WO2019037329A1 - 投影*** - Google Patents
投影*** Download PDFInfo
- Publication number
- WO2019037329A1 WO2019037329A1 PCT/CN2017/114736 CN2017114736W WO2019037329A1 WO 2019037329 A1 WO2019037329 A1 WO 2019037329A1 CN 2017114736 W CN2017114736 W CN 2017114736W WO 2019037329 A1 WO2019037329 A1 WO 2019037329A1
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- Prior art keywords
- light
- region
- optical path
- primary color
- primary
- Prior art date
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Classifications
-
- 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
- G02B26/007—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light
- G02B26/008—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light in the form of devices for effecting sequential colour changes, e.g. colour wheels
-
- 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
- G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
- G02B27/102—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources
- G02B27/1026—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources for use with reflective spatial light modulators
-
- 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
- G02B27/14—Beam splitting or combining systems operating by reflection only
- G02B27/144—Beam splitting or combining systems operating by reflection only using partially transparent surfaces without spectral selectivity
-
- 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
- G03B21/005—Projectors using an electronic spatial light modulator but not peculiar thereto
- G03B21/008—Projectors using an electronic spatial light modulator but not peculiar thereto using micromirror devices
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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
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2066—Reflectors in illumination beam
-
- G—PHYSICS
- 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
- G03B21/208—Homogenising, shaping of the illumination light
-
- 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
- G03B33/00—Colour photography, other than mere exposure or projection of a colour film
- G03B33/08—Sequential recording or projection
Definitions
- the present invention relates to the field of projection display, and more particularly to a light source system and a projection system to which the light source system is applied.
- the single SLM projection system includes an excitation light source 101, a wavelength conversion device 102, and a filter.
- DMD Digital Micromirror Device
- the wavelength conversion device 102 that excites the light source 101 to emit excitation light to excite the rotation generates the stimulated illumination light of the sequence, and the filter wheel 103 synchronizes with the wavelength conversion device 102 and filters the illumination light.
- the filtered illumination light is homogenized by the homogenizing device 105 and totally reflected at the TIR prism 107 to illuminate the DMD chip 106.
- the DMD chip 106 receives the image signal to modulate the illumination light to form image light, and the image light is then emitted through the TIR prism 107.
- a projection lens (not shown).
- the surface structure of the wavelength conversion device 102 and the filter wheel 103 is as shown in FIG. 2.
- the excitation light excites the wavelength conversion device 102 to generate B+Y sequence light, which is filtered by the filter wheel 103 to form blue light + red light + green.
- Sequence light of light (B+R+G).
- the emission spectrum of Y covers the spectral regions of R and G, so that R light and G light can be intercepted from the Y spectrum.
- the filter wheel 103 is turned to the G filter region R, the R light is reflected and lost, when the filter wheel 103 After switching to the R filter zone, the G light is reflected and lost, and it can be seen from Fig. 3 that the luminous flux lost by G light occupies most of the Y light, about 80%. Therefore, in the current technology, the loss of luminous flux is large, and the light efficiency of the system is low.
- the present invention provides a projection system with high utilization of light energy.
- the present invention provides a projection system, including:
- a light emitting device configured to provide the first light and the second light that are sequentially emitted
- the light splitting system includes:
- a light splitting device configured to divide the first light into first primary light and second primary light, and divide the second light into two third primary colors, and at first The first primary color light is emitted along the first optical path, the second primary color light is emitted along the second optical path, and the first primary color light is emitted along the second optical path in the second order.
- the second primary color light is emitted along the first optical path, and the two third primary color lights are respectively emitted along the first optical path and the second optical path in a third sequence;
- a spatial light modulator comprising at least a first region and a second region, and the first optical path along the first optical path, the second sequence, and the third sequence
- the first primary color light, the second primary color light, and the third primary color light enter the first region, and are modulated by the first region into image light, along the second optical path according to the first sequence
- the second primary color light, the first primary color light and the third primary color light emitted from the second order and the third order enter the second region, and are modulated by the second region into image light;
- an image processing apparatus configured to divide an image signal to be output to the spatial light modulator into two groups corresponding to the first region and the second region, and change at least one of the image signals The sequence is matched to the order of the first, second, and third primary colors received by the region corresponding to the set of image signals.
- the projection system provided by the embodiment of the invention has the advantages that: at least two optical channels are provided, and the single spatial light modulator can modulate at least two incident lights with the same engraving, so that the reflected light can be realized. Recycling is performed to avoid the light loss of the spectroscopic device, thereby improving the utilization of light energy, and the projection system has a small structure and a low cost.
- FIG. 1 is a schematic structural view of a single SLM projection system in the prior art.
- FIG. 2 is a surface structural view of a wavelength conversion device and a filter wheel of the single SLM projection system shown in FIG. 1.
- FIG. 3 is a spectrum diagram of ⁇ , R, G light.
- FIG. 4 is a block schematic diagram of a projection system in a first embodiment of the present invention.
- FIG. 5 is a specific implementation architecture diagram of the projection system shown in FIG. 4.
- FIG. 6 is a schematic view showing the surface structure of a wavelength conversion device and a filter wheel of the projection system shown in FIG. 5.
- FIG. 7 is a schematic diagram of a primary color light sequence illuminated to a spatial light modulator in the projection system of FIG. 5.
- FIG. 8 is a control diagram of generating an image output by the projection system shown in FIG. 5.
- FIG. 9 is a block diagram showing the image signal processing apparatus shown in FIG. 8.
- FIG. 10 is a schematic diagram of a primary color light sequence and an image signal sequence of two regions of a spatial light modulator in the projection system of FIG. 5.
- FIG. 11 is a block diagram showing another embodiment of the image processing apparatus shown in FIG. 8.
- FIG. 12 is another detailed implementation architecture diagram of the projection system shown in FIG. 4.
- FIG. 13 is a schematic diagram of the incident light modulator of the primary color light entering the spatial light from two different angles in the projection system of FIG.
- FIG. 14 is a schematic diagram of a microlens array of the projection system shown in FIG. 12.
- FIG. 15 is a schematic diagram showing the micromirror unit of the spatial light modulator of the projection system shown in FIG. 5 in a state of being closed, wherein (a) is a " ⁇ " state, and (b) is an "off” state. [0029] FIG.
- FIG. 16 is a schematic view showing the substrate electrode of the spatial light modulator of the projection system shown in FIG. 13 in a twilight state, wherein (a) is in a " ⁇ " state and (b) is in an "off” state. [0030] FIG.
- FIG. 4 is a block schematic diagram of a projection system in an embodiment of the present invention.
