CN119225106A - Laser projection light source and laser projection device - Google Patents
Laser projection light source and laser projection device Download PDFInfo
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- CN119225106A CN119225106A CN202411404713.4A CN202411404713A CN119225106A CN 119225106 A CN119225106 A CN 119225106A CN 202411404713 A CN202411404713 A CN 202411404713A CN 119225106 A CN119225106 A CN 119225106A
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- 230000010287 polarization Effects 0.000 claims abstract description 38
- 239000003086 colorant Substances 0.000 claims abstract description 21
- 239000011324 bead Substances 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000005286 illumination Methods 0.000 claims description 5
- 238000009792 diffusion process Methods 0.000 claims 1
- 230000003287 optical effect Effects 0.000 description 21
- 238000010586 diagram Methods 0.000 description 7
- 230000003631 expected effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
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- 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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/1006—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
- G02B27/10—Beam splitting or combining systems
- G02B27/14—Beam splitting or combining systems operating by reflection only
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/14—Beam splitting or combining systems operating by reflection only
- G02B27/141—Beam splitting or combining systems operating by reflection only using dichroic mirrors
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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
-
- 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
- G03B21/145—Housing details, e.g. position adjustments thereof
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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
-
- 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
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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
- G03B21/2073—Polarisers in the lamp house
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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
- G03B21/208—Homogenising, shaping of the illumination light
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Projection Apparatus (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
本发明公开一种激光投影光源和激光投影设备，其中激光投影光源包括：壳体，壳体包括相对的第一侧壁和第二侧壁，以及与第一侧壁和第二侧壁均垂直的第三侧壁，第一侧壁与第二侧壁上分别设有一个容置开口，分别用于容置一个激光器，第三侧壁上设有一个出光口；对应每个激光器设置有一个合光镜片组，激光器包括多个出光区，合光镜片组包括与多个出光区对应的多个反射镜，分别用于将多个出光区出射的光束均朝向出光口射出；多个出光区用于出射多种颜色且偏振方向不同的光，在多个出光区中的至少一个出光区与对应的一个反射镜之间设置有第一波片。
The present invention discloses a laser projection light source and a laser projection device, wherein the laser projection light source comprises: a shell, the shell comprises a first side wall and a second side wall opposite to each other, and a third side wall perpendicular to the first side wall and the second side wall, the first side wall and the second side wall are respectively provided with a receiving opening, respectively used to receive a laser, and the third side wall is provided with a light outlet; a light combining lens group is provided corresponding to each laser, the laser comprises a plurality of light outlet areas, the light combining lens group comprises a plurality of reflecting mirrors corresponding to the plurality of light outlet areas, respectively used to direct the light beams emitted from the plurality of light outlet areas toward the light outlet; the plurality of light outlet areas are used to emit light of a plurality of colors and with different polarization directions, and a first wave plate is provided between at least one of the plurality of light outlet areas and a corresponding reflecting mirror.
Description
The application is based on China patent application 201911025064.6 (2019-10-25), and the name of the application is a divisional application of a laser projection light source and laser projection equipment
Technical Field
The present invention relates to the field of laser projection devices, and in particular, to a laser projection light source and a laser projection device.
Background
The laser projection light source is an important component of laser projection equipment such as a laser television, a laser projector and the like and is used for providing illumination light beams. In order to improve the brightness of the light beam emitted by the laser projection light source, a plurality of lasers can be arranged in the laser projection light source, and the brightness of the light beam emitted by the laser projection light source can be improved by multiple times by combining the light beams emitted by the lasers into one beam. However, since the laser is usually a monochromatic laser (such as a blue laser, a red laser or a green laser), and the beam emitted by the laser projection light source is a white light beam, multiple fluorescent wheels are required to be arranged in the laser projection light source to be in one-to-one correspondence with the multiple lasers, each fluorescent wheel generates another two colors of laser under the excitation effect of the monochromatic laser emitted by the corresponding laser of the fluorescent wheel, the other two colors of laser and the monochromatic laser emitted by the laser can be mixed to form white light, multiple groups of lenses are required to be arranged in the laser projection light source to be in one-to-one correspondence with the multiple fluorescent wheels for changing the transmission paths of the laser of the other two colors, so that the laser of the other two colors and the monochromatic laser emitted by the laser are mixed to form white light, and multiple beams of white light are synthesized after the laser is mixed to form white light, so as to improve the brightness of the beam emitted by the laser projection light source. Therefore, the laser projection light source comprises more parts, and the structural complexity and the volume of the laser projection light source are increased.
