WO2022017277A1 - Système d'éclairage de projecteur optique - Google Patents

Système d'éclairage de projecteur optique Download PDF

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Publication number
WO2022017277A1
WO2022017277A1 PCT/CN2021/106753 CN2021106753W WO2022017277A1 WO 2022017277 A1 WO2022017277 A1 WO 2022017277A1 CN 2021106753 W CN2021106753 W CN 2021106753W WO 2022017277 A1 WO2022017277 A1 WO 2022017277A1
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Prior art keywords
light
color
polarized light
polarized
spatial
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PCT/CN2021/106753
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English (en)
Chinese (zh)
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赵鹏
许擎栋
胡飞
李屹
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深圳光峰科技股份有限公司
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Publication of WO2022017277A1 publication Critical patent/WO2022017277A1/fr

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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
    • 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
    • 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
    • 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
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • 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
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • 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
    • G03B21/2073—Polarisers in the lamp house
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3161—Modulator illumination systems using laser light sources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3167—Modulator illumination systems for polarizing the light beam

Definitions

  • the present application relates to the field of projection technology, in particular to an opto-mechanical lighting system.
  • transmissive and reflective spatial light modulators such as LCD (Liquid Crystal Display, liquid crystal display), which rely on the photoelectric effect of liquid crystal molecules, through the external electric field to make the LCD. The refraction characteristics of the liquid crystal molecules on the panel are changed, thereby realizing the gray scale of the picture.
  • Reflective spatial light modulators mainly include DMD (Digital Micromirror Device, digital micromirror device) and LCOS (Liquid Crystal on Silicon, liquid crystal on silicon) two categories.
  • DMD can be described as a semiconductor switch, which consists of 500,000 to 1.3 million micromirrors gathered on a CMOS (Complementary Metal Oxide Semiconductor) silicon substrate, each micromirror represents a pixel, through the micromirror The flip timing to control the grayscale of the pixel.
  • the flipping of a normal micromirror is divided into crossover time and switch time, which represent the state transition time of the micromirror and the minimum interval between two consecutive state switches, respectively.
  • Figure 1 shows the flipping timing of the DMD lens in the related art. In a single DMD system, the timing interval shown in Figure 1 can achieve 8-bit grayscale for RGB three colors, and if it is a dual DMD system or a triple DMD system, Then more grayscales of the image can be achieved.
  • the uniform illumination incident on the spatial light modulator is modulated to form a picture, and the high brightness of the picture can be achieved by increasing the optical power incident on the spatial light modulator per unit time.
  • the thermal load caused by illumination restricts the further improvement of the optical power on the spatial light modulator.
  • DMD when uniform light hits the micromirror, on the one hand, the specular reflection will generate a part of the heat. A part of the energy will be reserved for the light irradiated on the projection chip, so that the light irradiated on the chip will exceed a part of the edge of the chip, and the ratio of the light energy exceeding the chip to the total energy of the light is called overfill in the art.
  • the utilization rate of the light source is the highest, but in practical applications, a certain overfill will be reserved. However, the larger the overfill, the lower the utilization rate of the light source used for imaging; the overfill is too small Then there will be a dark band problem), and this part of the light is almost completely converted into heat.
  • the related art ensures the heat dissipation capability of the DMD by improving the quality of the light spot incident on the spatial light modulator, reducing the overfill, or designing a structure conducive to heat dissipation, thereby reducing the heat load caused by illumination.
  • these methods have complex structures and high costs.
  • balancing the thermal load on each spatial light modulator is also a method to increase the optical power incident on the spatial light modulator per unit time.
  • 2 is a schematic structural diagram of a dual DMD projection system 100 in the related art.
  • the dual DMD projection system 100 generates blue excitation light through the first laser group 111, which is used to excite the wavelength conversion device 120 to generate yellow fluorescence.
  • the fluorescence is split by the spectroscopic device 130 to generate red light and green light, which are respectively distributed to the first DMD 141 and the second DMD 142.
  • the second laser group 112 provides blue laser light to fill in the first DMD 141 in time, which can be in a specific color gamut.
  • the thermal power consumption balance of the dual spatial light modulator is achieved under the requirements.
  • the optical power of different color lights in different color gamuts there are great differences in the optical power of different color lights in different color gamuts.
  • the wavelength range of green light is 490nm-580nm, and its luminous efficacy is 509lm/W
  • the wavelength of green light is 509lm/W. It is 525nm, and its luminous efficacy reaches 541.8lm/W.
  • the luminous efficacy of the three-color light is very different, and the optical power of the three-color light required to synthesize white light will also be different. Due to the broad spectrum characteristics of fluorescence, the corresponding color gamut of the dual DMD projection system 100 is narrower, and it is difficult to adapt to the requirements of different color gamuts. At the same time, the dual DMD projection system 100 cannot achieve dynamic adjustment when balancing optical power.
  • the purpose of the present application is to provide an opto-mechanical lighting system to solve the above problems.
  • the embodiments of the present application achieve the above objects through the following technical solutions.
  • An embodiment of the present application provides an opto-mechanical lighting system, including a light source module, a first spatial light modulator, a second spatial light modulator, a first light splitting and combining device, and a second light splitting and combining device; the light source module is used to emit light Three primary color lights, the three primary color lights include a first color light, a second color light and a third color light, the optical power of the third color light is greater than the optical power of the first color light, and is greater than the optical power of the second color light, the third color light includes the first color light.
