CN112711166A - Laser projection light source and laser projection equipment - Google Patents
Laser projection light source and laser projection equipment Download PDFInfo
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- CN112711166A CN112711166A CN201911025064.6A CN201911025064A CN112711166A CN 112711166 A CN112711166 A CN 112711166A CN 201911025064 A CN201911025064 A CN 201911025064A CN 112711166 A CN112711166 A CN 112711166A
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- 239000003086 colorant Substances 0.000 claims abstract description 22
- 230000003287 optical effect Effects 0.000 claims description 45
- 230000010287 polarization Effects 0.000 claims description 35
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000005286 illumination Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 7
- 239000011324 bead Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003631 expected effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 1
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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
- G03B21/145—Housing details, e.g. position adjustments thereof
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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
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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
-
- 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
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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
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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
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Projection Apparatus (AREA)
Abstract
The invention discloses a laser projection light source and laser projection equipment, and relates to the technical field of laser projection equipment. The method is used for solving the problems of reducing the volume and the structural complexity of the laser projection light source while improving the brightness of the light beam emitted by the laser projection light source. The laser projection light source of the present invention includes: the laser module 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, 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 outlet; the two lasers are respectively arranged at the containing 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, and the light emitting areas are used for emitting light with various colors; the light path component is arranged in the shell. The laser projection light source is used for laser projection equipment.
Description
Technical Field
The invention relates to the technical field of laser projection equipment, in particular to a laser projection light source and laser projection equipment.
Background
Laser projection light sources are important components of laser projection apparatuses such as laser televisions and laser projectors, and are 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 doubled by combining the light beams emitted by the plurality of lasers into one light beam. However, since the laser is usually a monochromatic laser (such as a blue laser, a red laser or a green laser), and the light beam emitted from the laser projection light source is a white light beam, a plurality of fluorescent wheels are required to be arranged to correspond to the plurality of lasers one by one, each fluorescent wheel generates laser light of another two colors under the excitation of the monochromatic laser light emitted from the laser corresponding to the fluorescent wheel, the laser light of the other two colors and the monochromatic laser light emitted from the lasers are mixed to form white light, for the purpose of mixing light, a plurality of sets of lenses are required to be arranged to correspond to the plurality of fluorescent wheels one by one, each set of lenses is used to change the transmission path of the laser light of the other two colors, so that the laser light of the other two colors and the monochromatic laser light emitted from the lasers are mixed, and after the laser light is mixed to form white light, and combining a plurality of beams of white light into one beam to improve the brightness of the beam emitted by the laser projection light source. Therefore, more parts are included in the laser projection light source, 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 light beams emitted by the laser projection light source.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a laser projection light source, including: the laser 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, wherein 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 outlet; the two lasers are respectively arranged at the containing 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, and the light emitting areas are used for emitting light with various colors; the light path component is arranged in the shell and used for respectively combining the light of multiple colors emitted by the two lasers and enabling the two combined beams of light to be emitted towards the light outlet.
In some embodiments, the light exit surface of each laser includes a first light exit region, a second light exit region, and a third light exit region; the first light emitting area is used for emitting a first color light beam; the second light emitting area is used for emitting a second color light beam; the third light-emitting area is used for emitting a third color light beam; 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 comprises two light combining lens sets and a reflector; the two light combining lens groups are respectively used for combining the light with multiple colors emitted by the two lasers, and the two light combining lens groups emit light beams towards the reflecting piece; the reflecting piece is used for changing the transmission path of the emergent light beams of the two light combining lens groups so that the emergent light beams of the two light combining lens groups are emitted from the light outlet.
In some embodiments, the first light-emitting area, the second light-emitting area and the third light-emitting area of each laser are sequentially arranged along a direction close to the reflector; each light combining lens group comprises a first reflection lens, a second reflection lens and a third reflection lens, the first reflection lens is positioned at the light emitting side of the first light emitting area of the laser corresponding to the light combining lens group, the first reflection lens reflects the first color light beam emitted from the first light emitting area, the second reflection 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 reflection lens, the second reflection lens reflects the second color light beam emitted from the second light emitting area and transmits the first color light beam reflected by the first reflection lens, the third reflection lens is positioned at the light emitting side of the third light emitting area of the laser corresponding to the light combining lens group, the first reflection lens and the second reflection lens, the third reflector reflects the third color light beam emitted by the third light-emitting area and transmits the first color light beam reflected by the first reflector and the second color light beam reflected by the second reflector; the optical axis of the first color light beam reflected by the first reflecting mirror, the optical axis of the second color light beam reflected by the second reflecting mirror and the optical axis of the third color light beam reflected by the third reflecting mirror are collinear.
