WO2022017275A1 - Système de source de lumière et système de projection - Google Patents

Système de source de lumière et système de projection Download PDF

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Publication number
WO2022017275A1
WO2022017275A1 PCT/CN2021/106743 CN2021106743W WO2022017275A1 WO 2022017275 A1 WO2022017275 A1 WO 2022017275A1 CN 2021106743 W CN2021106743 W CN 2021106743W WO 2022017275 A1 WO2022017275 A1 WO 2022017275A1
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WO
WIPO (PCT)
Prior art keywords
light
light source
lens
fly
light beam
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Application number
PCT/CN2021/106743
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English (en)
Chinese (zh)
Inventor
陈晨
余新
胡飞
李屹
Original Assignee
深圳光峰科技股份有限公司
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Publication of WO2022017275A1 publication Critical patent/WO2022017275A1/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
    • G03B21/2013—Plural light sources
    • 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
    • G02B3/00—Simple or compound lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • 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
    • G03B21/2006—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
    • G03B21/208—Homogenising, shaping of the illumination light
    • 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]

Definitions

  • the present application relates to the field of optical technology, and in particular, to a light source system and a projection system.
  • the light source of laser plus fluorescence has been widely used.
  • some light sources need to consider the yellow fluorescence (or red fluorescence + green fluorescence) of red, green and blue laser and blue laser.
  • the light source also needs to consider uniform light when combining light.
  • square rods or fly-eye lenses are often used for uniform light solutions.
  • the inventors of the present application found that in the current light source system, when the laser and fluorescence light is homogenized using a fly-eye lens, the laser angle distribution of the homogenized spot will be discretized, which affects the light source.
  • the main technical problem to be solved by the present application is to provide a light source system and a projection system, by sacrificing the telecentricity characteristic to weaken the discreteness of the angular distribution of the homogenized light spot, so as to improve the uniformity of the brightness and color of the light source system and the safety of the light source .
  • a technical solution adopted in the present application is to provide a light source system
  • the light source system includes: a first light source for emitting a first light beam; a second light source for emitting a second light beam, the first light source The etendue of the light beam is greater than that of the second light beam; the light combining component is used for combining the first light beam and the second light beam; the fly-eye lens group includes a first fly-eye lens and a second fly-eye lens, which is used for combining the light beams The first light beam and the second light beam are homogenized; the collecting lens is located on the side of the fly-eye lens away from the light combining component, and is used for focusing the first and second light beams after the homogenization, wherein the second fly-eye lens is located in the first light beam and the second light beam.
  • a fly-eye lens and the collecting lens are arranged between and offset from the focal point of the collecting lens.
  • the front focal plane of the collecting lens is located upstream of the optical path of the second fly-eye lens.
  • the first fly-eye lens includes a first micro-lens unit arranged in an array; the second fly-eye lens includes a second micro-lens unit arranged in an array; the first micro-lens unit is in one-to-one correspondence with the second micro-lens unit, and the The structures of the first microlens unit and the second microlens unit are the same.
  • the broadening angle ⁇ of the light emitted by the single second microlens unit after passing through the collecting lens satisfies the following formula:
  • a is the side length of the longer side of the second micro-lens unit
  • f BFL is the equivalent back focal length of the collecting lens
  • the collecting lens is a single lens.
  • the collecting lens is a combination of at least two lenses.
  • the light source system also includes a first relay lens, the first relay lens is located between the light combining component and the fly-eye lens group, and is used for collecting the combined first and second light beams to the first fly-eye lens.
  • the first preset area is located between the light combining component and the fly-eye lens group, and is used for collecting the combined first and second light beams to the first fly-eye lens.
  • the first light source is a fluorescent light source
  • the second light source is a laser light source
  • the laser light source includes at least one green laser emitting green excitation light, at least one red laser emitting red excitation light, and at least one emitting blue excitation light. blue laser.
  • the light source system further includes a second relay lens, and the relay lens group is located between the second light source and the light combining component, and is used for collecting the second light beam emitted by the second light source to the second preset area of the light combining component. .
  • a projection system which includes the light source system of any of the above-mentioned embodiments and a spatial light modulator located on the light exit light path of the light source system.