  • the first light splitting and combining device is used for guiding the first polarized light to the first spatial light modulator for modulation, and for guiding the second polarized light to the second spatial light modulator for modulation modulation, the first light splitting and combining device is further used for guiding the first color light to the first spatial light modulator or the second spatial light modulator for modulation, and for guiding the second color light to the first spatial light modulator or The second spatial light modulator modulates; the second light splitting and combining device is used to combine the first color light, the second color light, the first polarized light and the third color light modulated by the first spatial light modulator and the second spatial light modulator The two polarized light is combined and emitted.
  • the light source module is further configured to adjust the ratio of the first polarized light and the second polarized light.
  • the light source module includes a first laser, a second laser, a third laser and a polarization converter, the first laser is used for emitting the first color light; the second laser is used for emitting the second color light; The three lasers are used to emit the third color light; the polarization converter is used to convert the polarization state of the third color light to obtain the first polarized light and the second polarized light, and to adjust the ratio between the first polarized light and the second polarized light .
  • the light source module includes a first laser, a second laser, a first polarized laser and a second polarized laser, the first laser is used for emitting the first color light; the second laser is used for emitting the second color light ; The first polarized light laser is used to emit the first polarized light; the second polarized light laser emits the second polarized light.
  • the light source module further includes a polarizing light reflecting mirror and a polarizing light combining device; the polarizing light reflecting mirror is used for guiding the first polarized light to the polarizing light combining device, or for guiding the second polarized light to the polarized light combining device A light combining device; the polarizing light combining device is used to combine the first polarized light and the second polarized light to form a third color light.
  • the first color light is red light
  • the second color light is blue light
  • the third color light is green light
  • the first polarized light is green P-polarized light
  • the second polarized light is green S-polarized light
  • the light splitting device is used for directing red and green S-polarized light to the first spatial light modulator for modulation, and for directing blue and green P-polarized light to the second spatial light modulator for modulation.
  • the opto-mechanical lighting system further includes a first dichroic filter and a second dichroic filter, and the first dichroic filter is disposed on the light splitting surface of the first light splitting device , the second dichroic filter is arranged on the light splitting surface of the second light splitting and light combining device.
  • the first color light is green light
  • the second color light is blue light
  • the third color light is red light
  • the first polarized light is red P-polarized light
  • the second second polarized light is red S-polarized light
  • a light splitting device is used for guiding green light, blue light and red S-polarized light to the first spatial light modulator for modulation, and for guiding red P-polarized light to the second spatial light modulator for modulation.
  • the optomechanical lighting system further includes a first polarizing bandpass filter and a second polarizing bandpass filter, and the first polarizing bandpass filter is disposed on the light splitting surface of the first light splitting and combining device , the second polarizing bandpass filter is arranged on the light splitting surface of the second light splitting and light combining device.
  • the opto-mechanical lighting system further includes a reflective lens, a homogenizing device and a relay lens group; the reflective lens is used to guide the light of the three primary colors emitted by the light source module to the homogenizing device, and the homogenizing device is used for reflecting The light of the three primary colors emitted by the lens is homogenized, and the relay lens group is used for relaying the light of the three primary colors emitted by the homogenizing device to the first light splitting and combining device.
  • the opto-mechanical lighting system uses three primary color lights emitted by the light source module as projection light, and divides the third color light with the highest optical power into first polarized light and second polarized light
  • the first light splitting and combining device can evenly distribute the first color light, the second color light, the first polarized light and the second polarized light to the two spatial light modulators for modulation, so as to realize the dual spatial light modulator in a wide color gamut.
  • Optical power balance while balancing the thermal load of the dual spatial light modulator, enables the dual spatial light modulator to work at full load under ideal conditions, increasing the light output of the projection and achieving high brightness of the picture.
  • FIG. 1 is a timing chart of the inversion of a DMD lens in the related art.
  • FIG. 2 is a schematic structural diagram of a dual DMD projection system in the related art.
  • FIG. 3 is a comparison diagram of pictures of different bit depths in the related art.
  • FIG. 4 is a color light timing diagram of a single DMD and a dual DMD in the related art.
  • FIG. 5 is a CIE 1931 color gamut diagram in the related art.
  • FIG. 6 is a coordinate diagram of visual effect function of color light of different wavelengths in the related art.
  • FIG. 7 is a schematic structural diagram of an opto-mechanical lighting system provided by an embodiment of the present application.
  • FIG. 8 is a graph showing the relationship between the power ratio of the sum of the blue-green laser power and the red laser power and the wavelength of the red laser in the related art.
  • FIG. 9 is a P-polarized light gating spectrum of the dichroic filter provided by the embodiment shown in FIG. 7 .
  • FIG. 10 is the S-polarized light gating spectrum of the dichroic filter provided by the embodiment shown in FIG. 7 .
  • FIG. 11 is a color light timing diagram of the single DMD and opto-mechanical lighting system provided by the embodiment shown in FIG. 7 .
  • FIG. 12 is a schematic structural diagram of an opto-mechanical lighting system provided by another implementation manner of the embodiment shown in FIG. 7 .
  • FIG. 13 is a schematic structural diagram of an opto-mechanical lighting system provided by another embodiment of the present application.
  • FIG. 14 is the color coordinates of the three primary colors specified in the Rec.2020 color gamut in the related art.
  • FIG. 15 is the spectrum of the polarizing bandpass filter provided by the embodiment shown in FIG. 13 .
  • FIG. 16 is a color light timing diagram of the single DMD and opto-mechanical lighting system provided by the embodiment shown in FIG. 13 .