In some embodiments, a distance between the first mirror plate and the first light exiting region on a central axis of the first light exiting region is a first distance; the distance between the second reflector and the second light emergent area on the central axis of the second light emergent area is a second distance; the distance between the third reflector and the third light-emitting area on the central axis of the third light-emitting area is a third distance; 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 area is the same as the polarization direction of the second color light beam emitted by the second light emitting area, 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; and a first wave plate is arranged between the third light-emitting area and the third reflector and used for rotating the polarization direction of the third color light beam emitted by the third light-emitting area by 90 degrees +/-10 degrees.
In other embodiments, the polarization direction of the first color light beam emitted by the first light emitting area is the same as the polarization direction of the second color light beam emitted by the second light emitting area, 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; a second wave plate is arranged between the first light emergent area and the first reflection mirror, a third wave plate is arranged between the second light emergent area and the second reflection mirror, the second wave plate is used for rotating the polarization direction of the first color light beam emergent from the first light emergent area 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 area by 90 degrees +/-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 exit port, the spherical lens being capable of converging a light beam entering the exit port.
In some embodiments, the light incident side of the light exit is provided with a light homogenizing element.
The laser projection light source provided by the invention combines the light of multiple colors emitted by the two lasers through the light path component, and enables the two combined beams of light to be emitted towards the light emitting port so as to realize the superposition of the multiple beams of light, thereby enabling the laser projection light source to have higher brightness. Meanwhile, the light-emitting surfaces of the lasers in the laser projection light source comprise a plurality of light-emitting areas which are used for emitting light with various colors, so that a large number of lenses are not required to be arranged in the laser projection light source provided by the invention, and the volume 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 apparatus, including a laser projection light source, an optical machine, and a projection lens, which are connected in sequence, where the laser projection light source is the laser projection light source according to any one of the above technical solutions, the optical machine is configured to modulate an illumination light beam emitted by the laser projection light source to generate an image light beam, and project the image light beam to the projection lens, and the projection lens is configured to image the image light beam.
According to the laser projection equipment provided by the invention, as the laser projection equipment comprises the laser projection light source in any technical scheme, the same technical problems can be solved and the same expected effects can be achieved by the laser projection equipment and the laser projection light source in the technical scheme.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
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 invention;
FIG. 3 is a schematic diagram of a first optical path component 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 of 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 an optical diagram of a second optical path component of 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 technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The laser projection light source is an important component of the laser projection device, and is used for providing an illumination light beam.
In a first aspect, an embodiment of the present invention provides a laser projection light source 1, where the laser projection light source 1 includes: the laser module comprises a housing 11, two lasers 12 and an optical path assembly 13, wherein, as shown in fig. 1 and fig. 2, the housing 11 comprises a first sidewall 200 and a second sidewall 300 which are opposite to each other, and a third sidewall 400 which is perpendicular to both the first sidewall 200 and the second sidewall 300, the first sidewall 200 and the second sidewall 300 are respectively provided with an accommodating opening 111, and the third sidewall 400 is provided with an optical outlet 112; the two lasers 12 are respectively installed at the accommodating openings 111 on the first side wall 200 and the second side wall 300, each laser 12 emits light toward the inside of the housing 11, as shown in fig. 5, the light emitting surface of each laser 12 includes a plurality of light emitting areas, and the light emitting areas are used for emitting light of multiple colors; as shown in fig. 3 or 8, the optical path unit 13 is disposed in the housing 11, and the optical path unit 13 is configured to combine the light beams of the plurality of colors emitted from the two lasers 12 and emit the two combined light beams toward the light exit 112.
The invention provides a laser projection light source, which combines light of multiple colors emitted by two lasers 12 through a light path component 13, and enables two combined beams of light to be emitted towards a light outlet 112 so as to realize superposition of multiple beams of light, thereby enabling the laser projection light source to have higher brightness. Meanwhile, as shown in fig. 5, the light-emitting surfaces of the lasers in the laser projection light source 1 each include a plurality of light-emitting areas for emitting light of a plurality of colors, so that the laser projection light source 1 provided by the present invention does not need to be provided with a large number of lenses, and thus 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 areas, three light emitting areas, or four light emitting areas, and the like, and is not limited in this respect. Optionally, the number of light exiting regions included in the light exiting surface of the laser 12 is equal to the number of colors emitted from the light exiting surface of the laser 12, and each light exiting region is used for emitting light of one color.
