Light source device and laser projection apparatus

Abstract

The application provides a light source device and a laser projection equipment. A main light source assembly is used for emitting a first color laser beam, a second color laser beam and a third color laser beam. A light combination mirror assembly is located on one side of a light outlet of the main light source assembly, and the light combination mirror assembly comprises a plurality of light combination mirror pieces. A lens assembly comprises one or more first lens structures used for converging light rays. One third color laser beam reflected and transmitted by the light combination mirror pieces and the first color laser beam reflected by the light combination mirror pieces are combined into a first light beam and enter the lens assembly. Another third color laser beam reflected and transmitted by the light combination mirror pieces and the second color laser beam reflected by the light combination mirror pieces are combined into a second light beam and enter the lens assembly. The light source device of the technical scheme of the application can improve the display quality of a projection picture of the projection equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of projection equipment, in particular to a light source device and a laser projection equipment. BACKGROUND

[0002] At present, a laser display system mainly consists of an optical engine, a heat dissipation system, an electronic control system and a sealing structure. Among these components, the most important one is the optical engine part. The optical engine consists of a light source part and an optical machine part. The light source part provides illumination for the optical machine part, and the optical machine part modulates the illumination light beam. The modulated light beam forms a projection picture after being emitted through a lens.

[0003] In a three-color laser illumination system, three kinds of lasers are mostly separated, and are combined through a dichroic mirror or an X prism. However, the light spot formed by the light combination mode of the light source device in the prior art has low coincidence degree, which reduces the color uniformity of the combined light spot, and thus leads to poor display quality of the projection picture. SUMMARY

[0004] The main purpose of the present application is to provide a light source device and a laser projection equipment, which can improve the display quality of the projection picture of the projection equipment.

[0005] In order to achieve the above purpose, according to one aspect of the present application, a light source device is provided, which comprises: a main light source assembly for emitting a first color laser light beam with a first wavelength, a second color laser light beam with a second wavelength, and a third color laser light beam with a third wavelength, the first wavelength, the second wavelength and the third wavelength being different in range; a light combination mirror assembly located on one side of an emission opening of the main light source assembly, the light combination mirror assembly comprising a plurality of light combination mirror pieces; and a lens assembly comprising one or more first lens structures for converging light rays; wherein one third color laser light beam reflected and transmitted through the light combination mirror pieces and the first color laser light beam reflected through the light combination mirror pieces are combined to form a first light beam which is incident into the lens assembly, and another third color laser light beam reflected and transmitted through the light combination mirror pieces and the second color laser light beam reflected through the light combination mirror pieces are combined to form a second light beam which is incident into the lens assembly; or one third color laser light beam reflected through the light combination mirror pieces and the first color laser light beam reflected and transmitted through the light combination mirror pieces are combined to form a first light beam which is incident into the lens assembly, and another third color laser light beam reflected through the light combination mirror pieces and the second color laser light beam reflected and transmitted through the light combination mirror pieces are combined to form a second light beam which is incident into the lens assembly.

[0006] Further, the plurality of light-combining lenses comprises a first light-combining lens and a second light-combining lens arranged along the first direction, the first light-combining lens is configured to reflect the first color laser beam and the second color laser beam and transmit the third color laser beam, and the second light-combining lens is configured to reflect the third color laser beam; or, the first light-combining lens is configured to reflect the third color laser beam and transmit the first color laser beam and the second color laser beam, and the second light-combining lens is configured to reflect the first color laser beam and the second color laser beam.

[0007] Further, the spot area formed by the first color laser beam and the second color laser beam is less than or equal to the spot area formed by the two third color laser beams; or, the spot area formed by the first color laser beam and the second color laser beam is greater than or equal to the spot area formed by the two third color laser beams.

[0008] Further, the main light source assembly comprises a first laser unit, a second laser unit, and at least two third laser units, wherein the first laser unit is configured to emit the first color laser beam, the second laser unit is configured to emit the second color laser beam, and the third laser unit is configured to emit the third color laser beam.

[0009] Further, the distance between the first laser unit and the second laser unit is equal to the distance between the two third laser units, the plurality of light-combining lenses comprises a first light-combining lens and a second light-combining lens arranged along the first direction, the first light-combining lens and the second light-combining lens are arranged obliquely and parallel, the sum of the distance between the first light-combining lens and the second light-combining lens and the thickness of the first light-combining lens in the first direction is equal to the distance between the third laser unit close to the second laser unit of the two third laser units and the first laser unit, and / or the sum of the distance between the first light-combining lens and the second light-combining lens and the thickness of the first light-combining lens in the first direction is equal to the distance between the third laser unit away from the second laser unit of the two third laser units and the second laser unit.

[0010] Further, the light source device further comprises: an auxiliary light source assembly comprising a light source configured to emit a third light beam, the third light beam being wide-spectrum light, and the first color laser beam, the second color laser beam, and the third color laser beam being narrow-spectrum light; and a coupling structure located on the light path propagation path of the third light beam, and the coupling structure is located on the light path propagation paths of the first light beam and the second light beam, the coupling structure is configured to reflect the first light beam and the second light beam and transmit the third light beam; or, the coupling structure is configured to transmit the first light beam and the second light beam and reflect the third light beam.

[0011] Further, when the coupling structure is used for reflecting the first light beam and the second light beam and transmitting the third light beam, the coupling structure is used for transmitting the third light beam in a first preset wavelength range and transmitting the third light beam in a second preset wavelength range in the first polarization state, and the coupling structure is used for reflecting the first light beam and the second light beam in the second preset wavelength range in the second polarization state, wherein the maximum value in the second preset wavelength range is less than or equal to the minimum value in the first preset wavelength range.

[0012] Further, the light source device further comprises one or more second lens structures arranged at intervals between the auxiliary light source assembly and the coupling structure, and the second lens structure is used for converging light rays.

[0013] Further, the light source device further comprises: a light guiding assembly arranged on the propagation path of the first light beam and the second light beam, the first light beam and the second light beam are reflected or transmitted by the light guiding assembly and then enter the lens assembly; a shaping assembly arranged between the light combiner assembly and the light guiding assembly, the shaping assembly is used for eliminating the polarization of the light beam and / or uniformizing the light beam; and a spot diffusing assembly comprising a diffusion member rotatably arranged relative to the lens assembly, the diffusion member is used for diffusing the light beam emitted from the lens assembly.

[0014] Further, the shaping assembly comprises a depolarization structure and a first uniformizing structure arranged on one side of the depolarization structure, the depolarization structure is used for eliminating the polarization of the light beam, the first uniformizing structure is used for uniformizing the light beam, and the depolarization structure and the first uniformizing structure are arranged in a separate body or integrally formed; or the light guiding assembly is a reflecting member.