Disclosure of Invention
The invention provides a laser projection light source and laser projection equipment, which are used for solving the problems of reducing the volume and the structural complexity of the laser projection light source while improving the brightness of a light beam emitted by the laser projection light source.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The embodiment of the invention provides a laser projection light source, which comprises a shell, two lasers and a light path component, wherein the shell comprises a first side wall, a second side wall and a third side wall which is perpendicular to the first side wall and the second side wall, the first side wall and the second side wall are respectively provided with an accommodating opening, the third side wall is provided with a light outlet, the two lasers are respectively arranged at the accommodating openings on the first side wall and the second side wall, each laser emits light towards the inside of the shell, the light emitting surface of each laser comprises a plurality of light emitting areas, the light emitting areas are used for emitting light with a plurality of colors, the light path component is arranged in the shell and is used for respectively combining the light with the colors emitted by the two lasers, and the two combined light beams are emitted towards the light emitting openings.
In some embodiments, the light emitting surface of each laser includes a first light emitting region, a second light emitting region and a third light emitting region, wherein the first light emitting region is used for emitting a first color light beam, the second light emitting region is used for emitting a second color light beam, the third light emitting region is used for emitting a third color light beam, and the first color light beam, the second color light beam and the third color light beam are combined to form a white light beam.
In some embodiments, the optical path assembly includes two light combining lens groups and a reflecting member, the two light combining lens groups are respectively used for combining light beams of multiple colors emitted by the two lasers, the two light combining lens groups emit light beams towards the reflecting member, and the reflecting member is used for changing transmission paths of the light beams emitted by the two light combining lens groups so that the light beams emitted by the two light combining lens groups are emitted from the light outlet.
In some embodiments, the first light-emitting region, the second light-emitting region, and the third light-emitting region of each laser are sequentially arranged along a direction approaching the reflector; each light combining lens group comprises a first reflecting lens, a second reflecting lens and a third reflecting lens, wherein the first reflecting lens is positioned at the light emitting side of a first light emitting area of a laser corresponding to the light combining lens group, the first reflecting lens reflects a first color light beam emitted from the first light emitting area, the second reflecting lens is positioned at the second light emitting area of the laser corresponding to the light combining lens group and the light emitting side of the first reflecting lens, the second reflecting lens reflects a second color light beam emitted from the second light emitting area and transmits the first color light beam reflected by the first reflecting lens, the third reflecting lens is positioned at the light emitting side of a third light emitting area of the laser corresponding to the light combining lens group, the first reflecting lens reflects a third color light beam emitted from the third light emitting area and transmits the first color light beam reflected by the first reflecting lens and the second color light beam reflected by the second reflecting lens, and the third color light beam reflected by the second reflecting lens is collinear.
In some embodiments, a distance between the first reflecting mirror and the first light emitting region on the central axis of the first light emitting region is a first distance, a distance between the second reflecting mirror and the second light emitting region on the central axis of the second light emitting region is a second distance, a distance between the third reflecting mirror and the third light emitting region on the central axis of the third light emitting region is a third distance, and the first distance, the second distance and the third distance are all 1-6 mm.
In some embodiments, the first color light beam emitted from the first light emitting region is one of a blue light beam and a green light beam, the second color light beam emitted from the second light emitting region is the other of the blue light beam and the green light beam, and the third color light beam emitted from the third light emitting region is a red light beam.
In some embodiments, the polarization direction of the first color light beam emitted by the first light emitting region is the same as the polarization direction of the second color light beam emitted by the second light emitting region, the polarization direction of the second color light beam emitted by the second light emitting region is perpendicular to the polarization direction of the third color light beam emitted by the third light emitting region, and a first wave plate is arranged between the third light emitting region and the third reflection lens and is used for rotating the polarization direction of the third color light beam emitted by the third light emitting region by 90 degrees+/-10 degrees.
