Micro-projection optical engine and electronic device

Abstract

A micro-projection optical engine and an electronic device. The micro-projection optical engine comprises: a light combining assembly, which is provided with at least one light-entering surface and a light-exiting surface; a lens assembly, wherein the lens assembly and the light-exiting surface of the light combining assembly are fixedly arranged opposite each other; and at least one micro-display panel, wherein the micro-display panel comprises a display section, the display section of the at least one micro-display panel being arranged opposite the at least one light-entering surface of the light combining assembly; light emitted by the display section of the at least one micro-display panel can enter the light combining assembly through the light-entering surface and exit through the light-exiting surface.

Description

Micro-projection optical machine and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on February 21, 2024, with application number 2024101951309 and invention name “A micro-projection optical machine 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 display, and in particular to a micro-projection optical machine and electronic equipment. Background Art

[0003] In recent years, with the continuous development of Micro LED (Micro Light Emitting Diode Display) technology, more and more electronic devices have begun to use Micro LED technology, bringing great convenience to people's lives.

[0004] Currently, in actual applications, micro-display panels composed of Micro LEDs usually need to be assembled with lenses and other structures to form an optical machine (or light engine) structure. How to solve the problem of assembling micro-display panels with lenses and other structures is one of the urgent problems to be solved;

[0005] Furthermore, with the miniaturization of electronic devices, the miniaturization of the optical-mechanical structure of micro-projection optical engines has also become one of its trends. Especially in wearable electronic devices, miniaturization and lightweighting of micro-projection optical engines are also one of the issues that need to be solved urgently.

[0006] Summary of the Invention

[0007] In order to solve the above technical problems, the present application provides a micro-projection optical machine and electronic equipment.

[0008] According to one aspect of the present application, the present application provides a micro-projection optical engine, comprising:

[0009] A light combining component, the light combining component having at least a light incident surface and a light emitting surface;

[0010] A mounting frame having a mounting space therein, a side of the mounting space having at least one light entrance opening and a light exit opening communicated with the mounting space, the light combining assembly being mounted in the mounting space, the at least one light entrance surface corresponding to the at least one light entrance opening, and the light exit surface corresponding to the light exit opening;

[0011] At least one micro-display panel, the micro-display panel including a display segment, the display segment of the micro-display panel being fixed at the light entrance opening of the mounting frame, the light emitted by the display segment of the at least one micro-display panel being able to enter the light combining component through the light entrance surface and be emitted through the light exit surface.

[0012] In some embodiments, the display segment includes a display chip and a chip reinforcement plate, the display chip is fixed to the surface of the chip reinforcement plate, the size of the light entrance opening is adapted to the size of the display chip, and the display chip is installed in the light entrance opening of the mounting frame.

[0013] In some embodiments, the chip reinforcement plate has a size larger than that of the display chip, and a portion of the chip reinforcement plate that extends beyond the display chip is located outside the mounting frame.

[0014] In some embodiments, adhesive is filled between a portion of the chip reinforcement plate extending beyond the display chip and the mounting frame.

[0015] In some embodiments, the light incident opening includes a first opening segment and a second opening segment, and a width of the first opening segment is greater than a width of the second opening segment.

[0016] In some embodiments, the display segment further includes a power connection segment, in which the display chip is electrically connected to the circuit board, and the width of the power connection segment is greater than the width of the display chip; the power connection segment is installed in the first opening segment, and the display chip is installed in the second opening segment.

[0017] In some embodiments, at least one side surface of the mounting frame has at least one fixing position, and the fixing position is suitable for abutting and positioning with an external fixing fixture.

[0018] In some embodiments, the fixing portion has at least one groove.

[0019] In some embodiments, the installation frame includes a first fixing position and a second fixing position, and the planes where the first fixing position and the second fixing position are located are arranged opposite to each other.

[0020] In some embodiments, the shape of the groove includes at least one of an I-shape, an oval shape, and a square shape.

[0021] In some embodiments, at least one side surface of the mounting frame has at least one injection hole, and the gap between the mounting frame and the light combining assembly is connected to the injection hole.

[0022] In some embodiments, at least one of the injection holes and at least one of the fixing positions are located on the same surface of the mounting frame.

[0023] In some embodiments, the size of the light outlet is larger than the size of the light combining assembly, and the size of the light combining assembly is larger than the size of the light entrance.

[0024] In some embodiments, the micro-projection optical engine further includes a lens assembly, and the lens assembly is fixed to the light outlet of the mounting frame.

[0025] In some embodiments, the micro display panel further includes a circuit board and a connector segment, wherein one end of the circuit board is electrically connected to the display segment, and the other end of the circuit board is electrically connected to the connector segment.

[0026] In some embodiments, the at least one micro display panel includes a first micro display panel and at least two second micro display panels;

[0027] The connector section of the first micro display panel includes at least two first connectors located on the same side;

[0028] The connector segment of the second micro display panel includes a second connector;

[0029] At least two second connectors of the second micro display panel are connected to at least two first connectors of the first micro display panel in a one-to-one correspondence.

[0030] In some embodiments, the connector segments of at least two of the second micro display panels are located in the same plane.

[0031] In some embodiments, the distance between the connector segments of at least two of the second micro display panels and the connector segment of the first micro display panel is the same.

[0032] In some embodiments, the connector segments of at least two of the second micro display panels are arranged in parallel.

[0033] In some embodiments, the plurality of connector segments of the plurality of micro display panels are stacked with the light combining assembly.

[0034] In some embodiments, the plurality of connector segments of the plurality of micro display panels are stacked and disposed on a side of the display segment of the first micro display panel away from the light combining assembly.