[0015] Further, the light source device comprises two main light source assemblies arranged perpendicularly to each other and two light combiner assemblies corresponding to the two main light source assemblies to synthesize two first light beams and two second light beams; the light source device further comprises a third light combiner plate, the third light combiner plate is arranged at intervals and parallel to a plurality of light combiner plates of one of the two light combiner assemblies along a first direction, the third light combiner plate is located on the optical axis of the other of the two light combiner assemblies, and the third light combiner plate is located on the optical axis of the lens assembly; or the light source device comprises two main light source assemblies arranged perpendicularly to each other and two light combiner assemblies corresponding to the two main light source assemblies to synthesize two first light beams and two second light beams; the light source device further comprises a third light combiner plate, the third light combiner plate is used for transmitting the first light beam and the second light beam synthesized by one of the two light combiner assemblies, and the third light combiner plate is used for reflecting the first light beam and the second light beam synthesized by the other of the two light combiner assemblies.

[0016] Further, the light source device comprises two main light source assemblies arranged in parallel with each other and two light combining mirror assemblies arranged correspondingly to the two main light source assemblies to combine the two first light beams and the two second light beams; the light source device further comprises a third light combining mirror and a fourth light combining mirror arranged in a second direction and spaced from the third light combining mirror, the third light combining mirror and the fourth light combining mirror are arranged in parallel and spaced in a first direction with respect to the plurality of light combining mirror pieces of one of the two light combining mirror assemblies, the third light combining mirror and the fourth light combining mirror are located on the optical axis of the lens assembly, the reflection normal of the third light combining mirror and the reflection normal of the fourth light combining mirror are arranged perpendicularly, wherein the second direction is arranged perpendicularly to the first direction; or, the light source device comprises two main light source assemblies arranged in parallel with each other and two light combining mirror assemblies arranged correspondingly to the two main light source assemblies to combine the two first light beams and the two second light beams; the light source device further comprises a third light combining mirror and a fourth light combining mirror arranged in a second direction and spaced from the third light combining mirror, the first light beams and the second light beams combined by one of the two light combining mirror assemblies are sequentially reflected by the fourth light combining mirror and transmitted by the third light combining mirror and then enter the lens assembly, the first light beams and the second light beams combined by the other of the two light combining mirror assemblies are reflected by the third light combining mirror and then enter the lens assembly; or, the first light beams and the second light beams combined by one of the two light combining mirror assemblies are sequentially reflected by the third light combining mirror and transmitted by the fourth light combining mirror and then enter the lens assembly, the first light beams and the second light beams combined by the other of the two light combining mirror assemblies are reflected by the fourth light combining mirror and then enter the lens assembly.

[0017] Further, the light source device further comprises a first phase delay plate, the first phase delay plate is used to change the polarization direction of the first color laser beam and the second color laser beam, the first phase delay plate is located on the side of the first laser unit and the second laser unit facing the light combining mirror assembly; or, the light source device further comprises a second phase delay plate, the second phase delay plate is used to change the polarization direction of the two third color laser beams, the second phase delay plate is located on the side of the third laser unit facing the light combining mirror assembly.

[0018] According to another aspect of the present application, the present application provides a laser projection device comprising the above-mentioned light source device.

[0019] The application has the advantages that the first color laser beam and the third color laser beam are reflected and transmitted by the plurality of light combining lenses to form a first light beam, and the second color laser beam and the other third color laser beam are reflected and transmitted by the plurality of light combining lenses to form a second light beam, so that the two laser beams of different colors are combined into one, thereby improving the coincidence degree of the light spot, and improving the color uniformity of the combined light spot, and improving the display quality of the projection picture of the projection device. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings constituting a part of the specification of the application are used to provide further understanding of the application, the illustrative embodiments of the application and the description thereof are used to explain the application, and do not constitute improper limitation on the application. In the drawings:

[0021] Figure 1 A structure schematic view of a light source device of the embodiment one of the application is shown;

[0022] Figure 2 A structure schematic view of a light source device of the embodiment two of the application is shown;

[0023] Figure 3a A structure schematic view of the light source device of the embodiment three of the application is shown; Figure 2 A structure schematic view of the light source device of the embodiment four of the application is shown.

[0024] Figure 3b A structure schematic view of the light source device of the embodiment five of the application is shown; Figure 2 A structure schematic view of the light source device of the embodiment six of the application is shown;

[0025] Figure 4 A spectrum curve diagram of green laser and green LED light of the embodiment of the application is shown;

[0026] Figure 5 A transmission spectrum curve diagram of the filter of the embodiment of the application is shown;

[0027] Figure 6 A transmission spectrum curve diagram of the polarization light splitting film of the embodiment of the application is shown;

[0028] Figure 7 A structure schematic view of a light source device of the embodiment three of the application is shown; and

[0029] Figure 8 A structure schematic view of a light source device of the embodiment four of the application is shown.

[0030] Among the above drawings, the following reference signs are included:

[0031] 10. Beam combiner assembly; 11. First phase retarder; 12. Second beam combiner lens; 13. First beam combiner lens; 14. Shaping assembly; 141. Polarization depolarization structure; 142. First light homogenizing structure; 15. Second phase retarder; 20. Second lens structure; 21. Auxiliary light source assembly; 23. Third beam combiner lens; 24. Fourth beam combiner lens; 30. Lens assembly; 31. Coupling structure; 32. First lens structure; 35. Light guiding assembly; 36. Diffuser; 41. Fourth lens structure; 42. Reflection structure; 43. Third lens structure; 50. Main light source assembly; 51. First laser unit; 52. Second laser unit; 53. Third laser unit; 60. Illumination assembly; 61. Light valve; 70. Imaging assembly. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] It should be noted that in the embodiments of the present invention, parallel setting refers to parallelism with errors; perpendicular setting refers to perpendicularity with errors.

[0034] like Figure 1 As shown, Embodiment 1 of the present invention provides a light source device. The light source device includes a main light source assembly 50, a beam combining mirror assembly 10, and a lens assembly 30. The main light source assembly 50 emits a first-color laser beam with a first wavelength, a second-color laser beam with a second wavelength, and a third-color laser beam with a third wavelength, the first, second, and third wavelengths having different ranges. The beam combining mirror assembly 10 is located on one side of the light outlet of the main light source assembly 50 and includes a plurality of beam combining mirrors spaced apart. The lens assembly 30 includes one or more first lens structures 32 for converging light, the plurality of first lens structures 32 being arranged sequentially at intervals. A third-color laser beam, after being reflected and transmitted by the plurality of beam combining mirrors, is combined with a first-color laser beam, after being reflected by the plurality of beam combining mirrors, to form a first beam that enters the lens assembly 30. Similarly, another third-color laser beam, after being reflected and transmitted by the plurality of beam combining mirrors, is combined with a second-color laser beam, after being reflected by the plurality of beam combining mirrors, to form a second beam that enters the lens assembly 30.

[0035] In the technical solution, the first color laser beam and one third color laser beam are reflected and transmitted by the plurality of light combining lenses to form a first light beam, and then the first light beam is incident into the lens assembly 30; the second color laser beam and another third color laser beam are reflected and transmitted by the plurality of light combining lenses to form a second light beam, and then the second light beam is incident into the lens assembly 30. In this way, two laser beams of different colors can be combined into one, thereby improving the coincidence degree of the light spot, and further improving the color uniformity of the combined light spot, so as to improve the display quality of the projection picture of the projection device.

