Light source assembly, optical engine and projection device

Abstract

The application discloses a light source assembly, an optical engine and a projection device, and belongs to the technical field of optoelectronics. The light source assembly comprises a first shell, a second shell, a plurality of lasers and a plurality of light combiners, a convex lens, a mirror, a concave lens, a diffusion sheet and a converging lens; the first shell is provided with a plurality of light inlets corresponding to the plurality of lasers and a light outlet, each laser is located at a corresponding light inlet, and the plurality of light combiners are located in the first shell; the second shell is provided with a light inlet and a light outlet, the light outlet of the first shell is in communication with the light inlet of the second shell, the mirror, the concave lens and the diffusion sheet are located in the second shell, and the converging lens is located at the light outlet of the second shell. The application solves the problems of large assembly difficulty of the light source assembly, poor display effect of a projection picture of the projection device and large volume of the projection device. The application is used for light emission.

Description

Technical Field

[0001] This application relates to the field of optoelectronic technology, and in particular to a light source component, an optical engine, and a projection device. Background Technology

[0002] With the development of optoelectronic technology, the requirements for miniaturization of projection equipment and display effect of projected images are getting higher and higher.

[0003] An optical engine in a projection device is used to project the image. The optical engine includes a light source assembly, an optical engine, and a lens. The light source assembly emits light and transmits it to the optical engine. The optical engine modulates the light according to the image to be displayed and then transmits it to the lens. The lens projects the modulated light to form a projected image. In related technologies, the light source assembly includes a laser 001 fixed to a housing, a beam combiner assembly 002, a convex lens 003, a concave lens 004, and a converging lens 005. The beam combiner assembly 002, convex lens 003, concave lens 004, converging lens 005, and optical engine (… Figure 1 (Not shown) Arranged sequentially along a direction perpendicular to the light output direction (e.g., y-direction) of laser 001 (e.g., x-direction). Laser 001 can emit laser light into beam combining lens group 002. Beam combining lens 002 mixes the incoming laser light and reflects it to convex lens 003. Convex lens 003 focuses the incoming laser light to concave lens 004. Concave lens 004 collimates the incoming laser light and directs it to converging lens 004. Converging lens 004 focuses the incoming laser light to the optomechanic.

[0004] However, in related technologies, the light source assembly has many fixed parts in one housing, making the assembly of the light source assembly difficult; the projection brightness of the projection screen is low, the display effect of the projection screen is poor, and the size of the projection device is large. Summary of the Invention

[0005] This application provides a light source assembly and a projection device, which can solve the problems of difficult assembly of the light source assembly, poor display effect of the projected image, and large size of the projection device. The technical solution is as follows:

[0006] On the one hand, a light source assembly is provided, the light source assembly including: a first housing, a second housing, a plurality of lasers and a plurality of beam combining mirror groups, a convex lens, a reflector, a concave lens, a diffuser and a converging lens;

[0007] The first shell has a plurality of light inlets corresponding to the plurality of lasers respectively, and a light outlet, each of the lasers is located at a corresponding light inlet, and the plurality of light combiners are located in the first shell; the second shell has a light inlet and a light outlet, the light outlet of the first shell is in communication with the light inlet of the second shell, the mirror, the concave lens and the diffusion sheet are located in the second shell, and the converging lens is located at the light outlet of the second shell.

[0008] The lasers are used to emit laser light to the corresponding light combiners, the light combiners are used to mix and reflect the incident laser light to the convex lens, the convex lens is used to converge the incident laser light to the mirror, and the mirror is used to reflect the incident laser light so that the laser light passes through the concave lens, the diffusion sheet and the converging lens in sequence and is emitted.

[0009] In another aspect, an optical engine is provided, which includes the light source assembly, the optical engine and the lens.

[0010] In still another aspect, a projection device is provided, which includes the optical engine, a power supply, a display panel and a heat dissipation structure.

[0011] The technical scheme provided by the present application has at least the following beneficial effects:

[0012] The light source assembly provided by the present application includes a plurality of lasers, so that the brightness of the laser light emitted by the light source assembly can be high, and the display effect of the projection picture formed by the laser light is good. Moreover, each component in the light source assembly can be fixed in two shells, so that the number of components fixed in each shell is small, and the assembly difficulty of the light source assembly is small. The laser light emitted by the convex lens can be reflected by the mirror and then emitted to the concave lens and the converging lens, so that the transmission path of the laser light in the light source assembly is bent, and each optical device and the optical engine in the light source assembly can be arranged in two directions, so that the device arrangement of the light source assembly and the optical engine as a whole is compact, and therefore, the volume of the projection device in which the light source assembly is located can be small. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative effort.

[0014] Figure 1 is a structural schematic view of a light source assembly provided by the related art;

[0015] Figure 2is a structural schematic diagram of a light source assembly provided by an embodiment of the present application;

[0016] Figure 3 is a structural schematic diagram of another light source assembly provided by an embodiment of the present application;

[0017] Figure 4 is a light path diagram of laser transmission in a light source assembly provided by an embodiment of the present application;

[0018] Figure 5 is a structural schematic diagram of a first light source body provided by an embodiment of the present application;

[0019] Figure 6 is a structural schematic diagram of another first light source body provided by an embodiment of the present application;

[0020] Figure 7 is a structural schematic diagram of a second light source body provided by an embodiment of the present application;

[0021] Figure 8 is a structural schematic diagram of another second light source body provided by an embodiment of the present application;

[0022] Figure 9 is a structural schematic diagram of a laser provided by an embodiment of the present application;

[0023] Figure 10 is a structural schematic diagram of another laser provided by an embodiment of the present application;

[0024] Figure 11 is a structural schematic diagram of still another light source assembly provided by an embodiment of the present application;

[0025] Figure 12 is a structural schematic diagram of yet another light source assembly provided by an embodiment of the present application;

[0026] Figure 13 is a structural schematic diagram of still another first light source body provided by an embodiment of the present application;

[0027] Figure 14 is a structural schematic diagram of a welding tool provided by an embodiment of the present application;

[0028] Figure 15 is an assembly schematic diagram of a laser and a printed circuit board provided by an embodiment of the present application;

[0029] Figure 16 is a schematic diagram in an assembly process of a laser and a printed circuit board provided by an embodiment of the present application;

[0030] Figure 17 is a partial structural schematic diagram of a first light source body provided by an embodiment of the present application;

[0031] Figure 18 is another first light source body part structure schematic view provided by the embodiment of the present application;

[0032] Figure 19 is another second light source body structure schematic view provided by the embodiment of the present application;

[0033] Figure 20 is another light source assembly structure schematic view provided by the embodiment of the present application;

[0034] Figure 21 is a light engine structure schematic view provided by the embodiment of the present application;

[0035] Figure 22 is another light engine structure schematic view provided by the embodiment of the present application;

[0036] Figure 23 is a projection device structure schematic view provided by the embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the present application more clear, the embodiment of the present application will be further described in detail below with reference to the drawings.

