Optical engine and laser projection equipment

Abstract

The utility model discloses an optical engine and laser projection equipment, and belongs to the technical field of display. The optical engine comprises a first shell, a second shell, a laser, a DMD light valve and a light path assembly. The first shell, and one part of the laser and the light path assembly which are arranged in the first accommodating cavity of the first shell are used for forming the light source device. The second shell, the DMD light valve installed in the second containing cavity of the second shell and the other part of the light path assembly are used for forming the light machine device. A part of a second opening, communicated with the second containing cavity, in the second shell is communicated with the first opening of the first shell, and the other part of the second opening is used for installing a projection lens. Therefore, after the optical engine is integrated in the laser projection equipment, the light source device and the projection lens in the laser projection equipment can be mounted on the same plane of the optical engine device, so that the size of the laser projection equipment integrated with the optical engine is effectively reduced.

Description

Technical Field

[0001] The present application relates to the field of projection display technology, and in particular to an optical engine and laser projection equipment. Background Art

[0002] 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 adaptive playback.

[0003] Laser projection equipment typically includes a light source, an optomechanical system, and a projection lens. These two components form an optical engine. The optical components within these components need to be encapsulated in a housing to protect them. The projection lens is typically mounted within the housing.

[0004] However, currently, after the optical elements are encapsulated by a shell, the overall volume of the laser projection device is relatively large. Utility Model Content

[0005] The present application provides an optical engine that can solve the problem of large size of conventional laser projection devices integrated with optical engines. The technical solution is as follows:

[0006] In one aspect, an optical engine is provided, comprising: a first housing, a second housing, a laser, a digital micromirror device (DMD) light valve, and an optical path component;

[0007] The first housing has: a first accommodating cavity, and a first mounting hole and a first opening communicating with the first accommodating cavity, wherein an opening surface of the first mounting hole intersects with a surface where the first opening is located;

[0008] The laser is fixedly connected to the first housing outside the first accommodating cavity, and the light-emitting surface of the laser faces the first mounting hole;

[0009] The second housing has: a second accommodating cavity, a second mounting hole communicating with the second accommodating cavity, and a second opening, wherein an opening surface of the second mounting hole is arranged opposite to the second opening;

[0010] The DMD light valve is fixedly connected to the second housing outside the second accommodating cavity, and the light-receiving surface of the DMD light valve faces the second mounting hole;

[0011] A portion of the optical path component is located in the first accommodating cavity, and another portion is located in the second accommodating cavity, and the optical path component is used to guide the laser beam emitted by the laser to the light receiving surface of the DMD light valve;

[0012] The first shell is connected to the second shell, and the first opening is communicated with a portion of the second opening, and another portion of the second opening is used for assembling a projection lens.

[0013] Optionally, the surface where the first opening is located is parallel to the surface where the second opening is located.

[0014] Optionally, the optical engine further comprises: a sealing plate, the sealing plate being connected to the second housing at the second opening, the sealing plate having a first slot and a second slot communicating with the second accommodating cavity;

[0015] The first shell is connected to the sealing plate at the first slot, and the first opening is communicated with the first slot. The portion of the sealing plate where the second slot is located is used for assembling the projection lens.

[0016] Optionally, the first housing includes: a main body portion and a mounting portion connected to each other; the main body portion has the first accommodating cavity, and the mounting portion has the first mounting hole and first mounting grooves distributed around the first mounting hole;

[0017] The optical path assembly includes: a diffractive optical element, a portion of the diffractive optical element is located in the first mounting groove, and another portion of the diffractive optical element covers a portion of the first mounting hole;

[0018] The diffraction optical element is used to homogenize and shape the laser beam emitted by the laser.

[0019] Optionally, a first support member is provided inside the first accommodating cavity, and the first support member is distributed around the periphery of the first mounting hole;

[0020] The optical path assembly further comprises: a light combining lens group, wherein the light combining lens group is fixed on the first support member;

[0021] The light combining mirror assembly is used to combine the laser beams homogenized and shaped by the diffractive optical element and then direct them to the first opening.

[0022] Optionally, the main body further has a fourth opening communicating with the first accommodating cavity, and the fourth opening is arranged opposite to the opening surface of the first mounting hole;

[0023] The first shell further includes a first sealing cover, which is fixedly connected to the main body at the fourth opening.

