Optical module with microdisplay panel

Abstract

An optical module with a microdisplay panel includes an optical waveguide (10), an optical engine (20), and a mounting frame (30). The optical waveguide (10) has a developing area (11) and a fixed area (12) located on one side of the developing area (11). The optical engine (20) includes a lens assembly (21) and a microdisplay panel assembly (22). Light emitted from the microdisplay panel assembly (22) can be emitted through the lens assembly (21). The mounting frame (30) has a first mounting bracket that is interconnected with the microdisplay panel assembly. The optical module has a mounting bracket (31) and a second mounting bracket (32). The fixed area (12) of the optical waveguide (10) is mounted in the first mounting bracket (31), and the lens assembly (21) of the optical engine (20) is mounted in the second mounting bracket (32). The central axis of the lens assembly (21) is staggered with the plane where the optical waveguide (10) is located. The light emitted by the optical engine (20) can illuminate the fixed area (12) of the optical waveguide (10) and be displayed in the developing area (11) of the optical waveguide (10). The mounting bracket (30) of the optical module can effectively fix the optical waveguide (10) and the optical engine (20) relative to each other, so that the light emitted by the optical module can be effectively transmitted to the optical waveguide (10).

Description

Optical module with micro display panel Technical Field

[0001] The present invention relates to the field of Micro LEDs, and in particular to an optical module having a micro display panel. Background Art

[0002] In recent years, with the continuous development of science and technology, Micro LED technology has continued to develop, making the size of micro display panels smaller and smaller, and the size of optical machines has also been shrinking, greatly meeting the application needs of Micro LED in the AR industry.

[0003] Currently, the mainstream display solution in the AR field is the combination of Micro LED display panels and optical waveguides, which can achieve excellent display effects. However, the fixing of Micro LED display panels and optical waveguides to each other will affect the display effect and aesthetics to a certain extent, which is a technical problem that needs to be solved in combining Micro LED display panels with optical waveguides.

[0004] Summary of the Invention

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide an optical module with a micro display panel, and the mounting frame of the optical module can effectively fix the optical waveguide and the optical machine relative to each other, so that the light emitted by the optical module can be effectively transmitted to the optical waveguide.

[0006] In order to achieve the above-mentioned object, the present invention discloses an optical module having a micro display panel, characterized in that it includes:

[0007] an optical waveguide plate having a developing area and a fixing area located on one side of the developing area;

[0008] an optical engine, the optical engine comprising a lens assembly and a micro display panel assembly, wherein light emitted by the micro display panel assembly can be emitted through the lens assembly; and

[0009] A mounting frame having a first mounting slot and a second mounting slot that are interconnected, the fixing area of ​​the optical waveguide plate being installed in the first mounting slot, the lens assembly of the optical engine being installed in the second mounting slot, and the central axis of the lens assembly being arranged to intersect the plane where the optical waveguide plate is located; the light emitted by the optical engine can irradiate the fixing area of ​​the optical waveguide plate and be displayed in the developing area of ​​the optical waveguide plate.

[0010] The mounting frame includes a frame body and two extension arms extending outward from the frame body, the first mounting slot is formed between the two extension arms, and the second mounting slot is formed in the frame body.

[0011] Wherein, the optical machine is a monochromatic optical machine.

[0012] Wherein, the micro-display panel assembly of the optical engine includes a micro-display panel, and the micro-display panel can emit one of red light, green light and blue light.

[0013] Wherein, the light machine is a color light machine.

[0014] The micro-display panel assembly includes at least two micro-display panels capable of emitting light of different colors and a light-combining prism. The micro-display panel includes a display segment, a connecting wire, and a connector segment. One end of the connecting wire is electrically connected to the display segment, and the other end is electrically connected to the connector segment.

[0015] The light-combining prism has a light-emitting surface and at least two light-incident surfaces. The at least two display segments of the at least two micro-display panels are respectively arranged opposite to the at least two light-incident surfaces. The light emitted by the at least two micro-display panels is converged by the light-combining prism and then emitted through the light-emitting surfaces.

