偏振分光器反射至所述第二侧，所述第四偏振分光器射出的所述第一波长的第一偏振光、所述第二波长的第二偏振光、所述第三波长的第二偏振光以及射入所述第四偏振分光器的红外光相互平行。With reference to the first aspect, in some implementations of the first aspect, the first light processor emits light including the image information, and the light emitted by the first light processor includes a first polarization of a first wavelength Light, first polarized light of the second wavelength, and first polarized light of the third wavelength, the first polarized visible light is the first polarized light of the first wavelength; the second light emitted by the first light valve The polarized visible light is the second polarized light of the first wavelength, and the polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light; the projection device further includes: a first polarization interference filter, Second polarization beam splitter, first wave plate, second wave plate, second polarization interference filter, third polarization beam splitter, second light valve, third light valve, third polarization interference filter, fourth Polarization beam splitter; wherein the light emitted by the first optical processor passes through the first polarization interference filter and enters the second polarization beam splitter, and the first polarization interference filter will incident The first polarization of the first wavelength is converted into the second polarization of the first wavelength; the second polarization beam splitter transmits the second polarization of the first wavelength from the first polarization interference filter The second polarization beam splitter reflects the first polarization light of the second wavelength and the first polarization light of the third wavelength from the first polarization interference filter, and transmits the second polarization beam splitter The second polarized light of the first wavelength is incident on the first wave plate, and the first polarized light of the second wavelength and the first polarized light of the third wavelength are reflected by the second polarization beam splitter. Polarized light is incident on the second polarization interference filter; the first wave plate converts the second polarized light of the first wavelength from the second polarization beam splitter into the first wavelength of the first wavelength Polarized light, the first wave plate emits the first polarized light of the first wavelength converted by the first wave plate, and the first polarized light of the first wavelength emitted by the first wave plate is transmitted through The first side is reflected to the first light valve; the second wave plate converts the second polarized light of the first wavelength transmitted through the first polarization beam splitter into the first polarized light of the first wavelength Polarized light, the second wave plate emits the first polarized light of the first wavelength converted by the second wave plate, and the first polarized light of the first wavelength emitted by the second wave plate is incident To the fourth polarization beam splitter; the light of the second wavelength and the light of the third wavelength from the second polarization beam splitter pass through the second polarization interference filter and enter the third A polarization beam splitter, the second polarization interference filter converts the incident first polarized light of the second wavelength into the second polarized light of the second wavelength; the third polarization beam splitter transmits from the The second polarized light of the second wavelength of the second polarization interference filter, the third polarization beam splitter reflects the first polarized light of the third wavelength from the second polarization interference filter, and transmits The second polarized light of the second wavelength of the third polarization beam splitter vertically enters the second light valve, and the first polarized light of the third wavelength reflected by the third polarization beam splitter vertically shoots Into the third light valve; the second light valve Collect the second polarized light of the second wavelength that transmits the third polarization beam splitter, and the second light valve converts the incident second polarized light of the second wavelength into the first polarized light of the second wavelength. Polarized light, the second light valve vertically emits the first polarized light of the second wavelength converted by the second light valve, and the first polarized light of the second wavelength emitted by the second light valve Reflected by the third polarization beam splitter to the third polarization interference filter; The third light valve collects the first polarized light of the third wavelength reflected by the third polarization beam splitter, the The third light valve converts the incident first polarized light of the third wavelength into the second polarized light of the third wavelength, and the third light valve vertically emits the converted light by the third light valve. The second polarized light of the third wavelength, the second polarized light of the third wavelength emitted by the third light valve transmits the third polarizing beam splitter, and the second polarized light of the third wavelength transmitted by the third polarizing beam splitter Two-polarized light is incident on the third polarization interference filter; the light of the second wavelength and the light of the third wavelength from the third polarization beam splitter pass through the third polarization interference filter Incident on the fourth polarization beam splitter, the third polarization interference filter converts the first polarization light of the second wavelength from the third polarization beam splitter into the second polarization light of the second wavelength; The fourth polarizing beam splitter reflects the first polarized light of the first wavelength from the second wave plate, and the fourth polarizing beam splitter transmits the second polarized light from the third polarization interference filter. The second polarized light of the wavelength, the second polarized light of the third wavelength, the first polarized light of the first wavelength reflected by the fourth polarization beam splitter enters the imaging lens, and transmits the fourth polarized light. The second polarized light of the second wavelength and the second polarized light of the third wavelength of the polarization beam splitter are incident on the imaging lens, and the infrared light from the imaging lens is reflected to the imaging lens by the fourth polarization beam splitter. On the second side, the first polarized light of the first wavelength, the second polarized light of the second wavelength, the second polarized light of the third wavelength and the incident light emitted by the fourth polarization beam splitter The infrared light of the fourth polarization beam splitter is parallel to each other.
在本申请中，通过使用三个光阀分别接收3种颜色的光，可以增大单个光阀接收光的时间，从而增大射出投影设备的光的强度，因此第一光阀可以采集到质量较高的图像，图像处理器根据高质量的图像感知用户在投影图像内的操作，因此有利于提高图像处理器感知用户操作的精度。第四偏振分光器汇合第一波长的光、第二波长的光以及第三波长的光，其中，第二波长的光以及第三波长的光可以沿同一方向射入第四偏振分光器，因此可以获得结构更加紧凑的投影设备，有利于投影设备的小型化。在第四偏振分光器、第一偏振分光器上均设置红外反射层，使得第四偏振分光器、第一偏振分光器均可以具备反射红外光的能力，因此可以不额外增加投影设备内的元器件数量，更有利于投影设备的结构紧凑性。In this application, by using three light valves to receive light of 3 colors, the time for a single light valve to receive light can be increased, thereby increasing the intensity of light emitted from the projection device, so the first light valve can collect the quality With a higher image, the image processor perceives the user's operation in the projected image according to the high-quality image, which is beneficial to improve the accuracy of the image processor's perception of the user's operation. The fourth polarization beam splitter combines the light of the first wavelength, the light of the second wavelength and the light of the third wavelength, wherein the light of the second wavelength and the light of the third wavelength can enter the fourth polarization beam splitter in the same direction, so A projection device with a more compact structure can be obtained, which is beneficial to the miniaturization of the projection device. Both the fourth polarization beam splitter and the first polarization beam splitter are provided with an infrared reflective layer, so that the fourth polarization beam splitter and the first polarization beam splitter can both have the ability to reflect infrared light, so there is no need to add additional elements in the projection device. The number of components is more conducive to the compactness of the projection equipment.
结合第一方面，在第一方面的某些实现方式中，所述第一光处理器射出包括所述图像信息的光，所述第一光处理器射出的光包括第一波长的第一偏振光、第二波长的第一偏振光以及第三波长的第一偏振光，所述第一偏振可见光为所述第一波长的第一偏振光；所述第一光阀射出的第二偏振可见光为所述第一波长的第二偏振光，所述第一偏振光的偏振方向垂直于所述第二偏振光的偏振方向；所述投影设备还包括：第一偏振干涉滤光片、第二偏振分光器、第二偏振干涉滤光片、第三偏振分光器、第二光阀、第三光阀、第三偏振干涉滤光片、第一波片、第四偏振干涉滤光片、第四偏振分光器；其中，所述第一光处理器射出的光穿过所述第一偏振干涉滤光片入射至所述第二偏振分光器，所述第一偏振干涉滤光片将入射的所述第一波长的第一偏振光转换为所述第一波长的第二偏振光；所述第二偏振分光器反射来自所述第一偏振干涉滤光片的所述第二波长的第一偏振光以及所述第三波长的第一偏振光，所述第二偏振分光器透射来自所述第一偏振干涉滤光片的所述第一波长的第二偏振光，经所述第二偏振分光器反射的所述第二波长的第一偏振光、所述第三波长的第一偏振光入射至所述第二偏振干涉滤光片，透射所述第二偏振分光器的所述第一波长的第二偏振光入射至所述第一波片；来自所述第二偏振分光器的所述第二波长的光、所述第三波长的光穿过所述第二偏振干涉滤光片入射至所述第三偏振分光器，所述第二偏振干涉滤光片将入射的所述第二波长的第一偏振光转换为所述第二波长的第二偏振光；所述第三偏振分光器透射来自所述第二偏振干涉滤光片的所述第二波长的第二偏振光，所述第三偏振分光器反射来自所述第二偏振干涉滤光片的所述第三波长的第一偏振光，透射所述第三偏振分光器的所述第二波长的第二偏振光垂直射入所述第二光阀，经所述第三偏振分光器反射的所述第三波长的第一偏振光垂直射入所述第三光阀；所述第二光阀采集透射所述第三偏振分光器的所述第二波长的第二偏振光，所述第二光阀将入射的所述第二波长的第二偏振光转换为所述第二波长的第一偏振光，所述第二光阀垂直射出经所述第二光阀转换得到的所述第二波长的第一偏振光，所述第二光阀射出的所述第二波长的第一偏振光经所述第三偏振分光器反射至所述第三偏振干涉滤光片；所述第三光阀采集经所述第三偏振分光器反射的所述第三波长的第一偏振光，所述第三光阀将入射的所述第三波长的第一偏振光转换为所述第三波长的第二偏振光，所述第三光阀垂直射出经所述第三光阀转换得到的所述第三波长的第二偏振光，所述第三光阀射出的所述第三波长的第二偏振光透射所述第三偏振分光器，透射所述第三偏振分光器的第三波长的第二偏振光入射至所述第三偏振干涉滤光片；来自所述第三偏振分光器的所述第二波长的光、所述第三波长的光穿过所述第三偏振干涉滤光片入射至所述第四偏振分光器，所述第三偏振干涉滤光片将来自所述第三偏振分光器的所述第二波长的第一偏振光转换为所述第二波长的第二偏振光；所述第一波片将来自所述第二偏振分光器的所述第一波长的第二偏振光转换为所述第一波长的第一偏振光，所述第一波片射出经所述第一波片转换得到的所述第一波长的第一偏振光，所述第一波片射出的所述第一波长的第一偏振光经所述第一侧反射至所述第一光阀；所述第四偏振干涉滤光片将来自所述第一光阀的所述第一波长的第二偏振光转换为所述第一波长的第一偏振光，所述第四偏振干涉滤光片射出经所述第四偏振干涉滤光片转换得到的所述第一波长的第一偏振光，所述第四偏振干涉滤光片射出的所述第一波长的第一偏振光入射至所述第四偏振分光器；所述第四偏振分光器反射来自所述第四偏振干涉滤光片的所述第一波长的第一偏振光，所述第四偏振分光器透射来自所述第三偏振干涉滤光片的所述第 二波长的第二偏振光、所述第三波长的第二偏振光，经所述第四偏振分光器反射的所述第一波长的第一偏振光入射至所述成像透镜，透射所述第四偏振分光器的所述第二波长的第二偏振光、所述第三波长的第二偏振光入射至所述成像透镜，来自所述第一红外偏振转换器的红外光经所述第四偏振分光器反射至所述第四偏振干涉滤光片，来自所述第四偏振分光器的红外光穿过所述第四偏振干涉滤光片入射至所述第二侧，所述第四偏振分光器射出的所述第一波长的第一偏振光、所述第二波长的第二偏振光、所述第三波长的第二偏振光以及射入所述第四偏振分光器的红外光相互平行。With reference to the first aspect, in some implementations of the first aspect, the first light processor emits light including the image information, and the light emitted by the first light processor includes a first polarization of a first wavelength Light, first polarized light of the second wavelength, and first polarized light of the third wavelength, the first polarized visible light is the first polarized light of the first wavelength; the second polarized visible light emitted by the first light valve Is the second polarized light of the first wavelength, the polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light; the projection device further includes: a first polarization interference filter, a second Polarization beam splitter, second polarization interference filter, third polarization beam splitter, second light valve, third light valve, third polarization interference filter, first wave plate, fourth polarization interference filter, second Four-polarization beam splitter; wherein the light emitted by the first optical processor passes through the first polarization interference filter and enters the second polarization beam splitter, and the first polarization interference filter will be incident on the The first polarization of the first wavelength is converted into the second polarization of the first wavelength; the second polarization beam splitter reflects the first polarization of the second wavelength from the first polarization interference filter Polarized light and the first polarized light of the third wavelength, the second polarization beam splitter transmits the second polarized light of the first wavelength from the first polarization interference filter, and passes through the second polarization The first polarized light of the second wavelength and the first polarized light of the third wavelength reflected by the beam splitter are incident on the second polarization interference filter, and transmit the first polarized light of the second polarization beam splitter. The second polarized light of the wavelength is incident on the first wave plate; the light of the second wavelength and the light of the third wavelength from the second polarization beam splitter pass through the second polarization interference filter Incident to the third polarization beam splitter, the second polarization interference filter converts the incident first polarization of the second wavelength into the second polarization of the second wavelength; the third polarization The beam splitter transmits the second polarized light of the second wavelength from the second polarization interference filter, and the third polarization beam splitter reflects the light of the third wavelength from the second polarization interference filter. The first polarized light, the second polarized light of the second wavelength transmitted through the third polarizing beam splitter is vertically incident on the second light valve, and the light of the third wavelength reflected by the third polarizing beam splitter The first polarized light vertically enters the third light valve; the second light valve collects the second polarized light of the second wavelength transmitted through the third polarization beam splitter, and the second light valve will incident The second polarization of the second wavelength is converted into the first polarization of the second wavelength, and the second light valve vertically emits the first polarization of the second wavelength converted by the second light valve Light, the first polarized light of the second wavelength emitted by the second light valve is reflected by the third polarization beam splitter to the third polarization interference filter; the third light valve is collected by the third polarization interference filter; The first polarized light of the third wavelength reflected by the third polarization beam splitter, the third light valve converts the incident first polarized light of the third wavelength into the second polarized light of the third wavelength, The third light valve emits vertically The second polarized light of the third wavelength converted by the third light valve, the second polarized light of the third wavelength emitted by the third light valve transmits the third polarization beam splitter, and transmits all the light The second polarized light of the third wavelength of the third polarization beam splitter is incident on the third polarization interference filter; the light of the second wavelength, the light of the third wavelength from the third polarization beam splitter Light passes through the third polarization interference filter and enters the fourth polarization beam splitter. The third polarization interference filter polarizes the first polarization of the second wavelength from the third polarization beam splitter. Light is converted into the second polarized light of the second wavelength; the first wave plate converts the second polarized light of the first wavelength from the second polarization beam splitter into the first polarized light of the first wavelength Polarized light, the first wave plate emits the first polarized light of the first wavelength converted by the first wave plate, and the first polarized light of the first wavelength emitted by the first wave plate is transmitted through The first side is reflected to the first light valve; the fourth polarization interference filter converts the second polarized light of the first wavelength from the first light valve into the light of the first wavelength The first polarized light, the fourth polarization interference filter emits the first polarized light of the first wavelength converted by the fourth polarization interference filter, and the fourth polarization interference filter emits The first polarized light of the first wavelength is incident on the fourth polarization beam splitter; the fourth polarization beam splitter reflects the first polarized light of the first wavelength from the fourth polarization interference filter, The fourth polarization beam splitter transmits the second polarization light of the second wavelength and the second polarization light of the third wavelength from the third polarization interference filter, and is reflected by the fourth polarization beam splitter The first polarized light of the first wavelength is incident on the imaging lens, the second polarized light of the second wavelength that transmits the fourth polarization beam splitter, and the second polarized light of the third wavelength is incident on In the imaging lens, the infrared light from the first infrared polarization converter is reflected by the fourth polarization beam splitter to the fourth polarization interference filter, and the infrared light from the fourth polarization beam splitter passes through The fourth polarization interference filter is incident on the second side, and the first polarized light of the first wavelength, the second polarized light of the second wavelength, and the The second polarized light of the third wavelength and the infrared light incident on the fourth polarizing beam splitter are parallel to each other.
在本申请中，通过使用三个光阀分别接收3种颜色的光，可以增大单个光阀接收光的时间，从而增大射出投影设备的光的强度，因此第一光阀可以采集到质量较高的图像，图像处理器根据高质量的图像感知用户在投影图像内的操作，因此有利于提高图像处理器感知用户操作的精度。第四偏振分光器汇合第一波长的光、第二波长的光以及第三波长的光，其中，第二波长的光以及第三波长的光可以沿同一方向射入第四偏振分光器，因此可以获得结构更加紧凑的投影设备，有利于投影设备的小型化。通过第一红外偏振转换器，可以改变红外光的偏振方向，使得第四偏振分光器、第一偏振分光器在均不具备反射红外光的能力的情况下，均可以实现反射红外光的功能。也就是说，在投影设备选择相对传统的偏振分光器的情况下，仍可以感知用户在投影区域内作用的红外线，进而获知用户在投影区域内指示的位置。In this application, by using three light valves to receive light of 3 colors, the time for a single light valve to receive light can be increased, thereby increasing the intensity of light emitted from the projection device, so the first light valve can collect the quality With a higher image, the image processor perceives the user's operation in the projected image according to the high-quality image, which is beneficial to improve the accuracy of the image processor's perception of the user's operation. The fourth polarization beam splitter combines the light of the first wavelength, the light of the second wavelength and the light of the third wavelength, wherein the light of the second wavelength and the light of the third wavelength can enter the fourth polarization beam splitter in the same direction, so A projection device with a more compact structure can be obtained, which is beneficial to the miniaturization of the projection device. Through the first infrared polarization converter, the polarization direction of infrared light can be changed, so that the fourth polarization beam splitter and the first polarization beam splitter can realize the function of reflecting infrared light when neither has the ability to reflect infrared light. In other words, when the projection device selects a relatively traditional polarization beam splitter, it can still sense the infrared rays that the user acts in the projection area, and then know the position indicated by the user in the projection area.
结合第一方面，在第一方面的某些实现方式中，所述第一波长为625～740nm，所述第二波长为440～475nm，所述第三波长为492～577nm。With reference to the first aspect, in some implementations of the first aspect, the first wavelength is 625-740 nm, the second wavelength is 440-475 nm, and the third wavelength is 492-577 nm.
在本申请中，将第一波长设置为红光、第二波长设置为蓝光、第三波长设置为绿光，有利于匹配图像的标准格式(如红-绿-蓝(red-green-blue，RGB)格式等)。另外，第一波长设置为与红外光靠近的波长，且红外光沿与红光的部分光路相反的方向传播，有利于提高照射在图像传感器上的红外光的强度，因此有利于提高图像处理器感知用户操作的精度。In this application, the first wavelength is set to red light, the second wavelength is set to blue light, and the third wavelength is set to green light, which is beneficial to match the standard format of the image (such as red-green-blue (red-green-blue, RGB) format, etc.). In addition, the first wavelength is set to a wavelength close to the infrared light, and the infrared light propagates in the direction opposite to the part of the red light path, which is beneficial to increase the intensity of the infrared light irradiated on the image sensor, and therefore is beneficial to improve the image processor Perceive the accuracy of user operations.
结合第一方面，在第一方面的某些实现方式中，所述用户在所述投影区域内作用的红外光包括以下的任一种：由红外线遥控器发出的、经所述投影区域反射的红外光；杆件上的红外线光源发出的红外光；投影区域以及手指反射的红外光；投影区域以及杆件反射的红外光。With reference to the first aspect, in some implementations of the first aspect, the infrared light applied by the user in the projection area includes any one of the following: emitted by an infrared remote control and reflected by the projection area Infrared light; infrared light emitted by the infrared light source on the rod; infrared light reflected by the projection area and fingers; infrared light reflected by the projection area and the rod.
在本申请中，投影设备可以识别多种形式的红外光，因此用户可以灵活的选择与投影设备交互的媒介，有利于实现投影交互的灵活性。In this application, the projection device can recognize various forms of infrared light, so the user can flexibly choose the medium for interaction with the projection device, which is beneficial to realize the flexibility of projection interaction.
第二方面，提供了一种投影设备，包括：第二光处理器、成像透镜、第一偏振分光器、第一偏振分光器、第一光阀、第二红外偏振转换器、图像传感器、图像处理器；其中，所述第二光处理器射出包括投影图像的图像信息的第二偏振可见光，所述第二偏振可见光属于第二偏振光；所述第一偏振分光器透射来自所述第二光处理器的第二偏振可见光，透射所述第一偏振分光器的第二偏振可见光垂直入射至所述第一光阀；所述第一光阀采集所述透射所述第一偏振分光器的第二偏振可见光，所述第一光阀将入射的第二偏振可见光转换为第一偏振可见光，所述第一光阀垂直射出经所述第一光阀转换得到的第一偏振可见光，所述第一光阀射出的第一偏振可见光经所述第一偏振分光器反射，所述第一偏振可见光属于第一偏振光，所述第一偏振光的偏振方向垂直于所述第二偏振光的偏振方向；经所述第 一偏振分光器反射的第一偏振可见光穿过所述第二红外偏振转换器、所述成像透镜并射出所述投影设备，射出所述投影设备的光在投影区域内形成所述投影图像，用户在所述投影区域内作用的红外光射入所述投影设备，射入所述投影设备的红外光穿过所述成像透镜并入射至所述第二红外偏振转换器；所述第二红外偏振转换器将来自所述成像透镜的红外光转换为第二偏振红外光，经所述第二红外偏振转换器转换得到的第二偏振红外光属于所述第二偏振光，所述第二红外偏振转换器射出经所述第二红外偏振转换器转换得到的第二偏振红外光，所述第二红外偏振转换器射出的第二偏振红外光透射所述第一偏振分光器，射出所述第一偏振分光器的第二偏振可见光平行于射入所述第一偏振分光器的红外光；透射所述第一偏振分光器的红外光入射至所述图像传感器，所述图像传感器采集来自所述第一偏振分光器的红外光；图像处理器，根据所述图像传感器的采集结果以及所述第一光阀的采集结果，确定所述用户在所述投影图像上的指示位置。In a second aspect, a projection device is provided, including: a second light processor, an imaging lens, a first polarization beam splitter, a first polarization beam splitter, a first light valve, a second infrared polarization converter, an image sensor, an image Processor; wherein, the second light processor emits second polarized visible light including image information of the projected image, the second polarized visible light belongs to the second polarized light; the first polarization beam splitter transmits from the second The second polarized visible light of the optical processor, the second polarized visible light transmitted through the first polarization beam splitter is incident perpendicularly to the first light valve; the first light valve collects the second polarized visible light transmitted through the first polarization beam splitter The second polarized visible light, the first light valve converts the incident second polarized visible light into the first polarized visible light, the first light valve vertically emits the first polarized visible light converted by the first light valve, the The first polarized visible light emitted by the first light valve is reflected by the first polarization beam splitter, the first polarized visible light belongs to the first polarized light, and the polarization direction of the first polarized light is perpendicular to that of the second polarized light. Polarization direction; the first polarized visible light reflected by the first polarization beam splitter passes through the second infrared polarization converter, the imaging lens and exits the projection device, and the light exiting the projection device is in the projection area The projection image is formed, the infrared light applied by the user in the projection area is incident on the projection device, and the infrared light incident on the projection device passes through the imaging lens and is incident on the second infrared polarization converter The second infrared polarization converter converts infrared light from the imaging lens into a second polarized infrared light, and the second polarized infrared light converted by the second infrared polarization converter belongs to the second polarized light The second infrared polarization converter emits second polarized infrared light converted by the second infrared polarization converter, and the second polarized infrared light emitted by the second infrared polarization converter transmits the first polarization splitter The second polarized visible light emitted from the first polarizing beam splitter is parallel to the infrared light entering the first polarizing beam splitter; the infrared light transmitted through the first polarizing beam splitter is incident on the image sensor, the An image sensor collects infrared light from the first polarization beam splitter; an image processor, according to the collection result of the image sensor and the collection result of the first light valve, determines the user's instruction on the projected image position.
第二偏振可见光的波长例如可以是380nm～780nm。The wavelength of the second polarized visible light may be, for example, 380 nm to 780 nm.
第二偏振光例如可以是S偏振光或P偏振光。S偏振光可以指光的偏振方向与入射面垂直。P偏振光可以指光的偏振方向平行于入射面。The second polarized light may be S-polarized light or P-polarized light, for example. S-polarized light can mean that the polarization direction of the light is perpendicular to the incident surface. P-polarized light can mean that the polarization direction of the light is parallel to the incident surface.
第二红外偏振转换器例如可以是第二偏振转换器。该第二偏振转换器可以将该第二偏振转换器的入射光转换为第二偏振光。The second infrared polarization converter may be, for example, a second polarization converter. The second polarization converter can convert the incident light of the second polarization converter into a second polarized light.
第二红外偏振转换器例如可以包括第二偏振转换器、第一波片。该第二偏振转换器可以将该第二偏振转换器的入射光转换为第二偏振光。波片可以将第二偏振光转换为第一偏振光，还可以将第一偏振光转换为第二偏振光。The second infrared polarization converter may include, for example, a second polarization converter and a first wave plate. The second polarization converter can convert the incident light of the second polarization converter into a second polarized light. The wave plate can convert the second polarized light into the first polarized light, and can also convert the first polarized light into the second polarized light.
第二红外偏振转换器可以位于投影设备的成像透镜远离投影区域的一侧。The second infrared polarization converter may be located on a side of the imaging lens of the projection device away from the projection area.
在本申请中，通过第一偏振分光器将来自投影区域的红外光反射至图像传感器，因此投影设备可以借助采集的红外光来感知用户在投影区域内的操作，因此本申请提供的投影设备可以为用户提供更多的操控功能，能够应用在更多的演示场合。通过设置第二红外偏振转换器，可以改变红外光的偏振方向，使得在第一偏振分光器本身不具备反射红外光的能力的情况下，可以实现反射红外光的功能。也就是说，在投影设备选择相对传统的偏振分光器的情况下，仍可以感知用户在投影区域内作用的红外线，进而获知用户在投影区域内指示的位置。In this application, the infrared light from the projection area is reflected to the image sensor through the first polarization beam splitter, so the projection device can use the collected infrared light to perceive the user's operation in the projection area, so the projection device provided in this application can Provide users with more control functions, which can be used in more demonstration occasions. By providing the second infrared polarization converter, the polarization direction of the infrared light can be changed, so that the function of reflecting infrared light can be realized when the first polarization beam splitter itself does not have the ability to reflect infrared light. In other words, when the projection device selects a relatively traditional polarization beam splitter, it can still sense the infrared rays that the user acts in the projection area, and then know the position indicated by the user in the projection area.
结合第二方面，在第二方面的某些实现方式中，所述第二光处理器射出包括所述图像信息的光，所述第二光处理器射出的光包括第一波长的第二偏振光、第二波长的第二偏振光、第三波长的第二偏振光，所述第二偏振可见光为所述第一波长的第二偏振光；所述第一光阀射出的第一偏振可见光为所述第一波长的第一偏振光；所述投影设备还包括：第二偏振分光器、第三偏振分光器、第二光阀、第三光阀、合光器；其中，所述第二偏振分光器透射来自所述第二光处理器的所述第二波长的第二偏振光，透射所述第二偏振分光器的所述第二波长的第二偏振光垂直射入所述第二光阀；所述第二光阀采集透射所述第二偏振分光器的所述第二波长的第二偏振光，所述第二光阀将入射的所述第二波长的第二偏振光转换为所述第二波长的第一偏振光，所述第二光阀垂直射出经所述第二光阀转换得到的所述第二波长的第一偏振光，所述第二光阀射出的所述第二波长的第一偏振光经所述第二偏振分光器反射；所述第三偏振分光器透射来自所述第二光处理器的所述第三波长的第二偏振光，透射所述第三偏振分光器的所述第三波长的第二偏振光垂直射入所述第三光阀；所 述第三光阀采集透射所述第三偏振分光器的所述第三波长的第二偏振光，所述第三光阀将入射的所述第三波长的第二偏振光转换为所述第三波长的第一偏振光，所述第三光阀垂直射出经所述第二光阀转换得到的所述第三波长的第一偏振光，所述第三光阀射出的所述第三波长的第一偏振光经所述第三偏振分光器反射；所述合光器汇合来自所述第一光阀的所述第一波长的光、来自所述第二光阀的所述第二波长的光、来自所述第三光阀的所述第三波长的光，经所述合光器汇合的光沿目标方向射出所述合光器，经所述合光器汇合的光穿过所述第二红外偏振转换器入射至所述成像透镜，所述来自所述第二红外偏振转换器的红外光沿所述目标方向的相反方向入射至所述合光器，所述第一波长的光包括所述第一波长的第一偏振光和/或所述第一波长的第二偏振光，所述第二波长的光包括所述第二波长的第一偏振光和/或所述第二波长的第二偏振光，所述第三波长的光包括所述第三波长的第一偏振光和/所述或第三波长的第二偏振光；所述合光器包括：垂直且相交的第一反射层以及第二反射层，所述第二反射层将所述第一反射层划分为面积相同的两个部分，所述第一反射层将所述第二反射层划分为面积相同的两个部分，其中，所述第一反射层反射所述来自所述第一光阀的所述第一波长的光以及所述来自所述第二红外偏振转换器的红外光，所述第一反射层透射所述来自所述第二光阀的所述第二波长的光以及所述来自所述第三光阀的所述第三波长的光，所述来自所述第一光阀的所述第一波长的光沿所述目标方向自所述第一反射层射出，所述来自所述第二红外偏振转换器的红外光沿所述目标方向的相反方向入射至所述第一反射层，所述第二反射层反射所述来自所述第二光阀的所述第二波长的光，所述第二反射层透射所述来自所述第一光阀的所述第一波长的光、所述来自所述第三光阀的所述第三波长的光以及所述来自所述第二红外偏振转换器的红外光。With reference to the second aspect, in some implementations of the second aspect, the second optical processor emits light including the image information, and the light emitted by the second optical processor includes a second polarization of a first wavelength Light, second polarized light of the second wavelength, second polarized light of the third wavelength, the second polarized visible light is the second polarized light of the first wavelength; the first polarized visible light emitted by the first light valve Is the first polarized light of the first wavelength; the projection device further includes: a second polarization beam splitter, a third polarization beam splitter, a second light valve, a third light valve, and a light combiner; wherein, the first polarization beam splitter The two-polarization beam splitter transmits the second polarized light of the second wavelength from the second optical processor, and transmits the second polarized light of the second wavelength of the second polarization beam splitter to vertically enter the first Two light valves; the second light valve collects the second polarized light of the second wavelength transmitted through the second polarization beam splitter, and the second light valve will incident the second polarized light of the second wavelength Converted into the first polarized light of the second wavelength, the second light valve vertically emits the first polarized light of the second wavelength converted by the second light valve, and the second light valve emits The first polarized light of the second wavelength is reflected by the second polarization beam splitter; the third polarization beam splitter transmits the second polarized light of the third wavelength from the second optical processor, and transmits all The second polarized light of the third wavelength of the third polarization beam splitter vertically enters the third light valve; the third light valve collects the first light of the third wavelength that transmits the third polarization beam splitter Two-polarized light, the third light valve converts the incident second polarized light of the third wavelength into the first polarized light of the third wavelength, and the third light valve vertically emits the second light The first polarized light of the third wavelength obtained by the valve conversion, the first polarized light of the third wavelength emitted by the third light valve is reflected by the third polarization beam splitter; the light combiner converges from The light of the first wavelength of the first light valve, the light of the second wavelength from the second light valve, the light of the third wavelength from the third light valve, pass through the The light combined by the light combiner exits the light combiner along the target direction, the light combined by the light combiner enters the imaging lens through the second infrared polarization converter, and the light from the second infrared The infrared light of the polarization converter is incident on the light combiner in a direction opposite to the target direction, and the light of the first wavelength includes the first polarized light of the first wavelength and/or the first polarized light of the first wavelength. Two-polarized light, the light of the second wavelength includes the first polarized light of the second wavelength and/or the second polarized light of the second wavelength, and the light of the third wavelength includes the light of the third wavelength. The first polarized light and/or the second polarized light of the third wavelength; the light combiner includes: a first reflective layer and a second reflective layer that are perpendicular and intersecting, and the second reflective layer connects the first The reflective layer is divided into two parts with the same area, the first reflective layer divides the second reflective layer into two parts with the same area, wherein the first reflective layer reflects the first light The light of the first wavelength of the valve and the light from the first wavelength Two infrared polarization converters of infrared light, the first reflective layer transmits the light of the second wavelength from the second light valve and the light of the third wavelength from the third light valve Light, the light of the first wavelength from the first light valve is emitted from the first reflective layer along the target direction, and the infrared light from the second infrared polarization converter is along the The direction opposite to the target direction is incident on the first reflective layer, the second reflective layer reflects the light of the second wavelength from the second light valve, and the second reflective layer transmits the light from the second light valve. The light of the first wavelength of the first light valve, the light of the third wavelength from the third light valve, and the infrared light from the second infrared polarization converter.
在本申请中，通过使用三个光阀分别接收3种颜色的光，可以增大单个光阀接收光的时间，从而增大射出投影设备的光的强度，因此第一光阀可以采集到质量较高的图像，图像处理器根据高质量的图像感知用户在投影图像内的操作，因此有利于提高图像处理器感知用户操作的精度。In this application, by using three light valves to receive light of 3 colors, the time for a single light valve to receive light can be increased, thereby increasing the intensity of light emitted from the projection device, so the first light valve can collect the quality With a higher image, the image processor perceives the user's operation in the projected image according to the high-quality image, which is beneficial to improve the accuracy of the image processor's perception of the user's operation.
结合第二方面，在第二方面的某些实现方式中，所述第一反射层包括用于反射红外光的红外反射层。With reference to the second aspect, in some implementations of the second aspect, the first reflective layer includes an infrared reflective layer for reflecting infrared light.
在本申请中，在第一反射层设置红外反射层，使得第一反射层可以具备反射红外光的能力。并且，可以不额外增加投影设备内的元器件数量，使得投影设备的结构更紧凑。In the present application, an infrared reflective layer is provided on the first reflective layer, so that the first reflective layer can have the ability to reflect infrared light. In addition, the number of components in the projection device may not be additionally increased, so that the structure of the projection device is more compact.
结合第二方面，在第二方面的某些实现方式中，所述第二红外偏振转换器包括：第一偏振转换器、第五偏振干涉滤光片；其中，所述第一偏振转换器用于将穿过所述第一偏振转换器的光转换为所述第一偏振光，来自所述成像透镜的红外光经所述第一偏振转换器转换为第一偏振红外光，经所述第一偏振转换器转换得到的第一偏振红外光属于所述第一偏振光；所述第五偏振干涉滤光片将来自所述第一偏振转换器的第一偏振红外光转换为第二偏振红外光。With reference to the second aspect, in some implementations of the second aspect, the second infrared polarization converter includes: a first polarization converter and a fifth polarization interference filter; wherein, the first polarization converter is used for The light passing through the first polarization converter is converted into the first polarized light, and the infrared light from the imaging lens is converted into the first polarization infrared light by the first polarization converter. The first polarized infrared light converted by the polarization converter belongs to the first polarized light; the fifth polarization interference filter converts the first polarized infrared light from the first polarization converter into the second polarized infrared light .
在本申请中，通过设置第五偏振干涉滤光片，可以改变红外光的偏振状态，而不改变第一波长的光的偏振状态，使得第一波长的光在穿过该第五偏振干涉滤光片时基本不受影响，因此可以保证投影图像的质量。In this application, by setting the fifth polarization interference filter, the polarization state of infrared light can be changed without changing the polarization state of the light of the first wavelength, so that the light of the first wavelength passes through the fifth polarization interference filter. The light sheet is basically unaffected, so the quality of the projected image can be guaranteed.
结合第二方面，在第二方面的某些实现方式中，所述第二光处理器射出包括所述图像信息的光，所述第二光处理器射出的光包括第一波长的第二偏振光、第二波长的第二偏振 光、第三波长的第二偏振光，所述第二偏振可见光为所述第一波长的第二偏振光；所述第一光阀射出的第一偏振可见光为所述第一波长的第一偏振光；所述投影设备还包括：第二偏振分光器、第三偏振分光器、第二光阀、第三光阀、合光器；其中，所述第二偏振分光器透射来自所述第二光处理器的所述第二波长的第二偏振光，透射所述第二偏振分光器的所述第二波长的第二偏振光垂直射入所述第二光阀；所述第二光阀采集透射所述第二偏振分光器的所述第二波长的第二偏振光，所述第二光阀将入射的所述第二波长的第二偏振光转换为所述第二波长的第一偏振光，所述第二光阀垂直射出经所述第二光阀转换得到的所述第二波长的第一偏振光，所述第二光阀射出的所述第二波长的第一偏振光经所述第二偏振分光器反射；所述第三偏振分光器透射来自所述第二光处理器的所述第三波长的第二偏振光，透射所述第三偏振分光器的所述第三波长的第二偏振光垂直射入所述第三光阀；所述第三光阀采集透射所述第三偏振分光器的所述第三波长的第二偏振光，所述第三光阀将入射的所述第三波长的第二偏振光转换为所述第三波长的第一偏振光，所述第三光阀垂直射出经所述第二光阀转换得到的所述第三波长的第一偏振光，所述第三光阀射出的所述第三波长的第一偏振光经所述第三偏振分光器反射；所述合光器汇合来自所述第一光阀的所述第一波长的光、来自所述第二光阀的所述第二波长的光、来自所述第三光阀的所述第三波长的光，经所述合光器汇合的光沿目标方向射出所述合光器，经所述合光器汇合的光穿过所述第二红外偏振转换器入射至所述成像透镜，所述来自所述第一光阀的所述第一波长的光沿所述目标方向入射至所述合光器，所述来自所述第二红外偏振转换器的红外光沿所述目标方向的相反方向入射至所述合光器，所述第一波长的光包括所述第一波长的第一偏振光和/或所述第一波长的第二偏振光，所述第二波长的光包括所述第二波长的第一偏振光和/或所述第二波长的第二偏振光，所述第三波长的光包括所述第三波长的第一偏振光和/所述或第三波长的第二偏振光；所述合光器包括：垂直且相交的第三反射层以及第四反射层，所述第四反射层将所述第三反射层划分为面积相同的两个部分，所述第三反射层将所述第四反射层划分为面积相同的两个部分，其中，所述第三反射层透射来自所述第一光阀的所述第一波长的光、来自所述第二光阀的所述第二波长的光以及来自所述第二红外偏振转换器的红外光，所述第三反射层反射来自所述第三光阀的所述第三波长的光，所述第四反射层透射来自所述第一光阀的所述第一波长的光、来自所述第三光阀的所述第三波长的光以及来自所述第二红外偏振转换器的红外光，所述第四反射层反射来自所述第二光阀的所述第二波长的光。With reference to the second aspect, in some implementations of the second aspect, the second optical processor emits light including the image information, and the light emitted by the second optical processor includes a second polarization of a first wavelength Light, second polarized light of the second wavelength, second polarized light of the third wavelength, the second polarized visible light is the second polarized light of the first wavelength; the first polarized visible light emitted by the first light valve Is the first polarized light of the first wavelength; the projection device further includes: a second polarization beam splitter, a third polarization beam splitter, a second light valve, a third light valve, and a light combiner; wherein, the first polarization beam splitter The two-polarization beam splitter transmits the second polarized light of the second wavelength from the second optical processor, and transmits the second polarized light of the second wavelength of the second polarization beam splitter to vertically enter the first Two light valves; the second light valve collects the second polarized light of the second wavelength transmitted through the second polarization beam splitter, and the second light valve will incident the second polarized light of the second wavelength Converted into the first polarized light of the second wavelength, the second light valve vertically emits the first polarized light of the second wavelength converted by the second light valve, and the second light valve emits The first polarized light of the second wavelength is reflected by the second polarization beam splitter; the third polarization beam splitter transmits the second polarized light of the third wavelength from the second optical processor, and transmits all The second polarized light of the third wavelength of the third polarization beam splitter vertically enters the third light valve; the third light valve collects the first light of the third wavelength that transmits the third polarization beam splitter Two-polarized light, the third light valve converts the incident second polarized light of the third wavelength into the first polarized light of the third wavelength, and the third light valve vertically emits the second light The first polarized light of the third wavelength obtained by the valve conversion, the first polarized light of the third wavelength emitted by the third light valve is reflected by the third polarization beam splitter; the light combiner converges from The light of the first wavelength of the first light valve, the light of the second wavelength from the second light valve, the light of the third wavelength from the third light valve, pass through the The light combined by the light combiner exits the light combiner along the target direction, the light combined by the light combiner enters the imaging lens through the second infrared polarization converter, and the light from the first light The light of the first wavelength of the valve is incident on the light combiner along the target direction, and the infrared light from the second infrared polarization converter is incident on the light combiner in a direction opposite to the target direction The light of the first wavelength includes the first polarized light of the first wavelength and/or the second polarized light of the first wavelength, and the light of the second wavelength includes the first polarized light of the second wavelength. Polarized light and/or the second polarized light of the second wavelength, the light of the third wavelength includes the first polarized light of the third wavelength and/or the second polarized light of the third wavelength; The light combiner includes a vertical and intersecting third reflective layer and a fourth reflective layer. The fourth reflective layer divides the third reflective layer into two parts with the same area. The third reflective layer divides the The fourth reflective layer is divided into two parts with the same area, wherein the The third reflective layer transmits light of the first wavelength from the first light valve, light of the second wavelength from the second light valve, and infrared light from the second infrared polarization converter, The third reflective layer reflects the light of the third wavelength from the third light valve, and the fourth reflective layer transmits the light of the first wavelength from the first light valve and the light from the first light valve. The light of the third wavelength of the three light valve and the infrared light from the second infrared polarization converter, and the fourth reflective layer reflects the light of the second wavelength from the second light valve.
