CN103186026B - Light source device, light source generation method and laser projector with light source device - Google Patents
Light source device, light source generation method and laser projector with light source device Download PDFInfo
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- CN103186026B CN103186026B CN201310089537.5A CN201310089537A CN103186026B CN 103186026 B CN103186026 B CN 103186026B CN 201310089537 A CN201310089537 A CN 201310089537A CN 103186026 B CN103186026 B CN 103186026B
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- 230000005494 condensation Effects 0.000 claims abstract description 17
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- 239000000463 material Substances 0.000 claims description 13
- 238000005286 illumination Methods 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 5
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- 230000003287 optical effect Effects 0.000 description 6
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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
- G03B21/2053—Intensity control of illuminating light
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
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- 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
- G02B27/10—Beam splitting or combining systems
- G02B27/106—Beam splitting or combining systems for splitting or combining a plurality of identical beams or images, e.g. image replication
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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
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Projection Apparatus (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention discloses a light source device, a light source generation method and a laser projector with the light source device. The light source device comprises first laser light sources, collimation parts, a reflection part, a first condensation part, a dichroic part, a drive part, a second condensation part, a wavelength conversion part, a fourth light source, a third condensation part and a light receiving part. According to the light source device, the light source generation method and the laser projector with the light source device, the problem of periodical brightness variation generated by a light source can be effectively solved, and the quality of a projected image can be greatly improved.
Description
Technical Field
The present invention relates to laser projection technology, and more particularly, to a light source device, a light source generating method, and a laser projector including the light source device.
Background
In recent years, laser projectors have been widely used in many applications, such as television projection, micro projection, and some commercial, educational, and home entertainment systems, because of their advantages, such as long life, high brightness of screen, and rich colors.
It is known that an optical picture needs to be composed of at least light waves of different dominant wavelengths, for example of blue, green and red light waves. In the prior art, a light source with one wavelength is usually used as an excitation light to generate a light source with another wavelength, and then the light source is emitted in a time-sharing manner with the light sources with other wavelengths, so that various pictures are displayed on a projection screen. For example, green phosphor may be excited to generate green light with blue laser light emitted from a blue semiconductor laser as excitation light.
Fig. 1 is a schematic diagram of a structure and a principle of a light source device in the prior art. Referring to fig. 1, the light source herein includes: a first light source 101, a second light source (not shown in fig. 1), and a third light source 116, each having a different wavelength. The light source device includes: the light source device comprises a collimating mirror 102, a reflector group 103, a first condenser lens 104, a first dichroic sheet 105, a second condenser lens 106, a fluorescent wheel 107, a first steering mirror 109a, a second steering mirror 109b, a first reflector 110a, a second reflector 110b, a second dichroic sheet 111, a third condenser lens 112, a light bar 113, a fourth condenser lens 114 and a third steering mirror 115.
Wherein the first dichroic filter 105 allows the first and third light sources to transmit therethrough and reflects the second light source, and the second dichroic filter 111 allows the first light source to transmit therethrough and reflects the second and third light sources.
In addition, a phosphor is applied to a partial region of the fluorescent wheel 107, and in the case where the first light source 101 is used as excitation light, a second light source is generated in the region where the phosphor is applied. Since the fluorescent wheel is rotatable, the first light source illuminates different areas of the fluorescent wheel 107, which generates light of different wavelengths.
In fig. 1, a light beam having a first wavelength emitted from a first light source 101 is divergently incident on a collimator 102, and the collimator 102 collimates the light beam into a parallel light beam; the optical axis of the parallel light beam is rotated by 90 degrees due to the reflection action of the reflector group 103, and the parallel light beam after the rotating optical axis is converged by the first condenser lens 104 and emitted to the first dichroic filter 105; the light beam of the first light source passes through the first dichroic plate 105, is condensed by the second condenser lens 106, and reaches the fluorescent wheel 107.
The fluorescent wheel 107 is rotated by the driving motor 117. For the rotating fluorescent wheel 107, if the first light source 101 is incident on the fluorescent area, the fluorescent powder is excited to emit a second light source with a second wavelength, the second light source is emitted in a direction opposite to the incident direction of the first light source, and after reaching the first dichroic plate 105, the optical axis thereof is rotated by 90 degrees under the reflection action, and after passing through the first turning mirror 109a, the first reflecting mirror 110a, and the second turning mirror 109b, the light is incident on the second dichroic plate 111; since the second dichroic plate 111 reflects the second light source, the light beam of the second light source is directed to the third condenser lens 112 and finally focused into the light rod 113. In short, when the first light source 101 is incident on the phosphor region of the phosphor wheel 107, the light bar 113 collects the second light source having the second wavelength.
When the first light source 101 is incident on the transmission region of the fluorescent wheel 107 without being coated with the phosphor, the first light source 101 transmits through the fluorescent wheel 107, is converged, reflected and steered by the fourth condenser lens 114, the second reflector 110b and the third steering mirror 115, is transmitted to the third condenser lens 112 through the second dichroic filter 111, and is finally focused into the light bar 113. That is, when the first light source 101 is incident on the transmission region of the fluorescent wheel 107, the light rod 113 collects the first light source having the first wavelength.