[0016] The at least two micro-display panels include a first micro-display panel, a second micro-display panel, and a third micro-display panel, wherein the first micro-display panel can emit red light, the second micro-display panel can emit green light, and the third micro-display panel can emit blue light;

[0017] The at least two light incident surfaces include a first light incident surface, a second light incident surface, and a third light incident surface; and

[0018] The display segment of the first micro display panel is arranged opposite to the first light incident surface, the display segment of the second micro display panel is arranged opposite to the second light incident surface, and the display segment of the third micro display panel is arranged opposite to the third light incident surface.

[0019] Wherein, the at least two connector segments of the at least two micro display panels are separated and independent from each other.

[0020] Wherein, the at least two connector segments of the at least two micro display panels are stacked on each other.

[0021] There is a preset inclination angle between the central axis of the color light machine and the plane where the light waveguide plate is located.

[0022] Wherein, the color light machine is inclined toward the upper end of the optical waveguide sheet, and the inclination angle ranges from 20° to 60°;

[0023] Or the color light machine is tilted toward the lower end of the optical waveguide plate, and the tilt angle ranges from 20° to 60°.

[0024] The optical module with the micro display panel is a binocular optical module, and the number of the mounting frame, the optical waveguide plate, and the optical engine are two, respectively, and the two mounting frames are connected to each other.

[0025] Therefore, the technical solution of the present invention has the following technical effects:

[0026] (1) The mounting frame of the optical module can effectively fix the optical waveguide and the optical engine relative to each other, so that the light emitted by the optical module can be effectively transmitted to the optical waveguide;

[0027] (2) The mounting frame of the optical module includes a frame body and two extension arms extending outward from the frame body, wherein a first mounting groove is formed between the two extension arms, and the fixing area of ​​the optical waveguide is fixedly mounted in the first mounting groove. The two extension arms of the mounting frame are half-wrapped around the outside of the fixing area of ​​the optical waveguide, thereby reducing obstruction of the optical waveguide; and

[0028] (3) There is a preset inclination angle between the central axis of the optical machine of the optical module and the plane where the optical waveguide plate is located, so that the light of the optical machine can better enter the optical waveguide plate, so as to be better displayed in the display area of ​​the optical waveguide plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and other objects, features and advantages of the present disclosure will become more apparent through a more detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings, wherein like reference numerals generally represent like components in the exemplary embodiments of the present disclosure.

[0030] FIG1 is a schematic diagram of the three-dimensional structure of an optical module with a micro display panel according to a first embodiment of the present invention;

[0031] FIG2 is a schematic diagram of the front structure of an optical module with a micro display panel according to the first embodiment of the present invention;

[0032] 3 is a schematic diagram of the back structure of an optical module with a micro display panel according to the first embodiment of the present invention;

[0033] 4 is a schematic side view of the structure of an optical module with a micro display panel according to the first embodiment of the present invention;

[0034] 5 is a schematic diagram of the exploded structure of the optical module with a micro display panel according to the first embodiment of the present invention at a first viewing angle;

[0035] 6 is a schematic diagram of the exploded structure of the optical module with a micro display panel according to the first embodiment of the present invention at a second viewing angle;

[0036] 7 is a schematic diagram of the three-dimensional structure of an optical module with a micro display panel according to a second embodiment of the present invention;

[0037] 8 is a schematic diagram of the front structure of an optical module with a micro display panel according to a second embodiment of the present invention;

[0038] 9 is a schematic side view of the structure of an optical module with a micro display panel according to a second embodiment of the present invention;

[0039] 10 is a schematic diagram of the exploded structure of an optical module with a micro display panel according to a second embodiment of the present invention at a first viewing angle;

[0040] 11 is a schematic diagram of the exploded structure of an optical module with a micro display panel according to a second embodiment of the present invention, viewed from a second perspective;

[0041] 12 is a schematic diagram of the optical path of an optical module with a micro display panel according to a second embodiment of the present invention;

[0042] 13 is a schematic diagram of the three-dimensional structure of an optical module with a micro display panel according to a third embodiment of the present invention;

[0043] FIG14 is a schematic diagram of the three-dimensional structure of an optical module with a micro display panel according to a third embodiment of the present invention;

