WO2021169593A1 - Projector - Google Patents

Projector Download PDF

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Publication number
WO2021169593A1
WO2021169593A1 PCT/CN2020/142119 CN2020142119W WO2021169593A1 WO 2021169593 A1 WO2021169593 A1 WO 2021169593A1 CN 2020142119 W CN2020142119 W CN 2020142119W WO 2021169593 A1 WO2021169593 A1 WO 2021169593A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
color light
projector
dichroic mirror
optical path
Prior art date
Application number
PCT/CN2020/142119
Other languages
French (fr)
Chinese (zh)
Inventor
郭祖强
顾佳琦
李屹
Original Assignee
深圳光峰科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 深圳光峰科技股份有限公司 filed Critical 深圳光峰科技股份有限公司
Publication of WO2021169593A1 publication Critical patent/WO2021169593A1/en

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    • 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
    • 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
    • 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
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
    • 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
    • H04N9/315—Modulator illumination systems
    • H04N9/3161—Modulator illumination systems using laser light sources

Definitions

  • the present invention relates to the field of display technology, in particular to a projector.
  • the liquid crystal display projector uses a 3-chip High Temperature Poly Silicon (HTPS) LCD liquid crystal panel, or 3LCD projector for short.
  • the system usually divides the white light generated by the light source into RGB (red, green, blue)
  • RGB red, green, blue
  • the monochromatic light is respectively modulated by the corresponding RGB liquid crystal display panel, and then enters the lens through the light combining prism to synthesize white light.
  • the dichroic film on the dichroic film is an optical interference film.
  • the spectral characteristics of the divided color light vary with the angle of the incident light. As shown in Figure 1, when the angle of incidence of light increases, the half-power wavelength of the spectrum (the point where the transmittance is 50%) shifts toward the shorter wave. Therefore, the unevenness of the monochromatic field of the split color light will be Very serious.
  • the embodiment of the present invention proposes a projector to solve the above problems.
  • the embodiment of the present invention provides a projector including a laser fluorescent light source and a dichroic optical system.
  • the light beam emitted by the laser fluorescent light source forms a discontinuous spectrum.
  • the discontinuous spectrum includes a first waveband and a second waveband that are separated from each other.
  • the first waveband A non-light band is formed between the second band and a dichroic optical system.
  • the dichroic optical system includes a first dichroic mirror.
  • the first dichroic mirror has a set spectral characteristic.
  • the transition spectrum section between the transmission spectrum section and the transmission spectrum section is located in the non-light band, and the first dichroic mirror separates the light beam emitted by the laser fluorescent light source into the first color light and the second color light through the spectral characteristics, wherein, the first color light corresponds to the first wavelength band, and the second color light corresponds to the second wavelength band.
  • the wavelength range of the non-optical band is between 470 nm and 490 nm.
  • the first color light is blue light.
  • the projector further includes a second dichroic mirror, which is located in the light path formed by the second color light, and is used to separate the second color light into the third color light and the fourth color light.
  • the third color light is red light
  • the fourth color light is green light
  • the light path length formed by the third color light is greater than the light path length formed by the fourth color light
  • the projector further includes a first condenser lens.
  • the first condenser lens is arranged on the optical path formed by the second color light and is located between the first dichroic mirror and the second dichroic mirror, so that the The dichroic light forms a telecentric light path at the second dichroic mirror.
  • the projector further includes a light modulation system.
  • the light modulation system includes a first modulation section, a second modulation section, and a third modulation section.
  • the modulation part is arranged in the optical path formed by the third color light
  • the third modulation part is arranged in the optical path formed by the fourth color light.
  • the projector further includes a second condenser lens, the second condenser lens is arranged on the optical path formed by the first color light, and the second condenser lens is arranged between the first dichroic mirror and the first modulation part. between.
  • the projector further includes a third condenser lens, the third condenser lens is arranged on the optical path formed by the third color light, and the third condenser lens is located between the second dichroic lens and the third modulation part.
  • the projector further includes at least two relay lenses, and the two relay lenses are arranged on the optical path formed by the third color light.
  • the projector further includes a first lens array, a second lens array, and a fourth condenser lens.
  • the first lens array, the second lens array, and the fourth condenser lens are sequentially arranged on the laser fluorescent light source and the first condenser lens. Between the dichroic mirrors, the first lens array is used to divide the light source light emitted by the laser fluorescent light source into a plurality of partial beams; the second lens array is used to condense the plurality of partial beams.
  • the first modulation section, the second modulation section, and the third modulation section are all liquid crystal displays.
  • the projector further includes a polarization conversion system, which is arranged between the laser fluorescent light source and the first dichroic mirror, and the polarization conversion system is used to convert the light beam emitted by the laser fluorescent light source into polarized light.
  • a polarization conversion system which is arranged between the laser fluorescent light source and the first dichroic mirror, and the polarization conversion system is used to convert the light beam emitted by the laser fluorescent light source into polarized light.
  • each of the first modulation section, the second modulation section, and the third modulation section includes a liquid crystal panel and two polarizing filters, and the liquid crystal panel is located between the two polarizing filters.
  • the projector further includes a reflective lens, and the reflective lens is arranged on the optical path formed by the third color light so as to bend the optical path formed by the third color light.
  • the projector includes at least two relay lenses, and at least two of the relay lenses are both arranged on the optical path formed by the third color light.
  • the projector provided by the present invention makes the transition spectral section between the reflection spectral section and the transmission spectral section of the first dichroic mirror located in the non-light band of the light beam to be separated, thereby reducing the influence of the drift of the first color light spectrum on the actual spectroscopic result.
  • the influence ensures the uniformity of the monochromatic field of the first color light after light splitting, so that the color of the light beam transmitted or reflected by the projector is more uniform.
  • FIG. 1 is a schematic diagram of the relationship between P light transmittance and wavelength of a dichroic plate of an existing projector according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a structural light path of a projector provided by an embodiment of the present invention
  • FIG. 3 is a schematic diagram of the spectrum of the laser fluorescent light source of the projector and the reflection spectrum of the first dichroic mirror according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a structural light path from a laser fluorescent light source of a projector to a second dichroic mirror according to an embodiment of the present invention.
  • an embodiment of the present invention provides a projector 100.
  • the projector 100 may use a 3-chip LCD liquid crystal display panel of High Temperature Poly Silicon (High Temperature Polysilicon, hereinafter referred to as HTPS), referred to as a 3LCD projector.
  • HTPS High Temperature Polysilicon
  • the optical system used by the 3LCD projector can decompose the white light emitted by the laser fluorescent light source 10 into three colors of R (red), G (green), and B (blue), which are transmitted through their respective liquid crystal displays. Board and project the image through the projection lens.
  • the image projected by the 3LCD projector has the characteristics of bright, natural and soft light, so that the light will not harm the eyes of the viewer.
  • the projector 100 includes a laser fluorescent light source 10 and a dichroic optical system 20.
  • the light beam emitted by the laser fluorescent light source 10 forms a discontinuous spectrum.
  • the discontinuous spectrum includes a first waveband W1 and a second waveband W3 that are separated from each other.
  • a light-free wavelength band W2 is formed between the second wavelength band W3.
  • the dichroic optical system 20 includes a first dichroic mirror 21.
  • the first dichroic mirror 21 is used to separate the light beam emitted by the laser fluorescent light source 10 into the first color light LB and The second color light LY, the first color light LB corresponds to the first waveband W1, and the second color light LY corresponds to the second waveband W3.
  • the first dichroic mirror 21 achieves the set spectral characteristics through a coating process, and the spectral characteristics are expressed as: the transition between the reflection and transmission spectrum in the spectral characteristics and the transition spectrum in the laser fluorescent light source
  • the non-optical wavelength band W2 corresponds, so that after the laser phosphor beam is split by the first dichroic mirror 21, the light beams corresponding to the first wavelength band W1 and the second wavelength band W3 are separated.
  • the projector 100 provided by the present invention locates the transition spectral range between the reflection spectral range of the first dichroic lens 21 and the lens spectral range in the non-optical wavelength band W3.
  • the first wavelength band W1 of the laser fluorescent beam is completely Located in the reflection spectrum section of the first dichroic mirror 21
  • the second wavelength band W3 of the laser fluorescent beam is completely located in the transmission spectrum section of the first dichroic mirror 21.
  • the reflection spectrum band of the first dichroic mirror 21 includes the first wavelength band W1 and reserved wavelength band of the laser fluorescent beam
  • the transmission spectrum band of the first dichroic mirror 21 includes the second wavelength band W3 and reserved wavelength band of the laser fluorescent beam.
  • the spectrum of the first dichroic lens 21 will drift with the size of the incident angle, it will affect the uniformity of the monochromatic field of the first color light LB or the second color light LY, by changing the reflection spectrum of the first dichroic lens 21
  • the transition spectrum with the lens spectrum is located in the non-light band W2, that is, falls between the first wave band W1 and the second wave band W3. In this way, due to the existence of the non-light wave band W2, even a certain shift will not affect the first wave.
  • the uniformity of the monochromatic field of the color light LB makes the color of the light beam projected by the projector 100 more uniform.
  • the dichroic optical system 20 further includes a second dichroic lens 22, which is arranged on the optical path formed by the second color light LY to separate the second color light LY into The third color light LR and the fourth color light LG.
  • the first dichroic mirror 21 and the second dichroic mirror 22 are both dichroic mirrors.