在本申请中，通过使用三个光阀分别接收3种颜色的光，可以增大单个光阀接收光的时间，从而增大射出投影设备的光的强度，因此第一光阀可以采集到质量较高的图像，图像处理器根据高质量的图像感知用户在投影图像内的操作，因此有利于提高图像处理器感知用户操作的精度。In this application, by using three light valves to receive light of 3 colors, the time for a single light valve to receive light can be increased, thereby increasing the intensity of light emitted from the projection device, so the first light valve can collect the quality With a higher image, the image processor perceives the user's operations in the projected image according to the high-quality image, which is beneficial to improve the accuracy of the image processor's perception of user operations.
结合第二方面，在第二方面的某些实现方式中，所述第二光处理器射出包括所述图像信息的光，所述第二光处理器射出的光包括第一波长的第二偏振光、第二波长的第二偏振光以及第三波长的第二偏振光，所述第二偏振可见光为所述第一波长的第二偏振光；所述第一光阀射出的第一偏振可见光为所述第一波长的第一偏振光；所述投影设备还包括：第一偏振干涉滤光片、第二偏振分光器、第二偏振干涉滤光片、第三偏振分光器、第二光阀、第三光阀、第三偏振干涉滤光片、第一波片、第四偏振干涉滤光片、第四偏振分光器；其 中，所述第一光处理器射出的光穿过所述第一偏振干涉滤光片入射至所述第二偏振分光器，所述第一偏振干涉滤光片将入射的所述第一波长的第二偏振光转换为所述第一波长的第一偏振光；所述第二偏振分光器透射来自所述第一偏振干涉滤光片的所述第二波长的第二偏振光以及所述第三波长的第二偏振光，所述第二偏振分光器反射来自所述第一偏振干涉滤光片的所述第一波长的第一偏振光，透射所述第二偏振分光器的所述第二波长的第二偏振光、所述第三波长的第二偏振光入射至所述第二偏振干涉滤光片，经所述第二偏振分光器反射的所述第一波长的第一偏振光入射至所述第一波片；来自所述第二偏振分光器的所述第二波长的光、所述第三波长的光穿过所述第二偏振干涉滤光片入射至所述第三偏振分光器，所述第二偏振干涉滤光片将入射的所述第二波长的第二偏振光转换为所述第二波长的第一偏振光；所述第三偏振分光器反射来自所述第二偏振干涉滤光片的所述第二波长的第一偏振光，所述第三偏振分光器透射来自所述第二偏振干涉滤光片的所述第三波长的第二偏振光，经所述第三偏振分光器反射的所述第二波长的第一偏振光垂直射入所述第二光阀，透射所述第三偏振分光器的所述第三波长的第二偏振光垂直射入所述第三光阀；所述第二光阀采集经所述第三偏振分光器反射的所述第二波长的第一偏振光，所述第二光阀将入射的所述第二波长的第一偏振光转换为所述第二波长的第二偏振光，所述第二光阀垂直射出经所述第二光阀转换得到的所述第二波长的第二偏振光，所述第二光阀射出的所述第二波长的第二偏振光透射所述第三偏振分光器，透射所述第三偏振分光器的第二波长的第二偏振光入射至所述第三偏振干涉滤光片；所述第三光阀采集透射所述第三偏振分光器的所述第三波长的第二偏振光，所述第三光阀将入射的所述第三波长的第二偏振光转换为所述第三波长的第一偏振光，所述第三光阀垂直射出经所述第三光阀转换得到的所述第三波长的第一偏振光，所述第三光阀射出的所述第三波长的第一偏振光经所述第三偏振分光器反射至所述第三偏振干涉滤光片；来自所述第三偏振分光器的所述第二波长的光、所述第三波长的光穿过所述第三偏振干涉滤光片入射至所述第四偏振分光器，所述第三偏振干涉滤光片将来自所述第三偏振分光器的所述第二波长的第二偏振光转换为所述第二波长的第一偏振光；所述第一波片将来自所述第二偏振分光器的所述第一波长的第一偏振光转换为所述第一波长的第二偏振光，所述第一波片射出经所述第一波片转换得到的所述第一波长的第二偏振光，所述第一波片射出的所述第一波长的第二偏振光透射所述第一偏振分光器，透射所述第一偏振分光器的所述第一波长的第二偏振光入射至所述第一光阀；所述第四偏振干涉滤光片将来经所述第一偏振分光器反射的所述第一波长的第一偏振光转换为所述第一波长的第二偏振光，所述第四偏振干涉滤光片射出经所述第四偏振干涉滤光片转换得到的所述第一波长的第二偏振光，所述第四偏振干涉滤光片射出的所述第一波长的第二偏振光入射至所述第四偏振分光器；所述第四偏振分光器透射来自所述第四偏振干涉滤光片的所述第一波长的第二偏振光，所述第四偏振分光器反射来自所述第三偏振干涉滤光片的所述第二波长的第一偏振光、所述第三波长的第一偏振光，透射所述第四偏振分光器的所述第一波长的第二偏振光入射至所述第二红外偏振转换器，经所述第四偏振分光器反射的所述第二波长的第一偏振光、所述第三波长的第一偏振光入射至所述第二红外偏振转换器，来自所述第二红外偏振转换器的红外光透射所述第四偏振分光器，透射所述第四偏振分光器的红外光穿过所述第四偏振干涉滤光片入射至所述第一偏振分光器，所述第四偏振分光器射出的所述第一波长的第一偏振光、所述第二波长的第二偏振光、所述第三波 长的第二偏振光以及射入所述第四偏振分光器的红外光相互平行。With reference to the second aspect, in some implementations of the second aspect, the second optical processor emits light including the image information, and the light emitted by the second optical processor includes a second polarization of a first wavelength Light, a second polarized light of a second wavelength, and a second polarized light of a third wavelength, the second polarized visible light is the second polarized light of the first wavelength; the first polarized visible light emitted by the first light valve Is the first polarized light of the first wavelength; the projection device further includes: a first polarization interference filter, a second polarization beam splitter, a second polarization interference filter, a third polarization beam splitter, and a second light Valve, a third light valve, a third polarization interference filter, a first wave plate, a fourth polarization interference filter, and a fourth polarization beam splitter; wherein the light emitted by the first light processor passes through the The first polarization interference filter is incident on the second polarization beam splitter, and the first polarization interference filter converts the incident second polarization of the first wavelength into the first polarization of the first wavelength The second polarization beam splitter transmits the second polarization light of the second wavelength and the second polarization light of the third wavelength from the first polarization interference filter, the second polarization beam splitter Reflects the first polarized light of the first wavelength from the first polarization interference filter, and transmits the second polarized light of the second wavelength and the second polarized light of the third wavelength of the second polarization beam splitter. Two-polarized light is incident on the second polarization interference filter, and the first polarized light of the first wavelength reflected by the second polarization beam splitter is incident on the first wave plate; from the second polarization The light of the second wavelength and the light of the third wavelength of the beam splitter pass through the second polarization interference filter and enter the third polarization beam splitter, and the second polarization interference filter will enter the third polarization beam splitter. The second polarization of the second wavelength is converted into the first polarization of the second wavelength; the third polarization beam splitter reflects the first polarization of the second wavelength from the second polarization interference filter One polarized light, the third polarization beam splitter transmits the second polarized light of the third wavelength from the second polarization interference filter, and the second wavelength of the second wavelength reflected by the third polarization beam splitter The first polarized light vertically enters the second light valve, and the second polarized light of the third wavelength that transmits the third polarization beam splitter vertically enters the third light valve; the second light valve collects The first polarized light of the second wavelength reflected by the third polarization beam splitter, the second light valve converts the incident first polarized light of the second wavelength into the second polarized light of the second wavelength Polarized light, the second light valve vertically emits the second polarized light of the second wavelength converted by the second light valve, and the second polarized light of the second wavelength emitted by the second light valve The third polarization beam splitter is transmitted, and the second polarized light of the second wavelength that transmits the third polarization beam splitter is incident on the third polarization interference filter; the third light valve collects and transmits the third The second polarized light of the third wavelength of the polarization beam splitter, the third light valve converts the incident second polarized light of the third wavelength into the first polarized light of the third wavelength, and the Three light valves shoot vertically The first polarized light of the third wavelength converted by the third light valve, the first polarized light of the third wavelength emitted by the third light valve is reflected by the third polarization beam splitter to the third Polarization interference filter; the light of the second wavelength and the light of the third wavelength from the third polarization beam splitter pass through the third polarization interference filter and enter the fourth polarization beam splitter , The third polarization interference filter converts the second polarization of the second wavelength from the third polarization beam splitter into the first polarization of the second wavelength; the first wave plate will The first polarized light of the first wavelength from the second polarization beam splitter is converted into the second polarized light of the first wavelength, and the first wave plate emits all the light converted by the first wave plate. The second polarized light of the first wavelength, the second polarized light of the first wavelength emitted by the first wave plate transmits the first polarization beam splitter, and transmits the first polarization beam splitter of the first polarization beam splitter. The second polarized light of the wavelength is incident on the first light valve; the fourth polarization interference filter will convert the first polarized light of the first wavelength reflected by the first polarization beam splitter into the first polarized light One wavelength of the second polarized light, the fourth polarization interference filter emits the second polarized light of the first wavelength converted by the fourth polarization interference filter, and the fourth polarization interference filter The second polarized light of the first wavelength emitted by the film is incident on the fourth polarization beam splitter; the fourth polarization beam splitter transmits the second polarized light of the first wavelength from the fourth polarization interference filter Polarized light, the fourth polarization beam splitter reflects the first polarized light of the second wavelength and the first polarized light of the third wavelength from the third polarization interference filter, and transmits the fourth polarized light The second polarized light of the first wavelength of the beam splitter is incident on the second infrared polarization converter, and the first polarized light of the second wavelength and the third wavelength of the second wavelength reflected by the fourth polarized beam splitter The first polarized light is incident on the second infrared polarization converter, the infrared light from the second infrared polarization converter transmits through the fourth polarization beam splitter, and the infrared light that transmits the fourth polarization beam splitter passes through The fourth polarization interference filter is incident on the first polarization beam splitter, and the fourth polarization beam splitter emits the first polarized light of the first wavelength, the second polarized light of the second wavelength, The second polarized light of the third wavelength and the infrared light incident on the fourth polarizing beam splitter are parallel to each other.
在本申请中，通过使用三个光阀分别接收3种颜色的光，可以增大单个光阀接收光的时间，从而增大射出投影设备的光的强度，因此第一光阀可以采集到质量较高的图像，图像处理器根据高质量的图像感知用户在投影图像内的操作，因此有利于提高图像处理器感知用户操作的精度。第四偏振分光器汇合第一波长的光、第二波长的光以及第三波长的光，其中，第二波长的光以及第三波长的光可以沿同一方向射入第四偏振分光器，因此可以获得结构更加紧凑的投影设备，有利于投影设备的小型化。通过第二红外偏振转换器，可以改变红外光的偏振方向，使得第四偏振分光器、第一偏振分光器在均不具备反射红外光的能力的情况下，均可以实现反射红外光的功能。也就是说，在投影设备选择相对传统的偏振分光器的情况下，仍可以感知用户在投影区域内作用的红外线，进而获知用户在投影区域内指示的位置。In this application, by using three light valves to receive light of 3 colors, the time for a single light valve to receive light can be increased, thereby increasing the intensity of light emitted from the projection device, so the first light valve can collect the quality With a higher image, the image processor perceives the user's operation in the projected image according to the high-quality image, which is beneficial to improve the accuracy of the image processor's perception of the user's operation. The fourth polarization beam splitter combines the light of the first wavelength, the light of the second wavelength and the light of the third wavelength, wherein the light of the second wavelength and the light of the third wavelength can enter the fourth polarization beam splitter in the same direction, so A projection device with a more compact structure can be obtained, which is beneficial to the miniaturization of the projection device. Through the second infrared polarization converter, the polarization direction of the infrared light can be changed, so that the fourth polarization beam splitter and the first polarization beam splitter can realize the function of reflecting infrared light when neither has the ability to reflect infrared light. In other words, when the projection device selects a relatively traditional polarization beam splitter, it can still sense the infrared rays that the user acts in the projection area, and then know the position indicated by the user in the projection area.
结合第二方面，在第二方面的某些实现方式中，所述第一波长为625～740nm，所述第二波长为440～475nm，所述第三波长为492～577nm。With reference to the second aspect, in some implementations of the second aspect, the first wavelength is 625-740 nm, the second wavelength is 440-475 nm, and the third wavelength is 492-577 nm.
在本申请中，将第一波长设置为红光、第二波长设置为蓝光、第三波长设置为绿光，有利于匹配图像的标准格式(如红-绿-蓝(red-green-blue，RGB)格式等)。另外，第一波长设置为与红外光靠近的波长，且红外光沿与红光的部分光路相反的方向传播，有利于提高照射在图像传感器上的红外光的强度，因此有利于提高图像处理器感知用户操作的精度。In this application, the first wavelength is set to red light, the second wavelength is set to blue light, and the third wavelength is set to green light, which is beneficial to match the standard format of the image (such as red-green-blue (red-green-blue, RGB) format, etc.). In addition, the first wavelength is set to a wavelength close to the infrared light, and the infrared light propagates in the direction opposite to the part of the red light path, which is beneficial to increase the intensity of the infrared light irradiated on the image sensor, and therefore is beneficial to improve the image processor Perceive the accuracy of user operations.
结合第二方面，在第二方面的某些实现方式中，所述用户在所述投影区域内作用的红外光包括以下的任一种：由红外线遥控器发出的、经所述投影区域反射的红外光；手持杆件上的红外线光源发出的红外光；投影区域反射的红外光以及手指反射的红外光；投影区域反射的红外光以及杆件反射的红外光。With reference to the second aspect, in some implementations of the second aspect, the infrared light applied by the user in the projection area includes any one of the following: emitted by an infrared remote control and reflected by the projection area Infrared light; infrared light emitted by the infrared light source on the handheld rod; infrared light reflected by the projection area and infrared light reflected by the finger; infrared light reflected by the projection area and infrared light reflected by the rod.
在本申请中，对于多种形式的红外光，投影设备可以识别用户的指示位置，有利于实现投影交互的灵活性。In this application, for various forms of infrared light, the projection device can recognize the user's indicated position, which is beneficial to realize the flexibility of projection interaction.
第三方面，提供了一种投影交互的方法，所述方法由如第一方面至第二方面的任一种可能的实现方式所述的投影设备执行，所述方法包括：所述投影设备获取红外光的多个采集结果，所述红外光由手持红外线光源射出，所述投影设备包括如；所述投影设备根据所述多个所述采集结果以及所述投影设备的投影图像，确定用户手势以及所述用户手势在所述投影图像上的相对位置；所述投影设备根据所述用户手势以及所述相对位置，执行目标操作。In a third aspect, a projection interaction method is provided, the method is executed by the projection device according to any one of the possible implementation manners of the first aspect to the second aspect, and the method includes: the projection device obtains Multiple collection results of infrared light, the infrared light is emitted by a handheld infrared light source, the projection device includes such as; the projection device determines the user gesture according to the multiple collection results and the projection image of the projection device And the relative position of the user gesture on the projected image; the projection device executes the target operation according to the user gesture and the relative position.
采集红外光的装置例如可以是投影设备中的图像传感器。获取该采集结果可以是获取由图像传感器采集的数据。The device for collecting infrared light may be, for example, an image sensor in a projection device. Obtaining the collection result may be obtaining data collected by the image sensor.
在本申请中，用户手持红外线发射装置，在投影图像上做出手势。投影设备可以感知用户在投影图像上指示的手势，从而可以响应用户在投影图像上的操作。手势是一种常见、灵活的人机交互方式。本申请提供的投影交互的方法，使得用户可以通过手势实现用户与投影设备之间的交互。In this application, the user holds the infrared emitting device and makes gestures on the projected image. The projection device can perceive the gesture indicated by the user on the projected image, so that it can respond to the user's operation on the projected image. Gesture is a common and flexible way of human-computer interaction. The projection interaction method provided in the present application enables the user to realize the interaction between the user and the projection device through gestures.
结合第三方面，在第三方面的某些实现方式中，所述用户手势包括移动手势、点击手势、放大手势、缩小手势中的任一个。With reference to the third aspect, in some implementations of the third aspect, the user gesture includes any one of a move gesture, a tap gesture, a zoom-in gesture, and a zoom-out gesture.
放大手势例如可以是顺时针移动用户在投影图像上的指示位置。The zoom-in gesture may be, for example, moving the user's indicated position on the projected image clockwise.
缩小手势例如可以是逆时针移动用户在投影图像上的指示位置。The zooming out gesture may be, for example, moving the user's indicated position on the projected image counterclockwise.
在本申请中，移动手势、点击手势、放大手势、缩小手势均属于常见的人机交互手势。本申请提供的投影交互的方法可以适用于常见的人机交互手势，具有较强的灵活性。In this application, movement gestures, click gestures, zoom-in gestures, and zoom-out gestures all belong to common human-computer interaction gestures. The projection interaction method provided in this application can be applied to common human-computer interaction gestures and has strong flexibility.
结合第三方面，在第三方面的某些实现方式中，所述手持红外线光源包括红外线遥控器，或者，设置在手持杆件远离手的一端的红外线光源。With reference to the third aspect, in some implementation manners of the third aspect, the handheld infrared light source includes an infrared remote control, or an infrared light source disposed at an end of the handheld rod away from the hand.
在本申请中，红外光遥控器、手持杆件均属于常见的演示工具。本申请提供的投影交互的方法可以适用于常见的演示工具，具有较强的灵活性。In this application, infrared remote controllers and hand-held rods are common presentation tools. The projection interaction method provided in this application can be applied to common presentation tools and has strong flexibility.
附图说明Description of the drawings
图1是一种投影设备的应用场景的示意图。Fig. 1 is a schematic diagram of an application scenario of a projection device.
图2是另一种投影设备的应用场景的示意图。Fig. 2 is a schematic diagram of an application scenario of another projection device.
图3是又一种投影设备的应用场景的示意图。Fig. 3 is a schematic diagram of another application scenario of a projection device.
图4是本申请实施例提供的第一种投影设备在一种场景下的示意性结构图。FIG. 4 is a schematic structural diagram of the first projection device in a scenario according to an embodiment of the present application.
图5是本申请实施例提供的第一种投影设备在另一种场景下的示意性结构图。FIG. 5 is a schematic structural diagram of the first projection device in another scenario according to an embodiment of the present application.
图6是本申请实施例提供的第一种投影设备在又一种场景下的示意性结构图。FIG. 6 is a schematic structural diagram of the first projection device in another scenario according to an embodiment of the present application.
图7是本申请实施例提供的一种第一偏振分光器的示意性结构图。FIG. 7 is a schematic structural diagram of a first polarization beam splitter provided by an embodiment of the present application.
图8是本申请实施例提供的一种投影交互的方法的第一部分的原理图。FIG. 8 is a schematic diagram of the first part of a projection interaction method provided by an embodiment of the present application.
图9是本申请实施例提供的一种投影交互的方法的第二部分的原理图。FIG. 9 is a schematic diagram of the second part of a projection interaction method provided by an embodiment of the present application.
图10是本申请实施例提供的一种执行移动手势的投影区域的示意图。FIG. 10 is a schematic diagram of a projection area for performing a movement gesture according to an embodiment of the present application.
图11是本申请实施例提供的一种执行点击手势的投影区域的示意图。FIG. 11 is a schematic diagram of a projection area for performing a click gesture according to an embodiment of the present application.
图12是本申请实施例提供的一种执行放大手势的投影区域的示意图。FIG. 12 is a schematic diagram of a projection area for performing a zoom-in gesture according to an embodiment of the present application.
图13是本申请实施例提供的一种执行缩小手势的投影区域的示意图。FIG. 13 is a schematic diagram of a projection area for performing a zooming out gesture provided by an embodiment of the present application.
图14是本申请实施例提供的第二种投影设备的示意性结构图。FIG. 14 is a schematic structural diagram of a second projection device provided by an embodiment of the present application.
图15是本申请实施例提供的第三种投影设备的示意性结构图。FIG. 15 is a schematic structural diagram of a third projection device provided by an embodiment of the present application.
图16是本申请实施例提供的第四种投影设备的示意性结构图。FIG. 16 is a schematic structural diagram of a fourth projection device provided by an embodiment of the present application.
图17是本申请实施例提供的第五种投影设备的示意性结构图。FIG. 17 is a schematic structural diagram of a fifth projection device provided by an embodiment of the present application.
图18是本申请实施例提供的第六种投影设备的示意性结构图。FIG. 18 is a schematic structural diagram of a sixth projection device provided by an embodiment of the present application.
图19是本申请实施例提供的第七种投影设备的示意性结构图。FIG. 19 is a schematic structural diagram of a seventh projection device provided by an embodiment of the present application.
图20是本申请实施例提供的第八种投影设备的示意性结构图。FIG. 20 is a schematic structural diagram of an eighth projection device provided by an embodiment of the present application.
图21是本申请实施例提供的第九种投影设备的示意性结构图。FIG. 21 is a schematic structural diagram of a ninth projection device provided by an embodiment of the present application.
图22是本申请实施例提供的第十种投影设备的示意性结构图。FIG. 22 is a schematic structural diagram of a tenth projection device provided by an embodiment of the present application.
图23是本申请实施例提供的第十一种投影设备的示意性结构图。FIG. 23 is a schematic structural diagram of an eleventh projection device provided by an embodiment of the present application.
图24是本申请实施例提供的第十二种投影设备的示意性结构图。FIG. 24 is a schematic structural diagram of a twelfth type of projection device provided by an embodiment of the present application.
图25是本申请实施例提供的第十三种投影设备的示意性结构图。FIG. 25 is a schematic structural diagram of a thirteenth projection device provided by an embodiment of the present application.
具体实施方式Detailed ways
下面将结合附图，对本申请中的技术方案进行描述。The technical solution in this application will be described below in conjunction with the accompanying drawings.
以下实施例中所使用的术语只是为了描述特定实施例的目的，而并非旨在作为对本申请的限制。如在本申请的说明书和所附权利要求书中所使用的那样，单数表达形式“一个”、 “一种”、“所述”、“上述”、“该”和“这一”旨在也包括例如“一个或多个”这种表达形式，除非其上下文中明确地有相反指示。还应当理解，在本申请以下各实施例中，“至少一个”、“一个或多个”是指一个、两个或两个以上。术语“和/或”，用于描述关联对象的关联关系，表示可以存在三种关系；例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A、B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。另外，为了描述清晰，本申请采用“第一”、“第二”、数字、字母等形式阐述示例，但仅限于对实施例、部件、步骤等进行区分，并不属于对本申请实施例的限定性描述。The terms used in the following embodiments are only for the purpose of describing specific embodiments, and are not intended to limit the application. As used in the specification and appended claims of this application, the singular expressions "a", "an", "said", "above", "the" and "this" are intended to also This includes expressions such as "one or more" unless the context clearly indicates to the contrary. It should also be understood that in the following embodiments of the present application, "at least one" and "one or more" refer to one, two, or more than two. The term "and/or" is used to describe the association relationship of associated objects, indicating that there can be three types of relationships; for example, A and/or B can mean that: A alone exists, A and B exist at the same time, and B exists alone. Among them, A and B can be singular or plural. The character "/" generally indicates that the associated objects before and after are in an "or" relationship. In addition, for clarity of description, this application uses "first", "second", numbers, letters and other forms to illustrate examples, but it is limited to distinguishing embodiments, components, steps, etc., and does not limit the embodiments of this application. Sexual description.
在本说明书中描述的参考“一个实施例”或“一些实施例”等意味着在本申请的一个或多个实施例中包括结合该实施例描述的特定特征、结构或特点。由此，在本说明书中的不同之处出现的语句“在一个实施例中”、“在一些实施例中”、“在其他一些实施例中”、“在另外一些实施例中”等不是必然都参考相同的实施例，而是意味着“一个或多个但不是所有的实施例”，除非是以其他方式另外特别强调。术语“包括”、“包含”、“具有”及它们的变形都意味着“包括但不限于”，除非是以其他方式另外特别强调。References described in this specification to "one embodiment" or "some embodiments", etc. mean that one or more embodiments of the present application include a specific feature, structure, or characteristic described in combination with the embodiment. Therefore, the sentences "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. appearing in different places in this specification are not necessarily All refer to the same embodiment, but mean "one or more but not all embodiments" unless it is specifically emphasized otherwise. The terms "including", "including", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.
图1至图3示出了投影设备的3种应用场景。投影设备110可以包括出光口111，带有图像信息的光可以从该出光口111射出。该出光口111的形状可以是圆形。射出投影设备110的光可以照射在投影区域120，从而该光所包含的图像信息可以在该投影区域120上显示。投影区域120可以是竖直墙壁、水平房顶、桌面、地面、幕布等物体的一部分。出光口111与投影区域120之间存在一定的间距。从出光口111射出的光可以穿过出光口111与投影区域120之间的间距，并且可以向四周发散，使得出光口111的尺寸可以远小于投影区域120的尺寸。Figures 1 to 3 show three application scenarios of the projection device. The projection device 110 may include a light outlet 111 from which light with image information may be emitted. The shape of the light outlet 111 may be circular. The light emitted from the projection device 110 can be irradiated on the projection area 120 so that the image information contained in the light can be displayed on the projection area 120. The projection area 120 may be a part of objects such as a vertical wall, a horizontal roof, a table top, the ground, and a curtain. There is a certain distance between the light exit 111 and the projection area 120. The light emitted from the light exit 111 can pass through the distance between the light exit 111 and the projection area 120 and can diverge to the surroundings, so that the size of the light exit 111 can be much smaller than the size of the projection area 120.
出光口111与投影区域120之间的间距越大，出光口111射出的光与垂直于出光口111的轴线之间的夹角的最大值越小。下面以图1、图2为例进行说明。图1所示为出光口111与投影区域120之间的间距相对较大的情况。图2所示为出光口111与投影区域120之间的间距相对较小的情况。在图1所示的示例中，出光口111射出的光与垂直于出光口111的轴线的夹角最大值为A。在图2所示的示例中，出光口111射出的光与垂直于出光口111的轴线的夹角最大值为B。很明显，B可以大于A。The larger the distance between the light outlet 111 and the projection area 120, the smaller the maximum value of the angle between the light emitted from the light outlet 111 and the axis perpendicular to the light outlet 111. The following description takes Figure 1 and Figure 2 as examples. FIG. 1 shows a situation where the distance between the light outlet 111 and the projection area 120 is relatively large. FIG. 2 shows a situation where the distance between the light exit 111 and the projection area 120 is relatively small. In the example shown in FIG. 1, the maximum value of the angle between the light emitted by the light outlet 111 and the axis perpendicular to the light outlet 111 is A. In the example shown in FIG. 2, the maximum value of the angle between the light emitted from the light outlet 111 and the axis perpendicular to the light outlet 111 is B. Obviously, B can be greater than A.
如图1、图2所示，出光口111与投影区域120可以平行或近似平行设置。图1、图2所示的投影设备110可以被放置在地面、桌面上，或者被固定在水平房顶、竖直墙面上，并且出光口111与地面(近似)垂直；那么，投影区域120可以位于与地面(近似)垂直的墙壁、垂挂的幕布上。图1、图2所示的投影设备110还可以被放置在地面、桌面上，或者被固定在水平房顶、竖直墙壁上，并且出光口111与地面(近似)平行；那么，投影区域120可以位于水平房顶、地面、桌面上。As shown in FIG. 1 and FIG. 2, the light exit 111 and the projection area 120 may be arranged in parallel or approximately in parallel. The projection device 110 shown in FIG. 1 and FIG. 2 can be placed on the ground, a desktop, or fixed on a horizontal roof or a vertical wall, and the light outlet 111 is (approximately) perpendicular to the ground; then, the projection area 120 It can be located on a wall (approximately) perpendicular to the ground or a hanging curtain. The projection device 110 shown in FIG. 1 and FIG. 2 can also be placed on the ground, a desktop, or fixed on a horizontal roof or a vertical wall, and the light outlet 111 is (approximately) parallel to the ground; then, the projection area 120 It can be located on the horizontal roof, the ground, or on the desktop.
如图3所示，出光口111与投影区域120可以垂直或近似垂直。投影设备110可以被放置在地面、桌面上，或者被固定在水平房顶、竖直墙壁上，且出光口111与地面(近似)垂直；那么，投影区域120可以位于地面、桌面、水平房顶上。投影设备110还可以被放置在地面、桌面上，或者被固定在水平房顶、竖直墙壁上，且出光口111与墙壁(近似)垂直；那么，投影区域120可以位于与地面(近似)垂直的墙壁、垂挂的幕布上。As shown in FIG. 3, the light exit 111 and the projection area 120 may be perpendicular or approximately perpendicular. The projection device 110 can be placed on the ground, a desktop, or fixed on a horizontal roof or a vertical wall, and the light outlet 111 is (approximately) perpendicular to the ground; then, the projection area 120 can be located on the ground, a desktop, or a horizontal roof. on. The projection device 110 can also be placed on the ground, a desktop, or fixed on a horizontal roof or a vertical wall, and the light outlet 111 is (approximately) perpendicular to the wall; then, the projection area 120 can be located (approximately) perpendicular to the ground On the walls, hanging curtains.
投影设备110在发出包含图像信息的光之前，投影设备110可以获取该图像信息。在 一个示例中，该投影设备110可以存储一张或多张图像，投影设备110获取该图像信息的方式可以是该投影设备110从存储介质中读取该图像信息。在一个示例中，投影设备110可以接收电子设备发送的该图像信息，电子设备例如可以是手机、服务器、手表、路由器、平板电脑、电子阅读器、笔记本电脑、数码相机、或可穿戴设备等。例如，该投影设备110可以通过路由器130接入无线局域网(wireless local area network，WLAN)，并从云端服务器接收该图像信息。又如，该投影设备110可以通过蓝牙通信协议接收电子设备140发送的该图像信息。又如，投影设备110可以通过硬件接口(例如高清多媒体接口(high definition multimedia interface，HDMI)、通用串行总线(USB)接口等)，接收电子设备150发送的该图像信息。Before the projection device 110 emits light containing image information, the projection device 110 may obtain the image information. In an example, the projection device 110 may store one or more images, and the manner in which the projection device 110 obtains the image information may be that the projection device 110 reads the image information from a storage medium. In an example, the projection device 110 can receive the image information sent by an electronic device, such as a mobile phone, a server, a watch, a router, a tablet computer, an e-reader, a notebook computer, a digital camera, or a wearable device. For example, the projection device 110 may access a wireless local area network (WLAN) through a router 130, and receive the image information from a cloud server. For another example, the projection device 110 may receive the image information sent by the electronic device 140 through a Bluetooth communication protocol. For another example, the projection device 110 may receive the image information sent by the electronic device 150 through a hardware interface (for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, etc.).
图4至图6示出了本申请提供的一种投影设备的结构性示意图。图4至图6所示的投影设备401可以是如图1至图3中的投影设备110。投影设备401发出的光可以投影在投影区域402，从而在该投影区域402上可以显示有图像。投影区域402可以是如图1至图3中的投影区域120。Figures 4 to 6 show schematic structural diagrams of a projection device provided by the present application. The projection device 401 shown in FIGS. 4 to 6 may be the projection device 110 shown in FIGS. 1 to 3. The light emitted by the projection device 401 can be projected on the projection area 402, so that an image can be displayed on the projection area 402. The projection area 402 may be the projection area 120 as shown in FIGS. 1 to 3.
投影设备401可以包括第一光处理器410、第一偏振分光器420、第一光阀430、图像传感器440、成像透镜450。The projection device 401 may include a first light processor 410, a first polarization beam splitter 420, a first light valve 430, an image sensor 440, and an imaging lens 450.
第一光处理器410可以射出第一偏振可见光。该第一偏振可见光的波长例如可以是380nm～780nm。该第一偏振可见光属于第一偏振光。第一偏振光例如可以是S偏振光或P偏振光。S偏振光可以指光的偏振方向与入射面垂直。P偏振光可以指光的偏振方向平行于入射面。第一光处理器410发出的光包含投影图像的图像信息。一种可能的情况，如图4所示，第一光处理器410例如可以包括光源411、偏振转换器412。The first light processor 410 can emit the first polarized visible light. The wavelength of the first polarized visible light may be, for example, 380 nm to 780 nm. The first polarized visible light belongs to the first polarized light. The first polarized light may be, for example, S-polarized light or P-polarized light. S-polarized light can mean that the polarization direction of the light is perpendicular to the incident surface. P-polarized light can mean that the polarization direction of light is parallel to the incident surface. The light emitted by the first light processor 410 contains image information of the projected image. In a possible situation, as shown in FIG. 4, the first optical processor 410 may include, for example, a light source 411 and a polarization converter 412.
光源411可以为投影设备401供光。光源411发出的光包含投影图像的图像信息。光源411发出的光可以是自然光。自然光通常包括第一偏振光以及第二偏振光，第一偏振光的偏振方向垂直于第二偏振光的偏振方向。第一偏振光例如可以是S偏振光，第二偏振光例如可以是P偏振光。或者，第一偏振光例如可以是P偏振光，第二偏振光例如可以是S偏振光。The light source 411 can provide light for the projection device 401. The light emitted by the light source 411 contains image information of the projected image. The light emitted by the light source 411 may be natural light. Natural light usually includes first polarized light and second polarized light, and the polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light. The first polarized light may be, for example, S polarized light, and the second polarized light may be, for example, P polarized light. Alternatively, the first polarized light may be, for example, P polarized light, and the second polarized light may be, for example, S polarized light.
例如，光源411可以包括一个或多个发光二极管(light-emitting diode，LED)。For example, the light source 411 may include one or more light-emitting diodes (LEDs).
又如，光源411可以包括发光单元阵列。发光单元阵列包括多个发光单元组；每个发光单元组由红光发光单元、绿光发光单元以及蓝光发光单元组成；任一发光单元组中的目标发光单元与该任一发光单元组中除该目标发光单元以外的其他发光单元均相邻；目标发光单元可以是红光发光单元、绿光发光单元、蓝光发光单元中的任一个。投影设备401可以根据待投影的图像信息，选择性地驱动发光单元阵列发光。For another example, the light source 411 may include an array of light emitting units. The light-emitting unit array includes a plurality of light-emitting unit groups; each light-emitting unit group is composed of a red light-emitting unit, a green light-emitting unit, and a blue light-emitting unit; the target light-emitting unit in any light-emitting unit group is divided from any light-emitting unit group. Other light-emitting units except the target light-emitting unit are all adjacent; the target light-emitting unit may be any one of a red light-emitting unit, a green light-emitting unit, and a blue light-emitting unit. The projection device 401 can selectively drive the light-emitting unit array to emit light according to the image information to be projected.
又如，光源411可以包括发光单元阵列、液晶层、滤光层。发光单元阵列包括多个发光单元。滤光层包括多个滤光单元组；每个滤光单元组由红光滤光片、绿光滤光片以及蓝光滤光片组成；任一滤光单元组中的目标滤光片与该任一滤光单元组中除该目标滤光片以外的其他滤光片均相邻；目标滤光片可以是红光滤光片、绿光滤光片、蓝光滤光片中的任一个。液晶层选择性地透过来自发光单元阵列的光。投影设备401可以根据待投影的图像信息，驱动液晶层选择性地透过来自发光单元阵列的光。For another example, the light source 411 may include a light-emitting unit array, a liquid crystal layer, and a filter layer. The light emitting unit array includes a plurality of light emitting units. The filter layer includes a plurality of filter unit groups; each filter unit group is composed of a red light filter, a green light filter and a blue light filter; the target filter in any filter unit group and the Other filters in any filter unit group except the target filter are adjacent; the target filter can be any one of a red filter, a green filter, and a blue filter. The liquid crystal layer selectively transmits light from the light emitting unit array. The projection device 401 can drive the liquid crystal layer to selectively transmit light from the light emitting unit array according to the image information to be projected.
偏振转换器412可以将来自光源411的光转换为该第一偏振光。The polarization converter 412 can convert the light from the light source 411 into the first polarized light.
例如，假设光源411发出的光包括第一偏振光以及第二偏振光，偏振转换器412可以 将光源411发出的第二偏振光转换为第一偏振光，并透过光源411发出的第一偏振光。For example, assuming that the light emitted by the light source 411 includes the first polarized light and the second polarized light, the polarization converter 412 can convert the second polarized light emitted by the light source 411 into the first polarized light, and transmit the first polarized light emitted by the light source 411. Light.
又如，假设光源411发出的光包括第一偏振光以及第二偏振光，偏振转换器412可以过滤光源411发出的第二偏振光，并透过光源411发出的第一偏振光。For another example, assuming that the light emitted by the light source 411 includes the first polarized light and the second polarized light, the polarization converter 412 can filter the second polarized light emitted by the light source 411 and transmit the first polarized light emitted by the light source 411.
应理解，第一光处理器可以不包括光源。设置在投影设备内的光源发出的光可以经第一光处理器转换，使得第一光处理器可以射出第一偏振光。It should be understood that the first light processor may not include a light source. The light emitted by the light source arranged in the projection device can be converted by the first light processor, so that the first light processor can emit the first polarized light.
第一偏振分光器420可以反射第一偏振光，并透射第二偏振光。来自第一光处理器410的第一偏振可见光可以入射至第一偏振分光器420的第一侧A。经第一偏振分光器420第一侧A反射的第一偏振可见光可以垂直射入第一光阀430。例如，如图4至图6所示，射入第一偏振分光器420的第一偏振可见光可以与第一光阀430平行。来自第一光处理器410的第一偏振可见光可以以45°入射角射入第一偏振分光器420，以45°出射角射出第一偏振分光器420。从而，射出第一偏振分光器420的第一偏振可见光可以垂直射入第一光阀430。第一光阀430可以采集来自第一偏振分光器420的第一偏振可见光。The first polarization beam splitter 420 may reflect the first polarized light and transmit the second polarized light. The first polarized visible light from the first light processor 410 may be incident on the first side A of the first polarization beam splitter 420. The first polarized visible light reflected by the first side A of the first polarization beam splitter 420 may be vertically incident on the first light valve 430. For example, as shown in FIGS. 4 to 6, the first polarized visible light incident on the first polarization beam splitter 420 may be parallel to the first light valve 430. The first polarized visible light from the first light processor 410 may enter the first polarization beam splitter 420 at an incident angle of 45°, and exit the first polarization beam splitter 420 at an exit angle of 45°. Therefore, the first polarized visible light emitted from the first polarization beam splitter 420 can be perpendicularly injected into the first light valve 430. The first light valve 430 may collect the first polarized visible light from the first polarization beam splitter 420.
