CN210954575U - Laser projection light source and laser projection equipment - Google Patents
Laser projection light source and laser projection equipment Download PDFInfo
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- CN210954575U CN210954575U CN201921815992.8U CN201921815992U CN210954575U CN 210954575 U CN210954575 U CN 210954575U CN 201921815992 U CN201921815992 U CN 201921815992U CN 210954575 U CN210954575 U CN 210954575U
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Abstract
The utility model discloses a laser projection light source and laser projection equipment relates to laser projection equipment technical field. 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 utility model discloses a laser projection light source includes: the laser comprises a shell, two lasers and a light path component, wherein the shell comprises a first side wall and a second side wall, two containing openings are formed in the first side wall, and a light outlet is formed in the second side wall; the two lasers are respectively arranged at the two accommodating openings, 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 subassembly sets up in the casing, and the light path subassembly includes two and closes light lens group and two reflection pieces, and two light-emitting direction that close light lens group are relative. The utility model discloses a laser projection light source is used for laser projection equipment.
Description
Technical Field
The utility model relates to a laser projection equipment technical field especially relates 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.
SUMMERY OF THE UTILITY MODEL
The utility model provides a laser projection light source and laser projection equipment for solve how when improving the luminance that laser projection light source sent the light beam, reduce the volume of laser projection light source and the problem of structure complexity.
In order to achieve the above purpose, the utility model 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 and a second side wall, the first side wall is perpendicular to the second side wall, two containing openings are formed in the first side wall, and a light outlet is formed in the second side wall; the two lasers are respectively arranged at the two accommodating openings, 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 subassembly sets up in the casing, and the light path subassembly includes two and closes light lens group and two reflection parts, and two are closed light lens group and are used for closing the light of the multiple colour of two laser instrument outgoing respectively and restraint, and two light lens group's that close light direction is relative, and two reflection parts are used for changing two transmission paths that close the outgoing beam of light lens group respectively to make two emergent beams that close light lens group jet out towards the light exit.
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 first light emitting area, the second light emitting area and the third light emitting area of each laser are arranged in sequence, and the arrangement directions of the first light emitting area, the second light emitting area and the third light emitting area of the two lasers are opposite; 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 utility model provides a pair of laser projection light source closes the light of the multiple colour of two laser instrument outgoing through two and closes light lens group and closes the bundle respectively to change two transmission paths that close the outgoing beam of light lens group through two reflectors, so that two bundles of light after closing jet out towards the light outlet, in order to realize the stack of two bundles of light, thereby can make laser projection light source have higher luminance. Simultaneously, because the play plain noodles of the laser instrument in the laser projection light source all includes a plurality of light areas that go out, these a plurality of light areas that go out are used for the light of the multiple colour of outgoing, consequently, the utility model provides an in the laser projection light source need not to set up more quantity's lens, consequently can reduce the volume and the structure complexity of laser projection light source. Moreover, because the utility model provides an among the laser projection light source, be equipped with two holding openings on the first side wall, two lasers install respectively in two holding openings department, and consequently the circuit board of two lasers can set up to the coplane, consequently can adopt a radiator to cool off these two lasers simultaneously to can reduce the cost and the volume of the laser projection light source including radiator and circuit board.
A second aspect, the embodiment of the present invention provides a laser projection apparatus, including laser projection light source, ray apparatus and the projection lens that connect gradually, wherein, laser projection light source is above-mentioned arbitrary technical scheme laser projection light source, ray apparatus are used for modulating the illuminating beam that laser projection light source sent to generate image light beam, and throw image light beam to projection lens, projection lens is used for imaging image light beam.
The utility model provides a pair of laser projection equipment, because this laser projection equipment includes any one of above-mentioned technical scheme laser projection light source, consequently the utility model provides a laser projection equipment and above-mentioned technical scheme laser projection light source can solve the same technical problem to reach the same anticipated effect.