  • the dichroic mirrors almost completely transmit light of a certain wavelength, but almost completely reflect light of other wavelengths.
  • the first dichroic mirror 21 and the second dichroic mirror 22 are both flat glass, the first dichroic mirror 21 and the second dichroic mirror 22 are arranged in parallel, and the entrance of the first dichroic mirror 21 and the second dichroic mirror 22
  • the light surfaces all intersect with the exit light path LP of the laser fluorescent light source 10.
  • the angle formed by the light incident surface of the first dichroic mirror 21 and the light output path LP is less than 90°.
  • the reflection spectrum of the first color light LB drifts with the incident angle of the light source, it can be seen from Fig. 3 that the reflection spectrum falls into the non-light band W3, and the drift range of the reflection spectrum lies in the non-light band W3, but does not fall.
  • the drift of the reflection spectrum will not affect the actual spectroscopy results, and the uniformity of the monochromatic field of the first color light LB after spectroscopy is ensured, so that the projector 100 transmits The more uniform white light.
  • the first dichroic mirror 21 is an anti-blue, transparent and yellow dichroic mirror
  • the second dichroic mirror 22 is an anti-green, transparent and red dichroic mirror.
  • the wavelength range of the first waveband W1 is approximately between 440 nm and 470 nm
  • the waveband range of the second waveband W2 is approximately between 490 nm and 690 nm. It can be seen from Figure 3 that there is basically no light intensity in the wavelength band between the first waveband W1 and the second waveband W2, that is, there is no corresponding color light in this waveband, and this lightless waveband is the lightless waveband W3.
  • the wavelength range of the non-light band W3 is roughly between 470 nm and 490 nm, that is, the non-light band W3 is located between the blue and yellow light bands.
  • the first dichroic mirror 21 includes an incident surface S1, the first color light LB is reflected by the incident surface S1, the incident surface S1 is plated with a functional layer, and the incident surface S1 is plated with a functional layer to make the first color light
  • the reflection spectrum formed by the light LB falls in the no-light wavelength band W3, so that the reflection spectrum of the first color light LB does not fall in the first wavelength band W1 and the second wavelength band W2, so as to realize the monochromatic field of the first color light LB after the splitting. Uniformity.
  • the functional layer can be a multilayer reflective polarizing film, for example: the functional layer can be a film formed by alternating layers of isotropic and birefringent materials; the functional layer can use optical thicknesses distributed in various thicknesses, For example, the thickness distribution of one or both of the functional layers may change monotonously. In other words, the thickness of the optical repeating unit shows a continuous decrease or continuous increase along the thickness of the multilayer reflective polarizing film (for example, the thickness of the optical repeating unit does not show a tendency to increase along the part of the multilayer film. And along the other part of the multilayer film thickness reduction trend).
  • the functional layer may include a thickness distribution including one or more band packets.
  • a band packet is a multilayer stack structure with a certain layer thickness range, so that the multilayer stack structure reflects broadband wavelengths.
  • the blue wave band packet may have a certain optical thickness distribution such that it reflects blue light, that is, about 400 nm to 500 nm.
  • the specific structure and material of the functional layer are not limited, as long as the functional layer can make the reflection spectrum of the first color light LB fall within the non-light wavelength band W3.
  • the projector 100 includes a first lens array 31 and a second lens array 32.
  • the first lens array 31 and the second lens array 32 are arranged in the laser fluorescent light source 10 and the first sub Between the color mirrors 21, the first lens array 31 is used to divide the light source light emitted by the laser fluorescent light source 10 into a plurality of partial beams; the second lens array 32 is used to condense the plurality of partial beams.
  • the first lens array 31 is provided with a plurality of first microlenses (not shown), wherein the plurality of first microlenses are arranged in an array on at least one of the light-incident surface or the light-exit surface of the first lens array 31, and the second
  • the lens array 32 is provided with a plurality of second microlenses (not shown), and the plurality of second microlenses are distributed in an array on at least one of the light incident surface or the light exit surface of the second lens array 32.
  • the multiple micro lenses can be arranged in a rectangular array, an elliptical array, or an array of other shapes.
  • the projector 100 further includes a first condensing lens 41.
  • the first condensing lens 41 is arranged on the optical path formed by the second color light LY, and is located between the first dichroic mirror 21 and Between the second dichroic mirrors 22, so that the second color light LY forms a telecentric optical path at the second dichroic mirror 22, wherein the number of the first condenser lens 41 can be one, two or more, as In an example, at least two first condenser lenses 41 are provided on the optical path formed by the second color light LY, and are both located between the first dichroic mirror 21 and the second dichroic mirror 22, and the two first condenser lenses 41 It is used to realize the functions of overlapping and telecentricity of the beams divided by the first lens array 31.
  • the two first condenser lenses 41 can be biconvex lenses or single-convex lenses.
  • the incident surfaces of the two first condenser lenses 41 can be aspherical or spherical, and the first condenser lenses 41 can be of low refractive index and low refractive index. Dispersed glass lens, the light beam emitted by the first condenser lens 41 forms a telecentric optical path at the first dichroic mirror 21, and any light beam emitted by the second lens array 32 is incident on the first dichroic mirror 21.
  • the incident angles of the positions are all the same, because the larger the optical incident angle, the more the half-functional wavelength of the spectrum drifts toward shorter wavelengths, and whether the incident angle of the beam LY1 is equal to the incident angle of the beam LY2 will affect the uniformity of the white light of the system.
  • the incident angle of the light beam LY1 is equal to the incident angle of the light beam LY2. Therefore, the difference in the color coordinates of the fourth color light LG formed after the second color light LY is split is small, which ensures that The uniformity of the monochromatic field of the third color light LR and the fourth color light LG makes the color of the white light transmitted by the projector 100 more uniform.
  • the spherical image side can be reduced.
  • the curvature of the incident surface and the exit surface of the first condenser lens 41 may be the same or different, and may be adjusted according to actual requirements.
  • the two first condenser lenses 41 are bonded to each other to form an adhesive body, so as to reduce the distance between the two first condenser lenses 41.
  • the projector 100 further includes a second condenser lens 42, and the number of the second condenser lens 42 may be one, two or more.
  • the number of the second condenser lens 42 may be one, two or more.
  • at least two second condenser lenses 42 is provided between the reflecting mirror and the first dichroic mirror 21.
  • the two second condenser lenses 42 can be double-convex lenses or single-convex lenses.
  • the incident surfaces of the two second condenser lenses 42 can be aspherical or With a spherical surface, the second condenser lens 42 may be a glass lens with low refractive index and low dispersion. By arranging two second condensing lenses 42, the incident light beams can be collected more and the light intensity can be increased.
  • the second condensing lens 42 can make the second color light LY more uniform.
  • the projector 100 further includes a third condenser lens 44, the number of the third condenser lens 44 can be one, two or more, and the third condenser lens 44 is set on the third color light LR.
  • the incident surface of the third condenser lens 44 may be an aspheric surface or a spherical surface, and the third condenser lens 44 may be a glass lens with low refractive index and low dispersion.
  • the third condensing lens 44 can make the third color light LR more uniform.
  • the projector 100 further includes a fourth condenser lens 45 (as shown in FIG. 2).
  • the first lens array 31, the second lens array 32, and the fourth condenser lens 45 are sequentially arranged on the laser fluorescent light source 10
  • the incident surface of the fourth condenser lens 45 may be an aspheric surface or a spherical surface, and the fourth condenser lens 45 may be a glass lens with low refractive index and low dispersion.
  • the projector 100 may further include at least two relay lenses 43.
  • the two relay lenses 43 may be arranged on the optical path with the longest optical path length.
  • the optical path length of the third color light LR is greater than
  • the two relay lenses 43 can be arranged on the optical path of the third color light LR, which can prevent light utilization caused by light diffusion, etc. The efficiency drops.
  • the number of relay lenses 43 may be one or more.
  • the projector 100 further includes a polarization conversion system 33.
  • the polarization conversion system 33 is provided between the laser phosphor light source 10 and the first dichroic mirror 21.
  • the polarization conversion system 33 is used to convert the laser phosphor
  • the light beam emitted by the light source 10 is converted into polarized light.
  • the polarization conversion system 33 is disposed between the first lens array 31 and the first dichroic mirror 21.
  • the polarization conversion system 33 has the function of adjusting the polarization direction of each partial light beam separated by the first lens array 31 to one direction of linearly polarized light.
  • the polarization conversion system 33 includes a polarization separation film and a reflector.
  • the polarization separation film and the reflector are alternately arranged at predetermined intervals in a direction perpendicular to the exit light path LP of the laser fluorescent light source 10, wherein the polarization separation film transmits each part of the light beam containing One of the P-polarized light and S-polarized light (such as P-polarized light) reflects the other polarized light (such as S-polarized light), and the reflected other polarized light (such as S-polarized light) is Adjacent mirrors are bent and emitted according to the emission direction of one kind of polarized light (for example, P-polarized light), that is, according to the emission light path LP along the laser fluorescent light source 10.
  • the projector 100 further includes a light modulation system 50.
  • the light modulation system 50 includes a first modulation section 51, a second modulation section 52, and a third modulation section 53, and the first modulation section 51 is set in the first color light.
  • the second modulation section 52 is provided in the optical path of the third color light LR
  • the third modulation section 53 is provided in the optical path of the fourth color light LG.