[0038] With the development of photoelectric technology, the projection device is more and more widely used, and the requirements for the projection device are also higher and higher, such as the volume of the projection device is as small as possible, the display effect of the projection picture is as good as possible, and the preparation difficulty is as low as possible. The light source assembly provided by the embodiment of the present application has a smaller assembly difficulty, can ensure that the volume of the projection device is smaller, and the display effect of the projection picture is better.

[0039] Figure 2 is a light source assembly structure schematic view provided by the embodiment of the present application, Figure 3 is another light source assembly structure schematic view provided by the embodiment of the present application, Figure 3 may be the light source assembly shown in Figure 2 is a schematic view after the light source assembly shown in Figure 4 is a light path diagram of laser transmission in a light source assembly provided by the embodiment of the present application. Please combine Figure 2 , Figure 3 and Figure 4The light source assembly 10 can include a first housing 1010, a second housing 1020, a plurality of lasers 1011 and a plurality of light combiners 1012 corresponding to the plurality of lasers 1011 respectively, a convex lens 1021, a mirror 1022, a concave lens 1023, a diffusion sheet 1024, and a converging lens 1025. The first housing 1010 has a plurality of light inlets (not shown in the figure) corresponding to the plurality of lasers 1011 respectively, and a light outlet G2, each laser 1011 is located at a corresponding light inlet, and the plurality of light combiners 1012 are located in the first housing 1010. The second housing 1020 has a light inlet and a light outlet (not shown in the figure), the light outlet G2 of the first housing 1010 communicates with the light inlet of the second housing 1020, the mirror 1022 and the concave lens 1023 are located in the second housing 1020, and the converging lens 1025 is located at the light outlet of the second housing 1020.

[0040] The laser 1011 is used to emit laser light to the corresponding light combiner 1012, the light combiner 1012 is used to mix and reflect the incident laser light to the convex lens 1021, the convex lens 1021 is used to converge the incident laser light to the mirror 1022, and the mirror 1022 is used to reflect the incident laser light so that the laser light is emitted to the light machine in sequence through the concave lens 1023, the diffusion sheet 1024 and the converging lens 1025. In the embodiment of the application, the light machine can be located on the side of the converging lens 1025 away from the diffusion sheet 1024, and the light guide pipe 201 in the light machine is shown in the figure. Figure 4 Due to the effect of the mirror, the transmission path of the laser light in the light source assembly is turned, so that the various optical devices in the light source assembly and the light machine can be arranged in two directions, so that the device arrangement of the light source assembly and the light machine as a whole is relatively compact.

[0041] In the embodiment of the application, the laser 1011 and the light combiner 1012 are fixed to the first housing 1010, and the convex lens 1021, the mirror 1022, the concave lens 1023, the diffusion sheet 1024 and the converging lens 1025 are fixed to the second housing 1020, so that the various components can be fixed to the corresponding housings, and then the first housing and the second housing are fixed to complete the assembly of the light source assembly. The components fixed on the first housing and the second housing are less, so the assembly difficulty of the various components is smaller.

[0042] In summary, the light source assembly provided by the embodiment of the present application comprises a plurality of lasers, so that the brightness of the laser emitted by the light source assembly can be higher, and the display effect of the projection picture formed by the laser is better. Moreover, each component in the light source assembly can be fixed in the two housings, so that the components fixed in each housing are less, and the assembly difficulty of the light source assembly is smaller. The laser emitted by the convex lens can be reflected by the mirror and then emitted to the concave lens and the converging lens, so that the transmission path of the laser in the light source assembly is bent, and each optical device and the light machine in the light source assembly can be arranged in two directions, so that the device arrangement of the light source assembly and the light machine as a whole is more compact, and therefore, the volume of the projection device in which the light source assembly is located can be smaller.

[0043] In the embodiment of the present application, the first housing 1010, the laser 1011 and the light combiner set 1012 can constitute a first light source main body 101; the second housing 1020, the convex lens 1021, the mirror 1022, the concave lens 1023, the diffusion sheet 1024 and the converging lens 1025 can constitute a second light source main body 102. Figure 5 is a structural schematic diagram of a first light source main body provided by the embodiment of the present application, Figure 6 is a structural schematic diagram of another first light source main body provided by the embodiment of the present application, and Figure 6 is Figure 5 is a schematic diagram of the first light source main body shown in FIG. 1 after being turned over by 180 degrees. Figure 7 is a structural schematic diagram of a second light source main body provided by the embodiment of the present application, Figure 8 is a structural schematic diagram of another second light source main body provided by the embodiment of the present application, and Figure 8 is Figure 7 is a schematic diagram of the light source assembly shown in FIG. 2 after being rotated by 90 degrees.

[0044] Please refer to Figures 2 to 8Each light combining mirror group 1012 is located on the light emitting side of the corresponding laser 1011. The plurality of light combining mirror groups 1012, the convex lens 1021 and the mirror 1022 in the light source assembly 10 can be arranged in sequence along a first direction (e.g., the x direction in the figure). The mirror 1022, the concave lens 1023, the diffusion sheet 1024 and the converging lens 1025 can be arranged in sequence along a third direction (e.g., the y direction in the figure). Optionally, the first direction is perpendicular to the third direction. Each light combining mirror group 1012 is configured to converge the laser emitted by the corresponding laser 1011 to the convex lens 1021. The convex lens 1021 is configured to direct the incident laser to the mirror 1022. The mirror 1022 is configured to reflect the incident laser so that the laser passes through the concave lens 1023, the diffusion sheet 1024 and the converging lens 1025 in sequence and is then directed to the light engine. The convex lens 1021 and the concave lens 1023 in the second light source body 102 can constitute a beam narrowing component. The light beam emitted by the light source assembly can be thinned after passing through the beam narrowing component. In the embodiment, the size of the light spot formed by the laser emitted by the light combining mirror group in the first light source body 101 on the convex lens is greater than the size of the light spot formed by the laser emitted by the laser on the concave lens 1023.