[0035] In some embodiments, the plurality of connector segments of the plurality of micro display panels are not stacked with the light combining assembly.

[0036] In some embodiments, at least a portion of at least two circuit boards of at least two second micro display panels are located outside a same side of the light combining assembly.

[0037] In some embodiments, at least a portion of at least two of the circuit boards of at least two of the second micro display panels are stacked.

[0038] In some embodiments, at least two of the circuit boards of at least two of the second micro display panels are staggered.

[0039] In some embodiments, the circuit board is a flexible circuit board.

[0040] In some embodiments, the circuit board of the first micro display panel is in a strip shape; and the circuit board of the second micro display panel is in an L shape.

[0041] In some embodiments, the first micro display panel further includes an external connector, and the external connector and the at least two first connectors are located on different and opposite surfaces of the first micro display panel.

[0042] In some embodiments, a preset electronic component is disposed at a preset position on the surface of the first micro display panel where the external connector is disposed.

[0043] In some embodiments, the electronic components include capacitors and resistors.

[0044] In some embodiments, the first micro-display panel emits green light, and the number of the second micro-display panels is two, one of the second micro-display panels emits red light, and the other second micro-display panel emits blue light.

[0045] According to another aspect of the present application, a micro-projection optical engine is further provided, comprising:

[0046] A light combining component, the light combining component having at least a light incident surface and a light emitting surface;

[0047] A lens assembly, wherein the lens assembly is fixedly arranged relative to the light-emitting surface of the light-combining assembly;

[0048] At least one micro-display panel, the micro-display panel including a display segment, the display segment of the at least one micro-display panel being arranged opposite to the at least one light incident surface of the light combining component, and the light emitted by the display segment of the at least one micro-display panel being able to enter the light combining component through the light incident surface and be emitted through the light emitting surface.

[0049] In some embodiments, the lens assembly includes a lens housing, the lens housing includes a light input end and a light output end, the light input end has a mounting groove, and one end of the light combining assembly having the light output surface is fixed in the mounting groove.

[0050] In some embodiments, the light incident end of the lens assembly has an inclined surface connected to the side wall of the mounting groove.

[0051] In some embodiments, at least one semi-transparent and semi-reflective film is provided in the light combining component, and a preset distance is provided between the edge of the semi-transparent and semi-reflective film and the light emitting surface of the light combining component, and the preset distance is smaller than the depth of the mounting groove.

[0052] In some embodiments, the preset distance ranges from 0.5 mm to 1 mm.

[0053] In some embodiments, the display segments of the at least one micro display panel are fixed to the at least one light incident surface via adhesive.

[0054] According to another aspect of the present application, the present application further provides an electronic device, comprising any of the micro-projection optical engines described above.

[0055] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0056] In the technical solution of the present invention, at least two second connectors of the second micro-display panel are coplanar and located parallel to the surface of the connection reinforcement plate of the first micro-display panel. The coplanar arrangement of at least two second connectors and their parallel surfaces to the connection reinforcement plate reduces the combined thickness of the connected second connectors and the first connector, helping to control the volume of the micro-projection engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0058] FIG1 is a schematic diagram of a three-dimensional structure of a micro-projection optical machine according to an embodiment of the present invention from one viewing angle;

[0059] FIG2 is a schematic diagram of the three-dimensional structure of the micro-projection optical engine embodiment shown in FIG1 from another perspective;

[0060] FIG3 is an exploded schematic diagram of the micro-projection optical engine embodiment shown in FIG1 from a first viewing angle;

[0061] FIG4 is an exploded schematic diagram of the embodiment of the micro-projection optical engine shown in FIG1 from another perspective;

[0062] FIG5 is a front view of the embodiment of the micro-projection optical engine shown in FIG1 ;

[0063] FIG6 is a top view of the embodiment of the micro-projection optical engine shown in FIG1 ;

[0064] FIG7 is a bottom view of the embodiment of the micro-projection optical engine shown in FIG1 ;

[0065] FIG8 is a left side view of the embodiment of the micro-projection optical engine shown in FIG1;

[0066] FIG9 is a schematic structural diagram of a lens assembly and a mounting frame of the micro-projection optical engine embodiment shown in FIG1 ;

[0067] FIG10 is a schematic structural diagram of another state of the embodiment of the micro-projection optical engine shown in FIG1;

[0068] FIG11 is a schematic diagram of the optical path of the embodiment of the micro-projection optical machine shown in FIG1 ;

[0069] FIG12 is a top view of the structure of one side of the first micro display panel in the micro projection optical engine embodiment shown in FIG1;

[0070] FIG13 is a top view of the structure of the other side of the first micro display panel in the micro projection optical engine embodiment shown in FIG1;

[0071] FIG14 is a top view of a second micro-display panel in the embodiment of the micro-projection optical engine shown in FIG1 ;

[0072] FIG15 is a top view of the other side of a second micro display panel in the micro-projection optical engine embodiment shown in FIG1 ;

[0073] FIG16 is a top view of a second micro display panel in the embodiment of the micro projection optical engine shown in FIG1 ;

[0074] FIG17 is a top view of the structure of the other side of a second micro display panel in the micro-projection optical engine embodiment shown in FIG1 ;

[0075] FIG18 is a schematic diagram of the three-dimensional structure of another embodiment of the micro-projection optical engine of the present invention from one viewing angle;

[0076] FIG19 is an exploded view of the micro-projection optical machine shown in FIG18 from one perspective;

[0077] FIG20 is an exploded schematic diagram of the micro-projection optical machine shown in FIG18 from another perspective;

[0078] FIG21 is a schematic diagram of the top view of the light combining component of the micro-projection optical machine shown in FIG18 . DETAILED DESCRIPTION

[0079] In order to make the above-mentioned objects, features and advantages 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.

