Optical engine and laser projection apparatus

Abstract

An optical engine (000) and a laser projection device. The optical engine (000) comprises a housing (100), a laser (200), a DMD light valve (300) and a light path assembly (400). A first mounting hole (102) and a second mounting hole (103) are formed in a shell (100), a laser (200) is fixed outside a first containing cavity (101a) in the shell (100), so that the light emitting face of the laser (200) faces the first mounting hole (102), a DMD light valve (300) is fixed outside a second containing cavity (101b) in the shell (100), and the light receiving face of the DMD light valve (300) faces the second mounting hole (103). A laser beam emitted by the laser (200) can be emitted to the DMD light valve (300) through the first mounting hole (102), the light path assembly (400) and the second mounting hole (103) in sequence. Therefore, the laser (200), the optical path assembly (400) and the DMD light valve (300) can be integrated in the same shell (100), the size of the optical engine (000) is effectively reduced, the manufacturing cost of the optical engine (000) is reduced, the relative position accuracy of the packaged optical path is improved, and after the optical engine (000) is integrated into the laser projection equipment, the overall size of the laser projection equipment can be small.

Description

Optical engines and laser projection equipment

[0001] This application claims priority to Chinese patent application No. 202310155123.1 filed on February 22, 2023, with the invention name “Optical engine and laser projection equipment”, and claims priority to Chinese patent application No. 202310155086.4 filed on February 22, 2023, with the invention name “Engine housing, optical engine and laser projection equipment”, and also claims priority to Chinese patent application No. 202310153668.9 filed on February 22, 2023, with the invention name “Optical engine and laser projection equipment”, the entire contents of which are incorporated into this application by reference. Technical Field

[0002] The present application relates to the field of projection display, and in particular to an optical engine and a laser projection device. Background Art

[0003] The laser projection system includes a projection screen and a laser projection device. The laser projection device can project images onto the projection screen to achieve functions such as video playback.

[0004] Currently, laser projection equipment typically includes a laser light source, an illumination system, and a projection lens. The laser light source and illumination system are encapsulated in separate housings, which are then assembled together.

[0005] However, after the laser light source and the illumination system are packaged in the laser projection device in the above manner, the overall volume of the laser projection device becomes larger.

[0006] Summary of the Invention

[0007] The embodiments of the present application provide an optical engine and a laser projection device. This solves the problem of large overall volume of laser projection devices in the prior art. The technical solution is as follows:

[0008] In one aspect, an optical engine is provided, comprising:

[0009] A housing having: a first accommodating cavity and a second accommodating cavity arranged side by side and communicating with each other, a first mounting hole communicating with the first accommodating cavity, and a second mounting hole communicating with the second accommodating cavity;

[0010] a laser, wherein the laser is fixedly connected to the housing outside the first accommodating cavity, and a light-emitting surface of the laser faces the first mounting hole;

[0011] a digital micromirror device (DMD) light valve, wherein the DMD light valve is fixedly connected to the housing outside the second accommodating cavity, and a light-receiving surface of the DMD light valve faces the second mounting hole;

[0012] An optical path component, a portion of which is located in the first accommodating cavity, and another portion of which is located in the second accommodating cavity, and the optical path component is used to guide the laser beam emitted from the light-emitting surface to the light-receiving surface.

[0013] In another aspect, a laser projection device is provided, comprising:

[0014] An optical engine and a projection lens are connected to each other, wherein the optical engine is any one of the optical engines given above.

[0015] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0016] An optical engine may include: a housing, a laser, a DMD light valve, and an optical path assembly. A first mounting hole and a second mounting hole are provided in the housing of the optical engine, communicating with two accommodating cavities in the housing, and the laser is fixed outside the first accommodating cavity in the housing so that its light-emitting surface faces the first mounting hole. The DMD light valve is fixed outside the second accommodating cavity in the housing so that its light-receiving surface faces the second mounting hole. The laser beam emitted by the laser can pass through the first mounting hole, the optical path assembly, and the second mounting hole in sequence and be emitted toward the DMD light valve. That is, the laser, the optical path assembly, and the DMD light valve can be integrated into the same package housing, effectively reducing the volume of the optical engine (facilitating the miniaturization design of a laser projection device incorporating the optical engine), reducing the manufacturing cost of the optical engine, and improving the relative position accuracy of the packaged optical path. Furthermore, after the optical engine is integrated into a laser projection device, the overall volume of the laser projection device can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] FIG1 is a schematic structural diagram of an optical engine provided in an embodiment of the present application;

[0019] FIG2 is a schematic structural diagram of the other side of the optical engine shown in FIG1 ;

[0020] FIG3 is a schematic structural diagram of one side of a housing provided in an embodiment of the present application;

[0021] FIG4 is a schematic structural diagram of the other side of a housing provided in an embodiment of the present application;

[0022] FIG5 is a structural diagram of one side of another housing provided in an embodiment of the present application;

[0023] FIG6 is a schematic structural diagram of another side of another housing provided in an embodiment of the present application;

[0024] FIG7 is a top view of another housing provided in an embodiment of the present application;

[0025] FIG8 is a schematic diagram of the connection between a laser and a DMD provided in an embodiment of the present application and a housing;

[0026] FIG9 is a structural diagram of another housing provided by an embodiment of the present application from one perspective;

[0027] FIG10 is a schematic structural diagram of another side of a housing provided in an embodiment of the present application;

[0028] FIG11 is a schematic structural diagram of another housing provided in an embodiment of the present application;

[0029] FIG12 is a schematic structural diagram of one side of another optical engine provided in an embodiment of the present application;

[0030] FIG13 is a schematic structural diagram of another side of another optical engine provided in an embodiment of the present application;

[0031] FIG14 is a front view of an optical engine provided in an embodiment of the present application;

[0032] FIG15 is a rear view of an optical engine provided in an embodiment of the present application;

[0033] FIG16 is a schematic diagram of the arrangement of an optical path component in a housing provided in an embodiment of the present application;

[0034] FIG17 is a schematic diagram showing the arrangement of optical path components in an optical engine according to an embodiment of the present application;

[0035] FIG18 is a schematic diagram of the arrangement of the laser and the light combining mirror assembly in FIG17;

[0036] FIG19 is a schematic diagram of the arrangement of an optical path component in a housing provided in an embodiment of the present application;

[0037] FIG20 is a schematic structural diagram of another optical engine provided in an embodiment of the present application;

[0038] FIG21 is a schematic structural diagram of another optical engine provided in an embodiment of the present application;

[0039] FIG22 is an exploded schematic diagram of a partial structure of an optical engine provided by an embodiment of the present application;

[0040] FIG23 is a schematic diagram of the assembly of the optical engine shown in FIG22;

[0041] FIG24 is a schematic structural diagram of a first elastic piece provided in an embodiment of the present application;

[0042] FIG25 is an exploded schematic diagram of a portion of the structure of another optical engine provided in an embodiment of the present application;

[0043] FIG26 is a schematic diagram of the assembly of the optical engine shown in FIG25;

[0044] FIG27 is a schematic diagram of the layout structure at A in FIG25;

[0045] FIG28 is an exploded schematic diagram of a partial structure of another optical engine provided by an embodiment of the present application;

[0046] FIG29 is an exploded schematic diagram of a partial structure of another optical engine provided in an embodiment of the present application;

[0047] FIG30 is a schematic diagram of the assembly of the optical engine shown in FIG29;

[0048] FIG31 is a partial enlarged schematic diagram of point B in FIG29;

[0049] FIG32 is a schematic structural diagram of one side of an optical engine provided by another embodiment of the present application;

[0050] FIG33 is a schematic structural diagram of another side of an optical engine provided by another embodiment of the present application;

[0051] FIG34 is a schematic diagram of a connection between a second supporting platform and a first adjustment assembly provided in an embodiment of the present application;

[0052] FIG35 is an exploded schematic diagram of a partial structure of an optical engine provided by another embodiment of the present application;

[0053] FIG36 is a schematic diagram of the assembly of the optical engine shown in FIG35;

[0054] FIG37 is a schematic structural diagram of a fourth elastic piece provided in an embodiment of the present application;

[0055] FIG38 is an exploded schematic diagram of a portion of the structure of another optical engine provided by another embodiment of the present application;

[0056] FIG39 is a schematic diagram of the assembly of the optical engine shown in FIG38;

[0057] FIG40 is a partial enlarged schematic diagram of point C in FIG38.