[0024] Optionally, the second housing includes: a first portion and a second portion connected to each other, the first portion being connected to the first housing; the first portion having a first sub-cavity, the second portion having the second mounting hole, and a second sub-cavity communicating with the first sub-cavity; the second accommodating cavity includes the first sub-cavity and the second sub-cavity;

[0025] The optical path assembly further includes: a reflective lens located in the first sub-cavity, and a prism group located in the second sub-cavity;

[0026] The reflective lens is used to reflect the laser beam emitted through the first opening to the prism group, and the prism group is used to guide the laser beam reflected by the reflective lens to the DMD light valve.

[0027] Optionally, the first portion further has a third opening communicating with the first sub-cavity, and a surface where the third opening is located intersects with a surface where the second opening is located;

[0028] The second shell further includes a second sealing cover fixedly connected to the first part at the third opening.

[0029] Optionally, a first supporting platform is provided between the first sub-cavity and the second sub-cavity;

[0030] The optical path component further includes a homogenizing lens, which is used to homogenize the laser beam emitted by the reflective lens, and the homogenized laser beam can be directed to the prism group.

[0031] On the other hand, a laser projection device is provided, comprising: a projection lens and an optical engine, wherein the optical engine is any one of the optical engines described above, and the projection lens is fixedly connected to the optical engine.

[0032] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0033] A portion of the second opening in the second housing, which communicates with the second accommodating cavity, communicates with the first opening in the first housing, which communicates with the first accommodating cavity. Another portion of the second opening is used to mount the projection lens. In other words, the first housing and the projection lens are both fixedly connected to the second housing at the second opening. Thus, after the optical engine is integrated into a laser projection device, the light source device and projection lens in the laser projection device can be mounted on the same plane as the optical engine. This effectively reduces the size of the laser projection device incorporating the optical engine and facilitates its miniaturization. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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.

[0035] Figure 1 is a cross-sectional view of an optical engine provided by an embodiment of the present application;

[0036] Figure 2 This is a schematic structural diagram of an optical engine provided by an embodiment of the present application;

[0037] Figure 3 is a structural diagram of another optical engine provided in an embodiment of the present application;

[0038] Figure 4 This is a schematic structural diagram of another optical engine provided in an embodiment of the present application;

[0039] Figure 5 This is a structural diagram of a first shell provided in an embodiment of the present application;

[0040] Figure 6 is a cross-sectional view of another optical engine provided by an embodiment of the present application;

[0041] Figure 7 This is a structural diagram of another first shell provided in an embodiment of the present application;

[0042] Figure 8 is a structural diagram of an optical engine provided by another embodiment of the present application;

[0043] Figure 9 is a structural diagram of another optical engine provided by another embodiment of the present application;

[0044] Figure 10 This is a structural diagram of a second supporting platform and an adjustment assembly provided in an embodiment of the present application;

[0045] Figure 11 is a light path diagram in an optical engine provided by an embodiment of the present application;

[0046] Figure 12 It is a structural schematic diagram of a laser projection device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] 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.

[0048] This embodiment of the application provides an optical engine 000, please refer to Figure 1 、 Figure 2 and Figure 3 , Figure 1 is a cross-sectional view of an optical engine provided in an embodiment of the present application, Figure 2 is a structural diagram of an optical engine provided in an embodiment of the present application, Figure 3 Schematic diagram of another optical engine provided by an embodiment of the present application. The optical engine 000 may include: a first housing 100, a second housing 200, a laser 300, a digital micromirror device (DMD) light valve 400, and an optical path component 500.

[0049] The first housing 100 in the optical engine 000 may include a first accommodating cavity K1, a first mounting hole S1 communicating with the first accommodating cavity K1, and a first opening O1. The opening surface of the first mounting hole S1 in the first housing 100 may intersect with the surface of the first opening O1. For example, the opening surface of the first mounting hole S1 may intersect perpendicularly with the surface of the first opening O1.

[0050] The laser 300 in the optical engine 000 can be fixedly connected to the first housing 100 outside the first housing cavity K1 of the first housing 100, and the light-emitting surface of the laser 300 can face the first mounting hole S1. In other words, the laser beam emitted by the laser 300 can be directed toward the first mounting hole S1 and enter the first housing cavity K1 through the first mounting hole S1.