[0080] 1 to 17 , there are shown schematic three-dimensional structural diagrams of an embodiment of a micro-projection optical engine according to the present invention.

[0081] The micro-projection optical engine includes a light combining assembly 130 and multiple micro-display panels. Light emitted by the multiple micro-display panels is combined by the light combining assembly 130 to form projected light. The micro-display panel includes a display segment, a circuit board, and a connector segment. One end of the circuit board is electrically connected to the display segment, and the other end is electrically connected to the connector segment. The display segment includes a display chip and a chip reinforcement plate, with the display chip fixed to the surface of the chip reinforcement plate. The connector segment includes a connector and a connection reinforcement plate, with the connector fixed to the surface of the connection reinforcement plate.

[0082] The multiple micro display panels include a first micro display panel 110 and at least two second micro display panels (120a, 120b); as shown in Figures 12 and 13, the first micro display panel 110 also includes: at least two first connectors (116a, 116b), and at least two of the first connectors (116a, 116b) are fixed to one side surface of the connection reinforcement plate 115 of the first micro display panel 110.

[0083] As shown in Figures 14 to 17, the second micro display panels (120a, 120b) further include: second connectors (126a, 126b), the second connectors (126a, 126b) being fixed to one side surface of the connection reinforcement plates (125a, 125b) of the second micro display panels (120a, 120b); the at least two second connectors (126a, 126b) of at least two second micro display panels (120a, 120b) being connected to the at least two first connectors (116a, 116b) of the first micro display panel 110 in a one-to-one correspondence. The second connectors (126a, 126b) of the at least two second micro display panels (120a, 120b) are coplanarly arranged, and the planes of the second connectors (126a, 126b) of the at least two second micro display panels (120a, 120b) are parallel to the surface of the connection reinforcement plate 115 of the first micro display panel 110.

[0084] With reference to Figures 1 and 2, in some embodiments, the connector segments of the at least two second micro-display panels (120a, 120b) are located in the same plane. In some embodiments, the connector segments of the at least two second micro-display panels (120a, 120b) are equidistant from the connector segments of the first micro-display panel 110. In some embodiments, the connector segments of the at least two second micro-display panels (120a, 120b) are arranged side by side.

[0085] 1 and 2 , in some embodiments, the connector segments of the plurality of microdisplay panels are stacked with the light combining assembly 130. In some embodiments, the connector segments of the plurality of microdisplay panels are stacked on a side of the first microdisplay panel 110 away from the light combining assembly 130. In some embodiments, the connector segments of the plurality of microdisplay panels can also be stacked on a side of the light combining assembly 130 where no microdisplay panels are located.

[0086] With reference to FIG10 , in some embodiments, the connector segments of the plurality of microdisplay panels are not stacked with the light combining assembly 130. With reference to FIG10 , the angle between the plane where the connector segments of the plurality of microdisplay panels are located and the display segments of the first microdisplay panel 110 is approximately 90°. In some embodiments, because the circuit board is a flexible circuit board, the angle between the plane where the connector segments of the plurality of microdisplay panels are located and the display segments of the first microdisplay panel 110 can be adjusted according to usage needs.

[0087] The micro display panel is configured to generate light for projection, wherein the display chip of the micro display panel can generate light for projection display, and the chip reinforcement plate can provide mechanical support for the display chip.

[0088] In some embodiments of the present invention, the display chip includes a Micro LED array, the micro display panel is a Micro LED panel, and the display chip is fixed to a surface of the chip reinforcement plate.

[0089] The display chip has a length and width ranging from 500 μm to 50,000 μm. The display chip has a light-emitting area. The light-emitting area of ​​the display chip has an area ranging from 0.5 inches to 3 inches, for example, 1 mm×1 mm, 2.64 mm×2.02 mm, 3 mm×5 mm, etc.

[0090] The Micro LED array is located in the light-emitting area of ​​the display chip. In the Micro LED array, the pixel arrangement can be one of 320×240, 640×480, 1600×1200, 1920×1080, and 2560×1440. In some embodiments, the size of a single pixel in the Micro LED array is between 100 nm and 100 μm. In some implementations, the size of a single pixel in the Micro LED array is between 150 nm and 15 μm. In some implementations, the size of a single pixel in the Micro LED array can be less than 10 μm.

[0091] In some embodiments as shown in Figures 1 to 17, among the multiple micro display panels, one micro display panel is a first micro display panel 110 (as shown in Figures 12 and 13), and two micro display panels are second micro display panels (120a, 120b) (as shown in Figures 14 to 17). In some embodiments, the three micro display panels are all monochrome micro display panels. For example, the three micro display panels are a red micro display panel, a blue micro display panel, and a green micro display panel. For example, the first micro display panel 110 can be a red micro display panel, the second micro display panel 120a can be a blue micro display panel, and the second micro display panel 120b can be a green micro display panel.

[0092] As shown in Figures 12 and 13 , the display chip 111 of the first micro display panel 110 is a red display chip. The display chip 111 of the first micro display panel 110 generates red light. The display chip 111 of the first micro display panel 110 is fixed to one surface of the chip reinforcement plate 114 of the first micro display panel 110.

[0093] The first micro-display panel 110 includes at least two first connectors (116a, 116b). The first connectors (116a, 116b) can be electrically connected to other micro-display panels in the micro-projection optical machine. Specifically, in the embodiments shown in Figures 1 to 10, the first connectors (116a, 116b) can be electrically connected to the second micro-display panels (120a, 120b).