[0058] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0059] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0060] Please refer to Figures 1 and 2. Figure 1 is a schematic diagram of the structure of an optical engine provided by an embodiment of the present application, and Figure 2 is a schematic diagram of the structure of the other side of the optical engine shown in Figure 1. The optical engine 000 may include: a housing 100, a laser 200, a digital micromirror device (DMD) light valve 300, and an optical path component 400.

[0061] The housing 100 in the optical engine 000 may have: a first accommodating cavity 101a and a second accommodating cavity 101b arranged side by side and communicating with each other, a first mounting hole 102 communicating with the first accommodating cavity 101a; and a second mounting hole 103 communicating with the second accommodating cavity 101b.

[0062] The laser 200 in the optical engine 000 can be fixedly connected to the housing 100 outside the first accommodating cavity 101 a in the housing 100 , and the light-emitting surface of the laser 200 can face the first mounting hole 102 in the housing 100 .

[0063] The DMD light valve 300 in the optical engine 000 can be fixedly connected to the housing 100 outside the second accommodating cavity 101 b in the housing 100 , and the light-receiving surface of the DMD light valve 300 can face the second mounting hole 103 in the housing 100 .

[0064] A portion of the optical path assembly 400 (comprising multiple optical components) in the optical engine 000 can be located within the first accommodating cavity 101a of the housing 100, while another portion of the optical path assembly 400 can be located within the second accommodating cavity 101b of the housing 100. Furthermore, the optical path assembly 400 can be used to guide the laser beam emitted from the light-emitting surface of the laser 200 to the light-receiving surface of the DMD light valve 300.

[0065] In the embodiment of the present application, a first mounting hole 102 and a second mounting hole 103 are provided in the housing 100 of the optical engine 000, communicating with the two accommodating cavities of the housing 100. The laser 200 is fixed outside the first accommodating cavity 101a of the housing 100, with the light-emitting surface of the laser 200 facing the first mounting hole 102. The DMD light valve 300 is fixed outside the second accommodating cavity 101b of the housing 100, with the light-receiving surface of the DMD light valve 300 facing the second mounting hole 103. The laser beam emitted by the laser 200 can sequentially pass through the first mounting hole 102, the optical path assembly 400, and the second mounting hole 103 to be emitted to the DMD light valve 300. In other words, the laser 200, the optical path assembly 400, and the DMD light valve 300 can be integrated into the same package, effectively reducing the size of the optical engine 000 (facilitating the miniaturization of the laser projection device incorporating the optical engine), reducing the manufacturing cost of the optical engine 000, and improving the relative positional accuracy of the packaged optical path. Moreover, after the optical engine 000 is integrated into the laser projection device, the overall volume of the laser projection device can be made smaller.

[0066] In summary, embodiments of the present application provide an optical engine that may include: a housing, a laser, a DMD light valve, and an optical path assembly. A first mounting hole and a second mounting hole are provided in the housing of the optical engine, communicating with two accommodating cavities in the housing. The laser is fixed outside the first accommodating cavity in the housing with its light-emitting surface facing the first mounting hole. The DMD light valve is fixed outside the second accommodating cavity in the housing with its light-receiving surface facing the second mounting hole. The laser beam emitted by the laser can sequentially pass through the first mounting hole, the optical path assembly, and the second mounting hole toward the DMD light valve. In other words, the laser, the optical path assembly, and the DMD light valve can be integrated into the same package housing, effectively reducing the size of the optical engine (facilitating the miniaturization of the laser projection device incorporating the optical engine), reducing the manufacturing cost of the optical engine, and improving the relative position accuracy of the packaged optical path. Furthermore, after the optical engine is integrated into the laser projection device, the overall size of the laser projection device can be reduced.

[0067] In the present application, there are multiple optional implementations for the arrangement of the mounting holes and the accommodating cavity in the housing. The following embodiments of the present application are schematically described using three optional implementations as examples:

[0068] In a first alternative implementation, as shown in Figures 1 and 2 , the first mounting hole 102 and the second mounting hole 103 in the housing 100 can be located on opposite sides of the housing 100. For example, if the housing 100 has opposite sides a1 and a2, the first mounting hole 102 can be located on the a1 side of the housing 100, and the second mounting hole 103 can be located on the a2 side of the housing 100. In this way, the light-emitting surface of the laser 200 in the optical engine can be arranged parallel to the light-receiving surface of the DMD light valve 300.

[0069] In a specific embodiment, please refer to Figures 3 and 4. Figure 3 is a schematic structural diagram of one side of a housing provided in an embodiment of the present application, and Figure 4 is a schematic structural diagram of the other side of a housing provided in an embodiment of the present application. The first accommodating cavity 101a in the housing 100 may have a first assembly opening k1, and the second accommodating cavity 101b in the housing 100 may have a second assembly opening k2. The first assembly opening k1 and the second assembly opening k2 may be located on opposite sides of the housing 100, respectively. In the present application, the opening surface of the first assembly opening k1 and the second mounting hole 103 in the housing 100 may be located on the same side of the housing 100, and the second assembly opening k2 may be located on the same side of the housing 100 as the opening surface of the first mounting hole 102. In the present application, the opening surface of the first assembly opening k1 and the second mounting hole 103 in the housing 100 may be located on the a2 side of the housing 100, and the opening surface of the second assembly opening k2 and the first mounting hole 102 may be located on the a1 side of the housing 100.

[0070] For a second optional implementation, please refer to Figures 5 and 6. Figure 5 is a schematic structural diagram of one side of another housing provided in an embodiment of the present application, and Figure 6 is a schematic structural diagram of the other side of another housing provided in an embodiment of the present application. The opening surface of the first mounting hole 102 in the housing 100 intersects with the opening surface of the second mounting hole 103. In this case, the laser beam emitted by the laser 200 disposed at the first mounting hole 102 can be guided to the DMD light valve 300 disposed at the second mounting hole 103 through the optical path component 400 disposed in the housing 100. In the present application, the opening surface of the first mounting hole 102 in the housing 100 can be arranged perpendicular to the opening surface of the second mounting hole 103.