第一光阀430可以将垂直入射的第一偏振可见光转变为第二偏振可见光，并垂直射出该第二偏振可见光。该第二偏振可见光属于第二偏振光。例如，第一光阀430可以将入射的S偏振光转变为P偏振光。或者，第一光阀430可以将入射的P偏振光转变为S偏振光。第一光阀430例如可以是硅基液晶(liquid crystal on silicon，LCoS)芯片、数字微镜器件(digital micromirror device，DMD)等。The first light valve 430 can convert the vertically incident first-polarized visible light into a second-polarized visible light, and emit the second-polarized visible light vertically. The second polarized visible light belongs to the second polarized light. For example, the first light valve 430 may convert incident S-polarized light into P-polarized light. Alternatively, the first light valve 430 may convert incident P-polarized light into S-polarized light. The first light valve 430 may be, for example, a liquid crystal on silicon (LCoS) chip, a digital micromirror device (DMD), or the like.
根据光的可逆性可知，第一光阀430射出的第二偏振可见光可以入射至第一偏振分光器420的第一侧A。由于第一偏振分光器420可以透射第二偏振光，因此来自第一光阀430的第二偏振可见光可以从第一偏振分光器420的第一侧A射入，从第一偏振分光器420的第二侧B射出，并到达成像透镜450。从而，包含投影图像的图像信息的光可以入射至成像透镜450。According to the reversibility of light, the second polarized visible light emitted by the first light valve 430 can be incident on the first side A of the first polarization beam splitter 420. Since the first polarizing beam splitter 420 can transmit the second polarized light, the second polarized visible light from the first light valve 430 can enter from the first side A of the first polarizing beam splitter 420, and from the first polarizing beam splitter 420. The second side B exits and reaches the imaging lens 450. Thus, the light containing the image information of the projected image can be incident on the imaging lens 450.
成像透镜450可以将投影图像成像在投影区域402内。也就是说，第一光阀430射出的、包含有投影图像的图像信息的光可以穿过成像透镜450、射出投影设备401并投影在投影区域402内。因此，第一光阀430与投影区域402满足物像共轭关系。成像透镜450可以是凸透镜，还可以是包括多个透镜的透镜组。成像透镜450可以是具有变焦性能的透镜，也可以是具有固定焦距的透镜。The imaging lens 450 can image the projected image in the projection area 402. In other words, the light emitted by the first light valve 430 and containing the image information of the projected image can pass through the imaging lens 450, exit the projection device 401, and be projected in the projection area 402. Therefore, the first light valve 430 and the projection area 402 satisfy the object-image conjugate relationship. The imaging lens 450 may be a convex lens or a lens group including a plurality of lenses. The imaging lens 450 may be a lens with zoom performance or a lens with a fixed focal length.
用户可以在投影区域402观察由投影设备401投影的投影图像。并且，用户可以在投影区域402内通过作用红外光，从而在投影图像上指示。用户在投影区域402内作用红外光可以是，用户使用红外线遥控器向投影区域402发出红外光，该红外光可以经投影区域402反射；用户手持的杆件在投影区域402内指示，该杆件上的红外线光源可以发出红外光；红外线光源照射在投影区域402内，手指在投影区域402内可以反射红外光；红外线光源照射在投影区域402内，杆件在投影区域402内可以反射红外光。图4至图6中双点虚线表示红外光，带箭头的实线表示包含投影图像的图像信息的可见光。The user can observe the projection image projected by the projection device 401 in the projection area 402. In addition, the user can apply infrared light in the projection area 402 to indicate on the projected image. The user can apply infrared light to the projection area 402 by using an infrared remote control to emit infrared light to the projection area 402, and the infrared light can be reflected by the projection area 402; a rod held by the user indicates in the projection area 402, the rod The infrared light source can emit infrared light; the infrared light source illuminates the projection area 402, and the finger can reflect infrared light in the projection area 402; the infrared light source illuminates the projection area 402, and the rod can reflect infrared light in the projection area 402. In FIGS. 4 to 6, the double-dotted dotted line represents infrared light, and the solid line with arrows represents visible light including image information of the projected image.
在一个示例中，如图4所示，用户在使用投影设备401的过程中，可以借助红外线遥控器461朝投影区域402发射红外光，使得在投影区域402上可以出现红外光的投射位置403。红外线遥控器461发出的红外光可以经投影区域402反射至投影设备401，从而投影设备401可以确定红外光的投射位置403。红外光的投射位置403可以是用户在投影图像上所指示的位置。用户通过移动、停留红外光的投射位置403，可以实现在投影图像上 点击手势、移动手势等，进而实现与投影设备401的交互。In an example, as shown in FIG. 4, when the user uses the projection device 401, the user can use the infrared remote control 461 to emit infrared light toward the projection area 402, so that the projection position 403 of the infrared light can appear on the projection area 402. The infrared light emitted by the infrared remote controller 461 can be reflected to the projection device 401 through the projection area 402, so that the projection device 401 can determine the projection position 403 of the infrared light. The projection position 403 of the infrared light may be the position indicated by the user on the projection image. By moving and staying at the projection position 403 of the infrared light, the user can implement a click gesture, a movement gesture, etc. on the projected image, thereby realizing interaction with the projection device 401.
在一个示例中，如图5所示，投影设备401还包括红外线光源561，该红外线光源561可以向投影区域402发射红外光。因此，投影区域402上呈现的内容可以包括投影图像，以及照射在该投影图像上的红外光。照射在投影区域402的红外光可以反射至投影设备401。用户在使用投影设备401的过程中，可以使用手(或手持杆件)562等指示投影图像的一部分。手指(或手持杆件远离手的一端)在投影区域402上指示的位置503可以是用户在投影图像上所指示的位置。由于手(或手持杆件)562也可以反射红外光至投影设备401，因此投影设备401可以根据投影区域402反射的红外光，以及手(或手持杆件)562反射的红外光，判断手指在投影图像上的位置(或手持杆件远离手的一端在投影图像上的位置)，进而确定用户在投影图像上所指示的位置。从而，用户可以使用手(或手持杆件)562在投影图像上停留、滑动等，以实现相应手势。In an example, as shown in FIG. 5, the projection device 401 further includes an infrared light source 561, and the infrared light source 561 can emit infrared light to the projection area 402. Therefore, the content presented on the projection area 402 may include a projected image and infrared light irradiated on the projected image. The infrared light irradiated on the projection area 402 can be reflected to the projection device 401. In the process of using the projection device 401, the user can use a hand (or a hand-held rod) 562 or the like to indicate a part of the projected image. The position 503 indicated by the finger (or the end of the holding rod away from the hand) on the projection area 402 may be the position indicated by the user on the projected image. Since the hand (or hand-held rod) 562 can also reflect infrared light to the projection device 401, the projection device 401 can determine whether the finger is in position based on the infrared light reflected by the projection area 402 and the infrared light reflected by the hand (or hand-held rod) 562 The position on the projected image (or the position of the end of the hand-held rod away from the hand on the projected image) is used to determine the position indicated by the user on the projected image. Thus, the user can use the hand (or the hand-held rod) 562 to stay, slide, etc. on the projected image to implement corresponding gestures.
在一个示例中，如图6所示，用户在使用投影设备401的过程中，可以借助包括红外线光源661的手持杆件662，以指示投影图像的一部分。该红外线光源661可以位于该手持杆件662远离手的一端，该红外线光源661在投影区域402上指示的位置603可以是用户在投影图像上所指示的位置。手持杆件662上的红外线光源661发出的红外光可以反射至投影设备401，从而投影设备401可以确定用户在投影图像上所指示的位置。因此，用户在使用投影设备401的过程中，可以借助包括红外线光源661的手持杆件662，通过停留、滑动红外线光源661，以实现相应手势。In an example, as shown in FIG. 6, when using the projection device 401, the user can use a hand-held rod 662 including an infrared light source 661 to indicate a part of the projected image. The infrared light source 661 may be located at an end of the hand-held rod 662 away from the hand, and the position 603 indicated by the infrared light source 661 on the projection area 402 may be the position indicated by the user on the projected image. The infrared light emitted by the infrared light source 661 on the handheld rod 662 can be reflected to the projection device 401, so that the projection device 401 can determine the position indicated by the user on the projected image. Therefore, in the process of using the projection device 401, the user can use the hand-held rod 662 including the infrared light source 661 to stop and slide the infrared light source 661 to implement corresponding gestures.
下面先通过图4至图6的示例阐述投影设备401如何确定用户在投影图像上所指示的位置。用户在投影图像上所指示的位置可以是红外线遥控器461发出的红外光在投影区域402上的投射位置403。在投影设备401包括向投影区域402发射红外光的红外线光源561的情况下，用户在投影图像上所指示的位置还可以是手指(或手持杆件远离手的一端)在投影区域402上指示的位置503。用户在投影图像上所指示的位置还可以是手持杆件662上的红外线光源661在投影区域402上所指示的位置603。The following first illustrates how the projection device 401 determines the position indicated by the user on the projected image through the examples in FIGS. 4 to 6. The position indicated by the user on the projection image may be the projection position 403 of the infrared light emitted by the infrared remote control 461 on the projection area 402. In the case where the projection device 401 includes an infrared light source 561 that emits infrared light to the projection area 402, the position indicated by the user on the projected image may also be indicated by the finger (or the end of the holding rod away from the hand) on the projection area 402 Location 503. The position indicated by the user on the projection image may also be the position 603 indicated on the projection area 402 by the infrared light source 661 on the handheld rod 662.
如图4至图6所示，用户在投影图像上所指示的位置可以通过反射至成像透镜450的红外光确定。用户在投影图像上所指示的位置可以在成像透镜450远离投影区域402的一侧形成实像。由于投影设备401发出的光的强度相对较弱，因此，投影图像在成像透镜450远离投影区域402的一侧所形成实像可以忽略不计。根据光的可逆性，射入投影设备401的红外光可以穿过成像透镜450到达第一偏振分光器420的第二侧B。As shown in FIGS. 4 to 6, the position indicated by the user on the projected image can be determined by the infrared light reflected to the imaging lens 450. The position indicated by the user on the projection image may form a real image on the side of the imaging lens 450 away from the projection area 402. Since the intensity of the light emitted by the projection device 401 is relatively weak, the real image formed by the projected image on the side of the imaging lens 450 away from the projection area 402 can be ignored. According to the reversibility of light, the infrared light incident on the projection device 401 may pass through the imaging lens 450 to the second side B of the first polarization beam splitter 420.
第一偏振分光器420还可以反射红外光。例如，如图4至图6所示，来自成像透镜450的红外光可以以45°入射角射入第一偏振分光器420，以45°出射角射出第一偏振分光器420。The first polarization beam splitter 420 may also reflect infrared light. For example, as shown in FIGS. 4 to 6, the infrared light from the imaging lens 450 may enter the first polarizing beam splitter 420 at an incident angle of 45°, and exit the first polarizing beam splitter 420 at an exit angle of 45°.
结合第一偏振分光器420可以反射第一偏振光并透射第二偏振光，可以得出，第一偏振分光器420可以反射第一偏振光、红外光，透射除第一偏振光、红外光以外的其他光。也就是说，第一偏振分光器420可以透射波长与红外光的波长不同的第二偏振光。Combining with the first polarization beam splitter 420 can reflect the first polarized light and transmit the second polarized light, it can be concluded that the first polarization beam splitter 420 can reflect the first polarized light and infrared light, and transmit other than the first polarized light and infrared light. Other light. That is, the first polarization beam splitter 420 may transmit the second polarized light having a wavelength different from that of infrared light.
如图7所示，第一偏振分光器420可以包括红外反射层以及偏振分光层。偏振分光层可以反射第一偏振光，并透射第二偏振光。红外反射层可以反射红外光，并透射波长与红外光的波长不同的光，例如可见光。按照波长划分，第一偏振光可以包括第一偏振红外光以及第一偏振可见光，第二偏振光可以包括第二偏振红外光以及第二偏振可见光，第一偏 振红外光、第二偏振红外光属于红外光，第一偏振可见光、第二偏振可见光属于可见光。应理解，图7示出的红外反射层以及偏振分光层仅是一种结构性的示意图。由于红外反射层、偏振分光层的厚度较薄，因此光在红外反射层、偏振分光层内所发生的折射可以忽略不计。As shown in FIG. 7, the first polarization beam splitter 420 may include an infrared reflective layer and a polarization beam splitter layer. The polarization splitting layer may reflect the first polarized light and transmit the second polarized light. The infrared reflective layer can reflect infrared light and transmit light having a wavelength different from that of infrared light, such as visible light. According to wavelength division, the first polarized light can include the first polarized infrared light and the first polarized visible light, and the second polarized light can include the second polarized infrared light and the second polarized visible light. The first polarized infrared light and the second polarized infrared light belong to Infrared light, first polarized visible light and second polarized visible light belong to visible light. It should be understood that the infrared reflective layer and the polarization splitting layer shown in FIG. 7 are only structural schematic diagrams. Since the thickness of the infrared reflective layer and the polarization beam splitting layer is relatively thin, the refraction of light in the infrared reflective layer and the polarization beam splitting layer can be ignored.
在红外光从红外反射层侧入射至第一偏振分光器420的情况下，红外光可以在红外反射层发生反射。在红外光从偏振分光层侧入射至第一偏振分光器420的情况下，红外光中的第二偏振红外光可以穿过偏振分光层，并在红外反射层发生反射；红外光中的第一偏振红外光可以在偏振分光层发生反射。In the case where infrared light enters the first polarization beam splitter 420 from the infrared reflective layer side, the infrared light may be reflected on the infrared reflective layer. When infrared light enters the first polarization beam splitter 420 from the polarization splitting layer side, the second polarized infrared light in the infrared light can pass through the polarization splitting layer and be reflected on the infrared reflective layer; Polarized infrared light can be reflected on the polarization beam splitting layer.
在第一偏振光从偏振分光层侧入射至第一偏振分光器420的情况下，第一偏振光可以在偏振分光层发生反射。在第一偏振光从红外反射层侧入射至第一偏振分光器420的情况下，第一偏振光中的第一偏振可见光可以穿过红外反射层，并在偏振分光层发生反射；第一偏振光中的第一偏振红外光可以在红外反射层发生反射。In the case where the first polarized light enters the first polarizing beam splitter 420 from the polarizing light splitting layer side, the first polarized light may be reflected on the polarizing light splitting layer. When the first polarized light enters the first polarization beam splitter 420 from the infrared reflective layer side, the first polarized visible light in the first polarized light can pass through the infrared reflective layer and be reflected on the polarized beam splitter; The first polarized infrared light in the light can be reflected on the infrared reflective layer.
因此，红外光从偏振分光层入射，会出现红外光的一部分在红外反射层发生反射，红外光的另一部分在偏振分光层发生反射，从而红外光的反射可能出现错位、偏差。类似地，第一偏振光从红外反射层侧入射，第一偏振光的反射也可能出现错位、偏差。一种可能的情况，在满足第一偏振分光器420的使用效果的情况下，红外反射层、偏振分光层的厚度越薄，光的两个部分分别在红外反射层、偏振分光层反射所导致的偏差越小。另一种可能的情况，来自第一光处理器410的第一偏振光可以从偏振分光层侧入射至第一偏振分光器420，来自成像透镜450的红外光可以从红外反射层侧入射至第一偏振分光器420，从而可以减少光分别在红外反射层、偏振分光层反射所导致的偏差。也就是说，红外反射层可以位于第一偏振分光器420的第二侧B。Therefore, when infrared light is incident from the polarization beam splitting layer, part of the infrared light will be reflected on the infrared reflective layer, and another part of the infrared light will be reflected on the polarization beam splitting layer, so that the reflection of infrared light may be misaligned or deviated. Similarly, the first polarized light is incident from the infrared reflective layer side, and the reflection of the first polarized light may also be misaligned or deviated. A possible situation, in the case of satisfying the use effect of the first polarization beam splitter 420, the thinner the thickness of the infrared reflection layer and the polarization beam splitting layer, the two parts of the light are caused by the reflection of the infrared reflection layer and the polarization beam splitting layer respectively. The smaller the deviation. In another possible situation, the first polarized light from the first optical processor 410 may be incident on the first polarizing beam splitter 420 from the side of the polarization splitting layer, and the infrared light from the imaging lens 450 may be incident on the side of the infrared reflecting layer into the second polarization beam splitter. A polarization beam splitter 420 can reduce the deviation caused by light reflection on the infrared reflective layer and the polarization beam splitter layer respectively. That is, the infrared reflective layer may be located on the second side B of the first polarization beam splitter 420.
经第一偏振分光器420的第二侧B反射的红外光可以射入图像传感器440。因此，成像透镜450可以将用户在投影图像上所指示的位置403成像在图像传感器440上。也就是说，来自投影区域402的红外光可以穿过成像透镜450投影在图像传感器440上。因此，投影区域402与图像传感器440满足物像共轭关系。The infrared light reflected by the second side B of the first polarization beam splitter 420 may be incident on the image sensor 440. Therefore, the imaging lens 450 can image the position 403 indicated by the user on the projection image on the image sensor 440. That is, the infrared light from the projection area 402 may pass through the imaging lens 450 and be projected on the image sensor 440. Therefore, the projection area 402 and the image sensor 440 satisfy the object-image conjugate relationship.
由于投影区域402与图像传感器440满足物像共轭关系，因此可以通过图像传感器440采集红外光，确定用户在投影图像上所指示的位置403。又由于第一光阀430与投影区域402满足物像共轭关系，第一光阀430可以采集在投影区域402内的投影图像。因此，图像处理器(图4-图6未示出)根据图像传感器440采集到的采集结果以及第一光阀430采集到的采集结果，确定用户在投影图像上的指示位置。Since the projection area 402 and the image sensor 440 satisfy the object-image conjugate relationship, the infrared light can be collected by the image sensor 440 to determine the position 403 indicated by the user on the projected image. In addition, since the first light valve 430 and the projection area 402 satisfy the object-image conjugate relationship, the first light valve 430 can collect the projection image in the projection area 402. Therefore, the image processor (not shown in FIGS. 4 to 6) determines the user's indicated position on the projection image according to the collection result collected by the image sensor 440 and the collection result collected by the first light valve 430.
本申请实施例还提供的一种投影交互的方法。执行方法800的装置例如可以是本申请提供的投影设备。An embodiment of the present application also provides a method for projection interaction. The device for executing the method 800 may be, for example, the projection device provided in this application.
801，获取射入投影设备的红外光的采集结果。801: Acquire a collection result of infrared light incident on the projection device.
根据上文阐述的内容，射入投影设备的红外光可以是由红外线遥控器发出的、经所述投影区域反射的红外光。射入投影设备的红外光还可以是杆件上的红外线光源发出的红外光。射入投影设备的红外光还可以是投影区域以及手指反射的红外光。射入投影设备的红外光还可以是投影区域以及杆件反射的红外光。According to the content set forth above, the infrared light incident on the projection device may be infrared light emitted by an infrared remote control and reflected by the projection area. The infrared light incident on the projection device may also be the infrared light emitted by the infrared light source on the rod. The infrared light incident on the projection device may also be the infrared light reflected by the projection area and the finger. The infrared light incident on the projection device may also be the infrared light reflected by the projection area and the rod.
采集红外光的装置例如可以是投影设备401中的图像传感器440。获取该采集结果可以是获取由图像传感器440采集的数据。The device for collecting infrared light may be, for example, the image sensor 440 in the projection device 401. Obtaining the collection result may be obtaining data collected by the image sensor 440.
可选的，所述红外光由手持红外线光源射出。Optionally, the infrared light is emitted from a handheld infrared light source.
手持红外线光源例如可以是红外线遥控器。红外线遥控器射出的红外光可以经投影区域反射至投影设备。The hand-held infrared light source may be an infrared remote control, for example. The infrared light emitted by the infrared remote control can be reflected to the projection device through the projection area.
手持红外线光源又如可以是设置在手持杆件远离手的一端的红外线光源。The hand-held infrared light source can also be an infrared light source arranged at the end of the hand-held rod away from the hand.
802，根据所述采集结果以及所述投影设备的投影图像，确定所述用户在所述投影图像上的指示位置。802. Determine a position indicated by the user on the projection image according to the collection result and the projection image of the projection device.
图8、图9是本申请实施例提供的一种用户在投影图像上的指示的示意图。Figures 8 and 9 are schematic diagrams of a user's instruction on a projected image provided by an embodiment of the present application.
首先，投影设备401获取可被投影在投影区域402内的目标图像901。在一种可能的情况中，投影设备401可以将该目标图像901的一部分投影在投影区域402。如图8所示，目标图像901中位于虚线矩形框902内的部分可以是投影设备401当前投影在投影区域402内的投影图像；而目标图像901中位于虚线矩形框902以外的部分，可以未被投影设备401投影在投影区域402内。First, the projection device 401 acquires a target image 901 that can be projected in the projection area 402. In a possible situation, the projection device 401 may project a part of the target image 901 on the projection area 402. As shown in Figure 8, the part of the target image 901 located within the dotted rectangular frame 902 may be the projected image currently projected by the projection device 401 in the projection area 402; and the part of the target image 901 located outside the dotted rectangular frame 902 may not be The projection device 401 is projected in the projection area 402.
然后，投影设备401根据需要投影在投影区域402内的投影图像，可以驱动第一光处理器发光，使得包含有投影图像的光可以入射至第一光阀430，因此第一光阀430可以捕获到投影区域402内的投影图像。图8、图9中的903可以表示照射在第一光阀430上的投影图像。Then, the projection device 401 can drive the first light processor to emit light as needed to project the projected image in the projection area 402, so that the light containing the projected image can be incident on the first light valve 430, so the first light valve 430 can capture To the projection image within the projection area 402. 903 in FIG. 8 and FIG. 9 may represent a projection image irradiated on the first light valve 430.
之后，第一光阀430射出的光可以射出该投影设备401并投影在投影区域402内。图9中的904可以表示投影在投影区域402内的投影图像。如上文所述，用户可以借助远手端设置有红外线光源的手持杆件、红外线遥控器、手、手持杆件等，通过在该投影图像内指示，实现与投影设备401的交互。图8、图9示出了使用红外线遥控器461与投影设备401进行交互的示例。图9中的黑色圆点905可以是当前用户在该投影图像内的指示位置。After that, the light emitted by the first light valve 430 can be emitted from the projection device 401 and projected in the projection area 402. 904 in FIG. 9 may represent a projection image projected in the projection area 402. As described above, the user can use a hand-held rod with an infrared light source provided at the distal end, an infrared remote control, a hand, a hand-held rod, etc., to achieve interaction with the projection device 401 by indicating in the projected image. 8 and 9 show examples of using the infrared remote controller 461 to interact with the projection device 401. The black dot 905 in FIG. 9 may be the current user's indicated position in the projected image.
再然后，自投影区域402上的指示位置905射出的红外光可以射入投影设备401，并到达图像传感器440。图9中906可以表示图像传感器440所采集到的用户的指示位置。其中，在图8、图9中，位于图像传感器440内的虚线与投影图像的轮廓相对应。Then, the infrared light emitted from the indicated position 905 on the projection area 402 can enter the projection device 401 and reach the image sensor 440. 906 in FIG. 9 may represent the user's indicated position collected by the image sensor 440. Among them, in FIGS. 8 and 9, the dashed line in the image sensor 440 corresponds to the outline of the projected image.
综上，如图9所示，投影设备401可以将第一光阀430上的投影图像903与图像传感器440所采集到的指示位置906进行叠加，确定用户在投影图像上的指示位置。In summary, as shown in FIG. 9, the projection device 401 can superimpose the projection image 903 on the first light valve 430 with the indication position 906 collected by the image sensor 440 to determine the user's indication position on the projection image.
可选的，所述获取红外光的采集结果，包括：获取多个所述采集结果；所述根据所述采集结果以及所述投影设备的投影图像，确定所述用户在所述投影图像上的指示位置，包括：根据所述多个所述采集结果以及所述投影设备的投影图像，确定用户手势以及所述用户手势在所述投影图像上的相对位置；所述方法还包括：根据所述用户手势以及所述相对位置，执行目标操作。Optionally, said obtaining the collection result of infrared light includes: obtaining a plurality of said collection results; said determining the user’s position on the projection image based on the collection result and the projection image of the projection device Indicating a position includes: determining a user gesture and a relative position of the user gesture on the projected image according to the multiple collection results and the projection image of the projection device; the method further includes: according to the The user gesture and the relative position perform the target operation.
也就是说，通过多次采集红外光，可以将用户在投影图像上的多个指示位置连在一起，从而确定用户的手势。再根据该多个指示位置中的至少一个，确定该用户手势相对于投影图像的位置。下面通过图10至图13举例说明用户手势、用户手势在投影图像上的相对位置以及目标操作。In other words, by collecting infrared light multiple times, multiple indication positions of the user on the projected image can be connected together to determine the user's gesture. Then, according to at least one of the multiple indication positions, the position of the user gesture relative to the projected image is determined. The following uses FIGS. 10 to 13 to illustrate the user gesture, the relative position of the user gesture on the projected image, and the target operation.
图10示出了用户在投影图像上做出移动手势的示例。首先，用户在投影图像上的指示位置可以发生移动。通过多次采集红外光，可以得到用户在投影图像上的多个指示位置近似位于直线上，进而判断用户做出移动手势，以及该移动手势的移动方向。图10中的黑色圆点可以表示用户在投影图像上的指示位置。填充有斜线并指示该黑色圆点的箭头可 以表示该指示位置的移动方向。投影设备可以根据该指示位置的移动方向和移动位移，更新目标图像(如图10中的目标图像1001)中用于投影在投影区域402的待投影部分，并将更新后的待投影部分投影在投影区域402内。例如，用户在投影图像上的指示位置向右移动，目标图像的待投影部分可以是位于当前投影图像左侧的图像。最终，用户可以在投影区域402内观察到，投影区域402内的图像可以跟随用户的指示位置而移动。FIG. 10 shows an example in which the user makes a movement gesture on the projected image. First, the user's indicated position on the projected image can move. By collecting infrared light multiple times, it can be obtained that the multiple indication positions of the user on the projected image are approximately on a straight line, and then it is determined that the user makes a movement gesture and the movement direction of the movement gesture. The black circle in FIG. 10 can indicate the user's pointing position on the projected image. The arrow filled with a diagonal line and indicating the black dot can indicate the moving direction of the indicated position. The projection device can update the part to be projected in the projection area 402 in the target image (target image 1001 in FIG. 10) according to the moving direction and displacement of the indicated position, and project the updated part to be projected on Within the projection area 402. For example, the user's indicated position on the projected image moves to the right, and the part of the target image to be projected may be the image located on the left side of the current projected image. Finally, the user can observe in the projection area 402, and the image in the projection area 402 can move following the position indicated by the user.
在一个示例中，用户可以借助红外线遥控器朝投影区域402发射红外光，并移动红外光在投影图像上的投射位置。投影设备可以根据红外光在投影区域402上的滑动轨迹，更新投影区域402内的投影图像，以执行与移动手势相关的操作。In an example, the user can use an infrared remote control to emit infrared light toward the projection area 402 and move the projection position of the infrared light on the projected image. The projection device can update the projected image in the projection area 402 according to the sliding track of the infrared light on the projection area 402 to perform operations related to the movement gesture.
在一个示例中，投影设备还包括向投影区域402发射红外光的红外线光源。用户的手指可以在投影图像上滑动。投影设备可以根据手指在投影区域402上的滑动轨迹，更新投影区域402内的投影图像，以执行与移动手势相关的操作。In an example, the projection device further includes an infrared light source that emits infrared light to the projection area 402. The user's finger can slide on the projected image. The projection device can update the projection image in the projection area 402 according to the sliding track of the finger on the projection area 402 to perform operations related to the movement gesture.
在一个示例中，投影设备还包括向投影区域402发射红外光的红外线光源。用户可以借助手持杆件在投影图像上指示，并移动手持杆件远离手的一端。投影设备可以根据手持杆件的远手端在投影区域402上的滑动轨迹，更新投影区域402内的投影图像，以执行与移动手势相关的操作。In an example, the projection device further includes an infrared light source that emits infrared light to the projection area 402. The user can use the hand-held rod to indicate on the projected image and move the end of the hand-held rod away from the hand. The projection device can update the projected image in the projection area 402 according to the sliding track of the distal end of the handheld rod on the projection area 402 to perform operations related to the movement gesture.
在一个示例中，用户可以借助包括红外线光源的手持杆件，并移动该红外线光源。投影设备可以根据手持杆件上的红外线光源在投影区域402上的滑动轨迹，更新投影区域402内的投影图像，以执行与移动手势相关的操作。In one example, the user can move the infrared light source with the help of a hand-held rod including an infrared light source. The projection device can update the projected image in the projection area 402 according to the sliding track of the infrared light source on the handheld rod on the projection area 402 to perform operations related to the movement gesture.
图11示出了用户在投影图像上做出点击手势的示例。首先，用户可以在投影图像上指示。图11中的黑色圆点可以表示用户在投影图像上的指示位置。通过多次采集红外光，可以得到用户在投影图像上的多个指示位置集中在目标区域1101内，进而判断用户做出点击手势。该投影图像上的目标区域1101可以与目标地址对应。在该指示位置停留在该目标区域1101的情况下，投影设备可以访问该目标地址，并将访问结果1102投影在投影区域402内。因此，当用户在投影图像上的指示位置停留在投影图像上的目标区域1101时，可以认为用户在点击该目标区域1101。最终，用户可以通过点击手势，在投影区域402内观察到与目标区域1101对应的访问结果1102。FIG. 11 shows an example in which the user makes a tap gesture on the projected image. First, the user can indicate on the projected image. The black circle in FIG. 11 can indicate the user's pointing position on the projected image. By collecting infrared light multiple times, it can be obtained that the multiple indicated positions of the user on the projected image are concentrated in the target area 1101, and then it is determined that the user makes a click gesture. The target area 1101 on the projected image may correspond to the target address. In the case where the indicated position stays in the target area 1101, the projection device can access the target address and project the access result 1102 in the projection area 402. Therefore, when the user's indicated position on the projected image stays on the target area 1101 on the projected image, it can be considered that the user is clicking on the target area 1101. Finally, the user can observe the visit result 1102 corresponding to the target area 1101 in the projection area 402 through a tap gesture.
在一个示例中，用户可以借助红外线遥控器朝投影区域402发射红外光，并使红外光的投射位置停留在投影图像中的目标区域1101内。投影设备可以根据红外光在投影区域402上的投射位置，确定用户在投影图像中的点击位置，以执行与点击手势相关的操作。In an example, the user can use an infrared remote control to emit infrared light toward the projection area 402, and make the projection position of the infrared light stay in the target area 1101 in the projected image. The projection device can determine the user's click position in the projected image according to the projection position of the infrared light on the projection area 402 to perform operations related to the click gesture.
在一个示例中，投影设备还包括向投影区域402发射红外光的红外线光源。用户的手指可以停留在投影图像中的目标区域1101内。投影设备可以根据手指停留的位置，确定用户在投影图像中的停留位置，以执行与点击手势相关的操作。In an example, the projection device further includes an infrared light source that emits infrared light to the projection area 402. The user's finger can stay in the target area 1101 in the projected image. The projection device can determine the location of the user in the projected image according to the location of the finger to perform operations related to the tap gesture.
在一个示例中，投影设备还包括向投影区域402发射红外光的红外线光源。用户可以借助手持杆件在投影图像上指示，并使手持杆件远离手的一端停留在投影图像中的目标区域1101内。投影设备可以根据手持杆件的远手端在投影区域402上的停留位置，确定用户在投影图像中的点击位置，以执行与点击手势相关的操作。In an example, the projection device further includes an infrared light source that emits infrared light to the projection area 402. The user can use the hand-held rod to indicate on the projected image, and make the end of the hand-held rod away from the hand stay in the target area 1101 in the projected image. The projection device can determine the user's click position in the projected image according to the stay position of the distal end of the hand-held rod on the projection area 402 to perform operations related to the click gesture.
在一个示例中，用户可以借助包括红外线光源的手持杆件，并使该红外线光源停留在投影图像中的目标区域1101内。投影设备可以根据手持杆件上的红外线光源在投影区域402上的停留位置，确定用户在投影图像中的点击位置，以执行与点击手势相关的操作。In an example, the user can use a hand-held rod that includes an infrared light source and make the infrared light source stay in the target area 1101 in the projected image. The projection device can determine the user's click position in the projected image according to the position of the infrared light source on the handheld rod on the projection area 402 to perform operations related to the click gesture.
图12示出了用户在投影图像上做出放大手势的示例。首先，用户可以在投影图像上指示，并且顺时针移动投影图像上的指示位置。通过多次采集红外光，可以得到用户在投影图像上的多个指示位置顺时针地依次出现在圆弧上，进而判断用户做出放大手势。图12中的黑色圆点可以表示用户在投影图像上的指示位置。图12中的圆弧虚线可以表示沿顺时针方向移动该指示位置。图12中填充有斜线的圆点可以表示经顺时针移动后的指示位置。因此，当用户在投影图像上的指示位置在投影图像上顺时针移动(近似)一周后，用户可以在投影区域402内观察到放大后的投影图像。FIG. 12 shows an example in which the user makes a zoom-in gesture on the projected image. First, the user can point on the projected image and move the pointing position on the projected image clockwise. By collecting infrared light multiple times, it can be obtained that the multiple indication positions of the user on the projected image appear on the arc in a clockwise direction, and then it is determined that the user makes a zooming gesture. The black circle in FIG. 12 may indicate the user's indicated position on the projected image. The dashed circular arc in FIG. 12 may indicate that the indicated position is moved in a clockwise direction. The dots filled with oblique lines in FIG. 12 can indicate the indicated position after being moved clockwise. Therefore, after the user's indicated position on the projected image moves (approximately) one circle clockwise on the projected image, the user can observe the enlarged projected image in the projection area 402.
在一个示例中，用户可以借助红外线遥控器朝投影区域402发射红外光，并使红外光的投射位置在投影图像上顺时针移动一周。投影设备可以根据红外光的投射位置在投影图像上的移动轨迹，执行与放大手势相关的操作。In an example, the user can use an infrared remote control to emit infrared light toward the projection area 402, and make the projection position of the infrared light move one circle clockwise on the projected image. The projection device can perform operations related to the magnification gesture according to the movement track of the projection position of the infrared light on the projection image.
在一个示例中，投影设备还包括向投影区域402发射红外光的红外线光源。用户的手指可以在投影图像上顺时针移动一周。投影设备可以根据手指在投影图像上的移动轨迹，执行与放大手势相关的操作。In an example, the projection device further includes an infrared light source that emits infrared light to the projection area 402. The user's finger can move clockwise on the projected image one week. The projection device can perform operations related to the zooming gesture according to the movement track of the finger on the projected image.
在一个示例中，投影设备还包括向投影区域402发射红外光的红外线光源。用户可以借助手持杆件在投影图像上指示，并使手持杆件远离手的一端在投影图像上顺时针移动一周。投影设备可以根据手持杆件的远手端在投影区域402上的移动轨迹，执行与放大手势相关的操作。In an example, the projection device further includes an infrared light source that emits infrared light to the projection area 402. The user can use the hand-held rod to indicate on the projected image, and move the end of the hand-held rod away from the hand clockwise on the projected image. The projection device can perform operations related to the magnification gesture according to the movement track of the distal end of the hand-held rod on the projection area 402.
在一个示例中，用户可以借助包括红外线光源的手持杆件，并使该红外线光源在投影图像上顺时针移动一周。投影设备可以根据手持杆件上的红外线光源在投影区域402上的移动轨迹，执行与放大手势相关的操作。In one example, the user can use a hand-held rod that includes an infrared light source, and make the infrared light source move clockwise on the projected image one circle. The projection device can perform operations related to the magnification gesture according to the movement track of the infrared light source on the handheld rod on the projection area 402.
图13示出了用户在投影图像上做出缩小手势的示例。首先，用户可以在投影图像上指示，并且逆时针移动投影图像上的指示位置。通过多次采集红外光，可以得到用户在投影图像上的多个指示位置逆时针地依次出现在圆弧上，进而判断用户做出放大手势。图13中的黑色圆点可以表示用户在投影图像上的指示位置。图13中的圆弧虚线可以表示沿逆时针方向移动该指示位置。图13中填充有斜线的圆点可以表示经逆时针移动后的指示位置。因此，当用户在投影图像上的指示位置在投影图像上逆时针移动(近似)一周后，用户可以在投影区域402内观察到缩小后的投影图像。FIG. 13 shows an example in which the user makes a zoom out gesture on the projected image. First, the user can point on the projected image and move the pointing position on the projected image counterclockwise. By collecting infrared light multiple times, it can be obtained that the multiple indicated positions of the user on the projected image appear counterclockwise on the arc in turn, and then it is determined that the user has made a magnifying gesture. The black circle in FIG. 13 can indicate the user's pointing position on the projected image. The dashed circular arc in FIG. 13 may indicate that the indicated position is moved in the counterclockwise direction. The dots filled with oblique lines in FIG. 13 can indicate the indicated position after being moved counterclockwise. Therefore, after the user's indicated position on the projected image moves (approximately) one round counterclockwise on the projected image, the user can observe the reduced projected image in the projection area 402.
在一个示例中，用户可以借助红外线遥控器朝投影区域402发射红外光，并使红外光的投射位置在投影图像上逆时针移动一周。投影设备可以根据红外光的投射位置在投影图像上的移动轨迹，执行与缩小手势相关的操作。In an example, the user can emit infrared light toward the projection area 402 by means of an infrared remote control, and move the projection position of the infrared light on the projected image counterclockwise for one circle. The projection device can perform operations related to the zoom-out gesture according to the movement track of the projection position of the infrared light on the projection image.
在一个示例中，投影设备还包括向投影区域402发射红外光的红外线光源。用户的手指可以在投影图像上逆时针移动一周。投影设备可以根据手指在投影图像上的移动轨迹，执行与缩小手势相关的操作。In an example, the projection device further includes an infrared light source that emits infrared light to the projection area 402. The user's finger can move one circle counterclockwise on the projected image. The projection device can perform operations related to the zoom-out gesture according to the movement track of the finger on the projected image.
在一个示例中，投影设备还包括向投影区域402发射红外光的红外线光源。用户可以借助手持杆件在投影图像上指示，并使手持杆件远离手的一端在投影图像上逆时针移动一周。投影设备可以根据手持杆件的远手端在投影区域402上的移动轨迹，执行与缩小手势相关的操作。In an example, the projection device further includes an infrared light source that emits infrared light to the projection area 402. The user can use the hand-held rod to indicate on the projected image, and make the end of the hand-held rod away from the hand move one round counterclockwise on the projected image. The projection device can perform operations related to the zoom-out gesture according to the movement track of the distal end of the hand-held rod on the projection area 402.
在一个示例中，用户可以借助包括红外线光源的手持杆件，并使该红外线光源在投影图像上逆时针移动一周。投影设备可以根据手持杆件上的红外线光源在投影区域402上的 移动轨迹，执行与缩小手势相关的操作。In one example, the user can use a hand-held rod that includes an infrared light source and move the infrared light source one week counterclockwise on the projected image. The projection device can perform operations related to the zoom-out gesture according to the movement track of the infrared light source on the handheld rod on the projection area 402.