  • the first modulation section 51, the second modulation section 52, and the third modulation section 53 are all liquid crystal displays (LCDs for short), and the first modulation section 51, the second modulation section 52, and the third modulation section 53 Each includes a liquid crystal panel 54 and two polarizing filters 55, and the liquid crystal panel 54 is located between the two polarizing filters 55.
  • each liquid crystal panel 54 is sealed between a pair of transparent glass substrates as an electro-optical material liquid crystal, for example, a polysilicon TFT is used as a switching element to modulate the polarization direction of each incident polarized light according to the provided image signal .
  • the second condenser lens 42 is provided between the first dichroic mirror 21 and the first modulation section 51
  • the third condenser lens 44 is provided between the second dichroic lens 22 and the third modulation section 53.
  • Each liquid crystal panel 54 may be a non-luminous and transmissive light modulation device for changing the spatial distribution of the polarization direction of the incident colored light.
  • Each color light incident on each liquid crystal panel 54 corresponds to a drive signal or a control signal input as an electric signal to each liquid crystal panel 54, and the polarization state is adjusted in units of pixels.
  • the polarization filter 55 is used to adjust the polarization direction of the illumination light incident on each liquid crystal panel 54, and the polarization filter 55 extracts modulated light in a predetermined polarization direction from the light emitted from each liquid crystal panel 54.
  • the projector 100 further includes a light synthesis system 60, and the first color light LB, the third color light LR, and the fourth color light LG are respectively injected into the light synthesis system 60 and synthesized to form a color image.
  • the light synthesis system 60 includes a cross dichroic prism, and a color image is synthesized based on each modulated optical image of each color light emitted from the polarization filter 55.
  • the cross dichroic prism includes four mutually bonded right-angle prisms. The right-angle sides of two adjacent right-angle prisms are bonded to each other. At the interface between the bonded right-angle prisms, a pair of multilayer dielectric films 61 crossing in an X shape are formed , 62.
  • One of the multilayer dielectric films 61 reflects red light, and the other multilayer dielectric film 62 reflects blue light.
  • the image light synthesized by the cross dichroic prism is used as a magnifying projection lens, and is projected as a color image on a screen (not shown) at an appropriate magnification.
  • the projector 100 further includes a reflective lens 70, which can be arranged on the optical path formed by the colored light to bend the optical path.
  • the reflective lens 70 may be arranged on the optical path of the third color light LR to bend the optical path of the third color light LR.
  • two reflective lenses 70 can be arranged on the optical path of the third color light LR at relatively intervals to reflect the optical path of the third color light LR twice to bend the light path twice, and the reflection surfaces of the two reflective lenses 70 form For a certain included angle, the included angle can be less than or equal to 90°.
  • the included angle is 90°
  • the beam of the third color light LR enters one of the reflective lenses at an incident angle of 45°, it is reflected and the formed light path is bent at an angle of 90°, and the reflected beam is shot
  • the angle at which the optical path formed by the reflection to the other reflecting lens is bent is 90°.
  • the reflective lens 70 may also be arranged on the optical path formed by other colored lights.
  • the reflective lens 70 may be arranged on the optical path of the first color light LB to reflect and guide the first color light LB.
  • the reflective lens 70 By setting the reflective lens 70, the light path formed by the colored light can be bent and a predetermined light path can be formed.
  • the included angle formed between the reflective surface of the reflective lens and the incident direction of the colored light can be adjusted according to actual requirements. For example, the included angle formed by the two can be greater than 90 degrees.
  • the reflection spectrum of the first color light LB falls in the non-light band W3, so that the drift of the reflection spectrum of the first color light LB does not affect the actual spectroscopy results, and ensures that the first color light LB after spectroscopy
  • the uniformity of the monochromatic field of the color light LB makes the color of the light beam projected by the projector 100 more uniform.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)

Abstract

The present invention provides a projector, comprising a laser fluorescence light source and a color separation optical system. A light beam emitted by the laser fluorescence light source forms a discontinuous spectrum, the discontinuous spectrum comprises a first waveband and a second waveband which are separated from each other, and a lightless waveband is formed between the first waveband and the second waveband; the color separation optical system comprises a first dichroic mirror, the first dichroic mirror has set spectral characteristics, a transition spectrum section between a reflection spectrum section and a transmission spectrum section in the spectral characteristics corresponds to the lightless waveband, and the first dichroic mirror separates the light beam emitted by the laser fluorescence light source into first colored light and second colored light by means of the spectral characteristics. According to the projector provided by the present application, a set spectrum of the first dichroic mirror corresponds to the lightless waveband of the laser fluorescence light beam, so that the influence of spectrum drift on an actual light splitting result is reduced, the monochromatic field uniformity of the first colored light after light splitting is ensured, and the color of the light beam transmitted by the projector is more uniform.

Description

投影仪projector 技术领域Technical field
本发明涉及显示技术领域，具体而言，涉及一种投影仪。The present invention relates to the field of display technology, in particular to a projector.
背景技术Background technique
在投影技术领域中，液晶显示投影机采用3片式High Temperature Poly Silicon(高温多晶硅，简称HTPS)LCD液晶板，简称3LCD投影机，***通常将光源产生的白光分成RGB(红、绿、蓝)单色光分别经过对应的RGB液晶显示面板调制后再通过合光棱镜合成白光进入镜头，而二向色片上的分色薄膜为光学干涉薄膜，分光后的色光的光谱特性随着入射光线的角度变化而变化，如图1所示，当光线入射角越大，光谱的半功率波长(透过率为50％的点)越往短波漂移，因此，分光后的色光的单色场不均会很严重。In the field of projection technology, the liquid crystal display projector uses a 3-chip High Temperature Poly Silicon (HTPS) LCD liquid crystal panel, or 3LCD projector for short. The system usually divides the white light generated by the light source into RGB (red, green, blue) The monochromatic light is respectively modulated by the corresponding RGB liquid crystal display panel, and then enters the lens through the light combining prism to synthesize white light. The dichroic film on the dichroic film is an optical interference film. The spectral characteristics of the divided color light vary with the angle of the incident light. As shown in Figure 1, when the angle of incidence of light increases, the half-power wavelength of the spectrum (the point where the transmittance is 50%) shifts toward the shorter wave. Therefore, the unevenness of the monochromatic field of the split color light will be Very serious.
发明内容Summary of the invention
本发明实施例提出了一种投影仪，以解决以上问题。The embodiment of the present invention proposes a projector to solve the above problems.
本发明实施例通过以下技术方案来实现上述目的。The embodiments of the present invention achieve the above objectives through the following technical solutions.
本发明实施例提供一种投影仪，包括激光荧光光源和分色光学***，激光荧光光源所发出的光束形成不连续光谱，不连续光谱包括相互分离的第一波段和第二波段，第一波段和第二波段之间形成无光波段，分色光学***，所述分色光学***包括第一分色镜，所述第一分色镜具有设定光谱特性，所述光谱特性中反射光谱段和透射光谱段之间的过渡光谱段位于所述无光波段，所述第一分色镜通过所述光谱特性将所述激光荧光光源所发出的光束分离为第一色光和第二色光，其中，所述第一色光与所述第一波段对应，所述第二 色光与所述第二波段对应。The embodiment of the present invention provides a projector including a laser fluorescent light source and a dichroic optical system. The light beam emitted by the laser fluorescent light source forms a discontinuous spectrum. The discontinuous spectrum includes a first waveband and a second waveband that are separated from each other. The first waveband A non-light band is formed between the second band and a dichroic optical system. The dichroic optical system includes a first dichroic mirror. The first dichroic mirror has a set spectral characteristic. The transition spectrum section between the transmission spectrum section and the transmission spectrum section is located in the non-light band, and the first dichroic mirror separates the light beam emitted by the laser fluorescent light source into the first color light and the second color light through the spectral characteristics, Wherein, the first color light corresponds to the first wavelength band, and the second color light corresponds to the second wavelength band.
在一些实施例中，无光波段的波长范围在470nm～490nm之间。In some embodiments, the wavelength range of the non-optical band is between 470 nm and 490 nm.
在一些实施例中，第一色光为蓝光。In some embodiments, the first color light is blue light.
在一些实施例中，投影仪还包括第二分色镜，第二分色镜位于第二色光所形成的光路，用于将第二色光分离为第三色光和第四色光。In some embodiments, the projector further includes a second dichroic mirror, which is located in the light path formed by the second color light, and is used to separate the second color light into the third color light and the fourth color light.
在一些实施例中，第三色光为红光，第四色光为绿光，第三色光所形成的光路长度大于第四色光所形成的光路长度。In some embodiments, the third color light is red light, the fourth color light is green light, and the light path length formed by the third color light is greater than the light path length formed by the fourth color light.
在一些实施例中，投影仪还包括第一聚光透镜，第一聚光透镜设于第二色光所形成的光路，且位于第一分色镜和第二分色镜之间，以使第二色光在第二分色镜处形成远心光路。In some embodiments, the projector further includes a first condenser lens. The first condenser lens is arranged on the optical path formed by the second color light and is located between the first dichroic mirror and the second dichroic mirror, so that the The dichroic light forms a telecentric light path at the second dichroic mirror.