A third light source 116 with a third wavelength is emitted in a direction parallel to the optical axis of the first light source, and reaches the first dichroic filter 105 after being converged by the second condenser lens 106, and because the third light source is allowed to transmit by the first dichroic filter 105, the third light source reaches the second dichroic filter 111 after being turned, reflected, and re-turned by the first turning mirror 109a, the first reflector 110a, and the second turning mirror 109 b; the second dichroic plate 111 rotates the optical axis of the third light source 116 by 90 degrees, passes through the third condenser lens 112, and is finally focused into the light rod 113.
Based on the structure and the principle, the first light source, the second light source and the third light source can enter the light bar 113 in a time-sharing manner by controlling the lighting time of the first light source and the third light source and controlling the rotation speed of the fluorescent wheel, so that light spots with different colors can be obtained, and a display picture can be formed.
Although the above-described conventional light source device enables laser projection, it can be seen from fig. 1 that the drive motor 117 of the luminescent wheel 107 in the light source device is a rotating electric machine. The rotating motor can cause a motor shaft of the rotating motor to periodically swing around a shaft due to the influence of the rotational inertia. Therefore, when the rotating motor starts to rotate and the motor shaft of the rotating motor swings, the fluorescent wheel 107 moves back and forth relative to the predetermined design position, so that the light source generated by the light source device generates periodic brightness change due to the back and forth movement of the fluorescent wheel 107, thereby causing periodic brightness change and non-uniformity of the image brightness of the same projection image and reducing the quality of the projection image. Meanwhile, the system of the existing light source device is relatively complex and difficult to install and adjust. In addition, in the light source device in the prior art, the motor rotating at high speed is a safety hazard.
As can be seen from the above, the light source device in the prior art still has some of the above problems, and therefore, there is a need to provide a better light source device, so as to avoid the problem of periodic brightness variation of the light source and improve the quality of the projected picture.
Disclosure of Invention
According to the invention, the light source device, the light source generating method and the laser projector comprising the light source device are provided, so that the problem that the light source generates periodic brightness change can be effectively avoided, and the quality of a projection picture is greatly improved.
A light source device according to the present invention includes: a first laser light source, a collimating component, a reflecting component, a first condensing component, a dichroic component, a driving component, a second condensing component, a wavelength converting component, a fourth light source, a third condensing component and a light receiving component;
wherein the first laser light source is configured to output a first light beam to the collimating component;
the collimation component is used for collimating the received first light beam to obtain a parallel light beam and outputting the parallel light beam to the reflection component;
the reflecting component is used for reflecting the parallel light beams to the first light focusing component;
the first light focusing component is used for focusing the received parallel light beams and outputting the light beams to the dichroic component;
the driving component is used for moving the dichroic component to a plurality of specified positions according to a control instruction; wherein the plurality of designated locations includes at least: a first position and a second position;
the dichroic component is used for reflecting the light beam output by the first light-gathering component to the second light-gathering component when the dichroic component is positioned at the first position; transmitting the light beam output from the second light condensing part to the light receiving part; reflecting the light beam output by the third light-focusing part to the light-receiving part; the first light-gathering component is used for gathering light beams output by the first light-gathering component; transmitting the light beam output from the second light condensing part to the light receiving part;
the second light condensing component condenses the received light beam reflected by the dichroic component and outputs the light beam to the wavelength conversion component, and outputs the light beam output by the wavelength conversion component to the dichroic component;
the wavelength conversion component is used for outputting a second light beam according to the received light beam in a stimulated mode when the dichroic component is located at the first position, and outputting the second light beam to the second light condensation component; the dichroic component is used for receiving the light beam from the first light-focusing component and outputting the light beam to the second light-focusing component;
the fourth light source is used for outputting a fourth light beam to the third light-condensing part;
and the third light condensing component is used for condensing the fourth light beam and outputting the condensed fourth light beam to the dichroic component.
Wherein the driving member is connected to the dichroic member through a driving shaft.
Wherein the driving part is a driving motor.
Wherein the wavelength conversion member includes at least: the plurality of cavities correspond to the plurality of designated positions reachable by the dichroic component one by one and are independent from each other, and the fluorescent powder reflecting plates are wrapped around the plurality of cavities; wherein,
the inner wall of each cavity is provided with a high-reflection film, the high-reflection film at the bottom of each cavity is coated with fluorescent powder for stimulated output of light beams with corresponding wavelengths, and the high-reflection film at the top of each cavity is provided with a light-transmitting material with a preset area.
Wherein the plurality of cavities comprises at least: a first cavity and a second cavity.
Wherein a heat sink is disposed under the plurality of cavities of the wavelength converting member.
Wherein when the plurality of designated locations includes only the first location and the second location and the plurality of cavities includes only the first cavity and the second cavity:
the driving part is an electromagnet connected with a power supply;
a magnet is disposed on the dichroic member.
Wherein the light receiving part includes: a fifth condenser lens and a light rod; wherein,
the fifth condenser lens is used for carrying out convergence processing on the light beam to enter the light receiving part;
and the light bar is used for collecting the light beams subjected to the convergence processing by the fifth condenser lens.