In other embodiments, the polarization direction of the first color light beam emitted from the first light emitting region is the same as the polarization direction of the second color light beam emitted from the second light emitting region, the polarization direction of the second color light beam emitted from the second light emitting region is perpendicular to the polarization direction of the third color light beam emitted from the third light emitting region, a second wave plate is arranged between the first light emitting region and the first reflecting mirror, a third wave plate is arranged between the second light emitting region and the second reflecting mirror, the second wave plate is used for rotating the polarization direction of the first color light beam emitted from the first light emitting region by 90 degrees+/-10 degrees, and the third wave plate is used for rotating the polarization direction of the second color light beam emitted from the second light emitting region by 90+/-10 degrees.
In some embodiments, the second wave plate is integrally formed with the third wave plate.
In some embodiments, a spherical lens is mounted within the light exit, the spherical lens being capable of converging the light beam entering the light exit.
In some embodiments, the light incident side of the light outlet is provided with a light homogenizing member.
According to the laser projection light source provided by the invention, the light paths assembly is used for respectively combining the light beams with the multiple colors emitted by the two lasers, and the two combined light beams are emitted towards the light emitting opening, so that superposition of multiple light beams is realized, and the laser projection light source has higher brightness. Meanwhile, the light emergent surface of the laser in the laser projection light source comprises a plurality of light emergent areas which are used for emergent light with various colors, so that a plurality of lenses are not required to be arranged in the laser projection light source provided by the invention, and the size and the structural complexity of the laser projection light source can be reduced.
In a second aspect, an embodiment of the present invention provides a laser projection device, including a laser projection light source, an optical engine, and a projection lens that are sequentially connected, where the laser projection light source is a laser projection light source according to any one of the above-mentioned technical solutions, and the optical engine is configured to modulate an illumination beam emitted by the laser projection light source to generate an image beam, and project the image beam to the projection lens, where the projection lens is configured to image the image beam.
The laser projection device provided by the invention comprises the laser projection light source according to any one of the technical schemes, so that the laser projection device provided by the invention and the laser projection light source according to the technical schemes can solve the same technical problems and achieve the same expected effect.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a perspective view of a laser projection light source according to an embodiment of the present invention;
FIG. 2 is a second perspective view of a laser projection light source according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of one of the first optical path components of a laser projection light source according to an embodiment of the present invention;
FIG. 4 is a second optical path diagram of a first optical path component in a laser projection light source according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a laser in a laser projection light source according to an embodiment of the present invention;
Fig. 6 is a schematic structural diagram of a laser, a light combining lens set and a first wave plate in a laser projection light source according to an embodiment of the present invention;
Fig. 7 is a schematic structural diagram of a laser, a light combining lens set, a second wave plate and a third wave plate in a laser projection light source according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a second type of optical path component in a laser projection light source according to an embodiment of the present invention;
Fig. 9 is a schematic structural diagram of a laser projection apparatus according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, directly connected, indirectly connected via an intermediate medium, or in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The laser projection light source is an important component of the laser projection device and is used to provide an illumination beam.
In a first aspect, the embodiment of the invention provides a laser projection light source 1, which comprises a housing 11, two lasers 12 and an optical path component 13, wherein, as shown in fig. 1 and 2, the housing 11 comprises a first side wall 200 and a second side wall 300 which are opposite, and a third side wall 400 which is perpendicular to the first side wall 200 and the second side wall 300, one accommodating opening 111 is respectively arranged on the first side wall 200 and the second side wall 300, one light outlet 112 is arranged on the third side wall 400, two lasers 12 are respectively arranged at the accommodating openings 111 on the first side wall 200 and the second side wall 300, each laser 12 emits light towards the housing 11, as shown in fig. 5, the light emitting surface of each laser 12 comprises a plurality of light emitting areas for emitting light with a plurality of colors, as shown in fig. 3 or 8, the optical path component 13 is arranged in the housing 11, and the optical path component 13 is used for respectively combining the light with the plurality of colors of the two lasers 12, and emitting the two combined light beams towards the two light outlet 112.