在一些实施例中，投影仪还包括光调制***，光调制***包括第一调制部、第二调制部以及第三调制部，第一调制部设于第一色光所形成的光路，第二调制部设于第三色光所形成的光路，第三调制部设于第四色光所形成的光路。In some embodiments, the projector further includes a light modulation system. The light modulation system includes a first modulation section, a second modulation section, and a third modulation section. The modulation part is arranged in the optical path formed by the third color light, and the third modulation part is arranged in the optical path formed by the fourth color light.
在一些实施例中，投影仪还包括第二聚光透镜，第二聚光透镜设于第一色光所形成的光路，第二聚光透镜设于第一分色镜和第一调制部之间。In some embodiments, the projector further includes a second condenser lens, the second condenser lens is arranged on the optical path formed by the first color light, and the second condenser lens is arranged between the first dichroic mirror and the first modulation part. between.
在一些实施方式中，投影仪还包括第三聚光透镜，第三聚光透镜设于第三色光所形成的光路，第三聚光透镜位于第二分色透镜和第三调制部之间。In some embodiments, the projector further includes a third condenser lens, the third condenser lens is arranged on the optical path formed by the third color light, and the third condenser lens is located between the second dichroic lens and the third modulation part.
在一些实施方式中，投影仪还包括至少两个中继透镜，两个中继透镜设于第三色光所形成的光路。In some embodiments, the projector further includes at least two relay lenses, and the two relay lenses are arranged on the optical path formed by the third color light.
在一些实施方式中，投影仪还包括第一透镜阵列、第二透镜阵列以及第四聚光透镜，第一透镜阵列、第二透镜阵列以及第四聚光透镜依次设于激光荧光光源与第一分色镜之间，第一透镜阵列用于将激光荧光光源所射出的光源光分隔为多个部分光束；第二透镜阵列用于将所述多个部分光束进行聚光。In some embodiments, the projector further includes a first lens array, a second lens array, and a fourth condenser lens. The first lens array, the second lens array, and the fourth condenser lens are sequentially arranged on the laser fluorescent light source and the first condenser lens. Between the dichroic mirrors, the first lens array is used to divide the light source light emitted by the laser fluorescent light source into a plurality of partial beams; the second lens array is used to condense the plurality of partial beams.
在一些实施方式中，第一调制部、所述第二调制部以及第三调制部均为液晶显示器。In some embodiments, the first modulation section, the second modulation section, and the third modulation section are all liquid crystal displays.
在一些实施方式中，投影仪还包括偏光转换***，偏光转换***设于激 光荧光光源和第一分色镜之间，偏光转换***用于将激光荧光光源发出的光束转换为偏振光。In some embodiments, the projector further includes a polarization conversion system, which is arranged between the laser fluorescent light source and the first dichroic mirror, and the polarization conversion system is used to convert the light beam emitted by the laser fluorescent light source into polarized light.
在一些实施方式中，第一调制部、第二调制部以及第三调制部中每个包括液晶面板和两个偏振滤光器，液晶面板位于两个偏振滤光器之间。In some embodiments, each of the first modulation section, the second modulation section, and the third modulation section includes a liquid crystal panel and two polarizing filters, and the liquid crystal panel is located between the two polarizing filters.
在一些实施方式中，投影仪还包括反射透镜，反射透镜设于第三色光所形成的光路以使第三色光所形成的光路弯折。In some embodiments, the projector further includes a reflective lens, and the reflective lens is arranged on the optical path formed by the third color light so as to bend the optical path formed by the third color light.
在一些实施方式中，投影仪包括至少两个中继透镜，至少两个所述中继透镜均设于所述第三色光所形成的光路。In some embodiments, the projector includes at least two relay lenses, and at least two of the relay lenses are both arranged on the optical path formed by the third color light.
本发明提供的投影仪通过使第一分色镜的反射光谱段和透射光谱段之间的过渡光谱段位于待分离光束的无光波段，减少第一色光的光谱的漂移对实际分光结果的影响，保证了分光后第一色光的单色场均匀性，使得投影仪透射或反射出的光束的颜色更加地均匀。The projector provided by the present invention makes the transition spectral section between the reflection spectral section and the transmission spectral section of the first dichroic mirror located in the non-light band of the light beam to be separated, thereby reducing the influence of the drift of the first color light spectrum on the actual spectroscopic result. The influence ensures the uniformity of the monochromatic field of the first color light after light splitting, so that the color of the light beam transmitted or reflected by the projector is more uniform.
附图说明Description of the drawings
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to explain the technical solutions in the embodiments of the present invention more clearly, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.
图1是本发明实施例提供的一款现有投影仪的二向色片的P光透过率-波长的关系示意图；FIG. 1 is a schematic diagram of the relationship between P light transmittance and wavelength of a dichroic plate of an existing projector according to an embodiment of the present invention;
图2是本发明实施例提供的投影仪的结构光路示意图；2 is a schematic diagram of a structural light path of a projector provided by an embodiment of the present invention;
图3是本发明实施例提供的投影仪的激光荧光光源的光谱和第一分色镜的反射光谱示意图；3 is a schematic diagram of the spectrum of the laser fluorescent light source of the projector and the reflection spectrum of the first dichroic mirror according to an embodiment of the present invention;
图4是本发明实施例提供的投影仪的激光荧光光源至第二分色镜的结构光路示意图。4 is a schematic diagram of a structural light path from a laser fluorescent light source of a projector to a second dichroic mirror according to an embodiment of the present invention.
具体实施方式Detailed ways
为了使本技术领域的人员更好地理解本发明方案，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the protection scope of the present invention.
请参阅图2，本发明实施例提供一种投影仪100，该投影仪100可采用3片式H igh Temperature Poly Silicon(高温多晶硅，以下简称HTPS)的LCD液晶显示板，简称3LCD投影仪。Referring to FIG. 2, an embodiment of the present invention provides a projector 100. The projector 100 may use a 3-chip LCD liquid crystal display panel of High Temperature Poly Silicon (High Temperature Polysilicon, hereinafter referred to as HTPS), referred to as a 3LCD projector.
3LCD投影仪采用的光学***能够将激光荧光光源10发出的白光光分解成R(红)、G(绿)、B(蓝)三种颜色的色光，三种色光分别透过各自对应的液晶显示板并经过投影镜头投射出图像。采用3LCD投影仪所投射出的图像具有光线明亮自然、柔和等特点，这样的光不会伤害观看者的眼睛。The optical system used by the 3LCD projector can decompose the white light emitted by the laser fluorescent light source 10 into three colors of R (red), G (green), and B (blue), which are transmitted through their respective liquid crystal displays. Board and project the image through the projection lens. The image projected by the 3LCD projector has the characteristics of bright, natural and soft light, so that the light will not harm the eyes of the viewer.
投影仪100包括激光荧光光源10和分色光学***20，激光荧光光源10所发出的光束形成不连续光谱，不连续光谱包括相互分离的第一波段W1和第二波段W3，第一波段W1和第二波段W3之间形成无光波段W2，分色光学***20包括第一分色镜21，第一分色镜21用于将激光荧光光源10所发出的光束分离为第一色光LB和第二色光LY，第一色光LB与第一波段W1对应，第二色光LY与第二波段W3对应。The projector 100 includes a laser fluorescent light source 10 and a dichroic optical system 20. The light beam emitted by the laser fluorescent light source 10 forms a discontinuous spectrum. The discontinuous spectrum includes a first waveband W1 and a second waveband W3 that are separated from each other. A light-free wavelength band W2 is formed between the second wavelength band W3. The dichroic optical system 20 includes a first dichroic mirror 21. The first dichroic mirror 21 is used to separate the light beam emitted by the laser fluorescent light source 10 into the first color light LB and The second color light LY, the first color light LB corresponds to the first waveband W1, and the second color light LY corresponds to the second waveband W3.
在一个实施例中，第一分色镜21通过镀膜工艺实现设定光谱特性，该光谱特性表现为：光谱特性中的反射光谱段和透射光谱段之间的过渡光谱段与激光荧光光源中的无光波段W2相对应，以使得激光荧光光束经过第一分色镜21分光后，第一波段W1和第二波段W3对应的光束被分离。In one embodiment, the first dichroic mirror 21 achieves the set spectral characteristics through a coating process, and the spectral characteristics are expressed as: the transition between the reflection and transmission spectrum in the spectral characteristics and the transition spectrum in the laser fluorescent light source The non-optical wavelength band W2 corresponds, so that after the laser phosphor beam is split by the first dichroic mirror 21, the light beams corresponding to the first wavelength band W1 and the second wavelength band W3 are separated.
本发明提供的投影仪100通过将第一分色透镜21的反射光谱段与透镜光谱段之间的过渡光谱段位于无光波段W3，如图3所示，激光荧光光束的第一波段W1完全位于第一分色镜21的反射光谱段，激光荧光光束的第二波段W3完全位于第一分色镜21的透射光谱段。The projector 100 provided by the present invention locates the transition spectral range between the reflection spectral range of the first dichroic lens 21 and the lens spectral range in the non-optical wavelength band W3. As shown in FIG. 3, the first wavelength band W1 of the laser fluorescent beam is completely Located in the reflection spectrum section of the first dichroic mirror 21, the second wavelength band W3 of the laser fluorescent beam is completely located in the transmission spectrum section of the first dichroic mirror 21.