The present invention also provides a light source generating method for use in a light source device including a first laser light source, a collimating component, a reflecting component, a first light focusing component, a dichroic component, a driving component, a second light focusing component, a wavelength converting component, a fourth light source, a third light focusing component, and a light receiving component, the method including:
the collimation component is used for collimating the first light beam output by the first laser light source to obtain a parallel light beam;
reflecting, by the reflecting means, the parallel light beams to the first light condensing means;
the first light-gathering component gathers the received parallel light beams and outputs the light beams to the dichroic component;
moving, by the drive component, the dichroic component to a plurality of specified positions according to a control instruction; wherein the plurality of designated locations includes at least: a first position and a second position;
when the dichroic component is located at the first position, the dichroic component reflects the light beam output by the first light-condensing component to the second light-condensing component; the second light condensation component converges the light beam reflected by the dichroic component and outputs the converged light beam to the wavelength conversion component; the wavelength conversion component is excited to output a second light beam according to the received light beam and outputs the second light beam to the second light condensation component; the second condensing part outputs the second light beam to the dichroic part; the dichroic component transmits the second light beam to the light receiving component;
simultaneously, the fourth light source outputs a fourth light beam to the third light condensing part; the third light condensing component converges the fourth light beam and outputs the converged fourth light beam to the dichroic component; the dichroic component reflects the fourth light beam to the light receiving component;
when the dichroic member is located at the second position, the dichroic member reflects the light beam output from the first light condensing member to the second light condensing member; the second light condensation component converges the light beam reflected by the dichroic component and outputs the converged light beam to the wavelength conversion component; the wavelength conversion component is used for outputting a third light beam according to the received light beam in a stimulated mode and outputting the third light beam to the second light condensation component; the second condensing part outputs the third light beam to the dichroic part; the dichroic component transmits the third light beam to the light receiving component.
The invention also provides a laser projector, comprising: an optical-mechanical module, a control module, a power driving module and the light source device, wherein,
the optical-mechanical module consists of a uniform illumination component, a display chip and a projection lens;
the light source device provides a usable light source for the laser projector;
the optical-mechanical module receives a light source provided by the light source device, the dodging illumination component further dodges the light source, the display chip generates a picture under the real-time control of the control module, and the generated picture is projected to form a picture to be displayed through the projection lens.
In the light source device, the light source generating method and the laser projector including the light source device, the dichroic component which can rotate to different specified positions is used in the light source device, so that light beams output by the first laser light source can be reflected to the light-transmitting materials of different cavities of the wavelength conversion component, different cavities of the wavelength conversion component are stimulated to output light beams with different wavelengths, and different available light sources are formed. Because the light source device does not use the fluorescent wheel and the rotating motor, but uses the dichroic component which can move to a plurality of specified positions, the problem that the position of the fluorescent wheel moves when the rotating motor is used, and further the light source generates periodic brightness change can be effectively avoided, thereby greatly improving the quality of a projection picture. Moreover, the structure of the light source device is simple, so that the light source system is effectively simplified, the assembly and adjustment efficiency is improved, and the potential safety hazard of using a high-speed rotating motor is also solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is to be understood that the drawings in the following description are merely exemplary of the invention and that other embodiments and drawings may be devised by those skilled in the art based on the exemplary embodiments shown in the drawings.
FIG. 1 is a schematic diagram of a light source device according to the prior art;
FIG. 2 is a schematic diagram illustrating a structure and a principle of a light source device according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a driving component and a dichroic component in an embodiment of the present invention;
FIG. 4 is a schematic diagram of a dichroic element in a first position in an embodiment of the present invention;
FIG. 5 is a schematic diagram of a dichroic element in a second position in an embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of a wavelength conversion member in an embodiment of the invention;
FIG. 7 is a top schematic view of a wavelength converting member in an embodiment of the present invention;
FIG. 8a is a first schematic structural diagram of a driving component and a dichroic component in another embodiment of the present invention;
FIG. 8b is a second schematic structural diagram of a driving component and a dichroic component in another embodiment of the present invention;
fig. 9 is a schematic diagram of a laser projector in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples.
Fig. 2 is a schematic structural and schematic diagram of a light source device according to an embodiment of the present invention. As shown in fig. 2, in an embodiment of the present invention, the light source device at least includes: a first laser light source 201, a collimating component 202, a reflecting component 203, a first light focusing component 204, a dichroic component 205, a driving component 205a (not shown in fig. 2), a second light focusing component 206, a wavelength converting component 207, a fourth light source 209, a third light focusing component 208, and a light receiving component 210. The fourth light source 209 may be an LED light source or a semiconductor laser light source.
Wherein, the first laser source 201 is configured to output a first light beam to the collimating component 202. The collimating component 202 is configured to perform collimation on the received first light beam to obtain a parallel light beam, and output the parallel light beam to the reflecting component 203.
A reflecting part 203 for reflecting the parallel light beams to the first light focusing part 204; and a first light focusing element 204 for focusing the received parallel light beams and outputting the focused light beams to the dichroic element 205.
A driving unit 205a configured to move the dichroic unit 205 to a plurality of specified positions according to a control instruction; wherein the plurality of designated locations includes at least: a first position and a second position.