[0094] The number of the first connectors (116a, 116b) is adapted to the number of the second micro display panels (120a, 120b). The at least two first connectors (116a, 116b) of the first micro display panel 110 correspond one-to-one to the at least two second micro display panels (120a, 120b), and can be electrically connected to the at least two second micro display panels (120a, 120b).

[0095] The connection reinforcement plate 115 of the first micro display panel 110 can provide mechanical support for at least two first connectors (116a, 116b). The at least two first connectors (116a, 116b) are fixed to one surface of the connection reinforcement plate 115 of the first micro display panel 110.

[0096] In some embodiments as shown in FIG. 12 , the surface of the connection reinforcement plate 115 where the at least two first connectors ( 116 a , 116 b ) are located is located on the same side as the surface of the chip reinforcement plate 114 where the display chip 111 is located.

[0097] As shown in FIG. 13 , in some embodiments of the present invention, the first micro display panel 110 further includes an external connector 117 . The external connector 117 is fixed to the other side surface of the connection reinforcement plate 115 of the first micro display panel 110 .

[0098] The external connector 117 can electrically connect the first micro display panel 110 and an external circuit to achieve power supply and signal transmission for the entire micro projection engine.

[0099] As shown in Figures 12 and 13, the external connector 117 and the first connectors (116a, 116b) are disposed opposite each other and are respectively fixed to two surfaces of the connection reinforcement plate 115 of the first micro display panel 110. The surface of the connection reinforcement plate 115 of the first micro display panel 110 on which the external connector 117 is located is located on opposite sides from the surface of the chip reinforcement plate 114 on which the display chip 111 is located.

[0100] As shown in FIG13 , in some embodiments, electronic components (as indicated by blocks of different sizes in FIG13 ) are further secured to the connection reinforcement plate 115. The electronic components and the external connector 117 are secured to the same surface of the connection reinforcement plate 115 of the first micro display panel 110. The electronic components 117 include capacitors and resistors.

[0101] The circuit board 112 of the first micro display panel 110 can be electrically connected to the display chip 111 of the first micro display panel 110 and the first connector 115 and the external connector 117. Specifically, one end of the circuit board 112 of the first micro display panel 110 is electrically connected to the display chip 111 of the first micro display panel 110; and the other end of the circuit board 112 of the first micro display panel 110 is electrically connected to the first connector 115 and the external connector 117.

[0102] In some embodiments of the present invention, the circuit board 112 of the first micro display panel 110 is a flexible circuit board to flexibly adjust the relative positions of the chip reinforcement plate 114 and the connection reinforcement plate 115 of the first micro display panel 110 .

[0103] In some embodiments, the circuit board 112 of the first micro display panel 111 is in a strip shape and extends along the line connecting the chip reinforcement plate 114 and the connection reinforcement plate 115 of the first micro display panel 110 .

[0104] As shown in Figures 14 and 15 , the second micro-display panel 120a is a blue micro-display panel. The display chip 121a of the second micro-display panel 120a generates blue light. The display chip 121a of the second micro-display panel 120a is fixed to one surface of the chip reinforcement plate 124a of the second micro-display panel 120a. As shown in Figures 16 and 17 , the second micro-display panel 120b is a green micro-display panel. The display chip 121b of the second micro-display panel 120b generates blue light. The display chip 121b of the second micro-display panel 120b is fixed to one surface of the chip reinforcement plate 124b of the second micro-display panel 120b.

[0105] The second micro display panel (120a, 120b) includes a second connector (126a, 126b). The second connector (126a, 126b) can be electrically connected to the first micro display panel 110 to electrically connect to an external circuit through the first micro display panel 110, thereby achieving power supply and signal transmission.

[0106] Specifically, in the embodiments shown in Figures 1 to 10, the second connectors (126a, 126b) are plugged into and matched with the first connector 110. The second connectors (126a, 126b) of different second micro display panels (120a, 120b) are correspondingly plugged into and matched with different first connectors (116a, 116b) in the first micro display panel 110. Any second micro display panel (120a, 120b) has one second connector (126a, 126b), which is plugged into and matched with one first connector (116a, 116b) on the first micro display panel 110.

[0107] The connection reinforcement plate 125a of the second microdisplay panel 120a can provide mechanical support for the second connector 126a of the second microdisplay panel 120a. The second connector 126a of the second microdisplay panel 120a is located on one surface of the connection reinforcement plate 125a of the second microdisplay panel 120a. The connection reinforcement plate 125b of the second microdisplay panel 120b can provide mechanical support for the second connector 126b of the second microdisplay panel 120b. The second connector 126b of the second microdisplay panel 120b is located on one surface of the connection reinforcement plate 125b of the second microdisplay panel 120b.

[0108] In some embodiments as shown in FIG16 , the surface of the connection reinforcement plate 125a where the second connector 126a is located is located on the same side as the surface of the chip reinforcement plate 124a where the display chip 121a is located; in some embodiments as shown in FIG17 , the surface of the connection reinforcement plate 125b where the second connector 126b is located is located on the same side as the surface of the chip reinforcement plate 124b where the display chip 121b is located.

[0109] In some embodiments of the present invention, the second micro display panels 120a, 120b further include shielding covers (127a, 127b), which are fixed to the other side surface of the connection reinforcement plates (125a, 125b) of the second micro display panels 120a, 120b.

[0110] The shielding covers (127a, 127b) are provided with electronic components, and the shielding covers (127a, 127b) can protect the electronic components provided therein. The electronic components provided in the shielding covers (127a, 127b) can be registers, etc.