[0045] In the embodiment, the laser emitted by each light combining mirror group 1012 is directed to different positions of the convex lens 1021. Each light combining mirror group 1012 forms a light spot on the convex lens 1021. The plurality of light spots formed by the laser emitted by the plurality of light combining mirror groups 1012 on the convex lens 1021 can be located on both sides of the plane in which the optical axis of the convex lens 1021 is located. In this way, the laser emitted by the convex lens can be uniformly distributed, thereby ensuring the uniformity of the laser emitted by the light source assembly, and the display effect of the projection image formed by the laser is better. Optionally, the difference between the number of light spots on both sides of the plane can be less than or equal to a number threshold. Optionally, the number threshold can be 1, so that the light spots can be distributed as uniformly as possible. Optionally, the plurality of light spots can be symmetrical about the plane in which the optical axis of the convex lens 1021 is located, so as to further ensure the uniform distribution of the laser emitted by the convex lens and improve the display effect of the projection image. It should be noted that the plurality of light spots can be located on both sides of a first plane in which the optical axis is located, but symmetrical about a second plane in which the optical axis is located. The first plane and the second plane are different. For example, the number of light spots is odd. Alternatively, when the number of light spots is odd, the first plane can also be the same as the second plane.

[0046] Optionally, in the embodiment of the present application, the laser emitted by the convex lens can also form a plurality of light spots on the concave lens and the converging lens, and the optical axes of the concave lens, the converging lens and the light guide tube in the light machine can be collinear. It should be noted that the optical axis of the light guide tube is the central axis of the light guide tube, and the light guide tube can be in the shape of a long strip, and the optical axis of the light guide tube can be perpendicular to the length direction of the light guide tube. The plurality of light spots on the concave lens and the converging lens can be located on both sides of a certain plane where the collinear optical axis is located, or can be symmetrical about a certain plane where the collinear optical axis is located. Optionally, the plane can include at least one of the meridian plane and the sagittal plane of the light guide tube, and the sagittal plane and the meridian plane of the light guide tube can both pass through the optical axis of the light guide tube, and the sagittal plane is perpendicular to the meridian plane. For example, the plurality of light spots formed on the concave lens or the converging lens can be located on both sides of the sagittal plane of the light guide tube, or on both sides of the meridian plane of the light guide tube, or on both sides of the sagittal plane of the light guide tube and on both sides of the meridian plane of the light guide tube. The plurality of light spots formed on the concave lens or the converging lens can be symmetrical about the sagittal plane of the light guide tube, or symmetrical about the meridian plane of the light guide tube, or symmetrical about both the meridian plane and the sagittal plane of the light guide tube, and the embodiment of the present application is not limited.

[0047] It should be noted that the plurality of light spots symmetrical about the certain plane in the embodiment of the present application can include the case that the plurality of light spots are absolutely symmetrical about the at least one plane, and also include the case that the plurality of light spots are approximately symmetrical about the at least one plane, and the embodiment of the present application is not limited.

[0048] In the embodiment of the present application, the plurality of lasers in the light source assembly can emit light in the same direction. For example, as shown in FIG. 10, the light source assembly includes two lasers 1011, and the two lasers 1011 are arranged along the x direction, and both of the two lasers emit light in the same direction (for example, the y direction in FIG. 10). Figure 4 Figure 4 Optionally, the light emitting directions of the lasers can be different. For example, the two lasers can also be arranged along the y direction, and one of the two lasers emits light in the y direction, and the other laser emits light in the opposite direction of the y direction. The embodiment of the present application does not limit the arrangement mode of the lasers in the light source assembly, and only needs to ensure that the plurality of light spots formed by the laser emitted by the plurality of lasers on the convex lens meet the requirements of the present application for the distribution of the light spots, for example, ensuring that the plurality of light spots are symmetrical about the plane where the optical axis of the convex lens is located.

[0049] ​Optionally, each laser in the embodiment of the present application can emit at least two colors of laser light. For example, each laser can include a plurality of light emitting regions, each light emitting region can be used to emit laser light of one color, and the colors of laser light emitted by different light emitting regions are different, and the plurality of light emitting regions can be arranged in sequence in a certain direction. For example, the plurality of light emitting regions in the laser of the light source assembly in the embodiment of the present application can be arranged in sequence in the arrangement direction of the laser and the convex lens (i.e., the x direction). The plurality of light emitting regions can include a first light emitting region and a second light emitting region, the divergence angle of laser light emitted by the first light emitting region is greater than the divergence angle of laser light emitted by the second light emitting region, and the first light emitting region can be closer to the convex lens than the second light emitting region. For example, the first light emitting region can emit red laser light, and the second light emitting region can emit blue laser light and filtered laser light. Since each laser light has a certain divergence angle, the greater the divergence angle, the larger the spot formed by the laser light, and the farther the transmission path of the laser light, the larger the spot formed. In the embodiment of the present application, the first light emitting region of the laser is closer to the convex lens than the second light emitting region, which can ensure that the transmission path of the laser light emitted by the first light emitting region is shorter than the transmission path of the laser light emitted by the second light emitting region when the laser light is incident on the convex lens, and thus the spot size of the laser light emitted by the first light emitting region on the convex lens can be smaller, and the spot size of the laser light emitted by the first light emitting region on the convex lens can be smaller. Thus, it can be ensured that the spot size of the laser light emitted by the laser on the convex lens is smaller after the laser light is mixed by the light combining lens group and reflected, so the size of the convex lens can be smaller.

[0050] In the embodiment of the present application, the laser can include at least two types of light emitting chips, different types of light emitting chips are used to emit laser light of different colors, and the area where each type of light emitting chip is located can be a light emitting region in the laser. For example, the laser in the embodiment of the present application can be a multi-chip laser diode (MCL) type laser, which can include a plurality of light emitting chips arranged in multiple rows and multiple columns, and a plurality of collimating lenses corresponding to the plurality of light emitting chips, and the plurality of collimating lenses can also be arranged in multiple rows and multiple columns. The laser light emitted by each light emitting chip can be incident on the corresponding collimating lens, and then the collimating lens collimates the laser light and emits the laser light out of the laser.