According to the laser projection light source provided by the invention, the light paths component 13 respectively combine the light beams with the multiple colors emitted by the two lasers 12, and the two combined light beams are emitted towards the light outlet 112, so that superposition of multiple light beams is realized, and the laser projection light source has higher brightness. Meanwhile, as shown in fig. 5, since the light emitting surfaces of the lasers in the laser projection light source 1 all comprise a plurality of light emitting areas, the light emitting areas are used for emitting light with a plurality of colors, a plurality of lenses are not required to be arranged in the laser projection light source 1 provided by the invention, and therefore, the volume and the structural complexity of the laser projection light source 1 can be reduced.
The light emitting surface of the laser 12 may include two light emitting regions, three light emitting regions, or four light emitting regions, and the like, which are not particularly limited herein. Optionally, the light-emitting surface of the laser 12 includes the same number of light-emitting areas as the number of colors emitted from the light-emitting surface of the laser 12, and each light-emitting area is used for emitting light of one color.
In some embodiments, as shown in fig. 5, the light emitting surface of each laser 12 includes a first light emitting region 121, a second light emitting region 122, and a third light emitting region 123, where the first light emitting region 121 is configured to emit a first color light beam, the second light emitting region 122 is configured to emit a second color light beam, the third light emitting region 123 is configured to emit a third color light beam, and the first color light beam, the second color light beam, and the third color light beam are combined to form a white light beam. This simple structure need not to set up the fluorescent wheel in the laser projection light source 1, consequently can further reduce the volume of laser projection light source 1.
In the above-described embodiments, the colors of the first color light beam, the second color light beam, and the third color light beam are not particularly limited as long as the first color light beam, the second color light beam, and the third color light beam can be mixed to form white light. As shown in fig. 5, the first color light beam emitted from the first light emitting region 121 is a blue light beam, the second color light beam emitted from the second light emitting region 122 is a green light beam, and the third color light beam emitted from the third light emitting region 123 is a red light beam. As another example, the first color light beam emitted from the first light emitting region 121 is a cyan light beam, the second color light beam emitted from the second light emitting region 122 is a yellow light beam, and the third color light beam emitted from the third light emitting region 123 is a magenta light beam.
The first light-emitting region 121, the second light-emitting region 122, and the third light-emitting region 123 may correspond to one bead in the laser 12, may correspond to a row of beads in the laser 12, and may also correspond to multiple rows of beads in the laser 12, which is not limited herein. In some embodiments, as shown in fig. 5, the third light-emitting region 123 corresponds to two rows of beads in the laser 12, and the first light-emitting region 121 and the second light-emitting region 122 each correspond to one row of beads in the laser 12. Each row of beads comprises 6 beads.
In some embodiments, a spherical lens 14 is mounted within the light exit, the spherical lens 14 being capable of converging the light beam entering the light exit. In this way, the optical elements (such as the light guide 100 in fig. 1 and 2) in the subsequent light engine of the laser projection light source 1 can be designed smaller in size, which is advantageous for reducing the size of the laser projection device.
The light path component 13 has various structural forms, and by way of example, the light path component 13 can have the following two embodiments:
In the first embodiment, as shown in fig. 3 and 4, the optical path assembly 13 includes two light combining lens groups 131 and a reflecting member 132, the two light combining lens groups 131 are respectively used for combining the light beams of the multiple colors emitted by the two lasers 12, and the two light combining lens groups 131 emit the light beams toward the reflecting member 132, and the reflecting member 132 is used for changing the transmission paths of the emitted light beams of the two light combining lens groups 131 so that the emitted light beams of the two light combining lens groups 131 are emitted from the light outlet 112. Thus, the light path component 13 has the advantages of simple structure, lower cost, smaller volume of the laser projection light source, lower structural complexity and easy realization.