[0071] In a specific embodiment, please refer to Figures 5, 6, 7, and 8. Figure 7 is a top view of another housing provided in an embodiment of the present application, and Figure 8 is a schematic diagram of the connection between a laser and a DMD provided in an embodiment of the present application and the housing. The first accommodating cavity 101a in the housing 100 can have a first assembly opening k1, and the second accommodating cavity 101b in the housing 100 can have a second assembly opening k2. The first assembly opening k1 and the second assembly opening k2 can be located on the same side of the housing 100. The first assembly opening k1 and the first mounting hole 102 in the housing 100 can be respectively located on two adjacent sides of the housing 100, and the second assembly opening k2 and the second mounting hole 103 in the housing 100 can be respectively located on opposite sides of the housing 100. In this application, the second assembly opening k2 can be located on the m1 side of the housing 100, and the opening of the second mounting hole 103 can be located on the m2 side of the housing, with the m1 side and the m2 side being opposite sides of the housing. The first assembly opening k1 can be provided on the m3 side of the housing 100, and the first mounting hole 102 can be provided on the m4 side of the housing. The m3 side and the m4 side are two adjacent side surfaces of the housing 100 (for example, the m3 side and the m4 side can be two perpendicular sides). In the present application, as shown in FIG7 , the opening surface of the first mounting hole 102 in the housing 100 can be located in the plane XY, and the opening surface of the second mounting hole 103 in the housing 100 can be located in the plane YZ.

[0072] Regarding a third alternative implementation, please refer to Figures 9 and 10. Figure 9 is a schematic structural diagram of another housing provided in an embodiment of the present application from one perspective, and Figure 10 is a schematic structural diagram of another housing provided in an embodiment of the present application from the other side. The first mounting hole 102 and the second mounting hole 103 in the housing 100 can be located on the same side of the housing 100. In this case, the laser beam emitted by the laser 200 located in the first mounting hole 102 is directed through the optical path assembly 400 to the DMD light valve 300 located in the second mounting hole 103. In this application, the opening surface of the first mounting hole 102 can be flush with the opening surface of the second mounting hole 103. Thus, after the laser 200 is secured in the first mounting hole 102 and the DMD light valve 300 is secured in the second mounting hole 103, the laser 200 and the DMD light valve 300 can be located on the same side of the housing 100. Furthermore, the light-emitting surface of the laser 200 can be arranged parallel to the light-receiving surface of the DMD light valve 300.

[0073] In a specific embodiment, please refer to Figure 11, which is a schematic structural diagram of another housing provided in an embodiment of the present application. The first accommodating cavity 101a in the housing 100 may have a first assembly opening k1, and the second accommodating cavity 101b in the housing 100 may have a second assembly opening k2. The first assembly opening k1 and the second assembly opening k2 may be located on the same side of the housing 100. The first assembly opening k1 in the housing 100 and the first mounting hole 102 in the housing 100 may be located on opposite sides of the housing 100, and the second assembly opening k2 in the housing 100 and the second mounting hole 103 in the housing 100 may be located on opposite sides of the housing 100.

[0074] In this application, please refer to Figures 12 and 13. Figure 12 is a structural schematic diagram of one side of another optical engine provided by an embodiment of the present application, and Figure 13 is a structural schematic diagram of the other side of another optical engine provided by an embodiment of the present application. The optical engine 000 may also include: a first sealing cover 500 and a second sealing cover 600. The first sealing cover 500 can be connected to the housing 100 at the first assembly opening k1 in the housing 100, and the second sealing cover 600 can be connected to the housing 100 at the second assembly opening k2 in the housing 100. In this application, as shown in Figures 12 and 13, the housing in the first implementation is used as an example for schematic description. The first sealing cover 500 and the second sealing cover 600 can be arranged opposite to each other. The first sealing cover 500 can be used to seal the first assembly opening (i.e., the opening surface of the first accommodating cavity 101a), and the second sealing cover 600 can be used to seal the second assembly opening (i.e., the opening surface of the second accommodating cavity 101b). In this way, the use of the first sealing cover 500 and the second sealing cover 600 can provide a certain degree of protection for the optical components inside the housing 100.

[0075] In the present application, as shown in Figures 3 and 4 , the housing 100 of the optical engine 000 may include: a first housing A1 and a second housing A2 arranged side by side. The first housing A1 may have a first mounting hole 102 and a first receiving cavity 101a that are interconnected; the second housing A2 may have a second mounting hole 103 and a second receiving cavity 101b that are interconnected. For example, the first housing A1 and the second housing A2 may be independent structures that are assembled into the housing through a fixed connection; alternatively, the first housing A1 and the second housing A2 may be an integrated structure, which is not specifically limited in this embodiment of the present application.

[0076] In a specific embodiment, as shown in FIG3 , the housing 100 in the optical engine 000 may have a third mounting hole 104 for connecting the first accommodating cavity 101a and the second accommodating cavity 101b of the housing 100. The optical path assembly 400 in the optical engine 000 may include a light homogenizing assembly 401 fixed within the third mounting hole 104 (the light homogenizing assembly is shown in subsequent figures). Thus, when the light homogenizing assembly 401 is installed through the third mounting hole 104, the first accommodating cavity 101a and the second accommodating cavity 101b are connected, allowing the laser beam emitted by the laser 200 to be guided into the DMD light valve 300 via the first accommodating cavity 101a, the third mounting hole 104, and the second accommodating cavity 101b.

[0077] In this application, please refer to Figures 14 and 15. Figure 14 is a front view of an optical engine provided in an embodiment of the present application, and Figure 15 is a rear view of an optical engine provided in an embodiment of the present application. The optical path component 400 in the optical engine 000 may also include: a light combining lens group 402 and a first reflector 403 fixed in the first accommodating cavity 101a in the housing 100. The light combining lens group 402 can be located on one side of the light emitting surface of the laser 200. The light combining lens group 402 can be used to combine the laser beams emitted by the laser 200 and direct them to the first reflector 403. The first reflector 403 can be used to direct the combined laser beams to the light homogenizing component 401, and the light homogenizing component 401 can be used to homogenize the combined laser beams. In the present application, as shown in FIG15 , the optical path component 400 in the optical engine 000 may further include: a second reflector 404 and a prism group 405 fixed in the second accommodating cavity 101 b , wherein the second reflector 404 may be used to direct the laser beam homogenized by the homogenizing component 401 to the prism group 405 , and the prism group 405 may be used to direct the laser beam reflected by the second reflector 404 to the light-receiving surface of the DMD light valve 300 .

[0078] It should be noted that the arrangements of the lasers and DMD light valves in the three different implementations described above differ, resulting in certain differences in the arrangement of the optical components in the optical path assembly. In the first implementation, as shown in Figures 14 and 15 , the arrangement direction of the laser 200 and the light-combining lens assembly 402 in the optical engine 000 can be perpendicular to the arrangement direction of the light-combining lens assembly 402 and the first reflector 403; the arrangement direction of the prism assembly 405 and the second reflector 404 can be parallel to the arrangement direction of the light-combining lens assembly 402 and the first reflector 403; and the arrangement direction of the first reflector 403, the light homogenizing assembly 401, and the second reflector 404 can be perpendicular to the arrangement direction of the light-combining lens assembly 402 and the first reflector 403.

[0079] In a specific embodiment, the optical path component 400 may also include: a first lens 406 located between the light combining lens group 402 and the first reflector 403, a second lens 407 located between the first reflector 403 and the light homogenizing component 401, a third lens 408 located between the light homogenizing component 401 and the second reflector 404, and a fourth lens 409 located between the second reflector 404 and the prism group 405. Among them, the first lens 406 can be used to converge the combined light beam emitted by the combining mirror group 402, and emit the converged laser beam to the first reflector 403; the second lens 407 can be used to diverge the laser beam reflected by the first reflector 403, and emit the diverged laser beam to the light homogenizing component 401; the third lens 408 can be used to converge the laser beam after homogenization by the light homogenizing component 401, and emit the converged laser beam to the second reflector 404; the fourth lens 409 can be used to converge the laser beam reflected by the second reflector 404, and emit the converged laser beam to the prism group 405, and the prism group 405 finally guides the laser beam to the DMD light valve 300.