[0051] For example, Figure 9 is a structural schematic diagram of a laser provided in an embodiment of the present application, Figure 10 is a structural schematic diagram of another laser provided in an embodiment of the present application, Figure 10 may be Figure 9 is a top view of the laser. For example, Figure 9 and 10As shown, the laser 1011 can include a plurality of collimating lenses T arranged in seven rows and four columns, and a plurality of light emitting chips (not shown in the figure) arranged in seven rows and four columns corresponding to the plurality of collimating lenses T, each collimating lens T corresponding to a light emitting chip. Among them, along the first direction (such as the x direction) in Figure 9 and 10 , the first column of light emitting chips in the laser is used to emit green laser, the second column of light emitting chips is used to emit blue laser, the third and fourth columns of light emitting chips are used to emit red laser, and the area where the first column of light emitting chips in the laser is located can be a light emitting area, and the area where the second column of light emitting chips is located can also be another light emitting area, both of which can be the second light emitting area described above. The area where the third and fourth columns of light emitting chips are located can be another light emitting area, which can be the first light emitting area described above.

[0052] Optionally, please continue to refer to Figure 2 , Figure 4 and Figure 6 , each laser 1011 corresponding to the light combining mirror group 1012 can include a plurality of light combining mirrors J, each light combining mirror J can correspond to a light emitting area in the laser 1011, and is used to reflect the laser emitted by the light emitting area, and then the plurality of light combining mirrors J can be arranged in sequence along the arrangement direction (such as the x direction in Figure 4 ) of the light emitting areas in the laser 1011. The plurality of light combining mirrors J in each light combining mirror group 1012 can be arranged obliquely relative to the light emitting surface of the laser 1011 (that is, the angle between the light combining mirror and the light emitting surface is an acute angle or an obtuse angle), and the plurality of light combining mirrors J can reflect the incident laser to a target direction, which can be parallel to the arrangement direction of the plurality of light combining mirrors J, such as the x direction. In this way, part of the light combining mirrors in the light combining mirror group 1012 reflect the laser to other light combining mirrors, which can be dichroic mirrors, used to reflect the laser emitted by the light emitting area corresponding to the dichroic mirror, and transmit the laser emitted by other light emitting areas. For example, the light combining mirror corresponding to the light emitting area emitting red laser can reflect red laser and transmit blue laser and green laser. Further, the laser emitted by the light combining mirror group 1012 can be the mixed laser after the laser reflected by each light combining mirror, and the light combining mirror group 1012 has the effect of mixing the laser emitted by the corresponding laser 101. For example, the light emitted by the light combining mirror group 1012 can be white light obtained by mixing red laser, green laser and blue laser.

[0053] It should be noted that, since the beam combiner group is used to reflect the incident laser, the laser will diverge to some extent during propagation. The laser emitted from each beam combiner group needs to be directed towards different positions on the convex lens. Therefore, the distance between the beam combiner groups can meet certain conditions to ensure that the laser emitted from each beam combiner group is directed towards the convex lens and is not reflected away from the convex lens by other beam combiner groups. For example, for Figures 2 to 7 The light source assembly shown includes two lasers and two beam combiners. The two lasers are arranged along the x-direction and have the same emission direction. The two beam combiners must satisfy the following condition: the distance between the two beam combiners in the emission direction (y-direction) of either laser is between 11 mm and 13 mm. For example, the distance in the y-direction can be 12 mm. It should be noted that the distance between the two beam combiners in the y-direction is the distance between the two closest beam combiners in that direction. This ensures that the minimum gap between the edge of the laser beam reflected by the first beam combiner (away from the convex lens in the x-direction) and the second beam combiner (closest to the convex lens) is approximately 0.5 mm. This ensures that the second beam combiner does not obstruct the laser beam reflected by the first beam combiner and that the distance between the laser beams reflected by the two beam combiners is not too large. In this way, the distance between the two light spots formed on the convex lens by the lasers reflected from the two beam combiners is small. The convex lens only needs to be small in size to collect the lasers emitted from the two beam combiners, thereby reducing the size of the light source assembly. Optionally, even if the two lasers have parallel output directions, or if their output directions are opposite, the two beam combiners can still satisfy the above conditions. It should be noted that for other numbers of lasers and beam combiners, as well as other arrangements between the lasers and beam combiners, the above conditions can be satisfied even for two beam combiners that may interfere with each other; this application embodiment does not limit this.

[0054] Please continue to refer to this. Figure 6In the embodiment, the first light source body 101 can further include a printed circuit board (PCB) 1013. The plurality of lasers 1011 in the first light source body 101 are connected to the power supply through the printed circuit board 1013. The lasers 1011 can receive the current transmitted by the power supply through the printed circuit board 1013, and then emit laser beams under the excitation of the current. The printed circuit board 1013 can have a plurality of hollow regions K corresponding to the plurality of lasers 1011. Each laser 1011 is arranged in a corresponding hollow region K. Each laser 1011 can pass through the corresponding hollow region K, and the pins of the laser 1011 are fixed in the peripheral region of the hollow region K in the printed circuit board 1013. The peripheral region can be provided with a wire connected to the power supply. The pins of the laser 1011 are connected to the power supply through the connected wire. In the embodiment, the plurality of lasers are connected to the power supply through the same printed circuit board, which can reduce the volume of the printed circuit board, and there is no need to design a separate printed circuit board for each laser for assembly, thereby simplifying the design and assembly process of the light source assembly.

[0055] For example, please continue to refer to Figure 6 The first light source body 101 can include two lasers 1011. The printed circuit board 1013 has two hollow regions K corresponding to the two lasers 1011, and a wiring region (not labeled in the figure) between the two hollow regions. Optionally, the width of the wiring region in the arrangement direction of the two hollow regions ranges from 4.5 mm to 6.5 mm, and the width can be 5.5 mm. The width of the wire arranged in the wiring region can be 3.5 mm, and 1 mm of blank area can be reserved between the wire and the hollow region on both sides. It should be noted that although it is necessary to ensure that the distance between the lasers in the light source assembly is as small as possible in order to make the structure of the light source assembly more compact, if the two lasers are directly adjacent, the arrangement of the wire on the printed circuit board is difficult, and in order to ensure the normal power supply of each laser, the area occupied by the wire on the printed circuit board is large, which will cause the volume of the printed circuit board to increase. In the embodiment, there is a non-hollow wiring region between the two hollow regions corresponding to the lasers in the printed circuit board. Therefore, a certain wiring can be performed in the wiring region, which can reduce the wiring difficulty of the printed circuit board, and the area of the wire in the peripheral region of the printed circuit board can be correspondingly reduced, and the volume of the printed circuit board can be reduced in general. The width of the wiring region is small, so the distance between the lasers is small, the arrangement of the lasers is compact, and the volume of the first light source body can be small.