优选的，第一分色镜21的反射光谱段包括激光荧光光束的第一波段W1 和预留波段，第一分色镜21的透射光谱段包括激光荧光光束的第二波段W3和预留波段。通过无光光谱段的存在以及第一分色镜21的过渡光谱段与无光光谱段相对应，实现预留波段。由于第一分色透镜21的光谱会随着入射角的大小发生漂移，会影响第一色光LB或者第二色光LY的单色场的均匀性，通过将第一分色透镜21的反射光谱与透镜光谱之间的过渡光谱位于无光波段W2，也即落在第一波段W1和第二波段W3之间，这样由于无光波段W2的存在，即使发生一定的偏移不会影响第一波段W1和第二波段W3所对应的色光，因此，并不会对分光后的色光产生影响，也即第一分色镜21光谱的漂移对实际分光结果的没有影响，保证了分光后第一色光LB的单色场均匀性，使得投影仪100投射出的光束的颜色更加地均匀。Preferably, the reflection spectrum band of the first dichroic mirror 21 includes the first wavelength band W1 and reserved wavelength band of the laser fluorescent beam, and the transmission spectrum band of the first dichroic mirror 21 includes the second wavelength band W3 and reserved wavelength band of the laser fluorescent beam. . Through the existence of the non-light spectral band and the transitional spectral band of the first dichroic mirror 21 corresponding to the non-light spectral band, the reserved band is realized. Since the spectrum of the first dichroic lens 21 will drift with the size of the incident angle, it will affect the uniformity of the monochromatic field of the first color light LB or the second color light LY, by changing the reflection spectrum of the first dichroic lens 21 The transition spectrum with the lens spectrum is located in the non-light band W2, that is, falls between the first wave band W1 and the second wave band W3. In this way, due to the existence of the non-light wave band W2, even a certain shift will not affect the first wave. The color light corresponding to the wavelength band W1 and the second wavelength band W3, therefore, will not affect the color light after the light splitting, that is, the shift of the spectrum of the first dichroic mirror 21 has no effect on the actual light splitting result, which ensures the first light after the light splitting. The uniformity of the monochromatic field of the color light LB makes the color of the light beam projected by the projector 100 more uniform.
请参阅图2，在本实施例中，分色光学***20还包括第二分色透镜22，第二分色透镜22设于第二色光LY所形成的光路，以将第二色光LY分离为第三色光LR和第四色光LG。Referring to FIG. 2, in this embodiment, the dichroic optical system 20 further includes a second dichroic lens 22, which is arranged on the optical path formed by the second color light LY to separate the second color light LY into The third color light LR and the fourth color light LG.
在本实施例中，第一分色镜21和第二分色镜22均为二向色镜，二向色镜对一定波长的光几乎完全透过，而对另一些波长的光几乎完全反射。第一分色镜21和第二分色镜22均为平面玻璃，第一分色镜21和第二分色镜22平行设置，且第一分色镜21和第二分色镜22的入光面均与激光荧光光源10的出射光路LP相交。作为一种示例：第一分色镜21的入光面与出射光路LP所形成的夹角小于90°。由于第一色光LB的反射光谱随着光源的入射角大小而漂移，从图3可以看出，反射光谱落入无光波段W3，反射光谱的漂移范围位于无光波段W3，而不会落于第一波段W1或第二波段W2，使得反射光谱的漂移对实际的分光结果不会产生影响，保证了分光后第一色光LB的单色场的均匀性，进而使得投影仪100透射出的更加均匀的白光。In this embodiment, the first dichroic mirror 21 and the second dichroic mirror 22 are both dichroic mirrors. The dichroic mirrors almost completely transmit light of a certain wavelength, but almost completely reflect light of other wavelengths. . The first dichroic mirror 21 and the second dichroic mirror 22 are both flat glass, the first dichroic mirror 21 and the second dichroic mirror 22 are arranged in parallel, and the entrance of the first dichroic mirror 21 and the second dichroic mirror 22 The light surfaces all intersect with the exit light path LP of the laser fluorescent light source 10. As an example: the angle formed by the light incident surface of the first dichroic mirror 21 and the light output path LP is less than 90°. Since the reflection spectrum of the first color light LB drifts with the incident angle of the light source, it can be seen from Fig. 3 that the reflection spectrum falls into the non-light band W3, and the drift range of the reflection spectrum lies in the non-light band W3, but does not fall. In the first waveband W1 or the second waveband W2, the drift of the reflection spectrum will not affect the actual spectroscopy results, and the uniformity of the monochromatic field of the first color light LB after spectroscopy is ensured, so that the projector 100 transmits The more uniform white light.
在本实施例中，第一分色镜21为反蓝透黄二向分色镜，第二分色镜22为反绿透红二向分色镜，当激光荧光光源10的光束射向第一分色镜21后被分离为蓝光和黄色，即第一色光LB为蓝光，第二色光LY为黄光，其中黄光透过第一分色镜21，蓝光被第一分色镜21反射。如图3所示，在本实施例 中，第一波段W1的波段范围大致在440nm～470nm之间，第二波段W2的波段范围大致在490nm～690nm之间。从图3中可以看出，在第一波段W1与第二波段W2之间的波段基本没有光强度，也就是在此波段没有对应的色光，这一段无光的波段为无光波段W3，该无光波段W3的波段范围大致在470nm～490nm之间，也即无光波段W3位于蓝光和黄光的波段之间。In this embodiment, the first dichroic mirror 21 is an anti-blue, transparent and yellow dichroic mirror, and the second dichroic mirror 22 is an anti-green, transparent and red dichroic mirror. When the light beam of the laser fluorescent light source 10 is directed toward the first After a dichroic mirror 21 is separated into blue and yellow, that is, the first color light LB is blue light, and the second color light LY is yellow light. The yellow light passes through the first dichroic mirror 21 and the blue light is passed through the first dichroic mirror 21. reflection. As shown in FIG. 3, in this embodiment, the wavelength range of the first waveband W1 is approximately between 440 nm and 470 nm, and the waveband range of the second waveband W2 is approximately between 490 nm and 690 nm. It can be seen from Figure 3 that there is basically no light intensity in the wavelength band between the first waveband W1 and the second waveband W2, that is, there is no corresponding color light in this waveband, and this lightless waveband is the lightless waveband W3. The wavelength range of the non-light band W3 is roughly between 470 nm and 490 nm, that is, the non-light band W3 is located between the blue and yellow light bands.
在本实施例中，第一分色镜21包括入射面S1，第一色光LB经入射面S1反射，入射面S1镀有功能层，通过在入射面S1镀有功能层可以使得第一色光LB形成的反射光谱落在无光波段W3，使得第一色光LB的反射光谱未落在第一波段W1和第二波段W2，以实现分光后的第一色光LB的单色场的均匀性。作为一种示例：该功能层可以是多层反射偏振膜，例如：功能层可以是各向同性与双折射材料的交替层所形成的膜；功能层可以使用按各种厚度分布的光学厚度，例如：功能层中的一者或两者的厚度分布可以是单调变化。也即是说，光学重复单元的厚度沿多层反射偏振膜的厚度表现出连续减少或连续增大的趋势(例如光学重复单元的厚度不会表现出沿多层膜的部分厚度增大的趋势而沿多层膜的另一部分厚度减小的趋势)。功能层可包括包含一个或多个波带包的厚度分布。一个波带包是具有某一层厚范围的多层堆叠结构，使得该多层堆叠结构反射宽带波长。例如，蓝波带包可具有某一光学厚度分布，使得它反射蓝光，即约400nm至500nm。在此，不对功能层的具体结构和材料作出限定，只要该功能层能够使得第一色光LB的反射光谱落在无光波段W3内即可。In this embodiment, the first dichroic mirror 21 includes an incident surface S1, the first color light LB is reflected by the incident surface S1, the incident surface S1 is plated with a functional layer, and the incident surface S1 is plated with a functional layer to make the first color light The reflection spectrum formed by the light LB falls in the no-light wavelength band W3, so that the reflection spectrum of the first color light LB does not fall in the first wavelength band W1 and the second wavelength band W2, so as to realize the monochromatic field of the first color light LB after the splitting. Uniformity. As an example: the functional layer can be a multilayer reflective polarizing film, for example: the functional layer can be a film formed by alternating layers of isotropic and birefringent materials; the functional layer can use optical thicknesses distributed in various thicknesses, For example, the thickness distribution of one or both of the functional layers may change monotonously. In other words, the thickness of the optical repeating unit shows a continuous decrease or continuous increase along the thickness of the multilayer reflective polarizing film (for example, the thickness of the optical repeating unit does not show a tendency to increase along the part of the multilayer film. And along the other part of the multilayer film thickness reduction trend). The functional layer may include a thickness distribution including one or more band packets. A band packet is a multilayer stack structure with a certain layer thickness range, so that the multilayer stack structure reflects broadband wavelengths. For example, the blue wave band packet may have a certain optical thickness distribution such that it reflects blue light, that is, about 400 nm to 500 nm. Here, the specific structure and material of the functional layer are not limited, as long as the functional layer can make the reflection spectrum of the first color light LB fall within the non-light wavelength band W3.
请再次参阅图2，在本实施例中，投影仪100包括第一透镜阵列31、第二透镜阵列32，第一透镜阵列31、第二透镜阵列32依次设于激光荧光光源10与第一分色镜21之间，第一透镜阵列31用于将激光荧光光源10所射出的光源光分隔为多个部分光束；第二透镜阵列32用于将多个部分光束进行聚光。Please refer to FIG. 2 again. In this embodiment, the projector 100 includes a first lens array 31 and a second lens array 32. The first lens array 31 and the second lens array 32 are arranged in the laser fluorescent light source 10 and the first sub Between the color mirrors 21, the first lens array 31 is used to divide the light source light emitted by the laser fluorescent light source 10 into a plurality of partial beams; the second lens array 32 is used to condense the plurality of partial beams.