[0080] In a second implementation, please refer to Figures 16, 17, and 18. Figure 16 is a schematic diagram of the arrangement of an optical path component in a housing provided in an embodiment of the present application, Figure 17 is a schematic diagram of the arrangement of an optical path component in an optical engine provided in an embodiment of the present application, and Figure 18 is a schematic diagram of the arrangement of the laser and the light-combining mirror assembly in Figure 17. The arrangement direction of the laser 200 and the light-combining mirror assembly 402 in the optical engine can be parallel to the arrangement direction of the light-combining mirror assembly 402 and the first reflector 403; the arrangement direction of the prism assembly 405 and the second reflector 404 can be parallel to the arrangement direction of the laser 200 and the light-combining mirror assembly 402; and the arrangement direction of the first reflector 403, the light homogenizing assembly 401, and the second reflector 404 can be perpendicular to the arrangement direction of the laser 200 and the light-combining mirror assembly 402. Among them, the laser beam emitted by the laser 200 is combined by the light combining mirror group 402 and then emitted to the first reflector 403; the first reflector 403 can be used to reflect the combined laser beam and guide the reflected laser beam to the light homogenizing component 401 for homogenization; and the light homogenizing component 401 guides the homogenized laser beam to the second reflector 404, and the second reflector 404 reflects the laser beam to the prism group 405; the prism group 405 can be used to reflect the laser beam to the DMD light valve 300 for modulation.

[0081] In a specific embodiment, the optical path component 400 in the optical engine 000 may also include: a first lens 406 located between the light combining lens group 402 and the first reflector 403, a second lens 407 located between the first reflector 403 and the light homogenizing component 401, a third lens 408 located between the light homogenizing component 401 and the second reflector 404, and a fourth lens 409 located between the second reflector 404 and the prism group 405. Among them, the first lens 406 can be used to converge the combined light beam emitted by the light combining mirror group 402, and emit the converged laser beam to the first reflector 403; the second lens 407 can be used to diverge the laser beam reflected by the first reflector 403, and emit the diverged laser beam to the light homogenizing component 401; the third lens 408 can be used to converge the laser beam after homogenization by the light homogenizing component 401, and emit the converged laser beam to the second reflector 404; the fourth lens 409 can be used to converge the laser beam reflected by the second reflector 404, and emit the converged laser beam to the prism group 405.

[0082] In a third implementation, please refer to Figure 19, which is a schematic diagram of the arrangement of an optical path component in a housing according to an embodiment of the present application. The arrangement direction of the laser 200 and the light-combining lens assembly 402 in the optical engine 000 can be perpendicular to the arrangement direction of the light-combining lens assembly 402 and the first reflector 403; the arrangement direction of the prism assembly 405 and the second reflector 404 can be parallel to the arrangement direction of the light-combining lens assembly 402 and the first reflector 403; and the arrangement direction of the second reflector 404 and the light homogenizing assembly 401 can be perpendicular to the arrangement direction of the light-combining lens assembly 402 and the first reflector 403.

[0083] In a specific embodiment, the optical path component 400 in the optical engine 000 may also include: a first lens 406 located between the light combining lens group 402 and the first reflector 403, a second lens 407 located between the first reflector 403 and the light homogenizing component 401, a third lens 408 located between the light homogenizing component 401 and the second reflector 404, and a fourth lens 409 located between the second reflector 404 and the prism group 405. Among them, the first lens 406 can be used to converge the combined light beam emitted by the combining mirror group 402, and emit the converged laser beam to the first reflector 403; the second lens 407 is used to diverge the laser beam reflected by the first reflector 403, and emit the diverged laser beam to the light homogenizing component 401; the third lens 408 can be used to converge the laser beam after homogenization by the light homogenizing component 401, and emit the converged laser beam to the second reflector 404; the fourth lens 409 can be used to converge the laser beam reflected by the second reflector 404, and emit the converged laser beam to the prism group 405, and the prism group 405 finally guides the laser beam to the DMD light valve 300.

[0084] In a specific embodiment, please refer to Figures 14 and 20. Figure 20 is a schematic structural diagram of another optical engine provided in an embodiment of the present application. The housing 100 in the optical engine 000 may also have: a first supporting platform 105 fixed in the first accommodating cavity 101a of the housing 100, and the first supporting platform 105 may be distributed on both sides of the first mounting hole 102 in the housing 100. The first supporting platform 105 may have a plurality of limiting grooves 1051 arranged in parallel, each limiting groove 1051 can be connected to the first mounting hole 102 in the housing 100, and the supporting surfaces of each limiting groove 1051 are arranged in parallel. The light combining lens group 402 in the optical path component 400 may include: a plurality of light combining lenses 402a corresponding one-to-one to the limiting grooves 1051 on the plurality of first supporting platforms 105, and each light combining lens 402a can be fitted with the supporting surface of the corresponding limiting groove 1051. In this case, by providing a first support platform 105 on both sides of the first mounting hole 102 in the housing 100, and providing a plurality of side-by-side limiting grooves 1051 in the first support platform 105, each light-combining lens 402a can be installed in the corresponding limiting groove 1051. The limiting groove 1051 can provide good support for the light-combining lens 402a and ensure the installation position of the light-combining lens 402a. In the present application, the plurality of light-combining lenses 402a can include: a first light-combining lens b1, a second light-combining lens b2, and a third light-combining lens b3; correspondingly, the plurality of limiting grooves 1051 can include: a first limiting groove c1 corresponding to the first light-combining lens b1, a second limiting groove c2 corresponding to the second light-combining lens b2, and a third limiting groove c3 corresponding to the third light-combining lens b3.

[0085] In the present application, the first light-combining lens b1, the second light-combining lens b2, and the third light-combining lens b3 in the light-combining lens group 402 can be arranged in sequence. When the optical engine is operating, the laser 200 can emit a green laser to the third light-combining lens b3, and the third light-combining lens b3 is used to reflect the green laser toward the first light-combining lens b1; the laser 200 can also emit a blue laser to the second light-combining lens b2, and the second light-combining lens b2 can be used to reflect the blue laser toward the first light-combining lens b1; the laser 200 can also emit a red laser to the first light-combining lens b1, and the three-color laser light can be combined at the first light-combining lens b1, and the first light-combining lens b1 can guide the combined laser beam to the subsequent optical path.

[0086] In the present application, please refer to Figures 20 and 21. Figure 21 is a schematic diagram of the structure of another optical engine provided in an embodiment of the present application. The first supporting platform 105 in the housing 100 may also have: a plurality of glue dispensing grooves 1052 corresponding one to one with the plurality of limiting grooves 1051, each glue dispensing groove 1052 may be connected to the corresponding limiting groove 1051, and the limiting groove 1051 may be closer to the first mounting hole 102 in the housing 100 relative to the glue dispensing groove 1052. Among them, the glue dispensing groove 1052 in the first supporting platform 105 can be used to accommodate glue after the corresponding limiting groove 1051 supports the light-combining lens 402a, so as to adhere the light-combining lens 402a to the supporting surface of the limiting groove 1051 through the glue dispensing. That is, in the present application, the light-combining lens in the light-combining lens group can be fixed by glue dispensing.