  • FIG. 17 is a schematic structural diagram of an opto-mechanical lighting system provided by another implementation manner of the embodiment shown in FIG. 13 .
  • the optical power balance of the spatial light modulator while balancing the thermal load of the dual spatial light modulator, enables the spatial light modulator to work at full load under ideal conditions, enhances the projected light output, and achieves high brightness of the picture.
  • the dual spatial light modulator projection system provided by the embodiments of the present application can be applied to cinema projectors, educational projectors, laser TVs, micro projectors, engineering projectors, etc., which is not specifically limited in the present application.
  • bit depth which indicates the number of bits required for the grayscale information of a pixel in a grayscale image.
  • bit depth indicates the number of bits required for the grayscale information of a pixel in a grayscale image.
  • FIG. 3 shows a comparison diagram of pictures with different bit depths in the related art. It can be seen that the greater the bit depth, the more delicate and richer the image picture will be. Therefore, increasing the bit depth is a very important indicator in the display industry, and it is also the pursuit of high-end displays in the future.
  • the realization of different gray scales can be obtained by adjusting the duty cycle of the spatial light modulator in time. For example, for DMD, realizing white light in a certain color gamut requires the color light timing diagram of single DMD and double DMD shown in Figure 4. Referring to FIG. 4 , the idle intervals in the color light timing diagram are the spokes on the timing set to reduce the color breakup (also called "rainbow effect" or "color separation”) in some laser phosphor projection systems.
  • the spoke phenomenon means that when a fluorescent color wheel or color filter wheel with multiple color schemes is used, when the light is irradiated at the junction of the two colors, the color will appear impure (such as the red and blue junctions are illuminated at the same time, the At the same time, it emits red light and blue light, and emits magenta light).
  • the current solution is to not emit the picture during the time period there. In this way, when the whole image is sampled, a completely black picture will appear. It can be seen from Fig. 4 that at the same frame rate, the dual spatial light modulator system can provide more color time ratios after reasonable light splitting. Therefore, the dual spatial light modulator provided by this application is compared with the single spatial light modulation system.
  • the overall structure of the dual spatial light modulator projection system is simpler, the components used are less, and the cost is lower.
  • FIG. 5 is a CIE 1931 color gamut diagram in the related art, please refer to FIG. 5 , the color gamut of human eyes can refer to the CIE 1931 color gamut diagram.
  • the projection or display screen uses RGB three primary colors, and the corresponding color can be output by configuring the ratio between the RGB three primary colors.
  • the color gamut range included in the display or projection is also different.
  • the edge of the CIE 1931 color gamut diagram is composed of monochromatic light with wavelengths ranging from 380nm to 780nm. The closer to the center, the wider the spectral lines.
  • the common Rec.709 color gamut covers less than half of the overall color gamut
  • the Rec.2020 color gamut which uses monochromatic light as the RGB primary color, covers nearly 90% of the overall color gamut.
  • FIG. 6 is a coordinate diagram of the visual effect function of color light of different wavelengths in the related art. Please refer to FIG. 6 , the color light of different wavelength ranges has different luminous efficacy.
  • the The luminous flux of light is obtained by multiplying the visual effect value at the wavelength by its optical power. If the color light forms a certain spectral line, it is necessary to integrate the product of the optical power spectral line and the visual effect of the color light, as shown in the following formula (1) shown:
  • x and y are the known color coordinates
  • Y i is the ratio of lumens to be solved. According to formula (2) and formula (3), the lumens of RGB three primary colors can be obtained by solving proportion.
  • the required optical power is calculated according to a specific color gamut. Generally, due to the high visual efficiency of green light, the corresponding optical power is relatively large, and the green light needs to be split. In some color gamuts, the proportion of red light is high, and its optical power is the largest. The optimal way is to split the red light. In this case, if the technical solution of the dual spatial light modulator projection system 100 (see FIG. 2 for details) is adopted, it will inevitably cause uneven distribution of optical power on the dual spatial light modulators.
  • the opto-mechanical lighting system provided by the embodiments of the present application can dynamically adjust the light splitting strategy for different color gamuts, for example, splitting green light in some color gamuts, or splitting red light in some color gamuts, so that different color gamuts can be realized.
  • a multi-primary dual-DMD laser projection display device emits laser light through laser light source modules I and II, and the laser light source module I includes a red laser light source. referred to as R A, red laser light source is referred to as R B, referred to as a green laser light source G B; II laser light source includes a blue laser light source module referred to as B A, referred to as blue laser light B B, green laser light sources referred to for G A .
  • the multi-primary-color dual-DMD laser projection display device adopts multi-primary-color laser light source and dual-DMD structure, which improves the coverage of color gamut, but does not find the technical problem of unbalanced optical power output by dual spatial light modulators.
  • an imaging system based on dual DMD analyzes the current image received by the microprocessor to determine whether there is a saturated area in the current image.
  • the first DMD is dimming in the time domain
  • the microprocessor analyzes the current image obtained after the dimming in the time domain to determine whether there is still a saturated area in the current image
  • the microprocessor analyzes the current image obtained after the time domain dimming.
  • the second DMD is dimmed in the spatial domain.
  • the image quality is guaranteed and the dynamic range of the image is enlarged.
  • the core point of the imaging system is to realize the high dynamic range image of the dual spatial light modulator, and the technical problem of the optical power imbalance of the dual spatial light modulator has not been found, and its application scene is not within the scope of three-primary laser projection.
  • FIG. 7 is a schematic structural diagram of an opto-mechanical lighting system provided by an embodiment of the present application.