  • the device is used to modulate the light beam emitted by the light source system into image light carrying image information.
  • the light source system of the present application includes a first light source for emitting a first light beam, a second light source for emitting a second light beam, a light combining component, a fly-eye lens group and a collection lens, the etendue of the first beam is greater than that of the second beam, the light combining component is used to combine the first beam and the second beam to obtain the combined light after the first beam and the second beam are combined, and the fly-eye lens group It is used to homogenize the combined light after the first beam and the second beam are combined, and the collecting lens is used to focus the first beam and the second beam after the homogenization, wherein the second fly-eye lens deviates from the focus of the collecting lens In this way, the first light beam and the second light beam after homogenizing through the fly-eye lens group can still have a certain diffusion angle after passing through the collecting lens, so that the energy of the first light beam and the second light beam after homogenizing The distribution is relatively consistent; that is
  • FIG. 1 is a schematic structural diagram of an embodiment of a light source system provided by the present application.
  • FIG. 2 is a schematic diagram of the optical path structure of an embodiment of the fly-eye lens group and the collecting lens in FIG. 1;
  • FIG. 3 is a schematic view of the optical path structure in the fly-eye lens group in FIG. 1;
  • FIG. 4 is a schematic structural diagram of a double-telecentric design fly-eye lens and a collecting lens in the related art
  • FIG. 5 is a schematic diagram of the distribution of an embodiment of the fly-eye lens group and the collecting lens in FIG. 1;
  • FIG. 6 is a schematic structural diagram of an embodiment of a projection system provided by the present application.
  • FIG. 1 is a schematic structural diagram of an embodiment of a light source system provided by the present application.
  • the light source system in this embodiment includes at least two light sources, which are a first light source 1 and a second light source 2, respectively.
  • the first light source 1 uses For emitting the first light beam
  • the second light source 2 is used for emitting a second light beam, wherein the etendue of the first light beam is larger than that of the second light beam.
  • the first light source 1 refers to a light source with a large etendue of the outgoing light beam, for example, the first light source 1 may be a fluorescent light source, and the first light beam may be a fluorescent light beam; the second light source 2 refers to the optical expansion of the outgoing light beam
  • the light source with a smaller quantity for example, the second light source 2 may be a laser light source, and the second light beam may be a laser light beam.
  • the first light source 1 may include an excitation light source (not shown) and a fluorescent color wheel (not shown).
  • the excitation light emitted by the excitation light source such as blue laser
  • the excitation light emitted by the excitation light source is incident on the fluorescent color wheel, and the fluorescent color
  • the wheel generates corresponding fluorescence under the irradiation of excitation light, for example, the first light beam can be yellow fluorescence, or the first light beam can also be red fluorescence and green fluorescence.
  • the second light source 2 may include a red laser 201 emitting red excitation light, a green laser 202 emitting green excitation light, and a blue laser 203 emitting blue excitation light.
  • the light source system further includes a light combining component 3 , a fly-eye lens group 4 and a collecting lens 5 .
  • the light combining component 3 is used to combine the first light beam and the second light beam with different etendues, so as to obtain a combined light after the first light beam and the second light beam are combined.
  • a reflection film 31 can be arranged on the light combining component 3 by using the idea that the etendue of the second light beam is smaller than that of the first light beam, so as to combine the first light beam and the second light beam.
  • the second light beam can be incident on the reflective film 31 of the light combining component 3 through beam control, and then exit after being reflected; while the etendue of the first light beam It is relatively large, and the first light beam is incident on the peripheral transmission area of the light combining component 3 through beam control, and then exits after being transmitted.
  • the first light beam incident on the reflective film 31 of the light combining component 3 is reflected, which will reduce the efficiency of the first light beam. Therefore, the area of the reflective film can be designed to be as small as possible.
  • the fly-eye lens group 4 includes a first fly-eye lens 41 and a second fly-eye lens 42, which are used to uniformize and shape the combined first beam and the second beam, and the shaping can form a predetermined spot shape, such as Rectangle, square, etc.
  • the first fly-eye lens 41 is located between the light combining component 3 and the second fly-eye lens 42 , that is, the combined light after the combining of the first beam and the second beam passes through the first fly-eye lens 41 and the second fly-eye lens 42 in turn for Homogenization and shaping.
  • the fly-eye lens group 4 may be a single-piece double-fly-eye lens or a double-piece single-fly-eye lens.
  • the single-piece double-fly-eye lens refers to that a plurality of microlenses are provided on opposite surfaces of the single-piece lens.