[0036] Specifically, in the embodiment one of the present application, the main light source assembly 50 comprises a first laser unit 51, a second laser unit 52 and two third laser units 53 which are arranged at intervals, wherein the first laser unit 51 is used to emit a first color laser beam, the second laser unit 52 is used to emit a second color laser beam, and the third laser unit 53 is used to emit a third color laser beam.

[0037] Of course, in an alternative embodiment not shown in the drawings, one third color laser beam reflected by the plurality of light combining lenses and the first color laser beam reflected and transmitted by the plurality of light combining lenses can be combined to form a first light beam which is incident into the lens assembly 30, and another third color laser beam reflected by the plurality of light combining lenses and the second color laser beam reflected and transmitted by the plurality of light combining lenses can be combined to form a second light beam which is incident into the lens assembly 30, that is, the two third laser units 53 in the embodiment one of the present application can be arranged above the first laser unit 51 and the second laser unit 52. Figure 1

[0038] Preferably, in the embodiment one of the present application, the first laser unit 51, the second laser unit 52 and the third laser unit 53 are lasers.

[0039] Specifically, in the embodiment one of the present application, the first light beam and the second light beam are incident into the lens assembly 30, and then are converged by the lens assembly 30 and emitted from the outlet of the light source device.

[0040] It should be noted that, in the embodiment one of the present application, the first color laser beam is a green laser beam, the second color laser beam is a blue laser beam, and the third color laser beam is a red laser beam. Of course, in an alternative embodiment, the colors of the first color laser beam, the second color laser beam and the third color laser beam are not limited, as long as they are one of red, green and blue.

[0041] Preferably, as shown in Figure 1 In the embodiment one of the present application, the number of the first lens structures 32 is two, one of the two first lens structures 32 is a spherical lens, and the other of the two first lens structures 32 is an aspherical lens.

[0042] ​Of course, in the embodiment not shown in the accompanying drawings, the two first lens structures 32 can be two spherical lenses or two aspherical lenses, as long as they can converge.

[0043] Of course, in embodiments not shown in the accompanying drawings, the number of first lens structures 32 may also be three or four, etc.

[0044] like Figure 1 As shown, in Embodiment 1 of the present invention, the distance between the first laser unit 51 and the second laser unit 52 is equal to the distance between the two third laser units 53. The plurality of beam combining lenses include a first beam combining lens 13 and a second beam combining lens 12 spaced apart along a first direction. The first beam combining lens 13 and the second beam combining lens 12 are inclined and parallel. The sum of the distance between the first beam combining lens 13 and the second beam combining lens 12 and the thickness of the first beam combining lens 13 in the first direction is equal to the distance between the third laser unit 53 closer to the second laser unit 52 and the first laser unit 51, and / or, the sum of the distance between the first beam combining lens 13 and the second beam combining lens 12 and the thickness of the first beam combining lens 13 in the first direction is equal to the distance between the third laser unit 53 farther from the second laser unit 52 and the second laser unit 52.

[0045] With the above configuration, the first and second color laser beams can be reflected by the first combining lens 13 and then enter the lens assembly 30. One of the two third color laser beams is reflected by the second combining lens 12 and transmitted through the first combining lens 13, and then emitted coaxially with the first color laser beam to form the first beam. The other third color laser beam is reflected by the second combining lens 12 and transmitted through the first combining lens 13, and then emitted coaxially with the second color laser beam to form the second beam. This allows two different color laser beams to be combined into one beam, thereby increasing the overlap of the light spots and improving the color uniformity of the combined light spots, thus improving the display quality of the projected image.

[0046] It should be noted that in Embodiment 1 of the present invention, the parallel arrangement of the first beam combining lens 13 and the second beam combining lens 12 means that the first beam combining lens 13 and the second beam combining lens 12 should be as parallel as possible in actual installation, that is, in an ideal state, the first beam combining lens 13 and the second beam combining lens 12 are arranged in parallel.

[0047] Specifically, in Embodiment 1 of the present invention, the first beam combining lens 13 and the second beam combining lens 12 are both tilted relative to the propagation path of the first color laser beam, the second color laser beam, or the third color laser beam, with the tilt angle preferably being 45°, so as to better form the first beam and the second beam.

[0048] Specifically, the embodiments of the present invention only use two beam combining lenses, which is simpler, smaller in size and more efficient than the traditional beam combining method where each color laser beam corresponds to one beam combining lens.

[0049] Of course, in alternative embodiments not shown in the accompanying drawings, three or four light-combining lenses may also be provided.

[0050] like Figure 1 As shown, in Embodiment 1 of the present invention, the plurality of beam combining lenses include a first beam combining lens 13 and a second beam combining lens 12 arranged at intervals along a first direction. The first beam combining lens 13 is used to reflect a first color laser beam and a second color laser beam and to transmit a third color laser beam, and the second beam combining lens 12 is used to reflect the third color laser beam.

[0051] With the above configuration, one of the two third-color laser beams is reflected sequentially by the second beam combiner 12 and transmitted through the first beam combiner 13, then coaxially emitted with the first-color laser beam reflected by the first beam combiner 13 to form the first beam. The other third-color laser beam is reflected sequentially by the second beam combiner 12 and transmitted through the first beam combiner 13, then coaxially emitted with the second-color laser beam reflected by the first beam combiner 13 to form the second beam. This allows two different colored laser beams to be combined into one beam, thereby increasing the overlap of the light spots and improving the color uniformity of the combined light spot, thus enhancing the display quality of the projected image. Specifically, the optical axis of the first-color laser beam emitted by the first laser unit coincides with the optical axis of the third-color laser beam emitted by one of the third laser units, and the optical axis of the second-color laser beam emitted by the second laser unit coincides with the optical axis of the third-color laser beam emitted by the other third laser unit.

[0052] Of course, in alternative embodiments not shown in the accompanying drawings, the first beam combining lens 13 can also be used to reflect the third color laser beam and transmit the first color laser beam and the second color laser beam, and the second beam combining lens 12 can also be used to reflect the first color laser beam and the second color laser beam. This allows two different color laser beams to be combined into one beam, thereby improving the overlap of the light spots and thus improving the color uniformity of the combined light spot, thereby improving the display quality of the projected image.

[0053] In Embodiment 1 of the present invention, the area of ​​the spot formed by the first color laser beam and the second color laser beam is equal to the area of ​​the spot formed by the two third color laser beams.

[0054] By setting the above parameters, the overlap between the two light spots can be maximized, thereby improving the color uniformity of the combined light spot and enhancing the display quality of the projected image.

[0055] Of course, in alternative embodiments, the area of ​​the spot formed by the first color laser beam and the second color laser beam can also be smaller than the area of ​​the spot formed by the two third color laser beams. This is as long as the two spots can overlap.