[0044] FIG15 is a schematic diagram of the three-dimensional structure of an optical module with a micro display panel according to a third embodiment of the present invention;

[0045] FIG16 is a schematic diagram of the front structure of an optical module with a micro display panel according to a third embodiment of the present invention;

[0046] FIG17 is a schematic side view of the structure of an optical module with a micro display panel according to a third embodiment of the present invention;

[0047] FIG18 is a schematic diagram of the exploded structure of an optical module with a micro display panel according to a third embodiment of the present invention;

[0048] FIG19 is a schematic diagram of the exploded structure of an optical module with a micro display panel according to a third embodiment of the present invention;

[0049] FIG20 is a schematic side view of the structure of an optical module with a micro display panel according to a fourth embodiment of the present invention;

[0050] FIG21 is a schematic diagram of the three-dimensional structure of an optical module with a micro display panel according to a fifth embodiment of the present invention;

[0051] FIG22 is a schematic diagram of the three-dimensional structure of an optical module with a micro display panel according to a fifth embodiment of the present invention;

[0052] FIG23 is a schematic diagram of the front structure of an optical module with a micro display panel according to a fifth embodiment of the present invention;

[0053] FIG24 is a schematic top view of the structure of an optical module with a micro display panel according to a fifth embodiment of the present invention;

[0054] FIG25 is a schematic diagram of the exploded structure of an optical module with a micro display panel according to a fifth embodiment of the present invention;

[0055] FIG. 26 is a schematic diagram of the exploded structure of an optical module with a micro display panel according to a fifth embodiment of the present invention. DETAILED DESCRIPTION

[0056] The preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0057] Some embodiments of the present invention provide an optical module having a micro display panel.

[0058] Figure 1 is a schematic diagram of the three-dimensional structure of an optical module with a microdisplay panel according to one embodiment of the present invention. Referring to Figure 1 , the optical module with a microdisplay panel provided by the present invention includes an optical waveguide 10, an optical engine 20, and a mounting frame 30. The optical waveguide 10 includes a developing area 11 (see developing area 11 in Figure 5 ) and a fixing area 12 (see fixing area 12 in Figure 5 ) located to one side of the developing area 11. The optical engine 20 includes a lens assembly 21 (see lens assembly 21a in Figure 5 ) and a microdisplay panel assembly 22 (see microdisplay panel 22a in Figure 5 ). Light emitted by the microdisplay panel assembly 22 can be emitted through the lens assembly 21. The mounting frame 30 has a first mounting groove 31 (refer to the first mounting groove 31 in Figure 6) and a second mounting groove 32 (refer to the second mounting groove 32 in Figure 5) that are interconnected. The fixing area 12 of the optical waveguide plate 10 is installed in the first mounting groove 31, and the lens assembly 21 of the optical machine 20 is installed in the second mounting groove 32. The central axis of the lens assembly 21 is staggered with the plane where the optical waveguide plate 10 is located. The light emitted by the optical machine 20 can be irradiated to the fixing area 12 of the optical waveguide plate 10 and displayed in the developing area 11 of the optical waveguide plate 10.

[0059] In the optical module with the micro display panel provided by the present invention, the optical engine 20 and the optical waveguide sheet 10 can be firmly fixed by the mounting frame 30 , and the light emitted by the optical engine 20 can be displayed on the developing area 11 of the optical waveguide sheet 10 .

[0060] Referring to Figure 5 , in some embodiments, the mounting bracket 30 includes a bracket body 33 and two extension arms 34 extending outward from the bracket body 33. A first mounting slot 31 is formed between the two extension arms 34, and a second mounting slot 32 is formed in the bracket body 33. The two extension arms 34 of the mounting bracket 30 are semi-open and wrap around the side areas of the optical waveguide sheet 10, significantly reducing obstruction of the optical waveguide sheet 10.