[0111] The shielding cover 127a and the second connector 126a are disposed opposite each other and are respectively fixed to two surfaces of the connection reinforcement plate 125a of the second micro display panel 120a. The surface of the connection reinforcement plate 125a of the second micro display panel 120a on which the shielding cover 127a is located is located on opposite sides of the surface of the chip reinforcement plate 124a on which the display chip 121a is located.

[0112] The shielding cover 127b and the second connector 126b are disposed opposite each other and are respectively fixed to two surfaces of the connection reinforcement plate 125b of the second micro display panel 120b. The surface of the connection reinforcement plate 125b of the second micro display panel 120b on which the shielding cover 127b is located is located on opposite sides of the surface of the chip reinforcement plate 124b on which the display chip 121b is located.

[0113] The circuit boards (122a, 122b) of the second micro-display panels (120a, 120b) can be electrically connected to the display chips (121a, 121b) of the second micro-display panels (120a, 120b) and the second connectors (126a, 126b). Specifically, one end of the circuit boards (122a, 122b) is electrically connected to the display chips (121a, 121b) of the second micro-display panels (120a, 120b); and the other end of the circuit boards (122a, 122b) is electrically connected to the second connectors (126a, 126b).

[0114] In some embodiments of the present invention, the circuit board is a flexible circuit board. The circuit boards (122a, 122b) of the second micro-display panels (120a, 120b) are flexible circuit boards, so as to flexibly adjust the relative positions between the chip reinforcement plates (124a, 124b) and the connection reinforcement plates (125a, 125b) of the second micro-display panels (120a, 120b).

[0115] In some embodiments, the circuit boards (122a, 122b) of the second micro-display panels (120a, 120b) are L-shaped. As shown in Figures 14 to 17, the bending direction of the circuit board 122a of the second micro-display panel 120a is opposite to the bending direction of the circuit board 122b of the second micro-display panel 120b. The circuit boards 122a of the second micro-display panel 120a and 122b of the second micro-display panel 120b are chirally symmetrical.

[0116] 1 and 6 , at least a portion of the at least two circuit boards (122a, 122b) of at least two of the second micro-display panels (120a, 120b) are located outside the same side of the light combining assembly 130. In some embodiments, at least a portion of the at least two circuit boards (122a, 122b) of at least two of the second micro-display panels (120a, 120b) are stacked. In some embodiments, the at least two circuit boards (122a, 122b) of at least two of the second micro-display panels (120a, 120b) are staggered.

[0117] At least two second connectors of the second micro display panels are connected to at least two first connectors of the first micro display panel in a one-to-one correspondence; the second connectors of the at least two second micro display panels are arranged in the same plane and the plane where the second connectors of the at least two second micro display panels are located is parallel to the surface of the connection reinforcement plate of the first micro display panel.

[0118] The second connectors (126a, 126b) of the second micro display panels (120a, 120b) are plugged and matched with the two first connectors (116a, 116b) of the first micro display panel 110 respectively.

[0119] As shown in FIG. 1 , FIG. 5 and FIG. 8 , at least two of the second connectors are coplanar after plugging and mating; and at least two of the second connectors are parallel to the surface of the connection reinforcement plate 115 of the first micro display panel 110 after plugging and mating.

[0120] After plugging and mating, the second connector 126a of the second micro display panel 120a and the second connector 126b of the second micro display panel 120b are coplanar and parallel to the surface of the connection reinforcement plate 115; and the distances from the second connector 126a and the second connector 126b to the surface of the connection reinforcement plate 115 are equal.

[0121] It should be noted that in order to ensure that the second connector 126a and the second connector 126b are coplanar and parallel to the surface of the connection reinforcement plate 115 after plugging and mating, at least two first connectors (116a, 116b) on the connection reinforcement plate 115 are the same connectors, and at least two first connectors (116a, 116b) are of the same type and the same height; at least two second connectors of the second micro display panel are the same connector, and at least two second connectors are of the same type and the same height.

[0122] Referring to Figure 11 , the light-combining assembly 130 has at least two light-incident surfaces and one light-exiting surface. Light generated by the multiple micro-display panels enters the light-combining assembly 130 through its corresponding light-incident surfaces. The light-combining assembly 130 then couples the light generated by the multiple micro-display panels to form projected light, which then exits from the light-exiting surface.

[0123] Specifically, the light-combining assembly 130 has three light-incident surfaces and one light-emitting surface. For example, the light-combining assembly 130 is a cube. For example, the light-combining assembly 130 is a cube or a cuboid. The light-combining assembly 130 has two mutually parallel top surfaces and four side surfaces; the four side surfaces of the light-combining assembly 130 are respectively the three light-incident surfaces and the one light-emitting surface.

[0124] As shown in FIG11 , in the light combining assembly 130, the three light incident surfaces are light incident surface 131, light incident surface 132a, and light incident surface 132b. The light emitting surface 132c is the side surface opposite to the light incident surface 131. The light incident surface 132a and the light incident surface 132b are located on opposite sides of the line connecting the light emitting surface 132c and the light incident surface 131.

[0125] 11 , a first semi-transparent and semi-reflective film 1301 and a second semi-transparent and semi-reflective film 1302 are provided in the mirror body of the light combining assembly 130 , and the first semi-transparent and semi-reflective film 1301 and the second semi-transparent and semi-reflective film 1302 are alternately provided in the mirror body.