[0056] Of course, in alternative embodiments, the area of ​​the spot formed by the first color laser beam and the second color laser beam can also be larger than the area of ​​the spot formed by the two third color laser beams. This is as long as the two spots can overlap.

[0057] It should be noted that in Embodiment 1 of the present invention, the above-mentioned equality refers to equality with error, rather than absolute equality.

[0058] It should be noted that in Embodiment 1 of the present invention, the area of ​​the light spot formed by the first color laser beam and the second color laser beam being equal to the area of ​​the light spot formed by the two third color laser beams means that the light spot formed by the first color laser beam and the second color laser beam can coincide with the light spot formed by the two third color laser beams. That is to say, the light spot formed by the first color laser beam and the second color laser beam is coaxial with the light spot formed by the two third color laser beams, and in actual conditions, the areas of the two light spots are as close as possible, and in ideal conditions, the areas of the two light spots are equal.

[0059] Preferably, in Embodiment 1 of the present invention, the reflection normal of the first light-combining lens 13 and the reflection normal of the second light-combining lens 12 are arranged in parallel. This can improve the overlap of the light spots, thereby improving the color uniformity of the combined light spots and thus improving the display quality of the projected image.

[0060] Preferably, in Embodiment 1 of the present invention, the light rays reflected by the first beam combining lens 13 and the light rays reflected by the second beam combining lens 12 are collinear. In this way, the first color laser beam can be collinear with one of the two third color laser beams, and the second color laser beam can be collinear with the other of the two third color laser beams, thereby improving the overlap of the light spots.

[0061] like Figure 1 As shown in Embodiment 1 of the present invention, the light source device further includes an auxiliary light source component 21 and a coupling structure 31. The auxiliary light source component 21 includes a light source for emitting a third beam, which is broadband light, while the first color laser beam, the second color laser beam, and the third color laser beam are all narrow-spectrum light. The coupling structure 31 is located on the optical propagation path of the third beam, and also on the optical propagation paths of the first beam and the second beam. The coupling structure 31 is used to reflect the first beam and the second beam, and to transmit the third beam.

[0062] In the technical solution, the auxiliary light source assembly 21 and the coupling structure 31 are arranged, and the light beams emitted by the auxiliary light source assembly 21 and the light beams emitted by the main light source assembly 50 are coupled, so that the brightness of the light beams entering the lens assembly 30 can be improved, and speckle can be reduced.

[0063] Of course, in an alternative embodiment not shown in the drawings, the coupling structure 31 can also be used to transmit the first light beams and part of the second light beams and reflect the third light beams.

[0064] It should be noted that in the embodiment of the present application, the coupling structure 31 is used to reflect the first light beams and the second light beams, which means that the coupling structure 31 can reflect most of the first light beams and the second light beams, but not all of them. The coupling structure 31 is used to transmit the third light beams, which means that the coupling structure 31 can transmit most of the third light beams, but not all of them.

[0065] As shown in Figure 6 , in the embodiment of the present application, the coupling structure 31 is used to transmit part of the third light beams in the first preset wavelength range and part of the third light beams in the second preset wavelength range in the first polarization state, and the coupling structure 31 is used to reflect the first light beams and the second light beams in the second preset wavelength range in the second polarization state, wherein the maximum value in the second preset wavelength range is less than or equal to the minimum value in the first preset wavelength range.

[0066] Through the above arrangement, in the case of reflecting the first light beams and the second light beams, the coupling structure 31 not only transmits part of the third light beams in the first preset wavelength range, but also transmits part of the third light beams in the second preset wavelength range in the first polarization state, so that the transmittance of the third light beams can be improved, thereby improving the utilization rate of the third light beams.

[0067] Specifically, in the embodiment of the present application, the coupling structure 31 includes a filter and a polarization beam splitter film located on at least one side of the filter, wherein the filter can transmit light beams in a wavelength range of Figure 5 By arranging the polarization beam splitter film, the coupling structure 31 can not only transmit light beams in a wavelength range of Figure 5 (about 550nm to 610nm, i.e. the first preset wavelength), but also transmit light beams in a total wavelength range of Figure 6 (about 520nm to 610nm, i.e. the sum of the first preset wavelength and the second preset wavelength). In this way, by arranging the polarization beam splitter film, the transmission range of the coupling structure 31 can be increased in the case of reflecting the first light beams and the second light beams.

[0068] Specifically, in the embodiment of the present application, the auxiliary light source is a green LED (Laser Diode) as an example, as shown in Figure 4As shown, the spectrum of the green laser is narrow, while the spectrum of the green LED light is wide, and the laser spectrum is contained in the LED spectrum, and by setting a filter that is transparent to a wavelength range of Figure 5 , part of the green LED light beam (i.e., the third light beam) can pass through, and most of the first light beam and most of the second light beam are blocked (the wavelength ranges of the red, green, and blue lasers are all not in the wavelength range shown), so that part of the third light beam is transmitted from the filter and coupled with most of the first light beam and most of the second light beam reflected by the filter. Figure 5

[0069] It should be noted that in the first embodiment of the present application, the auxiliary light source assembly 21 is a non-laser light source, i.e., a wide-spectrum light such as an LED or a transmissive static fluorescent sheet.

[0070] Preferably, in the first embodiment of the present application, the color of the third light beam is not limited, and is usually green or red.

[0071] Since the non-laser light source has a spectral overlap region or a very close spectral interval with the same color laser light source, if only a filter is used to couple the laser and the non-laser, part of the non-laser light beam cannot pass through the filter, thereby reducing the effect of the auxiliary light source, therefore, in the first embodiment of the present application, by setting a polarization beam splitter film, at a wavelength range of about 520nm to 550nm (a range of the second preset wavelength) in Figure 6 , the polarization beam splitter film can reflect part of the first light beam and part of the second light beam in the second polarization state and transmit the third light beam in the first polarization state, and at a wavelength range of about 550nm to 610nm (a range of the first preset wavelength), the polarization beam splitter film does not have the function of polarization beam splitting, i.e., in this wavelength range, part of the third light beam is mainly transmitted by the filter, and most of the first light beam and most of the second light beam are reflected.

[0072] In the above technical solution, since the polarization states of the laser light beam and the non-laser light beam are different, by setting the polarization beam splitter film, more third light beams can pass through while preventing the first light beam and the second light beam from passing through, i.e., in the case of ensuring the reflection efficiency of the first light beam and the second light beam, the transmission efficiency of the third light beam can be improved, thereby improving the utilization rate of the auxiliary light source.

[0073] Specifically, Figure 6 ​This is the polarization beam splitting coating curve. The wavelength range that the polarization beam splitting film can pass through is larger than that of the filter. In the wavelength range that the polarization beam splitting film increases relative to the filter, it can restrict the passage of the first beam and the second beam in the second polarization state. In this way, while reflecting the first beam and the second beam, it can transmit a part of the third beam, thereby reducing the loss of the third beam.