[0061] In some embodiments, the thickness of the second mounting groove 32 on the frame body 33 is adapted to the thickness of the lens assembly 21 of the optical engine 20. After the lens assembly 20 is installed in the second mounting groove 32, the sidewalls of the second mounting groove 32 can secure the lens assembly 20. In some embodiments, the gap between the lens assembly 21 and the sidewalls of the second mounting groove 32 can be filled with glue or other adhesive to further enhance the installation stability of the lens assembly 20 in the second mounting groove 32. In some embodiments, the outer wall of the lens assembly 21 and the inner wall of the second mounting groove 32 have mutually matching threads, and the lens assembly 21 can be fixed by threading through the sidewalls of the second mounting groove 32.

[0062] 7 to 11 , in some embodiments, the mounting bracket 30 is square in shape. It is understood that as long as the optical waveguide sheet 10 and the optical engine 20 can be fixed relative to each other, the specific shape of the mounting bracket 30 should not constitute a limitation to the present invention.

[0063] In some embodiments, after the fixing region 12 of the optical waveguide sheet 10 is fixedly mounted in the first mounting slot 31 of the mounting frame 30 and the lens assembly 21 of the optical engine 20 is fixedly mounted in the second mounting slot 32 of the mounting frame 30, the light-emitting end of the lens assembly 20 is aligned with at least a portion of the fixing region 12. Light emitted from the lens assembly 21 enters the fixing region 12 and can be refracted or reflected toward the developing region 11, where it is displayed.

[0064] Referring to Figures 1 to 6 , in some embodiments, the light engine 20 is a monochromatic light engine 20a. Monochromatic light engine 20a includes a lens assembly 21a and a microdisplay panel 22a. Lens assembly 21a is located in the propagation path of light emitted by microdisplay panel 22a and is capable of collimating the light emitted by microdisplay panel 22a. In some embodiments, microdisplay panel 22a can emit one of green, blue, or red light.

[0065] Referring to Figures 7 to 11 , in some embodiments, the light engine 20 is a color light engine 20b. The color light engine 20 includes a lens assembly 21b, at least two micro-display panels 22b capable of emitting light of different colors, and a light-combining prism 23b. Light emitted by the at least two micro-display panels 22b is converged by the light-combining prism 23b to form colored light that is then emitted through the lens assembly 21b.

[0066] Referring to FIG. 12 , in some embodiments, the at least two micro-display panels 22b include a first micro-display panel 221b, a second micro-display panel 222b, and a third micro-display panel 223b. The light-combining prism 23b has a first light-incident surface 231b, a second light-incident surface 232b, a third light-incident surface 233b, and a light-exiting surface 234b. The first micro-display panel 221b corresponds to the first light-incident surface 231b, and light emitted by the first micro-display panel 221b can enter the interior of the light-combining prism 23b through the first light-incident surface 231b. The second micro-display panel 222b corresponds to the second light-incident surface 232b, and light emitted by the second micro-display panel 222b can enter the interior of the light-combining prism 23b through the second light-incident surface 232b. The third micro-display panel 223b corresponds to the third light-incident surface 233b, and light emitted by the third micro-display panel 223b can enter the interior of the light-combining prism 23b through the third light-incident surface 233b. Light emitted by the first micro display panel 221 b , the second micro display panel 222 b , and the third micro display panel 223 b converges inside the light combining prism 23 b and then exits through the light emitting surface 234 b .

[0067] In some embodiments, the first micro display panel 221b can emit red light, the second micro display panel 222b can emit green light, and the third micro display panel 223b can emit blue light.

[0068] Referring to Figure 12, the light-combining prism 23b includes a mirror body 235b, a first semi-reflective semi-transparent membrane 236b, and a second semi-reflective semi-transparent membrane 237b. The first and second semi-reflective semi-transparent membranes 236b, 237b are interlaced within the mirror body 235b. Light emitted from the first micro-display panel 221b enters the light-combining prism 23b through the first light incident surface 231b, passes through the first and second semi-reflective semi-transparent membranes 236b, 237b, and exits through the light exit surface 234b. After light from the second micro-display panel 222b passes through the second light-incident surface 232b and enters the light-combining prism 23b, a portion of the light is first reflected by the first semi-reflective semi-transparent membrane 236b, then passes through the second semi-reflective semi-transparent membrane 237b, and exits through the light-exiting surface 234b. Another portion of the light first passes through the second semi-reflective semi-transparent membrane 237b, then is reflected by the first semi-reflective semi-transparent membrane 236b, and exits through the light-exiting surface 234b. After light from the third micro-display panel 223b passes through the third light-incident surface 233b and enters the light-combining prism 23b, a portion of the light is first reflected by the second semi-reflective semi-transparent membrane 237b, then passes through the first semi-reflective semi-transparent membrane 236b, and exits through the light-exiting surface 234b. Another portion of the light first passes through the first semi-reflective semi-transparent membrane 236b, then is reflected by the second semi-reflective semi-transparent membrane 237b, and exits through the light-exiting surface 234b.