[0126] The display chip 111 of the first micro-display panel 110 is disposed on one side of the light incident surface 131 of the light combining assembly 130. The light emitting surface of the display chip 111 of the first micro-display panel 110 faces the light incident surface 131. Light generated by the display chip 111 of the first micro-display panel 110 enters the mirror body of the light combining assembly 130 through the light incident surface 131, transmits through the first semi-transmissive and semi-reflective films 1301 and the second semi-transmissive and semi-reflective films 1302, and then exits through the light emitting surface 132c.

[0127] The circuit board 112 of the first micro display panel 110 is electrically connected to one end of the first connector 110 and is bent toward a section of the display chip (121a, 121b) electrically connected to the second micro display panel (120a, 120b), so that the chip reinforcement plate 114 and the connection reinforcement plate 115 can be stacked, and the surface provided with the first connector (116a, 116b) can be turned away from the light combining component 130, and the first connector (116a, 116b) can be turned away from the light combining component 130.

[0128] The display chip 121a of the second micro-display panel 120a is disposed on one side of the light incident surface 132a of the light combining component 130. The light emitting surface 132c of the display chip 121a of the second micro-display panel 120a faces the light incident surface 132a. Light generated by the display chip 121a of the second micro-display panel 120a enters the mirror body of the light combining component 130 through the light incident surface 132a. Part of the light entering the mirror body of the light combining component 130 transmits through the first semi-transmissive and semi-reflective film 1301, is reflected by the second semi-transmissive and semi-reflective film 1302 to the light emitting surface 132c, and is emitted through the light emitting surface 132c. Part of the light entering the mirror body of the light combining component 130 is reflected by the first semi-transmissive and semi-reflective film 1301 to the second semi-transmissive and semi-reflective film 1302, transmits through the second semi-transmissive and semi-reflective film 1302, and is emitted through the light emitting surface 132c.

[0129] The circuit board 122a of the second micro-display panel 120a is electrically connected to one end of the second connector 126a through a top surface of the light-combining component 130 and is bent toward the light-incident surface 131, so that the connection reinforcement plate 125a can be stacked on the side of the connection reinforcement plate 115 away from the light-combining component 130, and the surface provided with the second connector 126a can be directed toward the connection reinforcement plate 115, and the second connector 126a is snap-fitted and connected with a first connector (116a, 116b).

[0130] The display chip 121b of the second micro-display panel 120b is disposed on one side of the light incident surface 132b of the light combining component 130. The light emitting surface 132c of the display chip 121b of the second micro-display panel 120b faces the light incident surface 132b. Light generated by the display chip 121b of the second micro-display panel 120b enters the mirror body of the light combining component 130 through the light incident surface 132b. Part of the light entering the mirror body of the light combining component 130 transmits the second semi-transmissive and semi-reflective film 1302, is reflected by the first semi-transmissive and semi-reflective film 1301 to the light emitting surface 132c, and is emitted through the light emitting surface 132c. Part of the light entering the mirror body of the light combining component 130 is reflected by the second semi-transmissive and semi-reflective film 1302 to the first semi-transmissive and semi-reflective film 1301, transmits the first semi-transmissive and semi-reflective film 1301, and is emitted through the light emitting surface 132c.

[0131] The circuit board 122b of the second micro-display panel 120b is electrically connected to one end of the second connector 126b through a top surface of the light-combining component 130 and is bent toward the side of the light-incident surface 131, so that the connection reinforcement plate 125b can be stacked on the side of the connection reinforcement plate 115 away from the light-combining component 130, and the surface provided with the second connector 126b can be directed toward the connection reinforcement plate 115, and the second connector 126b is snap-fitted and connected with a first connector (116a, 116b).

[0132] The light incident surface 132a and the light incident surface 132b are located opposite to each other on both sides of the line between the light emitting surface 132c and the light incident surface 131; the circuit board 122a of the second micro display panel 120a and the circuit board 122b of the second micro display panel 120b are chirally symmetrical; the circuit board 122a of the second micro display panel 120a and the circuit board 122b of the second micro display panel 120b extend on the same top surface of the light combining component 130, and the circuit board 122a of the second micro display panel 120a and the circuit board 122b of the second micro display panel 120b are stacked on the same top surface of the light combining component 130.

[0133] In some embodiments of the present invention, the micro-projection optical engine further includes a mounting frame 150, wherein the mounting frame 150 defines an installation space 1501. A side surface of the mounting space 1501 includes at least one light entrance opening 1502 and a light exit opening 1503 that communicate with the mounting space 1501. The light combining assembly 130 is mounted within the mounting space 1501, with the at least one light entrance surface corresponding to the at least one light entrance opening 1502, and the light exit surface 132c corresponding to the light exit opening 1503. The display segment of the micro-display panel is fixed to the light entrance opening of the mounting frame 150.

[0134] In some embodiments, the size of the display chip ( 111 , 121 a , 121 b ) is adapted to the size of the light entrance opening 1502 , and the display chip ( 111 , 121 a , 121 b ) is installed in the light entrance opening 1502 .

[0135] Referring to FIG7 , in some embodiments, the size of the chip reinforcement plate (114, 124a, 124b) is larger than the size of the display chip (111, 121a, 121b), and the portion of the chip reinforcement plate (114, 124a, 124b) that exceeds the display chip (111, 121a, 121b) is located outside the mounting frame 150. In some embodiments, the mounting frame 150 abuts against the chip reinforcement plate (114, 124a, 124b) to limit the mounting depth of the display chip (111, 121a, 121b). In some embodiments, adhesive is filled between the portion of the chip reinforcement plate (114, 124a, 124b) that exceeds the display chip (111, 121a, 121b) and the mounting frame 150. In some embodiments, the adhesive is a highly transparent epoxy adhesive.