[0074] It should be noted that in Embodiment 1 of the present invention, the second polarization state is the S state and the first polarization state is the P state.

[0075] like Figure 1 As shown, in Embodiment 1 of the present invention, the light source device further includes one or more second lens structures 20 disposed at intervals between the auxiliary light source assembly 21 and the coupling structure 31, the second lens structure 20 being used to converge light.

[0076] In the above technical solution, by setting the second lens structure 20, the third beam emitted by the auxiliary light source assembly 21 in a diffused state can be converged, thereby shaping the third beam, so that the third beam can be better coupled with the first beam and the second beam.

[0077] Preferably, such as Figure 1 As shown, in Embodiment 1 of the present invention, there are two second lens structures 20, one of which is a spherical lens and the other is an aspherical lens.

[0078] Of course, in the embodiments not shown in the accompanying drawings, the two second lens structures 20 can be two spherical lenses or two aspherical lenses, as long as they can converge.

[0079] Of course, in embodiments not shown in the accompanying drawings, the number of second lens structures 20 may also be three or four, etc.

[0080] Because the polarization direction of the red laser is different from that of the green and blue lasers, in order to better combine the red, blue, and green lasers, such as... Figure 1 As shown, in Embodiment 1 of the present invention, the light source device further includes a first phase delay plate 11. The first phase delay plate 11 is used to change the polarization direction of the first color laser beam and the second color laser beam. The first phase delay plate 11 is located on the side of the first laser unit 51 and the second laser unit 52 facing the beam combining mirror assembly 10.

[0081] By the above arrangement, the first phase retardation sheet 11 can change the polarization direction of the first color laser beam and the second color laser beam, while the polarization state of the third color laser beam does not change, so that the polarization states of the first color laser beam, the second color laser beam and the third color laser beam are the same, thereby helping to improve the consistency of the light brightness of the first color laser beam, the second color laser beam and the third color laser beam, and further improving the color uniformity of the mixed color light.

[0082] Preferably, in the first embodiment of the present application, the first phase retardation sheet 11 can be a half-wave plate or an optical rotatory plate.

[0083] As shown in Figure 1 , in the first embodiment of the present application, the light source device further comprises a second phase retardation sheet 15, the second phase retardation sheet 15 is used to change the polarization direction of the two third color laser beams, and the second phase retardation sheet 15 is located on the side of the third laser unit 53 facing the light combining mirror assembly 10.

[0084] By the above arrangement, the second phase retardation sheet 15 can change the polarization direction of the third color laser beam, while the polarization states of the first color laser beam and the second color laser beam do not change, so that the polarization states of the first color laser beam, the second color laser beam and the third color laser beam are the same, thereby helping to improve the consistency of the light brightness of the first color laser beam, the second color laser beam and the third color laser beam, and further improving the color uniformity of the mixed color light.

[0085] Preferably, in the first embodiment of the present application, the second phase retardation sheet 15 can be a half-wave plate or an optical rotatory plate.

[0086] It should be noted that in the first embodiment of the present application, one of the first phase retardation sheet 11 and the second phase retardation sheet 15 can be provided, as long as the polarization states of the first color laser beam, the second color laser beam and the third color laser beam are the same.

[0087] As shown in Figure 1 , the first embodiment of the present application provides a laser projection device. The laser projection device comprises the above-mentioned light source device, an illumination assembly 60 and an imaging assembly 70. The above-mentioned laser projection device has all the advantages of the above-mentioned light source device, which will not be described here.

[0088] As shown in Figure 1 , in the first embodiment of the present application, the illumination assembly 60 comprises a reflecting structure 42 and a third lens structure 43. The reflecting structure 42 is located on one side of the light source device; the third lens structure 43 is located between the reflecting structure 42 and the imaging assembly 70, and the light beams emitted by the light source device are reflected by the reflecting structure 42 and transmitted by the third lens structure 43, and then enter the imaging assembly 70.

[0089] By the above arrangement, the reflecting structure 42 can change the light path direction of the light beam emitted by the light source device, and the imaging component 70 is arranged on one side of the main light source component 50, so that the length of the laser projection device in the left-right direction can be reduced, and the structure of the laser projection device can be more compact; the third lens structure 43 can converge and shape the light beam reflected by the reflecting structure 42, so that the light beam can be better emitted into the imaging component 70. Figure 1

[0090] Preferably, in the embodiment one of the present application, the number of the third lens structure 43 can be one or more.

[0091] Preferably, in the embodiment one of the present application, the illumination component 60 further comprises a light valve 61 arranged between the imaging component 70 and the third lens structure 43, the light beam transmitted by the third lens structure 43 is emitted into the light valve 61 and is modulated by the light valve 61 before being emitted into the imaging component 70 to form an image, so that the third lens structure 43 can transfer the light spot to the light valve 61.

[0092] Preferably, in the embodiment one of the present application, the light valve 61 is one of LCOS (Liquid Crystal on Silicon), LCD (Liquid Crystal Display) or DMD chip.

[0093] As shown in Figure 1 and Figure 7 , in the embodiment one of the present application, the light source device further comprises a speckle elimination component arranged on the light emitting side of the lens component 30 to homogenize and shape the light beam emitted by the light source device. The speckle elimination component comprises a diffusion member 36 rotatably arranged relative to the lens component 30, the diffusion member 36 is used to diffuse the light beam emitted from the lens component 30, so as to increase the divergence angle of the light beam, thereby being beneficial to improve the speckle phenomenon.

[0094] Preferably, in the embodiment one of the present application, the diffusion member 36 is a diffusion wheel.

[0095] Specifically, in the embodiment of the present application, the illumination component 60 further comprises a second light homogenizing structure arranged on the side of the diffusion member away from the lens component 30, the second light homogenizing structure is used to homogenize the light beam diffused by the diffusion member 36, so as to improve the uniformity of the picture.

[0096] Preferably, in the embodiment of the present application, the second light homogenizing structure is a light bar.

[0097] Of course, in an alternative embodiment, the diffusion member 36 can also be arranged in the illumination component 60.

[0098] ​Preferably, in Embodiment 1 of the present invention, the lighting assembly 60 further includes a fourth lens structure 41 located between the light bar and the reflective structure 42, the fourth lens structure 41 being used to converge and shape the light beam emitted by the light source device.

[0099] Example 2

[0100] like Figure 2 As shown, the difference between Embodiment 2 and Embodiment 1 is that the light source device does not include the auxiliary light source assembly 21, the second lens structure 20, and the coupling structure 31, nor does it include the first phase retarder 11 and the second phase retarder 15. Instead, it includes a light guiding assembly 35 and a shaping assembly 14. The light guiding assembly 35 is located on the propagation path of the first and second beams, and the first and second beams are reflected by the light guiding assembly 35 before entering the lens assembly 30. The shaping assembly 14 is located between the beam combining mirror assembly 10 and the light guiding assembly 35, and is used to eliminate beam polarization and / or homogenize the beam.