The dichroic component 205 is configured to reflect the light beam output by the first light focusing component 204 to the second light focusing component 206 when located at the first position; transmitting the light beam output from the second condensing part 206 to the light receiving part 210; reflecting the light beam output by the third light focusing part 208 to the light receiving part 210; when the first focusing element 204 is located at the first position, the first focusing element is used for focusing the light beam output by the first focusing element 206; the light beam output from the second condensing part 206 is transmitted to the light receiving part 210.
The second condensing unit 206 condenses the received light beam reflected by the dichroic unit 205 and outputs the condensed light beam to the wavelength conversion unit 207, and outputs the light beam output by the wavelength conversion unit 207 to the dichroic unit 205; a wavelength conversion member 207 for outputting a second light beam according to the received light beam when the dichroic member 205 is located at the first position, and outputting the second light beam to the second condensing member 206; and is further configured to output a third light beam according to the received light beam when the dichroic component 205 is located at the second position, and output the third light beam to the second light-focusing component 206.
The fourth light source 209 is configured to output a fourth light beam to the third condensing unit 208; and a third condensing element 208 for condensing the fourth light beam and outputting the condensed fourth light beam to the dichroic element 205.
Fig. 3 is a schematic structural diagram of a driving component and a dichroic component in an embodiment of the present invention. As shown in fig. 3, in the preferred embodiment of the present invention, the driving member 205a is connected to the dichroic member 205 through the driving shaft 205b, so that the dichroic member 205 can be driven by the driving member 205a to swing to a plurality of designated positions.
Preferably, in the embodiment of the present invention, the driving member 205a is a driving motor.
Fig. 4 is a schematic diagram of the dichroic member in a first position in an embodiment of the present invention. Fig. 5 is a schematic diagram of the dichroic member in a second position in an embodiment of the present invention.
As shown in fig. 4, in the preferred embodiment of the present invention, when the dichroic component 205 is located at the first position, the light beam output by the first light focusing component 204 will be reflected by the dichroic component 205 to the second light focusing component 206, and then be focused by the second light focusing component 206 and output to the wavelength conversion component 207; the wavelength conversion component 207 is excited to output a second light beam according to the received light beam, and outputs the second light beam to the second light focusing component 206; the second condensing part 206 outputs the second light beam output from the wavelength conversion part 207 to the dichroic part 205; the dichroic component 205 transmits the second light beam output from the second light-focusing component 206 to the light-receiving component 210. In short, when the dichroic component 205 is located at the first position, the light receiving component 210 collects a second available light source having a second wavelength.
As shown in fig. 5, in the preferred embodiment of the present invention, when the dichroic component 205 is located at the second position, the light beam output by the first light focusing component 204 will be reflected by the dichroic component 205 to the second light focusing component 206, and then be focused by the second light focusing component 206 and output to the wavelength conversion component 207; the wavelength conversion component 207 is excited to output a third light beam according to the received light beam, and outputs the third light beam to the second light focusing component 206; the second condensing part 206 outputs the third light beam output from the wavelength conversion part 207 to the dichroic part 205; the dichroic component 205 transmits the third light beam output from the second light-focusing component 206 to the light-receiving component 210. In short, when the dichroic component 205 is located at the second position, the light receiving component 210 collects a third available light source with a third wavelength.
Further, when the dichroic component 205 is located at the first position, the fourth light source 209 may output a fourth light beam to the third condensing component 208, the third condensing component 208 may condense the fourth light beam and output the condensed fourth light beam to the dichroic component 205, and the dichroic component 205 may further reflect the fourth light beam output by the third condensing component 208 to the light receiving component 210. Thus, when the dichroic component 205 is in the first position, the light receiving component 210 may also collect a fourth available light source having a fourth wavelength.
Preferably, when the dichroic member 205 is located at the second position, the fourth light source 209 will not output the fourth light beam at this time because the second position where the dichroic member 205 is currently located has changed in angle with respect to the first position.
Based on the above structure and principle, it can be known that by controlling the lighting time of the first light source and the fourth light source and controlling the position of the dichroic component 205, the second available light source, the third available light source and the fourth available light source can enter the light receiving component 210 in a time-sharing manner, so as to obtain light spots of different colors, thereby forming a required display picture.
Fig. 6 is a schematic cross-sectional view of a wavelength conversion member in an embodiment of the present invention. Fig. 7 is a top schematic view of a wavelength converting member in an embodiment of the present invention. As shown in fig. 6 and 7, in the preferred embodiment of the present invention, the wavelength conversion member 207 at least includes: a plurality of cavities which are one-to-one corresponding to a plurality of designated positions reachable by the dichroic member 205 and are independent from each other, and phosphor reflectors 64 which are wrapped around the plurality of cavities;
a highly reflective film 63 is disposed on the inner wall of each cavity, and the highly reflective film at the bottom of each cavity is coated with a phosphor for stimulated output of a light beam with a corresponding wavelength (for example, as shown in fig. 6, the highly reflective film at the bottom of the first cavity 61 is coated with a second wavelength phosphor 611 for stimulated output of a second light beam with a second wavelength, and the highly reflective film at the bottom of the second cavity 62 is coated with a third wavelength phosphor 621 for stimulated output of a third light beam with a third wavelength, and so on), and the highly reflective film at the top of each cavity is provided with a light transmissive material with a predetermined area.