  • the two opposite faces may be the first fly-eye lens 41 and the second fly-eye lens 42 in this embodiment, respectively.
  • the fly-eye lens group 4 can also be a double-piece single fly-eye lens, that is, the first fly-eye lens 41 and the second fly-eye lens 42 are arranged in a mirror image.
  • the first fly-eye lens 41 includes first micro-lens units 411 arranged in an array;
  • the second fly-eye lens 42 includes a second micro-lens unit 421 arranged in an array.
  • the first micro-lens unit 411 and the second micro-lens unit 421 are one
  • the first micro-lens unit 411 and the second micro-lens unit 421 corresponding to one another and disposed correspondingly may be convex lenses with exactly the same shape.
  • the distance between the first fly-eye lens 41 and the second fly-eye lens 42 is equal to the focal length of the first microlens unit 411 or the second microlens unit 421 .
  • the first microlens unit 411 can be imaged on the second microlens unit 421, so as to achieve a uniform output of the light beam.
  • the collecting lens 5 is located on the side of the fly-eye lens group 4 away from the light combining component 3, and is used for focusing the first beam and the second beam after homogenization.
  • FIG. 2 is a schematic diagram of the optical path structure of an embodiment of the fly-eye lens group 4 in FIG. 1.
  • the light beam emitted by the first micro-lens unit 411 propagates parallel to the optical axis after passing through the corresponding second micro-lens unit 421, After passing through the collecting lens 5 , it converges on the back focal plane BFP of the collecting lens 5 .
  • the collection lens is a double lens group 5 through the beam after 1, from the principal plane of the second lens group PP2 double exit first principal plane PP of the dual focus lens group to the back focal plane BFP two lens groups.
  • the etendue of the first light beam is relatively large, so the spot area of the first light beam in the light combining component 3 is relatively large, in contrast, the etendue of the second light beam is relatively small.
  • the first light beam after passing through the first fly-eye lens 41 , the first light beam can have a larger expanded light spot on the second fly-eye lens 42 , and the light energy density distribution is relatively uniform; while the second light beam is on the second fly-eye lens 42 The light spot is small and the light energy density distribution is not uniform.
  • the second fly-eye lens 42 is located between the first fly-eye lens 41 and the collecting lens 5 and is deviated from the focal point of the collecting lens 5 . That is, adjusting the front focal plane FFP of the collecting lens 5 to the optical path upstream of the second fly-eye lens 42 or adjusting the front focal plane FFP of the collecting lens 5 to the optical path downstream of the second fly-eye lens 42, so that the second fly-eye lens
  • the distance between 42 and the collecting lens 5 is smaller or greater than the focal length of the collecting lens 5 .
  • the second light beam after the uniform light of the fly-eye lens group 4 can still have a certain diffusion angle after passing through the collecting lens 5, so that the energy distributions of the first light beam and the second light beam after the uniform light are relatively consistent, so that the energy distribution of the uniform light beam is relatively consistent.
  • the distance between the collecting lens 5 and the second fly-eye lens 42 is equal to the focal length of the collecting lens 5 , that is, the front focal plane FFP of the collecting lens 5 and the second fly-eye lens 42 are spatially coincident with each other, then the parallel The light beam incident on the first microlens unit 411 on the optical axis converges on the front focal plane FFP of the collecting lens 5 after the second fly-eye lens 42 , and irradiates on the back focal plane BFP of the collecting lens 5 in a parallel manner.
  • the angular distribution of the light beam incident on the first fly-eye lens 41 is mapped to the angular distribution of the back focal plane BFP, and the angular distribution corresponding to the back focal plane BFP of the collecting lens 5 presents a certain separation, and it can be seen that the homogenized light spot 8
  • the angular distribution is at discrete points and discretization occurs. Specifically, the energy of the second beam in a certain angle range is too concentrated, while the energy distribution at other angles is less, resulting in a ratio of the first beam and the second beam at a certain angle is more than the ideal value, and other At some angles, the ratio of the first light beam and the second light beam is less than the ideal value, so that problems of brightness uniformity and color uniformity occur. This affects the brightness uniformity, color uniformity, and safety of the light source system.
  • the chief ray incident on the back focal plane BFP of the collecting lens 5 is no longer parallel to the optical axis It has a certain diffusion angle, so that the discreteness of the angular distribution of the homogenized light spot 8 can be better solved.
  • the front focal plane FFP of the collecting lens 5 is adjusted to the upstream direction of the optical path of the second fly-eye lens 42, so that the distance between the second fly-eye lens 42 and the collecting lens 5 is smaller than the focal length of the collecting lens 5, so that the The split light spot on the second fly-eye lens 42 is within one focal length of the collecting lens 5 , and then passes through the collecting lens 5 for imaging, which can better homogenize the angular distribution of the light beam on the back focal plane BFP of the collecting lens 5 .