[0051] The second housing 200 in the optical engine 000 may include a second accommodating cavity K2, a second mounting hole S2 communicating with the second accommodating cavity K2, and a second opening O2. The opening surface of the second mounting hole S2 in the second housing 200 may be disposed opposite the second opening O2. For example, the opening surface of the second mounting hole S2 may be parallel to the surface of the second opening O2.

[0052] The DMD light valve 400 in the optical engine 000 may be fixedly connected to the second housing 200 outside the second accommodating cavity K2 of the second housing 200 , and the light receiving surface of the DMD light valve 400 may face the second mounting hole S2 of the second housing 200 .

[0053] A portion of the optical path assembly 500 (comprising multiple optical components) in the optical engine 000 can be located within the first accommodating cavity K1 of the first housing 100, while another portion can be located within the second accommodating cavity K2 of the second housing 200. Furthermore, the optical path assembly 500 can be used to direct the laser beam emitted by the laser 300 toward the light-receiving surface of the DMD light valve. In this way, the laser beam emitted by the laser 300 can be directed toward the DMD light valve 400 after passing through the first mounting hole S1, the optical path assembly 500, and the second mounting hole S2.

[0054] It should be noted that the first housing 100 and the components mounted within the first accommodating cavity K1 of the first housing 100 (e.g., the laser 300 and a portion of the optical path assembly 500) constitute the light source device of the laser projection device. The second housing 200 and the components mounted within the second accommodating cavity K2 of the second housing 200 (e.g., the DMD light valve and another portion of the optical path assembly 500) constitute the optical-mechanical device of the laser projection device.

[0055] In the present application, the first housing 100 can be connected to the second housing 200, and the first opening O1 of the first housing 100 can communicate with a portion of the second opening O2 of the second housing 200. Another portion of the second opening O2 of the second housing 200 can be used to mount a projection lens. In other words, the first housing 100 and the projection lens are both fixedly connected to the second housing 200 at the second opening O2 of the second housing 200. Thus, after the optical engine 000 is integrated into a laser projection device, the light source device and projection lens in the laser projection device can be mounted on the same plane as the optical engine. This effectively reduces the size of the laser projection device incorporating the optical engine 000 and facilitates the miniaturization of the laser projection device.

[0056] In summary, an embodiment of the present application provides an optical engine, comprising: a first shell, a second shell, a laser, a DMD light valve, and an optical path assembly. A portion of the second opening in the second shell that is connected to the second accommodating cavity is connected to the first opening in the first shell that is connected to the first accommodating cavity, and another portion of the second opening is used to install a projection lens. That is, the first shell and the projection lens are both fixedly connected to the second shell at the second opening of the second shell. In this way, after the optical engine is integrated into the laser projection device, the light source device and the projection lens in the laser projection device can be installed on the same plane of the optical machine device, which effectively reduces the volume of the laser projection device integrated with the optical engine and facilitates the miniaturized design of the laser projection device.

[0057] Optional, such as Figure 2 and Figure 3As shown, the surface of the first opening O1 of the first housing 100 in the optical engine 000 can be parallel to the surface of the second opening O2 of the second housing 200. Thus, in a direction parallel to the surface of the first opening O1 of the first housing 100, and similarly, in a direction parallel to the surface of the second opening O2 of the second housing 200, the extension direction of the first housing 100 can be parallel to the extension direction of the second housing 200. This ensures that the first housing 100 can be directly connected to the second housing 200 at the second opening O2 of the second housing 200. Similarly, the projection lens can be directly connected to the second housing 200 at the second opening O2 of the second housing 200. This facilitates the miniaturization of the laser projection device incorporating the optical engine 000.

[0058] Optional, such as Figure 4 As shown, Figure 4 This is a schematic diagram of the structure of another optical engine provided by an embodiment of the present application. The optical engine 000 may further include a sealing plate 600. The sealing plate 600 in the optical engine 000 may be connected to the second housing 200 at the second opening O2 of the second housing 200. The sealing plate 600 may have a first slot A1 and a second slot A2 that communicate with the second accommodating cavity K2 of the second housing 200.

