Optical projection device and electronic apparatus

Abstract

An optical projection device and an electronic apparatus. The optical projection device comprises: a fixed structure, which at least comprises a first side face, a second side face and a third side face, wherein the second side face is opposite the third side face, the first side face and the second side face are configured to provide light-incident ports, and the third side face is configured to provide a light-emergent port; a light-emitting structure fixed to side faces of the fixed structure, wherein the light-emitting structure is fixed to the first side face and the second side face, and the light-emitting structure comprises at least two light-emitting assemblies, each light-emitting assembly being fixed to one side face; and a color combining assembly fixed to the fixed structure, wherein the color combining assembly is of a flat plate structure, the surface of the color combining assembly comprises an optical film, and the optical film is configured to adjust, by means of transmission, reflection or a combination of transmission and reflection, the propagation path of light emitted by the light-emitting structure, so that the light emitted by the light-emitting structure is emitted through the third side face. The production efficiency of the optical projection device is improved, and the imaging quality is improved.

Description

Optical projection device and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on April 2, 2024, with application number 2024103998920 and invention name “Optical projection device and electronic device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the field of micro-display, and in particular to an optical projection device and electronic equipment. Background Art

[0003] Inorganic micro-pixel light-emitting diodes, also known as micro-LEDs, Micro LEDs, or μ-LEDs, have become increasingly important since they were adopted for a variety of applications, including self-luminous micro-displays, visible light communications, and optogenetics. Compared to traditional LEDs, Micro LEDs offer improved strain relaxation, better light extraction efficiency, uniform current spreading, and higher output performance. Micro LEDs also offer improved thermal effects, faster response times, a wider operating temperature range, higher resolution, a wider color gamut, higher contrast, lower power consumption, and higher current density, making them widely used in near-eye displays.

[0004] The performance and process of inorganic micro-pixel LED modules need to be continuously improved to meet more diverse display needs.

[0005] Summary of the Invention

[0006] The technical problem solved by the present invention is to provide an optical projection device and an electronic device to improve the performance and manufacturing process of an inorganic micro-pixel light emitting diode module.

[0007] To solve the above technical problems, the technical solution of the present invention provides an optical projection device, comprising: a fixed structure, the fixed structure comprising at least a first side surface, a second side surface, and a third side surface, the first side surface and the second side surface being used to provide a light injection port, and the third side surface being used to provide a light injection port; a light-emitting structure fixed to a side surface of the fixed structure, the light-emitting structure being fixed to the first side surface and the second side surface, the light-emitting structure comprising at least two light-emitting components, one of the light-emitting components being fixed to one side surface; a color-combining component fixed to the fixed structure, the color-combining component being a flat plate structure, the surface of the color-combining component comprising an optical film, the optical film being used to adjust the propagation path of the light emitted by the light-emitting structure through transmission, reflection, or a combination of transmission and reflection, so that the light emitted by the light-emitting structure is emitted through the third side surface.

[0008] Optionally, the technical solution of the present invention further provides an electronic device, including: the above-mentioned optical projection device.

[0009] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0010] In the optical projection device of the present invention, the color combining component is a flat-plate structure, which can greatly reduce the production cost and processing technology requirements of the color combining component, thereby improving the production efficiency of the optical projection device. In addition, the flat-plate structure has fewer interfaces, and the interference of light rays passing through the color combining component by the interfaces is reduced, thereby improving the propagation efficiency of light and further enhancing the imaging quality.

[0011] Furthermore, the color combining component includes a first color combining element, which is a flat plate structure, which can reduce production costs and improve production efficiency. In addition, the interface of a flat plate structure is simple, and the light is less likely to be interfered with by the interface when passing through the color combining component, thereby improving the propagation efficiency of the light and further improving the imaging quality.

[0012] Furthermore, the color combining assembly includes a first color combining element and a second color combining element. The second color combining element includes a first portion and a second portion, the first portion and the second portion being fixed to the first surface and the second surface of the first color combining element, respectively. The first and second color combining elements are arranged crosswise, facilitating alignment and reducing the occurrence of "ghosting" in imaging due to misalignment of the color combining elements. Furthermore, the color combining assembly only requires bonding the first portion to the first color combining element and the second portion to the first color combining element, resulting in fewer bonding elements and improved production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG1 is a schematic structural diagram of an optical projection device in one embodiment.

[0014] 2 and 3 are schematic structural diagrams of an optical projection device according to an embodiment of the present invention;

[0015] FIG4 is a schematic structural diagram of an optical projection device according to another embodiment of the present invention;

[0016] 5 to 8 are schematic structural diagrams of an optical projection device according to another embodiment of the present invention;

[0017] FIG9 is a schematic structural diagram of an optical projection device according to another embodiment of the present invention;

[0018] FIG10 is a schematic structural diagram of an optical projection device in another embodiment of the present invention. DETAILED DESCRIPTION

[0019] As described in the background art, the performance and manufacturing process of inorganic micro-pixel LED modules need to be continuously improved to meet more diverse display requirements. This will now be analyzed and explained in conjunction with specific embodiments.

[0020] FIG1 is a schematic structural diagram of an optical projection device in one embodiment.

[0021] Please refer to Figure 1, the optical projection device includes: a fixing structure 100, the fixing structure 100 is in the shape of a rectangular parallelepiped, the rectangular parallelepiped includes a closed second fixing portion and a first fixing portion, the rectangular parallelepiped includes a first side surface, a second side surface, a fourth side surface and a third side surface, the first side surface, the second side surface, the fourth side surface and the third side surface are arranged between the second fixing portion and the first fixing portion and are respectively connected to the second fixing portion and the first fixing portion, the first side surface and the fourth side surface are opposite to each other, and the second side surface and the third side surface are opposite to each other; a first light-emitting component 301 fixed to the first side surface of the fixing structure 100, the first light-emitting component 301 is used to emit a first monochromatic light; a second light-emitting component 302 fixed to the second side surface of the fixing structure 100, the second light-emitting component 302 is used to emit a second monochromatic light; a third light-emitting component 303 fixed to the fourth side surface of the fixing structure 100, the third light-emitting component 303 is used to emit The third monochromatic light, the first monochromatic light, the second monochromatic light and the third monochromatic light respectively include one of the three colors of red, green and blue, and the first monochromatic light, the second monochromatic light and the third monochromatic light are different from each other; a color combining component vertically fixed to the first fixed part of the fixed structure 100, the color combining component includes a first prism 201, a second prism 202, a third prism 203 and a fourth prism 204, the first prism 201, the second prism 202, the third prism 203 and the fourth prism 204 are fitted together, the color combining component is used to adjust the propagation path of the light emitted by the first light-emitting component 301, the second light-emitting component 302 and the third light-emitting component 303, so that the light emitted by the light-emitting structure is emitted through the third side; an optical imaging component 400 fixed to the third side of the fixed structure 100, the optical imaging component 400 is used to receive the light emitted by the light-emitting structure through the third side, and emit the processed light for imaging.

[0022] In this embodiment, the first prism 201, the second prism 202, the third prism 203 and the fourth prism 204 are right-angle prisms, and the right-angled surfaces of the first prism 201, the second prism 202, the third prism 203 and the fourth prism 204 are bonded together by transparent optical glue. During the bonding process, the right-angled surfaces of the four right-angle prisms may not be aligned, resulting in multiple interfaces in the light-combining component. On the one hand, the light-combining quality of the light-combining component will be reduced, affecting the projection quality of the optical projection device; on the other hand, multiple interfaces cause differences in the time at which light is emitted, resulting in "ghost images" in the projection of the projection system using the optical projection device.

[0023] In addition, the light combining assembly requires bonding the first prism 201 , the second prism 202 , the third prism 203 and the fourth prism 204 together, which results in high production costs, a long process flow and time, and low production efficiency.

[0024] In order to solve the above problems, the technical solution of the present invention provides an optical projection device and an electronic device. The color combining component in the optical projection device is a flat-plate structure, which can greatly reduce the production cost and processing technology requirements of the color combining component, and can improve the production efficiency of the optical projection device; in addition, the flat-plate structure has fewer interfaces, and the light is less likely to be interfered with by the interface when passing through the color combining component, thereby improving the propagation efficiency of the light and further improving the imaging quality.

[0025] In order to make the above-mentioned objects, features and beneficial effects of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0026] 2 and 3 are schematic structural diagrams of an optical projection device according to an embodiment of the present invention.

[0027] Please refer to Figures 2 and 3. Figure 2 is a schematic top view of the optical projection device, and Figure 3 is a schematic three-dimensional structure diagram of the fixing structure 10 in Figure 2. The optical projection device includes:

[0028] A fixing structure 10, comprising at least a first side surface S1, a second side surface S2, and a third side surface S4, wherein the second side surface S2 and the third side surface S4 are opposite to each other, the first side surface S1 and the second side surface S2 are used to provide light injection ports, and the third side surface S4 is used to provide a light emission port;

[0029] A light-emitting structure fixed to a side surface of the fixing structure 10, wherein the light-emitting structure is fixed to the first side surface S1 and the second side surface S2, and the light-emitting structure includes at least two light-emitting components, one of which is fixed to each side surface;

[0030] The color combining component fixed to the fixed structure 10 is a flat plate structure, and the surface of the color combining component includes an optical film, which is used to adjust the propagation path of the light emitted by the light-emitting structure through transmission, reflection, or a combination of transmission and reflection, so that the light emitted by the light-emitting structure is emitted through the third side S4.