[0101] With the above settings, the light guiding component 35 can reflect the first beam and the second beam so that the first beam and the second beam can enter the lens component 30. Furthermore, by setting the shaping component 14, the polarization of the first beam and the second beam can be eliminated, and the first beam can be shaped or homogenized. This helps to improve the consistency of the brightness of each color light, thereby improving the color uniformity of the mixed light.

[0102] Of course, in an alternative embodiment not shown in the accompanying drawings, the light guiding assembly 35 can also transmit the first beam and the second beam when the first beam and the second beam are parallel to the optical axis of the lens assembly 30.

[0103] Of course, in an alternative embodiment not shown in the accompanying drawings, the light guiding component 35 may also be a reflector.

[0104] like Figure 3a and Figure 3b As shown, in Embodiment 2 of the present invention, the light source device further includes a first uniform beam structure 142 located on one side of the depolarization structure 141. The depolarization structure 141 is used to eliminate the polarization of the light beam, and the first uniform beam structure 142 is used to uniform the light beam. The depolarization structure 141 and the first uniform beam structure 142 are separately arranged or integrally formed.

[0105] With the above settings, the first light-diffusing structure 142 can shape and homogenize the first beam and the second beam to achieve static diffusion, while the diffuser 36 set on the light-emitting side of the lens assembly 30 can achieve dynamic diffusion. In this way, by combining static diffusion and dynamic diffusion, the purpose of dissipating speckle and homogenizing light spots can be achieved, thereby achieving uniformity of the image.

[0106] Preferably, in Embodiment 2 of the present invention, the first light-diffusing structure 142 is a diffuser or the like.

[0107] Preferably, in Embodiment 2 of the present invention, the depolarization structure 141 is a depolarizer or a depolarizer, etc.

[0108] The other structures of the light source device in Embodiment 2 of the present invention are the same as those in Embodiment 1, and will not be described again here.

[0109] Example 3

[0110] like Figure 7 As shown, the difference between Embodiment 3 and Embodiment 1 is that the light source device in Embodiment 3 does not have an auxiliary light source assembly 21, a second lens structure 20, and a coupling structure 31. Instead, it has two main light source assemblies 50 arranged perpendicularly to each other and two beam combining mirror assemblies 10 arranged corresponding to the two main light source assemblies 50 to synthesize two first beams and two second beams. The light source device also includes a third beam combining mirror 23, which is spaced apart from and parallel to the plurality of beam combining mirrors of one of the two beam combining mirror assemblies 10 along a first direction. The third beam combining mirror 23 is located on the optical axis of the other beam combining mirror assembly 10 and is located on the optical axis of the lens assembly 30.

[0111] With the above configuration, the first beam synthesized by one of the two beam combining mirror assemblies 10 and the second beam synthesized by the other beam combining mirror assemblies 10 can be combined by the third beam combining lens 23 and then emitted coaxially. The second beam synthesized by one of the two beam combining mirror assemblies 10 and the first beam synthesized by the other beam combining mirror assemblies 10 can be combined by the third beam combining lens 23 and then emitted coaxially. This allows three different colored laser beams to be combined into one beam and then emitted into the lens assembly 30, thereby improving the overlap of the light spots and the color uniformity of the combined light spots, thus improving the display quality of the projected image.

[0112] Furthermore, by setting two main light source components 50 and coupling the beams emitted by the two main light source components 50, the brightness of the beam incident on the lens component 30 can be increased and the speckle can be reduced.

[0113] like Figure 7As shown, in the third embodiment of the present application, the light source device comprises two main light source assemblies 50 arranged perpendicularly to each other and two light combining mirror assemblies 10 arranged correspondingly to the two main light source assemblies 50 to combine two first light beams and two second light beams; the light source device further comprises a third light combining mirror sheet 23, the third light combining mirror sheet 23 is used to transmit the first light beam and the second light beam combined by one of the two light combining mirror assemblies 10, and the third light combining mirror sheet 23 is used to reflect the first light beam and the second light beam combined by the other of the two light combining mirror assemblies 10.

[0114] Through the above arrangement, the first light beam combined by one of the two light combining mirror assemblies 10 after being transmitted by the third light combining mirror sheet 23 and the second light beam combined by the other of the two light combining mirror assemblies 10 after being reflected by the third light combining mirror sheet 23 can be combined into a fourth light beam and then enter the lens assembly 30; the second light beam combined by one of the two light combining mirror assemblies 10 after being transmitted by the third light combining mirror sheet 23 and the first light beam combined by the other of the two light combining mirror assemblies 10 after being reflected by the third light combining mirror sheet 23 can be combined into a fifth light beam and then enter the lens assembly 30, so that the three laser beams of different colors can be combined into one beam and then enter the lens assembly 30, thereby improving the coincidence degree of the light spot and further improving the color uniformity of the combined light spot to improve the display quality of the projection picture.

[0115] Preferably, in the third embodiment of the present application, the light source device comprises both the first phase delay sheet 11 and the second phase delay sheet 15, wherein the second phase delay sheet 15 is used to change the polarization direction of the two third color laser beams of one of the two main light source assemblies 50, and the first phase delay sheet 11 is used to change the polarization direction of the first color laser beam and the second color laser beam of the other of the two main light source assemblies 50, so that the fourth light combining mirror sheet 24 can reflect the first light beam and the second light beam combined by one of the two light combining mirror assemblies 10, the third light combining mirror sheet 23 can transmit the first light beam and the second light beam combined by one of the two light combining mirror assemblies 10, and the third light combining mirror sheet 23 can transmit the first light beam and the second light beam combined by the other of the two light combining mirror assemblies 10.

[0116] Preferably, in the third embodiment of the present application, the third light combining mirror sheet 23 comprises a light-transmitting plate and a polarization light splitting film located on one side of the light-transmitting plate, so that the third light combining mirror sheet 23 has the polarization light splitting function. In this way, the third light combining mirror sheet 23 can reflect the first light beam and the second light beam combined by one of the two light combining mirror assemblies 10 and transmit the first light beam and the second light beam combined by the other of the two light combining mirror assemblies 10.

[0117] Of course, in alternative embodiments not shown in the accompanying drawings, the third beam combining lens 23 can be a polarizing beam splitter, as long as it can reflect the first beam and the second beam combined by one of the two beam combining lens assemblies 10 and transmit the first beam and the second beam combined by the other beam combining lens assembly 10.

[0118] It should be noted that, in Embodiment 3 of the present invention, the vertical arrangement of the two main light source components 50 means that the optical axes of the two main light source components 50 are vertically arranged.

[0119] The other structures of the light source device in Embodiment 3 of the present invention are the same as those in Embodiment 1, and will not be described again here.