[0136] Specifically, the display chip 111 of the first micro display panel 110 is clamped in the light entrance opening of the mounting frame 150 on the side of the light entrance surface 131; the display chip 121a of the second micro display panel 120a is clamped in the light entrance opening of the mounting frame 150 on the side of the light entrance surface 132a; and the display chip 121b of the first micro display panel 120b is clamped in the light entrance opening of the mounting frame 150 on the side of the light entrance surface 132b.

[0137] Referring to the figure, the light incident opening 1502 includes a first opening section 15021 and a second opening section 15022 , and the width of the first opening section 15021 is greater than the width of the second opening section 15022 .

[0138] 3 , the display segment of the micro display panel (110, 120a) further includes a power connection segment 128, in which the display chip (111, 121a, 121b) is electrically connected to the circuit board, and the width of the power connection segment 128 is greater than the width of the display chip (111, 121a, 121b); the power connection segment 128 is installed in the first opening segment 15021, and the display chip (111, 121a, 121b) is installed in the second opening segment 15022. Specifically, the power connection section 128 and the display chips (111, 121a, 121b) are arranged in parallel on the chip reinforcement plate (114, 124a, 124b). At the power connection section 128, the display chips (111, 121a, 121b) are electrically connected to the ends of the corresponding circuit boards (112, 122a, 122b) via metal wires, and a packaging body is wrapped around the outside of the metal wires. The width of the first opening section 15021 of the light entrance opening 1502 is made larger than the width of the second opening section 15022 to better adapt to the size of the power connection section 128.

[0139] Referring to Figures 3 and 7 , at least one side of the mounting frame 150 has at least one fixing portion 1504 adapted to engage with an external fixture for positioning. For example, during assembly, a fixture may be used to secure the mounting frame 150. The fixing portion 1504 on the side of the mounting frame 150 can effectively cooperate with the fixture to position the mounting frame 150.

[0140] Specifically, the fixing position 1504 is provided with a groove. In some embodiments, the shape of the groove includes at least one of an I-shaped, oval, and square. In some embodiments, the fixing position may also have some raised structures. As long as the fixing position 1504 can achieve the effect of mutual coordination and positioning with an external fixture, the specific form of the fixing position 1504 should not constitute a limitation to this application.

[0141] 3 and 7 , the installation frame 150 includes a first fixing position 1504 a and a second fixing position 1504 b , and the planes where the first fixing position 1504 a and the second fixing position 1504 b are located are arranged opposite to each other.

[0142] Referring to Figure 3 , at least one side surface of the mounting frame 150 has at least one injection hole 1505. The gap between the mounting frame 150 and the light-combining assembly 130 communicates with the injection hole 1505. Adhesive can be injected into the gap between the mounting frame 150 and the light-combining assembly 130 through the injection hole 1505 to secure the light-combining assembly 130 to the mounting frame 150. Referring to Figure 3 , the injection hole 1505 and the at least one fixing point 1504 are located on the same surface of the mounting frame 150.

[0143] 9 , the size of the light outlet 1503 is larger than that of the light combining assembly 130 , and the size of the light combining assembly 130 is larger than that of the light entrance 1502 . The light combining assembly 130 can be installed into the installation space 1501 through the light outlet 1503 .

[0144] The micro-projection engine further includes a lens assembly 140 , which is fixed to the light outlet 1503 of the mounting frame 150 . Light emitted from the light outlet 1503 can enter the lens assembly 140 , and the lens assembly 140 can also limit the position of the light combining assembly 130 .

[0145] 18 to 21 , another embodiment of the projection light structure of the present invention is described.

[0146] The present invention will not elaborate on the similarities with the above embodiments. The difference from the above embodiments is that in some embodiments of the present invention, the micro-projection optical engine does not have a mounting frame, and the micro-display panel is directly adhered to the light incident surface of the light combining component 230.

[0147] Referring to Figures 18 and 19, specifically, the lens assembly 240 includes a lens housing 2401, the lens housing 2401 includes a light input end 2401a and a light output end 2401b, the light input end 2401a has a mounting groove 2402, and the light combining assembly 230 is provided with one end of the light output surface 232c fixed in the mounting groove 2402.

[0148] 21 , a preset distance d1 is defined between the edge of the transflective films (2301, 2302) disposed within the light-combining assembly 230 and the light-emitting surface 232c of the light-combining assembly 230. The preset distance d1 is less than the depth of the mounting groove 2402. In some embodiments, the preset distance d1 ranges from 0.5 mm to 1 mm.

[0149] In some embodiments, the light incident end 2401 a of the lens assembly 240 has an inclined surface 2403 connected to a side wall of the mounting groove 2402 .

[0150] As shown in FIG18 , the light emitting surface of the display chip of the micro display panel is adhered and fixed to the light incident surface of the light combining assembly.

[0151] The light-emitting surface of the display chip of the first micro-display panel 210 is bonded and fixed to one light-incident surface of the light-combining component 230; the light-emitting surface of the display chip of the second micro-display panel 220a is bonded and fixed to the other light-incident surface of the light-combining component 230; the light-emitting surface of the display chip of the second micro-display panel 220b is bonded and fixed to the other light-incident surface of the light-combining component 230.

[0152] 18 and 19 , the lens assembly 240 is fixed to the emission surface of the light combining assembly 230. One end of the lens assembly 240 facing the light combining assembly 230 is fixedly attached to the emission surface of the light combining assembly 230.

[0153] The light incident surface of the light output surface of the display chip attached to the second micro display panel 220a and the light incident surface of the light output surface of the display chip attached to the second micro display panel 220b are located on both sides of the line between the light incident surface of the light output surface of the display chip attached to the first micro display panel 210 and the output surface of the light combining component 230.