[0087] In a specific embodiment, please refer to Figures 20, 22, 23, and 24. Figure 22 is an exploded view of a portion of the structure of an optical engine provided in an embodiment of the present application. Figure 23 is an assembly diagram of the optical engine shown in Figure 22. Figure 24 is a structural diagram of a first spring clip provided in an embodiment of the present application. The optical engine 000 may further include a first spring clip 700, which can be used to simultaneously secure each light-combining lens in the light-combining lens assembly 402 within a corresponding retaining groove 1051. In this case, by using the first spring clip 700 to simultaneously secure multiple light-combining lenses in the light-combining lens assembly 402 within the multiple retaining grooves 1051 of the first support 105, the number of fixing structures used to secure each light-combining lens 402a is reduced, ensuring the relative position accuracy of the multiple light-combining lenses 402a in the light-combining lens assembly 402. It should be noted that in this application, the light-combining lenses in the light-combining lens assembly can be secured using spring clips and / or glue.

[0088] In the present application, as shown in FIG23 , the first spring piece 700 in the optical engine 000 may include: a first fixing piece 701 and multiple groups of first pressing parts 702. The first fixing piece 701 may be fixed in the first accommodating cavity 101a in the housing 100, and the first fixing piece 701 may have a first hollow hole d1 connected to the first mounting hole 102 in the housing 100. The multiple groups of first pressing parts 702 in the first spring piece 700 may correspond one-to-one to the multiple light-combining lenses 402a. Each group of first pressing parts 702 may include: two first pressing parts fixedly connected to the inner wall of the first hollow hole d1, and the two first pressing parts in each group of first pressing parts 702 may respectively abut against the two ends of the corresponding light-combining lens 402a. In this case, the first fixing piece 701 in the first elastic piece 700 is fixedly connected to the bottom of the first accommodating cavity 101a of the shell 100, and the first fixing piece 701 is provided with a first hollow hole d1 to facilitate the connection of multiple groups of first pressing parts 702 to the first fixing piece 701. Here, after the first pressing part 702 abuts against the light-combining lens 402a, the first hollow hole d1 can provide a certain elastic deformation space for the first pressing part 702. In the present application, the first pressing part 702 in the first elastic piece 700 can be a bending structure. In the present application, as shown in Figures 22 and 24, the multiple light-combining lenses 402a can include: a first light-combining lens b1, a second light-combining lens b2 and a third light-combining lens b3; the multiple groups of first pressing parts 602 can be corresponding three groups, namely the first pressing part e1, the first pressing part e2 and the first pressing part e3.

[0089] In the present application, the first fixing plate 701 may include four sub-fixing plates (not shown in the figure) connected end to end, and the four sub-fixing plates may form an annular structure B. In the present application, the four corners of the annular structure may have fixing holes (not shown in the figure), and the inner wall of the first accommodating cavity 101a in the housing 100 may have a fixing post (not shown in the figure) corresponding to each fixing hole. The annular structure may be connected to the fixing posts on the inner wall of the first accommodating cavity by screws (not shown in the figure) passing through the fixing holes to fix the annular structure.

[0090] In a specific embodiment, as shown in FIG23 , the multiple light-combining lenses in the light-combining lens assembly may include: a first light-combining lens and at least one second light-combining lens. The first light-combining lens may be the lens located outermost in the light-combining lens assembly 402 in the direction of light transmission, and the at least one second light-combining lens may be a lens in the light-combining lens assembly 402 other than the first light-combining lens. The first spring 700 may further include: a first stopper 703 corresponding to the first light-combining lens, and at least one second stopper 704 corresponding one-to-one with the at least one second light-combining lens. The first stopper 703 in the first spring 700 may be used to stop the first light-combining lens within the corresponding stopper slot 1051, and each second stopper 704 may be used to stop the corresponding second light-combining lens within the corresponding stopper slot 1051. In this case, by providing the first stopper 703 corresponding to the first light-combining lens in the first spring 700, at least one second stopper 704 corresponding one-to-one with the at least one second light-combining lens is provided. The first limiting portion 703 can limit the first light-combining lens within the corresponding limiting groove 1051, preventing the first light-combining lens from falling out of the corresponding limiting groove; the second limiting portion 704 can limit the corresponding second light-combining lens within the corresponding limiting groove 1051, preventing the second light-combining lens from falling out of the corresponding limiting groove. In this application, the first light-combining lens can be the first light-combining lens b1 in the light-combining lens set 402, and the at least one second light-combining lens can include: two second light-combining lenses (i.e., the second light-combining lens b2 and the third light-combining lens b3 in the light-combining lens set 402).

[0091] In the present application, as shown in FIG24 , the first limiting portion 703 in the first elastic piece 700 may include: a first limiting piece D1 fixedly connected to the outer side wall of the first fixing piece 701, and a second limiting piece D2 fixedly connected to the side of the first limiting piece D1 facing away from the first fixing piece 701. The surface of the first limiting piece D1 intersects with the surface of the first fixing piece 701 and intersects with the surface of the second limiting piece D2. The second limiting piece D2 can be used to contact one side of the first light-combining lens b1. In this case, by providing the first limiting piece D1 fixedly connected to the outer side wall of the first fixing piece 701 and the second limiting piece D2 connected to the side of the first limiting piece D1 facing away from the first fixing piece 701 in the first limiting portion 703, and the first limiting piece D1 intersects with the second limiting piece D2. In this way, the second limiting piece D2 can limit the first light-combining lens b1 in the corresponding limiting groove 1051, ensuring the installation reliability of the first light-combining lens b1. In the present application, the first limiting piece D1 and the second limiting piece D2 may be an integral structure and may form a bent structure to ensure that they have good elastic deformation.

[0092] In the present application, as shown in FIG24 , each second limiting portion 704 in the first elastic piece 700 may include: two third limiting pieces D3 arranged opposite to each other, and both third limiting pieces D3 may be fixedly connected to the inner wall of the first hollow hole d1 of the first fixing piece 701. The surface where the third limiting piece D3 is located may be flush with the surface where the first fixing piece 701 is located, and the third limiting piece D3 covers at least a portion of the corresponding limiting groove 1051. The two third limiting pieces D3 in each second limiting portion 704 can be used to contact one side of the corresponding second light-combining lens. In this case, by providing two opposite third limiting pieces D3 in each second limiting portion 704, and the third limiting piece D3 is fixedly connected to the inner wall of the first hollow hole d1, and at least a portion of the corresponding limiting groove 1051 is covered by the third limiting piece D3. In this way, a second light-combining lens can be limited in the corresponding limiting groove by two third limiting pieces D3 arranged opposite to each other (for example, the second light-combining lens can be limited in the second limiting groove by two third limiting pieces arranged opposite to each other, and the third light-combining lens can be limited in the third limiting groove by two third limiting pieces arranged opposite to each other), thereby ensuring the installation reliability of the second light-combining lens. In the present application, a second limiting portion 704 may include: two third limiting pieces D31 arranged opposite to each other; another second limiting portion may include: two third limiting pieces D32 arranged opposite to each other. The first pressing portion e1 may be fixedly connected to the side of the two third limiting pieces D31 facing away from the first fixing piece 701, and the first pressing portion e2 may be fixedly connected to the side of the two third limiting pieces D32 facing away from the first fixing piece 701.