[0120] Example 4

[0121] like Figure 8 As shown, the difference between Embodiment 4 and Embodiment 3 of the present invention is that the light source device includes two main light source components 50 arranged parallel to each other and two beam combining mirror components 10 arranged corresponding to the two main light source components 50 to synthesize two first beams and two second beams; the light source device also includes a third beam combining mirror 23 and a fourth beam combining mirror 24 spaced apart from the third beam combining mirror 23 along a second direction. The third beam combining mirror 23 and a plurality of beam combining mirrors of one of the two beam combining mirror components 10 are spaced apart and parallel to each other along a first direction. The fourth beam combining mirror 24 and a plurality of beam combining mirrors of the other of the two beam combining mirror components 10 are spaced apart and parallel to each other along a first direction. The third beam combining mirror 23 and the fourth beam combining mirror 24 are both located on the optical axis of the lens component 30. The reflection normal of the third beam combining mirror 23 and the reflection normal of the fourth beam combining mirror 24 are perpendicular to each other, wherein the second direction is perpendicular to the first direction.

[0122] With the above configuration, the first beam synthesized by one of the two beam combining mirror assemblies 10 is reflected by the fourth beam combining lens 24, transmitted through the third beam combining lens 23, and then coaxially incident on the lens assembly 30 with the second beam synthesized by the other beam combining mirror assembly 10 after being reflected by the third beam combining lens 23. The second beam synthesized by one of the two beam combining mirror assemblies 10 is reflected by the fourth beam combining lens 24, transmitted through the third beam combining lens 23, and then coaxially incident on the lens assembly 30 with the first beam synthesized by the other beam combining mirror assembly 10 after being reflected by the third beam combining lens 23. This allows for the combining of beams emitted from the two parallel main light source assemblies 50, thereby increasing the overlap of the light spots and improving the color uniformity of the combined light spots, thus enhancing the display quality of the projected image.

[0123] likeFigure 8 As shown in the embodiment four of the present application, the light source device comprises two main light source assemblies 50 arranged in parallel with each other and two light combining mirror assemblies 10 arranged correspondingly to the two main light source assemblies 50 to combine two first light beams and two second light beams; the light source device further comprises a third light combining mirror sheet 23 and a fourth light combining mirror sheet 24 arranged in the second direction and spaced from the third light combining mirror sheet 23, the first light beam and the second light beam combined by one of the two light combining mirror assemblies 10 are reflected by the fourth light combining mirror sheet 24 and transmitted by the third light combining mirror sheet 23 in sequence and then enter the lens assembly 30, and the first light beam and the second light beam combined by the other of the two light combining mirror assemblies 10 are reflected by the third light combining mirror sheet 23 and then enter the lens assembly 30.

[0124] Through the above arrangement, the first light beam combined by one of the two light combining mirror assemblies 10 and the second light beam combined by the other of the two light combining mirror assemblies 10 can be combined into a fourth light beam, or the second light beam combined by one of the two light combining mirror assemblies 10 and the first light beam combined by the other of the two light combining mirror assemblies 10 can be combined into a fifth light beam to enter the lens assembly 30, so that the coincidence degree of the light spot is improved, thereby improving the color uniformity of the combined light spot and improving the display quality of the projection picture.

[0125] Of course, in an alternative embodiment not shown in the drawings, the first light beam and the second light beam combined by one of the two light combining mirror assemblies 10 are reflected by the third light combining mirror sheet 23 and transmitted by the fourth light combining mirror sheet 24 in sequence and then enter the lens assembly 30, and the first light beam and the second light beam combined by the other of the two light combining mirror assemblies 10 are reflected by the fourth light combining mirror sheet 24 and then enter the lens assembly 30.

[0126] Preferably, in the embodiment four of the present application, the fourth light combining mirror sheet 24 is a reflecting mirror, so that the first light beam and the second light beam combined by one of the two light combining mirror assemblies 10 can be reflected. Of course, in an alternative embodiment not shown in the drawings, the fourth light combining mirror sheet 24 can also be a polarization beam splitter, as long as the polarization beam splitter can reflect the first light beam and the second light beam combined by one of the two light combining mirror assemblies 10.

[0127] It should be noted that in the embodiment of the present application, the second direction is arranged in parallel with the optical axis direction of the lens assembly.

[0128] The other structure of the light source device in the embodiment four of the present application is the same as that in the embodiment one, which will not be described here.

[0129] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects: by setting multiple light combining lenses, and the first color laser beam and one third color laser beam are combined into a first light beam after reflection and transmission through multiple light combining lenses, and the second color laser beam and another third color laser beam are combined into a second light beam after reflection and transmission through multiple light combining lenses, and then enter the lens assembly, so that the two different color laser beams can be combined into one beam, thereby improving the coincidence degree of the light spot, and further improving the color uniformity of the combined light spot, so as to improve the display quality of the projection picture of the projection equipment.

[0130] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A light source apparatus, characterized by comprising: The application relates to a light source device. The light source device comprises: a main light source assembly (50) for emitting a first color laser beam with a first wavelength, a second color laser beam with a second wavelength and a third color laser beam with a third wavelength, the first wavelength, the second wavelength and the third wavelength being different in range; a light combining mirror assembly (10) located on one side of an emission opening of the main light source assembly (50), the light combining mirror assembly (10) comprising a plurality of light combining mirror pieces; a lens assembly (30) comprising one or more first lens structures (32) for converging light rays; wherein one of the third color laser beams reflected and transmitted through the light combining mirror pieces and the first color laser beam reflected through the light combining mirror pieces are combined into a first light beam and enter the lens assembly (30), and another of the third color laser beams reflected and transmitted through the light combining mirror pieces and the second color laser beam reflected through the light combining mirror pieces are combined into a second light beam and enter the lens assembly (30); or one of the third color laser beams reflected through the light combining mirror pieces and the first color laser beam reflected and transmitted through the light combining mirror pieces are combined into a first light beam and enter the lens assembly (30), and another of the third color laser beams reflected through the light combining mirror pieces and the second color laser beam reflected and transmitted through the light combining mirror pieces are combined into a second light beam and enter the lens assembly (30). The light source device further comprises: an auxiliary light source assembly (21) comprising a light source for emitting a third light beam, the third light beam being wide-spectrum light, and the first color laser beam, the second color laser beam and the third color laser beam being narrow-spectrum light; a coupling structure (31) located on a light path propagation path of the third light beam, and the coupling structure (31) is located on a light path propagation path of the first light beam and the second light beam, the coupling structure (31) being used for reflecting the first light beam and the second light beam and transmitting the third light beam; or the coupling structure (31) being used for transmitting the first light beam and the second light beam and reflecting the third light beam; when the coupling structure (31) is used for reflecting the first light beam and the second light beam and transmitting the third light beam, the coupling structure (31) is used for transmitting part of the third light beam in a first preset wavelength range and transmitting part of the third light beam in a second preset wavelength range in a first polarization state, and the coupling structure (31) is used for reflecting the first light beam and the second light beam in a second polarization state in the second preset wavelength range, wherein the maximum value in the second preset wavelength range is less than or equal to the minimum value in the first preset wavelength range; the auxiliary light source assembly (21) comprises an LED or a transmission type static fluorescent sheet.