[0031] In this embodiment, the fixing structure 10 further includes a fourth side surface S3 , and the first side surface S1 and the fourth side surface S3 are opposite to each other.

[0032] In other embodiments, the fixing structure may not include the fourth side.

[0033] In this embodiment, the optical projection device further includes: an optical imaging component 40 fixed to the third side surface S4 of the fixed structure 10, and the optical imaging component 40 is used to receive the light emitted from the light-emitting structure through the third side surface S4, and emit the processed light for imaging.

[0034] The color combining component of the optical projection device is a flat-plate structure, which can greatly reduce the production cost and processing technology requirements of the color combining component, and can improve the production efficiency of the optical projection device; in addition, the flat-plate structure has fewer interfaces, and the light is less likely to be interfered with by the interface when passing through the color combining component, thereby improving the propagation efficiency of the light and further improving the imaging quality.

[0035] In this embodiment, the fixing structure 10 further includes a second fixing portion 11 and a first fixing portion 12 opposite to each other, and the first side surface S1, the second side surface S2, the fourth side surface S3, and the third side surface S4 are disposed between the second fixing portion 11 and the first fixing portion 12 and are respectively connected to the second fixing portion 11 and the first fixing portion 12. The second fixing portion 11 and the first fixing portion 12 include flat surfaces or protruding surfaces.

[0036] In this embodiment, the surfaces of the second fixing portion 11 and the first fixing portion 12 are planar surfaces.

[0037] In one embodiment, the second fixing portion 11 and the first fixing portion 12 have grooves in their planes for mounting the color combining component. In one embodiment, the second fixing portion and the first fixing portion may not have grooves in their planes.

[0038] In other embodiments, the fixing structure 10 may not include the second fixing portion 11 .

[0039] Please continue to refer to Figure 3. In this embodiment, the fixing structure 10 includes a first through hole passing through the first side surface S1, a second through hole passing through the second side surface S2, a fourth through hole passing through the fourth side surface S3, and a third through hole passing through the third side surface S4. The first through hole and the fourth through hole are opposite to each other, and the second through hole and the third through hole are opposite to each other; the light-emitting structure is fixed to the edges around the through holes.

[0040] In this embodiment, the adjacent first through holes, second through holes, fourth through holes and third through holes are isolated from each other by the edges of the rectangular parallelepiped. In other embodiments, the adjacent first through holes, second through holes, fourth through holes and third through holes are interconnected.

[0041] In this embodiment, the second fixing portion 11 and the first fixing portion 12 are complete surfaces. In other embodiments, the second fixing portion 11 and the first fixing portion 12 also have through holes penetrating the second fixing portion 11 and the first fixing portion 12 .

[0042] In other embodiments, the first side, second side, fourth side and third side of the fixed structure are transparent structures; the light-emitting structure is adhered to at least two of the first side, second side and fourth side; and the optical imaging component is adhered to the third side.

[0043] The shape of the fixing structure 10 includes a rectangular parallelepiped or a polygonal column, and the polygonal column includes a pentagonal column, a hexagonal column, an octagonal column, etc.

[0044] In this embodiment, the shape of the fixing structure 10 includes a rectangular parallelepiped, and the rectangular parallelepiped includes a cube.

[0045] In this embodiment, the fixing structure 10 includes an injection-molded structural component.

[0046] 2 , in this embodiment, the color combining assembly includes a first color combining element 31 . The first color combining element 31 is a flat plate structure. The first color combining element 31 includes a first surface P1 and a second surface P2 that are opposite to each other.

[0047] In this embodiment, the color combining component is made of K9L glass, BK7 glass, or PMMA (Polymethyl Methacrylate). The material of the color combining component has a high transmittance, which helps the color combining component to transmit light emitted by the light-emitting element with a high transmittance.

[0048] In this embodiment, the length direction of the first color combining element 31 coincides with the diagonal line of the first fixing portion 12. In other embodiments, the length direction of the first color combining element and the diagonal line of the first fixing portion may not coincide.

[0049] In this embodiment, both ends of the first color combining element 31 are connected to the diagonal edges of the first fixing portion 12. In other embodiments, both ends of the first color combining element are connected to other fixable edges of the fixing structure.

[0050] In this embodiment, the color combining component is fixed vertically to the first fixing portion 12. In other embodiments, the color combining component may not be fixed vertically to the first fixing portion.

[0051] In this embodiment, the color combining component is connected to the second fixing portion 11 of the fixing structure 10, and there is no gap between the color combining component and the second fixing portion 11 and the first fixing portion 12 to avoid light loss. In other embodiments, the color combining component may not be connected to the second fixing portion of the fixing structure.

[0052] In this embodiment, the first color combining element 31 is fixed to the fixing structure 10 by gluing.

[0053] In other embodiments, the first color combining element 31 is fixed to the fixed structure by bonding or other methods. The bonding may be direct bonding or indirect bonding. The direct bonding method includes direct contact bonding between the first color combining element and the fixed structure; the indirect bonding method includes bonding via a bonding material, including forming a bonding layer between the first color combining element and the fixed structure for bonding.

[0054] In this embodiment, the parallelism between the first surface P1 and the second surface P2 of the first color combining element 31 is less than 1°.

[0055] In this embodiment, the thickness of the first color combining element 31 ranges from 0.11 mm to 1.0 mm.

[0056] 2 , in this embodiment, the light-emitting structure includes a first light-emitting component 21 and a second light-emitting component 22 .

[0057] The first light-emitting assembly 21 includes: a driving backplane and a first light-emitting element array disposed on the driving backplane; and a support member, on which the driving backplane is disposed.

[0058] In other embodiments, the first light-emitting component may not include the support member.

[0059] The second light-emitting assembly 22 includes: a driving backplane and a second light-emitting element array disposed on the driving backplane; and a support member, on which the driving backplane is disposed.

[0060] In other embodiments, the second light-emitting component may not include the support member.

[0061] The first light-emitting element includes LED, OLED, AMOLED, MiniLED or MicroLED; the second light-emitting element includes LED, OLED, AMOLED, MiniLED or MicroLED.

[0062] In this embodiment, the first light-emitting element includes a MicroLED; the second light-emitting element includes a MicroLED.

[0063] The driving backplane includes an IC backplane or a TFT backplane.

[0064] The support member is used to provide strength support for the driving back plate and the light emitting element array. The material of the support member includes invar steel, aluminum or ceramics and other materials with supporting and heat dissipation functions.

[0065] In other embodiments, the lighting assembly can include no support member.

[0066] In one embodiment, the first light emitting component 21 is configured to emit dual-color light, and the second light emitting component 22 is configured to emit monochromatic light. The dual-color light includes two colors of red, green, and blue, and the monochromatic light includes one color of red, green, and blue except the dual-color light.

[0067] In another embodiment, the first light emitting component 21 is configured to emit monochromatic light, and the second light emitting component 22 is configured to emit bicolor light, wherein the bicolor light includes two colors of red, green, and blue, and the monochromatic light includes one color of red, green, and blue except the bicolor light.

[0068] In this embodiment, the first light-emitting component 21 is fixed to the edge around the first through hole, and the second light-emitting component 22 is fixed to the edge around the second through hole; the first surface P1 of the first color-combining element 31 faces the second through hole and the fourth through hole, and the second surface P2 of the first color-combining element 31 faces the first through hole and the third through hole. The first color-combining element 31 is used to transmit the two-color light or monochromatic light emitted by the second light-emitting component 22, and the first color-combining element 31 is used to reflect the monochromatic light or two-color light emitted by the first light-emitting component 21.

[0069] In this embodiment, the first light-emitting component 21 is fixed to the edge of the cuboid by gluing; the second light-emitting component 22 is fixed to the edge of the cuboid by gluing.

[0070] The materials used in the adhesive bonding method include optically transparent adhesive, which includes: acrylate, epoxy resin, polyester, etc.

[0071] The first light-emitting component includes an edge area and a light-emitting area, and the edge area is a non-light-emitting area; the second light-emitting component includes an edge area and a light-emitting area, and the edge area is a non-light-emitting area.

[0072] In one embodiment, the adhesive bonding method includes: applying optically transparent adhesive to the edge region of the first light-emitting component, whereby the first light-emitting component is secured to the fixed structure via the optically transparent adhesive; and applying optically transparent adhesive to the edge region of the second light-emitting component, whereby the second light-emitting component is secured to the fixed structure via the optically transparent adhesive. Applying optically transparent adhesive to the edge region of the first light-emitting component and the edge region of the second light-emitting component prevents the optically transparent adhesive from affecting the transmittance of light emitted from the light-emitting region, thereby affecting the brightness of the light.

[0073] In another embodiment, the adhesive bonding method includes: applying optically transparent adhesive to both the edge region and the light-emitting region of the first light-emitting component, wherein the first light-emitting component is fixed to the fixed structure via the optically transparent adhesive; and applying optically transparent adhesive to both the edge region and the light-emitting region of the second light-emitting component, wherein the second light-emitting component is fixed to the fixed structure via the optically transparent adhesive. The optically transparent adhesive has a thickness of 0.05 mm to 0.3 mm. This thickness of optically transparent adhesive can secure the first and second light-emitting components while also ensuring light transmittance in the light-emitting regions.

[0074] In other embodiments, the first light-emitting component is fixed to the fixed structure by bonding; and the second light-emitting component is fixed to the fixed structure by bonding.

[0075] The bonding includes direct bonding or indirect bonding. The direct bonding includes direct contact bonding between the light emitting structure and the fixed structure; the indirect bonding includes bonding through a bonding material, including forming a bonding layer between the light emitting structure and the fixed structure for bonding.