应理解，本申请实施例对于上述移动手势、点击手势、放大手势、缩小手势的具体形式不作限定。例如，上述放大手势还可以是增大两个手指之间的间距。又如，上述缩小手势还可以是缩小两个手指之间的间距。可以理解的是，图10至图13所示的实施例仅是为了帮助本领域技术人员更好地理解本申请的技术方案，而并非是对本申请技术方案的限制。在受益于前述描述和相关附图中呈现的指导启示下，本领域技术人员将会想到本申请的许多改进和其他实施例。因此，应理解，本申请不限于所公开的特定实施例。It should be understood that the embodiments of the present application do not limit the specific forms of the aforementioned movement gesture, tap gesture, zoom-in gesture, and zoom-out gesture. For example, the aforementioned zoom-in gesture may also increase the distance between two fingers. For another example, the aforementioned zoom-out gesture may also be to narrow the distance between two fingers. It is understandable that the embodiments shown in FIGS. 10 to 13 are only for helping those skilled in the art to better understand the technical solutions of the present application, and are not intended to limit the technical solutions of the present application. Benefiting from the guidance presented in the foregoing description and related drawings, those skilled in the art will think of many improvements and other embodiments of the present application. Therefore, it should be understood that the present application is not limited to the specific embodiments disclosed.
对于图4所示的投影设备401，在第一偏振分光器420上设置有红外反射层，使得来自成像透镜450的大部分红外光可以经第一偏振分光器420反射至图像传感器440。因此，红外光到达图像传感器440的光强可以较高。投影设备可以具有更强的能力，以适应射入投影设备的红外光的光强相对较弱的场景。For the projection device 401 shown in FIG. 4, an infrared reflective layer is provided on the first polarization beam splitter 420 so that most of the infrared light from the imaging lens 450 can be reflected to the image sensor 440 through the first polarization beam splitter 420. Therefore, the intensity of infrared light reaching the image sensor 440 may be higher. The projection device may have stronger capabilities to adapt to scenarios where the intensity of the infrared light incident on the projection device is relatively weak.
图像传感器采集红外光，可以减少可见光的误采集，减少投影设备捕获到的用户操作与用户实际作出的操作之间的偏差。因此，在投影设备可以相对准确地捕获用户操作的情况下，投影设备更容易适应多种人机交互场景。例如，用户可以在距离投影区域相对较远的位置与投影设备进行交互；又如，投影设备与投影区域的距离可以相对较远；再如，用户可以使用多种媒介(手、物品等)与投影设备进行交互。The image sensor collects infrared light, which can reduce the false collection of visible light and reduce the deviation between the user operation captured by the projection device and the operation actually performed by the user. Therefore, when the projection device can relatively accurately capture user operations, the projection device is easier to adapt to a variety of human-computer interaction scenarios. For example, the user can interact with the projection device at a relatively far distance from the projection area; for another example, the distance between the projection device and the projection area can be relatively long; for another example, the user can use a variety of media (hands, objects, etc.) to interact with The projection device interacts.
为了便于描述，下面基于图4所示的应用场景，详细描述本申请提供的其他投影设备的实施例。在受益于前述描述和相关附图中呈现的指导启示下，本领域技术人员将会想到本申请的许多改进和其他实施例。因此，应理解，本申请不限于所公开的特定实施例。For ease of description, the following describes in detail the embodiments of other projection devices provided in this application based on the application scenario shown in FIG. 4. Benefiting from the guidance presented in the foregoing description and related drawings, those skilled in the art will think of many improvements and other embodiments of the present application. Therefore, it should be understood that the present application is not limited to the specific embodiments disclosed.
在图4所示的实施例中，第一偏振分光器420包括红外反射层，可以反射第一偏振光、红外光，透射除第一偏振光、红外光以外的其他光。图14是本申请提供的另一种投影设备的结构性示意图。与图4所示的投影设备401相比，图14所示的第一偏振分光器1420可以反射第一偏振光、透射第二偏振光，可以不包括红外反射层。因此，与图4所示的投影设备401相比，图14所示的投影设备1401还包括设置在第一偏振分光器1420与成像透镜1450之间的第一红外偏振转换器1460。第一红外偏振转换器1460例如可以是第一偏振转换器。该第一偏振转换器可以将该第一偏振转换器的入射光转换为第一偏振光。例如，入射至第一偏振转换器的光包括第一偏振光以及第二偏振光，第一偏振转换器可以将入射的第二偏振光转换为第一偏振光，并透射入射的第一偏振光。来自成像透镜1450的红外光可以穿过第一红外偏振转换器1460，并入射至第一偏振分光器1420的第二侧B。因此，来自成像透镜1450的红外光可以并被第一红外偏振转换器1460转换为第一偏振红外光，第一偏振红外光属于第一偏振光。In the embodiment shown in FIG. 4, the first polarization beam splitter 420 includes an infrared reflective layer, which can reflect the first polarized light and infrared light, and transmit other light except the first polarized light and infrared light. Fig. 14 is a schematic structural diagram of another projection device provided by the present application. Compared with the projection device 401 shown in FIG. 4, the first polarization beam splitter 1420 shown in FIG. 14 can reflect the first polarized light and transmit the second polarized light, and may not include an infrared reflective layer. Therefore, compared with the projection device 401 shown in FIG. 4, the projection device 1401 shown in FIG. 14 further includes a first infrared polarization converter 1460 disposed between the first polarization beam splitter 1420 and the imaging lens 1450. The first infrared polarization converter 1460 may be, for example, a first polarization converter. The first polarization converter can convert the incident light of the first polarization converter into the first polarized light. For example, the light incident to the first polarization converter includes the first polarized light and the second polarized light. The first polarization converter can convert the incident second polarized light into the first polarized light and transmit the incident first polarized light. . The infrared light from the imaging lens 1450 may pass through the first infrared polarization converter 1460 and be incident to the second side B of the first polarization beam splitter 1420. Therefore, the infrared light from the imaging lens 1450 can be converted into the first polarized infrared light by the first infrared polarization converter 1460, and the first polarized infrared light belongs to the first polarized light.
对于图14所示的投影设备1401，通过在第一偏振分光器1420与成像透镜1450之间设置第一红外偏振转换器1460，使得到达第一偏振分光器1420的红外光属于第一偏振光，从而来自成像透镜1450的大部分红外光可以经第一偏振分光器1420反射至图像传感器1440。因此，红外光到达图像传感器1440的光强可以较高。For the projection device 1401 shown in FIG. 14, the first infrared polarization converter 1460 is arranged between the first polarization beam splitter 1420 and the imaging lens 1450, so that the infrared light reaching the first polarization beam splitter 1420 belongs to the first polarization light, Therefore, most of the infrared light from the imaging lens 1450 can be reflected to the image sensor 1440 through the first polarization beam splitter 1420. Therefore, the intensity of infrared light reaching the image sensor 1440 can be higher.
图15是本申请提供的一种投影设备的结构性示意图。投影设备1501可以是如图1至图3中的投影设备110。投影设备1501发出的光可以投影在投影区域1502，从而在该投影区域1502上可以显示有图像。投影区域1502可以是如图1至图3中的投影区域120。FIG. 15 is a schematic structural diagram of a projection device provided by the present application. The projection device 1501 may be the projection device 110 as shown in FIGS. 1 to 3. The light emitted by the projection device 1501 can be projected on the projection area 1502, so that an image can be displayed on the projection area 1502. The projection area 1502 may be the projection area 120 as shown in FIGS. 1 to 3.
投影设备1501可以包括第一光处理器1510、第一偏振分光器1521、第二偏振分光器 1522、第三偏振分光器1523，第一光阀1531、第二光阀1532、第三光阀1533，合光器1570、成像透镜1550以及图像传感器1540。The projection device 1501 may include a first light processor 1510, a first polarization beam splitter 1521, a second polarization beam splitter 1522, a third polarization beam splitter 1523, a first light valve 1531, a second light valve 1532, and a third light valve 1533 , The light combiner 1570, the imaging lens 1550, and the image sensor 1540.
第一光处理器1510可以射出第一偏振可见光。该第一偏振可见光属于第一偏振光。第一偏振光例如可以是P偏振光或S偏振光。第一偏振可见光的波长可以是第一波长。因此，第一偏振可见光可以是第一波长的第一偏振光。第一光处理器1510还可以射出第二波长的第一偏振光、第三波长的第一偏振光。第一波长例如可以在625～740nm范围内。第二波长例如可以在440～475nm范围内。第三波长例如可以在492～577nm范围内。因此，第一光处理器1510发出的光包含投影图像中与第一波长相关的图像信息、与第二波长相关的图像信息、与第三波长相关的图像信息。应理解，本申请对于第一波长、第二波长、第三波长的波长范围不作限定。The first light processor 1510 can emit the first polarized visible light. The first polarized visible light belongs to the first polarized light. The first polarized light may be P-polarized light or S-polarized light, for example. The wavelength of the first polarized visible light may be the first wavelength. Therefore, the first polarized visible light may be the first polarized light of the first wavelength. The first optical processor 1510 may also emit first polarized light of the second wavelength and first polarized light of the third wavelength. The first wavelength may be in the range of 625 to 740 nm, for example. The second wavelength may be in the range of 440 to 475 nm, for example. The third wavelength may be in the range of 492 to 577 nm, for example. Therefore, the light emitted by the first light processor 1510 includes image information related to the first wavelength, image information related to the second wavelength, and image information related to the third wavelength in the projected image. It should be understood that this application does not limit the wavelength ranges of the first wavelength, the second wavelength, and the third wavelength.
应理解，在本申请中，在没有特殊声明的情况下，“波长”可以理解为数值为A的波长，还可以理解为范围为B～C的波长。It should be understood that, in this application, without special statement, "wavelength" can be understood as a wavelength with a value of A, and can also be understood as a wavelength ranging from B to C.
第一偏振分光器1521、第二偏振分光器1522、第三偏振分光器1523均可以反射第一偏振光，并透射第二偏振光，第一偏振光的偏振方向垂直于第二偏振光的偏振方向。The first polarization beam splitter 1521, the second polarization beam splitter 1522, and the third polarization beam splitter 1523 can both reflect the first polarized light and transmit the second polarized light. The polarization direction of the first polarized light is perpendicular to the polarization of the second polarized light. direction.
来自第一光处理器1510的第一波长的第一偏振光可以入射至第一偏振分光器1521的第一侧A。经第一偏振分光器1521反射的第一波长的第一偏振光可以垂直射入第一光阀1531。第一光阀1531可以采集入射的第一波长的第一偏振光，将入射的第一波长的第一偏振光转变为第一波长的第二偏振光，并垂直射出该第一波长的第二偏振光。根据光的可逆性可知，第一光阀1531射出的第一波长的第二偏振光可以入射至第一偏振分光器1521的第一侧A。由于第一偏振分光器1521可以透射第二偏振光，因此来自第一光阀1531的第一波长的第二偏振光可以从第一偏振分光器1521的第一侧A射入，并从第一偏振分光器1521的第二侧B射出。The first polarized light of the first wavelength from the first light processor 1510 may be incident on the first side A of the first polarization beam splitter 1521. The first polarized light of the first wavelength reflected by the first polarizing beam splitter 1521 may vertically enter the first light valve 1531. The first light valve 1531 can collect the incident first polarized light of the first wavelength, convert the incident first polarized light of the first wavelength into the second polarized light of the first wavelength, and emit the second polarized light of the first wavelength vertically. polarized light. According to the reversibility of light, the second polarized light of the first wavelength emitted by the first light valve 1531 can be incident on the first side A of the first polarization beam splitter 1521. Since the first polarizing beam splitter 1521 can transmit the second polarized light, the second polarized light of the first wavelength from the first light valve 1531 can enter from the first side A of the first polarizing beam splitter 1521 and enter from the first side A of the first polarizing beam splitter 1521. The second side B of the polarization beam splitter 1521 is emitted.
来自第一光处理器1510的第二波长的第一偏振光可以入射至第二偏振分光器1522。经第二偏振分光器1522反射的第二波长的第一偏振光可以垂直射入第二光阀1532。第二光阀1532可以采集入射的第二波长的第一偏振光，将入射的第二波长的第一偏振光转变为第二波长的第二偏振光，并垂直射出该第二波长的第二偏振光。根据光的可逆性可知，第二光阀1532射出的第二波长的第二偏振光可以入射至第二偏振分光器1522。由于第二偏振分光器1522可以透射第二偏振光，因此来自第二光阀1532的第二波长的第二偏振光可以透射第二偏振分光器1522。The first polarized light of the second wavelength from the first light processor 1510 may be incident to the second polarization beam splitter 1522. The first polarized light of the second wavelength reflected by the second polarizing beam splitter 1522 may enter the second light valve 1532 perpendicularly. The second light valve 1532 can collect the incident first polarized light of the second wavelength, convert the incident first polarized light of the second wavelength into the second polarized light of the second wavelength, and vertically emit the second polarized light of the second wavelength. polarized light. According to the reversibility of light, the second polarized light of the second wavelength emitted by the second light valve 1532 can be incident on the second polarization beam splitter 1522. Since the second polarization beam splitter 1522 can transmit the second polarization light, the second polarization light of the second wavelength from the second light valve 1532 can transmit the second polarization beam splitter 1522.
来自第一光处理器1510的第三波长的第一偏振光可以入射至第三偏振分光器1523。经第三偏振分光器1523反射的第三波长的第一偏振光可以垂直射入第三光阀1533。第三光阀1533可以采集入射的第三波长的第一偏振光，将入射的第三波长的第一偏振光转变为第三波长的第二偏振光，并垂直射出该第三波长的第二偏振光。根据光的可逆性可知，第三光阀1533射出的第三波长的第二偏振光可以入射至第三偏振分光器1523。由于第三偏振分光器1523可以透射第二偏振光，因此来自第三光阀1533的第三波长的第二偏振光可以透射第三偏振分光器1523。The first polarized light of the third wavelength from the first light processor 1510 may be incident to the third polarization beam splitter 1523. The first polarized light of the third wavelength reflected by the third polarizing beam splitter 1523 may be incident on the third light valve 1533 perpendicularly. The third light valve 1533 can collect the incident first polarized light of the third wavelength, convert the incident first polarized light of the third wavelength into the second polarized light of the third wavelength, and emit the second polarized light of the third wavelength vertically. polarized light. According to the reversibility of light, the second polarized light of the third wavelength emitted by the third light valve 1533 can be incident on the third polarization beam splitter 1523. Since the third polarization beam splitter 1523 can transmit the second polarization light, the second polarization light of the third wavelength from the third light valve 1533 can transmit the third polarization beam splitter 1523.
合光器1570可以汇合来自第一光阀1531、第二光阀1532以及第三光阀1533的光，该汇合后的光可以从合光器1570射出并到达成像透镜1550。从而，投影图像中与第一波长相关的信息、投影图像中与第二波长相关的信息、投影图像中与第三波长相关信息可以 汇合在一起，形成完整的投影图像。因此，经合光器1570汇合后的光可以沿目标方向射出合光器1570。The light combiner 1570 may combine the light from the first light valve 1531, the second light valve 1532, and the third light valve 1533, and the combined light may be emitted from the light combiner 1570 and reach the imaging lens 1550. Therefore, the information related to the first wavelength in the projected image, the information related to the second wavelength in the projected image, and the information related to the third wavelength in the projected image can be combined to form a complete projected image. Therefore, the light converged by the light combiner 1570 can exit the light combiner 1570 in the target direction.
合光器1570可以包括垂直且相交的第一反射层1571以及第二反射层1572。第二反射层1572可以将第一反射层1571划分为第一部分以及第二部分，第一部分的面积与第二部分的面积可以相同或大体相同。第一反射层1571可以将第二反射层1572划分为第三部分以及第四部分，第三部分的面积与第四部分的面积可以相同或大体相同。The light combiner 1570 may include a first reflective layer 1571 and a second reflective layer 1572 that are perpendicular and intersecting. The second reflective layer 1572 may divide the first reflective layer 1571 into a first part and a second part, and the area of the first part and the area of the second part may be the same or substantially the same. The first reflective layer 1571 may divide the second reflective layer 1572 into a third part and a fourth part, and the area of the third part and the area of the fourth part may be the same or substantially the same.
第一反射层1571可以发生反射该第一波长的光以及红外光。第一反射层1571例如可以包括红外反射层。来自第一光阀1531的该第一波长的光入射至第一反射层1571，可以沿该目标方向射出。波长不是第一波长的光，以及不是红外光的光(如第二波长的光、第三波长的光)均可以透射第一反射层1571。例如，第一波长的光可以是红光，第一反射层1571可以反射红光、红外光，并透射绿光、蓝光。The first reflective layer 1571 can reflect light of the first wavelength and infrared light. The first reflective layer 1571 may include an infrared reflective layer, for example. The light of the first wavelength from the first light valve 1531 is incident on the first reflective layer 1571 and can be emitted along the target direction. Light whose wavelength is not the first wavelength and light whose wavelength is not infrared light (such as light of the second wavelength and light of the third wavelength) can transmit through the first reflective layer 1571. For example, the light of the first wavelength may be red light, and the first reflective layer 1571 may reflect red light and infrared light, and transmit green light and blue light.
第二反射层1572可以反射该第二波长的光。来自第二光阀1532的光可以入射至第二反射层1572，并沿该目标方向射出。波长不是该第二波长的光(如第一波长的光、第三波长的光、红外光)可以透射第二反射层1572。例如第二波长的光可以是蓝光，第二反射层1572可以反射蓝光，并透射红光、红外光、绿光。最终，经合光器1570汇合的光可以沿该目标方向射出。The second reflective layer 1572 can reflect light of the second wavelength. The light from the second light valve 1532 may be incident on the second reflective layer 1572 and emitted along the target direction. Light whose wavelength is not the second wavelength (eg, light of the first wavelength, light of the third wavelength, infrared light) may transmit the second reflective layer 1572. For example, the light of the second wavelength may be blue light, and the second reflective layer 1572 may reflect blue light and transmit red light, infrared light, and green light. Finally, the light converged by the light combiner 1570 can be emitted along the target direction.
成像透镜1550可以将投影图像成像在投影区域1502内。也就是说，合光器1570射出的、包含有投影图像信息的光可以穿过成像透镜1550投影在投影区域1502内。由于合光器1570是汇合由第一光阀1531、第二光阀1532以及第三光阀1533射出的光，因此第一光阀1531、第二光阀1532以及第三光阀1533均与投影区域1502满足物像共轭关系。The imaging lens 1550 can image the projected image in the projection area 1502. In other words, the light emitted by the light combiner 1570 and containing projection image information may pass through the imaging lens 1550 and be projected in the projection area 1502. Since the light combiner 1570 combines the light emitted by the first light valve 1531, the second light valve 1532, and the third light valve 1533, the first light valve 1531, the second light valve 1532, and the third light valve 1533 are all connected to the projection The area 1502 satisfies the object-image conjugate relationship.
用户可以在投影区域1502上观察由投影设备1501投影的投影图像。用户在使用投影设备1501的过程中，可以通过在投影区域1502内指示，完成如上文所述的点击手势、放大手势、缩小手势、移动手势等，进而实现与投影设备1501的交互。用户在投影图像上的指示位置可以是如图15中的1503。例如，如图15所示，用户可以通过红外线遥控器1560发射红外光。红外光在投影区域1502内的投影位置可以是用户在投影图像上的指示位置1503。通过停留并维持该红外光在投影区域1502内的投射位置，可以实现点击手势；通过滑动该红外光在投影区域1502内的投射位置，可以实现放大手势、缩小手势、移动手势等。The user can observe the projection image projected by the projection device 1501 on the projection area 1502. In the process of using the projection device 1501, the user can complete the click gesture, zoom-in gesture, zoom-out gesture, and move gesture as described above by indicating in the projection area 1502, so as to realize the interaction with the projection device 1501. The position indicated by the user on the projected image may be 1503 in FIG. 15. For example, as shown in FIG. 15, the user can emit infrared light through an infrared remote controller 1560. The projection position of the infrared light in the projection area 1502 may be the user's pointing position 1503 on the projection image. By staying and maintaining the projection position of the infrared light in the projection area 1502, a click gesture can be realized; by sliding the projection position of the infrared light in the projection area 1502, a zooming in gesture, a zooming out gesture, a moving gesture, etc. can be realized.
用户在投影图像上所指示的位置1503可以通过射入投影设备1501的红外光确定。用户在投影图像上所指示的位置1503可以在成像透镜1550远离投影区域1502的一侧形成实像。根据光的可逆性，红外光可以穿过成像透镜1550到达合光器1570。The position 1503 indicated by the user on the projected image can be determined by the infrared light incident on the projection device 1501. The position 1503 indicated by the user on the projection image may form a real image on the side of the imaging lens 1550 away from the projection area 1502. According to the reversibility of light, infrared light may pass through the imaging lens 1550 to the light combiner 1570.
射入投影设备1501的红外光可以穿过成像透镜1550并沿该目标方向的相反方向入射至合光器1570。由于第一反射层1571可以反射红外光，而第二反射层1572可以透射红外光；又由于来自第一偏振分光器1521的第一波长的光入射至合光器1570，并沿目标方向射出合光器1570。因此，红外光可以在合光器1570的第一反射层1571上发生反射，并可以入射至第一偏振分光器1521。The infrared light incident on the projection device 1501 may pass through the imaging lens 1550 and be incident on the light combiner 1570 in a direction opposite to the target direction. Because the first reflective layer 1571 can reflect infrared light, and the second reflective layer 1572 can transmit infrared light; and because the light of the first wavelength from the first polarization beam splitter 1521 is incident on the light combiner 1570, and is emitted along the target direction. Optical device 1570. Therefore, the infrared light may be reflected on the first reflective layer 1571 of the light combiner 1570, and may be incident on the first polarization beam splitter 1521.
第一偏振分光器1521包括红外反射层，因此第一偏振分光器1521可以反射红外光。经第一偏振分光器1521反射的红外光可以射入图像传感器1540。图像传感器1540可以采集来自第一偏振分光器1521的红外光。由于合光器1570中反射层的反射率相对高于透 射率，因此，通过第一反射层1571反射红外光，使得图像传感器1540可以采集到光强相对更高的红外光。The first polarization beam splitter 1521 includes an infrared reflective layer, so the first polarization beam splitter 1521 can reflect infrared light. The infrared light reflected by the first polarization beam splitter 1521 may be incident on the image sensor 1540. The image sensor 1540 can collect infrared light from the first polarization beam splitter 1521. Since the reflectivity of the reflective layer in the light combiner 1570 is relatively higher than the transmittance, the infrared light is reflected by the first reflective layer 1571, so that the image sensor 1540 can collect infrared light with relatively higher light intensity.
由于投影区域1502与图像传感器1540满足物像共轭关系，因此可以通过图像传感器1540采集红外光，以确定用户的指示位置。又由于第一光阀1531、第二光阀1532、第三光阀1533均与投影区域1502满足物像共轭关系，第一光阀1531、第二光阀1532、第三光阀1533中的一个或多个可以采集在投影区域1502内的投影图像。因此，图像处理器(图15未示出)可以根据图像传感器采集到的采集结果以及光阀采集到的采集结果，确定用户在投影图像上的指示位置。Since the projection area 1502 and the image sensor 1540 satisfy the object-image conjugate relationship, infrared light can be collected by the image sensor 1540 to determine the user's indicated position. Since the first light valve 1531, the second light valve 1532, and the third light valve 1533 all satisfy the object-image conjugate relationship with the projection area 1502, the first light valve 1531, the second light valve 1532, and the third light valve 1533 One or more projection images within the projection area 1502 can be collected. Therefore, the image processor (not shown in FIG. 15) can determine the user's indicated position on the projection image according to the collection result collected by the image sensor and the collection result collected by the light valve.
与图4所示的示例相比，投影设备1501包括多个光阀。单个光阀在单位时间A内接收N种颜色的光，那么单个光阀接收每一种颜色的时间为A/N。而使用三个光阀，分别接收3种颜色的光，单个光阀接收每一种颜色的时间为A，可以增大光阀接收光的时间，从而增大射出投影设备的光的强度。Compared with the example shown in FIG. 4, the projection device 1501 includes a plurality of light valves. A single light valve receives N colors of light in unit time A, so the time for a single light valve to receive each color is A/N. Three light valves are used to receive light of 3 colors, and the time for a single light valve to receive each color is A, which can increase the time for the light valve to receive light, thereby increasing the intensity of light emitted from the projection device.
需要说明的是，投影设备1501还可以包括位于第一偏振分光器1521与合光器1570之间的第一波片或第一偏振干涉滤光片。第一波片可以将第一偏振光转换为第二偏振光，还可以将第二偏振光转换为第一偏振光。第一偏振干涉滤光片可以将第一波长的第二偏振光转换为第一波长的第一偏振光，还可以将第一波长的第一偏振光转换为第一波长的第二偏振光。通过第一波片或第一偏振干涉滤光片，可以改变第一波长的光的偏振方向，进而提高合光器1570反射第一波长的光的反射率。图15所示的部件1515可以是第一波片。第一波片1515可以将来自第一偏振分光器1521的第一波长的第二偏振光转换为第一波长的第一偏振光，经第一波片1515转换后的光入射至合光器1570。It should be noted that the projection device 1501 may further include a first wave plate or a first polarization interference filter located between the first polarization beam splitter 1521 and the light combiner 1570. The first wave plate can convert the first polarized light into the second polarized light, and can also convert the second polarized light into the first polarized light. The first polarization interference filter can convert the second polarization of the first wavelength into the first polarization of the first wavelength, and can also convert the first polarization of the first wavelength into the second polarization of the first wavelength. Through the first wave plate or the first polarization interference filter, the polarization direction of the light of the first wavelength can be changed, thereby increasing the reflectivity of the light combiner 1570 to reflect the light of the first wavelength. The component 1515 shown in FIG. 15 may be a first wave plate. The first wave plate 1515 can convert the second polarized light of the first wavelength from the first polarization beam splitter 1521 into the first polarized light of the first wavelength, and the light converted by the first wave plate 1515 is incident on the light combiner 1570 .
类似地，投影设备1501还可以包括位于第二偏振分光器1522与合光器1570之间的第二波片或第二偏振干涉滤光片。第二波片可以将第一偏振光转换为第二偏振光，还可以将第二偏振光转换为第一偏振光。第二偏振干涉滤光片可以将第二波长的第二偏振光转换为第二波长的第一偏振光，还可以将第二波长的第一偏振光转换为第二波长的第二偏振光。通过第二波片或第二偏振干涉滤光片，可以改变第二波长的光的偏振方向，进而提高合光器1570反射第二波长的光的反射率。图15所示的部件1516可以是第二波片。第二波片1516可以将来自第二偏振分光器1522的第二波长的第二偏振光转换为第二波长的第一偏振光，经第二波片1516转换后的光入射至合光器1570。Similarly, the projection device 1501 may further include a second wave plate or a second polarization interference filter located between the second polarization beam splitter 1522 and the light combiner 1570. The second wave plate can convert the first polarized light into the second polarized light, and can also convert the second polarized light into the first polarized light. The second polarization interference filter can convert the second polarization of the second wavelength into the first polarization of the second wavelength, and can also convert the first polarization of the second wavelength into the second polarization of the second wavelength. Through the second wave plate or the second polarization interference filter, the polarization direction of the light of the second wavelength can be changed, and the reflectance of the light of the second wavelength of the light combiner 1570 can be improved. The component 1516 shown in FIG. 15 may be a second wave plate. The second wave plate 1516 can convert the second polarized light of the second wavelength from the second polarization beam splitter 1522 into the first polarized light of the second wavelength, and the light converted by the second wave plate 1516 is incident on the light combiner 1570 .
基于图15所示的投影设备1501，下面结合图16阐述本申请提供的另一种投影设备的结构性示意图。如图16所示，来自第一光阀1631的第一波长的光、来自第二光阀1632的第二波长的光、来自第三光阀1633的第三波长的光均可以入射至合光器1670。Based on the projection device 1501 shown in FIG. 15, a schematic structural diagram of another projection device provided in the present application will be described below in conjunction with FIG. 16. As shown in FIG. 16, the light of the first wavelength from the first light valve 1631, the light of the second wavelength from the second light valve 1632, and the light of the third wavelength from the third light valve 1633 can all be incident on the combined light.器1670.
与图15所示的合光器1570相比，图16所示的合光器1670可以包括垂直且相交的第三反射层1671以及第四反射层1672。第四反射层1672可以将第三反射层1671划分为第五部分以及第六部分，第五部分的面积与第六部分的面积可以相同或大体相同。第三反射层1671可以将第四反射层1672划分为第七部分以及第八部分，第七部分的面积与第八部分的面积可以相同或大体相同。第三反射层1671可以反射第三波长的光，透射波长不是第三波长的光(如第一波长的光、第二波长的光、红外光)。例如，第三波长的光可以是绿光，第三反射层1671可以反射绿光，并透射红光、蓝光、红外光。因此，来自第三光阀1633的第三波长的光可以在第三反射层1671上发生反射。第四反射层1672可以反射 第二波长的光，透射波长不是第二波长的光(如第一波长的光、第三波长的光、红外光)。例如第二波长的光可以是蓝光，第四反射层1672可以反射蓝光，并透射红光、红外光、绿光。因此，来自第二光阀1632的第二波长的光可以在第四反射层1672上发生反射。最终，来自第一光阀1631、第二光阀1632、第三光阀1633的光可以沿该目标方向射出该合光器1670。红外光透射合光器中的第三反射层1671、第四反射层1672，基本不会影响合光器1670的加工难度，有利于维持投影设备的生产难度、生产效率、生产成本。Compared with the light combiner 1570 shown in FIG. 15, the light combiner 1670 shown in FIG. 16 may include a third reflective layer 1671 and a fourth reflective layer 1672 that are perpendicular and intersecting. The fourth reflective layer 1672 may divide the third reflective layer 1671 into a fifth part and a sixth part, and the area of the fifth part and the area of the sixth part may be the same or substantially the same. The third reflective layer 1671 may divide the fourth reflective layer 1672 into a seventh part and an eighth part, and the area of the seventh part and the area of the eighth part may be the same or substantially the same. The third reflective layer 1671 can reflect light with a third wavelength and transmit light with a wavelength other than the third wavelength (such as light with a first wavelength, light with a second wavelength, infrared light). For example, the light of the third wavelength may be green light, and the third reflective layer 1671 may reflect green light and transmit red light, blue light, and infrared light. Therefore, the light of the third wavelength from the third light valve 1633 may be reflected on the third reflective layer 1671. The fourth reflective layer 1672 can reflect light of the second wavelength and transmit light of a wavelength other than the second wavelength (e.g., light of the first wavelength, light of the third wavelength, infrared light). For example, the light of the second wavelength may be blue light, and the fourth reflective layer 1672 may reflect blue light and transmit red light, infrared light, and green light. Therefore, the light of the second wavelength from the second light valve 1632 may be reflected on the fourth reflective layer 1672. Finally, the light from the first light valve 1631, the second light valve 1632, and the third light valve 1633 can exit the light combiner 1670 along the target direction. The third reflective layer 1671 and the fourth reflective layer 1672 in the infrared light transmission light combiner basically do not affect the processing difficulty of the light combiner 1670, which is beneficial to maintain the production difficulty, production efficiency, and production cost of the projection equipment.
射入投影设备1601的红外光沿该目标方向的相反方向入射至合光器1670。由于第三反射层1671、第四反射层1672均可以透射红外光。根据光的可逆性可知，沿该目标方向的相反方向入射至合光器1670的红外光，可以射入第一偏振分光器1621的第二侧B。The infrared light incident on the projection device 1601 is incident on the light combiner 1670 in a direction opposite to the target direction. Since the third reflective layer 1671 and the fourth reflective layer 1672 can transmit infrared light. According to the reversibility of light, the infrared light incident on the light combiner 1670 in a direction opposite to the target direction can be incident on the second side B of the first polarization beam splitter 1621.
第一偏振分光器1621包括红外反射层，因此第一偏振分光器1621可以反射红外光。因此，经第一偏振分光器1621反射的红外光可以射入图像传感器1640。图像传感器1640可以采集来自第一偏振分光器1621的红外光。由于投影区域1602与图像传感器1640满足物像共轭关系，第一光阀1631、第二光阀1632、第三光阀1633均与投影区域1602满足物像共轭关系，因此，图像处理器(图16未示出)可以根据图像传感器采集到的采集结果以及光阀采集到的采集结果，确定用户在投影图像上的指示位置。The first polarization beam splitter 1621 includes an infrared reflective layer, so the first polarization beam splitter 1621 can reflect infrared light. Therefore, the infrared light reflected by the first polarization beam splitter 1621 can be incident on the image sensor 1640. The image sensor 1640 can collect infrared light from the first polarization beam splitter 1621. Since the projection area 1602 and the image sensor 1640 meet the object-image conjugate relationship, the first light valve 1631, the second light valve 1632, and the third light valve 1633 all meet the object-image conjugate relationship with the projection area 1602. Therefore, the image processor ( (Not shown in FIG. 16) The user's indicated position on the projection image can be determined according to the collection result collected by the image sensor and the collection result collected by the light valve.
对于图16所示的投影设备1601，通过将图15中的合光器1570替换为合光器1670，可以改变投影设备中光学器件的排布方式。另外，在图16所示的投影设备1601中，射入投影设备1601的红外光透射合光器1670中的第四反射层1672以及第三反射层1671。在图15所示的投影设备1501中，射入投影设备1501的红外光可以在合光器1570中的第一反射层1571发生反射。由于合光器中反射层的反射率相对高于透射率，因此，投影设备1501中的图像传感器1560可以采集到光强更高的红外光。For the projection device 1601 shown in FIG. 16, by replacing the light combiner 1570 in FIG. 15 with a light combiner 1670, the arrangement of optical devices in the projection device can be changed. In addition, in the projection device 1601 shown in FIG. 16, the infrared light incident on the projection device 1601 transmits the fourth reflective layer 1672 and the third reflective layer 1671 in the light combiner 1670. In the projection device 1501 shown in FIG. 15, the infrared light incident on the projection device 1501 may be reflected by the first reflective layer 1571 in the light combiner 1570. Since the reflectance of the reflective layer in the light combiner is relatively higher than the transmittance, the image sensor 1560 in the projection device 1501 can collect infrared light with higher light intensity.
在图15所示的实施例中，第一偏振分光器1521包括红外反射层，可以反射第一偏振光、红外光，透射除第一偏振光、红外光以外的其他光。图17是本申请提供的另一种投影设备的结构性示意图。与图15所示的投影设备1501相比，图17所示的第一偏振分光器1721可以反射第一偏振光、透射第二偏振光，而可以不包括红外反射层。因此，与图15所示的投影设备1501相比，图17所示的投影设备1701还包括设置在第一偏振分光器1721与成像透镜1750之间的第一红外偏振转换器1760。如图17所示，第一红外偏振转换器1760可以设置在合光器1770与成像透镜1750之间。来自成像透镜1750的红外光可以穿过第一红外偏振转换器1760，并被第一红外偏振转换器1760转换为第一偏振红外光，第一偏振红外光属于第一偏振光。第一红外偏振转换器1760射出的第一偏振红外光可以经合光器1770的第一反射面1771反射至第一偏振分光器1721。来自合光器1770的第一偏振红外光可以经第一偏振分光器1721反射至图像传感器1740。In the embodiment shown in FIG. 15, the first polarization beam splitter 1521 includes an infrared reflective layer, which can reflect the first polarized light and infrared light, and transmit other light except the first polarized light and infrared light. Fig. 17 is a schematic structural diagram of another projection device provided by the present application. Compared with the projection device 1501 shown in FIG. 15, the first polarization beam splitter 1721 shown in FIG. 17 can reflect the first polarized light and transmit the second polarized light, but may not include an infrared reflective layer. Therefore, compared with the projection device 1501 shown in FIG. 15, the projection device 1701 shown in FIG. 17 further includes a first infrared polarization converter 1760 provided between the first polarization beam splitter 1721 and the imaging lens 1750. As shown in FIG. 17, the first infrared polarization converter 1760 may be disposed between the light combiner 1770 and the imaging lens 1750. The infrared light from the imaging lens 1750 may pass through the first infrared polarization converter 1760 and be converted into the first polarization infrared light by the first infrared polarization converter 1760, and the first polarization infrared light belongs to the first polarization light. The first polarized infrared light emitted by the first infrared polarization converter 1760 may be reflected to the first polarization beam splitter 1721 via the first reflection surface 1771 of the light combiner 1770. The first polarized infrared light from the light combiner 1770 may be reflected to the image sensor 1740 through the first polarization beam splitter 1721.
对于图17所示的投影设备1701，通过在第一偏振分光器1721与成像透镜1750之间设置第一红外偏振转换器1760，使得到达第一偏振分光器1721的红外光基本属于第一偏振光，从而来自成像透镜1750的大部分红外光可以经第一偏振分光器1721反射至图像传感器1740。因此，红外光到达图像传感器1740的光强可以较高。For the projection device 1701 shown in FIG. 17, the first infrared polarization converter 1760 is arranged between the first polarization beam splitter 1721 and the imaging lens 1750, so that the infrared light reaching the first polarization beam splitter 1721 basically belongs to the first polarization light. Therefore, most of the infrared light from the imaging lens 1750 can be reflected to the image sensor 1740 through the first polarization beam splitter 1721. Therefore, the intensity of infrared light reaching the image sensor 1740 can be higher.
需要说明的是，投影设备1701还可以包括位于第一偏振分光器1721与合光器1770之间的第一偏振干涉滤光片1715。第一偏振干涉滤光片1715可以将第一波长的第二偏振光转换为第一波长的第一偏振光，还可以将第一波长的第一偏振光转换为第一波长的第二 偏振光。通过第一偏振干涉滤光片1715，可以改变第一波长的光的偏振方向，进而提高合光器1770反射第一波长的光的反射率。另外，第一偏振干涉滤光片1715可以仅改变第一波长的光的偏振方向，不改变其他光(如红外光)的偏振方向，有利于保证合光器1770射出的红外光的强度。It should be noted that the projection device 1701 may further include a first polarization interference filter 1715 located between the first polarization beam splitter 1721 and the light combiner 1770. The first polarization interference filter 1715 can convert the second polarization of the first wavelength into the first polarization of the first wavelength, and can also convert the first polarization of the first wavelength into the second polarization of the first wavelength . Through the first polarization interference filter 1715, the polarization direction of the light of the first wavelength can be changed, thereby improving the reflectivity of the light combiner 1770 to reflect the light of the first wavelength. In addition, the first polarization interference filter 1715 can only change the polarization direction of the light of the first wavelength without changing the polarization direction of other light (such as infrared light), which is beneficial to ensure the intensity of the infrared light emitted by the light combiner 1770.
类似地，投影设备1701还可以包括位于第二偏振分光器1722与合光器1770之间的第二波片或第二偏振干涉滤光片。第二波片可以将第一偏振光转换为第二偏振光，还可以将第二偏振光转换为第一偏振光。第二偏振干涉滤光片可以将第二波长的第二偏振光转换为第二波长的第一偏振光，还可以将第二波长的第一偏振光转换为第二波长的第二偏振光。通过第二波片或第二偏振干涉滤光片，可以改变第二波长的光的偏振方向，进而提高合光器1770反射第二波长的光的反射率。图17所示的部件1716可以是第二波片。第二波片1716可以将来自第二偏振分光器1722的第二波长的第二偏振光转换为第二波长的第一偏振光，经第二波片1716转换后的光入射至合光器1770。Similarly, the projection device 1701 may further include a second wave plate or a second polarization interference filter located between the second polarization beam splitter 1722 and the light combiner 1770. The second wave plate can convert the first polarized light into the second polarized light, and can also convert the second polarized light into the first polarized light. The second polarization interference filter can convert the second polarization of the second wavelength into the first polarization of the second wavelength, and can also convert the first polarization of the second wavelength into the second polarization of the second wavelength. Through the second wave plate or the second polarization interference filter, the polarization direction of the light of the second wavelength can be changed, thereby increasing the reflectivity of the light combiner 1770 to reflect the light of the second wavelength. The component 1716 shown in FIG. 17 may be a second wave plate. The second wave plate 1716 can convert the second polarized light of the second wavelength from the second polarization beam splitter 1722 into the first polarized light of the second wavelength, and the light converted by the second wave plate 1716 is incident on the light combiner 1770 .