[0059] The first shell 100 can be connected to the sealing plate 600 at the first slot A1 of the sealing plate 600, and the first opening O1 of the first shell 100 can be connected to the first slot A1 of the sealing plate 600. The portion of the sealing plate 600 distributed at the second slot A2 can be used to mount a projection lens. In other words, both the first shell 100 and the projection lens can be connected to the second shell 200 via the sealing plate 600 disposed at the second opening O2 of the second shell 200. The first slot A1 of the sealing plate 600 connected to the second shell 200 allows the first opening O1 of the first shell 100 to be connected to the second opening O2 of the second shell 200, and the second slot A2 of the sealing plate 600 allows the projection lens to be mounted at the second opening O2 of the second shell 200.

[0060] It should be noted that the outer contour of the orthographic projection of the sealing plate 600 in the optical engine 000 onto the surface of the second opening O2 of the second housing 200 can be similar to the outer contour of the second opening O2 of the second housing 200. Furthermore, after the sealing plate 600 is connected to the second housing 200 at the second opening O2, a portion of the sealing plate 600 can seal the second opening O2. In this way, after the first housing 100 and the projection lens are both connected to the second housing 200 via the sealing plate 600, the sealing plate 600 can ensure the sealing of the first cavity K1 of the first housing 100 and the second cavity K2 of the second housing 200, thereby protecting the optical path assembly 500 located within the first cavity K1 and the second cavity K2, thereby increasing the lifespan of the laser projection device incorporating the optical engine 000.

[0061] Optional, please refer to Figure 5 , Figure 5 This is a structural schematic diagram of a first shell provided in an embodiment of the present application. The first shell 100 in the optical engine 000 may include: a main body portion 101 and a mounting portion 102 connected to each other. The main body portion 101 in the first shell 100 may have a first accommodating cavity K1, and the mounting portion 102 in the first shell 100 may have a first mounting hole S1, and a first mounting groove B1 distributed around the first mounting hole S1. It should be noted that a fifth opening O5 may be provided between the main body portion 101 and the mounting portion 102 connected to each other in the first shell 100, and the first accommodating cavity K1 of the main body portion 101 and the first mounting hole S1 of the mounting portion 102 may be connected through the fifth opening O5. The laser beam emitted by the laser 300 with the light emitting surface facing the first mounting hole S1 can pass through the first mounting hole S1 and then be emitted into the first accommodating cavity K1 through the fifth opening O5.

[0062] Optional, such as Figure 5 and Figure 6 As shown, Figure 6 This is a cross-sectional view of another optical engine provided by an embodiment of the present application. The optical path assembly 500 in the optical engine 000 may include a diffractive optical element 501. A portion of the diffractive optical element 501 may be located within the first mounting slot B1 of the first housing 100, while another portion may cover a portion of the first mounting hole S1. The diffractive optical element 501 is used to homogenize and shape the laser beam emitted by the laser 300.

[0063] It should be noted that the first mounting grooves B1 can be distributed around the periphery of the fifth opening O5, so that after a portion of the diffractive optical element 501 is installed in the first mounting grooves B1, another portion of the diffractive optical element 501 that covers a portion of the first mounting hole S1 can cover the fifth opening O5. In this way, after passing through the first mounting hole S1, the laser beam emitted by the laser 300 can be directed toward the portion of the diffractive optical element 501 that covers the fifth opening O5. This portion of the diffractive optical element 501 that covers the fifth opening O5 can homogenize and shape the laser beam that has passed through the first mounting hole S1. Subsequently, the laser beam, homogenized and shaped by the diffractive optical element 501, can be emitted into the first accommodating cavity K1.

[0064] Thus, in the present application, by arranging the diffraction optical element 501 between the first accommodating cavity K1 and the first mounting hole S1, the laser beam emitted by the laser 300 can be directly homogenized and shaped by the diffraction optical element 501 after passing through the first mounting hole S1, thereby ensuring that the laser beam emitted into the first accommodating cavity K1 is the homogenized and shaped laser beam.