In some embodiments, as shown in fig. 5, the light exit surface of each laser 12 includes a first light exit region 121, a second light exit region 122, and a third light exit region 123; the first light emitting area 121 is used for emitting a first color light beam; the second light emitting area 122 is used for emitting a second color light beam; the third light emitting area 123 is used for emitting a third color light beam; the first color light beam, the second color light beam and the third color light beam are combined to form a white light beam. The structure is simple, and a fluorescent wheel is not required to be arranged in the laser projection light source 1, so that the volume of the laser projection light source 1 can be further reduced.
In the above-described embodiment, 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. For example, 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 area 121 is a cyan light beam, the second color light beam emitted from the second light emitting area 122 is a yellow light beam, and the third color light beam emitted from the third light emitting area 123 is a magenta light beam.
In some embodiments, a spherical lens 14 is mounted in the light exit port, and the spherical lens 14 is capable of converging the light beam entering the light exit port. In this way, the optical elements (such as the light guide 100 in fig. 1 and 2) in the subsequent optical engine of the laser projection light source 1 can be designed to be smaller, which is beneficial to reducing the size of the laser projection device.
The structure of the optical path component 13 has various forms, and as an example, the structure of the optical path component 13 can have the following two embodiments:
in the first embodiment, as shown in fig. 3 and fig. 4, the optical path assembly 13 includes two light combining lens sets 131 and a reflecting element 132; the two light combining lens groups 131 are respectively used for combining the light of multiple colors emitted by the two lasers 12, and the two light combining lens groups 131 both emit light beams towards the reflector 132; the reflector 132 is used to change the transmission path of the outgoing light beams of the two light combining lens groups 131, so that the outgoing light beams of the two light combining lens groups 131 are emitted from the light outlet 112. Thus, the light path component 13 has simple structure, low cost, small volume of the laser projection light source, low structural complexity and easy realization.
In some embodiments, as shown in FIG. 5, the first light exit region 121 of each laser 12,
The second light exiting region 122 and the third light exiting region 123 are sequentially arranged along a direction (i.e., a direction X in fig. 3 and 4) close to the reflecting member 132; as shown in fig. 3 and 4, each light combining lens set 131 includes a first reflective lens 1311, a second reflective lens 1312, and a third reflective lens 1313, the first reflective lens 1311 is located on the light emitting side of the first light emitting region 121 of the laser 12 corresponding to the light combining lens set 131, the first reflective lens 1311 reflects the first color light beam emitted from the first light emitting region 121, the second reflective lens 1312 is located on the light emitting side of the first reflective lens 1311 and the second light emitting region 122 of the laser 12 corresponding to the light combining lens set 131, the second reflective 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 reflective lens 1311, the third reflective lens 1313 is located on the light emitting side of the third light emitting region 123 of the laser 12 corresponding to the light combining lens set 131, the first reflective lens 1311, and the third reflective lens 1313 reflects the third color light beam emitted from the third light emitting region 123 and transmits the first color light beam 1311 reflected by the first reflective lens 1311 The beam and the second color beam after being reflected by the second reflection mirror 1312; the optical axis of the first color light beam reflected by the first reflecting mirror 1311, the optical axis of the second color light beam reflected by the second reflecting mirror 1312, and the optical axis of the third color light beam reflected by the third reflecting mirror 1313 are collinear. Thus, the light combining lens group 131 can combine the lights of multiple colors emitted by the laser 12, and the structure is simple, occupies a small space, and is beneficial to reducing the volume of the laser projection light source 1.