[0076] It should be noted that, in order to conveniently illustrate the position of the light-emitting structure in FIG2 , the first light-emitting component 21 and the second light-emitting component 22 are peeled off from the fixed structure 10 , but in fact the first light-emitting component 21 and the second light-emitting component 22 are fixedly combined with the fixed structure 10 .

[0077] In this embodiment, the optical film includes: an anti-reflection film located on the first surface P1 of the first color combining element 31 ; and a reflective film located on the second surface P2 of the first color combining element 31 .

[0078] The anti-reflection film is used to improve the transmittance of the two-color light or monochromatic light emitted by the second light-emitting component 22 through the first color-combining element 31, and the reflective film is used to improve the reflectivity of the first light-emitting component 21 on the second surface P2 of the first color-combining element 31, so that the color-combining component adjusts the propagation path of the light emitted by the light-emitting structure through transmission or reflection, so that the light emitted by the light-emitting structure is emitted through the third through hole and enters the optical imaging component 40.

[0079] It should be noted that the reflective film in this embodiment reflects light incident on the second surface P2 of the first color combining element 31 from the first light-emitting component 21, while also transmitting light emitted by the second light-emitting component 22. The light emitted by the first light-emitting component 21 and the second light-emitting component 22 has different wavelengths, so the same reflective film has different effects of reflecting and transmitting the light emitted by the first light-emitting component 21 and the second light-emitting component 22, respectively.

[0080] Please continue to refer to Figure 2. The light R1 emitted by the first light-emitting component 21 is reflected by the second surface P2 of the first color-combining element 31 and enters the optical imaging component 40 through the third through hole; the light R2 emitted by the second light-emitting component 22 is transmitted through the first color-combining element 31 and enters the optical imaging component 40 through the third through hole.

[0081] The color combining component includes a first color combining element 31, which is a flat plate structure, which can reduce production costs and improve production efficiency. In addition, the interface of a flat plate structure is simple, and the light is less likely to be interfered with by the interface when passing through the color combining component, thereby improving the propagation efficiency of the light and further improving the imaging quality.

[0082] In this embodiment, the optical imaging assembly 40 includes a housing and at least one lens disposed in the housing. The optical imaging assembly 40 is capable of collimating light incident into the optical imaging assembly 40 and then emitting the light.

[0083] In this embodiment, one end of the first color combining element 31 is connected to the edge between the first side surface S1 and the second side surface S2 , and the other end of the first color combining element 31 is connected to the edge between the fourth side surface S3 and the third side surface S4 .

[0084] In other embodiments, both ends of the first color-combining element may be connected to other feasible edges of the fixed structure; or, both ends of the first color-combining element may not be connected to the edges of the fixed structure.

[0085] In this embodiment, the cuboid includes a first through-hole extending through the first side surface S1, a second through-hole extending through the second side surface S2, a fourth through-hole extending through the fourth side surface S3, and a third through-hole extending through the third side surface S4. The light-emitting structure includes a first light-emitting component 21 and a second light-emitting component 22. The first light-emitting component 21 is secured to the edge surrounding the first through-hole, and the second light-emitting component 22 is secured to the edge surrounding the second through-hole. A light shield is provided in the fourth through-hole, where no light-emitting component is secured, to prevent ambient light from entering the color combining component and affecting imaging.

[0086] In other embodiments, a light shielding plate may not be provided in the fourth through hole where the light emitting component is not fixed.

[0087] In other embodiments, the first, second, fourth, and third sides of the fixing structure are transparent; the light-emitting structure includes a first light-emitting component and a second light-emitting component, the first light-emitting component being bonded to the first side by optical adhesive, and the second light-emitting component being bonded to the second side by optical adhesive, bonding, snap fastening, or the like. A light-shielding layer is provided on the fourth side surface to which the light-emitting component is not bonded to prevent ambient light from entering the color combining component and affecting imaging.

[0088] The transparent structure includes a flat plate structure, and the material of the transparent structure includes PMMA (Polymethyl Methacrylate) or glass.

[0089] In other embodiments, the light shielding layer may not be provided on the fourth side surface to which the light emitting component is not bonded.

[0090] Correspondingly, an embodiment of the present invention further provides an electronic device, which includes: the optical projection device as described in FIG. 2 and FIG. 3 .

[0091] The electronic device includes a micro projector or a near-eye display device. The micro projector includes a color micro light engine and a projection panel, and the light emitted by the color micro light engine is projected on a transparent panel; the near-eye display device includes AR (Augmented Reality), VR (Virtual Reality), MR (Mediated Reality), etc. The near-eye display device includes a wearable device and a color micro light engine provided on the wearable device, and the light emitted by the color micro light engine can be projected on the wearable device.

[0092] FIG4 is a schematic structural diagram of an optical projection device in another embodiment of the present invention.

[0093] Please refer to Figure 4. The difference between the optical projection device in Figure 4 and the optical projection device in Figures 2 and 3 is that: in this embodiment, the first light-emitting component 21 is fixed to the second side surface S2, and the second light-emitting component 22 is fixed to the fourth side surface S3; the first surface P1 of the first color combining element 31 faces the first side surface S1 and the second side surface S2, and the second surface P2 of the first color combining element 31 faces the fourth side surface S3 and the third side surface S4; the first color combining element 31 is used to transmit the two-color light or monochromatic light emitted by the first light-emitting component 21, and the first color combining element 31 is used to reflect the monochromatic light or two-color light emitted by the second light-emitting component 22.

[0094] In this embodiment, the optical film includes: an anti-reflection film located on the first surface P1 of the first color combining element 31 ; and a reflective film located on the second surface P2 of the first color combining element 31 .

[0095] The anti-reflection film is used to improve the transmittance of the two-color light or monochromatic light emitted by the first light-emitting component 21 through the first color-combining element 31, and the reflective film is used to improve the reflectivity of the second light-emitting component 22 on the second surface P2 of the first color-combining element 31, so that the color-combining component adjusts the propagation path of the light emitted by the light-emitting structure through transmission or reflection, so that the light emitted by the light-emitting structure is emitted through the third through hole and enters the optical imaging component 40.

[0096] It should be noted that the reflective film in this embodiment reflects light incident on the second surface P2 of the first color combining element 31 from the second light-emitting component 22, while also transmitting light emitted by the first light-emitting component 21. The light emitted by the first and second light-emitting components 21 and 22 has different wavelengths, so the same reflective film has different effects of transmitting and reflecting the light emitted by the first and second light-emitting components 21 and 22, respectively.

[0097] Please continue to refer to Figure 4. The light R1 emitted by the first light-emitting component 21 passes through the first color-combining element 31 and enters the optical imaging component 40 through the third through hole; the light R2 emitted by the second light-emitting component 22 is reflected on the second surface P2 of the first color-combining element 31 and enters the optical imaging component 40 through the third through hole.

[0098] In this embodiment, one end of the first color combining element 31 is connected to the edge between the first side surface S1 and the third side surface S4 , and the other end of the first color combining element 31 is connected to the edge between the fourth side surface S3 and the second side surface S2 .

[0099] In other embodiments, both ends of the first color-combining element may be connected to other feasible edges of the fixed structure; or, both ends of the first color-combining element may not be connected to the edges of the fixed structure.

[0100] In this embodiment, the cuboid includes a first through-hole extending through the first side surface S1, a second through-hole extending through the second side surface S2, a fourth through-hole extending through the fourth side surface S3, and a third through-hole extending through the third side surface S4. The light-emitting structure includes a first light-emitting component 21 and a second light-emitting component 22. The first light-emitting component 21 is secured to the edge surrounding the second through-hole, and the second light-emitting component 22 is secured to the edge surrounding the fourth through-hole. A light shield is provided in the first through-hole where the light-emitting component is not secured to prevent ambient light from entering the color combining component and affecting imaging.

[0101] In other embodiments, a light shielding plate may not be provided in the first through hole where the light emitting component is not fixed.

[0102] In other embodiments, the first, second, fourth, and third sides of the fixing structure are transparent; the light-emitting structure includes a first light-emitting component and a second light-emitting component, the first light-emitting component being bonded to the second side by optical adhesive, and the second light-emitting component being bonded to the fourth side by optical adhesive, bonding, snap fastening, or the like. A light-shielding layer is provided on the first side surface to which the light-emitting component is not bonded to prevent ambient light from entering the color combining component and affecting imaging.

[0103] The transparent structure includes a flat plate structure, and the material of the transparent structure includes PMMA (Polymethyl Methacrylate) or glass.

[0104] In other embodiments, the light shielding layer may not be provided on the first side surface to which the light emitting component is not bonded.

[0105] Correspondingly, an embodiment of the present invention further provides an electronic device, which includes: the optical projection device as described in FIG. 4 .

[0106] The electronic device includes a micro projector or a near-eye display device. The micro projector includes a color micro light engine and a projection panel, and the light emitted by the color micro light engine is projected on a transparent panel; the near-eye display device includes AR (Augmented Reality), VR (Virtual Reality), MR (Mediated Reality), etc. The near-eye display device includes a wearable device and a color micro light engine provided on the wearable device, and the light emitted by the color micro light engine can be projected on the wearable device.

[0107] 5 to 8 are schematic structural diagrams of an optical projection device according to another embodiment of the present invention.