[0093] In a specific embodiment, please refer to Figures 25 and 26. Figure 25 is an exploded schematic diagram of a partial structure of another optical engine provided by an embodiment of the present application, and Figure 26 is a schematic diagram of the assembly of the optical engine shown in Figure 25. The optical path assembly 400 may further include: a first lens 406 and a second lens 407 located on the light-emitting side of the light-combining lens assembly 402. The first reflector 403 may be located between the first lens 406 and the second lens 407. The optical engine 000 may include: a second spring 800, which can be used to simultaneously secure the first lens 406 and the second lens 407 within the first accommodating cavity 101a of the housing 100. This reduces the number of fixing structures used to secure the lenses, ensuring the relative position accuracy of the first lens 406 and the second lens 407 in the optical path assembly 400. In this application, the second spring 800 may include: a second fixing plate 801 and a third fixing plate 802 fixedly connected, as well as at least one second pressing portion 803 and at least one third pressing portion 804. The second fixing plate 801 is fixed within the first accommodating cavity 101a of the housing 100 and has a second hollow hole d2. At least one second pressing portion 803 is fixedly connected to the inner wall of the second hollow hole d2, and the second pressing portion 803 is used to abut the side of the edge portion of the first lens 406. The third fixing plate 802 is fixed within the first accommodating cavity 101a of the housing 100 and has a third hollow hole d3. At least one third pressing portion 804 is fixedly connected to the inner wall of the third hollow hole d3, and the third pressing portion 804 abuts the side of the edge portion of the second lens 407. The length extension direction of the second fixing plate 801 intersects the length extension direction of the third fixing plate 802. In the present application, the length extension direction of the second fixing plate 801 and the length extension direction of the third fixing plate 802 can be perpendicular. It should be noted that the length extension direction of the second fixing plate 801 and the extension direction of the third fixing plate 802 can be set according to the arrangement direction of the first lens 406 and the second lens 407, and this embodiment of the application does not make any specific limitation on this.

[0094] In a specific embodiment, please refer to Figure 27, which is a schematic diagram of the layout structure at point A in Figure 25. The housing 100 in the optical engine 000 may further include: a first fixing platform 106 and a second fixing platform 107 fixed within the first accommodating cavity 101a. The first fixing platform 106 may have a first fixing groove 106a for mounting the first lens 406; the second fixing platform 107 may have a second fixing groove 107a for mounting the second lens 407. The second spring 800 may be fixedly connected to both the first fixing platform 106 and the second fixing platform 107. The second hollow hole d2 may communicate with the first fixing groove 106a, and the third hollow hole d3 may communicate with the second fixing groove 107a. In this application, the first fixing platform 106 may further include second glue dispensing grooves 106b located on both sides of the first fixing groove 106a. These second glue dispensing grooves 106b may be used to accommodate glue, thereby securing the first lens 406 within the first fixing groove 106a. The second fixing platform 107 may further include third glue dispensing grooves 107b located on both sides of the second fixing groove 107a. The third glue dispensing grooves 107b may be used to receive glue to fix the second lens 407 to the second fixing groove 107a. In other words, the first lens 406 and the second lens 407 may be fixed by using spring clips and / or glue.

[0095] In the present application, as shown in Figures 15, 16 and 19, the optical path component 400 in the optical engine 000 may also include: a second reflector 404 and a prism group 405 fixed in the second accommodating cavity 101b in the shell 100, the second reflector 404 can be used to guide the homogenized laser beam to the prism group 405, and the prism group 405 can be used to guide the laser beam reflected by the second reflector 404 to the light-receiving surface of the DMD light valve 300.

[0096] In a specific embodiment, please refer to Figures 14, 16, 19, and 28. Figure 28 is an exploded schematic diagram of a partial structure of another optical engine provided in an embodiment of the present application. The optical path assembly 400 may further include: a third lens 408 and a fourth lens 409 located in the second accommodating cavity 101b of the housing 100. The third lens 408 may be located between the light homogenizing assembly 401 and the second reflector 404, and the fourth lens 409 may be located between the second reflector 404 and the prism assembly 405. The optical engine 000 may further include: a third spring 900, which may be used to simultaneously secure the third lens 408 and the fourth lens 409 within the second accommodating cavity 101b of the housing 100. It should be noted that when the light homogenizing assembly 401 in the optical path assembly 400 includes a fly-eye lens, the third spring 900 in the optical engine 000 may also be used to simultaneously secure the fly-eye lens and the third lens 408 within the housing 100. Here, the light-distributing assembly 401 and the third lens 408 in the optical path assembly 400 are simultaneously fixed within the housing 100 by using a third spring 900. This reduces the number of fixed structures and ensures the relative position accuracy of the light-distributing assembly 401 and the third lens 408 in the optical path assembly 400. In this application, please refer to Figures 29 and 30. Figure 29 is an exploded schematic diagram of a partial structure of another optical engine provided by this application, and Figure 30 is an assembled schematic diagram of the optical engine shown in Figure 29. The third spring 900 may include: a fourth fixing plate 901 and a fifth fixing plate 902 fixedly connected, as well as at least one fourth pressing portion 903 and at least one fifth pressing portion 904. The fourth fixing plate 901 is fixed within the housing 100 and has a fourth hollow hole d4. At least one fourth pressing portion 903 is fixedly connected to the inner wall of the fourth hollow hole d4, and the fourth pressing portion 903 abuts the side of the edge portion of the fly-eye lens. The fifth fixing plate 902 can be fixed within the housing 100 and has a fifth hollow hole d5. At least one fifth pressing portion 904 can be fixedly connected to the inner wall of the fifth hollow hole d5, and the fifth pressing portion 904 can abut against the side of the edge portion of the third lens 408. The length extension direction of the fourth fixing plate 901 and the length extension direction of the fifth fixing plate 902 can be parallel. It should be noted that the length extension direction of the fourth fixing plate 901 and the length extension direction of the fifth fixing plate 902 can be set according to the arrangement direction of the fly-eye lens and the third lens 408, and this embodiment of the application does not specifically limit this.

[0097] In this application, please refer to Figure 31, which is a partially enlarged schematic diagram of point B in Figure 29. The housing 100 in the optical engine 000 may also have a third fixing platform 108 and a fourth fixing platform 109 fixed within the housing 100. The third fixing platform 108 may have a third fixing groove 108a for mounting a fly-eye lens; the fourth fixing platform 109 may have a fourth fixing groove 109a for mounting a third lens 408. The third spring piece 900 may be fixedly connected to both the third fixing platform 108 and the fourth fixing platform 109. The fourth hollow hole d4 may communicate with the third fixing groove 108a, and the fifth hollow hole d5 may communicate with the fourth fixing groove 109a. In this application, the third fixing platform 108 may also have fourth glue dispensing grooves 108b located on both sides of the third fixing groove 108a. These fourth glue dispensing grooves 108b may be used to accommodate glue, thereby securing the fly-eye lens within the third fixing groove 108a. The fourth fixing platform 109 may further include fifth glue dispensing grooves 109b located on both sides of the fourth fixing groove 109a. The fifth glue dispensing grooves 109b may be used to receive glue to secure the third lens 408 to the fourth fixing groove 109a. In other words, the fly-eye lens and the third lens 408 may be secured by using spring clips and / or glue.