在图16所示的实施例中，第一偏振分光器1621包括红外反射层，可以反射第一偏振光、红外光，透射除第一偏振光、红外光以外的其他光。图18是本申请提供的另一种投影设备的结构性示意图。与图16所示的投影设备1601相比，图18所示的第一偏振分光器1821可以反射第一偏振光、透射第二偏振光，而可以不包括红外反射层。因此，与图16所示的投影设备1601相比，图18所示的投影设备1801还包括设置在合光器1870与成像透镜1850之间的第二偏振转换器1861，以及设置在合光器1870与第一偏振分光器1821之间的第一波片1862。In the embodiment shown in FIG. 16, the first polarization beam splitter 1621 includes an infrared reflective layer, which can reflect the first polarized light and infrared light, and transmit other light except the first polarized light and infrared light. FIG. 18 is a schematic structural diagram of another projection device provided by the present application. Compared with the projection device 1601 shown in FIG. 16, the first polarization beam splitter 1821 shown in FIG. 18 can reflect the first polarized light and transmit the second polarized light, but may not include an infrared reflective layer. Therefore, compared with the projection device 1601 shown in FIG. 16, the projection device 1801 shown in FIG. 18 further includes a second polarization converter 1861 disposed between the light combiner 1870 and the imaging lens 1850, and a second polarization converter 1861 disposed between the light combiner 1870 and the imaging lens 1850. The first wave plate 1862 between 1870 and the first polarization beam splitter 1821.
该第二偏振转换器1861可以将该第二偏振转换器1861的入射光转换为第二偏振光。例如，穿过第二偏振转换器1861的光包括第一偏振光以及第二偏振光，第二偏振转换器1861可以将第一偏振光转换为第二偏振光，并透过入射的第二偏振光。第二偏振转换器1861可以将来自成像透镜1850的红外光转变为第二偏振红外光，该第二偏振红外光属于第二偏振光。第二偏振转换器1861可以改变红外光的偏振方向，有利于保证合光器1770射出的红外光的强度。The second polarization converter 1861 can convert the incident light of the second polarization converter 1861 into a second polarized light. For example, the light passing through the second polarization converter 1861 includes the first polarization and the second polarization. The second polarization converter 1861 can convert the first polarization into the second polarization and transmit the incident second polarization. Light. The second polarization converter 1861 can convert the infrared light from the imaging lens 1850 into the second polarized infrared light, and the second polarized infrared light belongs to the second polarized light. The second polarization converter 1861 can change the polarization direction of the infrared light, which is beneficial to ensure the intensity of the infrared light emitted by the light combiner 1770.
第一波片1862可以将第一偏振光转换为第二偏振光，还可以将第二偏振光转换为第一偏振光。第一波片1862可以将合光器1870射出的第二偏振红外光转换为第一偏振红外光，该第一偏振红外光属于第一偏振光。该第一偏振红外光可以经第一偏振分光器1821反射至图像传感器1840。第一波片1862还可以改变来自第一偏振分光器1821的第一波长的第二偏振光的偏振方向，有利于保证合光器1770射出的第一波长的光的强度。The first wave plate 1862 can convert the first polarized light into the second polarized light, and can also convert the second polarized light into the first polarized light. The first wave plate 1862 can convert the second polarized infrared light emitted by the light combiner 1870 into the first polarized infrared light, and the first polarized infrared light belongs to the first polarized light. The first polarized infrared light may be reflected to the image sensor 1840 through the first polarization beam splitter 1821. The first wave plate 1862 can also change the polarization direction of the second polarized light of the first wavelength from the first polarization beam splitter 1821, which is beneficial to ensure the intensity of the light of the first wavelength emitted by the light combiner 1770.
需要说明的是，由于射入投影设备的红外光可以经第二偏振转换器1861、第一波片1862被转换为第一偏振红外光，且第一波片1862射出的光可以入射至第一偏振分光器，因此第二偏振转换器1861、第一波片1862的组合可以被视为第一红外偏振转换器。其中，该第一红外偏振转换器可以用于将射入投影设备的红外光转换为第一偏振红外光，该第一偏振红外光属于该第一偏振光，该第一红外偏振转换器射出的红外光可以入射至第一偏振分光器。It should be noted that the infrared light incident on the projection device can be converted into the first polarized infrared light by the second polarization converter 1861 and the first wave plate 1862, and the light emitted by the first wave plate 1862 can be incident on the first wave plate 1862. A polarization beam splitter, so the combination of the second polarization converter 1861 and the first wave plate 1862 can be regarded as the first infrared polarization converter. Wherein, the first infrared polarization converter can be used to convert infrared light incident on the projection device into first polarization infrared light, the first polarization infrared light belongs to the first polarization light, and the first infrared polarization converter emits Infrared light may be incident on the first polarization beam splitter.
对于图18所示的投影设备1801，通过在第一偏振分光器1821与成像透镜1850之间设置第二偏振转换器1861以及第一波片1862，使得到达第一偏振分光器1821的红外光基本属于第一偏振光，从而来自成像透镜1850的大部分红外光可以经第一偏振分光器 1821反射至图像传感器1840。因此，红外光到达图像传感器1840的光强可以较高。For the projection device 1801 shown in FIG. 18, the second polarization converter 1861 and the first wave plate 1862 are arranged between the first polarization beam splitter 1821 and the imaging lens 1850, so that the infrared light reaching the first polarization beam splitter 1821 is basically It belongs to the first polarized light, so that most of the infrared light from the imaging lens 1850 can be reflected to the image sensor 1840 through the first polarization beam splitter 1821. Therefore, the intensity of infrared light reaching the image sensor 1840 can be higher.
下面结合图15所示的示例，并结合图19，阐述本申请实施例提供的一种投影设备。图19所示的投影设备1901可以是如图1至图3中的投影设备110。投影设备1901发出的光可以投影在投影区域1902，从而在该投影区域1902上可以显示有图像。投影区域1902可以是如图1至图3中的投影区域120。可以理解的是，图19所示的实施例仅是为了帮助本领域技术人员更好地理解本申请的技术方案，而并非是对本申请技术方案的限制。在受益于前述描述和相关附图中呈现的指导启示下，本领域技术人员将会想到本申请的许多改进和其他实施例。因此，应理解，本申请不限于所公开的特定实施例。The following describes a projection device provided by an embodiment of the present application with reference to the example shown in FIG. 15 and FIG. 19. The projection device 1901 shown in FIG. 19 may be the projection device 110 shown in FIGS. 1 to 3. The light emitted by the projection device 1901 can be projected on the projection area 1902, so that an image can be displayed on the projection area 1902. The projection area 1902 may be the projection area 120 as shown in FIGS. 1 to 3. It can be understood that the embodiment shown in FIG. 19 is only for helping those skilled in the art to better understand the technical solution of the present application, and is not a limitation to the technical solution of the present application. Benefiting from the guidance presented in the foregoing description and related drawings, those skilled in the art will think of many improvements and other embodiments of the present application. Therefore, it should be understood that the present application is not limited to the specific embodiments disclosed.
投影设备1901可以包括第一光处理器1910、第一偏振分光器1921、第二偏振分光器1922、第三偏振分光器1923、第一光阀1931、第二光阀1932、第三光阀1933、第一波片1915、第二波片1916、合光器1970、成像透镜1950、图像传感器1940。The projection device 1901 may include a first light processor 1910, a first polarization beam splitter 1921, a second polarization beam splitter 1922, a third polarization beam splitter 1923, a first light valve 1931, a second light valve 1932, and a third light valve 1933. , The first wave plate 1915, the second wave plate 1916, the light combiner 1970, the imaging lens 1950, and the image sensor 1940.
第一光处理器1910可以包括光源1911、偏振转换器1918、分光镜1917、第一反射镜1912、第二反射镜1913、二向色镜1914。The first light processor 1910 may include a light source 1911, a polarization converter 1918, a beam splitter 1917, a first mirror 1912, a second mirror 1913, and a dichroic mirror 1914.
光源1911可以为投影设备1901供光。光源1911发出的光可以包括投影图像的图像信息。光源1911发出的光可以包括第一波长(625～740nm)的光、第二波长(440～475nm)的光、第三波长(492～577nm)的光。光源1911发出的光可以是自然光(波长为380～780nm)。自然光通常包括第一偏振光以及第二偏振光，第一偏振光的偏振方向垂直于第二偏振光的偏振方向。第一偏振光例如可以是S偏振光，第二偏振光例如可以是P偏振光。或者，第一偏振光例如可以是P偏振光，第二偏振光例如可以是S偏振光。The light source 1911 can provide light for the projection device 1901. The light emitted by the light source 1911 may include image information of the projected image. The light emitted by the light source 1911 may include light of a first wavelength (625-740 nm), light of a second wavelength (440-475 nm), and light of a third wavelength (492-577 nm). The light emitted by the light source 1911 may be natural light (wavelength is 380-780 nm). Natural light usually includes first polarized light and second polarized light, and the polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light. The first polarized light may be, for example, S polarized light, and the second polarized light may be, for example, P polarized light. Alternatively, the first polarized light may be, for example, P polarized light, and the second polarized light may be, for example, S polarized light.
偏振转换器1918可以将来自光源1911的光转换为该第一偏振光。偏振转换器1918射出的光可以包括第一波长的第一偏振光、第二波长的第一偏振光、第三波长的第一偏振光。如图19所示，偏振转换器1918射出的光可以混合有第一偏振红光、第一偏振蓝光、第一偏振绿光，第一偏振红光、第一偏振蓝光、第一偏振绿光均属于第一偏振光。第一偏振红光的波长可以是第一波长。第一偏振蓝光的波长可以是第二波长。第一偏振绿光的波长可以是第三波长。The polarization converter 1918 can convert the light from the light source 1911 into the first polarized light. The light emitted by the polarization converter 1918 may include the first polarized light of the first wavelength, the first polarized light of the second wavelength, and the first polarized light of the third wavelength. As shown in FIG. 19, the light emitted by the polarization converter 1918 can be mixed with first polarized red light, first polarized blue light, and first polarized green light. The first polarized red light, the first polarized blue light, and the first polarized green light are all mixed. Belongs to the first polarized light. The wavelength of the first polarized red light may be the first wavelength. The wavelength of the first polarized blue light may be the second wavelength. The wavelength of the first polarized green light may be the third wavelength.
来自偏振转换器1918的光可以入射至分光镜1917。分光镜1917可以区分入射至分光镜1917的第一部分光的传播方向与第二部分光的传播方向。第一部分光可以包括第一波长的光，第二部分光可以包括波长为第二波长的光以及波长为第三波长的光。也就是说，分光镜1917可以将两种波长的光区分开来，使得这两种波长的光可以沿着不同的传播方向继续传播。第一部分光可以入射至第一反射镜1912。第二部分光可以入射至第二反射镜1913。如图19所示，分光镜1917射出的第一偏振红光可以入射至第一反射镜1912，分光镜1917射出的第一偏振蓝光、第一偏振绿光可以入射至第二反射镜1913。The light from the polarization converter 1918 can be incident on the beam splitter 1917. The beam splitter 1917 can distinguish the propagation direction of the first part of the light incident on the beam splitter 1917 and the propagation direction of the second part of the light. The first part of light may include light of a first wavelength, and the second part of light may include light of a second wavelength and light of a third wavelength. In other words, the beam splitter 1917 can distinguish two wavelengths of light, so that the two wavelengths of light can continue to propagate along different propagation directions. The first part of light may be incident on the first reflecting mirror 1912. The second part of the light may be incident on the second reflecting mirror 1913. As shown in FIG. 19, the first polarized red light emitted by the beam splitter 1917 can be incident on the first mirror 1912, and the first polarized blue light and the first polarized green light emitted by the beam splitter 1917 can be incident on the second mirror 1913.
第一反射镜1912可以反射来自分光镜1917的第一部分光。经第一反射镜1912反射的光可以入射至第一偏振分光器1921。如图19所示，第一反射镜1912可以反射来自分光镜1917的第一偏振红光；经第一反射镜1912反射的第一偏振红光可以入射至第一偏振分光器1921。The first reflecting mirror 1912 can reflect the first part of the light from the dichroic mirror 1917. The light reflected by the first mirror 1912 may be incident to the first polarization beam splitter 1921. As shown in FIG. 19, the first reflecting mirror 1912 can reflect the first polarized red light from the beam splitter 1917; the first polarized red light reflected by the first reflecting mirror 1912 can be incident on the first polarizing beam splitter 1921.
第二反射镜1913可以反射来自分光镜1917的第二部分光。经过第二反射镜1913反射的光可以入射至二向色镜1914。如图19所示，第二反射镜1913可以反射来自分光镜1917的第一偏振蓝光、第一偏振绿光；经第二反射镜1913反射的第一偏振蓝光、第一偏 振绿光可以入射至二向色镜1914。The second reflecting mirror 1913 can reflect the second part of the light from the dichroic mirror 1917. The light reflected by the second reflecting mirror 1913 may be incident on the dichroic mirror 1914. As shown in FIG. 19, the second reflecting mirror 1913 can reflect the first polarized blue light and the first polarized green light from the beam splitter 1917; the first polarized blue light and the first polarized green light reflected by the second reflecting mirror 1913 can be incident on Dichroic mirror 1914.
二向色镜1914可以透过处于透射波长范围内的光，并反射处于反射波长范围内的光。该透射波长范围可以包括该第二波长，该反射波长范围可以包括该第三波长。经二向色镜1914透射的光可以入射至第二偏振分光器1922。经二向色镜1914反射的光可以入射至第三偏振分光器1923。如图19所示，二向色镜1914可以透射来自第二反射镜1913的第一偏振蓝光，反射来自第二反射镜1913的第一偏振绿光。二向色镜1914射出的第一偏振蓝光可以入射至第二偏振分光器1922。二向色镜1914射出的第一偏振绿光可以入射至第三偏振分光器1923。The dichroic mirror 1914 can transmit light in the transmission wavelength range and reflect light in the reflection wavelength range. The transmission wavelength range may include the second wavelength, and the reflection wavelength range may include the third wavelength. The light transmitted through the dichroic mirror 1914 may be incident to the second polarization beam splitter 1922. The light reflected by the dichroic mirror 1914 may be incident to the third polarization beam splitter 1923. As shown in FIG. 19, the dichroic mirror 1914 can transmit the first polarized blue light from the second mirror 1913 and reflect the first polarized green light from the second mirror 1913. The first polarized blue light emitted by the dichroic mirror 1914 may be incident on the second polarizing beam splitter 1922. The first polarized green light emitted by the dichroic mirror 1914 may be incident on the third polarization beam splitter 1923.
上文已经通过图15至图18阐述了第一波长的光射入第一偏振分光器并射出投影设备的实施例，第二波长的光射入第二偏振分光器并射出投影设备的实施例，第三波长的光射入第三偏振分光器并射出投影设备的实施例，以及，射入投影设备的红外光入射至图像传感器的实施例，在此就不再详细赘述。The embodiment in which the light of the first wavelength enters the first polarization beam splitter and exits the projection device has been described above through FIGS. 15 to 18, and the embodiment in which the light of the second wavelength enters the second polarization beam splitter and exits the projection device. The embodiment in which the light of the third wavelength enters the third polarization beam splitter and exits the projection device, and the embodiment in which the infrared light entered into the projection device is incident on the image sensor will not be described in detail here.
图20是本申请提供的一种投影设备的结构性示意图。投影设备2001可以是如图1至图3中的投影设备110。投影设备2001发出的光可以投影在投影区域2002，从而在该投影区域2002上可以显示有图像。投影区域2002可以是如图1至图3中的投影区域120。FIG. 20 is a schematic structural diagram of a projection device provided by the present application. The projection device 2001 may be the projection device 110 as shown in FIGS. 1 to 3. The light emitted by the projection device 2001 can be projected on the projection area 2002, so that an image can be displayed on the projection area 2002. The projection area 2002 may be the projection area 120 as shown in FIGS. 1 to 3.
投影设备2001可以包括第一光处理器2010、第一偏振干涉滤光片2071、第二偏振干涉滤光片2072、第三偏振干涉滤光片2073、第一偏振分光器2021、第二偏振分光器2022、第三偏振分光器2023、第四偏振分光器2024、第一光阀2031、第二光阀2032、第三光阀2033、第一波片2061、第二波片2062、成像透镜2050、图像传感器2040。The projection device 2001 may include a first optical processor 2010, a first polarization interference filter 2071, a second polarization interference filter 2072, a third polarization interference filter 2073, a first polarization beam splitter 2021, and a second polarization beam splitter. 2022, third polarization beam splitter 2023, fourth polarization beam splitter 2024, first light valve 2031, second light valve 2032, third light valve 2033, first wave plate 2061, second wave plate 2062, imaging lens 2050 , Image sensor 2040.
第一光处理器2010可以射出包括投影图像的图像信息的第一偏振光。第一偏振光例如可以是P偏振光或S偏振光。第一偏振光可以包括第一波长的光、第二波长的光、以及第三波长的光。上文已通过图4所示的实施例对光处理器进行了阐述，在此就不必再赘述。The first light processor 2010 may emit the first polarized light including the image information of the projected image. The first polarized light may be P-polarized light or S-polarized light, for example. The first polarized light may include light of a first wavelength, light of a second wavelength, and light of a third wavelength. The optical processor has been described above through the embodiment shown in FIG. 4, and it is not necessary to repeat it here.
第一偏振干涉滤光片2071可以转换第一波长的光的偏振方向，例如可以将第一波长的第一偏振光转换为第一波长的第二偏振光。该第二偏振光的偏振方向垂直于该第一偏振光的偏振方向。第一偏振干涉滤光片2071可以不改变不是第一波长的光的偏振方向。例如，第一偏振干涉滤光片2071不改变第二波长的光以及第三波长的光的偏振方向。来自第一光处理器2010的光可以穿过第一偏振干涉滤光片2071到达第二偏振分光器2022。射出第一偏振干涉滤光片2071的光可以包括第一波长的第二偏振光、第二波长的第一偏振光、第三波长的第一偏振光。The first polarization interference filter 2071 can convert the polarization direction of the light of the first wavelength, for example, can convert the first polarized light of the first wavelength into the second polarized light of the first wavelength. The polarization direction of the second polarized light is perpendicular to the polarization direction of the first polarized light. The first polarization interference filter 2071 may not change the polarization direction of light having a wavelength other than the first wavelength. For example, the first polarization interference filter 2071 does not change the polarization directions of the light of the second wavelength and the light of the third wavelength. The light from the first light processor 2010 may pass through the first polarization interference filter 2071 to reach the second polarization beam splitter 2022. The light emitted from the first polarization interference filter 2071 may include the second polarized light of the first wavelength, the first polarized light of the second wavelength, and the first polarized light of the third wavelength.
第二偏振分光器2022可以反射第一偏振光，并透射第二偏振光。来自第一偏振干涉滤光片2071的该第一波长的第二偏振光可以透射第二偏振分光器2022，入射至第一波片2061。来自第一偏振干涉滤光片2071的该第二波长的第一偏振光以及该第三波长的第一偏振光可以经第二偏振分光器2022反射至第二偏振干涉滤光片2072。The second polarization beam splitter 2022 may reflect the first polarized light and transmit the second polarized light. The second polarized light of the first wavelength from the first polarization interference filter 2071 can pass through the second polarization beam splitter 2022 and enter the first wave plate 2061. The first polarized light of the second wavelength and the first polarized light of the third wavelength from the first polarization interference filter 2071 may be reflected to the second polarization interference filter 2072 by the second polarization beam splitter 2022.
第一波片2061可以将第一偏振光转换为第二偏振光，还可以将第二偏振光转换为第一偏振光。因此，第一波片2061可以将来自第二偏振分光器2022的第一波长的第二偏振光转换为第一波长的第一偏振光。射出该第一波片2061的第一波长的第一偏振光可以入射至第一偏振分光器2021的第一侧A。The first wave plate 2061 can convert the first polarized light into the second polarized light, and can also convert the second polarized light into the first polarized light. Therefore, the first wave plate 2061 can convert the second polarized light of the first wavelength from the second polarization beam splitter 2022 into the first polarized light of the first wavelength. The first polarized light of the first wavelength emitted from the first wave plate 2061 may be incident on the first side A of the first polarization beam splitter 2021.
第一偏振分光器2021可以反射第一偏振光，并透射第二偏振光。来自第一波片2061的该第一波长的第一偏振光可以经第一偏振分光器2021反射，并垂直射入第一光阀2031。The first polarization beam splitter 2021 may reflect the first polarized light and transmit the second polarized light. The first polarized light of the first wavelength from the first wave plate 2061 may be reflected by the first polarization beam splitter 2021 and enter the first light valve 2031 vertically.
第一光阀2031可以采集入射的第一波长的第一偏振光，将入射的第一偏振光转变为第二偏振光，并射出该第二偏振光。因此，第一光阀2031可以将来自第一偏振分光器2021的第一波长的第一偏振光转换为第一波长的第二偏振光，并垂直射出该第一波长的第二偏振光。第一光阀2031射出的第一波长的第二偏振光可以从第一偏振分光器2021的第一侧A射入，并从第一偏振分光器2021的第二侧B射出。来自第一偏振分光器2021的第一波长的第二偏振光可以入射至第二波片2062。The first light valve 2031 can collect the incident first polarized light of the first wavelength, convert the incident first polarized light into a second polarized light, and emit the second polarized light. Therefore, the first light valve 2031 can convert the first polarized light of the first wavelength from the first polarization beam splitter 2021 into the second polarized light of the first wavelength, and vertically emit the second polarized light of the first wavelength. The second polarized light of the first wavelength emitted by the first light valve 2031 may enter from the first side A of the first polarization beam splitter 2021 and exit from the second side B of the first polarization beam splitter 2021. The second polarized light of the first wavelength from the first polarizing beam splitter 2021 may be incident on the second wave plate 2062.
第二波片2062可以将第一偏振光转换为第二偏振光，还可以将第二偏振光转换为第一偏振光。因此，第二波片2062可以将来自第一偏振分光器2021的第一波长的第二偏振光转换为第一波长的第一偏振光。射出第二波片2062的第一波长的第一偏振光可以入射至第四偏振分光器2024。The second wave plate 2062 can convert the first polarized light into the second polarized light, and can also convert the second polarized light into the first polarized light. Therefore, the second wave plate 2062 can convert the second polarized light of the first wavelength from the first polarization beam splitter 2021 into the first polarized light of the first wavelength. The first polarized light of the first wavelength emitted from the second wave plate 2062 may be incident on the fourth polarization beam splitter 2024.
第二偏振干涉滤光片2072可以转换第二波长的光的偏振方向，例如可以将第二波长的第一偏振光转换为第二波长的第二偏振光。第二偏振干涉滤光片2072可以不改变不是第二波长的光的偏振方向。例如，第二偏振干涉滤光片2072不改变第三波长的光的偏振方向。来自第二偏振分光器2022的光可以穿过第二偏振干涉滤光片2072，射入第三偏振分光器2023。第二偏振干涉滤光片2072射出光包括第二波长的第二偏振光、第三波长的第一偏振光。The second polarization interference filter 2072 can convert the polarization direction of the light of the second wavelength, for example, can convert the first polarized light of the second wavelength into the second polarized light of the second wavelength. The second polarization interference filter 2072 may not change the polarization direction of light having a wavelength other than the second wavelength. For example, the second polarization interference filter 2072 does not change the polarization direction of the light of the third wavelength. The light from the second polarization beam splitter 2022 may pass through the second polarization interference filter 2072 and enter the third polarization beam splitter 2023. The light emitted by the second polarization interference filter 2072 includes the second polarization of the second wavelength and the first polarization of the third wavelength.
第三偏振分光器2023可以反射第一偏振光，并透射第二偏振光。来自第二偏振干涉滤光片2072的第二波长的第二偏振光可以透射第二偏振分光器2022，并垂直射入第二光阀2032。来自第二偏振干涉滤光片2072的第三波长的第一偏振光可以经第三偏振分光器2023反射，并垂直射入第三光阀2033。The third polarization beam splitter 2023 may reflect the first polarized light and transmit the second polarized light. The second polarization light of the second wavelength from the second polarization interference filter 2072 can transmit through the second polarization beam splitter 2022 and enter the second light valve 2032 perpendicularly. The first polarized light of the third wavelength from the second polarization interference filter 2072 may be reflected by the third polarization beam splitter 2023 and enter the third light valve 2033 perpendicularly.
第二光阀2032可以采集来自第二偏振分光器2022的第二波长的第二偏振光，将来自第二偏振分光器2022的第二波长的第二偏振光转换为第二波长的第一偏振光，并射出该第二波长的第一偏振光。第二光阀2032垂直射出的第二波长的第一偏振光可以经第二偏振分光器2022反射至第三偏振干涉滤光片2073。The second light valve 2032 can collect the second polarization of the second wavelength from the second polarization beam splitter 2022, and convert the second polarization of the second wavelength from the second polarization beam splitter 2022 into the first polarization of the second wavelength. Light, and emits the first polarized light of the second wavelength. The first polarized light of the second wavelength emitted perpendicularly from the second light valve 2032 may be reflected by the second polarization beam splitter 2022 to the third polarization interference filter 2073.
第三光阀2033可以采集来自第三偏振分光器2023的第三波长的第一偏振光，将来自第三偏振分光器2023的第三波长的第一偏振光转换为第三波长的第二偏振光，并射出该第三波长的第二偏振光。第三光阀2033垂直射出的第三波长的第二偏振光可以透射第三偏振分光器2023，并入射至第三偏振干涉滤光片2073。The third light valve 2033 can collect the first polarized light of the third wavelength from the third polarization beam splitter 2023, and convert the first polarized light of the third wavelength from the third polarization beam splitter 2023 into the second polarization of the third wavelength. Light and emit the second polarized light of the third wavelength. The second polarized light of the third wavelength emitted perpendicularly from the third light valve 2033 can pass through the third polarization beam splitter 2023 and be incident on the third polarization interference filter 2073.
其中，来自第二偏振干涉滤光片2072的第二波长的第二偏振光、第三波长的第三偏振光可以沿第一方向射入第三偏振分光器2023。该第一方向与该第三偏振分光器2023之间的夹角为C。该第二波长的第二偏振光可以沿该第一方向透射第三偏振分光器2023。该第三波长的第一偏振光可以经第三偏振分光器2023反射，并沿第二方向射出第三偏振分光器2023。由于出射角与入射角相等，因此该第二方向与第三偏振分光器2023之间的夹角为C。来自第二光阀2032的第二波长的第一偏振光沿第一方向的相反方向入射第三偏振分光器2023，并可以在第三偏振分光器2023上发生反射。由于第二方向与第三偏振分光器2023之间的夹角为C，并且出射角与入射角相等，因此第三偏振分光器2023反射的第二波长的第一偏振光可以沿该第二方向的相反方向射出第三偏振分光器2023。来自第三光阀2033的第三波长的第一偏振光可以沿第二方向的相反方向透射第三偏振分光器2023。最终，来自第二光阀2032的第二波长的光可以与来自第三光阀2033的第三波长的 光汇合。Among them, the second polarized light of the second wavelength and the third polarized light of the third wavelength from the second polarization interference filter 2072 may enter the third polarization beam splitter 2023 along the first direction. The angle between the first direction and the third polarization beam splitter 2023 is C. The second polarized light of the second wavelength may transmit through the third polarization beam splitter 2023 along the first direction. The first polarized light of the third wavelength may be reflected by the third polarization beam splitter 2023 and exit the third polarization beam splitter 2023 in the second direction. Since the exit angle is equal to the incident angle, the angle between the second direction and the third polarization beam splitter 2023 is C. The first polarized light of the second wavelength from the second light valve 2032 enters the third polarization beam splitter 2023 in the opposite direction of the first direction, and may be reflected on the third polarization beam splitter 2023. Since the angle between the second direction and the third polarizing beam splitter 2023 is C, and the exit angle is equal to the incident angle, the first polarized light of the second wavelength reflected by the third polarizing beam splitter 2023 can be along the second direction. The third polarizing beam splitter 2023 is emitted in the opposite direction of. The first polarized light of the third wavelength from the third light valve 2033 may transmit the third polarization beam splitter 2023 in the opposite direction of the second direction. Finally, the light of the second wavelength from the second light valve 2032 can be combined with the light of the third wavelength from the third light valve 2033.
第三偏振干涉滤光片2073可以转换第二波长的光的偏振方向，例如可以将第二波长的第一偏振光转换为第二波长的第二偏振光。第三偏振干涉滤光片2073可以不改变不是第二波长的光的偏振方向。例如，第三偏振干涉滤光片2073可以不改变第三波长的光的偏振方向。来自第三偏振分光器2023的光可以穿过第三偏振干涉滤光片2073，并入射至第四偏振分光器2024。第三偏振干涉滤光片2073射出光包括第二波长的第二偏振光、第三波长的第二偏振光。The third polarization interference filter 2073 can convert the polarization direction of the light of the second wavelength, for example, can convert the first polarized light of the second wavelength into the second polarized light of the second wavelength. The third polarization interference filter 2073 may not change the polarization direction of the light of the second wavelength. For example, the third polarization interference filter 2073 may not change the polarization direction of the light of the third wavelength. The light from the third polarization beam splitter 2023 may pass through the third polarization interference filter 2073 and be incident to the fourth polarization beam splitter 2024. The light emitted by the third polarization interference filter 2073 includes the second polarization of the second wavelength and the second polarization of the third wavelength.
第四偏振分光器2024可以将来自第一光阀2031、第二光阀2032、第三光阀2033的光汇合至成像透镜2050。其中，第四偏振分光器2024可以反射第一偏振光，并透射第二偏振光。来自第二波片2062的光与来自第三偏振干涉滤光片2073的光照射在第四偏振分光器2024的同一区域。来自第二波片2062的第一波长的第一偏振光可以经第四偏振分光器2024反射，并沿该第二方向的相反方向入射至成像透镜2050。来自第三偏振干涉滤光片2073的第二波长的第二偏振光、第三波长的第二偏振光可以沿该第二方向的相反方向透射第四偏振分光器2024，并入射至成像透镜2050。可以看出，第四偏振分光器2024射出的第一波长的光、第二波长的光、第三波长的光相互平行。The fourth polarization beam splitter 2024 can converge the light from the first light valve 2031, the second light valve 2032, and the third light valve 2033 to the imaging lens 2050. Wherein, the fourth polarization beam splitter 2024 can reflect the first polarized light and transmit the second polarized light. The light from the second wave plate 2062 and the light from the third polarization interference filter 2073 irradiate the same area of the fourth polarization beam splitter 2024. The first polarized light of the first wavelength from the second wave plate 2062 may be reflected by the fourth polarization beam splitter 2024 and incident on the imaging lens 2050 in the opposite direction of the second direction. The second polarized light of the second wavelength and the second polarized light of the third wavelength from the third polarization interference filter 2073 can be transmitted through the fourth polarization beam splitter 2024 in the opposite direction of the second direction, and be incident on the imaging lens 2050 . It can be seen that the light of the first wavelength, the light of the second wavelength, and the light of the third wavelength emitted by the fourth polarization beam splitter 2024 are parallel to each other.
成像透镜2050可以将投影图像成像在投影区域2002内。入射至成像透镜2050的光包括第一光阀2031、第二光阀2032以及第三光阀2033射出的光，因此第一光阀2031、第二光阀2032、第三光阀2033均与投影区域2002满足物像共轭关系。第一光阀2031、第二光阀2032、第三光阀2033中的一个或多个可以采集在投影区域2002内的投影图像。The imaging lens 2050 can image the projection image in the projection area 2002. The light incident on the imaging lens 2050 includes the light emitted by the first light valve 2031, the second light valve 2032, and the third light valve 2033. Therefore, the first light valve 2031, the second light valve 2032, and the third light valve 2033 are all related to the projection The area 2002 satisfies the object-image conjugate relationship. One or more of the first light valve 2031, the second light valve 2032, and the third light valve 2033 may collect a projection image in the projection area 2002.
可以通过射入投影设备2001的红外光，确定用户在投影图像上所指示的位置2003，进而实现用户与投影设备2001之间的交互。射入投影设备2001的红外光可以穿过成像透镜2050，并沿该第二方向入射至第四偏振分光器2024。可以看出，入射至第四偏振分光器2024的红外光与第四偏振分光器2024射出的第一波长的光、第二波长的光、第三波长的光相互平行。The position 2003 indicated by the user on the projected image can be determined by the infrared light incident on the projection device 2001, so as to realize the interaction between the user and the projection device 2001. The infrared light incident on the projection device 2001 may pass through the imaging lens 2050 and enter the fourth polarization beam splitter 2024 along the second direction. It can be seen that the infrared light incident to the fourth polarization beam splitter 2024 and the light of the first wavelength, the light of the second wavelength, and the light of the third wavelength emitted by the fourth polarization beam splitter 2024 are parallel to each other.
第四偏振分光器2024还包括红外反射层。因此，第四偏振分光器2024可以反射红外光。经第四偏振分光器2024反射的红外光可以穿过第二波片2062射入第一偏振分光器2021的第二侧B。The fourth polarization beam splitter 2024 also includes an infrared reflective layer. Therefore, the fourth polarization beam splitter 2024 can reflect infrared light. The infrared light reflected by the fourth polarization beam splitter 2024 may pass through the second wave plate 2062 and enter the second side B of the first polarization beam splitter 2021.
第一偏振分光器2021还包括红外反射层。因此，第一偏振分光器2021可以反射红外光。经第一偏振分光器2021反射的红外光可以射入图像传感器2040。投影区域2002与图像传感器2040满足物像共轭关系，可以通过图像传感器2040采集红外光，以确定用户的指示位置。因此，图像处理器(图20未示出)可以根据图像传感器采集到的采集结果以及光阀采集到的采集结果，确定用户在投影图像上的指示位置。The first polarization beam splitter 2021 further includes an infrared reflective layer. Therefore, the first polarization beam splitter 2021 can reflect infrared light. The infrared light reflected by the first polarization beam splitter 2021 may be incident on the image sensor 2040. The projection area 2002 and the image sensor 2040 satisfy the object-image conjugate relationship, and infrared light can be collected by the image sensor 2040 to determine the user's indicated position. Therefore, the image processor (not shown in FIG. 20) can determine the user's indicated position on the projection image according to the collection result collected by the image sensor and the collection result collected by the light valve.
在图20所示的实施例中，第一偏振分光器2021、第四偏振分光器2024均可以包括红外反射层，即第一偏振分光器2021、第四偏振分光器2024均可以反射第一偏振光、红外光，透射除第一偏振光、红外光以外的其他光。图21是本申请提供的另一种投影设备的结构性示意图。与图20所示的投影设备2001相比，图21所示的第一偏振分光器2021、第四偏振分光器2024均可以反射第一偏振光、透射第二偏振光，而均不包括红外反射层。因此，与图20所示的投影设备2001相比，图21所示的投影设备2101还包括设置在第四偏振分光器2124与成像透镜2150之间的第一红外偏振转换器2160。并且，图21所示的 示例将图20中的第二波片2062替换为第四偏振干涉滤光片2174。In the embodiment shown in FIG. 20, both the first polarization beam splitter 2021 and the fourth polarization beam splitter 2024 may include an infrared reflective layer, that is, the first polarization beam splitter 2021 and the fourth polarization beam splitter 2024 may both reflect the first polarization. Light and infrared light transmit light other than the first polarized light and infrared light. FIG. 21 is a schematic structural diagram of another projection device provided by the present application. Compared with the projection device 2001 shown in FIG. 20, the first polarizing beam splitter 2021 and the fourth polarizing beam splitter 2024 shown in FIG. 21 can both reflect the first polarized light and transmit the second polarized light, but neither includes infrared reflection. Floor. Therefore, compared with the projection device 2001 shown in FIG. 20, the projection device 2101 shown in FIG. 21 further includes a first infrared polarization converter 2160 disposed between the fourth polarization beam splitter 2124 and the imaging lens 2150. In addition, the example shown in FIG. 21 replaces the second wave plate 2062 in FIG. 20 with the fourth polarization interference filter 2174.
第四偏振干涉滤光片2174可以转换第一波长的光的偏振方向，第一波长的光不包括红外光。例如可以将来自第一偏振分光器2121的第一波长的第二偏振光转换为第一波长的第一偏振光。第四偏振干涉滤光片2174可以不改变不是第一波长的光的偏振方向。第四偏振干涉滤光片2174射出的光可以入射至第四偏振分光器2124。The fourth polarization interference filter 2174 can convert the polarization direction of the light of the first wavelength, and the light of the first wavelength does not include infrared light. For example, the second polarized light of the first wavelength from the first polarization beam splitter 2121 can be converted into the first polarized light of the first wavelength. The fourth polarization interference filter 2174 may not change the polarization direction of light having a wavelength other than the first wavelength. The light emitted by the fourth polarization interference filter 2174 may be incident on the fourth polarization beam splitter 2124.
来自第四偏振分光器2124的光可以穿过第一红外偏振转换器2160到达成像透镜2150。第一红外偏振转换器2160可以将来自成像透镜2150的红外光转换为第一偏振红外光，第一偏振红外光属于第一偏振光。第一红外偏振转换器2160射出的红外光可以经第四偏振分光器2124反射至第四偏振干涉滤光片2174。第四偏振干涉滤光片2174无法改变红外光的偏振方向，因此第四偏振分光器2124射出的第一偏振红外光可以穿过第四偏振干涉滤光片2174，并入射至第一偏振分光器2121。第一偏振红外光可以经第一偏振分光器2121反射至图像传感器2140。The light from the fourth polarization beam splitter 2124 may pass through the first infrared polarization converter 2160 to reach the imaging lens 2150. The first infrared polarization converter 2160 can convert the infrared light from the imaging lens 2150 into the first polarized infrared light, and the first polarized infrared light belongs to the first polarized light. The infrared light emitted by the first infrared polarization converter 2160 may be reflected by the fourth polarization beam splitter 2124 to the fourth polarization interference filter 2174. The fourth polarization interference filter 2174 cannot change the polarization direction of infrared light, so the first polarization infrared light emitted by the fourth polarization beam splitter 2124 can pass through the fourth polarization interference filter 2174 and enter the first polarization beam splitter. 2121. The first polarized infrared light may be reflected to the image sensor 2140 through the first polarizing beam splitter 2121.
对于图21所示的投影设备2101，通过在第四偏振分光器2124与成像透镜2150之间设置第一红外偏振转换器2160，并在第一偏振分光器2121与第四偏振分光器2124之间设置第四偏振干涉滤光片2174，使得到达第一偏振分光器2121的红外光基本属于第一偏振光，从而来自成像透镜2150的大部分红外光可以经第四偏振分光器2124、第一偏振分光器2121反射至图像传感器2140。因此，红外光到达图像传感器2140的光强可以较高。For the projection device 2101 shown in FIG. 21, the first infrared polarization converter 2160 is provided between the fourth polarization beam splitter 2124 and the imaging lens 2150, and between the first polarization beam splitter 2121 and the fourth polarization beam splitter 2124 The fourth polarization interference filter 2174 is provided so that the infrared light reaching the first polarization beam splitter 2121 basically belongs to the first polarization light, so that most of the infrared light from the imaging lens 2150 can pass through the fourth polarization beam splitter 2124 and the first polarization beam. The beam splitter 2121 is reflected to the image sensor 2140. Therefore, the intensity of infrared light reaching the image sensor 2140 may be higher.
图22是本申请提供的一种投影设备的结构性示意图。投影设备2201可以是如图1至图3中的投影设备110。投影设备2201发出的光可以投影在投影区域2202，从而在该投影区域2202上可以显示有图像。投影区域2202可以是如图1至图3中的投影区域122。FIG. 22 is a schematic structural diagram of a projection device provided by the present application. The projection device 2201 may be the projection device 110 as shown in FIGS. 1 to 3. The light emitted by the projection device 2201 can be projected on the projection area 2202, so that an image can be displayed on the projection area 2202. The projection area 2202 may be the projection area 122 as shown in FIGS. 1 to 3.