2. The light source apparatus according to claim 1, wherein The plurality of light-combining lenses comprises a first light-combining lens (13) and a second light-combining lens (12) arranged at intervals along a first direction, the first light-combining lens (13) is configured to reflect the first color laser beam and the second color laser beam and transmit the third color laser beam, and the second light-combining lens (12) is configured to reflect the third color laser beam; or, The first light-combining lens (13) is configured to reflect the third color laser beam and transmit the first color laser beam and the second color laser beam, and the second light-combining lens (12) is configured to reflect the first color laser beam and the second color laser beam.

3. The light source apparatus according to claim 1, wherein The light spot area formed by the first color laser beam and the second color laser beam is less than or equal to the light spot area formed by two third color laser beams, or the light spot area formed by the first color laser beam and the second color laser beam is greater than or equal to the light spot area formed by two third color laser beams.

4. The light source apparatus according to claim 1, wherein The main light source assembly (50) comprises a first laser unit (51), a second laser unit (52), and at least two third laser units (53), wherein the first laser unit (51) is configured to emit the first color laser beam, the second laser unit (52) is configured to emit the second color laser beam, and the third laser unit (53) is configured to emit the third color laser beam.

5. The light source apparatus according to claim 4, wherein The distance between the first laser unit (51) and the second laser unit (52) is equal to the distance between two third laser units (53), the plurality of light-combining lenses comprises a first light-combining lens (13) and a second light-combining lens (12) arranged at intervals along a first direction, the first light-combining lens (13) and the second light-combining lens (12) are arranged obliquely and parallel to each other, the sum of the distance between the first light-combining lens (13) and the second light-combining lens (12) and the thickness of the first light-combining lens (13) in the first direction is equal to the distance between the first laser unit (51) and the third laser unit (53) of the two third laser units (53) close to the second laser unit (52), and / or the sum of the distance between the first light-combining lens (13) and the second light-combining lens (12) and the thickness of the first light-combining lens (13) in the first direction is equal to the distance between the second laser unit (52) and the third laser unit (53) of the two third laser units (53) away from the second laser unit (52).

6. The light source apparatus according to claim 1, wherein The light source device further comprises one or more second lens structures (20) arranged at intervals between the auxiliary light source assembly (21) and the coupling structure (31), and the second lens structure (20) is configured to converge light rays.

7. The light source apparatus according to any one of claims 1 to 5, wherein The light source device further comprises: A light guiding assembly (35) located on the propagation path of the first light beam and the second light beam, and the first light beam and the second light beam are reflected or transmitted by the light guiding assembly (35) and then enter the lens assembly (30); A shaping assembly (14) is arranged between the light combiner assembly (10) and the light guide assembly (35), and is configured to eliminate the polarization of the light beams and / or homogenize the light beams; A diffusion spot assembly includes a diffusion member (36) rotatably arranged relative to the lens assembly (30), and is configured to diffuse the light beams emitted from the lens assembly (30).

8. The light source apparatus according to claim 7, wherein The shaping assembly includes a depolarization structure (141) configured to eliminate the polarization of the light beams, and a first homogenization structure (142) arranged on one side of the depolarization structure (141) and configured to homogenize the light beams, wherein the depolarization structure (141) and the first homogenization structure (142) are arranged separately or integrally.

9. The light source apparatus according to any one of claims 1 to 5, wherein The light source device includes two main light source assemblies (50) arranged perpendicularly to each other, and two light combiner assemblies (10) arranged correspondingly to the two main light source assemblies (50) to combine the two first light beams and the two second light beams. The light source device further includes a third light combiner sheet (23) arranged along a first direction and in parallel to the light combiner sheets of one of the two light combiner assemblies (10), and arranged on the optical axis of the other of the two light combiner assemblies (10), and arranged on the optical axis of the lens assembly (30). Alternatively, The light source device includes two main light source assemblies (50) arranged perpendicularly to each other, and two light combiner assemblies (10) arranged correspondingly to the two main light source assemblies (50) to combine the two first light beams and the two second light beams. The light source device further includes a third light combiner sheet (23) configured to transmit the first light beams and the second light beams combined by one of the two light combiner assemblies (10), and configured to reflect the first light beams and the second light beams combined by the other of the two light combiner assemblies (10).

10. The light source apparatus according to any one of claims 1 to 5, wherein The light source device includes two main light source assemblies (50) arranged perpendicularly to each other, and two light combiner assemblies (10) arranged correspondingly to the two main light source assemblies (50) to combine the two first light beams and the two second light beams. The light source device includes two main light source assemblies (50) arranged perpendicularly to each other, and two light combiner assemblies (10) arranged correspondingly to the two main light source assemblies (50) to combine the two first light beams and the two second light beams. The light source device further comprises a third light combining mirror (23) and a fourth light combining mirror (24) arranged in a second direction and spaced apart from the third light combining mirror (23), the third light combining mirror (23) is arranged in a first direction and spaced apart from the plurality of light combining mirrors of one of the two light combining mirror assemblies (10), the fourth light combining mirror (24) is arranged in the first direction and spaced apart from the plurality of light combining mirrors of the other of the two light combining mirror assemblies (10), the third light combining mirror (23) and the fourth light combining mirror (24) are located on the optical axis of the lens assembly (30), the reflection normal of the third light combining mirror (23) and the reflection normal of the fourth light combining mirror (24) are arranged perpendicularly, wherein the second direction is arranged perpendicularly to the first direction; or, The light source device comprises two main light source assemblies (50) arranged in parallel and two light combining mirror assemblies (10) arranged correspondingly to the two main light source assemblies (50) to synthesize two first light beams and two second light beams. The light source device further comprises a third light combining mirror (23) and a fourth light combining mirror (24) arranged in a second direction and spaced apart from the third light combining mirror (23), the first light beam and the second light beam synthesized by one of the two light combining mirror assemblies (10) are reflected by the fourth light combining mirror (24) in sequence, transmitted by the third light combining mirror (23) and then enter the lens assembly (30), the first light beam and the second light beam synthesized by the other of the two light combining mirror assemblies (10) are reflected by the third light combining mirror (23) and then enter the lens assembly (30); or, The first light beam and the second light beam synthesized by one of the two light combining mirror assemblies (10) are reflected by the third light combining mirror (23) in sequence, transmitted by the fourth light combining mirror (24) and then enter the lens assembly (30), the first light beam and the second light beam synthesized by the other of the two light combining mirror assemblies (10) are reflected by the fourth light combining mirror (24) and then enter the lens assembly (30).

11. The light source apparatus according to claim 4 or 5, wherein The light source device further comprises a first phase delay plate (11) for changing the polarization direction of the first color laser beam and the second color laser beam, the first phase delay plate (11) is located on the side of the first laser unit (51) and the second laser unit (52) facing the light combining mirror assembly (10); or, The light source device further comprises a second phase delay plate (15) for changing the polarization direction of the two third color laser beams, the second phase delay plate (15) is located on the side of the third laser unit (53) facing the light combining mirror assembly (10).

12. A laser projection device, comprising: The light source device comprises any one of claims 1-11.

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