[0056] Optionally, Figure 11 is a structural schematic diagram of another light source assembly provided in the embodiment, Figure 12is a structural schematic diagram of another light source assembly provided in an embodiment of the present application, Figure 12 may be Figure 11 is an exploded structural schematic diagram of the light source assembly. As shown in Figure 11 and 12 As shown in the light source assembly 10 can also include a heat dissipation unit 103, which can include a heat dissipation fan 1031 and a heat pipe 1032, the heat dissipation fan 1031 is connected with the first light source body (such as the laser in the first light source body) through the heat pipe 1032, to assist in dissipating the heat generated by the laser, to avoid the heat accumulation damage to the laser, improve the service life and luminous efficiency of the laser.

[0057] In an embodiment of the present application, the light source assembly includes a plurality of lasers, such as two lasers, so that the brightness of the laser emitted by the light source assembly is higher, such as the light flux output by the light source assembly is about 10000 lumens, and the light flux output after the optical machine and the lens is greater than 3000 lumens. The two lasers can directly emit red laser, green laser and blue laser, rather than using a color laser to excite other color laser through a fluorescent material, so that the color gamut of each color laser output by the laser is wider. In this way, the brightness of the projection picture obtained by the laser output by the light source assembly provided in the embodiment of the present application is higher and the color gamut is wider, and the display effect is better.

[0058] The fixing method of each component in the first light source body will be introduced as follows:

[0059] Please continue to refer to Figure 5 and 6 The first shell can be substantially a cuboid, which can be surrounded by six walls, each wall in the first shell can be flat or concave-convex or other shapes, which are not limited in the embodiment of the present application. The plurality of light inlets in the first shell can be located on the first wall of the first shell, and the light outlet of the first shell can be located on the second wall of the first shell, and the first wall can be perpendicular to the second wall. That is, the first wall of the first shell has a plurality of hollow regions as the plurality of light inlets, and the second wall of the first shell has a hollow region as the light outlet. The side of the light inlet of the first shell referred to in the embodiment of the present application is the first wall, and the side of the light outlet is the second wall.

[0060] Figure 13 is a structural schematic diagram of another first light source body provided in an embodiment of the present application, Figure 13 may be Figure 6 is a top view of the first light source body. Please continue to refer to Figure 6 and Figure 13In the first light source body 101, the bottom plate of the laser 1011 and the side of the first shell 1010 where the light inlet is located are connected by screws. For example, the bottom plate of the laser has a plurality of third mounting holes, and the side of the first shell where the light inlet is located has a plurality of fourth mounting holes corresponding to the plurality of third mounting holes. Each fourth mounting hole can have a thread, and a screw can pass through the third mounting hole and extend into the corresponding fourth mounting hole to lock the laser and the first shell. Alternatively, please continue to refer to Figure 6 and Figure 13 In the first light source body, the printed circuit board and the side of the first shell where the light inlet is located are also connected by screws. For example, the printed circuit board has a plurality of fifth mounting holes, and the side of the first shell where the light inlet is located also has a plurality of sixth mounting holes corresponding to the plurality of fifth mounting holes. Each sixth mounting hole can have a thread, and a screw can pass through the fifth mounting hole and extend into the corresponding sixth mounting hole to lock the printed circuit board and the first shell. It should be noted that the embodiments of the present application take the example that the laser and the printed circuit board are connected to the side of the first shell where the light inlet is located by screws, which can improve the stability of the arrangement of the printed circuit board and the laser. Since the laser and the printed circuit board are fixed, the laser and the first shell can be fixed by screws, or the printed circuit board and the first shell can be fixed by screws, and the embodiments of the present application are not limited. It should be noted that the mounting holes in the light source assembly are not marked in the embodiments of the present application.

[0061] In the embodiments of the present application, the bottom plate of the laser can have a plurality of positioning holes (such as the positioning hole D1 in Figure 13 The side of the first shell where the light inlet is located can have a plurality of positioning columns corresponding to the plurality of positioning holes D1. When fixing the laser and the first shell, the positioning columns on the first shell can be inserted into the positioning holes on the laser corresponding to the positioning columns to preliminarily limit the relative position of the first shell and the laser, and then the first shell and the laser are locked by screws to complete the fixation of the laser on the first shell. The printed circuit board can also have a plurality of positioning holes (such as the positioning hole D2 in Figure 13The first housing may also have multiple positioning posts corresponding to the multiple positioning holes D2, on the side where the light inlet is located. When fixing the printed circuit board to the first housing, the positioning posts on the first housing corresponding to the printed circuit board can be inserted into the corresponding positioning holes on the printed circuit board to initially define the relative positions of the first housing and the printed circuit board. Then, screws are used to lock the first housing and the printed circuit board together to complete the fixing of the printed circuit board to the first housing. In this embodiment, the positioning posts on the first housing are inserted into the positioning holes on the laser and the printed circuit board, ensuring that the laser emitted by the laser can accurately be directed towards the beam combining mirror group corresponding to the laser in the first housing. This avoids the situation where the installation tolerance is too large when only the third mounting hole on the laser and the fourth mounting hole on the first housing are fixed with screws, resulting in the laser emitted by the laser not being accurately directed towards the beam combining mirror group.

[0062] In this embodiment, the laser can be fixed to the printed circuit board first, and then the fixed laser and printed circuit board can be fixed to the first housing. For example, it can be based on... Figure 14 The welding fixture H shown is used to assemble a laser and a printed circuit board (PCB). This welding fixture possesses key features on the first housing related to fixing the laser and PCB, such as laser positioning posts W1, PCB positioning posts W2, and a PCB support platform W3. When assembling the laser and PCB, the positioning posts on the welding fixture are first aligned with the positioning holes on the PCB, inserting the positioning posts into the corresponding positioning holes. Then, the PCB is supported on the support platform of the welding fixture. Next, as shown... Figure 15 As shown, the positioning holes on the two lasers can be aligned with the corresponding positioning posts on the welding fixture. Under the influence of gravity, each positioning post inserts into its corresponding positioning hole. The laser pins can then be overlapped with the printed circuit board (PCB), ensuring good contact between the laser pins and the PCB. Finally, solder or other welding materials can be used to solder the laser pins to the PCB to obtain... Figure 16 The structure shown is as follows. After this, the soldering fixture can be removed, and the resulting laser and printed circuit board mounting structure can be fixed to the first housing.