[0098] In a specific embodiment, please refer to Figures 32 and 33. Figure 32 is a structural schematic diagram of one side of an optical engine provided by another embodiment of the present application, and Figure 33 is a structural schematic diagram of the other side of an optical engine provided by another embodiment of the present application. The optical engine 000 may also include: two second carriers, and multiple adjustment components connected to each second carrier. The two second carriers 1000 can be located in the first accommodating cavity 101a and the second accommodating cavity 101b in the housing 100, respectively, and can be used to respectively support the first reflector 403 and the second reflector 404 in the optical path assembly 400. Each second carrier can have multiple adjustment holes (not shown in the figure) corresponding to the multiple adjustment components. The multiple adjustment components can be used to connect to the reflector through the multiple adjustment holes in the corresponding second carrier after the corresponding second carrier carries the corresponding reflector, and each adjustment component can move within the corresponding adjustment hole. In the present application, the two second carriers can include: a second carrier 1000a for supporting the first reflector 403, and a second carrier 1000b for supporting the second reflector 404. The second carrying platform 1000a may be located within the first accommodating cavity 101a, and the second carrying platform 1000a may have a plurality of first adjustment holes corresponding one-to-one with the plurality of adjustment components 1100. The second carrying platform 1000b may be located within the second accommodating cavity 101b, and the second carrying platform 1000b may have a plurality of second adjustment holes corresponding one-to-one with the plurality of adjustment components 1100. Furthermore, the plurality of adjustment components 1100 connected to the second carrying platform 1000a may be the first adjustment components 1100a, and the plurality of adjustment components 1100 connected to the second carrying platform 1000b may be the second adjustment components 1100b.

[0099] In the present application, after the second carrier 1000a carries the first reflector 403, multiple first adjustment components 1100a can be connected to the first reflector 403 through multiple first adjustment holes. When each first adjustment component 1100a moves in the corresponding first adjustment hole, it can drive the second carrier 1000a to move, so that the second carrier 1000a can drive the first reflector 403 to move, so as to adjust the position of the spot of the laser beam reflected by the first reflector 403. After the second carrier 1000b carries the second reflector 404, multiple second adjustment components 1100b can be connected to the second reflector 404 through multiple second adjustment holes. When each second adjustment component 1100b moves in the corresponding second adjustment hole, it can drive the second carrier 1000b to move, so that the second carrier 1000b can drive the second reflector 404 to move, so as to adjust the position of the spot of the laser beam reflected by the second reflector 404.

[0100] In a specific embodiment, please refer to Figures 32 and 34. Figure 34 is a schematic diagram of a connection between a second carrier and a first adjustment assembly provided in an embodiment of the present application. The second carrier 1000a may include: a second carrier body B1 and a plurality of first elastic elements B2. The first reflector 403 may be fixedly connected to the second carrier body B1. The second carrier body B1 may have a plurality of first connecting posts B11 on a side facing away from the first reflector 403. The plurality of first connecting posts B11 correspond one-to-one with the plurality of first elastic elements B2, and each first connecting post B11 may have a first adjustment hole g1. Each first elastic element B2 is sleeved on a corresponding first connecting post B11 and abuts against the second carrier body B1 and the inner sidewall of the first accommodating cavity 101a, respectively. The inner sidewall of the first accommodating cavity 101a may have a through hole h1 that communicates with the first adjustment hole g1. In the present application, the first adjustment hole g1 in the first connecting column B11 can be a threaded hole, the first adjustment component 1100a can be a screw, and the first adjustment component 1100a can pass through the through hole h1 to engage with the first adjustment hole g1. When the two adjacent first adjustment components 1100a are rotated, the second supporting platform body B1 can be driven to rotate in one direction to drive the first reflector 403 to rotate. It should be noted that the structure and working principle of the second supporting platform 1000b and the second adjustment component 1100b are the same as the structure and working principle of the second supporting platform 1000a and the first adjustment component 1100a, and no further details will be given here. It should also be noted that in order to clearly see the structural form of the second supporting platform and the first adjustment component, only one first elastic element is shown in the figure.

[0101] In this application, please refer to Figures 15, 35, and 36. Figure 35 is an exploded schematic diagram of a portion of the structure of an optical engine provided in another embodiment of this application, and Figure 36 is a schematic diagram of the assembly of the optical engine shown in Figure 35. The optical engine 000 may also include two fourth spring clips 1200 disposed opposite each other. These two fourth spring clips 1200 can be used to secure the prism assembly 405 within the second accommodating cavity 101b in the housing 100. In this application, please refer to Figure 37, which is a schematic diagram of the structure of a fourth spring clip provided in an embodiment of this application. Each fourth spring clip 1200 may include a first auxiliary spring clip 1201, a second auxiliary spring clip 1202, and a third auxiliary spring clip 1203. The first auxiliary spring clip 1201 is fixed to the inner wall of the second accommodating cavity 101b in the housing 100, and the second auxiliary spring clip 1202 is connected to the first auxiliary spring clip 1201 and the third auxiliary spring clip 1203, respectively. Furthermore, the first auxiliary elastic piece 1201 , the second auxiliary elastic piece 1202 and the third auxiliary elastic piece 1203 may form a bent structure.

[0102] In one specific embodiment, when a spring is used to simultaneously secure the fly-eye lens and the third lens 406 in the light-homogenizing assembly within the housing 100, please refer to Figures 38 and 39. Figure 38 is an exploded view of a portion of the structure of another optical engine provided in another embodiment of the present application, and Figure 39 is an assembled view of the optical engine shown in Figure 38. The optical engine 000 may also include a fifth spring 1300, which can also be used to secure the fourth lens 409 within the second accommodating cavity 101b within the housing 100. In the present application, the fifth spring 1300 may include a sixth fixing plate 1301 and a sixth pressing portion 1302. The sixth fixing plate 801 may have a sixth hollow hole d6, and the sixth pressing portion 802 may be fixedly connected to the inner wall of the sixth hollow hole d6. The sixth pressing portion 802 may abut against the fourth lens 409 to secure the fourth lens 409 within the housing 100.

[0103] In this application, please refer to Figures 38 and 40. Figure 40 is a partially enlarged schematic diagram of Figure 38 at point C. The housing 100 in the optical engine 000 may also have: a fifth fixing platform 110 fixed within the housing 100. The fifth fixing platform 110 may have a fifth fixing groove 110a for mounting the fourth lens 409. The fifth spring 1300 may be fixedly connected to the fifth fixing platform 110. The sixth hollow hole d6 in the sixth fixing plate 801 may be connected to the fifth fixing groove 110a. In this application, the fifth fixing platform 110 may also have sixth glue dispensing grooves 110b located on both sides of the fifth fixing groove 110a. The sixth glue dispensing grooves 110b may be used to accommodate glue to fix the fourth lens 409 in the fifth fixing groove 110a through the glue. That is, the fourth lens 409 can be fixed by using springs and / or glue.

[0104] It should be noted that the structures of the spring piece, the first supporting platform, the second supporting platform and the adjustment component in the above three optional implementation methods are the same, and the above embodiments are schematically described by taking the first optional implementation method as an example.

[0105] In summary, embodiments of the present application provide an optical engine that may include: a housing, a laser, a DMD light valve, and an optical path assembly. A first mounting hole and a second mounting hole are provided on the housing of the optical engine, communicating with two accommodating cavities in the housing. The laser is fixed outside the first accommodating cavity in the housing with its light-emitting surface facing the first mounting hole. The DMD light valve is fixed outside the second accommodating cavity in the housing with its light-receiving surface facing the second mounting hole. The laser beam emitted by the laser can sequentially pass through the first mounting hole, the optical path assembly, and the second mounting hole toward the DMD light valve. In other words, the laser, the optical path assembly, and the DMD light valve can be integrated into the same package housing, effectively reducing the size of the optical engine (facilitating the miniaturization of the laser projection device incorporating the optical engine), reducing the manufacturing cost of the optical engine, and improving the relative position accuracy of the packaged optical path. Furthermore, after the optical engine is integrated into the laser projection device, the overall size of the laser projection device can be reduced.