[0065] It should be noted that the mounting portion 102 in the first housing 100 may have at least one positioning post 1021 on a side facing away from the main body 101, and the laser 300 may have at least one positioning hole that corresponds one-to-one with the at least one positioning post 1021 in the mounting portion 102. In this way, the laser 300 can be connected to the mounting portion 102 through the fit between the positioning post 1021 and the positioning hole. This ensures the positional accuracy of the laser 300 on the mounting portion 102, allowing the light-emitting surface of the laser 300 to face the first mounting hole S1, and allowing all laser light emitted by the laser 300 to pass through the first mounting hole S1 and enter the first accommodating cavity K1.

[0066] It should also be noted that the position of the first mounting groove B1 can be designed based on the position of the positioning post 1021 in the mounting portion 102 to ensure that the positional accuracy between the laser 300, which is connected to the mounting portion 102 via the positioning post 1021, and the diffractive optical element 500 partially mounted within the first mounting groove B1 can meet the required level of accuracy. Here, the position of the first mounting groove B1 relative to the positioning post 1021 must ensure that the laser beam emitted by the laser 300 can be directed toward the diffractive optical element 500 after passing through the first mounting hole S1. Furthermore, because the surface of the diffractive optical element 500 has stepped microstructures of varying heights, the position of the first mounting groove B1 relative to the positioning post 1021 must also ensure that the short side of the light-emitting chip in the laser 300 aligns with the long side of the imaging spot of the diffractive optical element 501, ensuring that the diffractive optical element 501 can homogenize and shape the laser beam emitted by the laser 300.

[0067] Optional, please refer to Figure 6 and Figure 7 , Figure 7 : is a structural schematic diagram of another first shell provided in an embodiment of the present application. The interior of the first accommodating cavity K1 of the first shell 100 is provided with a first support member 1011, and the first support member 1011 can be distributed on the periphery of the first mounting hole S1. Here, in a direction perpendicular to the surface where the first opening O1 is located and perpendicular to the opening surface of the first mounting hole S1, first support members 1011 are fixed on the inner walls on both sides of the first accommodating cavity K1 that are oppositely arranged, and the first support member 1011 can have a supporting surface P. The optical path component 500 can also include: a light combining lens group 502, and the light combining lens group 502 in the optical path component 500 can be fixed on the first support member 1011. Among them, the light combining lens group 502 is used to combine the laser beam after homogenization and shaping by the diffraction optical element 501 and then guide it to the first opening O1.

[0068] Here, in a direction perpendicular to the surface of the first opening O1 and perpendicular to the opening surface of the first mounting hole S1, the edge portions of the light-combining lens assembly 502 on both sides can be respectively fixed to two first support members 1011 fixedly connected to the inner walls of the first accommodating cavity K1 on both sides, and the edge portions of the light-combining lens assembly 502 can be fixedly connected to the supporting surfaces P of the first support members 1011. This ensures that the laser beams homogenized and shaped by the diffractive optical element 501 can all be projected onto the light-combining lens assembly 502, so that they are combined by the light-combining lens assembly 502 and then projected toward the first opening O1.

[0069] It should be noted that if Figure 6 and Figure 7 As shown, the interior of the first accommodating cavity K1 of the first shell 100 further includes a second support member 1012, which is distributed between the first support member 1011 and the first opening O1. The optical path assembly 500 may also include: a focusing lens 506, which can be fixed on the second support member 1012. Here, the second support member 1012 may have a second mounting groove B2, and a portion of the focusing lens 506 can be installed in the second mounting groove B2 to be fixed on the second support member 1012. In this way, the focusing lens 506 can be located between the first opening O1 and the light combining lens group 502. The focusing lens 506 can be used to focus the laser beam after being combined by the light combining lens group 502, and guide the focused laser beam to the first opening O1.

[0070] Optional, please refer to Figure 7 and Figure 8 , Figure 8: This is a schematic diagram of the structure of an optical engine provided by another embodiment of the present application. The main body 101 in the first shell 100 may also have a fourth opening O4 connected to the first accommodating cavity K1. The fourth opening O4 may be arranged opposite to the opening surface of the first mounting hole S1. Here, since the opening surface of the first mounting hole S1 intersects with the plane where the first opening O1 is located, the opening surface of the first opening O1 may intersect with the opening surface of the first mounting hole S1 and the surface where the fourth opening O4 is located, and may be located between the opening surface of the first mounting hole S1 and the surface where the fourth opening O4 is located.