第一透镜阵列31设有多个第一微型透镜(图未示)，其中多个第一微型透镜呈阵列分布于第一透镜阵列31的入光面或者出光面中的至少一者，第 二透镜阵列32设置有多个第二微型透镜(图未示)，多个第二微型透镜呈阵列分布于第二透镜阵列32的入光面或者出光面中的至少一者。多个微型透镜可以呈矩形阵列、椭圆形阵列或者其他形状的阵列排布。通过设置第一透镜阵列31和第二透镜阵列32入射光分割和重合，使得该***的图像形成区域的内照度大致均匀化。The first lens array 31 is provided with a plurality of first microlenses (not shown), wherein the plurality of first microlenses are arranged in an array on at least one of the light-incident surface or the light-exit surface of the first lens array 31, and the second The lens array 32 is provided with a plurality of second microlenses (not shown), and the plurality of second microlenses are distributed in an array on at least one of the light incident surface or the light exit surface of the second lens array 32. The multiple micro lenses can be arranged in a rectangular array, an elliptical array, or an array of other shapes. By arranging the first lens array 31 and the second lens array 32 to divide and overlap the incident light, the internal illuminance of the image forming area of the system is substantially uniform.
在本实施例中，如图4所示，投影仪100还包括第一聚光透镜41，第一聚光透镜41设于第二色光LY所形成的光路，且位于第一分色镜21和第二分色镜22之间，以使第二色光LY在第二分色镜22处形成远心光路，其中，第一聚光透镜41的数量可以为1个、2个或者多个，作为一种示例，至少两个第一聚光透镜41设于第二色光LY形成的光路，且均位于第一分色镜21和第二分色镜22之间，两个第一聚光透镜41用于实现被第一透镜阵列31分割后光束的重叠和远心的功能。In this embodiment, as shown in FIG. 4, the projector 100 further includes a first condensing lens 41. The first condensing lens 41 is arranged on the optical path formed by the second color light LY, and is located between the first dichroic mirror 21 and Between the second dichroic mirrors 22, so that the second color light LY forms a telecentric optical path at the second dichroic mirror 22, wherein the number of the first condenser lens 41 can be one, two or more, as In an example, at least two first condenser lenses 41 are provided on the optical path formed by the second color light LY, and are both located between the first dichroic mirror 21 and the second dichroic mirror 22, and the two first condenser lenses 41 It is used to realize the functions of overlapping and telecentricity of the beams divided by the first lens array 31.
两个第一聚光透镜41可以是双凸镜或者单凸镜，其中，两个第一聚光透镜41的入射面可以是非球面或者球面，第一聚光透镜41可以是低折射率、低分散的玻璃透镜，第一聚光透镜41所射出的光束在第一分色镜21处形成远心光路，经第二透镜阵列32发出的任何一束光线入射于第一分色镜21的不同位置的入射角都是相同的，由于光学入射角越大，光谱的半功能波长越往短波漂，而该光束LY1的入射角等于光束LY2的入射角是否相等会影响该***白光的均匀性，通过设置两个第一聚光透镜41，使得光束LY1的入射角等于光束LY2的入射角大致相等，因此，第二色光LY分光后形成的第四色光LG的色坐标的差异性小，保证了第三色光LR和第四色光LG的单色场均匀性，使得投影仪100透射出的白光颜色更加的均匀。The two first condenser lenses 41 can be biconvex lenses or single-convex lenses. The incident surfaces of the two first condenser lenses 41 can be aspherical or spherical, and the first condenser lenses 41 can be of low refractive index and low refractive index. Dispersed glass lens, the light beam emitted by the first condenser lens 41 forms a telecentric optical path at the first dichroic mirror 21, and any light beam emitted by the second lens array 32 is incident on the first dichroic mirror 21. The incident angles of the positions are all the same, because the larger the optical incident angle, the more the half-functional wavelength of the spectrum drifts toward shorter wavelengths, and whether the incident angle of the beam LY1 is equal to the incident angle of the beam LY2 will affect the uniformity of the white light of the system. By arranging two first condenser lenses 41, the incident angle of the light beam LY1 is equal to the incident angle of the light beam LY2. Therefore, the difference in the color coordinates of the fourth color light LG formed after the second color light LY is split is small, which ensures that The uniformity of the monochromatic field of the third color light LR and the fourth color light LG makes the color of the white light transmitted by the projector 100 more uniform.
第一聚光透镜41是双凸透镜时，可以减少球面像侧。另外，第一聚光透镜41的入射面和出射面的曲率可以相同或者不同，具体可以根据实际需求进行调整。在一些实施方式中，两个第一聚光透镜41相互粘接形成粘合体，以减少两个第一聚光透镜41之间的间距。通过设置两个第一聚光透镜41可以进一步对入射的光束进行聚光，提高光强。When the first condenser lens 41 is a biconvex lens, the spherical image side can be reduced. In addition, the curvature of the incident surface and the exit surface of the first condenser lens 41 may be the same or different, and may be adjusted according to actual requirements. In some embodiments, the two first condenser lenses 41 are bonded to each other to form an adhesive body, so as to reduce the distance between the two first condenser lenses 41. By providing two first condensing lenses 41, the incident light beam can be further condensed and the light intensity can be increased.
在本实施例中，投影仪100还包括第二聚光透镜42，第二聚光透镜42的数量可以为1个、2个或者多个，作为一种示例，至少两个第二聚光透镜42设于反射镜与第一分色镜21之间，两个第二聚光透镜42可以是双凸镜或单凸镜，其中，两个第二聚光透镜42的入射面可以是非球面或者球面，第二聚光透镜42可以是低折射率、低分散的玻璃透镜。通过设置两个第二聚光透镜42可以更多地聚集入射的光束，提高光强。通过第二聚光透镜42可以使第二色光LY更加均匀化。In this embodiment, the projector 100 further includes a second condenser lens 42, and the number of the second condenser lens 42 may be one, two or more. As an example, at least two second condenser lenses 42 is provided between the reflecting mirror and the first dichroic mirror 21. The two second condenser lenses 42 can be double-convex lenses or single-convex lenses. The incident surfaces of the two second condenser lenses 42 can be aspherical or With a spherical surface, the second condenser lens 42 may be a glass lens with low refractive index and low dispersion. By arranging two second condensing lenses 42, the incident light beams can be collected more and the light intensity can be increased. The second condensing lens 42 can make the second color light LY more uniform.
在本实施例中，投影仪100还包括第三聚光透镜44，第三聚光透镜44的数量可以为1个、2个或者多个，第三聚光透镜44设于第三色光LR的光路。第三聚光透镜44的入射面可以是非球面或者球面，第三聚光透镜44可以是低折射率、低分散的玻璃透镜。通过设置第三聚光透镜44可以更多地聚集入射的光束，提高光强。通过第三聚光透镜44可以使第三色光LR更加均匀化。In this embodiment, the projector 100 further includes a third condenser lens 44, the number of the third condenser lens 44 can be one, two or more, and the third condenser lens 44 is set on the third color light LR. Light path. The incident surface of the third condenser lens 44 may be an aspheric surface or a spherical surface, and the third condenser lens 44 may be a glass lens with low refractive index and low dispersion. By setting the third condenser lens 44, the incident light beams can be collected more and the light intensity can be increased. The third condensing lens 44 can make the third color light LR more uniform.
在一些实施方式中，投影仪100还包括第四聚光透镜45(如图2所示)，第一透镜阵列31、第二透镜阵列32以及第四聚光透镜45依次设于激光荧光光源10与第一分色镜21之间，第四聚光透镜45的入射面可以是非球面或者球面，第四聚光透镜45可以是低折射率、低分散的玻璃透镜。通过设置第四聚光透镜45可以更多地聚集入射的光束，提高光强。In some embodiments, the projector 100 further includes a fourth condenser lens 45 (as shown in FIG. 2). The first lens array 31, the second lens array 32, and the fourth condenser lens 45 are sequentially arranged on the laser fluorescent light source 10 Between the first dichroic mirror 21, the incident surface of the fourth condenser lens 45 may be an aspheric surface or a spherical surface, and the fourth condenser lens 45 may be a glass lens with low refractive index and low dispersion. By arranging the fourth condenser lens 45, the incident light beams can be collected more and the light intensity can be increased.
在一些实施方中，投影仪100还可以包括至少两个中继透镜43，两个中继透镜43可以设置于光路长度最长的光路上，作为一种示例：第三色光LR的光路长度大于第一色光LB、第二色光LY以及第四色光LG的光路长度，两个中继透镜43可以均设于第三色光LR的光路上，可以防止因光的漫射等而引起的光利用效率下降。此外，中继透镜43的数量也可以为1个或多个。In some embodiments, the projector 100 may further include at least two relay lenses 43. The two relay lenses 43 may be arranged on the optical path with the longest optical path length. As an example, the optical path length of the third color light LR is greater than For the optical path lengths of the first color light LB, the second color light LY, and the fourth color light LG, the two relay lenses 43 can be arranged on the optical path of the third color light LR, which can prevent light utilization caused by light diffusion, etc. The efficiency drops. In addition, the number of relay lenses 43 may be one or more.