  • the opto-mechanical lighting system 200 includes a light source module 210 , a first spatial light modulator 221 , a second spatial light modulator 222 , The first light splitting and combining device 231 and the second light splitting and combining device 232 .
  • the light source module 210 may be a laser light source, and the light source module 210 is used to emit three primary colors of light, the three primary colors of light include a first color light, a second color light and a third color light, and the optical power of the third color light is greater than the optical power of the first color light, and greater than the optical power of the second color light.
  • the third color light includes first polarized light and second polarized light.
  • the light source module 210 can also be an LED (Light Emitting Diode, light emitting diode) light source, and the LED light source can also emit light of three primary colors.
  • the three primary color light refers to the basic light that can be used to synthesize other color light, which can be monochromatic light, such as red light, green light and blue light commonly used in the art.
  • the third color light is polarized light, and the polarized light can be represented by the vector sum of S-polarized light and P-polarized light, the first polarized light can be one of P-polarized light and S-polarized light, and the second polarized light can be Another kind of P-polarized light and S-polarized light.
  • the first spatial light modulator 221 and the second spatial light modulator 222 may be DMD, LCOS, LCD, or other devices that realize spatial light modulation.
  • the first light splitting and combining device 231 is used for guiding the first polarized light to the first spatial light modulator 221 for modulation, and for guiding the second polarized light to the second spatial light modulator 222 for modulation.
  • the first light splitting and combining device 231 is also used for guiding the first color light to the first spatial light modulator 221 or to the second spatial light modulator 222 for modulation, and for guiding the second color light to the first spatial light
  • the modulator 221 is either directed to a second spatial light modulator 222 for modulation.
  • the second light splitting and combining device 232 is configured to combine the first color light, the second color light, the first polarized light and the second polarized light modulated by the first spatial light modulator 221 and the second spatial light modulator 222 and then emit the light .
  • the ratio between the first polarized light and the second polarized light may be preset according to the optical power ratio between the first color light, the second color light and the third color light, since the first polarized light is guided to the second polarized light
  • a spatial light modulator 221 conducts modulation, the second polarized light is guided to the second spatial light modulator 222 for modulation, and the first color light and the second color light can be selectively guided to the first spatial light modulator 221 or the second spatial light modulator 221
  • the spatial light modulator 222 performs modulation such that the optical powers of the first spatial light modulator 221 and the second spatial light modulator 222 are balanced.
  • the first polarized light and the third color light can be preset.
  • the ratio between the two polarized lights is such that the sum of the optical powers of the first polarized light and the first color light is equal to or nearly equal to the sum of the optical powers of the second polarized light and the second color light.
  • the first color light is guided to the first spatial light modulator 221 for modulation, and the second polarized light and the second color light are guided to the second spatial light modulator 222 for modulation, so that the first spatial light modulator 221 and the second spatial light modulator 221 can be realized.
  • the optical power balance of the two spatial light modulators 222 is the optical power difference between the first color light, the second color light and the third color light.
  • the ratio between the first polarized light and the second polarized light can be set so that the first polarized light and the first color light
  • the sum of the optical power of the second color light and the second polarized light is equal to or nearly equal to the optical power of the second polarized light.
  • the light source module 210 is further configured to adjust the ratio between the first polarized light and the second polarized light.
  • adjusting the ratio between the first polarized light and the second polarized light refers to adjusting the duty ratio between the first polarized light and the second polarized light, so that the optomechanical lighting system 200 can be flexibly applied to a variety of different Color gamut, realizes the optical power balance of the first spatial light modulator 221 and the second spatial light modulator 222 under different color gamuts.
  • the optomechanical illumination system 200 uses three primary color lights as projection light, and since the color coordinate points of the monochromatic light are distributed on the boundary of the color gamut, a wide color gamut can be realized. It should be noted that a wide color gamut such as the Rec.2020 color gamut (see Figure 5 for details) is a color gamut standard with very strict requirements, and the corresponding three-primary color light has low luminous efficacy. Especially in the red light band, due to the low electro-optical efficiency of the red laser and the need for temperature control, some trade offs need to be made for practical engineering needs.
  • red light with a wavelength of 630nm that meets the Rec.2020 color gamut standard is not high, but is slightly shifted.
  • red light with a wavelength of 620nm has a luminous efficacy. More than 40% increase over 630nm red light.
  • the optical power of the three primary colors is often no longer dominated by red light (the optical power of red light is higher than the sum of the optical powers of blue light and green light).
  • Fig. 8 is a graph showing the relationship between the power ratio of the blue-green laser power and the red laser power and the wavelength of the red laser in the related art. Please refer to Fig. 7 and Fig. 8 together.
  • the sum of the optical power of blue-green light is greater than that of red light.
  • the red light with a wavelength of 610nm it can be seen from the CIE 1931 color gamut diagram that the reduction of its color gamut coverage is very limited. Therefore, a low-wavelength red light with higher optical efficiency can be selected. This choice also makes blue-green light.
  • the sum of the optical powers of the light is greater than the optical power of the red laser.
  • the opto-mechanical lighting system 200 can split green light to achieve optical power balance of the dual spatial light modulators, so that the technical solution of the present application is more universal.
  • the optical power of the green light is greater than that of the red light and greater than that of the blue light, and the green light can be reasonably split by the first light splitting and combining device 231 to meet the requirement of balancing the optical power.
  • the first color light is red light
  • the second color light is blue light
  • the third color light is green light
  • the first polarized light is green P-polarized light
  • the second polarized light is green S-polarized light, that is, green light
  • the light power is the highest
  • the green light is the polarization state light, including the green P-polarized light and the green S-polarized light with adjustable ratio.