- the projection system 40 includes a light emitting device 400, a spectroscopic system 403, a homogenizing device 404, an optical relay system 405, a spatial light modulator 406, and an image processing device 407.
- the light emitting device 400 includes a light source 401 for providing excitation light, and a wavelength conversion device 402 for receiving the excitation light and providing the first light and the second light that are sequentially emitted.
- the light splitting system 403 is configured to divide the first light and the second light into at least two primary colors, and direct the primary light to the light homogenizing device 404, where the light homogenizing device 404 is configured to The primary color light is homogenized, and the optical relay system 405 is used to direct the primary color light emitted from the homogenizing device 404 to a corresponding region of the spatial light modulator 406, the spatial light modulator 406 including two regions A and B. Each of the regions B is used to modulate the received primary color light in accordance with an image signal output from the image processing device 407, thereby obtaining desired color image light.
- the spatial light modulator 406 can be a spatial light modulator of the type LCD, LCOS or DMD.
- the image processing device 407 is configured to slice the two regions A and B of the image signal corresponding to the spatial light modulator 406 into two groups before outputting the image signal to the spatial light modulator 406, and to at least one set of image information. The sequence is changed in accordance with the order of the primary light that is irradiated to the corresponding area A or B.
- the image processing device 407 may be a software program that is operated by a single chip microcomputer, a processor, or the like to perform the above functions.
- the above functions of the image processing apparatus 407 can also be implemented by a suitable hardware circuit.
- FIG. 5 is a specific implementation architecture diagram of the projection system 40.
- the light source 401 is a blue laser light source 401a
- the wavelength conversion device 402 is a fluorescent color wheel 402a
- the light splitting system 403 includes a filter wheel 4031 and a mirror 4032.
- 404 is a microlens array 404a
- the light modulator 406 is a DMD spatial light modulator 406a.
- the fluorescent color wheel 402a is divided into a first wavelength region 4021a along its circumferential direction and a second wavelength region 4022a, the first wavelength region 4021a is configured to be excited by the excitation light to generate the first light, and the second wavelength region 4022a is configured to be excited by the excitation light to generate the second light or for transmitting
- the excitation light forms the second light.
- the first wavelength region 4021a is provided with a wavelength converting material, for example, a yellow phosphor is disposed, and the second wavelength region 4022a is a light transmitting region, and the light transmitting region can transmit a blue laser.
- the fluorescent color wheel 402a periodically rotates.
- the blue laser light is absorbed by the yellow phosphor and the yellow phosphor is excited to generate yellow light, which is the first light, when the excitation light is irradiated
- the second wavelength region 4022a is transmitted by a blue laser light, which is the second light.
- the light source 401 is not limited to a blue laser, and may be other color lasers or other light sources such as LEDs.
- the filter wheel 4031 is configured to divide the first light into first primary light and second primary light, and to divide the second light into at least two third primary colors.
- the filter wheel 4031 is divided into a first primary color region 4032, a second primary color region 4033, and a third primary color region 4034 along a circumferential direction thereof, and the first primary color region 4032 is configured to divide the first light into the first a first primary color light emitted from the optical path and a second primary color light emitted along the second optical path.
- the first primary color region 4032 transmits the first primary color light and reflects the second primary color light
- the first primary color light and the second primary color light are respectively along the first optical path and the second optical path and finally exit to the DMD spatial light modulator 406a
- the second primary color region 4033 is configured to divide the first light into a first primary color light emitted from the two optical paths and a second primary color light emitted along the first optical path.
- the second primary color region 4033 transmits the second primary color light and reflects the first primary color light.
- the second primary color light and the first primary color light are respectively along the first optical path and the second optical path and finally output to the DMD spatial light modulator 406a;
- the third primary color region 4034 is configured to divide the second light into separate Two roads along the first light path and the second light path
- the third primary color region 4034 transmits and reflects the two third primary colors, and the two third primary colors respectively follow the first optical path and the second optical path and finally exit to the A DMD spatial light modulator 406a is described.
- the filter wheel 4031 rotates synchronously with the fluorescent color wheel 402a, and the first wavelength region 4021a of the fluorescent color wheel 402a corresponds to the first primary color region 4032 and the second primary color region 4033 of the filter wheel 4031.
- the second wavelength region 4022a of the color wheel 402a corresponds to the third primary color region 4034 of the filter wheel 4031, that is, the first wavelength region 4021a of the fluorescent color wheel 402a is excited to generate a yellow pupil, and the yellow light is incident on the filter wheel 4031.
- the yellow light is divided into red light and green light, wherein red light is transmitted in the first primary color region 4032 and sent to the first optical path to the D A first region A of the MD spatial light modulator 406a, the red light is the first primary color light, and the green light is reflected in the first primary color region 4032 and sent along the second optical path to a first portion of the DMD spatial light modulator 406a.
- the green light is the second primary color light.
- the second primary color region 4033 reflects and is sent along the second optical path to the second region B of the spatial light modulator 406a.
- the second wavelength region 4022a of the fluorescent color wheel 402a transmits the blue laser light, and the filter wheel 4031 is transferred to the third primary color region 4034.
- the third primary color region 4034 is provided with a color correction sheet, and the color correction sheet is a semi-reflective half. a transmissive film or a polarizing plate, the blue light is partially transmitted and partially reflected in the third primary color region 4034, and the transmitted blue light is sent along the first optical path to the first region A of the DMD spatial light modulator 406a.
- the reflected blue light is sent along the second optical path to the second region B of the DMD spatial light modulator 406a, and the blue light is the third primary color light.
- the primary color order of the two regions VIII and B of the DMD spatial light modulator 406a is as shown in FIG. 7, and the primary color order of the region A is R (red light) G (green light) B ( Blu-ray) ... RGB , the primary color of the region B is GRB...GRB, and the regions A and B are mixed into white light W.
- the yellow phosphor since the yellow phosphor has a high light conversion efficiency, the yellow phosphor is excited by the blue laser to generate yellow light, and then the yellow light is divided into red light and green light, and the blue laser light is The blue light, which is composed of three primary colors of red, green and blue, is emitted to the DMD spatial light modulator 406a, so that red light is not required from the red fluorescent powder with low light conversion efficiency, thereby improving the utilization of light energy.
- the light reflected by the filter wheel 4031 can be recovered and emitted to the DMD spatial light modulator 406a, thereby avoiding the loss of the splitting light, thereby improving the utilization of light energy.
- the first primary color light, the second primary color light, and the third primary color light are not limited to red light, green light, and blue light, respectively.
- the embodiment is merely exemplified by the first primary color light and the second primary color light.