[0063] Alternatively, please continue to refer to Figure 6The first light source body may further include a first sealing ring M1, which can be used to seal the peripheral area of ​​the laser 1011 and the corresponding light inlet G1. For example, the first sealing ring M1 can be a sealing rubber ring. The first sealing ring M1 can be located between the laser 1011 and the peripheral area of ​​the light inlet G1 in the first wall of the first housing 1010, and in close contact with the edge area of ​​the housing in the laser 1011 and the peripheral area of ​​the light inlet G1 in the first wall of the first housing 1010, to seal the peripheral area of ​​the laser 1011 and the corresponding light inlet G1. This can prevent dust from adhering to the light-emitting surface of the laser through the gap between the laser and the first housing, thus avoiding the impact on the light emission effect of the laser. Before fixing the laser to the first housing, the first sealing ring can be placed on the side of the light inlet of the first housing. Then, when fixing the laser to the first housing with screws, the laser and the first housing will squeeze the first sealing ring to ensure that the first sealing ring is in close contact with the laser and the first wall of the first housing.

[0064] like Figure 17 and 18 As shown, the multiple beam combining mirror groups in the first housing include multiple beam combining mirrors J arranged along a first direction (e.g., the x-direction), which may be parallel to the arrangement direction of the first and second housings. The first housing has multiple sets of mirror slots C and multiple sets of pressing springs Y, each set of mirror slots C and pressing springs Y corresponding one-to-one with the beam combining mirrors J in the light source assembly; that is, each beam combining mirror J corresponds to one set of mirror slots C and one set of pressing springs Y. The two ends of each beam combining mirror J in the second direction (e.g., the z-direction in the figure) are respectively located in the corresponding set of mirror slots, and the first direction is perpendicular to the third direction. Each set of pressing springs Y is located on the side of the corresponding beam combining mirror J away from the light inlet of the first housing 1010, and on the surface of the pressing beam combining mirror Y away from the light inlet of the first housing 1010, and at the end of the pressing beam combining mirror Y close to the light outlet G2 of the first housing 1010 in the first direction.

[0065] For example, each group of mirror grooves C includes two mirror grooves C, which are respectively located on two opposite inner walls of the first shell 1010 in the third direction, and each mirror groove C is in the shape of a long strip inclined towards the light outlet G2 of the first shell 1010. Each mirror groove C is closed at the end close to the light inlet of the first shell 1010 and open at the end close to the light outlet of the first shell 1010, and the two ends of the light combining lens J in the third direction can be clamped into the corresponding group of mirror grooves C through the end of the mirror groove C close to the light outlet of the first shell 1010. The inner wall of the first shell 1010 also has a mounting table Z, and each group of pressing springs Y includes two pressing springs Y, each of which has a mounting hole, and each pressing spring Y can be fixed on the corresponding mounting table Z by a screw, thereby pressing the corresponding light combining lens J. For example, each pressing spring Y can have a plurality of pressing feet, part of which is in contact with the surface of the light combining lens J away from the light inlet of the first shell 1010 to apply pressure to the surface, and the rest of the pressing feet is in contact with the end of the light combining lens J in the first direction close to the light outlet of the first shell 1010 (such as the side of the light combining lens close to the light outlet) to apply pressure to the side, thereby achieving the fixation of the light combining lens. It should be noted that the light combining lens is in the shape of a plate, and the light combining lens has two relatively and parallel large plate surfaces and a small side surface connecting the two surfaces. In the embodiment of the present application, the surface of the light combining lens away from the first shell and the surface close to the first shell are the two plate surfaces of the light combining lens, and the surface of the light combining lens at the end close to the light outlet in the first direction is a side surface of the light combining lens.

[0066] In the embodiment of the present application, each wall of the first shell can be integrally formed, or can be assembled from independent structures, or part of the walls can be integrally formed and part of the walls can be independent, which is not limited in the embodiment of the present application. For example, please continue to refer to Figure 6 , the third wall B opposite to the first wall in the first shell 1010 of the first light source body can be a plate-shaped structure independent of other walls in the first shell, and the third wall B can have a plurality of mounting holes. The third wall B can be fixed on the other walls of the first shell 1010 by screws.

[0067] The fixing method of each component in the second light source body will be introduced as follows:

[0068] Figure 19 is another structure schematic diagram of a second light source body provided by the embodiment of the present application, Figure 19 may be Figure 7 the bottom view of the second light source body shown in Figure 8 the right view of the second light source body shown in. Please combine Figure 7 , Figure 8 and Figure 19The second light source body 102 can further include a second housing 1020 having an entrance and an exit, the exit of the first housing 1010 communicates with the entrance of the second housing 1020, the mirror 1022, the concave lens 1023 and the diffusion sheet 1024 are located in the second housing 1020, and the converging lens 1025 is located at the exit of the second housing 1020. The second housing can be substantially a quadrangular prism, and the second housing 1020 can be surrounded by six walls. Each wall in the second housing can be flat or uneven or have other shapes, which are not limited in the embodiments of the present application. The entrance of the second housing can be located on a first wall of the second housing, and the exit of the second housing can be located on a second wall of the second housing, and the first wall can be perpendicular to the second wall. That is, the hollowed-out area on the first wall of the second housing serves as the entrance of the second housing, and the hollowed-out area on the second wall of the second housing serves as the exit of the second housing. The first wall of the second housing refers to the side where the entrance of the second housing is located, and the second wall of the second housing refers to the side where the exit of the second housing is located.

[0069] In the embodiments of the present application, please continue to refer to Figure 7 , Figure 8 and Figure 19 The second housing 1020 of the second light source body 102 is provided with a mirror support F1 which is triangular. The part of the one side of the triangle in the mirror support F1 is fixed to the inner wall of the second housing, and the mirror 1022 is clamped to the part of the other side of the triangle in the mirror support F1, and the angle between the one side and the other side is an acute angle. For example, the part of the one side of the mirror support can be fixed to the inner wall of the second housing by a plurality of screws, and the second light source body further includes a mirror pressing spring (not marked in the figure) which is fixed to the side of the mirror support by a screw, and the pressing foot of the mirror pressing spring is in contact with the edge of the mirror, so as to press the mirror and fix the mirror to the mirror support. In the embodiments of the present application, when the mirror support is preliminarily fixed to the second housing, the mirror support can be slightly adjusted in angle. The mirror support can further include an angle adjusting component X, one end of the angle adjusting component X can be clamped into the accommodating groove (not shown in the figure) of the inner wall of the second housing, and the angle adjusting component can be appropriately moved in the accommodating groove. In the embodiments of the present application, the mirror can be fixed to the mirror support first, and then the mirror support fixed with the mirror is fixed to the second housing. At this time, the angle of the mirror support can be finely adjusted by the angle adjusting component, so as to ensure that the laser reflected by the mirror can accurately emit from the exit of the second housing, and then the screws for fixing the mirror support are tightened, so as to complete the fixation of the mirror support to the second housing.