[0071] Optionally, the first housing 100 may further include a first sealing cover 103. The first sealing cover 103 in the first housing 100 may be fixedly connected to the main body 101 at the fourth opening O4 of the main body 101. Thus, the first sealing cover 104 may cover the fourth opening O4 to seal the first accommodating cavity K1. In this manner, the first sealing cover 103 in the first housing 100 may seal the first accommodating cavity K1, thereby protecting the optical components of the optical path assembly 500 located within the first cavity K1.

[0072] It should be noted that after the optical engine 000 is integrated into the laser projection device, the first sealing cover 103 in the first housing 100 can be located between the main body 101 and the projection lens. Here, during the operation of the laser projection device, the laser generates a large amount of heat. The first sealing cover 103 can be used to isolate the laser 300 and the projection lens to prevent the heat generated by the laser 300 from being transferred to the projection lens and causing lens temperature drift. Thus, providing the first sealing cover 103 on the side of the main body 101 facing away from the laser 300 can isolate the heat generated by the laser 300 and improve the reliability of the projection lens.

[0073] Optional, such as Figure 8 and Figure 9 As shown, Figure 9 : This is a schematic diagram of the structure of another optical engine provided by another embodiment of the present application. The second shell 200 in the optical engine 000 may include: a first part 201 and a second part 202 connected to each other. The first part 201 in the second shell 200 can be used to connect to the first shell 100, and the first part 201 has a first sub-cavity K1. The second part 202 in the second shell 200 may have a second mounting hole S2 and a second sub-cavity K22 connected to the first sub-cavity K1. The second accommodating cavity K2 in the second shell 200 may include: a first sub-cavity K21 of the first part 201, and a second sub-cavity K22 of the second part 202.

[0074] Optional, such as Figure 6 and Figure 8As shown, the optical path assembly 500 may further include: a reflective lens 503 located within the first sub-cavity K21, and a prism assembly 504 located within the second sub-cavity K22. The reflective lens 503 in the optical path assembly 500 may be used to reflect the laser beam emitted through the first opening O1 toward the prism assembly 504. Here, the reflective lens 503 may reflect the laser beam focused by the focusing lens 506 toward the prism assembly 504. The prism assembly 504 in the optical path assembly 500 may be used to direct the laser beam reflected by the reflective lens 503 toward the DMD light valve 400. Here, the DMD light valve 400 may be used to modulate the laser beam, and the prism assembly 504 may also be used to direct the laser beam modulated by the DMD toward the projection lens.

[0075] It should be noted that if Figure 8 and Figure 10 As shown, Figure 10 This is a schematic diagram of the structure of a second supporting platform and adjustment assembly provided in an embodiment of the present application. A second supporting platform 2011 and an adjustment assembly 2012 may be provided within the first sub-cavity K21 of the first portion 201 of the second housing 200. The second supporting platform 2011 may include a second supporting platform body 2011a and a plurality of elastic elements 2011b. The reflector lens 503 in the optical path assembly 500 may be fixedly connected to the second supporting platform body 2011a. The second supporting platform body 2011a may have a plurality of connecting posts 2011c on a side facing away from the reflector lens 503. The plurality of connecting posts 2011c may correspond one-to-one with the plurality of elastic elements 2011b. Each elastic element 2011b may be sleeved onto a corresponding connecting post 2011c and may abut against the inner wall of the second supporting platform body 2011a and the inner wall of the first sub-cavity K21, respectively. At least one of the plurality of connecting posts 2011c may have an adjustment hole g1. The inner wall of the first sub-cavity K21 may have a through hole connected to the adjustment hole g1. In the present application, the adjustment hole g1 in the connecting column 2011c may be a threaded hole, and the adjustment component 2012 may be a screw. The adjustment component 2012 may be engaged with the adjustment hole g1 through the through hole. When the adjustment component 2012 is rotated, it can drive the second supporting platform body 2011a to rotate in one direction, thereby driving the reflective lens 503 to rotate. It should be noted that Figure 10 Only one elastic element is shown.

[0076] Optional, such as Figure 8As shown, the first portion 201 of the second housing 200 may further include a third opening O3 that communicates with the first sub-cavity K21. The surface of the first portion 201 where the third opening O3 is located may intersect with the surface where the second opening O2 is located. Here, the second support platform 2011 for supporting the reflective lens 503 may be located within the first sub-cavity K21 between the second opening O2 and the third opening O3. The reflective lens 503 may be placed into the first sub-cavity K21 through the third opening O3 and secured to the second support platform body 2011a within the second support platform 2011.