  • the first light splitting and combining device 231 is used for guiding the red light and green S-polarized light to the first spatial light modulator 221 for modulation, and for guiding the blue and green P-polarized light to the second spatial light modulator 222 for modulation , the optical power balance of the dual spatial light modulator can be realized in the color gamut where green light is the color light with the highest optical power.
  • a dichroic filter can be used to split the green light.
  • the opto-mechanical lighting system 200 further includes a first dichroic filter 233 and a second dichroic filter 234.
  • the first dichroic filter 233 is disposed on the light splitting surface of the first light splitting and light combining device 231, and the second The dichroic filter 234 is disposed on the light splitting surface of the second light splitting and light combining device 232 .
  • the first dichroic filter 233 has a difference in wavelength gating for the green P-polarized light and the green S-polarized light, and according to this characteristic, the green wavelength matching the first dichroic filter 233 can be selected, so that the first dichroic filter 233 can reflect red and green S-polarized light to the first spatial light modulator 221 for modulation, and transmit blue and green P-polarized light to the second spatial light modulator 222 for modulation .
  • FIG. 9 and FIG. 10 are the gated spectra of P-polarized light and S-polarized light of the dichroic filter provided by the embodiment of the present application, respectively, the first dichroic filter 233 and the second dichroic filter 234 can use a dichroic filter with the gated spectrum shown in FIG. 9 and FIG. 10, the cutoff wavelength of the first dichroic filter 233 and the second dichroic filter 234 can be 550nm, and its There is a gap of about 5 nm in the gate threshold, which is suitable for adding green light with a wavelength of 550 nm.
  • the first dichroic filter 233 and the second dichroic filter 234 transmit the green P-polarized light.
  • the first dichroic filter 233 and the second dichroic filter 234 reflect the green S-polarized light. Meanwhile, the first dichroic filter 233 and the second dichroic filter 234 highly transmit light below the cutoff wavelength and highly reflect light above the cutoff wavelength. Therefore, the first dichroic filter 233 can transmit blue light to the second spatial light modulator 222 and reflect red light to the first spatial light modulator 221 .
  • the ratio between the first polarized light and the second polarized light, the first polarized light, the second polarized light, the first color light and the second color light can be evenly distributed to the first spatial light modulator 221 and the second spatial light
  • the light modulator 222 modulates.
  • the ratio between the first polarized light and the second polarized light can be adjusted by a polarized light converter.
  • the light source module 210 may be a laser light source, and the light source module 210 includes a first laser 2111 , a second laser 2112 , a third laser 2113 and a polarization converter 2114 .
  • the first laser 2111 is used to emit the first color light (eg red light)
  • the second laser 2112 is used to emit the second color light (eg blue light)
  • the third laser 2113 is used to emit the third color light (eg green light)
  • the converter 2114 is used to convert the polarization state of the third color light to obtain the first polarized light (eg, green P-polarized light) and the second polarized light (eg, green S-polarized light), and to adjust the first polarized light and the second polarized light The ratio between light.
  • the polarized light converter 2114 also known as a PCS (polarization conversion system), may be composed of a PBS (Polarized Beam Splitter, polarization beam splitter) array and a half-wave plate. Taking the third color light as green light as an example, the green light passes through the PBS array to obtain green S-polarized light and green P-polarized light. Polarized light, the ratio between green S-polarized light and green P-polarized light can be adjusted.
  • PCS polarization conversion system
  • first dichroic filter 233 and the second dichroic filter 234 are adapted to the wavelength of green light, and when the third color light is red light or blue light or green light with some other wavelengths , those skilled in the art can choose other specifications of dichroic filters, polarizing bandpass filters or other spectroscopic components that can meet the requirements, as long as the balanced distribution of the three primary colors can be achieved, and the dual spatial light modulator can be realized. optical power balance.
  • the duty ratio between the green P-polarized light and the green S-polarized light can be controlled to be 0.74:0.26, so as to pass
  • the first spatial light modulator 221 distributes red light and green light with an optical power ratio of 0.26 (ie, green S-polarized light)
  • the second spatial light modulator 222 distributes blue light and green light with an optical power ratio of 0.74 (ie, green P-polarized light).
  • Polarized light under this color gamut (the power of green light is greater than that of red light, and the power of green light is greater than that of blue light), the optical power balance of the dual spatial light modulator can be achieved.
  • the light source module 210 may further include three collimating lenses 2115 , and the three collimating lenses 2115 are respectively disposed at the outputs of the first laser 2111 , the second laser 2112 and the third laser 2113 .
  • the emission light path is used to collimate the first color light, the second color light and the third color light and emit. loss.
  • the opto-mechanical lighting system 200 further includes a reflective lens 251 , a homogenizing device 252 and a relay lens group 253 .
  • the reflective lens 251 is used to guide the light of the three primary colors emitted by the light source module 210 to the uniform light device 252, the uniform light device 252 is used to uniformize the light of the three primary colors emitted by the reflective lens 251, and the relay lens group 253 is used to uniformize the light.
  • the three primary color lights emitted by the device 252 are relayed to the first light splitting and combining device 231 .
  • the reflective lens 251 is used to change the optical paths of the three primary colors of light, so that the three primary colors of light can all be incident on the light homogenizing device 252 for homogenization.
  • the reflective lens 251 may include a first reflective sub-lens 2511 and a second reflective sub-lens 2512 .
  • the first reflective sub-lens 2511 is used to reflect blue light to the light-diffusing device 252 and transmit red light to the light-diffusing device 252 .