[0070] In the embodiments of the present application, the second light source body can further include at least one annular support F2 fixed to the second shell. The at least one annular support F2 corresponds to at least one lens of the convex lens, the concave lens and the converging lens, and each lens of the at least one lens is clamped to the corresponding annular support F2 and covers the hollow area in the middle of the annular support. For example, please continue to refer to Figure 7 , Figure 8 and Figure 19 Each of the convex lens 1021, the concave lens 1023 and the converging lens 1025 is fixed to the second shell 1020 by an annular support F2, and the annular support F2 can be fixedly connected to the second shell 1020 by a screw. Optionally, the diffusion sheet 1024 and the concave lens 1023 can be fixed to the two sides of the same annular support F2. The convex lens 1021 can be fixed to the first wall of the second shell by the corresponding annular support F2 and located outside the accommodating space of the second shell; the diffusion sheet 1024 and the concave lens 1023 can be fixed to the second wall of the second shell by the corresponding annular support F2 and located inside the accommodating space of the second shell; the converging lens 1025 can be fixed to the second wall of the second shell by the corresponding annular support F2 and located outside the accommodating space of the second shell.

[0071] The fixing methods of the first light source body and the second light source body are introduced as follows:

[0072] Optionally, the side of the first light source body where the light outlet of the first shell is located is connected to the side of the second light source body where the light inlet of the second shell is located by a screw. Figure 20 is another structural diagram of a light source assembly provided by the embodiments of the present application. As shown in Figure 20 The side of the first shell 1010 where the light outlet is located has a plurality of first mounting holes, and the side of the second shell 1020 where the light inlet is located has a plurality of second mounting holes corresponding to the plurality of first mounting holes one by one. Each second mounting hole can have a thread, and a screw can pass through the first mounting hole and extend into the corresponding second mounting hole, thereby locking the first light source body and the second light source body. Optionally, one of the side of the first shell where the light outlet is located and the side of the second shell where the light inlet is located has a positioning column, and the other has a positioning hole corresponding to the positioning column, and the first shell and the second shell are fixedly connected by the positioning hole extending into the corresponding positioning column. Figure 20The first shell 1010 has a positioning column on the side where the light outlet is located, and the second shell 1020 has a positioning hole on the side where the light inlet is located. Alternatively, the second shell can have a positioning column, the first shell can have a positioning hole, or both the first shell and the second shell can have a positioning column and a positioning hole. The embodiments of the present application are not limited in this regard. For example, when assembling the first light source body and the second light source body, the positioning column on the first shell of the first light source body can be inserted into the positioning hole corresponding to the positioning column on the second shell of the second light source body, so as to preliminarily limit the relative position of the first light source body and the second light source body. Then, the first light source body and the second light source body are locked by screws, so as to complete the assembly of the first light source body and the second light source body.

[0073] Alternatively, as shown in Figure 20 The light source assembly further includes a second sealing ring M2, which is used to seal the peripheral area of the light outlet of the first shell 1010 and the peripheral area of the light inlet of the second shell 1020. For example, the second sealing ring can be a sealing rubber ring. The second sealing ring can be located between the second wall of the first shell and the first wall of the second shell, tightly contact the second wall of the first shell and the first wall of the second shell, and surround the light outlet of the first shell and the light inlet of the second shell, so as to seal the connection between the first shell and the second shell. In this way, dust can be prevented from adhering to the optical elements in the first shell and the second shell through the gap between the first shell and the second shell, thereby avoiding affecting the light emitting effect of the light source assembly. Before the first shell and the second shell are fixed, the second sealing ring can be placed between the first shell and the second shell, and then the positioning columns in the first shell and the second shell are inserted into the corresponding positioning holes, and the screws for fixing the first shell and the second shell are tightened. In this way, the first shell and the second shell will press the second sealing ring, so as to ensure that the second sealing ring tightly contacts the first shell and the second shell.

[0074] In summary, the light source assembly provided by the embodiments of the present application includes a plurality of lasers, so that the brightness of the laser emitted by the light source assembly can be high, and the display effect of the projection picture formed by the laser is good. Moreover, each component in the light source assembly can be fixed in two shells, so that the components fixed in each shell are less, and the assembly difficulty of the light source assembly is small. The laser emitted by the convex lens can be reflected by the reflector and then emitted to the concave lens and the converging lens. In this way, the transmission path of the laser in the light source assembly is bent, and each optical device and optical machine in the light source assembly can be arranged in two directions. The device arrangement of the light source assembly and the optical machine as a whole is compact, and therefore, the volume of the projection device where the light source assembly is located can be small.

[0075] Figure 21 is a structural schematic diagram of an optical engine provided by the embodiments of the present application, Figure 22is another structure schematic diagram of an optical engine provided by an embodiment of the present application, Figure 21 may be Figure 22 is a top view of the optical engine. As Figure 21 and 22 shown, the optical engine 001 can include a light source assembly 10, an optical engine 20 and a lens 30. The light source assembly 10 can be any of the above light source assemblies 10, the light source assembly 10 includes a first light source body 102 and a second light source body 103 connected, the second light source body 102 is connected to the opposite ends of the optical engine 20 respectively with the lens 30, and the first light source body 101 is located on the same side of the optical engine 20 with the lens 30.

[0076] The first light source body 101 is used to emit laser to the second light source body 102, the second light source body 102 is used to emit the laser emitted by the first light source body 101 to the optical engine 20, the optical engine 20 is used to modulate the laser entering and emit to the lens 30, and the lens 30 is used to project the laser entering to form a projection picture.

[0077] In the embodiment of the present application, the light source assembly realizes the turning of the optical path through the mirror, ensures that each component in the light source assembly and the optical engine can be arranged in two directions, and further ensures that the first light source body of the light source assembly and the lens can be located on the same side of the optical engine, the optical engine can be in U shape, ensures that the components in the optical engine are arranged more compactly, the optical engine occupies a smaller volume, and further reduces the volume of the projection device.