- the third primary color light may also be green light, red light, blue light, or other combination of red, green and blue light, respectively.
- the first light and the second light are not limited to yellow light and blue light, respectively, as long as three primary colors of red, green, and blue can be obtained by splitting light.
- both the first light and the second light are exemplified by yellow light and blue light
- the first primary color light, the second primary color light, and the third primary color light are respectively exemplified by red light, green light, and blue light.
- the microlens array 404a includes a first partial microlens array 4041a and a second partial microlens array 4042a
- the optical relay system 405 includes a first optical relay system 4051 and a second optical relay system.
- 4052, the first part of the microlens array 4041a and the first optical relay system 4051 are disposed on the first optical path
- the mirror 4032, the second partial microlens array 4042a and the second optical relay system 4052 are disposed on the second optical path.
- Projection system 40 further includes a prism set 408 disposed above DMD spatial light modulator 406a.
- the prism group 408 includes a first side, that is, a first side 4081, a second side opposite the first side 4081, that is, a second side 4082, and is disposed between the first side 4081 and the second side 4082 for emitting image light.
- the third side 4083 of the projection lens (not shown).
- the primary color light passing through the first optical path enters the prism group 408 via the second side surface 4082, is reflected by the prism group 408 to the area A of the DMD spatial light modulator 406a, and the primary color light passing through the second optical path enters the prism group via the first side surface 4081. 408, reflected by prism group 408 to region B of DMD spatial light modulator 406a.
- the optical relay system 405 is configured by a lens, a mirror, or the like in a predetermined arrangement.
- the primary color light sequence on the two regions, B irradiated to the spatial light modulator 406 will be different, for example, the primary color light order on the region A is RGB...RGB, and the region The primary color light order on B is GRB...GRB, therefore, the primary color light sequence of at least one region A or B will be different from the image signal sequence to be output to the spatial light modulator 406, if to be output to the spatial light modulator
- the image signal sequence on 406 is RGB...RGB, and the sequence of image signals to be output to region B needs to be modified to coincide with the primary color pupil sequence GRB...GRB on region B.
- the image processing apparatus 407 includes a signal segmentation module 4071 and a signal sequencer module 4072.
- the signal segmentation module 407 divides the regions A and B according to the space light modulator 406.
- the image signal is divided into two groups a and b, wherein the group a signal corresponds to the area A of the spatial light modulator 406, and the group b signal corresponds to the area B of the spatial light modulator 406.
- the a group of signals is output by the signal segmentation module 4071 to the region A, b of the spatial light modulator 406.
- the signal is output to the signal sequence module 4072 by the signal segmentation module 4071, and the signal sequence module 4072 converts the sequence of the b group signals to match the primary color light sequence of the region B, and outputs the sequenced b group signals to the spatial light modulation.
- Area B of the 406. Please refer to FIG. 10, the area A primary light order is RGB...RGB, and the image signal sequence output to the area A is also RGB...RGB, which matches the primary color order of the area A.
- the primary color order of the region B is GRB...GRB, and the image signal sequence output to the region B is also transformed into GRB...GRB, which matches the primary color order of the region B.
- the areas A, B of the spatial light modulator 40 6 respectively modulate the received primary color light in accordance with the received image signal to obtain the desired color image light.
- the projection system 40 further includes a control device 409 that controls the wavelength conversion device 402 to synchronize with the filter wheel 403 and simultaneously sends a feedback signal to the spatial light modulator 406 to enable spatial light modulation.
- the primary color light in the 406 is synchronized with the image signal.
- the image processing device 408 further includes a signal value correction module 4073, which is still to be output to the region of the DMD spatial light modulator.
- the signal value of the image signal of B needs to be corrected as an example.
- the signal value correction module 4073 corrects the signal value of the image signal to be output to the region B according to the angle change amplitude of the primary light incident on the DMD spatial light modulator. For example, with respect to the projection system 40 shown in FIG.
- the signal value (G', R', B') is such that the signal value of the image signal output to the area B matches the incident angle of the primary color light, thereby outputting the correct image light.
- FIG. 12 is another structural diagram of another specific implementation of the projection system 40 shown in FIG.
- FIG. 13 the main difference between the specific embodiment and the specific embodiment shown in FIG. 5 is that the two primary colors obtained by the splitting system 403 are not respectively entered into the prism group 508 by the opposite sides of the prism group 508.
- Phase The arrangement of the first optical relay system 5051 of the optical relay system 505 is slightly different from the arrangement of the first optical relay system 4051, compared to the specific embodiment shown in FIG.
- the example shortens the optical path from the microlens array 504 to the spatial light modulator 506, which is advantageous in reducing the volume of the projection system 40.
- the two primary colors of light enter the prism group 508 from the two adjacent sides 5081, 5082 of the prism group 508 and are respectively reflected by the prism group 508 into the regions A, B of the spatial light modulator 506, they are projected to the region.
- the spot size and the aspect ratio of A and B are different. To avoid this, the spot size and the aspect ratio of the projections to the areas A and B are the same.
- the microlens array is used.
- the microlens employed in the first partial microlens array 5041 of 504 is different in size from the microlens employed in the second partial microlens array 5042, thereby modulating the spot size and aspect ratio projected to regions A, B to be the same.
- the microlens array 504 can also be constructed from two separate microlens arrays.
- the substrate of the DMD spatial light modulator regions A and B may also be passed.
- the electrode is modified so that all the micromirror units of the existing DMD spatial light modulator are set to rotate to the a direction ⁇ , and rotate to the b direction ⁇ to the off state, and change to the micro mirror unit 151 in the area A. Rotating to the a direction is ⁇ , the rotation to the b direction is off, and the micromirror unit 152 in the area B is rotated to the b direction ⁇ , and the rotation to the a direction is off.
- the substrate electrode can be The power unit or transmission that drives the rotation of the micromirror unit 152 is changed to reverse the light state of the micromirror unit 152 of the region B.
- the angle at which the primary color light is incident on the region B is different from the angle of the incident angle change in the prior art, and the rotation direction and the angle of the micromirror unit 152 in the region B may also be changed correspondingly to match.
- the angle of the primary light incident region B is different from the angle of the incident angle change in the prior art, and the rotation direction and the angle of the micromirror unit 152 in the region B may also be changed correspondingly to match.
- the micromirror unit 151 of the area A is rotated to a first direction (as in the a direction exemplified above), and the state is ⁇ , rotated to a second direction (as in the b direction exemplified above)
- the ⁇ state is off
- the micromirror unit 152 of the region B is rotated to a third direction
- the state is ⁇
- the state is rotated to a fourth direction ⁇
- the third direction is different from the first direction
- the fourth direction is different.