[0108] Please refer to Figures 5 and 8. Figure 5 is a schematic top view of the optical projection device, and Figures 6 to 8 are schematic three-dimensional structural diagrams of the fixing structure 10 in Figure 5. The optical projection device includes:

[0109] The fixing structure 10 includes at least a first side surface S1, a second side surface S2, and a third side surface S4. The second side surface S2 and the third side surface S4 are opposite to each other. The first side surface S1 and the second side surface S2 are used to provide light injection ports, and the third side surface S4 is used to provide a light emission port.

[0110] A light-emitting structure fixed to a side surface of the fixing structure 10, wherein the light-emitting structure is fixed to at least two side surfaces among the first side surface S1, the second side surface S2, and the fourth side surface S3, and the light-emitting structure includes at least two light-emitting components, one of which is fixed to each side surface;

[0111] The color combining component fixed to the fixed structure 10 is a flat plate structure, and the surface of the color combining component includes an optical film, which is used to adjust the propagation path of the light emitted by the light-emitting structure through transmission, reflection, or a combination of transmission and reflection, so that the light emitted by the light-emitting structure is emitted through the third side S4.

[0112] In this embodiment, the fixing structure 10 further includes a fourth side surface S3 , and the first side surface S1 and the fourth side surface S3 are opposite to each other.

[0113] In other embodiments, the fixing structure may not include the fourth side.

[0114] In this embodiment, the optical projection device further includes: an optical imaging component 40 fixed to the third side surface S4 of the fixed structure 10, and the optical imaging component 40 is used to receive the light emitted from the light-emitting structure through the third side surface S4, and emit the processed light for imaging.

[0115] In the optical projection device, the color combining component is a flat-plate structure, which can greatly reduce the production cost and processing technology requirements of the color combining component, and can improve the production efficiency of the optical projection device. In addition, the flat-plate structure has fewer interfaces, and the interference of light on the interfaces when passing through the color combining component is reduced, thereby improving the propagation efficiency of light and further improving the imaging quality.

[0116] Please continue to refer to Figures 6 to 8. Figure 6 is a schematic diagram of the fixing structure 10 without the second fixing portion 11, and Figure 7 is a schematic diagram of the second fixing portion 11 of the fixing structure 10. In this embodiment, the fixing structure 10 also includes a second fixing portion 11 and a first fixing portion 12 that are opposite to each other. The first side surface S1, the second side surface S2, the fourth side surface S3, and the third side surface S4 are disposed between the second fixing portion 11 and the first fixing portion 12 and are respectively connected to the second fixing portion 11 and the first fixing portion 12. The second fixing portion 11 and the first fixing portion 12 include flat surfaces or protruding surfaces.

[0117] The first fixing portion 12 and the second fixing portion 11 serve as the bottom and top of the fixing structure.

[0118] In this embodiment, the first fixing portion 12 is the bottom of the fixing structure, and the second fixing portion 11 is the top of the fixing structure.

[0119] In other embodiments, the fixing structure 10 may not include the second fixing portion 11 , as shown in FIG. 6 .

[0120] In this embodiment, the surfaces of the second fixing portion 11 and the first fixing portion 12 are planar surfaces.

[0121] Please continue to refer to Figure 5. In this embodiment, the rectangular parallelepiped includes a first through hole passing through the first side surface S1, a second through hole passing through the second side surface S2, a fourth through hole passing through the fourth side surface S3, and a third through hole passing through the third side surface S4. The first through hole and the fourth through hole are opposite to each other, and the second through hole and the third through hole are opposite to each other; the light-emitting structure is fixed to the edges around the through holes.

[0122] In this embodiment, adjacent first through holes, second through holes, fourth through holes and third through holes are isolated from each other by edges of the rectangular parallelepiped.

[0123] In other embodiments, adjacent first through holes, second through holes, fourth through holes and third through holes are interconnected.

[0124] In this embodiment, the second fixing portion 11 and the first fixing portion 12 are complete surfaces. In other embodiments, the second fixing portion 11 and the first fixing portion 12 also have through holes penetrating the second fixing portion 11 and the first fixing portion 12 .

[0125] The shape of the fixing structure 10 includes a rectangular parallelepiped or a polygonal column, and the polygonal column includes a pentagonal column, a hexagonal column, an octagonal column, etc.

[0126] In this embodiment, the shape of the fixing structure 10 includes a rectangular parallelepiped, and the rectangular parallelepiped includes a cube.

[0127] In this embodiment, the fixing structure 10 includes an injection-molded structural component.

[0128] In other embodiments, the first side, second side, fourth side and third side of the fixed structure are transparent structures; the light-emitting structure is fixed to at least two of the first side, second side and fourth side; and the optical imaging component is fixed to the third side.

[0129] The transparent structure includes a flat plate structure, and the material of the transparent structure includes PMMA (Polymethyl Methacrylate) or glass.

[0130] Please continue to refer to Figure 5. In this embodiment, the color combining component includes a first color combining element 31 and a second color combining element; the first color combining element 31 is a flat plate structure, and the first color combining element 31 includes a first surface P1 and a second surface P2 opposite to each other; the second color combining element is a flat plate structure, and the second color combining element includes a third surface P3 and a fourth surface P4 opposite to each other, and the second color combining element includes a first part 32 and a second part 33, and the first part 32 and the second part 33 are respectively fixed to the first surface P1 and the second surface P2 of the first color combining element 31, and the length directions of the first part 32 and the second part 33 intersect with the length direction of the first color combining element 31.

[0131] The color combining component is a flat plate structure, the plane of the flat plate structure has an extension direction, and the length direction is the extension direction of the plane of the flat plate structure parallel to the bottom surface of the fixed structure.

[0132] In this embodiment, the bottom surface of the fixing structure is the surface of the first fixing portion 12 .

[0133] In this embodiment, the color combining component is made of K9L glass, BK7 glass, or PMMA (Polymethyl Methacrylate). The material of the color combining component has a high transmittance, which helps the color combining component to transmit light emitted by the light-emitting element with a high transmittance.

[0134] In this embodiment, the length direction of the first color combining element 31 coincides with the first diagonal line of the first fixing portion 12. In other embodiments, the length direction of the first color combining element and the first diagonal line of the first fixing portion may not coincide.

[0135] In this embodiment, both ends of the first color combining element 31 are connected to the first diagonal edge of the first fixing portion 12. In other embodiments, both ends of the first color combining element are connected to other fixable edges of the fixing structure.

[0136] In this embodiment, the first portion 32 and the second portion 33 coincide with the second diagonal line of the first fixing portion 12. In other embodiments, the first portion and the second portion do not coincide with the second diagonal line of the first fixing portion.

[0137] In this embodiment, the color combining component is fixed vertically to the first fixing portion 12. In other embodiments, the color combining component may not be fixed vertically to the first fixing portion.

[0138] In this embodiment, the color combining component is connected to the second fixing portion 11 of the fixing structure 10, and there is no gap between the color combining component and the second fixing portion 11 and the first fixing portion 12 to avoid light loss. In other embodiments, the color combining component may not be connected to the second fixing portion of the fixing structure.

[0139] In this embodiment, the first color combining element 31 is fixed to the fixing structure 10 by gluing; the first portion 32 and the second portion 33 are fixed to the first surface P1 and the second surface P2 of the first color combining element 31 respectively by optical gluing.

[0140] In other embodiments, the first color-combining element is fixed to the fixing structure by bonding; the first part and the second part are fixed to the first surface and the second surface of the first color-combining element respectively by bonding.

[0141] The bonding includes direct bonding or indirect bonding. The direct bonding includes direct contact bonding between the color combining component and the fixed structure; the indirect bonding includes bonding through a bonding material, including forming a bonding layer between the color combining component and the fixed structure for bonding.

[0142] The color combining assembly only needs to fix the first portion 32 and the first color combining element 31 , and fix the second portion 33 and the first color combining element 32 . This reduces the number of fixed elements and improves production efficiency.

[0143] In this embodiment, the parallelism between the first surface P1 and the second surface P2 of the first color combining element 31 is less than 1°; the parallelism between the third surface P3 and the fourth surface P4 of the second color combining element is less than 1°.

[0144] In this embodiment, the thickness of the first color combining element 31 ranges from 0.11 mm to 1.0 mm; the thickness of the first portion ranges from 0.11 mm to 1.0 mm; and the thickness of the second portion ranges from 0.11 mm to 1.0 mm.

[0145] In this embodiment, the first portion and the second portion have the same thickness.

[0146] In other embodiments, the thicknesses of the first portion and the second portion may be different. The first portion and the second portion are both flat plate structures.

[0147] Continuing to refer to Figures 6 to 8, in this embodiment, the fixing structure 10 has an installation opening for installing the color combining component. The fixing structure 10 also includes: a groove provided on the first fixing portion 12 and the prism that matches the color combining component, and a groove provided on the side of the second fixing portion 11 that matches the color combining component facing the color combining component. The method of installing the color combining component to the fixing structure 10 includes: aligning the length direction of the color combining component with the diagonal of the first fixing portion 12 of the fixing structure 10 through the installation opening, and matching the height of the color combining component with the height of the fixing structure 10; and installing the color combining component in the grooves of the first fixing portion 12, the prism, and the second fixing portion 11 that match the color combining component, thereby securing the color combining component.