In some embodiments, as shown in FIG. 5, the first light-emitting region 121, the second light-emitting region 122, and the third light-emitting region 123 of each laser 12 are sequentially arranged along a direction (i.e., the direction X in FIGS. 3 and 4) approaching the reflector 132, as shown in FIGS. 3 and 4, each light-combining lens group 131 includes a first lens 1311, a second lens 1312, and a third lens 1313, the first lens 1311 is located on the light-emitting side of the first light-emitting region 121 of the corresponding laser 12 of the light-combining lens group 131, the first lens 1311 reflects the first color light beam emitted from the first light-emitting region 121, the second lens 1312 is located on the light-emitting side of the second light-emitting region 122 of the corresponding laser 12 and the first lens 1311, the second lens 1312 reflects the second color light beam emitted from the second light-emitting region 122 and transmits the first color light beam reflected by the first lens 1311 after the first lens 1313 is located on the light-reflecting side of the corresponding lens group 12, and the third lens 1312 reflects the third color light beam reflected from the third lens 1312 after the third light-reflecting light beam from the third lens 1311 and the third lens 1311 is transmitted by the third lens 1311. Thus, the light combining lens group 131 can combine the light beams of multiple colors emitted by the laser 12, and the structure is simple, the occupied space is small, and the size of the laser projection light source 1 is reduced.
In the above-described embodiment, it should be understood that ensuring that the optical axis of the first color light beam reflected by the first mirror 1311, the optical axis of the second color light beam reflected by the second mirror 1312, and the optical axis of the third color light beam reflected by the third mirror 1313 are absolutely collinear is difficult to achieve during actual processing and installation of the laser projection light source 1, and therefore, it should be understood that the optical axes of the first color light beam reflected by the first mirror 1311, the second color light beam reflected by the second mirror 1312, and the third color light beam reflected by the third mirror 1313 described in the embodiments of the present application are not to be interpreted as being absolutely collinear, but rather as being "collinear or approximately collinear". By way of example, the optical axes of the first color light beam reflected by the first reflecting mirror 1311, the second color light beam reflected by the second reflecting mirror 1312, and the third color light beam reflected by the third reflecting mirror 1313 described in the embodiment of the present application are collinear, which means that, among the optical axes of the first color light beam reflected by the first reflecting mirror 1311, the second color light beam reflected by the second reflecting mirror 1312, and the third color light beam reflected by the third reflecting mirror 1313, the interval between any two optical axes is smaller than a first specific value, the angle between any two optical axes is smaller than a second specific value, which may be 1mm, 2mm, or 3mm, etc., without being specifically limited thereto, and the second specific value may be 1 °,2 °, or 3 °, etc., without being specifically limited thereto.
The first reflecting mirror 1311 may be a total reflecting mirror, a dichroic plate, or other structures, which are not particularly limited herein. As illustrated in fig. 3 and 4, the first mirror 1311 is a total reflection mirror.
The second reflection mirror 1312 and the third reflection mirror 1313 may be dichroic plates, or may have other structures, and are not particularly limited herein. In some embodiments, as shown in fig. 3 and 4, the second mirror plate 1312 and the third mirror plate 1313 are dichroic plates.
In some embodiments, as shown in fig. 6, a distance between the first reflecting mirror 1311 and the first light emitting region 121 on the central axis l 1 of the first light emitting region 121 is a first distance h 1, a distance between the second reflecting mirror 1312 and the second light emitting region 122 on the central axis l 2 of the second light emitting region 122 is a second distance h 2, a distance between the third reflecting mirror 1313 and the third light emitting region 123 on the central axis l 3 of the third light emitting region 123 is a third distance h 3, and the first distance h 1, the second distance h 2, and the third distance h 3 are all 1-6 mm. In this way, the distance between the light combining lens group 131 and the laser 12 is moderate, so that the size of the laser projection light source 1 in the direction perpendicular to the light emitting surface of the laser 12 can be reduced, and collision damage of the light combining lens group 131 and the laser 12 during installation due to the fact that the distance between the light combining lens group 131 and the laser 12 is relatively close can be avoided.
In the above embodiment, as shown in fig. 6, the central axis l 1 of the first light-emitting region 121 is an axis perpendicular to the light-emitting surface of the laser 12 and passing through the center of the first light-emitting region 121, the central axis l 2 of the second light-emitting region 122 is an axis perpendicular to the light-emitting surface of the laser 12 and passing through the center of the second light-emitting region 122, and the central axis l 3 of the third light-emitting region 123 is an axis perpendicular to the light-emitting surface of the laser 12 and passing through the center of the third light-emitting region 123.