- the second direction is therefore different from the prior art DMD light modulator to match the primary light to different regions of the DMD light modulator from different angles, and also to match the angle of the primary light to the two regions of the DMD light modulator.
- the three directions may be the same as the second direction, or may be different from the second direction, and the fourth direction may be It is the same as the first direction, and may be different from the fourth direction.
- the substrate electrodes of the regions A and B are driven, and the B is performed simultaneously.
- Two-dimensional rotation wherein one dimension is rotated about an axis parallel to the substrate electrode, and the other dimension is rotated about an axis perpendicular to the substrate electrode 163.
- the angles at which the micromirror units 161 and 162 of the regions A and B correspond to the incident light of the primary color are switched between the states of ⁇ and OFF.
- the substrate electrode 163 can be set to rotate around one, two or three dimensions as needed to match the angle at which the primary light is incident, switching between the two states.
- the projection system of the present invention is provided with at least two light paths corresponding to different regions of a single spatial light modulator, and a single spatial light modulator can modulate at least two incident lights with the same engraving, thus, The reflected light can be recovered to avoid the light loss of the splitting device, thereby improving the utilization of light energy, and the projection system uses only a single spatial light modulator, and the structure volume is small and the cost is low.
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Abstract
一种投影***(40),包括:发光装置(400)提供时序出射的第一光和第二光;分光***(403)将第一光分为第一基色光和第二基色光、将第二光分为两路第三基色光,在第一时序将第一基色光沿第一光路出射、将第二基色光沿第二光路出射,在第二时序将第一基色光沿第二光路出射、将第二基色光沿第一光路出射,在第三时序将两路第三基色光分别沿第一光路和第二光路出射;空间光调制器(406),包括第一区域(A)、第二区域(B),沿第一光路出射的基色光进入第一区域(A),沿第二光路出射的基色光进入第二区域(B);及图像处理装置(407),将待输出的图像信号对应第一区域(A)与第二区域(B)分成两组,并改变其中至少一组的序列以匹配对应区域所接收的基色光的时序。可避免分光时的光损失,提高光能利用率。
Description
投影***
技术领域
[0001] 本发明涉及投影显示领域, 尤其涉及一种光源***及应用所述光源***的投影 ***。
背景技术
[0002] 目前, 蓝光 +黄光 (Y+B) 光源形式的方案一般用于三片式空间光调制器 (3SL M) 或者两片式空间光调制器 (2SLM) ***, 但是这些***的结构庞大, 制作 工艺复杂, 价格贵。 在单 SLM***中, 由于红色荧光粉的效率远低于从黄色荧 光中截取到红光的效率, 因此在将 Y+B光源形式应用于单 SLM***吋, 需将 Y进 行分解得到绿光 (G) &红光 (R) , 得到 G吋 R被反射损失掉, 得到 R吋 G被反射 损失掉, 效率较低。
技术问题
[0003] 在现有的单 SLM投影***, 以 DLP (Digital Light Processing, 数字光处理) 技 术为例, 如图 1所示, 所述单 SLM投影***包括激发光源 101、 波长转换装置 102 、 滤光轮 103、 光中继*** 104、 匀光器件 105、 DMD (Digital Micromirror Device, 数据微镜装置) 芯片 106以及 TIR (Total Internal Reflection, 全反射) 棱 镜 107。
[0004] 激发光源 101发射激发光激发旋转的波长转换装置 102产生吋序的受激照明光, 滤光轮 103与波长转换装置 102同步并对照明光进行滤波。 经过滤波的照明光经 匀光器件 105均匀化、 并在 TIR棱镜 107处全反射后照射 DMD芯片 106, DMD芯片 106接收图像信号对照明光进行调制形成图像光, 图像光再经由 TIR棱镜 107出射 至一投影镜头上 (图未示) 。