[0106] The embodiment of the present application also provides a laser projection device, which may include: a projection lens (not shown in the figure) and an optical engine 000, which may be any of the optical engines given above. In the present application, the laser beam emitted by the laser in the optical engine is directed to the DMD light valve through the optical path component, and the DMD light valve can be used to modulate the laser beam and then direct it to the projection lens, which can project the incident laser to form a projection image. The projection lens may include multiple lenses (not shown in the figure), and the laser beam emitted from the DMD light valve can be sequentially projected through the multiple lenses in the projection lens to the screen, so as to realize the projection of the laser by the projection lens and realize the display of the projection image.

[0107] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless expressly limited otherwise.

[0108] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. An optical engine, characterized in that: include: A housing, the housing comprising: a first accommodating cavity and a second accommodating cavity arranged side by side and communicating with each other, a first mounting hole communicating with the first accommodating cavity, and a second mounting hole communicating with the second accommodating cavity; A laser, wherein the laser is fixedly connected to the housing outside the first accommodating cavity, and a light-emitting surface of the laser faces the first mounting hole; a digital micromirror device (DMD) light valve, wherein the DMD light valve is fixedly connected to the housing outside the second accommodating cavity, and a light-receiving surface of the DMD light valve faces the second mounting hole; An optical path component, a part of which is located in the first accommodating cavity, and another part of which is located in the second accommodating cavity, and the optical path component is used to guide the laser light beam emitted from the light-emitting surface to the light-receiving surface.

2. The optical engine according to claim 1, characterized in that: The first mounting hole and the second mounting hole are respectively located on two opposite sides of the housing.

3. The optical engine according to claim 2, characterized in that: The first accommodating cavity has a first assembly opening, and the second accommodating cavity has a second assembly opening; the first assembly opening and the second assembly opening are respectively located on two opposite sides of the housing; The first assembly opening and the second mounting hole are located on the same side of the shell; the second assembly opening and the first mounting hole are located on the same side of the shell.

4. The optical engine according to claim 1, characterized in that: An opening surface of the first mounting hole intersects with an opening surface of the second mounting hole.

5. The optical engine according to claim 4, characterized in that: The first accommodating cavity has a first assembly opening, and the second accommodating cavity has a second assembly opening; the first assembly opening and the second assembly opening are located on the same side of the shell; the first assembly opening and the first mounting hole are respectively arranged on two adjacent sides of the shell; the second assembly opening and the second mounting hole are respectively located on two opposite sides of the shell.

6. The optical engine according to claim 1, characterized in that: The first mounting hole and the second mounting hole are located on the same side of the housing.

7. The optical engine according to claim 6, characterized in that: The first accommodating cavity has a first assembly opening, and the second accommodating cavity has a second assembly opening; the first assembly opening and the second assembly opening are located on the same side of the shell; the first assembly opening and the first mounting hole are respectively located on two opposite sides of the shell; the second assembly opening and the second mounting hole are respectively located on two opposite sides of the shell.

8. The optical engine according to claim 3, 5 or 7, characterized in that: The optical engine further includes: a first sealing cover and a second sealing cover, wherein the first sealing cover is connected to the housing at the first assembly opening, and the second sealing cover is connected to the housing at the second assembly opening.

9. The optical engine according to any one of claims 1 to 7, characterized in that: The housing further comprises: a third mounting hole for connecting the first accommodating cavity and the second accommodating cavity, and the optical path component comprises: a light homogenizing component fixed in the third mounting hole.

10. The optical engine according to claim 9, characterized in that: The optical path component also includes: a light combining mirror group and a first reflector fixed in the first accommodating cavity, the light combining mirror group is located on one side of the light emitting surface of the laser, the light combining mirror group is used to combine the laser light beams emitted by the laser and then direct them to the first reflector, the first reflector is used to guide the combined laser light beams to the light homogenizing component, and the light homogenizing component is used to homogenize the combined laser light beams.

11. The optical engine according to claim 10, characterized in that: The housing further comprises: a first bearing platform fixed in the first accommodating cavity, the first bearing platform being distributed on both sides of the first mounting hole, the first bearing platform having a plurality of limit grooves arranged in parallel, each of the limit grooves being connected to the first mounting hole, and the bearing surfaces of each of the limit grooves being arranged in parallel; The light-combining lens group includes: a plurality of light-combining lenses corresponding one-to-one to the plurality of limiting grooves, and each of the light-combining lenses is fitted with a bearing surface of the corresponding limiting groove.

12. The optical engine according to claim 11, characterized in that: The first supporting platform also has a plurality of glue dispensing grooves corresponding one by one to the plurality of limiting grooves, each of the glue dispensing grooves is connected to the corresponding limiting groove, and the limiting groove is closer to the first mounting hole than the glue dispensing groove, and the glue dispensing groove is used to accommodate the glue after the light-combining lens is carried on the bearing surface of the corresponding limiting groove, so as to bond the light-combining lens to the bearing surface of the limiting groove through the glue dispensing.

13. The optical engine according to claim 11, characterized in that: The optical engine further includes: a first spring piece, which is used to simultaneously fix each light-combining lens in the light-combining lens group in a corresponding limiting groove.

14. The optical engine according to claim 13, characterized in that: The first elastic sheet includes: a first fixing sheet and a plurality of groups of first pressing parts; The first fixing plate is fixed in the first accommodating cavity, and the first fixing plate has a first hollow hole communicating with the first mounting hole; The multiple groups of first clamping parts correspond one-to-one to the multiple light-combining lenses, and each group of the first clamping parts includes two first clamping parts fixedly connected to the inner wall of the first hollow hole, and the two first clamping parts in each group of the first clamping parts are respectively abutted against the two ends of the corresponding light-combining lens.

15. The optical engine according to any one of claims 10 to 14, characterized in that: The optical path assembly further comprises: a first lens and a second lens located at the light exit side of the light combining lens group, and the first reflector is located between the first lens and the second lens; The optical engine further includes: a second spring piece, and the second spring piece is used to fix the first lens and the second lens in the first accommodating cavity at the same time.

16. The optical engine according to any one of claims 10 to 14, characterized in that: The optical path assembly also includes: a second reflector and a prism group fixed in the second accommodating cavity, the second reflector is used to guide the homogenized laser beam to the prism group, and the prism group is used to guide the laser beam reflected by the second reflector to the DMD light valve.

17. The optical engine according to claim 16, characterized in that: The optical path assembly further includes: a third lens and a fourth lens located in the second accommodating cavity, the third lens being located between the light homogenizing assembly and the second reflector, and the fourth lens being located between the second reflector and the prism group; The optical engine further includes: a third spring piece, and the third spring piece is used to fix the third lens and the fourth lens in the second accommodating cavity at the same time.

18. The optical engine according to claim 16, characterized in that: The optical engine further comprises: two second carriers, and a plurality of adjustment components connected to each of the second carriers; The two second carrying platforms are respectively located in the first accommodating cavity and the second accommodating cavity, and are used to carry the first reflecting mirror and the second reflecting mirror respectively; The second carrying platform has a plurality of adjustment holes corresponding one-to-one to the plurality of adjustment components; Wherein, the multiple adjustment components are used to connect with the reflector through multiple adjustment holes in the corresponding second supporting platform when the corresponding second supporting platform supports the corresponding reflector, and each of the adjustment components can move in the corresponding adjustment hole.

19. The optical engine according to claim 17 or 18, characterized in that: The optical engine further includes: two fourth spring pieces arranged opposite to each other, and the two fourth spring pieces are used to fix the prism group in the second accommodating cavity.

20. A laser projection device, characterized in that: include: An optical engine and a projection lens, wherein the optical engine is the optical engine described in any one of claims 1 to 19.

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