[0148] In another embodiment, the fixing structure 10 includes a first fixing portion 12 and a second fixing portion 11. The first fixing portion 12 has a first mounting opening, and a surface of the first fixing portion 12 facing the first color combining element 31 and the prism have a first groove that matches the first color combining element 31. The second fixing portion 11 has a second mounting opening that matches the first mounting opening, and a surface of the second fixing portion 11 facing the second color combining element has a second groove that matches the second color combining element, the second groove corresponding to the first groove to facilitate installation of the color combining component. A method for installing the color combining component to the fixing structure 10 includes: installing the first color combining element 31 in the first groove through the first mounting opening; installing the first part 32 and the second part 33 of the second color combining element in the second groove through the second mounting opening; and then correspondingly fixing the first mounting opening of the first fixing portion 12 and the second mounting opening of the second fixing portion 11 so that the first part 32 and the second part 33 are in the same plane, thereby achieving installation of the color combining component.

[0149] In another embodiment, the material of the fixing structure 10 has a certain deformation range, and the method of installing the color combining component to the fixing structure 10 includes: the fixing structure 10 has a mounting port, the first fixing portion 12, the second fixing portion 11, and the prism of the fixing structure 10 have grooves matching the color combining component, and the color combining component is installed in the groove of the fixing structure 10 through the mounting port to fix the color combining component.

[0150] In the above embodiments, the first fixing portion 12, the second fixing portion 11, and the prism of the fixing structure 10 are all provided with grooves to secure the color combining component. In other embodiments, the first fixing portion, the second fixing portion, and the prism of the fixing structure may not be provided with grooves. In other embodiments, the color combining component and the fixing structure may be secured with optically transparent adhesive. Specifically, optically transparent adhesive may be applied to the side of the color combining component (the side secured to the fixing structure), or optically transparent adhesive may be applied to the location on the fixing structure used to secure the color combining component.

[0151] 5 , in this embodiment, the light-emitting structure includes a first light-emitting component 21 and a second light-emitting component 22 .

[0152] The first light-emitting assembly 21 includes: a driving backplane and a first light-emitting element array disposed on the driving backplane; and a support member, on which the driving backplane is disposed.

[0153] In other embodiments, the first light-emitting component may not include the support member.

[0154] The second light-emitting assembly 22 includes: a driving backplane and a second light-emitting element array disposed on the driving backplane; and a support member, on which the driving backplane is disposed.

[0155] In other embodiments, the second light-emitting component may not include the support member.

[0156] The first light-emitting element includes LED, OLED, AMOLED, MiniLED or MicroLED; the second light-emitting element includes LED, OLED, AMOLED, MiniLED or MicroLED.

[0157] In this embodiment, the first light-emitting element includes a MicroLED; the second light-emitting element includes a MicroLED.

[0158] The driving backplane includes an IC backplane or a TFT backplane.

[0159] The support member is used to provide strength support for the driving back plate and the light emitting element array. The material of the support member includes invar steel, aluminum or ceramics and other materials with supporting and heat dissipation functions.

[0160] In other embodiments, the lighting assembly can include no support member.

[0161] In one embodiment, the first light emitting component 21 is configured to emit dual-color light, and the second light emitting component 22 is configured to emit monochromatic light. The dual-color light includes two colors of red, green, and blue, and the monochromatic light includes one color of red, green, and blue except the dual-color light.

[0162] In one embodiment, the first light emitting component 21 is configured to emit monochromatic light, and the second light emitting component 22 is configured to emit bicolor light, wherein the bicolor light includes two colors of red, green, and blue, and the monochromatic light includes one color of red, green, and blue except the bicolor light.

[0163] In this embodiment, the first light-emitting component 21 is fixed to the edge around the first through hole, and the second light-emitting component 22 is fixed to the edge around the fourth through hole.

[0164] In this embodiment, the first surface P1 of the first color combining element 31 faces the second through hole and the fourth through hole, the second surface P2 of the first color combining element 31 faces the first through hole and the third through hole, the third surface P3 of the first part 32 of the second color combining element faces the fourth through hole, the third surface P3 of the second part 33 of the second color combining element faces the third through hole, the fourth surface P4 of the first part 32 of the second color combining element faces the second through hole, and the fourth surface P4 of the second part 33 of the second color combining element faces the first through hole.

[0165] In this embodiment, the included angle between the first color combining element 31 and the first side surface S1 is in a range of 44° to 46°; the included angle between the second color combining element and the fourth side surface S3 is in a range of 44° to 46°.

[0166] The first color combining element 31 is used to transmit the monochromatic light or two-color light emitted by the second light-emitting component 22, and the first color combining element 31 is used to reflect the two-color light or monochromatic light emitted by the first light-emitting component 21; the second color combining element is used to reflect the monochromatic light or two-color light emitted by the second light-emitting component 22, and the second color combining element is used to transmit the two-color light or monochromatic light emitted by the first light-emitting component 21.

[0167] In this embodiment, the optical film includes: a first anti-reflection film located on the first surface P1 of the first color combining element 31, the first anti-reflection film being capable of increasing the transmittance of the monochromatic light or the two-color light emitted by the second light-emitting component 22 through the first color combining element 31; a first reflective film located on the second surface P2 of the first color combining element 31, the first reflective film being capable of increasing the reflectance of the two-color light or the monochromatic light emitted by the first light-emitting component 21 on the second surface P2 of the first color combining element 31; a second reflective film located on at least the third surface P3 of the first portion 32 of the second color combining element, the second reflective film being capable of increasing the reflectance of the monochromatic light or the two-color light emitted by the second light-emitting component 22 on the third surface P3 of the second color combining element; and a second anti-reflection film located on at least the fourth surface P4 of the second portion 33 of the second color combining element, the second anti-reflection film being capable of increasing the transmittance of the two-color light or the monochromatic light emitted by the first light-emitting component 21 through the second color combining element. Thus, the color combining component adjusts the propagation path of the light emitted by the light emitting structure through transmission or reflection, so that the light emitted by the light emitting structure is emitted through the third through hole and enters the optical imaging component 40.

[0168] In this embodiment, the second reflective film is located at least on the third surface P3 of the first part 32 of the second color combining element, that is, the second reflective film is located on the third surface P3 of the first part 32 of the second color combining element, or the second reflective film is located at both the third surface P3 of the first part 32 and the third surface P3 of the second part 33 of the second color combining element; the second anti-reflective film is located at least on the fourth surface P4 of the second part 33 of the second color combining element, that is, the second anti-reflective film is located on the fourth surface P4 of the second part 33 of the second color combining element, or the second anti-reflective film is located at both the fourth surface P4 of the first part 32 and the fourth surface P4 of the second part 33 of the second color combining element.

[0169] Please continue to refer to Figure 5. The light R1 emitted by the first light-emitting component 21 is reflected on the second surface P2 of the first color combining element 31, passes through the second color combining element, and enters the optical imaging component 40 through the third through hole; the light R2 emitted by the second light-emitting component 22 is reflected on the third surface P3 of the second color combining element, passes through the first color combining element 31, and enters the optical imaging component 40 through the third through hole.

[0170] The color combining assembly includes a first color combining element 31 and a second color combining element. The second color combining element includes a first portion 32 and a second portion 33. The first portion 32 and the second portion 33 are respectively fixed to the first surface P1 and the second surface P2 of the first color combining element 31. The first and second color combining elements 31 and 31 are arranged crosswise, facilitating alignment and reducing the occurrence of "ghost images" in the image due to misalignment of the color combining assembly.

[0171] In this embodiment, the optical imaging assembly 40 includes: a housing and at least one lens disposed in the housing.

[0172] In this embodiment, one end of the first color combining element 31 is connected to the edge between the first side surface S1 and the second side surface S2, and the other end of the first color combining element 31 is connected to the edge between the fourth side surface S3 and the third side surface S4; one end of the first portion 32 of the second color combining element is connected to the edge between the first side surface S1 and the third side surface S4, and one end of the second portion 33 of the second color combining element is connected to the edge between the second side surface S2 and the fourth side surface S3.

[0173] In other embodiments, the two ends of the first color-combining element may be connected to other feasible edges of the fixed structure, or the two ends of the first color-combining element may not be connected to the edges of the fixed structure; the two ends of the second color-combining element may be connected to other feasible edges of the fixed structure, or the two ends of the second color-combining element may not be connected to the edges of the fixed structure.

[0174] In other embodiments, one end of the first color combining element 31 is connected to the edge between the second side surface S2 and the fourth side surface S3, and the other end of the first color combining element 31 is connected to the edge between the first side surface S1 and the third side surface S4. One end of the first portion 32 of the second color combining element is connected to the edge between the first side surface S1 and the second side surface S2, and one end of the second portion 33 of the second color combining element is connected to the edge between the fourth side surface S3 and the third side surface S4. Based on the path that light emitted by the first and second light-emitting assemblies 21 and 22 ultimately needs to take to enter the optical imaging assembly 40 through the third through-hole, a reflective layer or an anti-reflection layer is provided on the surfaces of the first and second color combining elements.

[0175] In this embodiment, the rectangular parallelepiped includes a first through-hole extending through the first side surface S1, a second through-hole extending through the second side surface S2, a fourth through-hole extending through the fourth side surface S3, and a third through-hole extending through the third side surface S4. The light-emitting structure includes a first light-emitting component 21 and a second light-emitting component 22. The first light-emitting component 21 is secured to the edge surrounding the first through-hole, and the second light-emitting component 22 is secured to the edge surrounding the fourth through-hole. A light shield is provided in the second through-hole, where the light-emitting component is not secured, to prevent ambient light from entering the color combining component and affecting imaging.

[0176] In other embodiments, a light shielding plate may not be provided in the second through hole where the light-emitting component is not fixed.