Preferably, as shown in fig. 6, in an embodiment of the present invention, the plurality of cavities at least include: a first cavity 61 and a second cavity 62.
Therefore, when the dichroic component 205 is driven by the driving component 205a to move to different positions, the dichroic component 205 can reflect the light beam output by the first light focusing component 204 to the second light focusing component 206, and make the reflected light beam pass through the second light focusing component 206 and then project onto the light-transmitting material on the top of the corresponding cavity on the wavelength conversion component 207, so as to transmit into the corresponding cavity and irradiate onto the phosphor on the bottom of the corresponding cavity, so that the phosphor is excited to output a laser beam with a corresponding wavelength; after the laser beam is reflected by the highly reflective film on the inner wall of the corresponding cavity, the laser beam is transmitted out of the corresponding cavity from the light-transmitting material on the top of the corresponding cavity, and then is output to the dichroic component 205 through the second condensing component 206; and the dichroic part 205 may transmit the output light beam to the light receiving part 210.
For example, taking the example that the plurality of designated locations only include the first location and the second location, and the plurality of cavities only include the first cavity 61 and the second cavity 62, and the first location corresponds to the first cavity 61 and the second location corresponds to the second cavity 62:
when the dichroic component 205 is driven by the driving component 205a to move to the first position, the dichroic component 205 may reflect the light beam output by the first light focusing component 204, and make the reflected light beam project onto the light-transmitting material 610 on the top of the first cavity 61 on the wavelength conversion component 207 after being focused by the second light focusing component 206, so as to be transmitted into the first cavity 61 and irradiate onto the second wavelength phosphor 611 at the bottom of the first cavity 61, so that the second wavelength phosphor 611 is excited to output a second light beam with the second wavelength; the second light beam is reflected by the highly reflective film 63 on the inner wall of the first cavity 61, transmitted out of the first cavity 61 from the light-transmitting material 610 on the top of the first cavity 61, and then output to the dichroic component 205 through the second light-focusing component 206; and the dichroic part 205 may transmit the output second light beam to the light receiving part 210.
Similarly, when the dichroic member 205 is moved to the second position by the driving member 205a, the second position where the dichroic member 205 is currently located has changed in angle with respect to the first position, and thus the position of the light spot formed by the light beam reflected by the dichroic member 205 will also be changed accordingly. At this time, the dichroic component 205 may reflect the light beam output by the first light focusing component 204, and make the reflected light beam, after being focused by the second light focusing component 206, project onto the light-transmitting material 620 on the top of the second cavity 62 on the wavelength conversion component 207 (instead of the light-transmitting material 610 on the top of the first cavity 61), so as to transmit into the second cavity 62 and irradiate onto the third wavelength phosphor 621 at the bottom of the second cavity 62, so that the third wavelength phosphor 621 is excited to output a third light beam with a third wavelength; the third light beam is reflected by the highly reflective film 63 on the inner wall of the second cavity 62, transmitted out of the second cavity 62 from the light-transmitting material 620 on the top of the second cavity 62, and then output to the dichroic component 205 through the second light-focusing component 206; and the dichroic part 205 may transmit the output third light beam to the light receiving part 210.
By analogy, when the plurality of designated locations includes N locations and the plurality of cavities includes only N cavities corresponding to the N locations, the light receiving part 210 may receive light beams of N different wavelengths when the dichroic part 205 moves to N different locations under the driving of the driving part 205 a. The detailed process is not described herein. Preferably, in a specific embodiment of the present invention, N is a natural number greater than or equal to 2, and a specific value of N may also be predetermined according to an actual application situation, which is not described herein again.
Preferably, in an embodiment of the present invention, a heat sink 65 is further disposed under the plurality of cavities of the wavelength conversion member 207 for dissipating heat of the entire wavelength conversion member 207.
In addition, in the preferred embodiment of the present invention, when the plurality of designated positions include only the first position and the second position and the plurality of cavities include only the first cavity 61 and the second cavity 62, the driving part 205a may be an electromagnet (e.g., a solenoid) connected to a power source instead of a driving motor, and a magnet may be provided on the dichroic part 205.
Preferably, in an embodiment of the present invention, the magnet may be disposed at any end of the dichroic element 205; alternatively, the magnet may be provided in the middle of the dichroic member 205 near the drive shaft 205 b.
For example, fig. 8a is a first schematic structural diagram of a driving component and a dichroic component in another embodiment of the present invention. As shown in fig. 8a, in the preferred embodiment of the present invention, the driving member 205a is an electromagnet (e.g., a solenoid) connected to a power source; one end of the dichroic element 205 close to the driving element 205a is provided with a magnet 205 c.
Fig. 8b is a schematic structural diagram of a driving component and a dichroic component in another embodiment of the present invention. In the preferred embodiment of the present invention, as shown in fig. 8b, the driving component 205a is an electromagnet (e.g., a solenoid) connected to a power source, and the magnet on the dichroic component 205 is disposed near the driving shaft 205b in the middle of the dichroic component 205. At this time, the magnet only needs to move a small distance under the force of the electromagnet to drive the dichroic member 205 to move to the first position and the second position.