[0077] Optional, such as Figure 4 and Figure 8 As shown, the second housing 200 may further include a second sealing cover 203 fixedly connected to the first portion 201 at the third opening O3 of the first portion 201. Here, the second sealing cover 203 may cover the third opening O3 to seal the first sub-cavity K21. Thus, the second sealing cover 203 in the second housing 200 may seal the first sub-cavity K21 to protect the optical components of the optical path assembly 500 located within the first sub-cavity K21.

[0078] Optional, such as Figure 6 and Figure 9 As shown, a first support platform 204 may be provided between the first sub-cavity K21 and the second sub-cavity K22 of the second housing 200. The optical path assembly 500 may further include a homogenizing lens 505. The homogenizing lens 505 in the optical path assembly 500 may be used to homogenize the laser beam emitted by the reflective lens 503, and the homogenized laser beam may be directed to the prism assembly 504.

[0079] For this purpose, in this application, please refer to Figure 11 , Figure 11This is a light path diagram in an optical engine provided by an embodiment of the present application. The laser beam emitted by the laser 300 can be directed to the diffractive optical element 501, which can homogenize and shape the laser beam emitted by the laser 300. Next, the laser beam homogenized and shaped by the diffractive optical element can be directed to the light combining lens group 502. The light combining lens group 502 can combine the homogenized and shaped laser beams and direct the combined laser beams to the focusing lens 506. The focusing lens 506 can focus the combined laser beams and direct the focused laser beams to the reflective lens 503. The reflective lens 503 can direct the laser beam focused by the focusing lens to the homogenizing lens 505. The homogenizing lens 505 can homogenize the combined laser beams and then direct the laser beams to the prism group 504. The prism group 504 can direct the laser beams to the DMD light valve, and after the DMD light valve modulates the laser beams, the prism group 504 can also direct the modulated laser beams to the projection lens. The projection lens can project the incident laser light to form a projection image.

[0080] In the present application, the optical engine 000 may further include a first heat sink and a second heat sink. The first heat sink in the optical engine 000 may be located on the side of the DMD light valve 400 facing away from the second housing 200 to dissipate heat from the entire optical engine 000. The second heat sink in the optical engine 000 may be located on the side of the laser 300 facing away from the first housing 100 to dissipate heat from the laser 300.

[0081] In summary, an embodiment of the present application provides an optical engine, comprising: a first shell, a second shell, a laser, a DMD light valve, and an optical path assembly. A portion of the second opening in the second shell that is connected to the second accommodating cavity is connected to the first opening in the first shell that is connected to the first accommodating cavity, and another portion of the second opening is used to install a projection lens. That is, the first shell and the projection lens are both fixedly connected to the second shell at the second opening of the second shell. In this way, after the optical engine is integrated into the laser projection device, the light source device and the projection lens in the laser projection device can be installed on the same plane of the optical machine device, which effectively reduces the volume of the laser projection device integrated with the optical engine and facilitates the miniaturized design of the laser projection device.

[0082] The present application also provides a laser projection device, please refer to Figure 12 , Figure 12 Schematic diagram of the structure of a laser projection device provided by an embodiment of the present application. The laser projection device may include: a projection lens 011 and an optical engine 000. The optical engine 000 may be any of the optical engines described above. The projection lens in the laser projection device may be fixedly connected to the optical engine 000.

[0083] In this application, the laser beam emitted by the laser in the optical engine 000 is directed through the optical path component to the DMD light valve. The DMD light valve can be used to modulate the laser beam and then direct it to the projection lens. The projection lens can project the incoming laser light to form a projection image. The projection lens can include multiple lenses. The laser beam emitted from the DMD light valve can sequentially pass through the multiple lenses of the projection lens to the screen, thereby realizing the projection of the laser light by the projection lens and displaying the projection image.

[0084] In the present application, the projection lens 011 in the laser projection device and the first housing 100 in the optical engine 000 can be connected to the second housing 200 via the same plane of the second housing 200. In this way, the first housing 100 in the laser projection device can be located below the projection lens 011, thereby reducing the overall volume of the laser projection device and facilitating the miniaturization design of the laser projection device.