[0005] 波长转换装置 102与滤光轮 103的表面结构如图 2所示, 激发光激发波长转换装 置 102产生 B+Y的序列光, 经过滤光轮 103滤波后形成蓝光 +红光 +绿光 (B+R+G ) 的序列光。 如图 3, Y的发射谱中覆盖了 R与 G的光谱区域, 因此可以从 Y光谱 中截取 R光与 G光。 当滤光轮 103转至 G滤光区吋, R光被反射损失, 当滤光轮 103
转至 R滤光区吋, G光则会被反射损失, 并且从图 3可以看出 G光损失的光通量占 据了 Y光的大部分, 约 80%。 所以在目前的技术中, 损失的光通量较多, ***的 光效较低。
问题的解决方案
技术解决方案
[0006] 鉴于上述状况, 本发明提供一种光能利用率高的投影***。
[0007] 本发明提供一种投影***, 包括:
[0008] 发光装置, 用于提供吋序出射的第一光和第二光;
[0009] 分光***, 所述分光***包括:
[0010] 分光装置, 所述分光装置用于将所述第一光分为第一基色光和第二基色光、 以 及将所述第二光分为两路第三基色光, 并在第一吋序将所述第一基色光沿第一 光路出射、 将所述第二基色光沿第二光路出射, 在第二吋序将所述第一基色光 沿所述第二光路出射、 将所述第二基色光沿所述第一光路出射, 以及在第三吋 序将所述两路第三基色光分别沿所述第一光路和所述第二光路出射;
[0011] 空间光调制器, 所述空间光调制器至少包括第一区域与第二区域, 沿所述第一 光路按所述第一吋序、 第二吋序、 第三吋序出射的所述第一基色光、 第二基色 光与第三基色光进入所述第一区域、 并被所述第一区域调制成图像光出射, 沿 所述第二光路按所述第一吋序、 第二吋序、 第三吋序出射的所述第二基色光、 第一基色光与第三基色光进入所述第二区域、 并被所述第二区域调制成图像光 出射; 及
[0012] 图像处理装置, 所述图像处理装置用于将待输出至所述空间光调制器的图像信 号对应所述第一区域与第二区域分成两组, 并改变其中至少一组图像信号的序 列以匹配该组图像信号对应的区域所接收的所述第一、 第二、 第三基色光的吋 序。
发明的有益效果
有益效果
[0013] 本发明实施例提供的投影***的优点在于: 设置有至少两个光通道, 单个空间 光调制器可以同一吋刻对至少两个入射光进行调制, 如此, 可以实现对反射光
进行回收以避免分光装置分光吋的光损失, 从而提高了光能利用率, 且该投影 ***结构体积较小, 成本较低。
[0014]
对附图的简要说明
附图说明
[0015] 图 1为现有技术中的单 SLM投影***的结构示意图。
[0016] 图 2为图 1所示单 SLM投影***的波长转换装置与滤光轮的表面结构图。
[0017] 图 3为丫、 R、 G光的光谱图。
[0018] 图 4为本发明第一种实施方式中的投影***的方框示意图。
[0019] 图 5为图 4所示投影***的一种具体实施架构图。
[0020] 图 6为图 5所示投影***的波长转换装置与滤光轮的表面结构示意图。
[0021] 图 7为图 5所示投影***中照射至空间光调制器的基色光吋序示意图。
[0022] 图 8为图 5所示投影***生成图像输出的控制示意图。
[0023] 图 9为图 8所示的图像信号处理装置的模块示意图。
[0024] 图 10为图 5所示投影***中空间光调制器两区域的基色光吋序与图像信号序列 示意图。
[0025] 图 11为图 8所示的图像处理装置的另一种实施方式的模块示意图。
[0026] 图 12为图 4所示投影***的另一种具体实施架构图。
[0027] 图 13为图 12所示投影***中基色光从两个不同角度入射空间光调制器的示意图
[0028] 图 14为图 12所示投影***的微透镜阵列的示意图。
[0029] 图 15为图 5所示投影***的空间光调制器的微镜单元呈现幵关状态的示意图, 其中 (a)为"幵"状态, (b)为"关"状态。
[0030] 图 16为图 13所示投影***的空间光调制器的基板电极呈现幵光状态的示意图, 其中 (a)为"幵"状态, (b)为"关"状态。
本发明的实施方式
[0031] 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, 本领域普通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。
[0032] 除非另有定义, 本文所使用的所有的技术和科学术语与属于本发明的技术领域 的技术人员通常理解的含义相同。 本文所使用的术语"或 /及"包括一个或多个相 关的所列项目的任意的和所有的组合。
[0033] 请参阅图 4所示, 图 4是本发明一种实施方式中的投影***的方框示意图。 该投 影*** 40包括发光装置 400、 分光*** 403、 匀光装置 404、 光中继*** 405、 空 间光调制器 406与图像处理装置 407。 所述发光装置 400包括光源 401与波长转换 装置 402, 所述光源 401用于提供激发光, 所述波长转换装置 402用于接收所述激 发光并提供吋序出射的第一光和第二光, 所述分光*** 403用于将第一光与第二 光分别分为至少两路基色光, 并将所述基色光分别引导出射至匀光装置 404, 所 述匀光装置 404用于对所述基色光均匀化, 所述光中继*** 405用于将从匀光装 置 404出射的基色光分别引导至空间光调制器 406的对应区域, 所述空间光调制 器 406包括两个区域 A与 B, 每一区域 、 B用于根据图像处理装置 407输出的图像 信号, 对接收的所述基色光进行调制, 从而获得所需的彩色图像光。 所述空间 光调制器 406可以为 LCD、 LCOS或 DMD等类型的空间光调制器。 所述图像处理 装置 407用于在输出图像信号至空间光调制器 406之前, 将图像信号对应空间光 调制器 406的两个区域 A、 B切分为两组, 并对至少一组图像信息的序列根据照射 到对应的区域 A或 B的基色光的吋序进行改变。 在本实施方式中, 所述图像处理 装置 407可以为软件程序, 通过单片机、 处理器等运行来完成上述功能。 当然在 其他实施方式中, 所述图像处理装置 407的上述功能也可通过合适的硬件电路来 实现。
[0034] 请参阅图 5所示, 为投影*** 40的一种具体实施架构图。 在本具体实施例中, 所述光源 401为蓝色激光光源 401a, 所述波长转换装置 402为荧光色轮 402a, 所述 分光*** 403包括滤光轮 4031与反射镜 4032, 所述匀光装置 404为微透镜阵列 404a , 所述光调制器 406为 DMD空间光调制器 406a。
[0035] 请同吋参阅图 6所示, 荧光色轮 402a沿其圆周方向被切分为第一波长区 4021a和
第二波长区 4022a, 第一波长区 4021a用于受所述激发光激发产生所述第一光, 第 二波长区 4022a用于受所述激发光激发产生所述第二光或用于透射所述激发光形 成所述第二光。 在本实施例中, 第一波长区 4021a设置有波长转换材料, 比如, 设置黄色荧光粉, 第二波长区 4022a为透光区, 该透光区可以透射蓝色激光。 荧 光色轮 402a周期性转动, 当激发光照射到第一波长区 4021a吋, 蓝色激光被黄色 荧光粉吸收并激发黄色荧光粉产生黄光, 该黄光为第一光, 当激发光照射到第 二波长区 4022a吋, 蓝色激光透射, 该蓝光为第二光。