Since the two ends of the magnet 205c disposed on the dichroic element 205 have different poles, and when the solenoid 205a is energized, the two ends of the solenoid 205a will also generate corresponding poles, and the polarity of the energized solenoid 205a corresponds to the direction of the current, only the direction of the current in the solenoid 205a needs to be changed to change the polarity of the solenoid 205a, so that when the magnetic property of one end of the solenoid 205a near the dichroic element 205 is the same as the magnetic pole of one end of the magnet 205c near the driving element 205a, the solenoid 205a will generate a pushing force to the end of the dichroic element 205 where the magnet 205c is disposed, thereby changing the position of the dichroic element 205; similarly, when the magnetic polarity of the end of the solenoid 205a near the dichroic member 205 is different from the magnetic polarity of the end of the magnet 205c near the driving member 205a, the solenoid 205a will generate an attractive force to the end of the dichroic member 205 where the magnet 205c is disposed, and the position of the dichroic member 205 can also be changed. Therefore, the dichroic member 205 can be moved to the first position or the second position by simply changing the direction of the current in the solenoid 205a according to the control command, thereby driving the dichroic member 205.
In addition, as shown in fig. 2, 4 and 5, in a preferred embodiment of the present invention, the light receiving part 210 may include: a fifth condenser lens 210a and a light rod 201 b;
the fifth condenser lens 210a is configured to perform a condensing process on the light beam entering the fifth condenser lens 201 a;
the light rod 201b is configured to collect the light beam converged by the fifth condenser lens 201 a.
Preferably, in an embodiment of the present invention, the light receiving part 210 may be: a fly-eye lens; the fly-eye lens is used for receiving and collecting the light beam entering the fly-eye lens.
According to the structure of the light source device, in the technical scheme of the invention, as the dichroic component which can rotate to different specified positions is used in the light source device, the light beams output by the first laser light source can be reflected to the light-transmitting materials of different cavities of the wavelength conversion component, so that different cavities of the wavelength conversion component are stimulated to output light beams with different wavelengths, and different available light sources are formed. For example, when the designated positions of the dichroic members are the first position and the second position, the corresponding 3 available light sources are obtained: a second available light source, a third available light source, and a fourth available light source. When the plurality of designated positions of the dichroic member are N positions, a corresponding (N + 1) available light sources are obtained. Since the fluorescent wheel and the rotary motor are not required to be used in the above light source device, a dichroic member that can be moved to a plurality of designated positions is used. Therefore, the problem that the position of the fluorescent wheel is moved when a rotating motor is used, and further the light source generates periodic brightness change is effectively avoided, and the projection quality can be greatly improved. Moreover, the structure of the light source device is simple, so that the light source system is effectively simplified, the assembly and adjustment efficiency is improved, and the potential safety hazard of using a high-speed rotating motor is also solved.
In addition, in an aspect of the present invention, there is provided a light source generating method for a light source device including a first laser light source, a collimating component, a reflecting component, a first light focusing component, a dichroic component, a driving component, a second light focusing component, a wavelength converting component, a fourth light source, a third light focusing component, and a light receiving component, the method including:
the collimation component is used for collimating the first light beam output by the first laser light source to obtain a parallel light beam;
reflecting, by the reflecting means, the parallel light beams to the first light condensing means;
the first light-gathering component gathers the received parallel light beams and outputs the light beams to the dichroic component;
moving, by the drive component, the dichroic component to a plurality of specified positions according to a control instruction; wherein the plurality of designated locations includes at least: a first position and a second position;
when the dichroic component is located at the first position, the dichroic component reflects the light beam output by the first light-condensing component to the second light-condensing component; the second light condensation component converges the light beam reflected by the dichroic component and outputs the converged light beam to the wavelength conversion component; the wavelength conversion component is excited to output a second light beam according to the received light beam and outputs the second light beam to the second light condensation component; the second condensing part outputs the second light beam to the dichroic part; the dichroic component transmits the second light beam to the light receiving component;
simultaneously, the fourth light source outputs a fourth light beam to the third light condensing part; the third light condensing component converges the fourth light beam and outputs the converged fourth light beam to the dichroic component; the dichroic component reflects the fourth light beam to the light receiving component;
when the dichroic member is located at the second position, the dichroic member reflects the light beam output from the first light condensing member to the second light condensing member; the second light condensation component converges the light beam reflected by the dichroic component and outputs the converged light beam to the wavelength conversion component; the wavelength conversion component is used for outputting a third light beam according to the received light beam in a stimulated mode and outputting the third light beam to the second light condensation component; the second condensing part outputs the third light beam to the dichroic part; the dichroic component transmits the third light beam to the light receiving component.
In addition, the invention further provides a laser projector.