[0177] In other embodiments, the first, second, fourth, and third sides of the fixing structure are transparent; the light-emitting structure includes a first light-emitting component and a second light-emitting component, the first light-emitting component being bonded to the first side by optical adhesive, and the second light-emitting component being bonded to the fourth side by optical adhesive, bonding, snap fastening, or the like. A light-shielding layer is provided on the second side surface to which the light-emitting component is not bonded to prevent ambient light from entering the color combining component and affecting imaging.

[0178] The transparent structure includes a flat plate structure, and the material of the transparent structure includes PMMA (Polymethyl Methacrylate) or glass.

[0179] In other embodiments, the second side surface to which the light-emitting component is not bonded may not be provided with a light-shielding layer.

[0180] Correspondingly, an embodiment of the present invention further provides an electronic device, which includes: the optical projection device as described in FIG. 5 and FIG. 8 .

[0181] The electronic device includes a micro projector or a near-eye display device. The micro projector includes a color micro light engine and a projection panel, and the light emitted by the color micro light engine is projected on a transparent panel; the near-eye display device includes AR (Augmented Reality), VR (Virtual Reality), MR (Mediated Reality), etc. The near-eye display device includes a wearable device and a color micro light engine provided on the wearable device, and the light emitted by the color micro light engine can be projected on the wearable device.

[0182] FIG9 is a schematic structural diagram of an optical projection device in another embodiment of the present invention.

[0183] Please refer to Figure 9. The difference between the optical projection device in Figure 9 and the optical projection devices in Figures 5 and 8 is that, in this embodiment, the first light-emitting component 21 is fixed to the first side surface S1, and the second light-emitting component 22 is fixed to the second side surface S2.

[0184] In this embodiment, the first light-emitting component 21 is fixed to the edge around the first through hole, and the second light-emitting component 22 is fixed to the edge around the second through hole; the first surface P1 of the first color combining element 31 faces the second through hole and the fourth through hole, the second surface P2 of the first color combining element 31 faces the first through hole and the third through hole, the third surface P3 of the first part 32 of the second color combining element faces the fourth through hole, the third surface P3 of the second part 33 of the second color combining element faces the third through hole, the fourth surface P4 of the first part 32 of the second color combining element faces the second through hole, and the fourth surface P4 of the second part 33 of the second color combining element faces the first through hole.

[0185] The first color combining element 31 is used to transmit the monochromatic light or two-color light emitted by the second light-emitting component 22, and the first color combining element 31 is used to reflect the two-color light or monochromatic light emitted by the first light-emitting component 21; the second color combining element is used to transmit the monochromatic light or two-color light emitted by the second light-emitting component 22, and the second color combining element is used to transmit the two-color light or monochromatic light emitted by the first light-emitting component 21.

[0186] In this embodiment, the optical film includes: a first antireflection film located on the first surface P1 of the first color combining element 31, capable of increasing the transmittance of the monochromatic or bichromatic light emitted by the second light-emitting component 22 through the first color combining element 31; a first reflective film located on the second surface P2 of the first color combining element 31, capable of increasing the reflectance of the bichromatic or bichromatic light emitted by the first light-emitting component 21 on the second surface P2 of the first color combining element 31; and a second antireflection film located on at least the fourth surface P4 of the second portion 33 of the second color combining element, capable of increasing the transmittance of the bichromatic or bichromatic light emitted by the first light-emitting component 21 through the second color combining element, and increasing the transmittance of the monochromatic or bichromatic light emitted by the second light-emitting component 22 through the second color combining element. Thus, the color combining element adjusts the propagation path of the light emitted by the light-emitting structure through transmission or reflection, so that the light emitted by the light-emitting structure is emitted through the third through hole and enters the optical imaging assembly 40.

[0187] In this embodiment, the second antireflection film is located at least on the fourth surface P4 of the second part 33 of the second color combining element, that is, the second antireflection film is located on the fourth surface P4 of the second part 33 of the second color combining element, or the second antireflection film is located at both the fourth surface P4 of the first part 32 and the fourth surface P4 of the second part 33 of the second color combining element.

[0188] Please continue to refer to Figure 9. The light R1 emitted by the first light-emitting component 21 is reflected on the second surface P2 of the first color-combining element 31, passes through the second color-combining element, and enters the optical imaging component 40 through the third through hole; the light R2 emitted by the second light-emitting component 22 passes through the first color-combining element 31 and the second color-combining element, and enters the optical imaging component 40 through the third through hole.

[0189] In another embodiment, the first light-emitting component is fixed to the second side surface, and the second light-emitting component is fixed to the fourth side surface; the first surface P1 of the first color-combining element faces the second side surface and the fourth side surface, the second surface P2 of the first color-combining element faces the first side surface and the third side surface, the third surface P3 of the first part of the second color-combining element faces the fourth side surface, the third surface P3 of the second part of the second color-combining element faces the third side surface, the fourth surface P4 of the first part of the second color-combining element faces the second side surface, and the fourth surface P4 of the second part of the second color-combining element faces the first side surface; the first color-combining element is used to transmit the two-color light or monochromatic light emitted by the first light-emitting component, and the first color-combining element is used to transmit the two-color light or monochromatic light emitted by the second light-emitting component; the second color-combining element is used to transmit the two-color light or monochromatic light emitted by the first light-emitting component, and the second color-combining element is used to reflect the two-color light or monochromatic light emitted by the second light-emitting component.

[0190] Correspondingly, an embodiment of the present invention further provides an electronic device, which includes: the optical projection device as described in FIG. 9 .

[0191] The electronic device includes a micro projector or a near-eye display device. The micro projector includes a color micro light engine and a projection panel, and the light emitted by the color micro light engine is projected on a transparent panel; the near-eye display device includes AR (Augmented Reality), VR (Virtual Reality), MR (Mediated Reality), etc. The near-eye display device includes a wearable device and a color micro light engine provided on the wearable device, and the light emitted by the color micro light engine can be projected on the wearable device.

[0192] FIG10 is a schematic structural diagram of an optical projection device in another embodiment of the present invention.

[0193] Please refer to Figure 10. The difference between the optical projection device in Figure 10 and the optical projection devices in Figures 5 and 8 is that, in this embodiment, the light-emitting structure includes a first light-emitting component 21, a second light-emitting component 22 and a third light-emitting component 23; the first light-emitting component 21 is fixed to the first side surface S1, the second light-emitting component 22 is fixed to the second side surface S2, and the third light-emitting component 23 is fixed to the fourth side surface S3.

[0194] In this embodiment, the first light-emitting component 21 is used to emit a first monochromatic light, the second light-emitting component 22 is used to emit a second monochromatic light, and the third light-emitting component 23 is used to emit a third monochromatic light. The first monochromatic light, the second monochromatic light and the third monochromatic light respectively include one of the three colors of red, green and blue, and the first monochromatic light, the second monochromatic light and the third monochromatic light are different from each other.

[0195] The first light-emitting assembly 21 includes: a driving backplane and a first light-emitting element array disposed on the driving backplane; and a support member, on which the driving backplane is disposed.

[0196] In other embodiments, the first light-emitting component may not include the support member.

[0197] The second light-emitting assembly 22 includes: a driving backplane and a second light-emitting element array disposed on the driving backplane; and a support member, on which the driving backplane is disposed.

[0198] In other embodiments, the second light-emitting component may not include the support member.

[0199] The third light-emitting assembly 23 includes: a driving backplane and a third light-emitting element array disposed on the driving backplane; and a support member, on which the driving backplane is disposed.

[0200] In other embodiments, the third light-emitting component may not include the support member.

[0201] The first light-emitting element includes LED, OLED, AMOLED, MiniLED or MicroLED; the second light-emitting element includes LED, OLED, AMOLED, MiniLED or MicroLED; the third light-emitting element includes LED, OLED, AMOLED, MiniLED or MicroLED.

[0202] In this embodiment, the first light-emitting element includes a MicroLED; the second light-emitting element includes a MicroLED; and the third light-emitting element includes a MicroLED.

[0203] The driving backplane includes an IC backplane or a TFT backplane.

[0204] The support member is used to provide strength support for the driving back plate and the light emitting element array. The material of the support member includes invar steel, aluminum or ceramics and other materials with supporting and heat dissipation functions.

[0205] In other embodiments, the lighting assembly can include no support member.

[0206] In this embodiment, the first light-emitting component 21 is fixed to the edge around the first through hole, the second light-emitting component 22 is fixed to the edge around the fourth through hole, and the third light-emitting component 23 is fixed to the edge around the first through hole.

[0207] In this embodiment, the first surface P1 of the first color combining element 31 faces the second through hole and the fourth through hole, the second surface P2 of the first color combining element 31 faces the first through hole and the third through hole, the third surface P3 of the first part 32 of the second color combining element faces the fourth through hole, the third surface P3 of the second part 33 of the second color combining element faces the third through hole, the fourth surface P4 of the first part 32 of the second color combining element faces the second through hole, and the fourth surface P4 of the second part 33 of the second color combining element faces the first through hole.

[0208] The first color combining element 31 is used to transmit the second monochromatic light emitted by the second light-emitting component 22, the first color combining element 31 is used to transmit the third monochromatic light emitted by the third light-emitting component 23, and the first color combining element 31 is used to reflect the first monochromatic light emitted by the first light-emitting component 21; the second color combining element is used to reflect the third monochromatic light emitted by the third light-emitting component 23, the second color combining element is used to transmit the first monochromatic light emitted by the first light-emitting component 21, and the second color combining element is used to transmit the second monochromatic light emitted by the second light-emitting component 22.