The light emitted from the light emitting surface of the laser 12 is emitted by a light emitting device (i.e., a lamp bead) inside the laser 12, and compared with the light emitting device emitting laser light of other colors, the divergence angle of the light beam emitted by the light emitting device emitting red light is larger, so as to avoid the light spot of the light beam emitted by the laser 12 being larger when the light beam is reflected by the light combining lens group 131 and the reflecting member 132 and transmitted to the light emitting port 112, in some embodiments, as shown in fig. 5, the first color light beam emitted from the first light emitting region 121 is one of a blue light beam and a green light beam, the second color light beam emitted from the second light emitting region 122 is the other of the blue light beam and the green light beam, and the third color light beam emitted from the third light emitting region 123 is a red light beam. In this way, compared with the first color light beam emitted from the first light emitting region 121 and the second color light beam emitted from the second light emitting region 122, the transmission path of the third color light beam (i.e., the red light beam) emitted from the third light emitting region 123 between the light emitting surface of the laser 12 and the light emitting opening 112 is shorter, and the light spot formed at the light emitting opening 112 is smaller, so that the light spot of the light beam emitted from the laser 12 after being reflected by the light combining lens group 131 and the reflecting member 132 and transmitted to the light emitting opening 112 is avoided from being too large, which is beneficial to reducing the diameter of the spherical lens installed in the light emitting opening 112.
In some embodiments, as shown in fig. 5, the polarization direction of the first color light beam emitted from the first light emitting region 121 is the same as the polarization direction of the second color light beam emitted from the second light emitting region 122, and the polarization direction of the second color light beam emitted from the second light emitting region 122 is perpendicular to the polarization direction of the third color light beam emitted from the third light emitting region 123.
In the above embodiment, in order to increase the light output uniformity of the laser projection light source 1, the following two alternative implementations may be adopted:
In a first alternative implementation, as shown in fig. 6, a first wave plate 134 is disposed between the third light-emitting region 123 and the third reflection lens 1313, where the first wave plate 134 is configured to rotate the polarization direction of the third color light beam emitted from the third light-emitting region 123 by 90+±10°. In this way, the polarization direction of the light beam emitted from the third light emitting region 123 is changed by the first wave plate 134, so that the polarization direction of the light beam emitted from the third light emitting region 123 is consistent with the polarization direction of the light beam emitted from the first light emitting region 121 or the second light emitting region 122, and the light emitting uniformity of the laser projection light source 1 can be increased.
In a second alternative implementation manner, as shown in fig. 7, a second wave plate is disposed between the first light-emitting region 121 and the first reflecting mirror 1311, a third wave plate is disposed between the second light-emitting region 122 and the second reflecting mirror 1312, the second wave plate is used for rotating the polarization direction of the second color light beam emitted from the first light-emitting region 121 by 90 ° ± 10 °, and the third wave plate is used for rotating the polarization direction of the third color light beam emitted from the second light-emitting region 122 by 90 ° ± 10 °. In this way, the polarization directions of the light beams emitted from the first light emitting region 121 and the second light emitting region 122 are changed by the second wave plate and the third wave plate, so that the polarization directions of the light beams emitted from the first light emitting region 121 and the second light emitting region 122 are consistent with the polarization directions of the light beams emitted from the third light emitting region 123, and the light emitting uniformity of the laser projection light source 1 can be increased.
In the above embodiment, optionally, as shown in fig. 7, the second wave plate is integrally formed with the third wave plate to form the structure 135. Thus, the laser projection light source 1 includes a smaller number of parts, and has lower structural complexity and assembly difficulty.
In order to improve uniformity of the outgoing light beams of the plurality of light-converging lens groups 131 when combining one light beam, in some embodiments, as shown in fig. 4, a light-homogenizing member 133 is disposed on the light-incident side of the light-exiting port 112. The light equalizing member 133 can improve uniformity of the output light beams of the plurality of light converging lens groups 131 when combining one light beam.
In some embodiments, light homogenizing member 133 is a diffuser or a fisheye lens.
In the second embodiment, as shown in fig. 8, the optical path assembly 13 includes two light combining lens groups 131, the two light combining lens groups 131 are respectively used for combining the light beams of the multiple colors emitted by the two lasers 12, and the two light combining lens groups 131 both emit the light beams toward the light outlet 112. Thus, the light path component 13 has the advantages of simple structure, lower cost, smaller volume of the laser projection light source, lower structural complexity and easy realization.