Fig. 9 is a schematic diagram of a laser projector in an embodiment of the present invention. As shown in fig. 9, the laser projector in the embodiment of the present invention includes: an optical-mechanical module 901, a control module 903, a power driving module 902 and the light source device 900 as described above;
the optical-mechanical module 901 is composed of a uniform-light illumination component, a display chip and a projection lens;
the light source device 900 provides a usable light source for the laser projector;
the optical-mechanical module 901 receives the light source provided by the light source device 900, wherein the light-homogenizing illumination component homogenizes the light source further, the display chip generates a picture under the real-time control of the control module 903, and the generated picture is projected out of the picture to be displayed through the projection lens;
the power driving module 902 provides driving power for the light source device 900 and the display chip.
In summary, in the light source device, the light source generating method and the laser projector including the light source device provided in the present invention, since one dichroic member capable of rotating to different designated positions is used in the light source device, the light beam output by the first laser light source can be reflected onto the light-transmitting material of different cavities of the wavelength conversion member, so that different cavities of the wavelength conversion member are stimulated to output light beams with different wavelengths, thereby forming different multiple usable light sources. Because the light source device does not use the fluorescent wheel and the rotating motor, but uses the dichroic component which can move to a plurality of specified positions, the problem that the position of the fluorescent wheel moves when the rotating motor is used, and further the light source generates periodic brightness change can be effectively avoided, thereby greatly improving the quality of a projection picture. Moreover, the structure of the light source device is simple, so that the light source system is effectively simplified, the assembly and adjustment efficiency is improved, and the potential safety hazard of using a high-speed rotating motor is also solved.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A light source device, comprising: a first laser light source, a collimating component, a reflecting component, a first condensing component, a dichroic component, a driving component, a second condensing component, a wavelength converting component, a fourth light source, a third condensing component and a light receiving component;
wherein the first laser light source is configured to output a first light beam to the collimating component;
the collimation component is used for collimating the received first light beam to obtain a parallel light beam and outputting the parallel light beam to the reflection component;
the reflecting component is used for reflecting the parallel light beams to the first light focusing component;
the first light focusing component is used for focusing the received parallel light beams and outputting the light beams to the dichroic component;
the driving component is used for moving the dichroic component to a plurality of specified positions according to a control instruction; wherein the plurality of designated locations includes at least: a first position and a second position;
the dichroic component is used for reflecting the light beam output by the first light-gathering component to the second light-gathering component when the dichroic component is positioned at the first position; transmitting the light beam output from the second light condensing part to the light receiving part; reflecting the light beam output by the third light-focusing part to the light-receiving part; the first light-gathering component is used for gathering light beams output by the first light-gathering component; transmitting the light beam output from the second light condensing part to the light receiving part;
the second light condensing component condenses the received light beam reflected by the dichroic component and outputs the light beam to the wavelength conversion component, and outputs the light beam output by the wavelength conversion component to the dichroic component;
the wavelength conversion component is used for outputting a second light beam according to the received light beam in a stimulated mode when the dichroic component is located at the first position, and outputting the second light beam to the second light condensation component; the dichroic component is used for receiving the light beam from the first light-focusing component and outputting the light beam to the second light-focusing component;
the fourth light source is used for outputting a fourth light beam to the third light-condensing part;
and the third light condensing component is used for condensing the fourth light beam and outputting the condensed fourth light beam to the dichroic component.
2. The light source device according to claim 1, wherein:
the driving member is connected to the dichroic member through a driving shaft.
3. The light source device according to claim 1 or 2, wherein:
the driving part is a driving motor.
4. The light source device according to claim 1, wherein the wavelength conversion member includes at least: the plurality of cavities correspond to the plurality of designated positions reachable by the dichroic component one by one and are independent from each other, and the fluorescent powder reflecting plates are wrapped around the plurality of cavities; wherein,
the inner wall of each cavity is provided with a high-reflection film, the high-reflection film at the bottom of each cavity is coated with fluorescent powder for stimulated output of light beams with corresponding wavelengths, and the high-reflection film at the top of each cavity is provided with a light-transmitting material with a preset area.
5. The light source device of claim 4, wherein the plurality of cavities comprises at least: a first cavity and a second cavity.
6. The light source device according to claim 4 or 5, wherein:
a heat sink is disposed beneath the plurality of cavities of the wavelength converting member.
7. The light source device of claim 5, wherein when the plurality of designated locations include only the first location and the second location and the plurality of cavities include only the first cavity and the second cavity:
the driving part is an electromagnet connected with a power supply;
a magnet is disposed on the dichroic member.
8. The light source device according to claim 1, wherein the light receiving part comprises: a fifth condenser lens and a light rod; wherein,
the fifth condenser lens is used for converging the light beam entering the fifth condenser lens;
and the light bar is used for collecting the light beams subjected to the convergence processing by the fifth condenser lens.