[0209] In this embodiment, the first light-emitting component 21 is arranged parallel to the first side surface S1, and the first light-emitting component 21 has a first length L1 in a direction parallel to the first side surface S1; the second light-emitting component 22 is arranged parallel to the second side surface S2, and the second light-emitting component 22 has a second length L2 in a direction parallel to the second side surface S2; the third light-emitting component 23 is arranged parallel to the fourth side surface S3, and the third light-emitting component 23 has a third length L3 in a direction parallel to the fourth side surface S3.

[0210] The length range of the second color combining element is greater than The length range of the first color combining element 31 is greater than It should be noted that the second color combining element and the first color combining element are both flat plate structures, and the flat plate structures have a planar extension direction. The length direction of the second color combining element refers to the planar extension direction parallel to the surface of the first fixing part 12, and the length direction of the first color combining element refers to the planar extension direction parallel to the surface of the first fixing part 11.

[0211] The lengths of the second color combining element and the first color combining element 31 can allow the light emitted by the second light-emitting component 22 to pass completely, and can also reflect the light of the first light-emitting component 21 or the third light-emitting component 23, thereby avoiding light loss caused by the flat plate lengths of the second color combining element and the first color combining element 31, thereby affecting the brightness of the light.

[0212] The optical film includes: a first antireflection film located on a first surface P1 of the first color combining element 31, the first antireflection film being capable of increasing the transmittance of the second monochromatic light emitted by the second light-emitting component 22 through the first color combining element 31, and increasing the transmittance of the third monochromatic light emitted by the third light-emitting component 23 through the first color combining element 31; a first reflective film located on a second surface P2 of the first color combining element 31, the first reflective film being capable of increasing the reflectance of the first monochromatic light emitted by the first light-emitting component 21 on the second surface P2 of the first color combining element 31; a second reflective film located on at least a third surface P3 of the first portion 32 of the second color combining element, the second reflective film being capable of increasing the reflectance of the third monochromatic light emitted by the third light-emitting component 23 on the third surface P3 of the second color combining element; and a second antireflection film located on at least a fourth surface P4 of the second portion 33 of the second color combining element, the second antireflection film being capable of increasing the transmittance of the first monochromatic light emitted by the first light-emitting component 21 through the second color combining element, and increasing the transmittance of the second monochromatic light emitted by the second light-emitting component 22 through the second color combining element. Thus, the color combining component adjusts the propagation path of the light emitted by the light emitting structure through transmission or reflection, so that the light emitted by the light emitting structure is emitted through the third through hole and enters the optical imaging component 40.

[0213] In this embodiment, the second reflective film is located at least on the third surface P3 of the first part 32 of the second color combining element, that is, the second reflective film is located on the third surface P3 of the first part 32 of the second color combining element, or the second reflective film is located at both the third surface P3 of the first part 32 and the third surface P3 of the second part 33 of the second color combining element; the second anti-reflective film is located at least on the fourth surface P4 of the second part 33 of the second color combining element, that is, the second anti-reflective film is located on the fourth surface P4 of the second part 33 of the second color combining element, or the second anti-reflective film is located at both the fourth surface P4 of the first part 32 and the fourth surface P4 of the second part 33 of the second color combining element.

[0214] Please continue to refer to Figure 10. The light R1 emitted by the first light-emitting component 21 is reflected on the second surface P2 of the first color-combining element 31, passes through the second color-combining element, and enters the optical imaging component 40 through the third through hole; the light R2 emitted by the second light-emitting component 22 passes through the first color-combining element 31 and the second color-combining element, and enters the optical imaging component 40 through the third through hole; the light R3 emitted by the third light-emitting component 23 is reflected on the third surface P3 of the second color-combining element, passes through the first color-combining element 31, and enters the optical imaging component 40 through the third through hole.

[0215] Correspondingly, an embodiment of the present invention further provides an electronic device, which includes: the optical projection device as described in FIG. 9 .

[0216] The electronic device includes a micro projector or a near-eye display device. The micro projector includes a color micro light engine and a projection panel, and the light emitted by the color micro light engine is projected on a transparent panel; the near-eye display device includes AR (Augmented Reality), VR (Virtual Reality), MR (Mediated Reality), etc. The near-eye display device includes a wearable device and a color micro light engine provided on the wearable device, and the light emitted by the color micro light engine can be projected on the wearable device.

[0217] The first light-emitting element, the second light-emitting element and the third light-emitting element described in the above embodiments may be Micro LEDs (abbreviated as “micro display panels”).

[0218] The micro display panel has a very small volume, and the length and width dimensions are between 500μm and 50,000μm. The area of ​​the light-emitting region of the above-mentioned micro display panel is very small, such as 1mm×1mm, 2.64mm×2.02mm, 3mm×5mm, etc. The light-emitting region of the above-mentioned micro display panel includes a plurality of micro LED pixels arranged in an array, and the specific pixel arrangement can be one of 320×240, 640×480, 1600×1200, 1920×1080, and 2560×1440. The size of a single micro LED pixel is between 100nm and 100μm. In some embodiments, the size of a single micro LED pixel is between 150nm and 15μm. In some embodiments, the size of a single micro LED pixel can also be less than 10μm.

[0219] A driver backplane is located behind the micro-LED pixel array. It is electrically connected to the micro-LEDs within the array and receives signals such as image data from the outside world, controlling the corresponding micro-LEDs to illuminate or not illuminate. The driver backplane is typically a TFT (Thin Film Transistor) board or an IC (Integrated Circuit) board.

[0220] For example, the driving backplane of the above-mentioned micro display panel integrates a frame buffer, a column driving circuit, and a row driving circuit. The frame buffer includes a first pixel storage area, and the micro LED pixel array includes a second pixel storage area. A complete frame of pixel grayscale data from the outside world can first enter the first pixel storage area of ​​the frame buffer, and the column driving circuit can load the pixel grayscale data in the first pixel storage area of ​​the frame buffer into the second pixel storage area of ​​the micro LED pixel array. The row driving circuit can scan the pixel grayscale data in the second pixel storage area and generate a pulse modulation signal to achieve the purpose of displaying different grayscales. When driving multiple micro LED pixels in the micro LED pixel array, it is possible to adopt a single pixel independent driving method or a multiple pixel unit independent driving method. The specific driving method should not constitute a limitation to the present invention.

[0221] It should be noted that the application of the above-mentioned micro display panel to the light-emitting element of the present invention should not constitute a limitation on the application of the present invention.

[0222] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. An optical projection device, characterized in that: include: a fixing structure, the fixing structure comprising at least a first side surface, a second side surface, and a third side surface, the second side surface and the third side surface being opposite to each other, the first side surface and the second side surface being used to provide an injection port for light, and the third side surface being used to provide an injection port for light; A light-emitting structure fixed to a side surface of the fixing structure, wherein the light-emitting structure is fixed to the first side surface and the second side surface, and the light-emitting structure includes at least two light-emitting components, with one light-emitting component fixed to each side surface; A color combining component fixed to the fixed structure, the color combining component is a flat plate structure, the surface of the color combining component includes an optical film, the optical film is used to adjust the propagation path of the light emitted by the light-emitting structure through transmission, reflection or a combination of transmission and reflection, so that the light emitted by the light-emitting structure is emitted through the third side.

2. The optical projection device according to claim 1, wherein: The color combining component includes a first color combining element. The first color combining element is a flat plate structure. The first color combining element includes a first surface and a second surface that are opposite to each other.

3. The optical projection device according to claim 2, wherein: The light-emitting structure includes a first light-emitting component and a second light-emitting component; the first light-emitting component is used to emit two-color light, and the second light-emitting component is used to emit monochromatic light, or the first light-emitting component is used to emit monochromatic light, and the second light-emitting component is used to emit two-color light, the two-color light includes two colors of red, green and blue, and the monochromatic light includes one color of red, green and blue except the two-color light.

4. The optical projection device according to claim 3, wherein: The first light-emitting component is fixed to the first side surface, and the second light-emitting component is fixed to the second side surface; the first surface of the first color-combining element faces the second side surface, and the second surface of the first color-combining element faces the first side surface and the third side surface. The first color-combining element is used to transmit the two-color light or monochromatic light emitted by the second light-emitting component, and the first color-combining element is used to reflect the monochromatic light or two-color light emitted by the first light-emitting component.

5. The optical projection device according to claim 3, wherein: The fixing structure also includes a fourth side surface, the first side surface and the fourth side surface are opposite to each other, the first light-emitting component is fixed to the second side surface, and the second light-emitting component is fixed to the fourth side surface; the first surface of the first color-combining element faces the first and second side surfaces, and the second surface of the first color-combining element faces the third and fourth side surfaces, the first color-combining element is used to transmit the two-color light or monochromatic light emitted by the first light-emitting component, and the first color-combining element is used to reflect the monochromatic light or two-color light emitted by the second light-emitting component.

6. The optical projection device according to claim 4 or 5, characterized in that: The optical film includes: an anti-reflection film located on the first surface of the first color combining element; and a reflective film located on the second surface of the first color combining element.

7. The optical projection device according to claim 2, wherein: The parallelism between the first surface and the second surface of the first color combining element is less than 1°.

8. The optical projection device according to claim 2, wherein: The thickness of the first color-combining element ranges from 0.11 mm to 1.0 mm.

9. The optical projection device according to claim 1, wherein: The color combining component includes a first color combining element and a second color combining element; the first color combining element is a flat plate structure, including a first and a second opposite surface; the second color combining element is a flat plate structure, including a third and a fourth opposite surface, and the second color combining element includes a first part and a second part, the first part and the second part are respectively fixed to the first and second surfaces of the first color combining element, and the length directions of the first part and the second part intersect with the length direction of the first color combining element, and the length direction is the plane extension direction of the flat plate structure parallel to the bottom surface of the fixed structure.