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 these 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 schematic view of an internal structure of a laser projection light source according to an embodiment of the present invention;
fig. 3 is one of optical diagrams of an optical path component in a laser projection light source according to an embodiment of the present invention;
fig. 4 is a second optical path diagram of an 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 view 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 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 described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 meaning 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, as shown in fig. 1 and fig. 2, the laser projection light source 1 includes: a housing 11, two lasers 12 and an optical path component 13, wherein, as shown in fig. 2, the housing 11 includes a first sidewall 200 and a second sidewall 300, the first sidewall 200 is perpendicular to the second sidewall 300, the first sidewall 200 is provided with two receiving openings 111, and the second sidewall 300 is provided with a light outlet (not shown in the figure); the two lasers 12 are respectively installed at the two accommodating openings 111, and each laser 12 emits light toward the inside of the housing 11, as shown in fig. 5, a 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. 2, the optical path assembly 13 is disposed in the housing 11, the optical path assembly 13 includes two light combining lens sets 131 and two reflectors 132, the two light combining lens sets 131 are respectively configured to combine lights of multiple colors emitted from the two lasers 12, light emitting directions (i.e., a direction X and a direction Y in fig. 3) of the two light combining lens sets 131 are opposite, and the two reflectors 132 are respectively configured to change transmission paths of emergent light beams of the two light combining lens sets 131, so that the emergent light beams of the two light combining lens sets 131 are emitted toward the light outlet.
Note that, the light emitting directions of the two light combining lens groups 131 are opposite, which means that the two light combining lens groups 131 both emit light to the area between the two light combining lens groups 131, and the light emitting directions of the two light combining lens groups 131 are opposite. The two light combining lens groups 131 may emit light to the same position in the area between the two light combining lens groups 131, or may emit light to different positions in the area between the two light combining lens groups 131, which is not specifically limited herein. In some embodiments, as shown in fig. 3, the two light combining lens groups 131 can emit light to different positions in the area between the two light combining lens groups 131.
The utility model provides a pair of laser projection light source, as shown in fig. 2, close the light of the multiple colour of two lasers 12 outgoing through two and close optical lens group 131 and close the bundle respectively to change two transmission paths that close the emergent beam of optical lens group 131 through two reflectors 132, so that two bundles of light after closing jet out towards the light outlet, in order to realize the stack of two bundles of light, thereby can make laser projection light source have higher luminance. Simultaneously, as shown in fig. 5, because the equal play plain noodles of the laser instrument in the laser projection light source 1 all includes a plurality of light areas that go out, these a plurality of light areas that go out are used for the light of the multiple colour of outgoing, consequently the utility model provides an in the laser projection light source 1 need not to set up more quantity's lens, consequently can reduce the volume and the structure complexity of laser projection light source 1. Moreover, because in the laser projection light source 1 provided by the present invention, as shown in fig. 2, two accommodating openings 111 are provided on the first side wall 200, and two lasers 12 are respectively installed at the two accommodating openings 111, so that the circuit boards 15 (as shown in fig. 1) of the two lasers 12 can be disposed to be coplanar, and thus one heat sink 16 can be adopted to simultaneously cool the two lasers 12 (as shown in fig. 1), thereby reducing the cost and volume of the laser projection light source 1 including the heat sink 16 and the circuit board 15.
In some embodiments, as shown in fig. 2, a spherical lens 14 is mounted in the light exit port, and the spherical lens 14 can converge the light beam entering the light exit port. In this way, the optical elements (such as the light guide 100 in fig. 3) 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 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. Specifically, 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.
The reflecting member 132 may be a mirror or a prism, and is not particularly limited herein. In some embodiments, as shown in fig. 3 and 4, the reflective member 132 is a mirror plate.
The light combining lens assembly 131 has various structural forms, and is not limited herein.
In some embodiments, as shown in fig. 5, the first light exiting region 121, the second light exiting region 122, and the third light exiting region 123 of each laser 12 are sequentially arranged, and the arrangement directions of the first light exiting region 121, the second light exiting region 122, and the third light exiting region 123 of the two lasers 12 are opposite; 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. In this way, the first mirror 1311, the second mirror 1312, and the third mirror 1313 can combine the three color beams emitted from the laser 12, and this configuration is simple and easy to implement.