[0085] 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.

[0086] 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 first housing, a second housing, a laser, a digital micromirror device (DMD) light valve, and an optical path component; The first housing has: a first accommodating cavity, and a first mounting hole and a first opening communicating with the first accommodating cavity, wherein an opening surface of the first mounting hole intersects with a surface where the first opening is located; The laser is fixedly connected to the first housing outside the first accommodating cavity, and the light-emitting surface of the laser faces the first mounting hole; The second housing has: a second accommodating cavity, a second mounting hole communicating with the second accommodating cavity, and a second opening, wherein an opening surface of the second mounting hole is arranged opposite to the second opening; The DMD light valve is fixedly connected to the second housing outside the second accommodating cavity, and the light-receiving surface of the DMD light valve faces the second mounting hole; A portion of the optical path component is located in the first accommodating cavity, and another portion is located in the second accommodating cavity, and the optical path component is used to guide the laser beam emitted by the laser to the light receiving surface of the DMD light valve; The first shell is connected to the second shell, and the first opening is communicated with a portion of the second opening, and another portion of the second opening is used for assembling a projection lens.

2. The optical engine according to claim 1, wherein: The surface where the first opening is located is parallel to the surface where the second opening is located.

3. The optical engine according to claim 2, wherein: The optical engine further includes: a sealing plate connected to the second housing at the second opening, the sealing plate having a first slot and a second slot communicating with the second accommodating cavity; The first shell is connected to the sealing plate at the first slot, and the first opening is communicated with the first slot. The portion of the sealing plate where the second slot is located is used for assembling the projection lens.

4. The optical engine according to any one of claims 1 to 3, characterized in that: The first housing includes: a main body portion and a mounting portion connected to each other; the main body portion has the first accommodating cavity, and the mounting portion has the first mounting hole and first mounting grooves distributed around the first mounting hole; The optical path assembly includes: a diffractive optical element, a portion of the diffractive optical element is located in the first mounting groove, and another portion of the diffractive optical element covers a portion of the first mounting hole; The diffraction optical element is used to homogenize and shape the laser beam emitted by the laser.

5. The optical engine according to claim 4, wherein: A first support member is provided inside the first accommodating cavity, and the first support member is distributed around the periphery of the first mounting hole; The optical path assembly further comprises: a light combining lens group, wherein the light combining lens group is fixed on the first support member; The light combining mirror assembly is used to combine the laser beams homogenized and shaped by the diffractive optical element and then direct them to the first opening.

6. The optical engine according to claim 5, wherein: The main body further has a fourth opening communicating with the first accommodating cavity, and the fourth opening is arranged opposite to the opening surface of the first mounting hole; The first shell further includes a first sealing cover, which is fixedly connected to the main body at the fourth opening.

7. The optical engine according to any one of claims 1-3, 5-6, characterized in that: The second housing includes: a first portion and a second portion connected to each other, the first portion being connected to the first housing; the first portion having a first sub-cavity, the second portion having a second mounting hole, and a second sub-cavity communicating with the first sub-cavity; the second accommodating cavity includes the first sub-cavity and the second sub-cavity; The optical path assembly further includes: a reflective lens located in the first sub-cavity, and a prism group located in the second sub-cavity; The reflective lens is used to reflect the laser beam emitted through the first opening to the prism group, and the prism group is used to guide the laser beam reflected by the reflective lens to the DMD light valve.

8. The optical engine according to claim 7, wherein: The first portion further has a third opening communicating with the first sub-cavity, and a surface of the third opening intersects with a surface of the second opening; The second shell further includes a second sealing cover fixedly connected to the first part at the third opening.

9. The optical engine according to claim 7, wherein: A first supporting platform is provided between the first sub-cavity and the second sub-cavity; The optical path component further includes a homogenizing lens, which is used to homogenize the laser beam emitted by the reflective lens, and the homogenized laser beam can be directed to the prism group.

10. A laser projection device, characterized in that: include: A projection lens and an optical engine, wherein the optical engine is the optical engine according to any one of claims 1 to 9, and the projection lens is fixedly connected to the optical engine.

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