  • the second reflective sub-lens 2512 is used for reflecting green light to the homogenizing device 252 , and transmitting red light and blue light to the homogenizing device 252 , so as to ensure that the three primary colors of light can be incident on the homogenizing device 252 .
  • the embodiments of the present application do not limit the number and types of optical elements included in the reflective lens 251 for changing the optical path.
  • the optical path conversion components all belong to the protection scope of the present application.
  • the homogenizing device 252 can homogenize the light of the three primary colors, so as to avoid the problems of burns caused by excessive local impact and uneven brightness of the output image.
  • the homogenizing device 252 can be any one of a light rod, a fly-eye lens, and a light cone.
  • the relay lens group 253 is used to collect and condense the three primary color lights emitted by the homogenizing device 252 and then provide it to the first light splitting and combining device 231.
  • the relay lens group 253 can be formed by a combination of a plurality of collecting lenses, such as a convex lens and a concave lens. .
  • the optomechanical illumination system 200 further includes a first total internal reflection prism 261 and a second total internal reflection prism 262 .
  • the first total internal reflection prism 261 is used to reflect the light beam emitted by the first light splitting and combining device 231 to the first spatial light modulator 221 for modulation, and then output to the second light splitting and combining device 232 .
  • the second total internal reflection prism 262 is used to reflect the light beam emitted by the first light splitting and combining device 231 to the second spatial light modulator 222 for modulation, and then output to the second light splitting and combining device 232 .
  • the first total internal reflection prism 261 and the second total internal reflection prism 262 can be formed by combining two triangular prisms respectively, and the light incident on the first total internal reflection prism 261 and the second total internal reflection prism 262 is totally reflected, thereby By allowing more light to enter the first spatial light modulator 221 and the second spatial light modulator 222 , the light collection capability of the optomechanical lighting system 200 can be improved.
  • the opto-mechanical lighting system 200 further includes a lens 263, and the lens 263 is used for receiving the combined light emitted by the second light splitting and combining device 232, so as to finally form an image.
  • FIG. 12 is a schematic structural diagram of an opto-mechanical lighting system provided by another implementation manner of the embodiment of the present application. Please refer to FIG. 12.
  • the ratio between the first polarized light and the second polarized light is It can be adjusted by laser modules with different polarization states.
  • the light source module 210 may be a laser light source, and the light source module 210 includes a first laser 2121 , a second laser 2122 , a first polarized laser 2123 and a second polarized laser 2124 .
  • the first laser 2121 is used to emit the first color light (eg red light)
  • the second laser 2122 is used to emit the second color light (eg blue light)
  • the first polarized light laser 2123 is used to emit the first polarized light (eg green P polarization) light)
  • the second polarized light laser 2124 is used to emit the second polarized light (eg green S-polarized light)
  • the first polarized light laser 2123 and the second polarized light laser 2124 can be adjusted by controlling the on-off duty cycle The ratio between polarized light and second polarized light.
  • the light source module 210 further includes a polarized light reflecting mirror 2125 and a polarized light combining device 2126 .
  • the polarizing mirror 2125 is used to guide the first polarized light to the polarized light combining device 2126 or to guide the second polarized light to the polarizing light combining device 2126 .
  • the polarized light combining device 2126 is used to combine the first polarized light and the second polarized light to form a third color light.
  • the polarized light combining device 2126 is arranged on the optical path of the first polarized light laser 2123, the polarized light reflector 2125 is arranged on the optical path of the second polarized light laser 2124, and the polarized light reflector 2125 is used to combine the second polarized light The light is directed to the polarized light combining device 2126.
  • the polarized light reflector 2125 is used to change the optical path of the first polarized light or the second polarized light, so that the first polarized light and the second polarized light can be incident on the polarized light combining device 2126 for light combining.
  • the polarized light reflecting mirror 2125 can be a flat reflecting mirror or a curved emitting mirror, which can be specifically set according to actual needs.
  • the polarized light combining device 2126 is provided with a third dichroic filter 2128, and the third dichroic filter 2128 can be selected from a dichroic filter consistent with the first dichroic filter 233, so that the third The third color light formed by combining the first polarized light and the second polarized light by the dichroic filter 2128 can be split by the first dichroic filter 233 to form the first polarized light and the second polarized light.
  • first polarized light emitted by the first polarized light laser 2123 and the second polarized light emitted by the second polarized light laser 2124 can be directly incident on the homogenizing device 252 for light combining, or can be combined by the polarized light combining device 2126 After the light is combined, the light is incident on the homogenizing device 252, and the specific form is not limited.
  • the light source module 210 further includes four collimating lenses 2127, and the four collimating lenses 2127 are respectively disposed on the first laser 2121, the second laser 2122, the first polarized laser 2123 and the second polarized laser 2124 On the outgoing light path, the first color light, the second color light, the first polarized light and the second polarized light are collimated and emitted to form a collimated light beam.
  • the opto-mechanical lighting system 200 provided in this embodiment of the present application can set the difference between the green P-polarized light and the green S-polarized light by using the polarization converter 2114 or the first polarized light laser 2123 and the second polarized light laser 2124 of different polarization states. ratio, and set a dichroic filter in the first light splitting and combining device 231 to reflect the red light and green S-polarized light to the first spatial light modulator 221 for modulation, and transmit the blue and green P-polarized light to the second space.
  • the light modulator 222 performs modulation, and can realize the optical power balance of the dual spatial light modulators in a color gamut where the optical power of green light is greater than that of red light and blue light.