In the above-described embodiment, it should be understood that it is difficult to realize the actual processing and installation of the laser projection light source 1 by ensuring that the optical axis of the first color light beam reflected by the first reflecting mirror 1311, the optical axis of the second color light beam reflected by the second reflecting mirror 1312, and the optical axis of the third color light beam reflected by the third reflecting mirror 1313 are absolutely collinear, and therefore, the optical axis of the first color light beam reflected by the first reflecting mirror 1311, the optical axis of the second color light beam reflected by the second reflecting mirror 1312, and the optical axis of the third color light beam reflected by the third reflecting mirror 1313, which are described in the embodiments of the present application, are not necessarily absolutely collinear, but should be understood as "collinear or approximately collinear". For example, the optical axis of the first color light beam reflected by the first reflective mirror 1311, the optical axis of the second color light beam reflected by the second reflective mirror 1312, and the optical axis of the third color light beam reflected by the third reflective mirror 1313, which are described in this embodiment of the application, are collinear, which means that, among the optical axis of the first color light beam reflected by the first reflective mirror 1311, the optical axis of the second color light beam reflected by the second reflective mirror 1312, and the optical axis of the third color light beam reflected by the third reflective mirror 1313, a distance between any two optical axes is smaller than a first specific value, an included angle between any two optical axes is smaller than a second specific value, the first specific value may be 1mm, 2mm, or 3mm, and the like, and the second specific value may be 1 °, 2 °, or 3 °, and the like, and is not particularly limited herein.
The first reflective mirror 1311 may be a total reflection mirror, a dichroic plate, or another structure, and is not limited specifically herein. Illustratively, as shown in fig. 3 and 4, the first mirror plate 1311 is a total reflection mirror.
The second reflecting mirror 1312 and the third reflecting mirror 1313 may be dichroic mirrors, or may have other structures, and are not particularly limited herein. In some embodiments, as shown in fig. 3 and 4, the second mirror piece 1312 and the third mirror piece 1313 are dichroic pieces.
In some embodiments, as shown in fig. 6, between the first mirror plate 1311 and the first light exiting region 121, at the central axis l of the first light exiting region 1211Is a first distance h1(ii) a A central axis l of the second light-exiting region 122 between the second reflecting mirror 1312 and the second light-exiting region 1222Is a second distance h2(ii) a A central axis l of the third light emergent area 123 between the third reflective mirror 1313 and the third light emergent area 1233Is a third distance h3(ii) a First distance h1A second distance h2And a third distance h3All are 1-6 mm. Thus, the distance between the light combining lens group 131 and the laser 12 is moderate, 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 the collision damage caused when the light combining lens group 131 and the laser 12 are installed due to the close distance between the light combining lens group 131 and the laser 12 is avoided.
In the above embodiment, it should be noted that, as shown in fig. 6, the central axis l of the first light emergent area 1211An axis perpendicular to the light exit surface of the laser 12 and passing through the center of the first light exit region 121; the central axis l of the second light emergent area 1222An axis perpendicular to the light exit surface of the laser 12 and passing through the center of the second light exit region 122; the central axis l of the third light emitting area 1233Is an axis perpendicular to the light exit surface of the laser 12 and passing through the center of the third light exit region 123.
In some embodiments, as shown in fig. 5, the first color light beam emitted from the first light exiting region 121 is one of a blue light beam and a green light beam, the second color light beam emitted from the second light exiting region 122 is the other one of the blue light beam and the green light beam, and the third color light beam emitted from the third light exiting region 123 is a red light beam, so as to avoid a large light spot when the light beam emitted from the laser 12 is reflected by the light combining lens group 131 and the reflecting member 132 and transmitted to the light exit 112. Thus, compared with the first color light beam emitted from the first light exit area 121 and the second color light beam emitted from the second light exit area 122, the transmission path of the third color light beam (i.e., the red light beam) emitted from the third light exit area 123 between the light exit surface of the laser 12 and the light exit port 112 is short, and a light spot formed at the light exit port 112 is small, so that an excessively large light spot when the light beam emitted from the laser 12 is reflected by the light combining lens group 131 and the reflecting member 132 and transmitted to the light exit port 112 can be avoided, and the diameter of the spherical lens installed in the light exit port 112 can be reduced.
In some embodiments, as shown in fig. 5, the polarization direction of the first color light beam emitted by the first light emitting area 121 is the same as the polarization direction of the second color light beam emitted by the second light emitting area 122, and the polarization direction of the second color light beam emitted by the second light emitting area 122 is perpendicular to the polarization direction of the third color light beam emitted by the third light emitting area 123.