  • the broadening angle ⁇ of the light beam emitted by the single second micro-lens unit 421 after passing through the collecting lens 5 is related to the equivalent front focal length of the collecting lens 5 and the front focal plane FFP of the collecting lens 5 and the first
  • the function of the distance d 1 of the two fly-eye lens arrays, preferably, ⁇ satisfies the following formula:
  • a is the side length of the longer side of the second micro-lens unit 421
  • f BFL is the equivalent back focal length of the collecting lens 5 .
  • the collecting lens 5 can be a single lens, and when the collecting lens 5 is a single lens, the structure of the entire light source system can be simpler, the design is convenient, and the cost is saved.
  • the collecting lens 5 may also be a combination of at least two lenses.
  • the collecting lens 5 can also be equivalent to a single lens.
  • the collecting lens 5 can be a simple double-thin lens group, the first principal plane PP1 of the collecting lens 5 is coincident with the first lens, and the second principal plane PP2 of the collecting lens 5 is coincident with the second lens where the focal length of the first lens is f1, the focal length of the second lens is f2, and the distance between the first principal plane PP1 and the second principal plane PP2 is d, then the equivalent focal length of the collecting lens 5
  • the formula for calculating fEFL is:
  • the calculation formula of the equivalent back focal length f BFL of the collecting lens 5 is:
  • the equivalent front focal length fFEL of the collecting lens 5 is:
  • the distance between the collecting lens 5 and the second fly-eye lens 42 is relatively short, and the volume of the entire light source system can be reduced.
  • setting the second fly-eye lens 42 at a position deviating from the focal point of the collecting lens 5 can make the second light beam homogenized by the fly-eye lens group 4 still have a certain diffusion angle after passing through the collecting lens 5, so that the The energy distributions of the first beam and the second beam after homogenization are relatively consistent; the present application sacrifices the characteristics of the high beam to a certain extent to weaken the discreteness of the angular distribution of the homogenized spot of the second beam, which is beneficial to improve the brightness and brightness of the light source system.
  • the uniformity of color and the improvement of the safety threshold of the light source system make the light source system more applicable.
  • the light source system further includes a first relay lens 6, and the first relay lens 6 is located between the light combining component 3 and the fly-eye lens group 4, and is used to make the combined first light beam. and the second light beam are concentrated to the first preset area of the first fly-eye lens 41 .
  • the first relay lens 6 straightens the first light beam and the second light beam and then enters the fly-eye lens group 4 . Both the first light beam and the second light beam combined by the light combining component 3 are focused by the first relay lens 6 and then emitted, so as to improve the utilization rate of the light beam by the subsequent optical path system.
  • the optical axes of the two beams are approximately coincident, and the divergence angles of the combined two beams also become smaller, so that This is beneficial to the subsequent uniform light treatment of the fly-eye lens group 4 .
  • the light source system may further include a second relay lens 7 , which is located between the second light source 2 and the light combining component 3 and is used to transmit the light emitted by the second light source 2 .
  • the second light beam is collected to the second predetermined area of the light combining component 3 .
  • the second light beam can be incident on the reflective film 31 of the light combining component 3 through the beam control of the second relay lens 7 .
  • the light source system of this embodiment can effectively improve the problem of discretization of the angular distribution after combining the first light beam and the second light beam due to different etendues. It is beneficial to improve the uniformity of brightness and color of the light source system, improve the safety threshold of the light source system, and enhance the applicability of the light source system.
  • the present application further provides a projection system, which includes the light source system 61 of any of the above embodiments and a spatial light modulator 62 located on the light exit path of the light source system 61 .
  • the spatial light modulator 62 is used to modulate the light beam emitted by the light source system 61 into image light carrying image information.
  • Spatial light modulator 62 may be a single-chip or multi-chip spatial light modulator.
  • the spatial light modulator 62 may be a reflective display element, for example, the spatial light modulator 62 may be a DMD (Digital Micro mirror Device, digital micro mirror device). In other alternative embodiments, the spatial light modulator 62 may also be LCOS (Liquid Crystal On Silicon, liquid crystal display on silicon), LCD (Liquid Crystal Display, liquid crystal display), and the like.
  • LCOS Liquid Crystal On Silicon, liquid crystal display on silicon
  • LCD Liquid Crystal Display, liquid crystal display
  • the second fly-eye lens of the light source system 61 is deviated from the focal point of the collecting lens, and the telecentricity characteristic is sacrificed to improve the combined effect of the first beam and the second beam due to the difference in etendue.
  • the problem of discretization of the light beam homogenization spot angle distribution can improve the brightness and color uniformity of the light source system 61, thereby improving the effect of the projection system.