  • FIG. 13 is a schematic structural diagram of an opto-mechanical lighting system provided by another embodiment of the present application. Please refer to FIG. 13 .
  • the opto-mechanical lighting system 300 provided by this embodiment can also be used when the optical power of red light is greater than that of green light and blue light.
  • Color gamut of optical power for example, Rec.2020 color gamut
  • the first color light is green light
  • the second color light is blue light
  • the third color light is red light
  • the first polarized light is red P-polarized light
  • the second polarized light is red S-polarized light. That is, red light has the highest optical power
  • red light is polarized light, including red P-polarized light and red S-polarized light with adjustable ratio.
  • the Rec.2020 color gamut is just needed.
  • the color coordinates of the RGB three primary colors used in the Rec.2020 color gamut are shown in Figure 14.
  • the three primary colors of the Rec.2020 color gamut are monochromatic light.
  • it is considered to use a laser light source as the three primary color light source, so that the optomechanical lighting system 200 can realize the Rec.2020 color gamut standard.
  • the opto-mechanical lighting system 300 converts the red light into a polarization state, and sets the ratio between the red P-polarized light and the red S-polarized light, and then the green light, blue light, and red S-polarized light can be converted by the first light splitting device 331.
  • the light is reflected to the first spatial light modulator 321 for modulation, and the red P-polarized light is transmitted to the second spatial light modulator 322 for modulation, so that the optical power balance of the dual spatial light modulators can be achieved under the Rec.2020 color gamut.
  • the opto-mechanical lighting system 300 further includes a first polarizing bandpass filter 333 and a second polarizing bandpass filter 334, and the first polarizing bandpass filter 333 is disposed on the first light splitting and combining device
  • the light splitting surface of 331 , the second polarizing bandpass filter 334 is arranged on the light splitting surface of the second light splitting and light combining device 332 .
  • the first polarization bandpass filter 333 and the second polarization bandpass filter 334 have different wavelength band specifications.
  • the first polarization bandpass filter 333 and the second polarization bandpass filter 334 can be Use the polarizing bandpass filter shown in Figure 15.
  • the center wavelength of the first polarization bandpass filter 333 and the second polarization bandpass filter 334 can be 639 nm, and the red P-polarized light can pass through the first polarization bandpass
  • the filter 333 and the second polarizing bandpass filter 334 are incident on the second spatial light modulator 322 for modulation, while the red S-polarized light, green light and blue light are reflected to the second spatial light modulator 322 for modulation, through
  • the opto-mechanical lighting system 300 can also use a dichroic filter or other light-splitting components that can meet the requirements to split the red light.
  • the ratio between the red P-polarized light and the red S-polarized light can be adjusted by a polarization converter, and the red light with the highest optical power can be converted into the required polarization state light by the polarization converter, Then, according to the gate control of the polarization converter, the duty ratio between the red P-polarized light and the red S-polarized light can be adjusted.
  • the laser light source 310 includes a first laser 3111 , a second laser 3112 , a third laser 3113 and a polarization converter 3114 .
  • the first laser 3111 is used to emit the first color light (eg green light)
  • the second laser 3112 is used to emit the second color light (eg blue light)
  • the third laser 3113 is used to emit the third color light (eg red light)
  • polarized light The converter 3114 is used to convert the polarization state of the third color light to obtain the first polarized light (such as red P-polarized light) and the second polarized light (such as red S-polarized light), and is used to adjust the first polarized light and the second polarized light ratio between.
  • the laser light source 310 further includes three collimating lenses 3115.
  • the three collimating lenses 3115 are respectively arranged on the outgoing optical paths of the first laser 3111, the second laser 3112 and the third laser 3113, and are used to combine the first color light, the second laser The color light and the third color light are collimated and emitted to form a collimated beam.
  • the duty ratio of the red P-polarized light and the red S-polarized light can be adjusted to 0.956:0.044, so that the The first spatial light modulator 321 distributes blue light, green light, and red light with an optical power ratio of 0.044 (ie, red S-polarized light), and the second spatial light modulator 322 distributes red light with an optical power ratio of 0.956 ( That is, red P-polarized light), which can realize the optical power balance of the dual spatial light modulator in the Rec.2020 color gamut.
  • FIG. 17 is a schematic structural diagram of an opto-mechanical lighting system provided by another embodiment of the present application. Please refer to FIG. 17.
  • red P-polarized light and red S-polarized light The ratio can be adjusted by laser modules with different polarization states.
  • the laser light source 310 includes a first laser 3121 , a second laser 3122 , a first polarized laser 3123 and a second polarized laser 3124 .
  • the first laser 3121 is used to emit the first color light (eg green light)
  • the second laser 3122 is used to emit the second color light (eg blue light)
  • the first polarized light laser 3123 is used to emit the first polarized light (eg red P polarization) light)
  • the second polarized light laser 3124 is used to emit the second polarized light (eg, red S-polarized light).
  • the ratio between the first polarized light and the second polarized light can be adjusted by controlling the on-off duty ratio of the first polarized light laser 3123 and the second polarized light laser 3124 .
  • the laser light source 310 further includes a polarized light reflecting mirror 3125 and a polarized light combining device 3126 .
  • the polarizing mirror 3125 is used to guide the first polarized light to the polarized light combining device 3126 or to guide the second polarized light to the polarizing light combining device 3126 .
  • the polarized light combining device 3126 is used to combine the first polarized light and the second polarized light to form a third color light.