In a second aspect, some embodiments of the present invention provide a laser projection device, as shown in fig. 9, including a laser projection light source 1, a light engine 2, and a projection lens 3 sequentially connected, where the laser projection light source 1 is the laser projection light source 1 according to any one of the first aspect, the light engine 2 is configured to modulate an illumination beam emitted by the laser projection light source 1 to generate an image beam, and project the image beam to the projection lens 3, and the projection lens 3 is configured to image the image beam.
The laser projection device provided by the invention comprises the laser projection light source 1 according to any one of the embodiments of the first aspect, so that the laser projection device provided by the invention and the laser projection light source 1 according to the embodiments of the invention can solve the same technical problems and achieve the same expected effects.
In some embodiments, the laser projection device further includes a projection screen, the projection screen is disposed on the light-emitting path of the projection lens 3, and the projection beam imaged by the projection lens 3 forms a projection screen on the projection screen.
In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (12)
1. A laser projection light source, comprising:
the light emitting device comprises a shell, a first light emitting device and a second light emitting device, wherein the shell comprises a first side wall, a second side wall and a third side wall, the first side wall and the second side wall are opposite to each other, the third side wall is perpendicular to the first side wall and the second side wall, the first side wall and the second side wall are respectively provided with an accommodating opening, and the third side wall is provided with a light emitting port;
The two lasers are respectively arranged at the accommodating openings on the first side wall and the second side wall;
the light emitting surface of the laser comprises a first light emitting area, a second light emitting area and a third light emitting area which are respectively used for emitting a first color light beam, a second color light beam and a third color light beam;
The two light converging lens groups are arranged in the shell and are respectively used for converging the light with multiple colors emitted by the two lasers;
the light converging lens group comprises a plurality of reflecting mirrors which are respectively arranged corresponding to a plurality of light emergent areas and are respectively used for emitting light beams emitted by the light emergent areas towards the light emergent opening;
And a first wave plate is arranged between at least one light emergent region of the plurality of light emergent regions and the corresponding reflecting mirror.
2. The laser projection light source of claim 1, wherein,
The first color light beam emitted by the first light emitting area is one of a blue light beam and a green light beam, the second color light beam emitted by the second light emitting area is the other of the blue light beam and the green light beam, and the third color light beam emitted by the third light emitting area is a red light beam;
The light combining lens group comprises a first reflecting lens, a second reflecting lens and a third reflecting lens which are respectively positioned at the light emitting sides of the first light emitting area, the second light emitting area and the third light emitting area.
3. The laser projection light source of claim 2, wherein the third mirror is a dichroic plate and is positioned on the light exit side of the first mirror and the second mirror.
4. The laser projection light source of claim 2, wherein,
The polarization direction of the first color light beam emitted by the first light emitting area of at least one laser is the same as the polarization direction of the second color light beam emitted by the second light emitting area of the laser, and the polarization direction of the second color light beam emitted by the second light emitting area is perpendicular to the polarization direction of the third color light beam emitted by the third light emitting area;
The first wave plate is arranged between the third light emergent region and the third reflecting mirror, and the first wave plate is used for changing the polarization direction of the light beam emergent from the third light emergent region, so that the polarization direction of the light beam emergent from the third light emergent region is consistent with the polarization direction of the light beam emergent from the first light emergent region or the second light emergent region.
5. The laser projection light source of claim 1 or 2, wherein each of the light exit regions of at least one of the lasers corresponds to at least one bead, or at least to a row of beads.
6. The laser projection light source according to claim 2, wherein the angles between the reflecting surfaces of the first, second and third reflecting mirrors and the light emitting surface of the laser corresponding to the light combining mirror group are 45 ° ± 2 °.
7. The laser projection light source of claim 2, wherein a distance between the first reflective mirror and the first light exit region on a central axis of the first light exit region is a first distance h1, a distance between the second reflective mirror and the second light exit region on a central axis of the second light exit region is a second distance h2, a distance between the third reflective mirror and the third light exit region on a central axis of the third light exit region is a third distance h3, and the first distance h1, the second distance h2, and the third distance h3 are all 1 to 6 mm.