[0069] In some embodiments, the light-combining prism 23b is shaped like a square, such as a rectangular parallelepiped or a cube. In some embodiments, the light-combining prism 23b is formed by splicing four sub-prisms with triangular cross-sections. Sub-semi-reflective and translucent membranes are attached to predetermined surfaces of the four sub-prisms. When the four sub-prisms are spliced ​​together, the sub-semi-reflective and translucent membranes are connected to form a first semi-reflective and translucent membrane 236b and a second semi-reflective and translucent membrane 237b.

[0070] Referring to Figure 8 , in some embodiments, a micro-display panel 22b includes a display segment 224b, a connector segment 225b, and a connecting wire 226b. One end of the connecting wire 226b is electrically connected to the display segment 224b, and the other end is electrically connected to the connector segment 225b. The display segment 224b is equipped with a Micro LED. The display segment 224b of the micro-display panel 22b is positioned opposite the light-incident surface of the corresponding light-combining prism 23b.

[0071] 7 to 11 , in some embodiments, the three connector segments 225 b of the first micro display panel 221 b , the second micro display panel 222 b , and the third micro display panel 223 b are spaced apart and independently disposed.

[0072] 13 to 16 , in some other embodiments, the three connector segments 225 b of the first micro display panel 221 b , the second micro display panel 222 b , and the third micro display panel 223 b are stacked one on top of the other.

[0073] With reference to Figures 17 and 20 , the central axis of the color light engine 20b is tilted at a predetermined angle a to the plane of the optical waveguide sheet 10, allowing the light emitted by the color light engine 20b to better penetrate the optical waveguide sheet 10. With reference to Figure 17 , in some embodiments, the color light engine 20b is tilted toward the upper end of the optical waveguide sheet 10, with the tilt angle a ranging from 20° to 60°. With reference to Figure 20 , in other embodiments, the color light engine 20b is tilted toward the lower end of the optical waveguide sheet 10, with the tilt angle a ranging from 20° to 60°.

[0074] 21 to 26 , the optical module with the micro display panel is a binocular optical module. The number of mounting frames 30 , optical waveguide sheets 10 , and optical engines 20 are two, respectively, and the two mounting frames 30 are connected to each other.

[0075] In the manufacturing method of the Micro LED display panel of the present invention, the electrical connection structure is extended toward one side of the light-emitting mesa to form a connection protrusion, which is electrically connected to the conductive layer. Because the connection protrusion is formed by extending outward from the electrical connection structure, it has a high structural strength, making the connection between the electrical connection structure and the conductive layer more stable.

[0076] It should be noted that relational terms in this document, such as "first" and "second", are used only to distinguish an entity or operation from another entity or operation, and do not require or imply any actual relationship or order between these entities or operations. In addition, the words "include", "have" and "include" and other similar forms are intended to be equivalent in meaning and are open-ended, and one or more items following any of these words are not intended to be an exhaustive list of such one or more items, or to be limited to the listed one or more items.

[0077] As used herein, unless expressly stated otherwise, the term "or" encompasses all possible combinations unless not feasible. For example, if a component is stated to include either A or B, then unless expressly stated otherwise or not feasible, the component may include A, or B, or A and B. As a second example, if a component is stated to include either A, B, or C, then unless expressly stated otherwise or not feasible, the component may include A, or B, or C, or A and B, or A and C, or B and C, or A, B, and C.