[0036] 当然, 光源 401不限于蓝色激光, 还可以为其它颜色激光或是 LED等其它光源
[0037] 所述滤光轮 4031用于将所述第一光分为第一基色光和第二基色光, 以及用于将 所述第二光分为至少两路第三基色光。 滤光轮 4031沿其圆周方向被切分为第一 基色区 4032、 第二基色区 4033及第三基色区 4034, 所述第一基色区 4032用于将 所述第一光分为沿第一光路出射的第一基色光和沿第二光路出射的第二基色光 , 在本实施方式中, 所述第一基色区 4032透射所述第一基色光和反射所述第二 基色光, 所述第一基色光和第二基色光分别沿第一光路与第二光路并最终出射 至所述 DMD空间光调制器 406a; 所述第二基色区 4033用于将所述第一光分为沿 第二光路出射的第一基色光和沿第一光路出射的第二基色光, 在本实施方式中 , 所述第二基色区 4033透射所述第二基色光和反射所述第一基色光, 所述第二 基色光和第一基色光分别沿第一光路与第二光路并最终出射至所述 DMD空间光 调制器 406a; 所述第三基色区 4034用于将所述第二光分为分别沿第一光路和第二 光路出射的两路第三基色光, 在本实施方式中, 所述第三基色区 4034透射和反 射所述两路第三基色光, 所述两路第三基色光分别沿第一光路与第二光路并最 终出射至所述 DMD空间光调制器 406a。
[0038] 在本实施方式中, 滤光轮 4031与荧光色轮 402a同步旋转, 荧光色轮 402a的第一 波长区 4021a对应滤光轮 4031的第一基色区 4032和第二基色区 4033, 荧光色轮 402 a的第二波长区 4022a对应滤光轮 4031的第三基色区 4034, 即荧光色轮 402a的第一 波长区 4021a受激发产生黄光吋, 黄光入射到滤光轮 4031的第一基色区 4032, 黄 光分为红光和绿光, 其中, 红光在所述第一基色区 4032透射并沿第一光路送至 D
MD空间光调制器 406a的一第一区域 A, 红光为所述第一基色光, 绿光在所述第 一基色区 4032反射并沿第二光路送至 DMD空间光调制器 406a的一第二区域 B, 绿 光为第二基色光。 当滤光轮 4031转至第二基色区 4033吋, 绿光在所述第二基色 区 4033透射并沿所述第一光路送至空间光调制器 406a所述第一区域 A, 红光在所 述第二基色区 4033反射并沿所述第二光路送至空间光调制器 406a所述第二区域 B 。 荧光色轮 402a的第二波长区 4022a透射蓝色激光吋, 滤光轮 4031转至第三基色 区 4034, 所述第三基色区 4034设置有修色片, 所述修色片为半反射半透射膜片 或偏振片, 蓝光在所述第三基色区 4034部分被透射、 另部分被反射, 透射的蓝 光沿所述第一光路送至 DMD空间光调制器 406a的所述第一区域 A, 反射的蓝光 沿所述第二光路送至 DMD空间光调制器 406a的所述第二区域 B, 蓝光为第三基色 光。 在本实施例中, DMD空间光调制器 406a的两区域八、 B上的基色光吋序如图 7所示, 区域 A的基色光吋序为 R (红光) G (绿光) B (蓝光) ...RGB , 区域 B 的基色光吋序为 GRB...GRB , 区域 A、 B各自吋域上混成白光 W。
[0039] 因此, 一方面, 由于黄色荧光粉的光转换效率较高, 通过蓝色激光激发黄色荧 光粉产生黄光, 再将黄光分为红光和绿光, 并与蓝色激光, 即蓝光, 组成红、 绿、 蓝三种基色光吋序出射至 DMD空间光调制器 406a, 无需从光转换效率低的 红色荧光粉获得红光, 从而提高了光能利用率。 另一方面, 滤光轮 4031反射的 光可回收出射至 DMD空间光调制器 406a, 避免了分光吋光的损失, 从而提高了 光能利用率。
[0040] 当然, 第一基色光、 第二基色光、 第三基色光不限于分别是红光、 绿光、 蓝光 , 本实施方式仅是以此举例说明, 第一基色光、 第二基色光、 第三基色光还可 以分别是绿光、 红光、 蓝光, 或者红绿蓝光的其他组合方式。 第一光和第二光 也不限于分别是黄光和蓝光, 只要能通过分光得到红、 绿、 蓝三种基色光即可 。 在下文中, 为了方便描述, 第一光和第二光均以黄光和蓝光举例, 第一基色 光、 第二基色光、 第三基色光均分别以红光、 绿光、 蓝光举例。
[0041] 在本具体实施例中, 微透镜阵列 404a包括第一部分微透镜阵列 4041a与第二部 分微透镜阵列 4042a, 光中继*** 405包括第一光中继*** 4051与第二光中继*** 4052, 第一部分微透镜阵列 4041a与第一光中继*** 4051设置于第一光路上, 反
射镜 4032、 第二部分微透镜阵列 4042a与第二光中继*** 4052设置于第二光路上 。 投影*** 40进一步包括设置于 DMD空间光调制器 406a上方的棱镜组 408。 所述 棱镜组 408包括第一面即第一侧面 4081、 与第一侧面 4081相对的第二面即第二侧 面 4082及设置于第一侧面 4081与第二侧面 4082之间、 用于出射图像光至投影镜 头 (图未示) 的第三面 4083。 经由第一光路过来的基色光经第二侧面 4082进入 棱镜组 408, 被棱镜组 408反射至 DMD空间光调制器 406a的区域 A, 经由第二光 路过来的基色光经第一侧面 4081进入棱镜组 408, 被棱镜组 408反射至 DMD空间 光调制器 406a的区域 B。 在本实施方式中, 光中继*** 405由透镜、 反射镜之类 按一定的排布构成。
[0042] 通过上述实施例可以看出, 照射至空间光调制器 406的两区域 、 B上的基色光 吋序会呈现不同, 如区域 A上基色光吋序为 RGB...RGB , 而区域 B上基色光吋序 为 GRB...GRB , 因此, 至少有一区域 A或 B的基色光吋序会与待输出至空间光调 制器 406的图像信号序列不同, 如若待输出至空间光调制器 406上的图像信号序 列为 RGB...RGB , 则待输出至区域 B的图像信号序列需修改成与区域 B上的基色 光吋序 GRB...GRB—致。