8. The laser projection light source of claim 1, wherein the first light exit region, the second light exit region, and the third light exit region are arranged in a direction parallel to the light exit surface of the laser.
9. The laser projection light source of claim 1, wherein the light outlet is further provided with a light homogenizing member, and the light homogenizing member is a diffusion sheet or a fisheye lens.
10. The laser projection light source of claim 1, wherein a transmission path of the third color light beam emitted from the third light emitting region between the light emitting surface of the laser and the light emitting opening is shorter than a transmission path of the first color light beam emitted from the first light emitting region between the light emitting surface of the laser and the light emitting opening, or shorter than a transmission path of the second color light beam emitted from the second light emitting region between the light emitting surface of the laser and the light emitting opening.
11. The laser projection light source of claim 2, wherein the polarization direction of the first color light beam exiting the first light exit region is the same as the polarization direction of the second color light beam exiting the second light exit region, and the polarization direction of the second color light beam exiting the second light exit region is perpendicular to the polarization direction of the third color light beam exiting the third light exit region;
A second wave plate is arranged between the first light emergent region and the first reflecting mirror plate, a third wave plate is arranged between the second light emergent region and the second reflecting mirror plate, the second wave plate is used for rotating the polarization direction of the first color light beam emergent from the first light emergent region by 90 degrees+/-10 degrees, and the third wave plate is used for rotating the polarization direction of the second color light beam emergent from the second light emergent region by 90 degrees+/-10 degrees.
12. A laser projection device, comprising a laser projection light source, a light engine and a projection lens, which are sequentially connected, wherein the laser projection light source is the laser projection light source according to any one of claims 1 to 11, the light engine is configured to modulate an illumination beam emitted by the laser projection light source to generate an image beam, and project the image beam to the projection lens, and the projection lens is configured to image the image beam.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202411404713.4A CN119225106A (en) | 2019-10-25 | 2019-10-25 | Laser projection light source and laser projection device |
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| CN202411404713.4A CN119225106A (en) | 2019-10-25 | 2019-10-25 | Laser projection light source and laser projection device |
| CN201911025064.6A CN112711166B (en) | 2019-10-25 | 2019-10-25 | Laser projection light source and laser projection device |
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| CN201911025064.6A Division CN112711166B (en) | 2019-10-25 | 2019-10-25 | Laser projection light source and laser projection device |
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| CN115308982A (en) * | 2022-08-29 | 2022-11-08 | 深圳市火乐科技发展有限公司 | Light source device and projector |
| CN115533342A (en) * | 2022-10-20 | 2022-12-30 | 深圳泰德半导体装备有限公司 | Laser cutting system |
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| US8132919B2 (en) * | 2009-04-30 | 2012-03-13 | Eastman Kodak Company | Digital projector using arrayed light sources |
| JP5895226B2 (en) * | 2010-11-30 | 2016-03-30 | パナソニックＩｐマネジメント株式会社 | Light source device and projection display device |
| CN103792769A (en) * | 2012-10-31 | 2014-05-14 | 建兴电子科技股份有限公司 | Laser projection system |
| US20140247431A1 (en) * | 2014-05-09 | 2014-09-04 | Terry James Boss | Projector with light emitting diodes |
| CN205485254U (en) * | 2016-01-14 | 2016-08-17 | 张建平 | A light source subassembly for projecting system |
| TWI609228B (en) * | 2017-02-24 | 2017-12-21 | 揚明光學股份有限公司 | Projection device and display system |
| CN107656413A (en) * | 2017-10-27 | 2018-02-02 | 苏州佳世达光电有限公司 | A kind of projection arrangement |
| CN208506475U (en) * | 2018-04-20 | 2019-02-15 | 中强光电股份有限公司 | projection device |
| CN108919595B (en) * | 2018-06-19 | 2021-04-30 | 青岛海信激光显示股份有限公司 | Three-color laser light source and laser projection television |
| CN210954576U (en) * | 2019-10-25 | 2020-07-07 | 青岛海信激光显示股份有限公司 | Laser projection light source and laser projection equipment |
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2019
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| WO2021078101A1 (en) | 2021-04-29 |
| CN112711166B (en) | 2024-10-18 |
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