请参阅图2，在本实施例中，投影仪100还包括偏光转换***33，偏光转换***33设于激光荧光光源10和第一分色镜21之间，偏光转换***33用于将激光荧光光源10发出的光束转换为偏振光。具体地，偏光转换***33设置于第一透镜阵列31和第一分色镜21之间。偏光转换***33具有将 第一透镜阵列31分隔出的各部分光束的偏振方向调整为一个方向的直线偏振光的作用。偏光转换***33包括偏振分离膜以及反射镜，偏振分离膜以及反射镜在与激光荧光光源10的出射光路LP垂直的方向按预定的间隔交替排列设置，其中偏振分离膜透射各部分光束中包含的P偏振光及S偏振光之中的一种偏振光(例如P偏振光)，反射另一种偏振光(例如S偏振光)，被反射的另一种偏振光(例如S偏振光)由相邻的反射镜进行弯折，按一种偏振光(例如P偏振光)的射出方向、也就是按沿激光荧光光源10的出射光路LP射出。Referring to FIG. 2, in this embodiment, the projector 100 further includes a polarization conversion system 33. The polarization conversion system 33 is provided between the laser phosphor light source 10 and the first dichroic mirror 21. The polarization conversion system 33 is used to convert the laser phosphor The light beam emitted by the light source 10 is converted into polarized light. Specifically, the polarization conversion system 33 is disposed between the first lens array 31 and the first dichroic mirror 21. The polarization conversion system 33 has the function of adjusting the polarization direction of each partial light beam separated by the first lens array 31 to one direction of linearly polarized light. The polarization conversion system 33 includes a polarization separation film and a reflector. The polarization separation film and the reflector are alternately arranged at predetermined intervals in a direction perpendicular to the exit light path LP of the laser fluorescent light source 10, wherein the polarization separation film transmits each part of the light beam containing One of the P-polarized light and S-polarized light (such as P-polarized light) reflects the other polarized light (such as S-polarized light), and the reflected other polarized light (such as S-polarized light) is Adjacent mirrors are bent and emitted according to the emission direction of one kind of polarized light (for example, P-polarized light), that is, according to the emission light path LP along the laser fluorescent light source 10.
在本实施例中，投影仪100还包括光调制***50，光调制***50包括第一调制部51、第二调制部52以及第三调制部53，第一调制部51设于第一色光LB的光路，第二调制部52设于第三色光LR的光路，第三调制部53设于第四色光LG的光路。其中，第一调制部51、第二调制部52以及第三调制部53均为液晶显示器(Liquid Crystal Display，简称LCD)，第一调制部51、第二调制部52以及第三调制部53中每个包括液晶面板54和两个偏振滤光器55，液晶面板54位于两个偏振滤光器55之间。其中，各液晶面板54在一对透明的玻璃基板间密封封入了作为电光物质的液晶，例如将多晶硅TFT作为开关元件，按照所提供的图像信号，来调制对各自所入射的偏振光的偏振方向。其中，第二聚光透镜42设于第一分色镜21和第一调制部51之间，第三聚光透镜44设于第二分色透镜22和第三调制部53之间。In this embodiment, the projector 100 further includes a light modulation system 50. The light modulation system 50 includes a first modulation section 51, a second modulation section 52, and a third modulation section 53, and the first modulation section 51 is set in the first color light. In the optical path of the LB, the second modulation section 52 is provided in the optical path of the third color light LR, and the third modulation section 53 is provided in the optical path of the fourth color light LG. Among them, the first modulation section 51, the second modulation section 52, and the third modulation section 53 are all liquid crystal displays (LCDs for short), and the first modulation section 51, the second modulation section 52, and the third modulation section 53 Each includes a liquid crystal panel 54 and two polarizing filters 55, and the liquid crystal panel 54 is located between the two polarizing filters 55. Among them, each liquid crystal panel 54 is sealed between a pair of transparent glass substrates as an electro-optical material liquid crystal, for example, a polysilicon TFT is used as a switching element to modulate the polarization direction of each incident polarized light according to the provided image signal . Among them, the second condenser lens 42 is provided between the first dichroic mirror 21 and the first modulation section 51, and the third condenser lens 44 is provided between the second dichroic lens 22 and the third modulation section 53.
各液晶面板54可以是非发光且透射型的光调制装置，用来使所入射的色光的偏振方向的空间分布产生变化。对各液晶面板54分别所入射的各色光相应于给各液晶面板54作为电信号所输入的驱动信号或控制信号，以像素为单位调整偏振状态。此时，利用偏振滤光器55来调整向各液晶面板54入射的照明光的偏振方向，并且利用偏振滤光器55从由各液晶面板54射出的光取出预定的偏振方向的调制光。Each liquid crystal panel 54 may be a non-luminous and transmissive light modulation device for changing the spatial distribution of the polarization direction of the incident colored light. Each color light incident on each liquid crystal panel 54 corresponds to a drive signal or a control signal input as an electric signal to each liquid crystal panel 54, and the polarization state is adjusted in units of pixels. At this time, the polarization filter 55 is used to adjust the polarization direction of the illumination light incident on each liquid crystal panel 54, and the polarization filter 55 extracts modulated light in a predetermined polarization direction from the light emitted from each liquid crystal panel 54.
在本实施例中，投影仪100还包括光合成***60，第一色光LB、第三色光LR以及第四色光LG分别射入光合成***60合成以形成彩色图像。光 合成***60包括十字分色棱镜，基于从偏振滤光器55所射出的各色光的每种调制后的光学图像合成彩色图像。十字分色棱镜包括四个相互粘合的直角棱镜，相邻两个直角棱镜的直角边相互粘接，在粘合直角棱镜之间的界面，形成按X状交叉的一对多层电介质膜61、62。其中一方的多层电介质膜61反射红光，另一方的多层电介质膜62反射蓝色光。由十字分色棱镜合成后的像光经过作为放大投影镜头，以适当的放大率向屏幕(未图示)作为彩色图像进行投影。In this embodiment, the projector 100 further includes a light synthesis system 60, and the first color light LB, the third color light LR, and the fourth color light LG are respectively injected into the light synthesis system 60 and synthesized to form a color image. The light synthesis system 60 includes a cross dichroic prism, and a color image is synthesized based on each modulated optical image of each color light emitted from the polarization filter 55. The cross dichroic prism includes four mutually bonded right-angle prisms. The right-angle sides of two adjacent right-angle prisms are bonded to each other. At the interface between the bonded right-angle prisms, a pair of multilayer dielectric films 61 crossing in an X shape are formed , 62. One of the multilayer dielectric films 61 reflects red light, and the other multilayer dielectric film 62 reflects blue light. The image light synthesized by the cross dichroic prism is used as a magnifying projection lens, and is projected as a color image on a screen (not shown) at an appropriate magnification.
在一些实施方式中，投影仪100还包括反射透镜70，反射透镜70可以设置在色光所形成的光路上以使光路弯折。作为一种示例：反射透镜70可以设置于第三色光LR的光路上，以对第三色光LR的光路进行弯折。例如，两个反射透镜70可以相对间隔设置于第三色光LR的光路上，以对第三色光LR的光路进行两次反射以两次弯折光路，两个反射透镜70的反射面之间形成一定的夹角，夹角可以小于或等于90°。例如，当夹角为90°时，当第三色光LR的光束以45°入射角射入其中一个反射透镜后被反射且形成的光路被弯折的角度为90°，被反射后的光束射向另一个反射透镜再次本反射且形成的光路被弯折的角度为90°。此外，反射透镜70也可以设置于其他色光所形成的光路上，例如，反射透镜70可以设置于第一色光LB光路，以对第一色光LB进行反射和引导。通过设置反射透镜70可以对色光所形成的光路进行弯折和形成预定的光路。其中，反射透镜的的反射面与色光的入射方向之间所形成的夹角可以根据实际需求调整，例如，两者所形成的夹角可以大于90度。In some embodiments, the projector 100 further includes a reflective lens 70, which can be arranged on the optical path formed by the colored light to bend the optical path. As an example, the reflective lens 70 may be arranged on the optical path of the third color light LR to bend the optical path of the third color light LR. For example, two reflective lenses 70 can be arranged on the optical path of the third color light LR at relatively intervals to reflect the optical path of the third color light LR twice to bend the light path twice, and the reflection surfaces of the two reflective lenses 70 form For a certain included angle, the included angle can be less than or equal to 90°. For example, when the included angle is 90°, when the beam of the third color light LR enters one of the reflective lenses at an incident angle of 45°, it is reflected and the formed light path is bent at an angle of 90°, and the reflected beam is shot The angle at which the optical path formed by the reflection to the other reflecting lens is bent is 90°. In addition, the reflective lens 70 may also be arranged on the optical path formed by other colored lights. For example, the reflective lens 70 may be arranged on the optical path of the first color light LB to reflect and guide the first color light LB. By setting the reflective lens 70, the light path formed by the colored light can be bent and a predetermined light path can be formed. The included angle formed between the reflective surface of the reflective lens and the incident direction of the colored light can be adjusted according to actual requirements. For example, the included angle formed by the two can be greater than 90 degrees.