投影设备2201可以包括第二光处理器2210、第一偏振分光器2220、第一光阀2230、第二红外偏振转换器2260、成像透镜2250、图像传感器2240。The projection device 2201 may include a second light processor 2210, a first polarization beam splitter 2220, a first light valve 2230, a second infrared polarization converter 2260, an imaging lens 2250, and an image sensor 2240.
第二光处理器2210可以射出第二偏振可见光。该第二偏振可见光的波长例如可以是380nm～780nm。该第二偏振可见光属于第二偏振光。第二偏振光例如可以是S偏振光或P偏振光。S偏振光可以指光的偏振方向与入射面垂直。P偏振光可以指光的偏振方向平行于入射面。第二光处理器2210发出的光包含投影图像的图像信息。上文已通过图4所示的实施例对光处理器进行了阐述，在此就不必再赘述。The second light processor 2210 can emit the second polarized visible light. The wavelength of the second polarized visible light may be, for example, 380 nm to 780 nm. The second polarized visible light belongs to the second polarized light. The second polarized light may be S-polarized light or P-polarized light, for example. S-polarized light can mean that the polarization direction of the light is perpendicular to the incident surface. P-polarized light can mean that the polarization direction of light is parallel to the incident surface. The light emitted by the second light processor 2210 contains image information of the projected image. The optical processor has been described above through the embodiment shown in FIG. 4, and it is not necessary to repeat it here.
第一偏振分光器2220可以反射第一偏振光，并透射第二偏振光。该第一偏振光的偏振方向垂直于该第二偏振光的偏振方向。来自第二光处理器2210的第二偏振可见光可以透射第一偏振分光器2220，并垂直射入第一光阀2230。The first polarization beam splitter 2220 may reflect the first polarized light and transmit the second polarized light. The polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light. The second polarized visible light from the second light processor 2210 can transmit through the first polarization beam splitter 2220 and enter the first light valve 2230 perpendicularly.
第一光阀2230可以采集入射的第二偏振可见光将入射的第二偏振可见光转变为第一偏振可见光，并射出该第一偏振可见光。该第一偏振可见光属于该第一偏振光。根据光的可逆性可知，第一光阀2230垂直射出的第一偏振可见光可以入射至第一偏振分光器2220。又由于第一偏振分光器2220可以反射第一偏振光，因此第一光阀2230射出的第一偏振可见光可以经第一偏振分光器2220反射至第二红外偏振转换器2260。The first light valve 2230 can collect the incident second polarized visible light, convert the incident second polarized visible light into the first polarized visible light, and emit the first polarized visible light. The first polarized visible light belongs to the first polarized light. According to the reversibility of light, the first polarized visible light emitted perpendicularly from the first light valve 2230 can be incident on the first polarization beam splitter 2220. In addition, since the first polarization beam splitter 2220 can reflect the first polarization light, the first polarization visible light emitted by the first light valve 2230 can be reflected to the second infrared polarization converter 2260 through the first polarization beam splitter 2220.
第二红外偏振转换器2260例如可以是第二偏振转换器。该第二偏振转换器可以将该第二偏振转换器的入射光转换为第二偏振光。例如，入射至第二偏振转换器的光包括第一偏振光以及第二偏振光，第二偏振转换器可以将入射的第一偏振光转换为第二偏振光，并透射入射的第二偏振光。第二红外偏振转换器2260例如可以位于第一偏振分光器2220与 成像透镜2250之间。来自第一光阀2230的第一偏振可见光可以穿过第二红外偏振转换器2260，并入射至成像透镜2250。The second infrared polarization converter 2260 may be, for example, a second polarization converter. The second polarization converter can convert the incident light of the second polarization converter into a second polarized light. For example, the light incident to the second polarization converter includes the first polarized light and the second polarized light. The second polarization converter can convert the incident first polarized light into the second polarized light and transmit the incident second polarized light. . The second infrared polarization converter 2260 may be located between the first polarization beam splitter 2220 and the imaging lens 2250, for example. The first polarized visible light from the first light valve 2230 may pass through the second infrared polarization converter 2260 and be incident to the imaging lens 2250.
成像透镜2250可以将投影图像成像在投影区域2202内。也就是说，第一光阀2230射出的、包含有投影图像的图像信息的光可以穿过成像透镜2250、射出投影设备2201并投影在投影区域2202内。因此，第一光阀2230与投影区域2202满足物像共轭关系。The imaging lens 2250 can image the projection image in the projection area 2202. In other words, the light emitted by the first light valve 2230 and containing the image information of the projected image can pass through the imaging lens 2250, exit the projection device 2201, and be projected in the projection area 2202. Therefore, the first light valve 2230 and the projection area 2202 satisfy the object-image conjugate relationship.
可以通过射入投影设备2201的红外光，确定用户在投影图像上所指示的位置2203，进而实现用户与投影设备2201之间的交互。用户在投影图像上所指示的位置2203可以在成像透镜2250远离投影区域2202的一侧形成实像。射入投影设备2201的红外光可以穿过成像透镜2250，到达第二红外偏振转换器2260。图22中双点虚线表示红外光，带箭头的实线表示包含投影图像的图像信息的可见光。The position 2203 indicated by the user on the projected image can be determined by the infrared light incident on the projection device 2201, so as to realize the interaction between the user and the projection device 2201. The position 2203 indicated by the user on the projection image may form a real image on the side of the imaging lens 2250 away from the projection area 2202. The infrared light incident on the projection device 2201 may pass through the imaging lens 2250 and reach the second infrared polarization converter 2260. In FIG. 22, the double-dot dashed line represents infrared light, and the solid line with arrows represents visible light including image information of the projected image.
第二红外偏振转换器2260可以将来自成像透镜2250的红外光转换为第二偏振红外光，该第二偏振红外光属于第二偏振光。根据光的可逆性可知，第二红外偏振转换器2260射出的第二偏振红外光可以入射至第一偏振分光器2220。又由于第一偏振分光器2220可以透射第二偏振光，因此，第二红外偏振转换器2260射出的红外光可以穿过第一偏振分光器2220，并射入图像传感器2240。图像传感器1540可以采集来自第一偏振分光器2220的红外光。The second infrared polarization converter 2260 can convert the infrared light from the imaging lens 2250 into the second polarized infrared light, and the second polarized infrared light belongs to the second polarized light. According to the reversibility of light, the second polarized infrared light emitted by the second infrared polarization converter 2260 can be incident on the first polarization beam splitter 2220. In addition, since the first polarization beam splitter 2220 can transmit the second polarization light, the infrared light emitted by the second infrared polarization converter 2260 can pass through the first polarization beam splitter 2220 and enter the image sensor 2240. The image sensor 1540 may collect infrared light from the first polarization beam splitter 2220.
投影区域2202与图像传感器2240满足物像共轭关系。又由于第一光阀2231与投影区域2202满足物像共轭关系。因此，可以根据图像传感器2240采集到的信号，以及第一光阀2231采集到的信号，确定用户在投影图像上指示的位置2203。The projection area 2202 and the image sensor 2240 satisfy the object-image conjugate relationship. In addition, the first light valve 2231 and the projection area 2202 satisfy the object-image conjugate relationship. Therefore, the position 2203 indicated by the user on the projection image can be determined according to the signal collected by the image sensor 2240 and the signal collected by the first light valve 2231.
图23是本申请提供的一种投影设备的结构性示意图。投影设备2301可以是如图1至图3中的投影设备110。投影设备2301发出的光可以投影在投影区域2302，从而在该投影区域2302上可以显示有图像。投影区域2302可以是如图1至图3中的投影区域120。FIG. 23 is a schematic structural diagram of a projection device provided by the present application. The projection device 2301 may be the projection device 110 as shown in FIGS. 1 to 3. The light emitted by the projection device 2301 can be projected on the projection area 2302, so that an image can be displayed on the projection area 2302. The projection area 2302 may be the projection area 120 as shown in FIGS. 1 to 3.
投影设备2301可以包括第二光处理器2310、第一偏振分光器2321、第二偏振分光器2322、第三偏振分光器2323、第一光阀2331、第二光阀2332、第三光阀2333、第一偏振转换器2361、第五偏振干涉滤光片2362、合光器2370、成像透镜2350以及图像传感器2340。The projection device 2301 may include a second light processor 2310, a first polarization beam splitter 2321, a second polarization beam splitter 2322, a third polarization beam splitter 2323, a first light valve 2331, a second light valve 2332, a third light valve 2333 , The first polarization converter 2361, the fifth polarization interference filter 2362, the light combiner 2370, the imaging lens 2350, and the image sensor 2340.
第二光处理器2310可以射出第二偏振可见光。第二光处理器2310发出的第二偏振可见光可以入射至第一偏振分光器2321。该第二偏振可见光属于第二偏振光。第二偏振光例如可以是P偏振光或S偏振光。第二偏振可见光的波长可以是第一波长。因此，第二偏振可见光可以是第一波长的第二偏振光。第二光处理器2310还可以射出第二波长的第二偏振光、第三波长的第二偏振光。第一波长例如可以在625～740nm范围内。第二波长例如可以在440～475nm范围内。第三波长例如可以在492～577nm范围内。因此，第二光处理器2310发出的光包含投影图像中与第一波长相关的信息、与第二波长相关的信息、与第三波长相关的信息。应理解，本申请对于第一波长、第二波长、第三波长的波长范围不作限定。应理解，上文已通过图19所示的实施例对光处理器进行了阐述，在此就不必再赘述。The second light processor 2310 can emit the second polarized visible light. The second polarized visible light emitted by the second light processor 2310 may be incident on the first polarization beam splitter 2321. The second polarized visible light belongs to the second polarized light. The second polarized light may be, for example, P-polarized light or S-polarized light. The wavelength of the second polarized visible light may be the first wavelength. Therefore, the second polarized visible light may be the second polarized light of the first wavelength. The second optical processor 2310 can also emit second polarized light with a second wavelength and a second polarized light with a third wavelength. The first wavelength may be in the range of 625 to 740 nm, for example. The second wavelength may be in the range of 440 to 475 nm, for example. The third wavelength may be in the range of 492 to 577 nm, for example. Therefore, the light emitted by the second light processor 2310 includes information related to the first wavelength, information related to the second wavelength, and information related to the third wavelength in the projected image. It should be understood that this application does not limit the wavelength ranges of the first wavelength, the second wavelength, and the third wavelength. It should be understood that the optical processor has been described above through the embodiment shown in FIG. 19, and it is not necessary to repeat it here.
第一偏振分光器2321、第二偏振分光器2322、第三偏振分光器2323均可以反射第一偏振光，并透射第二偏振光，第一偏振光的偏振方向垂直于第二偏振光的偏振方向。The first polarization beam splitter 2321, the second polarization beam splitter 2322, and the third polarization beam splitter 2323 can both reflect the first polarization light and transmit the second polarization light, and the polarization direction of the first polarization light is perpendicular to that of the second polarization light. direction.
来自第二光处理器2310的第一波长的第二偏振光可以透射第一偏振分光器2321，并 垂直射入第一光阀2331。第一光阀2331可以采集入射的第一波长的第二偏振光，将入射的第一波长的第二偏振光转变为第一波长的第一偏振光，并射出该第一波长的第一偏振光。根据光的可逆性可知，第一光阀2331垂直射出的第一波长的第一偏振光可以入射至第一偏振分光器2321。由于第一偏振分光器2321可以反射第一偏振光，因此来自第一光阀2331的第一波长的第一偏振光可以经第一偏振分光器2321反射至第五偏振干涉滤光片2362。The second polarized light of the first wavelength from the second light processor 2310 can transmit through the first polarization beam splitter 2321 and enter the first light valve 2331 vertically. The first light valve 2331 can collect the incident second polarized light of the first wavelength, convert the incident second polarized light of the first wavelength into the first polarized light of the first wavelength, and emit the first polarized light of the first wavelength. Light. According to the reversibility of light, the first polarized light of the first wavelength emitted perpendicularly from the first light valve 2331 can be incident on the first polarization beam splitter 2321. Since the first polarization beam splitter 2321 can reflect the first polarization light, the first polarization light of the first wavelength from the first light valve 2331 can be reflected by the first polarization beam splitter 2321 to the fifth polarization interference filter 2362.
第五偏振干涉滤光片2362可以转换红外光的偏振方向，例如可以将第一偏振红外光转换为第二偏振红外光，第一偏振红外光属于第一偏振光，第二偏振红外光属于第二偏振光。来自第一光阀2331的光主要是可见光，因此经第一偏振分光器2321反射的第一波长的光可以穿过第五偏振干涉滤光片2362，并射至合光器2370。The fifth polarization interference filter 2362 can convert the polarization direction of infrared light. For example, it can convert the first polarization infrared light into the second polarization infrared light. The first polarization infrared light belongs to the first polarization light, and the second polarization infrared light belongs to the second polarization. Two-polarized light. The light from the first light valve 2331 is mainly visible light, so the light of the first wavelength reflected by the first polarization beam splitter 2321 can pass through the fifth polarization interference filter 2362 and be emitted to the light combiner 2370.
来自第二光处理器2310的第二波长的第二偏振光可以透射第二偏振分光器2322，并垂直射入第二光阀2332。第二光阀2332可以采集入射的第二波长的第二偏振光，将入射的第二波长的第二偏振光转变为第二波长的第一偏振光，并垂直射出该第二波长的第一偏振光。根据光的可逆性可知，第二光阀2332射出的第二波长的第一偏振光可以入射至第二偏振分光器2322。由于第二偏振分光器2322可以反射第一偏振光，因此来自第二光阀2332的第二波长的第一偏振光可以经第二偏振分光器2322反射至合光器2370。The second polarized light of the second wavelength from the second light processor 2310 may transmit through the second polarization beam splitter 2322 and enter the second light valve 2332 perpendicularly. The second light valve 2332 can collect the incident second polarized light of the second wavelength, convert the incident second polarized light of the second wavelength into the first polarized light of the second wavelength, and emit the first polarized light of the second wavelength vertically. polarized light. According to the reversibility of light, the first polarized light of the second wavelength emitted by the second light valve 2332 can be incident on the second polarization beam splitter 2322. Since the second polarization beam splitter 2322 can reflect the first polarization light, the first polarization light of the second wavelength from the second light valve 2332 can be reflected to the light combiner 2370 through the second polarization beam splitter 2322.
来自第二光处理器2310的第三波长的第二偏振光可以透射第三偏振分光器2323，并垂直射入第三光阀2333。第三光阀2333可以采集入射的第三波长的第二偏振光，将入射的第三波长的第二偏振光转变为第三波长的第一偏振光，并垂直射出该第三波长的第一偏振光。根据光的可逆性可知，第三光阀2333射出的第三波长的第一偏振光可以入射至第三偏振分光器2323。由于第三偏振分光器2323可以反射第一偏振光，因此来自第三光阀2333的第三波长的第一偏振光可以经第三偏振分光器2323反射至合光器2370。The second polarized light of the third wavelength from the second light processor 2310 can transmit through the third polarization beam splitter 2323 and enter the third light valve 2333 perpendicularly. The third light valve 2333 can collect the incident second polarized light of the third wavelength, convert the incident second polarized light of the third wavelength into the first polarized light of the third wavelength, and vertically emit the first polarized light of the third wavelength. polarized light. According to the reversibility of light, the first polarized light of the third wavelength emitted by the third light valve 2333 can be incident on the third polarization beam splitter 2323. Since the third polarization beam splitter 2323 can reflect the first polarization light, the first polarization light of the third wavelength from the third light valve 2333 can be reflected to the light combiner 2370 through the third polarization beam splitter 2323.
合光器2370可以汇合来自第一光阀2331、第二光阀2332以及第三光阀2333的光，该汇合后的光可以从合光器2370可以沿目标方向从合光器2370射出。从而，投影图像中与第一波长相关的信息、投影图像中与第二波长相关的信息、投影图像中与第三波长相关信息可以汇合在一起，形成完整的投影图像。来自第一光阀2331的第一波长的光、来自第二光阀2332的第二波长的光、来自第三光阀2333的第三波长的光可以射入合光器2370。The light combiner 2370 can converge the light from the first light valve 2331, the second light valve 2332, and the third light valve 2333, and the combined light can be emitted from the light combiner 2370 from the light combiner 2370 in a target direction. Therefore, the information related to the first wavelength in the projected image, the information related to the second wavelength in the projected image, and the information related to the third wavelength in the projected image can be combined to form a complete projected image. The light of the first wavelength from the first light valve 2331, the light of the second wavelength from the second light valve 2332, and the light of the third wavelength from the third light valve 2333 may enter the light combiner 2370.
合光器2370可以包括垂直且相交的第一反射层2371以及第二反射层2372。第二反射层2372可以将第一反射层2371划分为第一部分以及第二部分，第一部分的面积与第二部分的面积可以相同或大体相同。第一反射层2371可以将第二反射层2372划分为第三部分以及第四部分，第三部分的面积与第四部分的面积可以相同或大体相同。The light combiner 2370 may include a first reflective layer 2371 and a second reflective layer 2372 that are perpendicular and intersecting. The second reflective layer 2372 may divide the first reflective layer 2371 into a first part and a second part, and the area of the first part and the area of the second part may be the same or substantially the same. The first reflective layer 2371 may divide the second reflective layer 2372 into a third part and a fourth part, and the area of the third part and the area of the fourth part may be the same or substantially the same.
第一反射层2371可以反射该第一波长的光以及红外光。例如，第一反射层2371可以包括红外反射层。来自第一光阀2331的第一波长的光可以经第一反射层2371反射。经第一反射层2371反射的第一波长的光可以沿该目标方向自第一反射层2371射出。波长不是第一波长的光，以及不属于红外光的光(如第二波长的光、第三波长的光)均可以透射第一反射层2371。例如，第一波长的光可以是红光，第一反射层2371可以反射红光、红外光，并透射绿光、蓝光。The first reflective layer 2371 can reflect the light of the first wavelength and infrared light. For example, the first reflective layer 2371 may include an infrared reflective layer. The light of the first wavelength from the first light valve 2331 may be reflected by the first reflective layer 2371. The light of the first wavelength reflected by the first reflective layer 2371 may be emitted from the first reflective layer 2371 along the target direction. Light whose wavelength is not the first wavelength and light that is not infrared light (such as light of the second wavelength and light of the third wavelength) can transmit through the first reflective layer 2371. For example, the light of the first wavelength may be red light, and the first reflective layer 2371 may reflect red light and infrared light, and transmit green light and blue light.
第二反射层2372可以反射该第二波长的光。来自第二光阀2332的第二波长的光可以经第二反射层2372反射。经第二反射层2372反射的波长第二波长的光可以沿该目标方向 自第二反射层2372射出。不是该第二波长的光(如第一波长的光、第三波长的光、红外光)可以透射第二反射层2372。例如第二波长的光可以是蓝光，第二反射层2372可以反射蓝光，并透射红光、红外光、绿光。The second reflective layer 2372 may reflect light of the second wavelength. The light of the second wavelength from the second light valve 2332 may be reflected by the second reflective layer 2372. The light of the second wavelength reflected by the second reflective layer 2372 can be emitted from the second reflective layer 2372 along the target direction. Light that is not the second wavelength (eg, light of the first wavelength, light of the third wavelength, infrared light) may transmit the second reflective layer 2372. For example, the light of the second wavelength may be blue light, and the second reflective layer 2372 may reflect blue light and transmit red light, infrared light, and green light.
合光器2370汇合的光可以穿过第一偏振转换器2361，并入射至成像透镜2350。第一偏振转换器2361可以将该第一偏振转换器2361的入射光转换为第一偏振光。The light converged by the light combiner 2370 may pass through the first polarization converter 2361 and be incident on the imaging lens 2350. The first polarization converter 2361 may convert the incident light of the first polarization converter 2361 into first polarized light.
成像透镜2350可以将投影图像成像在投影区域2302内。也就是说，合光器2370射出的、包含有投影图像信息的光可以穿过成像透镜2350投影在投影区域2302内。由于合光器2370是汇合由第一光阀2331、第二光阀2332以及第三光阀2333射出的光，因此第一光阀2331与投影区域2302满足物像共轭关系，第二光阀2332与投影区域2302满足物像共轭关系，且第三光阀2333与投影区域2302满足物像共轭关系。The imaging lens 2350 can image the projected image in the projection area 2302. In other words, the light emitted by the light combiner 2370 and containing projection image information may pass through the imaging lens 2350 and be projected in the projection area 2302. Since the light combiner 2370 combines the light emitted by the first light valve 2331, the second light valve 2332, and the third light valve 2333, the first light valve 2331 and the projection area 2302 meet the object-image conjugate relationship, and the second light valve 2332 and the projection area 2302 satisfy the object-image conjugate relationship, and the third light valve 2333 and the projection area 2302 satisfy the object-image conjugate relationship.
可以通过射入投影设备2301的红外光，确定用户在投影图像上所指示的位置2303，进而实现用户与投影设备2301之间的交互。用户在投影图像上所指示的位置2303可以在成像透镜2350远离投影区域2302的一侧形成实像。射入投影设备2301的红外光可以穿过成像透镜2350到达第一偏振转换器2361。The position 2303 indicated by the user on the projected image can be determined by the infrared light incident on the projection device 2301, so as to realize the interaction between the user and the projection device 2301. The position 2303 indicated by the user on the projection image may form a real image on the side of the imaging lens 2350 away from the projection area 2302. The infrared light incident on the projection device 2301 may pass through the imaging lens 2350 to reach the first polarization converter 2361.
第一偏振转换器2361可以将来自成像透镜2350的红外光转换为第一偏振红外光，该第一偏振红外光属于第一偏振光。根据光的可逆性，第一偏振转换器2361射出的红外光可以沿该目标方向的相反方向入射至合光器2370。The first polarization converter 2361 can convert the infrared light from the imaging lens 2350 into the first polarized infrared light, and the first polarized infrared light belongs to the first polarized light. According to the reversibility of light, the infrared light emitted by the first polarization converter 2361 can be incident on the light combiner 2370 in the opposite direction of the target direction.
由于第一反射层2371可以反射红外光，而第二反射层2372可以透射红外光；又由于来自第一偏振分光器2321的第一波长的光沿目标方向射出合光器2370。因此，入射至合光器2370的红外光可以在合光器2370的第一反射层2371上发生反射，并射出合光器2370。Because the first reflective layer 2371 can reflect infrared light, and the second reflective layer 2372 can transmit infrared light; and because the light of the first wavelength from the first polarization beam splitter 2321 exits the light combiner 2370 in the target direction. Therefore, the infrared light incident on the light combiner 2370 can be reflected on the first reflective layer 2371 of the light combiner 2370 and exit the light combiner 2370.
来自合光器2370的红外光可以穿过第五偏振干涉滤光片2362，并入射至第一偏振分光器2321。由于第五偏振干涉滤光片2362可以转换红外光的偏振方向，因此，第五偏振干涉滤光片2362可以将来自合光器2370的第一偏振红外光转换为第二偏振红外光。偏振干涉滤光片2362射出的第二偏振红外光可以入射至第一偏振分光器2321，第二偏振红外光属于该第二偏振光。The infrared light from the light combiner 2370 may pass through the fifth polarization interference filter 2362 and be incident to the first polarization beam splitter 2321. Since the fifth polarization interference filter 2362 can convert the polarization direction of infrared light, the fifth polarization interference filter 2362 can convert the first polarization infrared light from the light combiner 2370 into the second polarization infrared light. The second polarized infrared light emitted by the polarization interference filter 2362 may be incident on the first polarizing beam splitter 2321, and the second polarized infrared light belongs to the second polarized light.
第一偏振分光器2321可以反射第一偏振光并透射第二偏振光。来自第一偏振分光器2321的红外光可以透射第一偏振分光器2321，并入射至图像传感器2340。图像传感器2340可以采集来自第一偏振分光器2321的红外光。The first polarization beam splitter 2321 may reflect the first polarized light and transmit the second polarized light. The infrared light from the first polarization beam splitter 2321 may transmit through the first polarization beam splitter 2321 and be incident to the image sensor 2340. The image sensor 2340 can collect infrared light from the first polarization beam splitter 2321.
由于投影区域2302与图像传感器2340满足物像共轭关系，因此可以通过图像传感器2340采集红外光，以确定用户的指示位置。又由于第一光阀2331、第二光阀2332、第三光阀2333均与投影区域2302满足物像共轭关系，第一光阀2331、第二光阀2332、第三光阀2333中的一个或多个可以采集在投影区域2302内的投影图像。因此，图像处理器(图23未示出)可以根据图像传感器采集到的采集结果以及光阀采集到的采集结果，确定用户在投影图像上的指示位置。Since the projection area 2302 and the image sensor 2340 satisfy the object-image conjugate relationship, infrared light can be collected by the image sensor 2340 to determine the user's indicated position. Since the first light valve 2331, the second light valve 2332, and the third light valve 2333 all satisfy the object-image conjugate relationship with the projection area 2302, the first light valve 2331, the second light valve 2332, and the third light valve 2333 One or more projection images within the projection area 2302 can be collected. Therefore, the image processor (not shown in FIG. 23) can determine the user's indicated position on the projection image according to the collection result collected by the image sensor and the collection result collected by the light valve.
需要说明的是，由于射入投影设备2301的红外光可以经第一偏振转换器2361、第五偏振干涉滤光片2362被转换为第二偏振红外光，且第五偏振干涉滤光片2362射出的光可以入射至第一偏振分光器2321，因此第一偏振转换器2361、第五偏振干涉滤光片2362的组合可以被视为第二红外偏振转换器。其中，该第二红外偏振转换器可以用于将射入投影 设备的红外光转换为第二偏振红外光，该第二偏振红外光属于第二偏振光，该第二红外偏振转换器射出的红外光可以入射至第一偏振分光器。It should be noted that since the infrared light incident on the projection device 2301 can be converted into the second polarization infrared light by the first polarization converter 2361, the fifth polarization interference filter 2362, and the fifth polarization interference filter 2362 is emitted. The light of may be incident to the first polarization beam splitter 2321, so the combination of the first polarization converter 2361 and the fifth polarization interference filter 2362 can be regarded as the second infrared polarization converter. Wherein, the second infrared polarization converter can be used to convert the infrared light incident on the projection device into second polarization infrared light, the second polarization infrared light belongs to the second polarization light, and the infrared light emitted by the second infrared polarization converter Light may be incident to the first polarization beam splitter.
对于图23所示的投影设备2301，通过在第一偏振分光器2321与成像透镜2350之间设置第一偏振转换器2361、第五偏振干涉滤光片2362，使得到达第一偏振分光器2321的红外光基本属于第二偏振光，从而来自成像透镜2350的大部分红外光可以透射第一偏振分光器2321并入射至图像传感器2340。因此，红外光到达图像传感器2340的光强可以较高。For the projection device 2301 shown in FIG. 23, the first polarization converter 2361 and the fifth polarization interference filter 2362 are arranged between the first polarization beam splitter 2321 and the imaging lens 2350, so that the light beam reaches the first polarization beam splitter 2321. The infrared light basically belongs to the second polarized light, so that most of the infrared light from the imaging lens 2350 can be transmitted through the first polarization beam splitter 2321 and be incident to the image sensor 2340. Therefore, the intensity of infrared light reaching the image sensor 2340 may be higher.
在图23所示的实施例中，合光器垂直且相交的第一反射层2371以及第二反射层2372。第一反射层2371可以反射第一波长的光以及红外光，透射不属于第一波长的光以及红外光。图24是本申请提供的另一种投影设备的结构性示意图。In the embodiment shown in FIG. 23, the first reflective layer 2371 and the second reflective layer 2372 of the light combiner are perpendicular and intersecting. The first reflective layer 2371 may reflect light of the first wavelength and infrared light, and transmit light that does not belong to the first wavelength and infrared light. FIG. 24 is a schematic structural diagram of another projection device provided by the present application.
如图24所示，来自第一光阀2431的第一波长的光、来自第二光阀2432的第二波长的光、来自第三光阀2433的第三波长的光可以入射至合光器2470。As shown in FIG. 24, the light of the first wavelength from the first light valve 2431, the light of the second wavelength from the second light valve 2432, and the light of the third wavelength from the third light valve 2433 may be incident on the light combiner. 2470.
与图23所示的合光器2370相比，图24所示的合光器2470可以包括垂直且相交的第三反射层2471以及第四反射层2472。第四反射层2472可以将第三反射层2471划分为第五部分以及第六部分，第五部分的面积与第六部分的面积可以相同或大体相同。第三反射层2471可以将第四反射层2472划分为第七部分以及第八部分，第七部分的面积与第八部分的面积可以相同或大体相同。第三反射层2471可以反射第三波长的光，透射波长不是第三波长的光(如第一波长的光、第二波长的光、红外光)。例如，第三波长的光可以是绿光，第三反射层2471可以反射绿光，并透射红光、蓝光、红外光。因此，来自第三光阀2433的第三波长的光可以在第三反射层2471上发生反射，并沿该目标方向自第四反射层2472射出。第四反射层2472可以反射第二波长的光，透射波长不是第二波长的光(如第一波长的光、第三波长的光、红外光)。例如第二波长的光可以是蓝光，第四反射层2472可以反射蓝光，并透射红光、红外光、绿光。因此，来自第二光阀2432的第二波长的光可以在第四反射层2472上发生反射，并沿该目标方向自第四反射层2472射出。从而，来自第一光阀2431、第二光阀2432以及第三光阀2433的光可以沿该目标方向射出合光器2470。Compared with the light combiner 2370 shown in FIG. 23, the light combiner 2470 shown in FIG. 24 may include a third reflective layer 2471 and a fourth reflective layer 2472 that are perpendicular and intersecting. The fourth reflective layer 2472 may divide the third reflective layer 2471 into a fifth part and a sixth part, and the area of the fifth part and the area of the sixth part may be the same or substantially the same. The third reflective layer 2471 may divide the fourth reflective layer 2472 into a seventh part and an eighth part, and the area of the seventh part and the area of the eighth part may be the same or substantially the same. The third reflective layer 2471 can reflect light of a third wavelength, and transmit light of a wavelength other than the third wavelength (such as light of the first wavelength, light of the second wavelength, infrared light). For example, the light of the third wavelength may be green light, and the third reflective layer 2471 may reflect green light and transmit red light, blue light, and infrared light. Therefore, the light of the third wavelength from the third light valve 2433 can be reflected on the third reflective layer 2471 and emitted from the fourth reflective layer 2472 in the target direction. The fourth reflective layer 2472 may reflect light of the second wavelength and transmit light of a wavelength other than the second wavelength (such as light of the first wavelength, light of the third wavelength, infrared light). For example, the light of the second wavelength may be blue light, and the fourth reflective layer 2472 may reflect blue light and transmit red light, infrared light, and green light. Therefore, the light of the second wavelength from the second light valve 2432 can be reflected on the fourth reflective layer 2472 and emitted from the fourth reflective layer 2472 in the target direction. Thus, the light from the first light valve 2431, the second light valve 2432, and the third light valve 2433 can exit the light combiner 2470 along the target direction.
另外，与图23所示的示例相比，图24所示的实施例将图23中的第一偏振转换器2361替换为第二偏振转换器2460，并且不包括如图23中的第五偏振干涉滤光片2362，其中，第二偏振转换器2460可以将该第二偏振转换器2460的入射光转换为第二偏振光。In addition, compared with the example shown in FIG. 23, the embodiment shown in FIG. 24 replaces the first polarization converter 2361 in FIG. 23 with the second polarization converter 2460, and does not include the fifth polarization converter as shown in FIG. The interference filter 2362, wherein the second polarization converter 2460 can convert the incident light of the second polarization converter 2460 into a second polarized light.
射入投影设备的红外光经第二偏振转换器2460转换为第二偏振红外光，并沿该目标方向的相反方向入射至合光器2470，第二偏振红外光属于第二偏振光。由于第三反射层2471、第四反射层2472均可以透射红外光。因此，来自第二偏振转换器2460的第二偏振红外光可以沿目标方向的相反方向射出合光器2470。根据光的可逆性可知，合光器2470射出的第二偏振红外光可以入射至第一偏振分光器2421。又由于第一偏振分光器2421可以透射第二偏振光，因此，来自合光器2470的第二偏振红外光可以透射第一偏振分光器2421，并射入图像传感器2440。The infrared light incident on the projection device is converted into second polarized infrared light by the second polarization converter 2460, and enters the light combiner 2470 in the opposite direction of the target direction. The second polarized infrared light belongs to the second polarized light. Since the third reflective layer 2471 and the fourth reflective layer 2472 can transmit infrared light. Therefore, the second polarized infrared light from the second polarization converter 2460 can exit the light combiner 2470 in a direction opposite to the target direction. According to the reversibility of light, the second polarized infrared light emitted by the light combiner 2470 can be incident on the first polarized beam splitter 2421. In addition, since the first polarization beam splitter 2421 can transmit the second polarization light, the second polarization infrared light from the light combiner 2470 can transmit the first polarization beam splitter 2421 and enter the image sensor 2440.
对于图24所示的投影设备2401，通过将图23中的合光器2370替换为合光器2470，可以改变投影设备中光学器件的排布方式。另外，在图24所示的投影设备2401中，射入投影设备2401的红外光透射合光器2470中的第四反射层2472以及第三反射层2471。在 图23所示的投影设备2301中，射入投影设备2301的红外光可以在合光器2370中的第一反射层2371发生反射。由于合光器中反射层的反射率相对高于透射率，因此，投影设备2301中的图像传感器2360可以采集到光强更高的红外光。For the projection device 2401 shown in FIG. 24, by replacing the light combiner 2370 in FIG. 23 with the light combiner 2470, the arrangement of the optical devices in the projection device can be changed. In addition, in the projection device 2401 shown in FIG. 24, the infrared light incident on the projection device 2401 transmits the fourth reflective layer 2472 and the third reflective layer 2471 in the light combiner 2470. In the projection device 2301 shown in FIG. 23, the infrared light incident on the projection device 2301 can be reflected by the first reflective layer 2371 in the light combiner 2370. Since the reflectance of the reflective layer in the light combiner is relatively higher than the transmittance, the image sensor 2360 in the projection device 2301 can collect infrared light with higher light intensity.
图25是本申请提供的一种投影设备的结构性示意图。投影设备2501可以是如图1至图3中的投影设备110。投影设备2501发出的光可以投影在投影区域2502，从而在该投影区域2502上可以显示有图像。投影区域2502可以是如图1至图3中的投影区域125。FIG. 25 is a schematic structural diagram of a projection device provided by the present application. The projection device 2501 may be the projection device 110 as shown in FIGS. 1 to 3. The light emitted by the projection device 2501 can be projected on the projection area 2502, so that an image can be displayed on the projection area 2502. The projection area 2502 may be the projection area 125 as shown in FIGS. 1 to 3.
投影设备2501可以包括第二光处理器2510、第一偏振干涉滤光片2571、第二偏振干涉滤光片2572、第三偏振干涉滤光片2573、第四偏振干涉滤光片2574、第一偏振分光器2521、第二偏振分光器2522、第三偏振分光器2523、第四偏振分光器2524、第一光阀2531、第二光阀2532、第三光阀2533、成像透镜2550、图像传感器2540。The projection device 2501 may include a second light processor 2510, a first polarization interference filter 2571, a second polarization interference filter 2572, a third polarization interference filter 2573, a fourth polarization interference filter 2574, and a first polarization interference filter 2571. Polarization beam splitter 2521, second polarization beam splitter 2522, third polarization beam splitter 2523, fourth polarization beam splitter 2524, first light valve 2531, second light valve 2532, third light valve 2533, imaging lens 2550, image sensor 2540.
第二光处理器2510可以射出包括第一波长的第二偏振光、第二波长的第二偏振光、以及第三波长的第二偏振光。第二偏振光例如可以是P偏振光或S偏振光。第一波长的光例如可以是红光，第二波长的光例如可以是蓝光，第三波长的光例如可以是绿光。也就是说，第二光处理器2510发出的光可以包括第二偏振红光、第二偏振蓝光、第二偏振绿光，其中第二偏振红光、第二偏振蓝光、第二偏振绿光均属于第二偏振光。上文已通过图4所示的实施例对光处理器进行了阐述，在此就不必再赘述。The second light processor 2510 can emit the second polarized light including the first wavelength, the second polarized light with the second wavelength, and the second polarized light with the third wavelength. The second polarized light may be, for example, P-polarized light or S-polarized light. The light of the first wavelength may be red light, for example, the light of the second wavelength may be blue light, and the light of the third wavelength may be green light, for example. That is to say, the light emitted by the second light processor 2510 may include the second polarized red light, the second polarized blue light, and the second polarized green light, wherein the second polarized red light, the second polarized blue light, and the second polarized green light are all Belongs to the second polarized light. The optical processor has been described above through the embodiment shown in FIG. 4, and it is not necessary to repeat it here.
第一偏振干涉滤光片2571可以转换第一波长的光的偏振方向，例如可以将第一波长的第二偏振光转换为第一波长的第一偏振光。该第一偏振光的偏振方向垂直于该第二偏振光的偏振方向。第一偏振干涉滤光片2571可以不改变不是第一波长的光的偏振方向。例如，第一偏振干涉滤光片2571不改变第二波长的光以及第三波长的光的偏振方向。来自第二光处理器2510的光可以穿过第一偏振干涉滤光片2571到达第二偏振分光器2522。射出第一偏振干涉滤光片2571的光可以包括第一波长的第一偏振光、第二波长的第二偏振光、第三波长的第二偏振光。The first polarization interference filter 2571 can convert the polarization direction of the light of the first wavelength, for example, can convert the second polarization of the first wavelength into the first polarization of the first wavelength. The polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light. The first polarization interference filter 2571 may not change the polarization direction of light having a wavelength other than the first wavelength. For example, the first polarization interference filter 2571 does not change the polarization directions of the light of the second wavelength and the light of the third wavelength. The light from the second light processor 2510 may pass through the first polarization interference filter 2571 to reach the second polarization beam splitter 2522. The light emitted from the first polarization interference filter 2571 may include the first polarized light of the first wavelength, the second polarized light of the second wavelength, and the second polarized light of the third wavelength.
第二偏振分光器2522可以反射第一偏振光，并透射第二偏振光。来自第一偏振干涉滤光片2571的该第一波长的第一偏振光可以经第二偏振分光器2522反射至第一波片2561。来自第一偏振干涉滤光片2571的该第二波长的第二偏振光以及该第三波长的第二偏振光可以透射第二偏振分光器2522，并入射至第二偏振干涉滤光片2572。The second polarization beam splitter 2522 may reflect the first polarized light and transmit the second polarized light. The first polarized light of the first wavelength from the first polarization interference filter 2571 may be reflected to the first wave plate 2561 through the second polarization beam splitter 2522. The second polarized light of the second wavelength and the second polarized light of the third wavelength from the first polarization interference filter 2571 may transmit the second polarization beam splitter 2522 and be incident on the second polarization interference filter 2572.
第一波片2561可以将第一偏振光转换为第二偏振光，还可以将第二偏振光转换为第一偏振光。第一波片2561可以将来自第二偏振分光器2522的第一波长的第一偏振光转换为第一波长的第二偏振光。第一波片2561射出的第一波长的第二偏振光可以入射至第一偏振分光器2521。The first wave plate 2561 can convert the first polarized light into the second polarized light, and can also convert the second polarized light into the first polarized light. The first wave plate 2561 can convert the first polarized light of the first wavelength from the second polarization beam splitter 2522 into the second polarized light of the first wavelength. The second polarized light of the first wavelength emitted by the first wave plate 2561 may be incident on the first polarization beam splitter 2521.