[0043] 请参阅图 8与图 9所示, 图像处理装置 407包括信号切分模块 4071与信号变序模 块 4072, 信号切分模块 407根据空间光调制器 406上区域 A、 B的划分来将图像信 号分为 a、 b两组, 其中 a组信号对应空间光调制器 406的区域 A, b组信号对应空 间光调制器 406的区域 B。 仍以图像信号序列与区域 A的基色光吋序相同而与区域 B的基色光吋序不同为例说明, a组信号被信号切分模块 4071输出至空间光调制 器 406的区域 A, b组信号被信号切分模块 4071输出至信号变序模块 4072, 信号变 序模块 4072将 b组信号的序列变换以匹配区域 B的基色光吋序, 并输出变序后的 b 组信号至空间光调制器 406的区域 B。 请同吋参阅图 10所示, 所述区域 A基色光吋 序为 RGB...RGB , 输出至区域 A的图像信号序列亦为 RGB...RGB , 与区域 A的基 色光吋序匹配, 而区域 B的基色光吋序为 GRB...GRB , 输出至区域 B的图像信号 序列亦被变换为 GRB...GRB , 与区域 B的基色光吋序匹配。 所述空间光调制器 40 6的区域 A、 B分别根据接收的图像信号对接收的基色光进行调制, 从而获得所需 的彩色图像光。
[0044] 所述投影*** 40进一步包括一控制装置 409, 所述控制装置 409控制波长转换装 置 402与滤光轮 403同步, 同吋发送反馈信号给空间光调制器 406, 以使在空间光 调制器 406中基色光与图像信号同步。
[0045] 以上介绍的实施方式已适用于 LCOS与 LCD之类的空间光调制器, 然对与 DMD 类型的空间光调制器来说, 由于现有的 DMD空间光调制器的所有微镜单元均是 设置为旋转至 a方向吋为幵, 而旋转至 b方向吋为关, 微镜单元状态为幵吋将图像 光投射至投影镜头 (图未示) , 微镜单元状态为关吋将图像光避幵投影镜头, 因此, 对于现有的 DMD空间光调制器来说, 当入射 DMD空间光调制器的区域 A 、 B的基色光方向不同吋, 如: 当基色光从相对的两方向或其他不同的两个方向 分别进入 DMD空间光调制器的区域 A、 B吋, 待输出至至少其中一个区域的图像 信号的信号值需匹配基色光的入射角度进行修正, 以便 DMD空间光调制器两个 区域 A、 B均输出正确的图像光, 以形成正确的彩色图像。
[0046] 为适用于现有的 DMD空间光调制器, 请参阅图 11所示, 所述图像处理装置 408 还进一步包括一信号值修正模块 4073, 仍以待输出至 DMD空间光调制器的区域 B的图像信号的信号值需要修正为例进行说明, 信号值修正模块 4073根据基色光 入射 DMD空间光调制器的角度改变幅度修正待输出至区域 B的图像信号的信号 值。 例如, 针对图 5所示的投影*** 40来说, 基色光入射至区域 B的角度相比现 有技术中入射的角度发生了改变, 从而使区域 B的微镜单元旋转至 a方向吋, 微 镜单元将图像光避幵投影镜头, 而旋转至 b方向吋, 微镜单元反而将图像光透射 至投影镜头, 因此, 信号值修正模块 4073对待输出至区域 B的图像信号的信号值 进行互补修正, 如, 原图像信号值为 (G,R,B) ,则通过 (G,,R,,B,) =(255,255,25 5)-(G,R,B)得到待输出至区域 B的信号值 (G',R',B') , 以使输出至区域 B的图像 信号的信号值与基色光的入射角度匹配, 从而输出正确的图像光。
[0047] 请参阅图 12所示, 为图 4所示投影*** 40的另一种具体实施架构图。 请同吋结 合图 13, 本具体实施例与图 5所示具体实施例主要的不同在于, 由分光*** 403 分光后获得的两路基色光非由棱镜组 508的相对两侧面分别进入棱镜组 508并被 反射至空间光调制器 506的区域 A、 B, 而是由棱镜组 508的相邻两侧面 5081、 508 2进入棱镜组 508并被棱镜组 508分别反射进入空间光调制器 506的区域 A、 B。 相
应地, 光中继*** 505的第一光中继*** 5051的排布设置与第一光中继*** 4051 的排布设置稍有不同, 相比于图 5所示具体实施例, 本具体实施例缩短了由微透 镜阵列 504至空间光调制器 506的光程, 有利于减小投影*** 40的体积。
[0048] 此外, 由于两路基色光分别从棱镜组 508的两相邻侧面 5081、 5082进入棱镜组 5 08并被棱镜组 508分别反射进入空间光调制器 506的区域 A、 B, 因此投射至区域 A、 B的光斑尺寸以及长宽比不同, 为避免此种情况, 使投射至区域 A、 B的光斑 尺寸以及长宽比相同, 请参阅图 14所示, 在本实施方式中, 微透镜阵列 504的第 一部分微透镜阵列 5041采用的微透镜与第二部分微透镜阵列 5042采用的微透镜 的尺寸不同, 从而将投射至区域 A、 B的光斑尺寸以及长宽比调制为相同。 当然 在其他实施方式中, 微透镜阵列 504也可以是由两个独立的微透镜阵列构成。
[0049] 请参阅图 15所示, 对 DMD空间光调制器来讲, 在图像处理装置 408不包括信号 值修正模块 4073的情况下, 还可通过对 DMD空间光调制器区域 A、 B的基板电极 进行改进, 使其由现有 DMD空间光调制器所有微镜单元均设置为旋转至 a方向吋 为幵, 而旋转至 b方向吋为关的状态, 改变为区域 A中的微镜单元 151旋转至 a方 向吋为幵、 旋转至 b方向为关, 而区域 B中的微镜单元 152旋转至 b方向为幵、 旋 转至 a方向为关。 也就是说, 由于基色光入射至区域 B的角度相比现有技术中入 射的角度发生大幅度改变, 因此将区域 B的微镜单元 152的幵光状态反过来设置 , 例如, 可将基板电极 153上带动微镜单元 152旋转的动力单元或传动装置改变 , 使区域 B的微镜单元 152的幵光状态反置。
[0050] 可以理解, 针对基色光入射至区域 B的角度相比现有技术中入射的角度改变的 幅度不同, 所述区域 B中的微镜单元 152旋转方向、 角度亦可相应改变, 以匹配 基色光入射区域 B的角度。 因此, 总的来说, 区域 A的微镜单元 151在旋转至一第 一方向 (如上面例举的 a方向) 吋状态为幵、 旋转至一第二方向 (如上面例举的 b 方向) 吋状态为关, 区域 B的微镜单元 152在旋转至一第三方向吋状态为幵、 在 旋转至一第四方向吋状态为关, 第三方向不同于第一方向, 第四方向不同于第 二方向, 因此有别于现有技术中 DMD光调制器, 以匹配基色光从不同角度入射 DMD光调制器的不同区域, 另同样为匹配基色光入射 DMD光调制器两区域的角 度, 第三方向可以与第二方向相同, 也可以与第二方向不相同, 第四方向可以
与第一方向相同, 也可以与第四方向不相同。
[0051] 请参阅图 16所示, 为对 DMD空间光调制器区域 A、 B的基板电极进行改进的另 一例子, 在本实施例中, 区域 A、 B的基板电极驱动 、 B同吋进行两维的转动, 其中一维为绕平行于基板电极的轴转动, 另一维为绕垂直于基板电极 163的轴转 动。 从而使区域 A、 B的微镜单元 161与 162对应基色光入射的角度, 在幵与关两 种状态之间切换。
[0052] 可以理解, 基板电极 163可以根据需要设置为绕一维、 二维或三维进行转动, 以匹配基色光入射的角度, 在幵与关两种状态之间切换。