本发明提供的投影仪100通过将第一色光LB的反射光谱落在无光波段W3，使得第一色光LB的反射光谱的漂移对实际分光结果不会产生影响，保证了分光后第一色光LB的单色场均匀性，使得投影仪100投射出的光束的颜色更加地均匀。In the projector 100 provided by the present invention, the reflection spectrum of the first color light LB falls in the non-light band W3, so that the drift of the reflection spectrum of the first color light LB does not affect the actual spectroscopy results, and ensures that the first color light LB after spectroscopy The uniformity of the monochromatic field of the color light LB makes the color of the light beam projected by the projector 100 more uniform.
以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其 依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围，均应包含在本发明的保护范围之内。The above embodiments are only used to illustrate the technical solutions of the present invention, not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, a person of ordinary skill in the art should understand that: The recorded technical solutions are modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the present invention Within the scope of protection.

Claims (16)

  1. 一种投影仪，其特征在于，包括：A projector, characterized in that it comprises:
    激光荧光光源，所述激光荧光光源所发出的光束形成不连续光谱，所述不连续光谱包括相互分离的第一波段和第二波段，所述第一波段和所述第二波段之间形成无光波段；以及A laser fluorescent light source, the light beam emitted by the laser fluorescent light source forms a discontinuous spectrum, and the discontinuous spectrum includes a first waveband and a second waveband that are separated from each other. Light band; and
    分色光学***，所述分色光学***包括第一分色镜，所述第一分色镜具有设定光谱特性，所述光谱特性中反射光谱段和透射光谱段之间的过渡光谱段与所述无光波段相对应，所述第一分色镜通过所述光谱特性将所述激光荧光光源所发出的光束分离为第一色光和第二色光，其中，所述第一色光与所述第一波段对应，所述第二色光与所述第二波段对应。A dichroic optical system, the dichroic optical system includes a first dichroic mirror, the first dichroic mirror has a set spectral characteristic, in the spectral characteristic, the transition spectral section between the reflection spectral section and the transmission spectral section is equal to Corresponding to the non-light band, the first dichroic mirror separates the light beam emitted by the laser fluorescent light source into a first color light and a second color light through the spectral characteristics, wherein the first color light and The first waveband corresponds, and the second color light corresponds to the second waveband.
  2. 根据权利要求1所述的投影仪，其特征在于，所述无光波段的波长范围在470nm～490nm之间。The projector according to claim 1, wherein the wavelength range of the non-light band is between 470nm and 490nm.
  3. 根据权利要求1所述的投影仪，其特征在于，所述第一色光为蓝光。The projector according to claim 1, wherein the first color light is blue light.
  4. 根据权利要求1所述的投影仪，其特征在于，所述投影仪还包括第二分色镜，所述第二分色镜位于所述第二色光所形成的光路，用于将所述第二色光分离为第三色光和第四色光。The projector according to claim 1, wherein the projector further comprises a second dichroic mirror, and the second dichroic mirror is located in the optical path formed by the second color light, and is used to transfer the second color light to the light path. The dichroic light is separated into the third color light and the fourth color light.
  5. 根据权利要求4所述的投影仪，其特征在于，第三色光为红光，所述第四色光为绿光，所述第三色光所形成的光路长度大于所述第四色光所形成的光路长度。The projector of claim 4, wherein the third color light is red light, the fourth color light is green light, and the length of the optical path formed by the third color light is greater than the optical path formed by the fourth color light length.
  6. 根据权利要求4或5所述的投影仪，其特征在于，所述投影仪还包括第一聚光透镜，所述第一聚光透镜设于所述第二色光所形成的光路，且位于所述第一分色镜和所述第二分色镜之间，以使所述第二色光在所述第二分色 镜处形成远心光路。The projector according to claim 4 or 5, wherein the projector further comprises a first condenser lens, and the first condenser lens is arranged on the optical path formed by the second color light and is located at the Between the first dichroic mirror and the second dichroic mirror, so that the second color light forms a telecentric optical path at the second dichroic mirror.
  7. 根据权利要求4所述的投影仪，其特征在于，所述投影仪还包括光调制***，所述光调制***包括第一调制部、第二调制部以及第三调制部，所述第一调制部设于所述第一色光所形成的光路，所述第二调制部设于所述第三色光所形成的光路，所述第三调制部设于所述第四色光所形成的光路。The projector according to claim 4, wherein the projector further comprises a light modulation system, the light modulation system comprising a first modulation section, a second modulation section, and a third modulation section, the first modulation system The part is provided in the optical path formed by the first color light, the second modulation part is provided in the optical path formed by the third color light, and the third modulation part is provided in the optical path formed by the fourth color light.
  8. 根据权利要求7所述的投影仪，其特征在于，所述投影仪还包括第二聚光透镜，所述第二聚光透镜设于所述第一色光所形成的光路，所述第二聚光透镜设于所述第一分色镜和所述第一调制部之间。The projector according to claim 7, wherein the projector further comprises a second condenser lens, the second condenser lens is arranged on the optical path formed by the first color light, and the second The condenser lens is arranged between the first dichroic mirror and the first modulation part.
  9. 根据权利要求7所述的投影仪，其特征在于，所述投影仪还包括第三聚光透镜，所述第三聚光透镜设于所述第三色光所形成的光路，所述第三聚光透镜设于所述第二分色透镜和所述第三调制部之间。The projector according to claim 7, wherein the projector further comprises a third condenser lens, the third condenser lens is arranged on the optical path formed by the third color light, and the third condenser lens The optical lens is arranged between the second dichroic lens and the third modulation part.
  10. 根据权利要求4所述的投影仪，其特征在于，所述投影仪还包括至少两个中继透镜，两个所述中继透镜设于所述第三色光所形成的光路。The projector according to claim 4, wherein the projector further comprises at least two relay lenses, and the two relay lenses are arranged on the optical path formed by the third color light.
  11. 根据权利要求4所述的投影仪，其特征在于，所述投影仪还包括第一透镜阵列、第二透镜阵列以及第四聚光透镜，所述第一透镜阵列、所述第二透镜阵列以及所述第四聚光透镜依次设于所述激光荧光光源与所述第一分色镜之间，所述第一透镜阵列用于将所述激光荧光光源所射出的光源光分隔为多个部分光束；所述第二透镜阵列用于将所述多个部分光束进行聚光。The projector of claim 4, wherein the projector further comprises a first lens array, a second lens array, and a fourth condenser lens, the first lens array, the second lens array, and The fourth condenser lens is sequentially arranged between the laser fluorescent light source and the first dichroic mirror, and the first lens array is used to divide the light source light emitted by the laser fluorescent light source into a plurality of parts Light beam; the second lens array is used to condense the multiple partial light beams.
  12. 根据权利要求7所述的投影仪，其特征在于，所述第一调制部、所述第二调制部以及第三调制部均为液晶显示器。7. The projector according to claim 7, wherein the first modulation section, the second modulation section, and the third modulation section are all liquid crystal displays.
  13. 根据权利要求12所述的投影仪，其特征在于，所述投影仪还包括偏 光转换***，所述偏光转换***设于所述激光荧光光源和所述第一分色镜之间，所述偏光转换***用于将所述激光荧光光源发出的光束转换为偏振光。The projector according to claim 12, wherein the projector further comprises a polarization conversion system, the polarization conversion system is provided between the laser fluorescent light source and the first dichroic mirror, and the polarized light The conversion system is used to convert the light beam emitted by the laser fluorescent light source into polarized light.
  14. 根据权利要求13所述的投影仪，其特征在于，所述第一调制部、所述第二调制部以及所述第三调制部中每个包括液晶面板和两个偏振滤光器，所述液晶面板位于两个所述偏振滤光器之间。The projector according to claim 13, wherein each of the first modulation section, the second modulation section, and the third modulation section includes a liquid crystal panel and two polarization filters, and the The liquid crystal panel is located between the two polarizing filters.
  15. 根据权利要求4所述的投影仪，其特征在于，所述投影仪还包括反射透镜，所述反射透镜设于所述第三色光所形成的光路以使所述第三色光所形成的光路弯折。The projector according to claim 4, wherein the projector further comprises a reflective lens, and the reflective lens is arranged on the optical path formed by the third color light so as to bend the optical path formed by the third color light. fold.
  16. 根据权利要求4所述的投影仪，其特征在于，所述投影仪包括至少两个中继透镜，至少两个所述中继透镜均设于所述第三色光所形成的光路。The projector according to claim 4, wherein the projector comprises at least two relay lenses, and at least two of the relay lenses are both arranged on the optical path formed by the third color light.
PCT/CN2020/142119 2020-02-25 2020-12-31 Projector WO2021169593A1 (en)

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CN104849952A (en) * 2010-06-18 2015-08-19 索尼公司 Illumination device and image display apparatus
CN108139658A (en) * 2015-10-16 2018-06-08 精工爱普生株式会社 Projecting apparatus
CN211352342U (en) * 2020-02-25 2020-08-25 深圳光峰科技股份有限公司 Projector with a light source

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08114779A (en) * 1994-10-13 1996-05-07 Mitsubishi Electric Corp Projection display device
CN101762960A (en) * 2008-12-25 2010-06-30 精工爱普生株式会社 Projector
CN104849952A (en) * 2010-06-18 2015-08-19 索尼公司 Illumination device and image display apparatus
CN108139658A (en) * 2015-10-16 2018-06-08 精工爱普生株式会社 Projecting apparatus
CN211352342U (en) * 2020-02-25 2020-08-25 深圳光峰科技股份有限公司 Projector with a light source

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