  • the polarized light combining device 3126 is arranged on the optical path of the first polarized light laser 3123, and the polarized light reflector 3125 is arranged on the optical path of the second polarized light laser 3124, and the polarized light reflector 3125 is used to combine the second polarized light laser 3124.
  • the light is directed to polarized light combining device 3126.
  • the polarized light combining device 3126 is provided with a third polarizing bandpass filter 3129, and the third polarizing bandpass filter 3129 can be selected from a polarizing bandpass filter consistent with the first polarizing bandpass filter 333, so that the third The third color light formed by combining the polarizing bandpass filter 3129 can be split by the first polarizing bandpass filter 333 to form the first polarized light and the second polarized light.
  • the laser light source 310 For other contents of the laser light source 310, reference may be made to the relevant records in the other embodiments above, and details are not described herein again.
  • the ratio between the red P-polarized light and the red S-polarized light can be preset by the polarization converter 3114 or the first polarization laser 3123 and the second polarization laser 3124 , and a polarization bandpass filter is set in the first light splitting and combining device 331 to transmit the red P-polarized light to the second spatial light modulator 321 for modulation, and reflect the red S-polarized light, green light and blue light to the second spatial light modulator 321.
  • the spatial light modulator 322 performs modulation, which can realize the optical power balance of the dual spatial light modulators in the Rec.2020 color gamut.
  • the optical-mechanical lighting system improved in the embodiment of the present application can dynamically adjust the light splitting scheme for different color gamuts.
  • the green light has the highest optical power
  • the green light can be split to achieve the optical power Balance
  • the red light has the highest optical power
  • the red light can be split to achieve optical power balance
  • the optical power of blue light is the highest, and the blue light can be split to achieve optical power balance.
  • the specific spectroscopic strategy can refer to the content of the above embodiment, and will not be repeated here.
  • Embodiments of the present application further provide a projector, which includes a housing (not shown) and an optomechanical lighting system, wherein the optomechanical lighting system is arranged in the housing.
  • the projector includes the opto-mechanical lighting system in the above-mentioned embodiments, it has all the beneficial effects of the opto-mechanical lighting system, which will not be repeated here.
  • the structural features of other parts of the projector are within the understanding of those skilled in the art, and will not be repeated here.

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

Abstract

L'invention concerne un système d'éclairage de projecteur optique (200, 300), comprenant une source de lumière laser (210, 310), un premier modulateur spatial de lumière (221, 321), un second modulateur spatial de lumière (222, 322), un premier dispositif de division/de combinaison de lumière (231, 331) et un second dispositif de division/de combinaison de lumière (232, 332). La source de lumière laser (210, 310) est utilisée pour émettre une lumière des trois couleurs primaires, la lumière des trois couleurs primaires comprend une lumière d'une première couleur, une lumière d'une deuxième couleur et une lumière d'une troisième couleur, la puissance optique de la lumière de la troisième couleur est supérieure à celle de la lumière de la première couleur et supérieure à celle de la lumière de la deuxième couleur, et la lumière de la troisième couleur comprend une première lumière polarisée et une seconde lumière polarisée. Le premier dispositif de division/de combinaison de lumière (231, 331) est utilisé pour guider la première lumière polarisée vers le premier modulateur spatial de lumière (221, 321) pour qu'elle soit modulée, pour guider la seconde lumière polarisée vers le second modulateur spatial de lumière (222, 322) pour qu'elle soit modulée, et il est également utilisé pour guider la lumière de la première couleur et la lumière de la deuxième couleur vers le premier modulateur spatial de lumière (221, 321) ou le second modulateur spatial de lumière (222, 322) pour qu'elles soient modulées ; le second dispositif de division/de combinaison de lumière (232, 332) est utilisé pour combiner un faisceau lumineux modulé et pour l'émettre. Selon le système d'éclairage de projecteur optique (200, 300), l'équilibre de la puissance optique dans une large gamme de couleurs est obtenu, la charge de chaleur est équilibrée et la quantité de lumière émise par la projection est améliorée.
PCT/CN2021/106753 2020-07-24 2021-07-16 Système d'éclairage de projecteur optique WO2022017277A1 (fr)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003322854A (ja) * 2002-05-08 2003-11-14 Victor Co Of Japan Ltd 液晶プロジェクタ装置
CN1462895A (zh) * 2003-06-24 2003-12-24 清华大学 反射式液晶立体投影光机
US20060028620A1 (en) * 2004-08-09 2006-02-09 3M Innovative Properties Company Projection display system using multiple light sources and polarizing element for using with same
CN101373275A (zh) * 2007-08-21 2009-02-25 鸿富锦精密工业（深圳）有限公司 立体投影光学系统
CN202093307U (zh) * 2011-06-22 2011-12-28 贺银波 一种用于反射式液晶投影显示的光引擎系统
US20130170030A1 (en) * 2011-12-29 2013-07-04 Delta Electronics, Inc. Stereoscopic display apparatus

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003322854A (ja) * 2002-05-08 2003-11-14 Victor Co Of Japan Ltd 液晶プロジェクタ装置
CN1462895A (zh) * 2003-06-24 2003-12-24 清华大学 反射式液晶立体投影光机
US20060028620A1 (en) * 2004-08-09 2006-02-09 3M Innovative Properties Company Projection display system using multiple light sources and polarizing element for using with same
CN101373275A (zh) * 2007-08-21 2009-02-25 鸿富锦精密工业（深圳）有限公司 立体投影光学系统
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US20130170030A1 (en) * 2011-12-29 2013-07-04 Delta Electronics, Inc. Stereoscopic display apparatus

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