In the above embodiment, in order to increase the light-emitting uniformity of the laser projection light source 1, the following two optional implementations may be adopted:
in a first alternative implementation manner, as shown in fig. 6, a first wave plate 134 is disposed between the third light exiting region 123 and the third reflective mirror 1313, and the first wave plate 134 is configured to rotate the polarization direction of the third color light beam exiting from the third light exiting region 123 by 90 ° ± 10 °. In this way, the polarization direction of the light beam emitted from the third light emitting area 123 is changed by the first wave plate 134, so that the polarization direction of the light beam emitted from the third light emitting area 123 is consistent with the polarization direction of the light beam emitted from the first light emitting area 121 or the second light emitting area 122, and the uniformity of the light emitted from 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 exiting region 121 and the first reflective mirror 1311, a third wave plate is disposed between the second light exiting region 122 and the second reflective mirror 1312, the second wave plate is configured to rotate the polarization direction of the second color light beam exiting from the first light exiting region 121 by 90 ° ± 10 °, and the third wave plate is configured to rotate the polarization direction of the third color light beam exiting from the second light exiting region 122 by 90 ° ± 10 °. In this way, the polarization directions of the light beams emitted from the first light emitting area 121 and the second light emitting area 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 area 121 and the second light emitting area 122 are consistent with the polarization direction of the light beam emitted from the third light emitting area 123, and the uniformity of the light emitted from 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 small number of components, and has a low structural complexity and a low assembly difficulty.
In order to improve the uniformity of the light beams emitted from the plurality of light combining lens sets 131 when combining into one light beam, in some embodiments, as shown in fig. 4, a light homogenizing element 133 is disposed on the light incident side of the light exit 112. The uniformity of the light beams emitted from the plurality of light combining lens groups 131 when combined into one light beam can be improved by the light uniformizer 133.
In some embodiments, the light uniforming member 133 is a diffusion sheet or a fisheye lens.
In the second embodiment, as shown in fig. 8, the optical path assembly 13 includes two light combining lens sets 131; the two light combining lens groups 131 are respectively configured to combine the light of multiple colors emitted from the two lasers 12, and the two light combining lens groups 131 both emit light beams toward the light exit 112. Thus, the light path component 13 has simple structure, low cost, small volume of the laser projection light source, low structural complexity and easy realization.
In a second aspect, some embodiments of the present invention provide a laser projection apparatus, as shown in fig. 9, including a laser projection light source 1, an optical engine 2, and a projection lens 3, which are connected in sequence, where the laser projection light source 1 is the laser projection light source 1 described in any one of the embodiments of the first aspect, the optical engine 2 is configured to modulate an illumination light beam emitted by the laser projection light source 1 to generate an image light beam, and project the image light beam to the projection lens 3, and the projection lens 3 is configured to image the image light beam.
The laser projection device provided by the invention comprises the laser projection light source 1 described in any embodiment of the first aspect, so that the same technical problems can be solved and the same expected effects can be achieved with the laser projection device provided by the invention and the laser projection light source 1 described in the embodiment.
In some embodiments, the laser projection apparatus further includes a projection screen, the projection screen is disposed on the light exit path of the projection lens 3, and the projection light beam imaged by the projection lens 3 forms a projection picture on the projection screen.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A laser projection light source, comprising:
the light source comprises a shell, a light source body and a light source, 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, 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 outlet;
the two lasers are respectively arranged at the containing 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, and the light emitting areas are used for emitting light with various colors;
and the light path component is arranged in the shell and is used for respectively combining the light with multiple colors emitted by the two lasers and enabling the two combined beams of light to be emitted towards the light outlet.
2. The laser projection light source of claim 1, wherein the light-emitting surface of each laser comprises a first light-emitting area, a second light-emitting area and a third light-emitting area;
the first light emitting area is used for emitting a first color light beam;
the second light emergent area is used for emitting a second color light beam;
the third light emitting area is used for emitting a third color light beam;
the first color light beam, the second color light beam, and the third color light beam are combined to form a white light beam.
3. The laser projection light source of claim 2, wherein the light path assembly comprises two light combining lens sets and a reflector;
the two light combining lens groups are respectively used for combining the light with multiple colors emitted by the two lasers, and the two light combining lens groups emit light beams towards the reflector;
the reflecting piece is used for changing transmission paths of emergent light beams of the two light combining lens groups so that the emergent light beams of the two light combining lens groups are emitted from the light outlet.