[0053] 综上所述, 本发明的投影***设置有至少两个光路径对应单个空间光调制器的 不同区域, 单个空间光调制器可以同一吋刻对至少两个入射光进行调制, 如此 , 可以实现对反射光进行回收以避免分光装置分光吋的光损失, 从而提高了光 能利用率, 且该投影***仅采用单个空间光调制器, 结构体积较小, 成本较低
[0054] 以上实施方式仅用以说明本发明的技术方案而非限制, 尽管参照以上较佳实施 方式对本发明进行了详细说明, 本领域的普通技术人员应当理解, 可以对本发 明的技术方案进行修改或等同替换都不应脱离本发明技术方案的精神和范围。
[0055]
Claims
[权利要求 1] 一种投影***, 其特征在于, 包括:
发光装置, 用于提供吋序出射的第一光和第二光; 分光***, 所述分光***包括:
分光装置, 所述分光装置用于将所述第一光分为第一基色光和第二基 色光、 以及将所述第二光分为两路第三基色光, 并在第一吋序将所述 第一基色光沿第一光路出射、 将所述第二基色光沿第二光路出射, 在 第二吋序将所述第一基色光沿所述第二光路出射、 将所述第二基色光 沿所述第一光路出射, 以及在第三吋序将所述两路第三基色光分别沿 所述第一光路和所述第二光路出射;
空间光调制器, 所述空间光调制器至少包括第一区域与第二区域, 沿 所述第一光路按所述第一吋序、 第二吋序、 第三吋序出射的所述第一 基色光、 第二基色光与第三基色光进入所述第一区域、 并被所述第一 区域调制成图像光出射, 沿所述第二光路按所述第一吋序、 第二吋序 、 第三吋序出射的所述第二基色光、 第一基色光与第三基色光进入所 述第二区域、 并被所述第二区域调制成图像光出射; 及
图像处理装置, 所述图像处理装置用于将待输出至所述空间光调制器 的图像信号对应所述第一区域与第二区域分成两组, 并改变其中至少 一组图像信号的序列以匹配该组图像信号对应的区域所接收的所述第 一、 第二、 第三基色光的吋序。
[权利要求 2] 如权利要求 1所述的投影***, 其特征在于, 所述发光装置包括: 激发光源, 所述激发光源用于产生激发光; 及
波长转换装置, 所述波长转换装置包括第一波长区和第二波长区, 所 述第一波长区用于接受所述激发光激发产生所述第一光, 所述第二波 长区用于接受所述激发光激发产生所述第二光或用于透射所述激发光 以形成所述第二光。
[权利要求 3] 如权利要求 2所述的投影***, 其特征在于, 所述激发光源为蓝色激 光, 所述第一波长区设置有黄色荧光材料, 所述第二波长区为透光区
如权利要求 1所述的投影***, 其特征在于, 所述分光装置包括滤光 轮, 所述滤光轮包括沿所述滤光轮周向分布的第一基色区、 第二基色 区及第三基色区, 所述第一基色区将所述第一光分为至少沿所述第一 光路出射的第一基色光和沿所述第二光路出射的第二基色光, 所述第 二基色区将所述第一光分为至少沿所述第一光路出射的第二基色光与 沿所述第二光路出射的第一基色光, 所述第三基色区将所述第二光分 为至少沿所述第一光路和第二光路出射的两路第三基色光。
如权利要求 4所述的投影***, 其特征在于, 所述第三基色区设置有 半反射半透射膜片或偏振片。
如权利要求 1所述的投影***, 其特征在于, 还包括一控制装置, 所 述控制装置用于控制所述发光装置、 分光装置与空间光调制器同步, 以使在所述空间光调制器中所述第一、 第二、 第三基色光与图像信号 同步。
如权利要求 1所述的投影***, 其特征在于, 所述光调制器为 DMD光 调制器, 从所述第一光路与第二光路出射的所述第一、 第二、 第三基 色光分别从不同的角度对应入射至所述 DMD光调制器的第一区域与 第二区域。
如权利要求 7所述的投影***, 其特征在于, 所述 DMD光调制器上设 置棱镜组, 从所述第一光路与第二光路出射的所述第一、 第二、 第三 基色光分别从所述棱镜组的第一面与第二面进入所述棱镜组, 并被所 述棱镜组分别引导至所述 DMD光调制器的第一区域与第二区域, 所 述第一面与第二面相对或者相邻设置。
如权利要求 7所述的投影***, 其特征在于, 所述 DMD光调制器的第 一区域与第二区域的微镜单元朝向一第一方向吋状态为幵、 而朝向一 第二方向吋状态为关, 其中, 所述图像处理装置还用于根据入射至所 述第一区域或第二区域的所述第一、 第二、 第三基色光的角度修正待 输出至该区域的图像信号的信号值, 及 /或, 所述图像处理装置还用
于将所述第一区域或第二区域的图像信号的信号值进行互补修正。 如权利要求 7所述的投影***, 其特征在于, 所述 DMD光调制器的第 一区域上的微镜单元旋转至一第一方向吋状态为幵、 旋转至一第二方 向吋状态为关, 第二区域上的微镜单元旋转至一第三方向吋状态为幵 、 旋转至一第四方向吋状态为关, 其中,所述第三方向不同于所述第 一方向, 所述第二方向不同于所述第四方向, 所述第二方向与所述第 三方向相同或不同, 所述第一方向与所述第四方向相同或不同。 如权利要求 10所述的投影***, 其特征在于, 所述 DMD光调制器的 第一区域上的微镜单元绕一维、 二维或三维进行转动, 以在所述第一 方向与所述第二方向之间转动, 及 /或, 所述 DMD光调制器的第二区 域上的微镜单元绕一维、 二维或三维进行转动, 以在所述第三方向与 所述第四方向之间转动。
如权利要求 1所述的投影***, 其特征在于, 所述分光***包括至少 一个反射镜, 所述反射镜用于将从所述分光装置出射的所述第一基色 光、 所述第二基色光及所述第三基色光反射进入所述第一光路及 /或 第二光路。
如权利要求 1所述的投影***, 其特征在于, 还包括设置于所述第一 光路与第二光路上的匀光装置, 所述匀光装置用于将经过的所述第一 、 第二、 第三基色光均匀化。
如权利要求 13所述的投影***, 其特征在于, 所述匀光装置为一微透 镜阵列, 所述微透镜阵列包括设置于第一光路上的第一部分微透镜阵 列与设置于第二光路上的第二部分微透镜阵列, 所述第一部分微透镜 阵列与第二部分微透镜阵列采用的微透镜将投射至所述空间光调制器 的第一区域与第二区域的所述第一、 第二、 第三基色光的光斑尺寸与 长宽比调制为相同。
如权利要求 1-14任一所述的投影***, 其特征在于, 所述第一光为黄 光、 第二光为蓝光, 所述分光装置吋序地将所述黄光分为沿第一光路 出射的红光与沿第二光路出射的绿光、 及沿第一光路出射的绿光与沿
第二光路出射的红光、 及将所述蓝光分为沿第一光路、 第二光路出射 的两路蓝光。
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US11402735B2 (en) | 2022-08-02 |
US20210011363A1 (en) | 2021-01-14 |
CN109426052A (zh) | 2019-03-05 |
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