第一偏振分光器2521可以反射第一偏振光，并透射第二偏振光。来自第一偏振分光器2521的该第一波长的第二偏振光可以透射第一偏振分光器2521，并垂直射入第一光阀2531。The first polarization beam splitter 2521 may reflect the first polarized light and transmit the second polarized light. The second polarized light of the first wavelength from the first polarization beam splitter 2521 can transmit through the first polarization beam splitter 2521 and enter the first light valve 2531 perpendicularly.
第一光阀2531可以采集入射的第一波长的第二偏振光，将入射的第一波长的第二偏振光转变为第一波长的第一偏振光，并射出该第一波长的第一偏振光。根据光的可逆性，第一光阀2531垂直射出的第一波长的第一偏振光可以经第一偏振分光器2521反射至第四偏振干涉滤光片2574。The first light valve 2531 can collect the incident second polarized light of the first wavelength, convert the incident second polarized light of the first wavelength into the first polarized light of the first wavelength, and emit the first polarized light of the first wavelength. Light. According to the reversibility of light, the first polarized light of the first wavelength emitted vertically from the first light valve 2531 may be reflected by the first polarization beam splitter 2521 to the fourth polarization interference filter 2574.
第四偏振干涉滤光片2574可以改变第一波长的光的偏振方向，例如将第一波长的第 一偏振光转换为第一波长的第二偏振光。第四偏振干涉滤光片2574可以不改变不是第一波长的光的偏振方向。例如，第四偏振干涉滤光片2574不改变红外光的偏振方向。来自第一偏振分光器2521的光可以穿过第四偏振干涉滤光片2574，并入射至第四偏振分光器2524，第四偏振干涉滤光片2574射出光可以包括第一波长的第二偏振光。The fourth polarization interference filter 2574 can change the polarization direction of the light of the first wavelength, for example, convert the first polarized light of the first wavelength into the second polarized light of the first wavelength. The fourth polarization interference filter 2574 may not change the polarization direction of light having a wavelength other than the first wavelength. For example, the fourth polarization interference filter 2574 does not change the polarization direction of infrared light. The light from the first polarization beam splitter 2521 may pass through the fourth polarization interference filter 2574 and be incident to the fourth polarization beam splitter 2524. The light emitted by the fourth polarization interference filter 2574 may include the second polarization of the first wavelength. Light.
第二偏振干涉滤光片2572可以转换第二波长的光的偏振方向，例如可以将第二波长的第二偏振光转换为第二波长的第一偏振光。第二偏振干涉滤光片2572可以不改变不是第二波长的光的偏振方向。例如，第二偏振干涉滤光片2572不改变第三波长的光的偏振方向。来自第二偏振分光器2522的光可以穿过第二偏振干涉滤光片2572，并入射至第三偏振分光器2523，第二偏振干涉滤光片2572射出光可以包括第二波长的第一偏振光、第三波长的第二偏振光。The second polarization interference filter 2572 can convert the polarization direction of the light of the second wavelength, for example, can convert the second polarization of the second wavelength into the first polarization of the second wavelength. The second polarization interference filter 2572 may not change the polarization direction of the light of the second wavelength. For example, the second polarization interference filter 2572 does not change the polarization direction of the light of the third wavelength. The light from the second polarization beam splitter 2522 may pass through the second polarization interference filter 2572 and be incident to the third polarization beam splitter 2523. The light emitted by the second polarization interference filter 2572 may include the first polarization of the second wavelength. Light, second polarized light of the third wavelength.
第三偏振分光器2523可以反射第一偏振光，并透射第二偏振光。来自第二偏振干涉滤光片2572的第二波长的第一偏振光可以经第二偏振分光器2522反射，并垂直射入第二光阀2532。来自第二偏振干涉滤光片2572的第三波长的第二偏振光可以透射第三偏振分光器2523，并垂直射入第三光阀2533。The third polarization beam splitter 2523 may reflect the first polarized light and transmit the second polarized light. The first polarized light of the second wavelength from the second polarization interference filter 2572 may be reflected by the second polarization beam splitter 2522 and enter the second light valve 2532 perpendicularly. The second polarized light of the third wavelength from the second polarization interference filter 2572 can pass through the third polarization beam splitter 2523 and enter the third light valve 2533 perpendicularly.
第二光阀2532可以采集入射的第二波长的第一偏振光，将该第二波长的第一偏振光转换为第二波长的第二偏振光，并垂直射出该第二波长的第二偏振光。根据光的可逆性，第二光阀2532射出的第二波长的第二偏振光可以透射第二偏振分光器2522，并入射至第三偏振干涉滤光片2573。The second light valve 2532 can collect the incident first polarized light of the second wavelength, convert the first polarized light of the second wavelength into the second polarized light of the second wavelength, and emit the second polarized light of the second wavelength vertically. Light. According to the reversibility of light, the second polarized light of the second wavelength emitted by the second light valve 2532 can pass through the second polarization beam splitter 2522 and be incident on the third polarization interference filter 2573.
第三光阀2533可以采集入射的第三波长的第二偏振光，将该第三波长的第二偏振光转换为第三波长的第一偏振光，并垂直射出该第三波长的第一偏振光。根据光的可逆性，第三光阀2533射出的第三波长的第一偏振光可以经第三偏振分光器2523反射至第三偏振干涉滤光片2573。The third light valve 2533 can collect the incident second polarized light of the third wavelength, convert the second polarized light of the third wavelength into the first polarized light of the third wavelength, and emit the first polarized light of the third wavelength vertically. Light. According to the reversibility of light, the first polarized light of the third wavelength emitted by the third light valve 2533 may be reflected by the third polarization beam splitter 2523 to the third polarization interference filter 2573.
第三偏振干涉滤光片2573可以转换第二波长的光的偏振方向，例如可以将第二波长的第二偏振光转换为第二波长的第一偏振光。第三偏振干涉滤光片2573可以不改变不是第二波长的光的偏振方向。例如，第三偏振干涉滤光片2573可以不改变第三波长的光的偏振方向。来自第三偏振分光器2523的第二波长的第二偏振光以及第三波长的第一偏振光可以穿过第三偏振干涉滤光片2573，并入射至第四偏振分光器2524，第三偏振干涉滤光片2573射出的光可以包括第二波长的第一偏振光、第三波长的第一偏振光。The third polarization interference filter 2573 can convert the polarization direction of the light of the second wavelength, for example, can convert the second polarized light of the second wavelength into the first polarized light of the second wavelength. The third polarization interference filter 2573 may not change the polarization direction of the light of the second wavelength. For example, the third polarization interference filter 2573 may not change the polarization direction of the light of the third wavelength. The second polarized light of the second wavelength and the first polarized light of the third wavelength from the third polarization beam splitter 2523 can pass through the third polarization interference filter 2573 and be incident on the fourth polarization beam splitter 2524. The light emitted by the interference filter 2573 may include the first polarized light of the second wavelength and the first polarized light of the third wavelength.
第四偏振分光器2524可以汇合来自第一光阀2531、第二光阀2532、第三光阀2533的光。其中，第四偏振分光器2524可以反射第一偏振光，并透射第二偏振光。来自第四偏振干涉滤光片2574的第一波长的第二偏振光可以透射第四偏振分光器2524，并沿目标方向射出第四偏振分光器2524。来自第三偏振干涉滤光片2573的第二波长的第一偏振光、第三波长的第一偏振光可以经第四偏振分光器2524反射，并沿该目标方向射出第四偏振分光器2524。因此，射出第四偏振分光器2524的第一波长的光、第二波长的光、第三波长的光相互平行。The fourth polarization beam splitter 2524 can converge the light from the first light valve 2531, the second light valve 2532, and the third light valve 2533. Wherein, the fourth polarization beam splitter 2524 can reflect the first polarized light and transmit the second polarized light. The second polarized light of the first wavelength from the fourth polarization interference filter 2574 can pass through the fourth polarization beam splitter 2524 and exit the fourth polarization beam splitter 2524 in the target direction. The first polarized light of the second wavelength and the first polarized light of the third wavelength from the third polarization interference filter 2573 may be reflected by the fourth polarization beam splitter 2524 and exit the fourth polarization beam splitter 2524 along the target direction. Therefore, the light of the first wavelength, the light of the second wavelength, and the light of the third wavelength emitted from the fourth polarization beam splitter 2524 are parallel to each other.
经第四偏振分光器2524汇合的光可以入射至第二红外偏振转换器2560。第二红外偏振转换器2560可以转换红外光的偏振方向，而第四偏振分光器2524射出的光主要是可见光。因此来自第四偏振分光器2524光可以穿过第二红外偏振转换器2560，并入射至成像透镜2550。The light converged by the fourth polarization beam splitter 2524 may be incident on the second infrared polarization converter 2560. The second infrared polarization converter 2560 can convert the polarization direction of infrared light, and the light emitted by the fourth polarization beam splitter 2524 is mainly visible light. Therefore, the light from the fourth polarization beam splitter 2524 can pass through the second infrared polarization converter 2560 and be incident on the imaging lens 2550.
成像透镜2550可以将投影图像成像在投影区域2502内。入射至成像透镜2550的光包括第一光阀2531、第二光阀2532以及第三光阀2533射出的光，因此第一光阀2531、第二光阀2532、第三光阀2533均与投影区域2502满足物像共轭关系。第一光阀2531、第二光阀2532、第三光阀2533中的一个或多个可以采集在投影区域2502内的投影图像。The imaging lens 2550 can image the projected image in the projection area 2502. The light incident on the imaging lens 2550 includes the light emitted by the first light valve 2531, the second light valve 2532, and the third light valve 2533. Therefore, the first light valve 2531, the second light valve 2532, and the third light valve 2533 are all connected to the projection The area 2502 satisfies the object-image conjugate relationship. One or more of the first light valve 2531, the second light valve 2532, and the third light valve 2533 may collect a projection image in the projection area 2502.
可以通过射入投影设备2501的红外光，确定用户在投影图像上所指示的位置2503，进而实现用户与投影设备2501之间的交互。用户在投影图像上所指示的位置2503可以在成像透镜2550远离投影区域2502的一侧形成实像。射入投影设备2501的红外光可以穿过成像透镜2550到达第二红外偏振转换器2560。The position 2503 indicated by the user on the projected image can be determined by the infrared light incident on the projection device 2501, and the interaction between the user and the projection device 2501 can be realized. The position 2503 indicated by the user on the projection image may form a real image on the side of the imaging lens 2550 away from the projection area 2502. The infrared light incident on the projection device 2501 may pass through the imaging lens 2550 to reach the second infrared polarization converter 2560.
第二红外偏振转换器2560可以将穿过第二红外偏振转换器2560的红外关系转换为第二偏振红外光，该第二偏振红外光属于第二偏振光。第二红外偏振转换器2560射出的红外光可以沿该目标方向入射至第四偏振分光器2524。第二红外偏振转换器2560射出的红外光可以透射第四偏振分光器2524，并入射至第三偏振干涉滤光片2573。因此，射出第四偏振分光器2524的第一波长的光、第二波长的光、第三波长的光以及射入第四偏振分光器2524的的红外光相互平行。The second infrared polarization converter 2560 can convert the infrared relationship passing through the second infrared polarization converter 2560 into the second polarized infrared light, and the second polarized infrared light belongs to the second polarized light. The infrared light emitted by the second infrared polarization converter 2560 may be incident on the fourth polarization beam splitter 2524 along the target direction. The infrared light emitted by the second infrared polarization converter 2560 may pass through the fourth polarization beam splitter 2524 and be incident on the third polarization interference filter 2573. Therefore, the light of the first wavelength, the light of the second wavelength, the light of the third wavelength emitted from the fourth polarization beam splitter 2524, and the infrared light that enters the fourth polarization beam splitter 2524 are parallel to each other.
第三偏振干涉滤光片2573不会转换红外光的偏振方向，因此该第三偏振干涉滤光片2573射出的第二偏振红外光可以透射第一偏振分光器2525，并入射至图像传感器2540。图像传感器2540可以采集来自第一偏振分光器2521的红外光。The third polarization interference filter 2573 does not convert the polarization direction of the infrared light, so the second polarization infrared light emitted by the third polarization interference filter 2573 can pass through the first polarization beam splitter 2525 and be incident on the image sensor 2540. The image sensor 2540 can collect infrared light from the first polarization beam splitter 2521.
由于投影区域2502与图像传感器2540满足物像共轭关系，因此可以通过图像传感器2540采集红外光，以确定用户在投影图像上所指示的位置2503。因此，图像处理器(图25未示出)可以根据图像传感器采集到的采集结果以及光阀采集到的采集结果，确定用户在投影图像上的指示位置。Since the projection area 2502 and the image sensor 2540 satisfy the object-image conjugate relationship, infrared light can be collected by the image sensor 2540 to determine the position 2503 indicated by the user on the projected image. Therefore, the image processor (not shown in FIG. 25) can determine the user's indicated position on the projection image according to the collection result collected by the image sensor and the collection result collected by the light valve.
综上所述，本申请实施例提供的投影设备可以借助采集的红外光来感知用户在投影区域内的操作。In summary, the projection device provided by the embodiment of the present application can perceive the user's operation in the projection area by using the collected infrared light.
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims (23)

  1. 一种投影设备，其特征在于，包括：第一光处理器、成像透镜、第一偏振分光器、第一偏振分光器、第一光阀、图像传感器、图像处理器；其中，A projection device, characterized by comprising: a first light processor, an imaging lens, a first polarization beam splitter, a first polarization beam splitter, a first light valve, an image sensor, and an image processor; wherein,
    所述第一光处理器射出包括投影图像的图像信息的第一偏振可见光；The first light processor emits first polarized visible light including image information of the projected image;
    所述第一偏振分光器的第一侧反射来自所述第一光处理器的第一偏振可见光，所述经所述第一侧反射的第一偏振可见光垂直射入所述第一光阀；The first side of the first polarization beam splitter reflects the first polarized visible light from the first light processor, and the first polarized visible light reflected by the first side is incident perpendicular to the first light valve;
    所述第一光阀采集经所述第一侧反射的第一偏振可见光，所述第一光阀将入射的第一偏振可见光转换为第二偏振可见光，所述第一光阀垂直射出经所述第一光阀转换得到的第二偏振可见光，所述第一光阀射出的第二偏振可见光透射所述第一偏振分光器，所述第一偏振可见光的偏振方向垂直于所述第二偏振可见光的偏振方向；The first light valve collects the first polarized visible light reflected by the first side, the first light valve converts the incident first polarized visible light into the second polarized visible light, and the first light valve emits vertically through the The second polarized visible light converted by the first light valve, the second polarized visible light emitted by the first light valve is transmitted through the first polarization beam splitter, and the polarization direction of the first polarized visible light is perpendicular to the second polarization The polarization direction of visible light;
    透射所述第一偏振分光器的光穿过所述成像透镜并射出所述投影设备，射出所述投影设备的光在投影区域内形成所述投影图像，用户在所述投影区域内作用的红外光射入所述投影设备并穿过所述成像透镜；The light transmitted through the first polarizing beam splitter passes through the imaging lens and exits the projection device, the light exiting the projection device forms the projection image in the projection area, and the infrared light that the user acts in the projection area Light enters the projection device and passes through the imaging lens;
    来自所述成像透镜的红外光经所述第一偏振分光器的第二侧反射至所述图像处理器，所述图像传感器采集来自所述第一偏振分光器的红外光，所述透射所述第一偏振分光器的第二偏振可见光与射入所述第一偏振分光器的红外光相互平行；The infrared light from the imaging lens is reflected to the image processor via the second side of the first polarization beam splitter, the image sensor collects the infrared light from the first polarization beam splitter, and the transmission of the infrared light The second polarized visible light of the first polarization beam splitter and the infrared light incident on the first polarization beam splitter are parallel to each other;
    所述图像处理器根据所述第一光阀的采集结果及所述图像传感器的采集结果，确定所述用户在所述投影图像上的指示位置。The image processor determines the indicated position of the user on the projection image according to the collection result of the first light valve and the collection result of the image sensor.
  2. 根据权利要求1所述的投影设备，其特征在于，所述第一偏振分光器包括用于反射红外光的红外反射层。The projection device according to claim 1, wherein the first polarization beam splitter comprises an infrared reflective layer for reflecting infrared light.
  3. 根据权利要求1或2所述的投影设备，其特征在于，所述红外反射层位于所述第二侧。The projection device according to claim 1 or 2, wherein the infrared reflective layer is located on the second side.
  4. 根据权利要求1所述的投影设备，其特征在于，所述第一偏振分光器用于反射第一偏振光，并用于透射第二偏振光，所述第一偏振光包括所述第一偏振可见光，所述第二偏振光包括所述第二偏振可见光，所述第一偏振光的偏振方向垂直于所述第二偏振光的偏振方向；The projection device according to claim 1, wherein the first polarization beam splitter is used to reflect the first polarized light and to transmit the second polarized light, and the first polarized light includes the first polarized visible light, The second polarized light includes the second polarized visible light, and the polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light;
    所述投影设备还包括：第一红外偏振转换器；其中，The projection device further includes: a first infrared polarization converter; wherein,
    所述第一红外偏振转换器将所述来自所述成像透镜的红外光转换为第一偏振红外光，所述来自所述成像透镜的红外光穿过所述第一红外偏振转换器并入射至所述第一偏振分光器的第二侧，所述第一偏振红外光属于所述第一偏振光。The first infrared polarization converter converts the infrared light from the imaging lens into first polarized infrared light, and the infrared light from the imaging lens passes through the first infrared polarization converter and is incident on On the second side of the first polarization beam splitter, the first polarized infrared light belongs to the first polarized light.
  5. 根据权利要求1至4中任一项所述的投影设备，其特征在于，The projection device according to any one of claims 1 to 4, wherein:
    所述第一光处理器射出包括所述图像信息的光，所述第一光处理器射出的光包括第一波长的第一偏振光、第二波长的第一偏振光、第三波长的第一偏振光，所述第一偏振可见光为所述第一波长的第一偏振光；The first optical processor emits light including the image information, and the light emitted by the first optical processor includes a first polarized light of a first wavelength, a first polarized light of a second wavelength, and a first polarized light of a third wavelength. A polarized light, the first polarized visible light is the first polarized light of the first wavelength;
    所述第一光阀射出的所述第二偏振可见光为所述第一波长的第二偏振光，所述第一偏振光的偏振方向垂直于所述第二偏振光的偏振方向；The second polarized visible light emitted by the first light valve is the second polarized light of the first wavelength, and the polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light;
    所述投影设备还包括：第二偏振分光器、第三偏振分光器、第二光阀、第三光阀、合 光器；其中，The projection device further includes: a second polarization beam splitter, a third polarization beam splitter, a second light valve, a third light valve, and a light combiner; wherein,
    所述第二偏振分光器反射来自所述第一光处理器的所述第二波长的第一偏振光，经所述第二偏振分光器反射的所述第二波长的第一偏振光垂直射入所述第二光阀；The second polarizing beam splitter reflects the first polarized light of the second wavelength from the first optical processor, and the first polarized light of the second wavelength reflected by the second polarizing beam splitter is emitted perpendicularly Into the second light valve;
    所述第二光阀采集经所述第二偏振分光器反射的所述第二波长的第一偏振光，所述第二光阀将入射的所述第二波长的第一偏振光转换为所述第二波长的第二偏振光，所述第二光阀垂直射出经所述第二光阀转换得到的所述第二波长的第二偏振光，所述第二光阀射出的所述第二波长的第二偏振光透射所述第二偏振分光器；The second light valve collects the first polarized light of the second wavelength reflected by the second polarization beam splitter, and the second light valve converts the incident first polarized light of the second wavelength into all The second polarized light of the second wavelength, the second light valve vertically emits the second polarized light of the second wavelength converted by the second light valve, and the first light emitted by the second light valve Two-wavelength second polarized light transmits the second polarization beam splitter;
    所述第三偏振分光器反射来自所述第一光处理器的所述第三波长的第一偏振光，经所述第三偏振分光器反射的所述第三波长的第一偏振光垂直射入所述第三光阀；The third polarizing beam splitter reflects the first polarized light of the third wavelength from the first optical processor, and the first polarized light of the third wavelength reflected by the third polarizing beam splitter emits vertically Into the third light valve;
    所述第三光阀采集经所述第三偏振分光器反射的所述第三波长的第一偏振光，所述第三光阀将入射的所述第三波长的第一偏振光转换为所述第三波长的第二偏振光，所述第三光阀垂直射出经所述第三光阀转换得到的所述第三波长的第二偏振光，所述第三光阀射出的所述第三波长的第二偏振光透射所述第三偏振分光器；The third light valve collects the first polarized light of the third wavelength reflected by the third polarization beam splitter, and the third light valve converts the incident first polarized light of the third wavelength into all The second polarized light of the third wavelength, the third light valve vertically emits the second polarized light of the third wavelength converted by the third light valve, and the first light emitted by the third light valve Three-wavelength second polarized light transmits the third polarization beam splitter;
    所述合光器汇合来自所述第一光阀的所述第一波长的光、来自所述第二光阀的所述第二波长的光、来自所述第三光阀的所述第三波长的光，经所述合光器汇合的光沿目标方向射出所述合光器，所述经所述合光器汇合的光入射至所述成像透镜，所述来自所述成像透镜的红外光沿所述目标方向的相反方向入射至所述合光器，所述第一波长的光包括所述第一波长的第一偏振光和/或所述第一波长的第二偏振光，所述第二波长的光包括所述第二波长的第一偏振光和/或所述第二波长的第二偏振光，所述第三波长的光包括所述第三波长的第一偏振光和/所述或第三波长的第二偏振光；The light combiner combines the light of the first wavelength from the first light valve, the light of the second wavelength from the second light valve, and the third light from the third light valve. The light of the wavelength, the light combined by the light combiner exits the light combiner along the target direction, the light combined by the light combiner enters the imaging lens, and the infrared light from the imaging lens The light is incident on the light combiner in a direction opposite to the target direction, the light of the first wavelength includes the first polarized light of the first wavelength and/or the second polarized light of the first wavelength, so The light of the second wavelength includes the first polarized light of the second wavelength and/or the second polarized light of the second wavelength, and the light of the third wavelength includes the first polarized light of the third wavelength and / The second polarized light of the or third wavelength;
    所述合光器包括：垂直且相交的第一反射层、第二反射层，所述第二反射层将所述第一反射层划分为面积相同的两个部分，所述第一反射层将所述第二反射层划分为面积相同的两个部分；其中，The light combiner includes: a first reflective layer and a second reflective layer that are perpendicular and intersecting. The second reflective layer divides the first reflective layer into two parts with the same area. The second reflective layer is divided into two parts with the same area; wherein,
    所述第一反射层反射所述来自所述第一光阀的所述第一波长的光以及来自所述成像透镜的红外光，所述第一反射层透射来自所述第二光阀的所述第二波长的光以及所述来自所述第三光阀的所述第三波长的光，所述来自所述第一光阀的所述第一波长的光沿所述目标方向自所述第一反射层射出，所述来自所述成像透镜的红外光沿所述目标方向的相反方向入射至所述第一反射层；The first reflective layer reflects the light of the first wavelength from the first light valve and the infrared light from the imaging lens, and the first reflective layer transmits all the light from the second light valve. The light of the second wavelength and the light of the third wavelength from the third light valve, the light of the first wavelength from the first light valve from the target direction The first reflective layer emits, and the infrared light from the imaging lens is incident on the first reflective layer in a direction opposite to the target direction;
    所述第二反射层反射所述来自所述第二光阀的所述第二波长的光，所述第二反射层透射所述来自所述第一光阀的所述第一波长的光、所述来自所述第三光阀的所述第三波长的光以及所述来自成像透镜的红外光。The second reflective layer reflects the light of the second wavelength from the second light valve, and the second reflective layer transmits the light of the first wavelength from the first light valve, The light of the third wavelength from the third light valve and the infrared light from the imaging lens.
  6. 根据权利要求5所述的投影设备，其特征在于，所述投影设备还包括：第一偏振干涉滤光片；其中，所述第一偏振干涉滤光片用于将所述第一波长的第二偏振光转换为所述第一波长的第一偏振光，来自所述第一偏振分光器的光穿过所述第一偏振干涉滤光片入射至所述合光器。5. The projection device according to claim 5, wherein the projection device further comprises: a first polarization interference filter; wherein the first polarization interference filter is used to reduce the first wavelength of the first wavelength The second polarization light is converted into the first polarization light of the first wavelength, and the light from the first polarization beam splitter passes through the first polarization interference filter and enters the light combiner.
  7. 根据权利要求5或6所述的投影设备，其特征在于，所述第一反射层包括用于反射红外光的红外反射层。The projection device according to claim 5 or 6, wherein the first reflective layer comprises an infrared reflective layer for reflecting infrared light.
  8. 根据权利要求1至4中任一项所述的投影设备，其特征在于，The projection device according to any one of claims 1 to 4, wherein:
    所述第一光处理器射出包括所述图像信息的光，所述第一光处理器射出的光包括第一 波长的第一偏振光、第二波长的第一偏振光、第三波长的第一偏振光，所述第一偏振可见光为所述第一波长的第一偏振光；The first optical processor emits light including the image information, and the light emitted by the first optical processor includes a first polarized light of a first wavelength, a first polarized light of a second wavelength, and a first polarized light of a third wavelength. A polarized light, the first polarized visible light is the first polarized light of the first wavelength;
    所述第一光阀射出的所述第二偏振可见光为所述第一波长的第二偏振光，所述第一偏振光的偏振方向垂直于所述第二偏振光的偏振方向；The second polarized visible light emitted by the first light valve is the second polarized light of the first wavelength, and the polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light;
    所述投影设备还包括：第二偏振分光器、第三偏振分光器、第二光阀、第三光阀、合光器；其中，The projection device further includes: a second polarization beam splitter, a third polarization beam splitter, a second light valve, a third light valve, and a light combiner; wherein,
    所述第二偏振分光器反射来自所述第一光处理器的所述第二波长的第一偏振光，经所述第二偏振分光器反射的所述第二波长的第一偏振光垂直射入所述第二光阀；The second polarizing beam splitter reflects the first polarized light of the second wavelength from the first optical processor, and the first polarized light of the second wavelength reflected by the second polarizing beam splitter is emitted perpendicularly Into the second light valve;
    所述第二光阀采集经所述第二偏振分光器反射的所述第二波长的第一偏振光，所述第二光阀将入射的所述第二波长的第一偏振光转换为所述第二波长的第二偏振光，所述第二光阀垂直射出经所述第二光阀转换得到的所述第二波长的第二偏振光，所述第二光阀射出的所述第二波长的第二偏振光透射所述第二偏振分光器；The second light valve collects the first polarized light of the second wavelength reflected by the second polarization beam splitter, and the second light valve converts the incident first polarized light of the second wavelength into all The second polarized light of the second wavelength, the second light valve vertically emits the second polarized light of the second wavelength converted by the second light valve, and the first light emitted by the second light valve Two-wavelength second polarized light transmits the second polarization beam splitter;
    所述第三偏振分光器反射来自所述第一光处理器的所述第三波长的第一偏振光，经所述第三偏振分光器反射的所述第三波长的第一偏振光垂直射入所述第三光阀；The third polarizing beam splitter reflects the first polarized light of the third wavelength from the first optical processor, and the first polarized light of the third wavelength reflected by the third polarizing beam splitter emits vertically Into the third light valve;
    所述第三光阀采集经所述第三偏振分光器反射的所述第三波长的第一偏振光，所述第三光阀将入射的所述第三波长的第一偏振光转换为所述第三波长的第二偏振光，所述第三光阀垂直射出经所述第三光阀转换得到的所述第三波长的第二偏振光，所述第三光阀射出的所述第三波长的第二偏振光透射所述第三偏振分光器；The third light valve collects the first polarized light of the third wavelength reflected by the third polarization beam splitter, and the third light valve converts the incident first polarized light of the third wavelength into all The second polarized light of the third wavelength, the third light valve vertically emits the second polarized light of the third wavelength converted by the third light valve, and the first light emitted by the third light valve Three-wavelength second polarized light transmits the third polarization beam splitter;
    所述合光器汇合来自所述第一光阀的所述第一波长的光、来自所述第二光阀的所述第二波长的光、来自所述第三光阀的所述第三波长的光，经所述合光器汇合的光沿目标方向射出所述合光器，所述经所述合光器汇合的光入射至所述成像透镜，所述来自所述成像透镜的红外光沿所述目标方向的相反方向入射至所述合光器，所述第一波长的光包括所述第一波长的第一偏振光和/或所述第一波长的第二偏振光，所述第二波长的光包括所述第二波长的第一偏振光和/或所述第二波长的第二偏振光，所述第三波长的光包括所述第三波长的第一偏振光和/所述或第三波长的第二偏振光；所述合光器包括：The light combiner combines the light of the first wavelength from the first light valve, the light of the second wavelength from the second light valve, and the third light from the third light valve. The light of the wavelength, the light combined by the light combiner exits the light combiner along the target direction, the light combined by the light combiner enters the imaging lens, and the infrared light from the imaging lens The light is incident on the light combiner in a direction opposite to the target direction, the light of the first wavelength includes the first polarized light of the first wavelength and/or the second polarized light of the first wavelength, so The light of the second wavelength includes the first polarized light of the second wavelength and/or the second polarized light of the second wavelength, and the light of the third wavelength includes the first polarized light of the third wavelength and / The second polarized light of the or third wavelength; the light combiner includes:
    垂直且相交的第三反射层以及第四反射层，所述第四反射层将所述第三反射层划分为面积相同的两个部分，所述第三反射层将所述第四反射层划分为面积相同的两个部分，其中，Vertical and intersecting third and fourth reflective layers, the fourth reflective layer divides the third reflective layer into two parts with the same area, and the third reflective layer divides the fourth reflective layer Are two parts with the same area, where
    所述第三反射层透射所述来自所述第一光阀的所述第一波长的光、所述来自所述第二光阀的所述第二波长的光以及所述来自所述成像透镜的红外光，所述第三反射层反射所述来自所述第三光阀的所述第三波长的光，The third reflective layer transmits the light of the first wavelength from the first light valve, the light of the second wavelength from the second light valve, and the light from the imaging lens The third reflection layer reflects the light of the third wavelength from the third light valve,
    所述第四反射层透射所述来自所述第一光阀的所述第一波长的光、所述来自所述第三光阀的所述第三波长的光以及所述来自所述成像透镜的红外光，所述第四反射层反射所述来自所述第二光阀的所述第二波长的光。The fourth reflective layer transmits the light of the first wavelength from the first light valve, the light of the third wavelength from the third light valve, and the light from the imaging lens The fourth reflective layer reflects the light of the second wavelength from the second light valve.
  9. 根据权利要求2或3所述的投影设备，其特征在于，The projection device according to claim 2 or 3, wherein:
    所述第一光处理器射出包括所述图像信息的光，所述第一光处理器射出的光包括第一波长的第一偏振光、第二波长的第一偏振光以及第三波长的第一偏振光，所述第一偏振可见光为所述第一波长的第一偏振光；The first optical processor emits light including the image information, and the light emitted by the first optical processor includes a first polarized light of a first wavelength, a first polarized light of a second wavelength, and a first polarized light of a third wavelength. A polarized light, the first polarized visible light is the first polarized light of the first wavelength;
    所述第一光阀射出的所述第二偏振可见光为所述第一波长的第二偏振光，所述第一偏 振光的偏振方向垂直于所述第二偏振光的偏振方向；The second polarized visible light emitted by the first light valve is the second polarized light of the first wavelength, and the polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light;
    所述投影设备还包括：第一偏振干涉滤光片、第二偏振分光器、第一波片、第二波片、第二偏振干涉滤光片、第三偏振分光器、第二光阀、第三光阀、第三偏振干涉滤光片、第四偏振分光器；其中，The projection device also includes: a first polarization interference filter, a second polarization beam splitter, a first wave plate, a second wave plate, a second polarization interference filter, a third polarization beam splitter, a second light valve, The third light valve, the third polarization interference filter, and the fourth polarization beam splitter; among them,
    所述第一光处理器射出的光穿过所述第一偏振干涉滤光片入射至所述第二偏振分光器，所述第一偏振干涉滤光片将入射的所述第一波长的第一偏振光转换为所述第一波长的第二偏振光；The light emitted by the first optical processor passes through the first polarization interference filter and enters the second polarization beam splitter, and the first polarization interference filter transmits the incident wavelength of the first wavelength A polarized light is converted into a second polarized light of the first wavelength;
    所述第二偏振分光器透射来自所述第一偏振干涉滤光片的所述第一波长的第二偏振光，所述第二偏振分光器反射来自所述第一偏振干涉滤光片的所述第二波长的第一偏振光、所述第三波长的第一偏振光，透射所述第二偏振分光器的所述第一波长的第二偏振光入射至所述第一波片，经所述第二偏振分光器反射的所述第二波长的第一偏振光、所述第三波长的第一偏振光入射至所述第二偏振干涉滤光片；The second polarization beam splitter transmits the second polarized light of the first wavelength from the first polarization interference filter, and the second polarization beam splitter reflects all the light from the first polarization interference filter. The first polarized light of the second wavelength, the first polarized light of the third wavelength, the second polarized light of the first wavelength transmitted through the second polarizing beam splitter is incident on the first wave plate, and The first polarized light of the second wavelength and the first polarized light of the third wavelength reflected by the second polarization beam splitter are incident on the second polarization interference filter;
    所述第一波片将来自所述第二偏振分光器的所述第一波长的第二偏振光转换为所述第一波长的第一偏振光，所述第一波片射出经所述第一波片转换得到的所述第一波长的第一偏振光，所述第一波片射出的所述第一波长的第一偏振光经所述第一侧反射至所述第一光阀；The first wave plate converts the second polarized light of the first wavelength from the second polarization beam splitter into the first polarized light of the first wavelength, and the first wave plate emits through the first polarized light The first polarized light of the first wavelength converted by a wave plate, and the first polarized light of the first wavelength emitted by the first wave plate is reflected to the first light valve through the first side;
    所述第二波片将透射所述第一偏振分光器的所述第一波长的第二偏振光转换为所述第一波长的第一偏振光，所述第二波片射出经所述第二波片转换得到的所述第一波长的第一偏振光，所述第二波片射出的所述第一波长的第一偏振光入射至所述第四偏振分光器；The second wave plate converts the second polarized light of the first wavelength transmitted through the first polarization beam splitter into the first polarized light of the first wavelength, and the second wave plate emits the light through the first polarized light. The first polarized light of the first wavelength converted by two wave plates, and the first polarized light of the first wavelength emitted by the second wave plate is incident on the fourth polarization beam splitter;
    来自所述第二偏振分光器的所述第二波长的光、所述第三波长的光穿过所述第二偏振干涉滤光片入射至所述第三偏振分光器，所述第二偏振干涉滤光片将入射的所述第二波长的第一偏振光转换为所述第二波长的第二偏振光；The light of the second wavelength and the light of the third wavelength from the second polarization beam splitter pass through the second polarization interference filter and enter the third polarization beam splitter. The interference filter converts the incident first polarized light of the second wavelength into the second polarized light of the second wavelength;
    所述第三偏振分光器透射来自所述第二偏振干涉滤光片的所述第二波长的第二偏振光，所述第三偏振分光器反射来自所述第二偏振干涉滤光片的所述第三波长的第一偏振光，透射所述第三偏振分光器的所述第二波长的第二偏振光垂直射入所述第二光阀，经所述第三偏振分光器反射的所述第三波长的第一偏振光垂直射入所述第三光阀；The third polarization beam splitter transmits the second polarized light of the second wavelength from the second polarization interference filter, and the third polarization beam splitter reflects all the light from the second polarization interference filter. The first polarized light of the third wavelength, the second polarized light of the second wavelength transmitted through the third polarization beam splitter and vertically enter the second light valve, and all the light reflected by the third polarization beam splitter The first polarized light of the third wavelength is vertically incident into the third light valve;
    所述第二光阀采集透射所述第三偏振分光器的所述第二波长的第二偏振光，所述第二光阀将入射的所述第二波长的第二偏振光转换为所述第二波长的第一偏振光，所述第二光阀垂直射出经所述第二光阀转换得到的所述第二波长的第一偏振光，所述第二光阀射出的所述第二波长的第一偏振光经所述第三偏振分光器反射至所述第三偏振干涉滤光片；The second light valve collects the second polarized light of the second wavelength that transmits the third polarization beam splitter, and the second light valve converts the incident second polarized light of the second wavelength into the The first polarized light of the second wavelength, the second light valve vertically emits the first polarized light of the second wavelength converted by the second light valve, and the second light valve emits the second polarized light The first polarized light of the wavelength is reflected by the third polarization beam splitter to the third polarization interference filter;
    所述第三光阀采集经所述第三偏振分光器反射的所述第三波长的第一偏振光，所述第三光阀将入射的所述第三波长的第一偏振光转换为所述第三波长的第二偏振光，所述第三光阀垂直射出经所述第三光阀转换得到的所述第三波长的第二偏振光，所述第三光阀射出的所述第三波长的第二偏振光透射所述第三偏振分光器，透射所述第三偏振分光器的第三波长的第二偏振光入射至所述第三偏振干涉滤光片；The third light valve collects the first polarized light of the third wavelength reflected by the third polarization beam splitter, and the third light valve converts the incident first polarized light of the third wavelength into all The second polarized light of the third wavelength, the third light valve vertically emits the second polarized light of the third wavelength converted by the third light valve, and the first light emitted by the third light valve The second polarized light of three wavelengths transmits the third polarization beam splitter, and the second polarized light of the third wavelength that transmits the third polarization beam splitter is incident on the third polarization interference filter;
    来自所述第三偏振分光器的所述第二波长的光、所述第三波长的光穿过所述第三偏振干涉滤光片入射至第四偏振分光器，所述第三偏振干涉滤光片将来自所述第三偏振分光器的所述第二波长的第一偏振光转换为所述第二波长的第二偏振光；The light of the second wavelength and the light of the third wavelength from the third polarization beam splitter pass through the third polarization interference filter and enter the fourth polarization beam splitter. The third polarization interference filter The optical plate converts the first polarized light of the second wavelength from the third polarization beam splitter into the second polarized light of the second wavelength;
    所述第四偏振分光器反射来自所述第二波片的所述第一波长的第一偏振光，所述第四 偏振分光器透射来自所述第三偏振干涉滤光片的所述第二波长的第二偏振光、所述第三波长的第二偏振光，经所述第四偏振分光器反射的所述第一波长的第一偏振光入射至所述成像透镜，透射所述第四偏振分光器的所述第二波长的第二偏振光、所述第三波长的第二偏振光入射至所述成像透镜，来自所述成像透镜的红外光经所述第四偏振分光器反射至所述第二侧，所述第四偏振分光器射出的所述第一波长的第一偏振光、所述第二波长的第二偏振光、所述第三波长的第二偏振光以及射入所述第四偏振分光器的红外光相互平行。The fourth polarizing beam splitter reflects the first polarized light of the first wavelength from the second wave plate, and the fourth polarizing beam splitter transmits the second polarized light from the third polarization interference filter. The second polarized light of the wavelength, the second polarized light of the third wavelength, the first polarized light of the first wavelength reflected by the fourth polarization beam splitter enters the imaging lens, and transmits the fourth polarized light. The second polarized light of the second wavelength and the second polarized light of the third wavelength of the polarization beam splitter are incident on the imaging lens, and the infrared light from the imaging lens is reflected to the imaging lens by the fourth polarization beam splitter. On the second side, the first polarized light of the first wavelength, the second polarized light of the second wavelength, the second polarized light of the third wavelength and the incident light emitted by the fourth polarization beam splitter The infrared light of the fourth polarization beam splitter is parallel to each other.