[0078] Figure 23 is a structure schematic diagram of a projection device provided by an embodiment of the present application. As Figure 23 shown, the projection device includes an optical engine 001, a power supply, a display panel (the present application takes the power supply and the display panel as the same module 002 as an example for illustration) and a heat dissipation structure 003. The optical engine 001 can be the optical engine shown in Figure 2 and 3 .

[0079] The heat dissipation structure 003 can include a heat dissipation fan. Optionally, the projection device can further include at least one sound 004. Wherein, the power supply is used to power the overall system of the projection device, such as powering the laser, the display panel, the fan and the sound; the display panel is used for signal control, such as controlling the modulation mode of the laser by the optical engine according to the input image signal; the sound is used to realize the processing and output of the sound corresponding to the projection picture; the heat dissipation structure is used to mainly dissipate heat for the overall system of the projection device, and ensure the performance stability of the system and the key components therein, which can include a heat dissipation fan connected with the optical engine, and another heat dissipation fan located at the opposite side of the heat dissipation fan. The two heat dissipation fans are located at both ends of the projection device, such as the leftmost and the rightmost, which are respectively used as the air inlet and the air outlet to form a convection air flow in the projection device to cool down the various components of the projection device.

[0080] In this application, the term "and / or" is only used to describe the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this paper generally represents an "or" relationship between the associated objects before and after it. In this application, the term "at least one of A, B and C" means that there can be seven relationships, which can represent the following seven cases: A exists alone, B exists alone, C exists alone, A and B exist together, A and C exist together, C and B exist together, and A, B and C exist together. In the embodiments of this application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. The term "multiple" means two or more, unless otherwise explicitly limited. "Approximately" means within an acceptable error range, and those skilled in the art can solve the technical problems within a certain error range and basically achieve the technical effects.

[0081] The above is only an optional embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made 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 assembly, characterized in that, The light source assembly includes a first housing, a second housing, multiple lasers and multiple beam combining mirror groups, a convex lens, a reflector, a concave lens, a diffuser, a converging lens, and a printed circuit board, the printed circuit board having multiple cutout areas corresponding to the multiple lasers. The first housing has multiple light inlets corresponding to the multiple lasers, and a light outlet. The multiple lasers have the same light emission direction. The housing wall where the light inlet is located is perpendicular to the housing wall where the light outlet is located. Each laser passes through the corresponding cutout area, and the pin of the laser is fixed to the periphery of the cutout area in the printed circuit board. The laser is connected to the power supply through the printed circuit board. The multiple beam combining mirror groups are all located in the first housing, and each beam combining mirror group is located in the emission light path of one laser and in the incident light path of the light outlet. The second housing has an inlet and an outlet, the outlet of the first housing is connected to the inlet of the second housing, the reflector, the concave lens and the diffuser shown are located in the second housing, and the converging lens is located at the outlet of the second housing; The laser is used to emit laser light to the corresponding beam combining mirror group, the beam combining mirror group is used to mix the incoming laser light and reflect it to the convex lens, the convex lens is used to converge the incoming laser light to the reflecting mirror, and the reflecting mirror is used to reflect the incoming laser light so that the laser light passes through the concave lens, the diffuser and the converging lens in sequence before being emitted. Each laser has multiple light-emitting areas, which are arranged sequentially according to the arrangement direction of the laser and the convex lens. The laser emitted by different light-emitting areas has different divergence angles. The light-emitting areas with larger divergence angles intersect with the light-emitting areas with smaller divergence angles and are close to the convex lens. The light source assembly further includes a heat dissipation unit, and the first housing and the second housing are distributed along the length of the heat dissipation unit.

2. The light source assembly according to claim 1, characterized in that, The light outlet side of the first housing is connected to the light inlet side of the second housing by screws; And / or, The base plate of the laser and the side of the first housing where the light inlet is located are connected by screws.

3. The light source assembly according to claim 1, characterized in that, One of the light outlet side of the first housing and the light inlet side of the second housing has a positioning post, and the other has a positioning hole corresponding to the positioning post. The first housing and the second housing are fixedly connected by extending into the corresponding positioning post through the positioning hole.

4. The light source assembly according to claim 1, characterized in that, The second housing is provided with a reflector bracket, which is triangular in shape; The portion of the triangle in the reflector bracket, containing one side, is fixed to the inner wall of the second housing. The reflector is snapped onto the portion of the triangle in the reflector bracket containing the other side. The angle formed by the one side and the other side is an acute angle.

5. The light source assembly according to any one of claims 1 to 4, characterized in that, Each of the light-combining mirror groups includes multiple light-combining lenses arranged along a first direction, which is parallel to the arrangement direction of the first housing and the second housing; the first housing has multiple sets of mirror slots and multiple sets of pressing springs inside, and the multiple sets of mirror slots and multiple sets of pressing springs correspond one-to-one with the light-combining lenses in the light source assembly. Each of the light-combining lenses has its two ends located in a corresponding set of mirror slots in the second direction, and the first direction is perpendicular to the second direction; the pressing spring is located on the side of the corresponding light-combining lens away from the light inlet of the first housing, and presses the side of the light-combining lens away from the light inlet of the first housing, as well as the end of the light-combining lens in the first direction close to the light outlet of the first housing.

6. The light source assembly according to any one of claims 1 to 4, characterized in that, The light source assembly further includes: at least one annular bracket fixed to the second housing; The at least one annular bracket corresponds to at least one of the convex lens, the concave lens, and the converging lens. Each of the at least one lens is snapped into the corresponding annular bracket and covers the hollow area in the middle of the annular bracket.

7. The light source assembly according to any one of claims 1 to 4, characterized in that, The light source assembly further includes: a first sealing ring; the first sealing ring is used to seal the laser and the surrounding area of ​​the corresponding light inlet; And / or, The light source assembly further includes a second sealing ring; the second sealing ring is used to seal the peripheral area of ​​the light outlet of the first housing and the peripheral area of ​​the light inlet of the second housing.

8. The light source assembly according to claim 1, characterized in that, The printed circuit board is connected to the light inlet side of the first housing by screws.

9. An optical engine, characterized in that, The optical engine includes: a light source assembly, an optical engine, and a lens as described in any one of claims 1 to 8.

10. A projection device, characterized in that, The projection device includes the optical engine, power supply, display panel, and heat dissipation structure as described in claim 9.

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