4. The laser projection light source of claim 3, wherein the first light-exiting region, the second light-exiting region and the third light-exiting region of each laser are sequentially arranged along a direction close to the reflector;
each light combining lens group comprises a first reflection lens, a second reflection lens and a third reflection lens, the first reflection lens is located at the light emitting side of a first light emitting area of a laser device corresponding to the light combining lens group, the first reflection lens reflects a first color light beam emitted from the first light emitting area, the second reflection lens is located at a second light emitting area of the laser device corresponding to the light combining lens group and the light emitting side of the first reflection lens, the second reflection 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 reflection lens, the third reflection lens is located at the light emitting side of a third light emitting area of the laser device corresponding to the light combining lens group, the first reflection lens and the second reflection lens, the third reflection 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 reflection lens and the first color light beam reflected by the first reflection lens The second color light beam reflected by the second reflector;
the optical axis of the first color light beam reflected by the first reflecting mirror, the optical axis of the second color light beam reflected by the second reflecting mirror and the optical axis of the third color light beam reflected by the third reflecting mirror are collinear.
5. The laser projection light source of claim 4, wherein a distance between the first mirror and the first light emergent region on a central axis of the first light emergent region is a first distance;
the distance between the second reflector and the second light emergent area on the central axis of the second light emergent area is a second distance;
the distance between the third reflector and the third light-emitting area on the central axis of the third light-emitting area is a third distance;
the first distance, the second distance and the third distance are all 1-6 mm.
6. The laser projection light source of claim 4 or 5, wherein the first color light beam emitted from the first light-emitting area is one of a blue light beam and a green light beam, the second color light beam emitted from 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 from the third light-emitting area is a red light beam.
7. The laser projection light source of claim 4 or 5, wherein the polarization direction of the first color light beam emitted by the first light exit area is the same as the polarization direction of the second color light beam emitted by the second light exit area, and the polarization direction of the second color light beam emitted by the second light exit area is perpendicular to the polarization direction of the third color light beam emitted by the third light exit area;
and a first wave plate is arranged between the third light-emitting area and the third reflector, and the first wave plate is used for rotating the polarization direction of the third color light beam emitted by the third light-emitting area by 90 degrees +/-10 degrees.
8. The laser projection light source of claim 4 or 5, wherein the polarization direction of the first color light beam emitted by the first light exit area is the same as the polarization direction of the second color light beam emitted by the second light exit area, and the polarization direction of the second color light beam emitted by the second light exit area is perpendicular to the polarization direction of the third color light beam emitted by the third light exit area;
a second wave plate is arranged between the first light emitting area and the first reflection mirror, a third wave plate is arranged between the second light emitting area and the second reflection mirror, the second wave plate is used for rotating the polarization direction of the first color light beam emitted by the first light emitting area by 90 degrees +/-10 degrees, and the third wave plate is used for rotating the polarization direction of the second color light beam emitted by the second light emitting area by 90 degrees +/-10 degrees.
9. The laser projection light source of any one of claims 1 to 5, wherein a light homogenizing member is provided on a light incident side of the light exit port.
10. A laser projection device, comprising a laser projection light source, an optical machine and a projection lens, which are connected in sequence, wherein the laser projection light source is the laser projection light source according to any one of claims 1 to 9, the optical machine 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.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911025064.6A CN112711166A (en) | 2019-10-25 | 2019-10-25 | Laser projection light source and laser projection equipment |
| PCT/CN2020/121934 WO2021078101A1 (en) | 2019-10-25 | 2020-10-19 | Laser projection light source and laser projection device |
| US17/481,800 US20220004090A1 (en) | 2019-10-25 | 2021-09-22 | Laser source and laser projection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911025064.6A CN112711166A (en) | 2019-10-25 | 2019-10-25 | Laser projection light source and laser projection equipment |
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| CN112711166A true CN112711166A (en) | 2021-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911025064.6A Pending CN112711166A (en) | 2019-10-25 | 2019-10-25 | Laser projection light source and laser projection equipment |
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| CN (1) | CN112711166A (en) |
| WO (1) | WO2021078101A1 (en) |
Cited By (1)
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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 |
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| US20120133903A1 (en) * | 2010-11-30 | 2012-05-31 | Panasonic Corporation | Light source device and projection display apparatus |
| CN108508686A (en) * | 2017-02-24 | 2018-09-07 | 扬明光学股份有限公司 | 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 |
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| WO2021078101A1 (en) | 2021-04-29 |
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