  10. 根据权利要求4所述的投影设备，其特征在于，The projection device according to claim 4, wherein:
    所述第一光处理器射出包括所述图像信息的光，所述第一光处理器射出的光包括第一波长的第一偏振光、第二波长的第一偏振光以及第三波长的第一偏振光，所述第一偏振可见光为所述第一波长的第一偏振光；The first optical processor emits light including the image information, and the light emitted by the first optical processor includes a first polarized light of a first wavelength, a first polarized light of a second wavelength, and a first polarized light of a third wavelength. A polarized light, the first polarized visible light is the first polarized light of the first wavelength;
    所述第一光阀射出的第二偏振可见光为所述第一波长的第二偏振光，所述第一偏振光的偏振方向垂直于所述第二偏振光的偏振方向；The second polarized visible light emitted by the first light valve is the second polarized light of the first wavelength, and the polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light;
    所述投影设备还包括：第一偏振干涉滤光片、第二偏振分光器、第二偏振干涉滤光片、第三偏振分光器、第二光阀、第三光阀、第三偏振干涉滤光片、第一波片、第四偏振干涉滤光片、第四偏振分光器；其中，The projection device also includes: a first polarization interference filter, a second polarization beam splitter, a second polarization interference filter, a third polarization beam splitter, a second light valve, a third light valve, and a third polarization interference filter The light plate, the first wave plate, the fourth polarization interference filter, and the fourth polarization beam splitter; among them,
    所述第一光处理器射出的光穿过所述第一偏振干涉滤光片入射至所述第二偏振分光器，所述第一偏振干涉滤光片将入射的所述第一波长的第一偏振光转换为所述第一波长的第二偏振光；The light emitted by the first optical processor passes through the first polarization interference filter and enters the second polarization beam splitter, and the first polarization interference filter transmits the incident wavelength of the first wavelength A polarized light is converted into a second polarized light of the first wavelength;
    所述第二偏振分光器反射来自所述第一偏振干涉滤光片的所述第二波长的第一偏振光以及所述第三波长的第一偏振光，所述第二偏振分光器透射来自所述第一偏振干涉滤光片的所述第一波长的第二偏振光，经所述第二偏振分光器反射的所述第二波长的第一偏振光、所述第三波长的第一偏振光入射至所述第二偏振干涉滤光片，透射所述第二偏振分光器的所述第一波长的第二偏振光入射至所述第一波片；The second polarization beam splitter reflects the first polarization light of the second wavelength and the first polarization light of the third wavelength from the first polarization interference filter, and the second polarization beam splitter transmits light from The second polarization of the first wavelength of the first polarization interference filter, the first polarization of the second wavelength and the first polarization of the third wavelength reflected by the second polarization beam splitter Polarized light is incident on the second polarization interference filter, and the second polarized light of the first wavelength that transmits the second polarization beam splitter is incident on the first wave plate;
    来自所述第二偏振分光器的所述第二波长的光、所述第三波长的光穿过所述第二偏振干涉滤光片入射至所述第三偏振分光器，所述第二偏振干涉滤光片将入射的所述第二波长的第一偏振光转换为所述第二波长的第二偏振光；The light of the second wavelength and the light of the third wavelength from the second polarization beam splitter pass through the second polarization interference filter and enter the third polarization beam splitter. The interference filter converts the incident first polarized light of the second wavelength into the second polarized light of the second wavelength;
    所述第三偏振分光器透射来自所述第二偏振干涉滤光片的所述第二波长的第二偏振光，所述第三偏振分光器反射来自所述第二偏振干涉滤光片的所述第三波长的第一偏振光，透射所述第三偏振分光器的所述第二波长的第二偏振光垂直射入所述第二光阀，经所述第三偏振分光器反射的所述第三波长的第一偏振光垂直射入所述第三光阀；The third polarization beam splitter transmits the second polarized light of the second wavelength from the second polarization interference filter, and the third polarization beam splitter reflects all the light from the second polarization interference filter. The first polarized light of the third wavelength, the second polarized light of the second wavelength transmitted through the third polarization beam splitter and vertically enter the second light valve, and all the light reflected by the third polarization beam splitter The first polarized light of the third wavelength is vertically incident into the third light valve;
    所述第二光阀采集透射所述第三偏振分光器的所述第二波长的第二偏振光，所述第二光阀将入射的所述第二波长的第二偏振光转换为所述第二波长的第一偏振光，所述第二光阀垂直射出经所述第二光阀转换得到的所述第二波长的第一偏振光，所述第二光阀射出的所述第二波长的第一偏振光经所述第三偏振分光器反射至所述第三偏振干涉滤光片；The second light valve collects the second polarized light of the second wavelength that transmits the third polarization beam splitter, and the second light valve converts the incident second polarized light of the second wavelength into the The first polarized light of the second wavelength, the second light valve vertically emits the first polarized light of the second wavelength converted by the second light valve, and the second light valve emits the second polarized light The first polarized light of the wavelength is reflected by the third polarization beam splitter to the third polarization interference filter;
    所述第三光阀采集经所述第三偏振分光器反射的所述第三波长的第一偏振光，所述第三光阀将入射的所述第三波长的第一偏振光转换为所述第三波长的第二偏振光，所述第三光阀垂直射出经所述第三光阀转换得到的所述第三波长的第二偏振光，所述第三光阀射出的所述第三波长的第二偏振光透射所述第三偏振分光器，透射所述第三偏振分光器的第三波长的第二偏振光入射至所述第三偏振干涉滤光片；The third light valve collects the first polarized light of the third wavelength reflected by the third polarization beam splitter, and the third light valve converts the incident first polarized light of the third wavelength into all The second polarized light of the third wavelength, the third light valve vertically emits the second polarized light of the third wavelength converted by the third light valve, and the first light emitted by the third light valve The second polarized light of three wavelengths transmits the third polarization beam splitter, and the second polarized light of the third wavelength that transmits the third polarization beam splitter is incident on the third polarization interference filter;
    来自所述第三偏振分光器的所述第二波长的光、所述第三波长的光穿过所述第三偏振干涉滤光片入射至所述第四偏振分光器，所述第三偏振干涉滤光片将来自所述第三偏振分光器的所述第二波长的第一偏振光转换为所述第二波长的第二偏振光；The light of the second wavelength and the light of the third wavelength from the third polarization beam splitter pass through the third polarization interference filter and enter the fourth polarization beam splitter. An interference filter converts the first polarized light of the second wavelength from the third polarization beam splitter into the second polarized light of the second wavelength;
    所述第一波片将来自所述第二偏振分光器的所述第一波长的第二偏振光转换为所述第一波长的第一偏振光，所述第一波片射出经所述第一波片转换得到的所述第一波长的第一偏振光，所述第一波片射出的所述第一波长的第一偏振光经所述第一侧反射至所述第一光阀；The first wave plate converts the second polarized light of the first wavelength from the second polarization beam splitter into the first polarized light of the first wavelength, and the first wave plate emits through the first polarized light The first polarized light of the first wavelength converted by a wave plate, and the first polarized light of the first wavelength emitted by the first wave plate is reflected to the first light valve through the first side;
    所述第四偏振干涉滤光片将透射所述第一偏振分光器的所述第一波长的第二偏振光转换为所述第一波长的第一偏振光，所述第四偏振干涉滤光片射出经所述第四偏振干涉滤光片转换得到的所述第一波长的第一偏振光，所述第四偏振干涉滤光片射出的所述第一波长的第一偏振光入射至所述第四偏振分光器；The fourth polarization interference filter converts the second polarization light of the first wavelength transmitted through the first polarization beam splitter into the first polarization light of the first wavelength, and the fourth polarization interference filter The film emits the first polarized light of the first wavelength converted by the fourth polarization interference filter, and the first polarized light of the first wavelength emitted by the fourth polarization interference filter is incident on the The fourth polarization beam splitter;
    所述第四偏振分光器反射来自所述第四偏振干涉滤光片的所述第一波长的第一偏振光，所述第四偏振分光器透射来自所述第三偏振干涉滤光片的所述第二波长的第二偏振光、所述第三波长的第二偏振光，经所述第四偏振分光器反射的所述第一波长的第一偏振光入射至所述成像透镜，透射所述第四偏振分光器的所述第二波长的第二偏振光、所述第三波长的第二偏振光入射至所述成像透镜，来自所述第一红外偏振转换器的红外光经所述第四偏振分光器反射至所述第四偏振干涉滤光片，来自所述第四偏振分光器的红外光穿过所述第四偏振干涉滤光片入射至所述第二侧，所述第四偏振分光器射出的所述第一波长的第一偏振光、所述第二波长的第二偏振光、所述第三波长的第二偏振光以及射入所述第四偏振分光器的红外光相互平行。The fourth polarization beam splitter reflects the first polarized light of the first wavelength from the fourth polarization interference filter, and the fourth polarization beam splitter transmits all the light from the third polarization interference filter. The second polarized light of the second wavelength, the second polarized light of the third wavelength, the first polarized light of the first wavelength reflected by the fourth polarization beam splitter enters the imaging lens, and transmits the light The second polarized light of the second wavelength and the second polarized light of the third wavelength of the fourth polarization beam splitter are incident on the imaging lens, and the infrared light from the first infrared polarization converter passes through the The fourth polarization beam splitter is reflected to the fourth polarization interference filter, and the infrared light from the fourth polarization beam splitter passes through the fourth polarization interference filter and is incident on the second side. The first polarized light of the first wavelength, the second polarized light of the second wavelength, the second polarized light of the third wavelength emitted by the four-polarization beam splitter, and the infrared light that enters the fourth polarized beam splitter The lights are parallel to each other.
  11. 根据权利要求5至10中任一项所述的投影设备，其特征在于，所述第一波长为625～740nm，所述第二波长为440～475nm，所述第三波长为492～577nm。The projection device according to any one of claims 5 to 10, wherein the first wavelength is 625-740 nm, the second wavelength is 440-475 nm, and the third wavelength is 492-577 nm.
  12. 根据权利要求1至11中任一项所述的投影设备，其特征在于，所述用户在所述投影区域内作用的红外光包括以下的任一种：The projection device according to any one of claims 1 to 11, wherein the infrared light applied by the user in the projection area includes any one of the following:
    由红外线遥控器发出的、经所述投影区域反射的红外光；The infrared light emitted by the infrared remote control and reflected by the projection area;
    杆件上的红外线光源发出的红外光；The infrared light emitted by the infrared light source on the rod;
    投影区域以及手指反射的红外光；Projection area and infrared light reflected by fingers;
    投影区域以及杆件反射的红外光。The infrared light reflected by the projection area and the rods.
  13. 一种投影设备，其特征在于，包括：第二光处理器、成像透镜、第一偏振分光器、第一偏振分光器、第一光阀、第二红外偏振转换器、图像传感器、图像处理器；其中，A projection device, characterized by comprising: a second light processor, an imaging lens, a first polarization beam splitter, a first polarization beam splitter, a first light valve, a second infrared polarization converter, an image sensor, and an image processor ;among them,
    所述第二光处理器射出包括投影图像的图像信息的第二偏振可见光，所述第二偏振可见光属于第二偏振光；The second light processor emits second polarized visible light including image information of the projected image, and the second polarized visible light belongs to the second polarized light;
    所述第一偏振分光器透射来自所述第二光处理器的第二偏振可见光，透射所述第一偏振分光器的第二偏振可见光垂直入射至所述第一光阀；The first polarizing beam splitter transmits the second polarized visible light from the second light processor, and the second polarized visible light transmitted through the first polarizing beam splitter is perpendicularly incident to the first light valve;
    所述第一光阀采集所述透射所述第一偏振分光器的第二偏振可见光，所述第一光阀将入射的第二偏振可见光转换为第一偏振可见光，所述第一光阀垂直射出经所述第一光阀转换得到的第一偏振可见光，所述第一光阀射出的第一偏振可见光经所述第一偏振分光器反射，所述第一偏振可见光属于第一偏振光，所述第一偏振光的偏振方向垂直于所述第二偏振光的偏振方向；The first light valve collects the second polarized visible light transmitted through the first polarization beam splitter, the first light valve converts the incident second polarized visible light into the first polarized visible light, and the first light valve is vertical The first polarized visible light converted by the first light valve is emitted, the first polarized visible light emitted by the first light valve is reflected by the first polarization beam splitter, and the first polarized visible light belongs to the first polarized light, The polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light;
    经所述第一偏振分光器反射的第一偏振可见光穿过所述第二红外偏振转换器、所述成像透镜并射出所述投影设备，射出所述投影设备的光在投影区域内形成所述投影图像，用户在所述投影区域内作用的红外光射入所述投影设备，射入所述投影设备的红外光穿过所述成像透镜并入射至所述第二红外偏振转换器；The first polarized visible light reflected by the first polarization beam splitter passes through the second infrared polarization converter, the imaging lens and exits the projection device. The light exiting the projection device forms the Projecting an image, the infrared light applied by the user in the projection area is incident on the projection device, and the infrared light incident on the projection device passes through the imaging lens and is incident on the second infrared polarization converter;
    所述第二红外偏振转换器将来自所述成像透镜的红外光转换为第二偏振红外光，经所述第二红外偏振转换器转换得到的第二偏振红外光属于所述第二偏振光，所述第二红外偏振转换器射出经所述第二红外偏振转换器转换得到的第二偏振红外光，所述第二红外偏振转换器射出的第二偏振红外光透射所述第一偏振分光器，射出所述第一偏振分光器的第二偏振可见光平行于射入所述第一偏振分光器的红外光；The second infrared polarization converter converts the infrared light from the imaging lens into a second polarization infrared light, and the second polarization infrared light converted by the second infrared polarization converter belongs to the second polarization light, The second infrared polarization converter emits second polarization infrared light converted by the second infrared polarization converter, and the second polarization infrared light emitted by the second infrared polarization converter transmits the first polarization beam splitter , The second polarized visible light emitted from the first polarization beam splitter is parallel to the infrared light emitted into the first polarization beam splitter;
    透射所述第一偏振分光器的红外光入射至所述图像传感器，所述图像传感器采集来自所述第一偏振分光器的红外光；The infrared light transmitted through the first polarization beam splitter is incident on the image sensor, and the image sensor collects the infrared light from the first polarization beam splitter;
    图像处理器，根据所述图像传感器的采集结果以及所述第一光阀的采集结果，确定所述用户在所述投影图像上的指示位置。The image processor determines the indicated position of the user on the projection image according to the collection result of the image sensor and the collection result of the first light valve.
  14. 根据权利要求13所述的投影设备，其特征在于，The projection device according to claim 13, wherein:
    所述第二光处理器射出包括所述图像信息的光，所述第二光处理器射出的光包括第一波长的第二偏振光、第二波长的第二偏振光、第三波长的第二偏振光，所述第二偏振可见光为所述第一波长的第二偏振光；The second optical processor emits light including the image information, and the light emitted by the second optical processor includes a second polarized light with a first wavelength, a second polarized light with a second wavelength, and a second polarized light with a third wavelength. Two-polarized light, the second-polarized visible light is the second-polarized light of the first wavelength;
    所述第一光阀射出的第一偏振可见光为所述第一波长的第一偏振光；The first polarized visible light emitted by the first light valve is the first polarized light of the first wavelength;
    所述投影设备还包括：第二偏振分光器、第三偏振分光器、第二光阀、第三光阀、合光器；其中，The projection device further includes: a second polarization beam splitter, a third polarization beam splitter, a second light valve, a third light valve, and a light combiner; wherein,
    所述第二偏振分光器透射来自所述第二光处理器的所述第二波长的第二偏振光，透射所述第二偏振分光器的所述第二波长的第二偏振光垂直射入所述第二光阀；The second polarizing beam splitter transmits the second polarized light of the second wavelength from the second optical processor, and the second polarized light of the second wavelength that transmits the second polarizing beam splitter is incident vertically The second light valve;
    所述第二光阀采集透射所述第二偏振分光器的所述第二波长的第二偏振光，所述第二光阀将入射的所述第二波长的第二偏振光转换为所述第二波长的第一偏振光，所述第二光阀垂直射出经所述第二光阀转换得到的所述第二波长的第一偏振光，所述第二光阀射出的所述第二波长的第一偏振光经所述第二偏振分光器反射；The second light valve collects the second polarized light of the second wavelength that transmits the second polarization beam splitter, and the second light valve converts the incident second polarized light of the second wavelength into the The first polarized light of the second wavelength, the second light valve vertically emits the first polarized light of the second wavelength converted by the second light valve, and the second light valve emits the second polarized light The first polarized light of the wavelength is reflected by the second polarizing beam splitter;
    所述第三偏振分光器透射来自所述第二光处理器的所述第三波长的第二偏振光，透射所述第三偏振分光器的所述第三波长的第二偏振光垂直射入所述第三光阀；The third polarizing beam splitter transmits the second polarized light of the third wavelength from the second optical processor, and the second polarized light of the third wavelength that transmits the third polarizing beam splitter is vertically incident The third light valve;
    所述第三光阀采集透射所述第三偏振分光器的所述第三波长的第二偏振光，所述第三光阀将入射的所述第三波长的第二偏振光转换为所述第三波长的第一偏振光，所述第三光阀垂直射出经所述第二光阀转换得到的所述第三波长的第一偏振光，所述第三光阀射出的所述第三波长的第一偏振光经所述第三偏振分光器反射；The third light valve collects the second polarized light of the third wavelength that transmits the third polarization beam splitter, and the third light valve converts the incident second polarized light of the third wavelength into the The first polarized light of the third wavelength, the third light valve vertically emits the first polarized light of the third wavelength converted by the second light valve, and the third light valve emits the third light The first polarized light of the wavelength is reflected by the third polarization beam splitter;
    所述合光器汇合来自所述第一光阀的所述第一波长的光、来自所述第二光阀的所述第二波长的光、来自所述第三光阀的所述第三波长的光，经所述合光器汇合的光沿目标方向射出所述合光器，经所述合光器汇合的光穿过所述第二红外偏振转换器入射至所述成像透镜，所述来自所述第二红外偏振转换器的红外光沿所述目标方向的相反方向入射至所述合光器，所述第一波长的光包括所述第一波长的第一偏振光和/或所述第一波长的第二偏振光，所述第二波长的光包括所述第二波长的第一偏振光和/或所述第二波长的第二偏振光，所述第三波长的光包括所述第三波长的第一偏振光和/所述或第三波长的第二偏振光；所 述合光器包括：The light combiner combines the light of the first wavelength from the first light valve, the light of the second wavelength from the second light valve, and the third light from the third light valve. Wavelength light, the light combined by the light combiner exits the light combiner along the target direction, the light combined by the light combiner passes through the second infrared polarization converter and enters the imaging lens, so The infrared light from the second infrared polarization converter is incident on the light combiner in a direction opposite to the target direction, and the light of the first wavelength includes the first polarized light of the first wavelength and/or The second polarized light of the first wavelength, the light of the second wavelength includes the first polarized light of the second wavelength and/or the second polarized light of the second wavelength, and the light of the third wavelength Including the first polarized light of the third wavelength and/or the second polarized light of the third wavelength; the light combiner includes:
    垂直且相交的第一反射层以及第二反射层，所述第二反射层将所述第一反射层划分为面积相同的两个部分，所述第一反射层将所述第二反射层划分为面积相同的两个部分，其中，A first reflective layer and a second reflective layer that are perpendicular and intersecting, the second reflective layer divides the first reflective layer into two parts with the same area, and the first reflective layer divides the second reflective layer Are two parts with the same area, where
    所述第一反射层反射所述来自所述第一光阀的所述第一波长的光以及所述来自所述第二红外偏振转换器的红外光，所述第一反射层透射所述来自所述第二光阀的所述第二波长的光以及所述来自所述第三光阀的所述第三波长的光，所述来自所述第一光阀的所述第一波长的光沿所述目标方向自所述第一反射层射出，所述来自所述第二红外偏振转换器的红外光沿所述目标方向的相反方向入射至所述第一反射层，The first reflective layer reflects the light of the first wavelength from the first light valve and the infrared light from the second infrared polarization converter, and the first reflective layer transmits the light from the The light of the second wavelength of the second light valve and the light of the third wavelength from the third light valve, the light of the first wavelength from the first light valve Emitted from the first reflective layer along the target direction, and the infrared light from the second infrared polarization converter is incident on the first reflective layer along the opposite direction of the target direction,
    所述第二反射层反射所述来自所述第二光阀的所述第二波长的光，所述第二反射层透射所述来自所述第一光阀的所述第一波长的光、所述来自所述第三光阀的所述第三波长的光以及所述来自所述第二红外偏振转换器的红外光。The second reflective layer reflects the light of the second wavelength from the second light valve, and the second reflective layer transmits the light of the first wavelength from the first light valve, The light of the third wavelength from the third light valve and the infrared light from the second infrared polarization converter.
  15. 根据权利要求14所述的投影设备，其特征在于，所述第一反射层包括用于反射红外光的红外反射层。14. The projection device according to claim 14, wherein the first reflective layer comprises an infrared reflective layer for reflecting infrared light.
  16. 根据权利要求13至15中任一项所述的投影设备，其特征在于，所述第二红外偏振转换器包括：第一偏振转换器、第五偏振干涉滤光片；其中，The projection device according to any one of claims 13 to 15, wherein the second infrared polarization converter comprises: a first polarization converter and a fifth polarization interference filter; wherein,
    所述第一偏振转换器用于将穿过所述第一偏振转换器的光转换为所述第一偏振光，来自所述成像透镜的红外光经所述第一偏振转换器转换为第一偏振红外光，经所述第一偏振转换器转换得到的第一偏振红外光属于所述第一偏振光；The first polarization converter is used to convert the light passing through the first polarization converter into the first polarization light, and the infrared light from the imaging lens is converted into the first polarization by the first polarization converter. Infrared light, the first polarized infrared light converted by the first polarization converter belongs to the first polarized light;
    所述第五偏振干涉滤光片将来自所述第一偏振转换器的第一偏振红外光转换为第二偏振红外光。The fifth polarization interference filter converts the first polarization infrared light from the first polarization converter into the second polarization infrared light.
  17. 根据权利要求13所述的投影设备，其特征在于，The projection device according to claim 13, wherein:
    所述第二光处理器射出包括所述图像信息的光，所述第二光处理器射出的光包括第一波长的第二偏振光、第二波长的第二偏振光、第三波长的第二偏振光，所述第二偏振可见光为所述第一波长的第二偏振光；The second optical processor emits light including the image information, and the light emitted by the second optical processor includes a second polarized light with a first wavelength, a second polarized light with a second wavelength, and a second polarized light with a third wavelength. Two-polarized light, the second-polarized visible light is the second-polarized light of the first wavelength;
    所述第一光阀射出的第一偏振可见光为所述第一波长的第一偏振光；The first polarized visible light emitted by the first light valve is the first polarized light of the first wavelength;
    所述投影设备还包括：第二偏振分光器、第三偏振分光器、第二光阀、第三光阀、合光器；其中，The projection device further includes: a second polarization beam splitter, a third polarization beam splitter, a second light valve, a third light valve, and a light combiner; wherein,
    所述第二偏振分光器透射来自所述第二光处理器的所述第二波长的第二偏振光，透射所述第二偏振分光器的所述第二波长的第二偏振光垂直射入所述第二光阀；The second polarizing beam splitter transmits the second polarized light of the second wavelength from the second optical processor, and the second polarized light of the second wavelength that transmits the second polarizing beam splitter is incident vertically The second light valve;
    所述第二光阀采集透射所述第二偏振分光器的所述第二波长的第二偏振光，所述第二光阀将入射的所述第二波长的第二偏振光转换为所述第二波长的第一偏振光，所述第二光阀垂直射出经所述第二光阀转换得到的所述第二波长的第一偏振光，所述第二光阀射出的所述第二波长的第一偏振光经所述第二偏振分光器反射；The second light valve collects the second polarized light of the second wavelength that transmits the second polarization beam splitter, and the second light valve converts the incident second polarized light of the second wavelength into the The first polarized light of the second wavelength, the second light valve vertically emits the first polarized light of the second wavelength converted by the second light valve, and the second light valve emits the second polarized light The first polarized light of the wavelength is reflected by the second polarizing beam splitter;
    所述第三偏振分光器透射来自所述第二光处理器的所述第三波长的第二偏振光，透射所述第三偏振分光器的所述第三波长的第二偏振光垂直射入所述第三光阀；The third polarizing beam splitter transmits the second polarized light of the third wavelength from the second optical processor, and the second polarized light of the third wavelength that transmits the third polarizing beam splitter is vertically incident The third light valve;
    所述第三光阀采集透射所述第三偏振分光器的所述第三波长的第二偏振光，所述第三光阀将入射的所述第三波长的第二偏振光转换为所述第三波长的第一偏振光，所述第三光阀垂直射出经所述第二光阀转换得到的所述第三波长的第一偏振光，所述第三光阀射出的 所述第三波长的第一偏振光经所述第三偏振分光器反射；The third light valve collects the second polarized light of the third wavelength that transmits the third polarization beam splitter, and the third light valve converts the incident second polarized light of the third wavelength into the The first polarized light of the third wavelength, the third light valve vertically emits the first polarized light of the third wavelength converted by the second light valve, and the third light valve emits the third light The first polarized light of the wavelength is reflected by the third polarization beam splitter;
    所述合光器汇合来自所述第一光阀的所述第一波长的光、来自所述第二光阀的所述第二波长的光、来自所述第三光阀的所述第三波长的光，经所述合光器汇合的光沿目标方向射出所述合光器，经所述合光器汇合的光穿过所述第二红外偏振转换器入射至所述成像透镜，所述来自所述第一光阀的所述第一波长的光沿所述目标方向入射至所述合光器，所述来自所述第二红外偏振转换器的红外光沿所述目标方向的相反方向入射至所述合光器，所述第一波长的光包括所述第一波长的第一偏振光和/或所述第一波长的第二偏振光，所述第二波长的光包括所述第二波长的第一偏振光和/或所述第二波长的第二偏振光，所述第三波长的光包括所述第三波长的第一偏振光和/所述或第三波长的第二偏振光；所述合光器包括：The light combiner combines the light of the first wavelength from the first light valve, the light of the second wavelength from the second light valve, and the third light from the third light valve. Wavelength light, the light combined by the light combiner exits the light combiner along the target direction, the light combined by the light combiner passes through the second infrared polarization converter and enters the imaging lens, so The light of the first wavelength from the first light valve is incident on the light combiner along the target direction, and the infrared light from the second infrared polarization converter is opposite to the target direction Direction incident on the light combiner, the light of the first wavelength includes the first polarized light of the first wavelength and/or the second polarized light of the first wavelength, and the light of the second wavelength includes all The first polarized light of the second wavelength and/or the second polarized light of the second wavelength, the light of the third wavelength includes the first polarized light of the third wavelength and/or the light of the third wavelength Second polarized light; the light combiner includes:
    垂直且相交的第三反射层以及第四反射层，所述第四反射层将所述第三反射层划分为面积相同的两个部分，所述第三反射层将所述第四反射层划分为面积相同的两个部分，其中，Vertical and intersecting third and fourth reflective layers, the fourth reflective layer divides the third reflective layer into two parts with the same area, and the third reflective layer divides the fourth reflective layer Are two parts with the same area, where
    所述第三反射层透射来自所述第一光阀的所述第一波长的光、来自所述第二光阀的所述第二波长的光以及来自所述第二红外偏振转换器的红外光，所述第三反射层反射来自所述第三光阀的所述第三波长的光，The third reflective layer transmits light of the first wavelength from the first light valve, light of the second wavelength from the second light valve, and infrared light from the second infrared polarization converter Light, the third reflective layer reflects the light of the third wavelength from the third light valve,
    所述第四反射层透射来自所述第一光阀的所述第一波长的光、来自所述第三光阀的所述第三波长的光以及来自所述第二红外偏振转换器的红外光，所述第四反射层反射来自所述第二光阀的所述第二波长的光。The fourth reflective layer transmits light of the first wavelength from the first light valve, light of the third wavelength from the third light valve, and infrared light from the second infrared polarization converter Light, the fourth reflective layer reflects light of the second wavelength from the second light valve.
  18. 根据权利要求13所述的投影设备，其特征在于，The projection device according to claim 13, wherein:
    所述第二光处理器射出包括所述图像信息的光，所述第二光处理器射出的光包括第一波长的第二偏振光、第二波长的第二偏振光以及第三波长的第二偏振光，所述第二偏振可见光为所述第一波长的第二偏振光；The second optical processor emits light including the image information, and the light emitted by the second optical processor includes a second polarized light of a first wavelength, a second polarized light of a second wavelength, and a second polarized light of a third wavelength. Two-polarized light, the second-polarized visible light is the second-polarized light of the first wavelength;
    所述第一光阀射出的第一偏振可见光为所述第一波长的第一偏振光；The first polarized visible light emitted by the first light valve is the first polarized light of the first wavelength;
    所述投影设备还包括：第一偏振干涉滤光片、第二偏振分光器、第二偏振干涉滤光片、第三偏振分光器、第二光阀、第三光阀、第三偏振干涉滤光片、第一波片、第四偏振干涉滤光片、第四偏振分光器；其中，The projection device also includes: a first polarization interference filter, a second polarization beam splitter, a second polarization interference filter, a third polarization beam splitter, a second light valve, a third light valve, and a third polarization interference filter The light plate, the first wave plate, the fourth polarization interference filter, and the fourth polarization beam splitter; among them,
    所述第一光处理器射出的光穿过所述第一偏振干涉滤光片入射至所述第二偏振分光器，所述第一偏振干涉滤光片将入射的所述第一波长的第二偏振光转换为所述第一波长的第一偏振光；The light emitted by the first optical processor passes through the first polarization interference filter and enters the second polarization beam splitter, and the first polarization interference filter transmits the incident wavelength of the first wavelength Converting the two-polarized light into the first polarized light of the first wavelength;
    所述第二偏振分光器透射来自所述第一偏振干涉滤光片的所述第二波长的第二偏振光以及所述第三波长的第二偏振光，所述第二偏振分光器反射来自所述第一偏振干涉滤光片的所述第一波长的第一偏振光，透射所述第二偏振分光器的所述第二波长的第二偏振光、所述第三波长的第二偏振光入射至所述第二偏振干涉滤光片，经所述第二偏振分光器反射的所述第一波长的第一偏振光入射至所述第一波片；The second polarization beam splitter transmits the second polarization light of the second wavelength and the second polarization light of the third wavelength from the first polarization interference filter, and the second polarization beam splitter reflects from The first polarized light of the first wavelength of the first polarization interference filter transmits the second polarized light of the second wavelength and the second polarized light of the third wavelength of the second polarization beam splitter. Light is incident on the second polarization interference filter, and the first polarized light of the first wavelength reflected by the second polarization beam splitter is incident on the first wave plate;
    来自所述第二偏振分光器的所述第二波长的光、所述第三波长的光穿过所述第二偏振干涉滤光片入射至所述第三偏振分光器，所述第二偏振干涉滤光片将入射的所述第二波长的第二偏振光转换为所述第二波长的第一偏振光；The light of the second wavelength and the light of the third wavelength from the second polarization beam splitter pass through the second polarization interference filter and enter the third polarization beam splitter. The interference filter converts the incident second polarized light of the second wavelength into the first polarized light of the second wavelength;
    所述第三偏振分光器反射来自所述第二偏振干涉滤光片的所述第二波长的第一偏振 光，所述第三偏振分光器透射来自所述第二偏振干涉滤光片的所述第三波长的第二偏振光，经所述第三偏振分光器反射的所述第二波长的第一偏振光垂直射入所述第二光阀，透射所述第三偏振分光器的所述第三波长的第二偏振光垂直射入所述第三光阀；The third polarization beam splitter reflects the first polarized light of the second wavelength from the second polarization interference filter, and the third polarization beam splitter transmits all the light from the second polarization interference filter. The second polarized light of the third wavelength, the first polarized light of the second wavelength reflected by the third polarization beam splitter enters the second light valve perpendicularly, and transmits all the light of the third polarization beam splitter. The second polarized light of the third wavelength is incident perpendicularly to the third light valve;
    所述第二光阀采集经所述第三偏振分光器反射的所述第二波长的第一偏振光，所述第二光阀将入射的所述第二波长的第一偏振光转换为所述第二波长的第二偏振光，所述第二光阀垂直射出经所述第二光阀转换得到的所述第二波长的第二偏振光，所述第二光阀射出的所述第二波长的第二偏振光透射所述第三偏振分光器，透射所述第三偏振分光器的第二波长的第二偏振光入射至所述第三偏振干涉滤光片；The second light valve collects the first polarized light of the second wavelength reflected by the third polarization beam splitter, and the second light valve converts the incident first polarized light of the second wavelength into all The second polarized light of the second wavelength, the second light valve vertically emits the second polarized light of the second wavelength converted by the second light valve, and the first light emitted by the second light valve The second polarized light of two wavelengths transmits the third polarization beam splitter, and the second polarized light of the second wavelength that transmits the third polarization beam splitter is incident on the third polarization interference filter;
    所述第三光阀采集透射所述第三偏振分光器的所述第三波长的第二偏振光，所述第三光阀将入射的所述第三波长的第二偏振光转换为所述第三波长的第一偏振光，所述第三光阀垂直射出经所述第三光阀转换得到的所述第三波长的第一偏振光，所述第三光阀射出的所述第三波长的第一偏振光经所述第三偏振分光器反射至所述第三偏振干涉滤光片；The third light valve collects the second polarized light of the third wavelength that transmits the third polarization beam splitter, and the third light valve converts the incident second polarized light of the third wavelength into the The first polarized light of the third wavelength, the third light valve vertically emits the first polarized light of the third wavelength converted by the third light valve, and the third light valve emits the third light The first polarized light of the wavelength is reflected by the third polarization beam splitter to the third polarization interference filter;
    来自所述第三偏振分光器的所述第二波长的光、所述第三波长的光穿过所述第三偏振干涉滤光片入射至所述第四偏振分光器，所述第三偏振干涉滤光片将来自所述第三偏振分光器的所述第二波长的第二偏振光转换为所述第二波长的第一偏振光；The light of the second wavelength and the light of the third wavelength from the third polarization beam splitter pass through the third polarization interference filter and enter the fourth polarization beam splitter. An interference filter converts the second polarized light of the second wavelength from the third polarization beam splitter into the first polarized light of the second wavelength;
    所述第一波片将来自所述第二偏振分光器的所述第一波长的第一偏振光转换为所述第一波长的第二偏振光，所述第一波片射出经所述第一波片转换得到的所述第一波长的第二偏振光，所述第一波片射出的所述第一波长的第二偏振光透射所述第一偏振分光器，透射所述第一偏振分光器的所述第一波长的第二偏振光入射至所述第一光阀；The first wave plate converts the first polarized light of the first wavelength from the second polarization beam splitter into the second polarized light of the first wavelength, and the first wave plate emits through the first polarized light of the first wavelength. The second polarized light of the first wavelength converted by a wave plate, the second polarized light of the first wavelength emitted by the first wave plate is transmitted through the first polarization beam splitter, and the first polarized light is transmitted The second polarized light of the first wavelength of the optical splitter is incident on the first light valve;
    所述第四偏振干涉滤光片将经所述第一偏振分光器反射的所述第一波长的第一偏振光转换为所述第一波长的第二偏振光，所述第四偏振干涉滤光片射出经所述第四偏振干涉滤光片转换得到的所述第一波长的第二偏振光，所述第四偏振干涉滤光片射出的所述第一波长的第二偏振光入射至所述第四偏振分光器；The fourth polarization interference filter converts the first polarization light of the first wavelength reflected by the first polarization beam splitter into the second polarization light of the first wavelength, and the fourth polarization interference filter The light sheet emits the second polarized light of the first wavelength converted by the fourth polarization interference filter, and the second polarized light of the first wavelength emitted by the fourth polarization interference filter is incident on The fourth polarization beam splitter;
    所述第四偏振分光器透射来自所述第四偏振干涉滤光片的所述第一波长的第二偏振光，所述第四偏振分光器反射来自所述第三偏振干涉滤光片的所述第二波长的第一偏振光、所述第三波长的第一偏振光，透射所述第四偏振分光器的所述第一波长的第二偏振光入射至所述第二红外偏振转换器，经所述第四偏振分光器反射的所述第二波长的第一偏振光、所述第三波长的第一偏振光入射至所述第二红外偏振转换器，来自所述第二红外偏振转换器的红外光透射所述第四偏振分光器，透射所述第四偏振分光器的红外光穿过所述第四偏振干涉滤光片入射至所述第一偏振分光器，所述第四偏振分光器射出的所述第一波长的第一偏振光、所述第二波长的第二偏振光、所述第三波长的第二偏振光以及射入所述第四偏振分光器的红外光相互平行。The fourth polarization beam splitter transmits the second polarization light of the first wavelength from the fourth polarization interference filter, and the fourth polarization beam splitter reflects all the light from the third polarization interference filter. The first polarized light of the second wavelength, the first polarized light of the third wavelength, and the second polarized light of the first wavelength transmitted through the fourth polarization beam splitter are incident on the second infrared polarization converter , The first polarized light of the second wavelength and the first polarized light of the third wavelength reflected by the fourth polarization beam splitter are incident on the second infrared polarization converter and come from the second infrared polarization The infrared light of the converter transmits the fourth polarization beam splitter, the infrared light that transmits the fourth polarization beam splitter passes through the fourth polarization interference filter and enters the first polarization beam splitter. The first polarized light of the first wavelength, the second polarized light of the second wavelength, the second polarized light of the third wavelength emitted by the polarization beam splitter, and the infrared light that enters the fourth polarization beam splitter Parallel to each other.
  19. 根据权利要求13至18中任一项所述的投影设备，其特征在于，所述第一波长为625～740nm，所述第二波长为440～475nm，所述第三波长为492～577nm。The projection device according to any one of claims 13 to 18, wherein the first wavelength is 625-740 nm, the second wavelength is 440-475 nm, and the third wavelength is 492-577 nm.
  20. 根据权利要求13至19中任一项所述的投影设备，其特征在于，所述用户在所述投影区域内作用的红外光包括以下的任一种：The projection device according to any one of claims 13 to 19, wherein the infrared light applied by the user in the projection area includes any one of the following:
    由红外线遥控器发出的、经所述投影区域反射的红外光；The infrared light emitted by the infrared remote control and reflected by the projection area;
    手持杆件上的红外线光源发出的红外光；The infrared light emitted by the infrared light source on the hand-held rod;
    投影区域反射的红外光以及手指反射的红外光；The infrared light reflected by the projection area and the infrared light reflected by the finger;
    投影区域反射的红外光以及杆件反射的红外光。The infrared light reflected by the projection area and the infrared light reflected by the rod.
  21. 一种投影交互的方法，其特征在于，所述方法由权利要求1至20中任一项所述的投影设备执行，所述方法包括：A method of projection interaction, characterized in that the method is executed by the projection device according to any one of claims 1 to 20, and the method comprises:
    所述投影设备获取红外光的多个采集结果，所述红外光由手持红外线光源射出，所述投影设备包括如；The projection device acquires multiple collection results of infrared light, the infrared light is emitted by a handheld infrared light source, and the projection device includes such as;
    所述投影设备根据所述多个所述采集结果以及所述投影设备的投影图像，确定用户手势以及所述用户手势在所述投影图像上的相对位置；Determining, by the projection device, the user gesture and the relative position of the user gesture on the projection image according to the plurality of collection results and the projection image of the projection device;
    所述投影设备根据所述用户手势以及所述相对位置，执行目标操作。The projection device performs a target operation according to the user gesture and the relative position.
  22. 根据权利要求21所述的方法，其特征在于，所述用户手势包括移动手势、点击手势、放大手势、缩小手势中的任一个。The method according to claim 21, wherein the user gesture includes any one of a move gesture, a tap gesture, a zoom-in gesture, and a zoom-out gesture.
  23. 根据权利要求21或22所述的方法，其特征在于，所述手持红外线光源包括红外线遥控器，或者，设置在手持杆件远离手的一端的红外线光源。The method according to claim 21 or 22, wherein the handheld infrared light source comprises an infrared remote control, or an infrared light source arranged at an end of the handheld rod away from the hand.
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