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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

La présente invention concerne un système optique et un système de projection. Le système de source de lumière comprend une première source de lumière, une seconde source de lumière, un ensemble de combinaison de lumière, un ensemble de lentilles oculaires composites et une lentille de collecte, la première source de lumière étant conçue pour émettre un premier faisceau de lumière ; la seconde source de lumière étant conçue pour émettre un second faisceau de lumière, et l'extension optique du premier faisceau de lumière étant plus grande que celle du second faisceau de lumière ; l'ensemble de combinaison de lumière étant conçu pour combiner le premier faisceau de lumière et le second faisceau de lumière ; l'ensemble de lentilles oculaires composites comprend une première lentille oculaire composite et une seconde lentille oculaire composite, et il est conçu pour homogénéiser le premier faisceau de lumière et le second faisceau de lumière combinés ; et la lentille de collecte est située sur un côté des lentilles oculaires composites qui sont éloignées de l'ensemble de combinaison de lumière, et elle est conçue pour focaliser le premier faisceau de lumière et le second faisceau de lumière qui sont homogénéisés, la seconde lentille oculaire composite étant située entre la première lentille oculaire composite et la lentille de collecte et étant agencée de façon à dévier du point focal de la lentille de collecte. La présente invention améliore l'uniformité de la couleur et de la luminosité ainsi que la sécurité du système de source de lumière grâce à l'agencement de la seconde lentille oculaire composite de façon à ce qu'elle dévie du point focal de la lentille de collecte.
PCT/CN2021/106743 2020-07-22 2021-07-16 Système de source de lumière et système de projection WO2022017275A1 (fr)

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CN202010713519.XA CN113970871A (zh) 2020-07-22 2020-07-22 一种光源***及投影***

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CN115469503A (zh) * 2022-11-14 2022-12-13 深圳市橙子数字科技有限公司 一种激光以及led光源组合的投影***

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CN117389106B (zh) * 2023-12-08 2024-04-02 宜宾市极米光电有限公司 一种投影光源

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