[0154] In addition, the present invention further provides an electronic device, which includes a micro-projection optical engine, and the micro-projection optical engine is the micro-projection optical engine of the present invention.

[0155] The micro-projection optical engine is the micro-projection optical engine of the present invention. The specific technical solution of the micro-projection optical engine is referred to the embodiment of the micro-projection optical engine mentioned above, and the present invention will not repeat it here.

[0156] In summary, the second connectors of at least two of the second micro-display panels are coplanar and located in a plane parallel to the surface of the connection reinforcement plate of the first micro-display panel. This coplanar arrangement of at least two second connectors, both parallel to the surface of the connection reinforcement plate, reduces the combined thickness of the connected second connectors and the first connector, helping to control the volume of the micro-projection engine.

[0157] The display area of ​​the micro display panel provided above includes an array of multiple micro LED pixels. A driving backplane is set on the back of the micro LED pixel array. The driving backplane is electrically connected to the micro LEDs in the micro LED pixel array. The driving backplane can obtain signals such as image data from the outside world and can control the corresponding micro LEDs to emit light or not. The driving backplane is a TFT (Thin Film Transistor) board or an IC (Integrated Circuit) board. For example,

[0158] 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 this application.

[0159] 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. A micro-projection optical machine, characterized in that: include: A light combining component, the light combining component having at least a light incident surface and a light emitting surface; A lens assembly, wherein the lens assembly is fixedly arranged relative to the light-emitting surface of the light-combining assembly; At least one micro-display panel, the micro-display panel including a display segment, the display segment of the at least one micro-display panel being arranged opposite to the at least one light incident surface of the light combining component, and the light emitted by the display segment of the at least one micro-display panel being able to enter the light combining component through the light incident surface and be emitted through the light emitting surface.

2. The micro-projection optical machine according to claim 1, wherein: The lens assembly includes a lens housing, which includes a light input end and a light output end. The light input end has a mounting groove, and one end of the light combining assembly provided with the light output surface is fixed in the mounting groove.

3. The micro-projection optical machine according to claim 2, wherein: The light incident end of the lens assembly has an inclined surface connected to the side wall of the mounting groove.

4. The micro-projection optical machine according to claim 2, wherein: At least one semi-transparent and semi-reflective film is provided in the light combining component. A preset distance is provided between the edge of the semi-transparent and semi-reflective film and the light emitting surface of the light combining component. The preset distance is smaller than the depth of the mounting groove.

5. The micro-projection optical machine according to claim 4, wherein: The preset distance ranges from 0.5 mm to 1 mm.

6. The micro-projection optical machine according to claim 1, wherein: The display segments of the at least one micro display panel are fixed to the at least one light incident surface via adhesive.

7. The micro-projection optical machine according to any one of claims 1 to 6, wherein: The micro display panel further includes a circuit board and a connector segment, one end of the circuit board is electrically connected to the display segment, and the other end is electrically connected to the connector segment; The at least one micro display panel includes a first micro display panel and at least two second micro display panels; The connector section of the first micro display panel includes at least two first connectors located on the same side; The connector segment of the second micro display panel includes a second connector; At least two second connectors of the second micro display panel are connected to at least two first connectors of the first micro display panel in a one-to-one correspondence.

8. The micro-projection optical machine according to claim 7, wherein: The connector sections of at least two of the second micro display panels are located in the same plane.

9. The micro-projection optical machine according to claim 7, wherein: The distances between the connector segments of at least two of the second micro display panels and the connector segment of the first micro display panel are the same.

10. The micro-projection optical machine according to claim 7, wherein: The connector segments of at least two of the second micro display panels are arranged in parallel.

11. The micro-projection optical machine according to claim 7, wherein: The plurality of connector segments of the plurality of micro display panels are stacked with the light combining component.

12. The micro-projection optical machine according to claim 11, wherein: The plurality of connector segments of the plurality of micro display panels are stacked and arranged on a side of the display segment of the first micro display panel away from the light combining assembly.

13. The micro-projection optical machine according to claim 7, wherein: The plurality of connector segments of the plurality of micro display panels are not stacked with the light combining assembly.

14. The micro-projection optical machine according to claim 13, wherein: At least a portion of at least two of the circuit boards of at least two of the second micro display panels is located on the same side of the light combining assembly.

15. The micro-projection optical machine according to claim 14, wherein: At least a portion of at least two of the circuit boards of at least two of the second micro display panels are stacked.

16. The optical projection machine according to claim 15, wherein: At least two of the circuit boards of at least two of the second micro display panels are staggered with each other.

17. The micro-projection optical machine according to claim 7, wherein: The circuit board is a flexible circuit board.

18. The micro-projection optical machine according to claim 7, wherein: The circuit board of the first micro display panel is in a strip shape; the circuit board of the second micro display panel is in an L shape.

19. The micro-projection optical machine according to claim 7, wherein: The first micro display panel further includes an external connector, and the external connector and the at least two first connectors are located on different and opposite surfaces of the first micro display panel.

20. The micro-projection optical machine according to claim 19, wherein: Preset electronic components are arranged at preset positions on the surface of the first micro display panel where the external connector is provided.

21. The micro-projection optical machine according to claim 20, wherein: The electronic components include capacitors and resistors.

22. The micro-projection optical machine according to claim 7, wherein: The first micro-display panel emits green light, and the number of the second micro-display panels is two, one of the second micro-display panels emits red light, and the other second micro-display panel emits blue light.

23. An electronic device, characterized in that: A micro-projection optical machine comprising any one of claims 1-22.

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