10. The optical projection device according to claim 9, wherein: The light-emitting structure includes a first light-emitting component and a second light-emitting component; the first light-emitting component is used to emit two-color light, and the second light-emitting component is used to emit monochromatic light, or the first light-emitting component is used to emit monochromatic light, and the second light-emitting component is used to emit two-color light, the two-color light includes two colors of red, green and blue, and the monochromatic light includes one color of red, green and blue except the two-color light.

11. The optical projection device according to claim 10, wherein: The fixing structure also includes a fourth side surface, the first side surface and the fourth side surface are opposite to each other, the first light-emitting component is fixed to the first side surface, and the second light-emitting component is fixed to the fourth side surface; the first surface of the first color-combining element faces the second side surface and the fourth side surface, the second surface of the first color-combining element faces the first side surface and the third side surface, the third surface of the first part of the second color-combining element faces the fourth side surface, the third surface of the second part of the second color-combining element faces the third side surface, the fourth surface of the first part of the second color-combining element faces the second side surface, and the fourth surface of the second part of the second color-combining element faces the first side surface; the first color-combining element is used to transmit the monochromatic light or the two-color light emitted by the second light-emitting component, and the first color-combining element is used to reflect the two-color light or the monochromatic light emitted by the first light-emitting component; the first part of the second color-combining element is used to reflect the monochromatic light or the two-color light emitted by the second light-emitting component, and the second part of the second color-combining element is used to transmit the two-color light or the monochromatic light emitted by the first light-emitting component.

12. The optical projection device according to claim 11, wherein: The optical film includes: a first anti-reflection film located on the first surface of the first color combining element; a first reflective film located on the second surface of the first color combining element; a second reflective film located on at least the third surface of the first portion of the second color combining element; and a second anti-reflection film located on at least the fourth surface of the second portion of the second color combining element.

13. The optical projection device according to claim 10, wherein: The first light-emitting component is fixed to the first side surface, and the second light-emitting component is fixed to the second side surface; the first surface of the first color-combining element faces the second side surface, the second surface of the first color-combining element faces the first side surface and the third side surface, the third surface of the second part of the second color-combining element faces the third side surface, the fourth surface of the first part of the second color-combining element faces the second side surface, and the fourth surface of the second part of the second color-combining element faces the first side surface; the first color-combining element is used to transmit the monochromatic light or two-color light emitted by the second light-emitting component, and the first color-combining element is used to reflect the two-color light or monochromatic light emitted by the first light-emitting component; the second color-combining element is used to transmit the monochromatic light or two-color light emitted by the second light-emitting component, and the second color-combining element is used to transmit the two-color light or monochromatic light emitted by the first light-emitting component.

14. The optical projection device according to claim 11, wherein: The included angle between the first color combining element and the first side surface is in a range of 44° to 46°; the included angle between the second color combining element and the fourth side surface is in a range of 44° to 46°.

15. The optical projection device according to claim 10, wherein: The fixing structure also includes a fourth side surface, the first side surface and the fourth side surface are opposite to each other, the first light-emitting component is fixed to the second side surface, and the second light-emitting component is fixed to the fourth side surface; the first surface of the first color-combining element faces the second side surface and the fourth side surface, the second surface of the first color-combining element faces the first side surface and the third side surface, the third surface of the first part of the second color-combining element faces the fourth side surface, the third surface of the second part of the second color-combining element faces the third side surface, the fourth surface of the first part of the second color-combining element faces the second side surface, and the fourth surface of the second part of the second color-combining element faces the first side surface; the first color-combining element is used to transmit the two-color light or monochromatic light emitted by the first light-emitting component, the first color-combining element is used to transmit the two-color light or monochromatic light emitted by the second light-emitting component; the second color-combining element is used to transmit the two-color light or monochromatic light emitted by the first light-emitting component, and the second color-combining element is used to reflect the two-color light or monochromatic light emitted by the second light-emitting component.

16. The optical projection device according to claim 9, wherein: The fixed structure also includes a fourth side surface, and the first side surface and the fourth side surface are opposite to each other; the light-emitting structure includes a first light-emitting component, a second light-emitting component and a third light-emitting component; the first light-emitting component is used to emit a first monochromatic light, the second light-emitting component is used to emit a second monochromatic light, and the third light-emitting component is used to emit a third monochromatic light, the first monochromatic light, the second monochromatic light and the third monochromatic light respectively include one of the three colors of red, green and blue, and the first monochromatic light, the second monochromatic light and the third monochromatic light are different from each other.

17. The optical projection device according to claim 16, wherein: The first light-emitting component is fixed to the first side surface, the second light-emitting component is fixed to the second side surface, and the third light-emitting component is fixed to the fourth side surface; the first surface of the first color-combining element faces the second side surface and the fourth side surface, the second surface of the first color-combining element faces the first side surface and the third side surface, the third surface of the first part of the second color-combining element faces the fourth side surface, the third surface of the second part of the second color-combining element faces the third side surface, the fourth surface of the first part of the second color-combining element faces the second side surface, and the fourth surface of the second part of the second color-combining element faces the first side surface; the first color-combining element is used to transmit the second monochromatic light emitted by the second light-emitting component, the first color-combining element is used to transmit the third monochromatic light emitted by the third light-emitting component, and the first color-combining element is used to reflect the first monochromatic light emitted by the first light-emitting component; the second color-combining element is used to reflect the third monochromatic light emitted by the third light-emitting component, the second color-combining element is used to transmit the first monochromatic light emitted by the first light-emitting component, and the second color-combining element is used to transmit the second monochromatic light emitted by the second light-emitting component.

18. The optical projection device according to claim 17, wherein: The optical film further includes: a first anti-reflection film located on the first surface of the first color combining element; a first reflective film located on the second surface of the first color combining element; a second reflective film located on at least the third surface of the first portion of the second color combining element; and a second anti-reflection film located on at least the fourth surface of the second portion of the second color combining element.

19. The optical projection device according to claim 17, wherein: The first light-emitting component has a first length in a direction parallel to the first side, the second light-emitting component has a second length in a direction parallel to the second side, the third light-emitting component has a third length in a direction parallel to the fourth side S3, and the length range of the second color-combining element is greater than The length range of the first color combining element is greater than Among them, L1 is the first length, L2 is the second length, L3 is the third length, the length direction of the second color-combining element is the planar extension direction of the flat plate structure parallel to the bottom surface of the fixed structure, and the length direction of the first color-combining element is the planar extension direction of the flat plate structure parallel to the bottom surface of the fixed structure.

20. The optical projection device according to claim 9, wherein: The parallelism between the first surface and the second surface of the first color-combining element is less than 1°; the parallelism between the third surface and the fourth surface of the second color-combining element is less than 1°.

21. The optical projection device according to claim 9, wherein: The thickness of the first color-combining element ranges from 0.11 mm to 1.0 mm; the thickness of the first part ranges from 0.11 mm to 1.0 mm; and the thickness of the second part ranges from 0.11 mm to 1.0 mm.

22. The optical projection device according to claim 1, wherein: The fixing structure further includes a first fixing portion, and the first side surface, the second side surface and the third side surface are arranged on the first fixing portion.

23. The optical projection device according to claim 22, wherein: The fixing structure further includes a second fixing portion opposite to the first fixing portion, and the first side surface, the second side surface and the third side surface are arranged between the second fixing portion and the first fixing portion and are connected to the second fixing portion and the first fixing portion respectively.

24. The optical projection device according to claim 22, wherein: The shape of the fixing structure includes a cuboid or a polygonal column.

25. The optical projection device according to claim 22, wherein: The first fixing portion includes a flat surface or a convex surface.

26. The optical projection device according to claim 1, wherein: The fixing structure includes a first through hole passing through the first side surface, a second through hole passing through the second side surface, and a third through hole passing through the third side surface, the second through hole and the third through hole are opposite to each other, and the adjacent first through holes, second through holes and third through holes are isolated from each other by the edges of the fixing structure, or the adjacent first through holes, second through holes and third through holes are connected; the light-emitting structure is fixed to the edges around the through holes.

27. The optical projection device according to claim 26, wherein: The fixing structure further includes a fourth side surface, the first side surface and the fourth side surface are opposite to each other, the fixing structure further includes a fourth through hole passing through the fourth side surface, and the fixing structure further includes: a light shielding plate arranged in the through hole where the light emitting structure is not fixed.

28. The optical projection device according to claim 1, wherein: The first side surface, the second side surface and the third side surface are transparent structures.

29. The optical projection device according to claim 28, wherein: The fixed structure also includes a fourth side surface, the first side surface and the fourth side surface are opposite to each other, the light-emitting structure is fixed to at least two of the first side surface, the second side surface and the fourth side surface, and the fixed structure also includes: a light-shielding layer arranged on the side surface of the unfixed light-emitting structure.

30. The optical projection device according to claim 1, wherein: Also includes: An optical imaging component fixed to the third side surface of the fixed structure is used to receive the light emitted from the light-emitting structure through the third side surface and emit the processed light for imaging.

31. The optical projection device according to claim 30, wherein: The light-emitting assembly comprises: a driving backplane and a light-emitting element array arranged on the driving backplane; and a supporting member, on which the driving backplane is arranged.

32. An electronic device, characterized in that: include: The optical projection device according to any one of claims 1 to 31.

Images