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, the first mirrorBetween the sheet 1311 and the first light exiting region 121 at the central axis l of the first light exiting region 1211Is a first distance h1Between the second reflecting mirror 1312 and the second light emergent region 122, on the central axis l of the second light emergent region 1222Is a second distance h2Between the third mirror 1313 and the third light-exiting region 123 at the central axis l of the third light-exiting region 1233Is a third distance h3First 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. Thus, compared with the first color light beam emitted from the first light emitting area 121 and the second color light beam emitted from the second light emitting area 122, the transmission path of the third color light beam (i.e., the red light beam) emitted from the third light emitting area 123 between the light emitting surface of the laser 12 and the light outlet is short, and the light spot formed at the light outlet is small, so that the too 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 outlet can be avoided, and the diameter of the spherical lens installed in the light outlet 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 135 is disposed between the third light exiting region 123 and the third reflective mirror 1313, and the first wave plate 135 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 135, 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 136. 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 two light combining lens sets 131 when combining into one light beam, in some embodiments, as shown in fig. 3 and 4, a light homogenizing element 133 is disposed on the light incident side of the light exit. The uniformity of the light beams emitted from the two light combining lens groups 131 when combined into one light beam can be improved by the light homogenizing element 133.
In some embodiments, the light uniforming member 133 is a diffusion sheet or a fisheye lens.
In a second aspect, some embodiments of the present invention provide a laser projection apparatus, as shown in fig. 8, including laser projection light source 1, ray apparatus 2 and projection lens 3 that connect gradually, laser projection light source 1 is any embodiment in the above-mentioned first aspect laser projection light source 1, ray apparatus 2 is used for modulating the illuminating beam that laser projection light source 1 sent to generate image light beam, and projects image light beam to projection lens 3, and projection lens 3 is used for imaging image light beam.
The utility model provides a pair of laser projection equipment, because this laser projection equipment includes arbitrary embodiment in the above-mentioned first aspect laser projection light source 1, consequently the utility model provides a laser projection equipment and above-mentioned embodiment laser projection light source 1 can solve the same technical problem to reach the same anticipated effect.
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 embodiments of the present invention, but the protection 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 should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the 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 and a second side wall, the first side wall is perpendicular to the second side wall, two containing openings are formed in the first side wall, and a light outlet is formed in the second side wall;
the two lasers are respectively arranged at the two accommodating openings, 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 subassembly, the light path subassembly set up in the casing, the light path subassembly includes two and closes light lens group and two reflection parts, two close light lens group be used for respectively with the light of the multiple colour of two laser instrument outgoing closes and restraints, just the light-emitting direction of two and close light lens group is relative, two reflection parts are used for changing respectively two transmit path who closes the emergent light beam of light lens group, so that two emergent light beam orientations that close light lens group are emergent the light-emitting 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 first light-emitting area, the second light-emitting area and the third light-emitting area of each laser are sequentially arranged, and the arrangement directions of the first light-emitting area, the second light-emitting area and the third light-emitting area of the two lasers are opposite;
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.
4. The laser projection light source of claim 3, 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.
5. The laser projection light source of claim 3 or 4, 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.
6. The laser projection light source of claim 3 or 4, wherein 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 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.
7. The laser projection light source of claim 3 or 4, wherein 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 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.
8. The laser projection light source of claim 7 wherein the second wave plate is integrally formed with the third wave plate.
9. The laser projection light source of any one of claims 1 to 4, wherein a light homogenizing member is disposed 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.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021078103A1 (en) * | 2019-10-25 | 2021-04-29 | 青岛海信激光显示股份有限公司 | Laser projection light source and laser projection apparatus |
| WO2021078102A1 (en) * | 2019-10-25 | 2021-04-29 | 青岛海信激光显示股份有限公司 | Laser projection light source and laser projection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021078103A1 (en) * | 2019-10-25 | 2021-04-29 | 青岛海信激光显示股份有限公司 | Laser projection light source and laser projection apparatus |
| WO2021078102A1 (en) * | 2019-10-25 | 2021-04-29 | 青岛海信激光显示股份有限公司 | Laser projection light source and laser projection device |
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