[0078] In the foregoing description, embodiments have been described with reference to many specific details, which may vary depending on the implementation. Certain changes and modifications may be made to the described embodiments. Other embodiments will be clear to those skilled in the art in view of the description and practice of the invention disclosed herein. The description and examples are intended to be regarded as merely exemplary, with the true scope and spirit of the invention being indicated by the following claims. The order of steps shown in the accompanying drawings is also intended to be for illustrative purposes only and is not intended to be limited to any particular order of steps. Therefore, it will be understood by those skilled in the art that these steps may be performed in different orders while implementing the same method.

[0079] In the drawings and the specification, exemplary embodiments have been disclosed. However, many variations and modifications may be made to these embodiments. Therefore, although specific terms are employed, they are used in a general and descriptive sense only and not for the purpose of limitation.

Claims

1. An optical module having a micro display panel, characterized in that: include: An optical waveguide sheet having a developing area and a fixing area located on one side of the developing area; An optical machine, the optical machine comprising a lens assembly and a micro display panel assembly, the light emitted by the micro display panel assembly can be emitted through the lens assembly; as well as A mounting frame, the mounting frame has a first mounting groove and a second mounting groove which are interconnected, the fixing area of ​​the optical waveguide sheet is installed in the first mounting groove, the lens assembly of the optical machine is installed in the second mounting groove, and the central axis of the lens assembly is staggered with the plane where the optical waveguide sheet is located; the light emitted by the optical machine can irradiate the fixing area of ​​the optical waveguide sheet and be displayed in the developing area of ​​the optical waveguide sheet.

2. The optical module with a micro display panel according to claim 1, characterized in that: The mounting frame includes a frame body and two extension arms extending outward from the frame body, the first mounting groove is formed around the two extension arms, and the second mounting groove is formed in the frame body.

3. The optical module with a micro display panel according to claim 1, characterized in that: The optical machine is a monochromatic optical machine.

4. The optical module with a micro display panel according to claim 3, characterized in that: The micro display panel assembly of the optical engine includes a micro display panel, and the micro display panel can emit one of red light, green light and blue light.

5. The optical module with a micro display panel according to claim 1, characterized in that: The light machine is a color light machine.

6. The optical module with a micro display panel according to claim 5, characterized in that: The micro display panel assembly includes at least two micro display panels capable of emitting light of different colors and a light combining prism, the micro display panel includes a display segment, a connecting line and a connector segment, one end of the connecting line is electrically connected to the display segment, and the other end is electrically connected to the connector segment; and The light-combining prism has a light-emitting surface and at least two light-entering surfaces. The at least two display segments of the at least two micro-display panels are respectively arranged opposite to the at least two light-entering surfaces. The light emitted by the at least two micro-display panels is converged by the light-combining prism and then emitted through the light-emitting surfaces.

7. The optical module with a micro display panel according to claim 6, characterized in that: The at least two micro display panels include a first micro display panel, a second micro display panel and a third micro display panel, wherein the first micro display panel can emit red light, the second micro display panel can emit green light, and the third micro display panel can emit blue light; The at least two light incident surfaces include a first light incident surface, a second light incident surface, and a third light incident surface; and The display segment of the first micro display panel is arranged opposite to the first light incident surface, the display segment of the second micro display panel is arranged opposite to the second light incident surface, and the display segment of the third micro display panel is arranged opposite to the third light incident surface.

8. The optical module with a micro display panel according to claim 6, characterized in that: The at least two connector segments of the at least two micro display panels are separated and independent from each other.

9. The optical module with a micro display panel according to claim 6, characterized in that: The at least two connector segments of the at least two micro display panels are stacked on each other.

10. The optical module with a micro display panel according to claim 5, characterized in that: There is a preset inclination angle between the central axis of the color light machine and the plane where the light waveguide plate is located.

11. The optical module with a micro display panel according to claim 10, characterized in that: The color light machine is inclined toward the upper end of the optical waveguide sheet, and the inclination angle ranges from 20° to 60°; Or the color light machine is inclined toward the lower end of the optical waveguide sheet, and the inclination angle ranges from 20° to 60°.

12. The optical module with a micro display panel according to claim 1, characterized in that: The optical module with the micro display panel is a binocular optical module, the number of the mounting frame, the optical waveguide sheet and the optical engine are two respectively, and the two mounting frames are connected to each other.

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