9. A light source generation method for use in a light source device including a first laser light source, a collimating member, a reflecting member, a first light condensing member, a dichroic member, a driving member, a second light condensing member, a wavelength converting member, a fourth light source, a third light condensing member, and a light receiving member, the method comprising:
the collimation component is used for collimating the first light beam output by the first laser light source to obtain a parallel light beam;
reflecting, by the reflecting means, the parallel light beams to the first light condensing means;
the first light-gathering component gathers the received parallel light beams and outputs the light beams to the dichroic component;
moving, by the drive component, the dichroic component to a plurality of specified positions according to a control instruction; wherein the plurality of designated locations includes at least: a first position and a second position;
when the dichroic component is located at the first position, the dichroic component reflects the light beam output by the first light-condensing component to the second light-condensing component; the second light condensation component converges the light beam reflected by the dichroic component and outputs the converged light beam to the wavelength conversion component; the wavelength conversion component is excited to output a second light beam according to the received light beam and outputs the second light beam to the second light condensation component; the second condensing part outputs the second light beam to the dichroic part; the dichroic component transmits the second light beam to the light receiving component;
simultaneously, the fourth light source outputs a fourth light beam to the third light condensing part; the third light condensing component converges the fourth light beam and outputs the converged fourth light beam to the dichroic component; the dichroic component reflects the fourth light beam to the light receiving component;
when the dichroic member is located at the second position, the dichroic member reflects the light beam output from the first light condensing member to the second light condensing member; the second light condensation component converges the light beam reflected by the dichroic component and outputs the converged light beam to the wavelength conversion component; the wavelength conversion component is used for outputting a third light beam according to the received light beam in a stimulated mode and outputting the third light beam to the second light condensation component; the second condensing part outputs the third light beam to the dichroic part; the dichroic component transmits the third light beam to the light receiving component.
10. A laser projector, comprising: opto-mechanical module, control module, power driving module and light source device according to one of claims 1 to 8, wherein,
the optical-mechanical module consists of a uniform illumination component, a display chip and a projection lens;
the light source device provides a usable light source for the laser projector;
the optical-mechanical module receives a light source provided by the light source device, the dodging illumination component further dodges the light source, the display chip generates a picture under the real-time control of the control module, and the generated picture is projected to form a picture to be displayed through the projection lens.
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| CN201310089537.5A CN103186026B (en) | 2013-03-19 | 2013-03-19 | Light source device, light source generation method and laser projector with light source device |
| CN201510133407.6A CN104749867A (en) | 2013-03-19 | 2013-03-19 | Light source device, light source generating method and laser projector including light source device |
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| CN201310089537.5A CN103186026B (en) | 2013-03-19 | 2013-03-19 | Light source device, light source generation method and laser projector with light source device |
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| CN109416166B (en) * | 2016-07-29 | 2020-07-31 | 松下知识产权经营株式会社 | Light emitting device and lighting device |
| CN106324964A (en) * | 2016-11-16 | 2017-01-11 | 四川长虹电器股份有限公司 | Efficient laser projection system |
| CN110007550B (en) | 2018-01-04 | 2021-11-05 | 深圳光峰科技股份有限公司 | Light source system and projection equipment |
| CN108761770B (en) * | 2018-02-10 | 2022-08-02 | 洪贵顺 | Rotary pixel unit, display, electronic equipment and color development control method |
| CN110471245B (en) * | 2018-05-10 | 2021-10-22 | 深圳光峰科技股份有限公司 | Light source system, projection apparatus, and illumination apparatus |
| CN111142324A (en) * | 2018-11-05 | 2020-05-12 | 扬明光学股份有限公司 | Fixed wavelength conversion device and projector using same |
| CN112628621A (en) * | 2021-01-14 | 2021-04-09 | 苏州视奥光电科技有限公司 | Laser light source device |
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| JP2000347287A (en) * | 1999-06-04 | 2000-12-15 | Sanyo Electric Co Ltd | Projection type video display device |
| US20110134317A1 (en) * | 2006-04-28 | 2011-06-09 | Yong-Jing Wang | Image generation system producing compound images |
| CN101713908B (en) * | 2008-10-06 | 2011-08-24 | 鸿富锦精密工业（深圳）有限公司 | Projector |
| US20100202129A1 (en) * | 2009-01-21 | 2010-08-12 | Abu-Ageel Nayef M | Illumination system utilizing wavelength conversion materials and light recycling |
| JP2012128121A (en) * | 2010-12-14 | 2012-07-05 | Seiko Epson Corp | Illumination device and projector |
| US20120201030A1 (en) * | 2011-02-07 | 2012-08-09 | Intematix Corporation | Photoluminescence color wheels |
| JP5842162B2 (en) * | 2011-03-23 | 2016-01-13 | パナソニックＩｐマネジメント株式会社 | Light source device and image display device using the same |
| JP5440548B2 (en) * | 2011-04-28 | 2014-03-12 | カシオ計算機株式会社 | Projection apparatus, projection method, and program |
| CN102540679B (en) * | 2012-02-22 | 2014-10-29 | 海信集团有限公司 | Light source device, light source generation method and laser projector comprising light source device |
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Commission number: 4W104244 Conclusion of examination: Claims 1-3, 8, 9, the technical scheme of claim 1-3 and 8 contained in claim 10 is invalid; and the patent is valid on the basis of claim 4-7 and claim 10, including the technical scheme of claim 4-7. Decision date of declaring invalidation: 20161026 Decision number of declaring invalidation: 30283 Denomination of invention: Light source device, light source generation method and laser projector with light source device Granted publication date: 20150422 Patentee: HISENSE Co.,Ltd. |