Optical module, near-eye display module and apparatus, and near-eye display module manufacturing method

Abstract

The present application provides an optical module, a near-eye display module and apparatus, and a near-eye display module manufacturing method. The optical module comprises: a first reflection window configured to allow to reflect light; a second reflection window spaced apart at an opposite end of the first reflection window, wherein the second reflection window faces the first reflection window and receives light reflected from the first reflection window; an incident window arranged at the center of the second reflection window and aligned with the first reflection window, the incident window being configured to allow to reflect light to be incident into a space formed by the first reflection window and the second reflection window; and an exit window surrounding the first reflection window, the exit window being arranged opposite to the second reflection window, and the incident window being configured to mount a micro-display, and light of the micro-display being incident into the first reflection window from the incident window, reflected by the first reflection window to the second reflection window, and then exited by the exit window, so as to form a projected image. Optical path folding is implemented by means of the first reflection window and the second reflection window, so that the overall volume is effectively reduced, the lightweight design is achieved, and the compatibility and portability are greatly improved.

Description

Optical module, near-eye display module and device, and near-eye display module manufacturing method

[0001] This application claims the priority of the patent application filed with the China Patent Office on September 13, 2023, with application number 2023224964840 and application name “Optical module and augmented reality display device”; the priority of the patent application filed with the China Patent Office on September 13, 2023, with application number 2023111912240 and application name “Augmented reality display device and manufacturing method thereof”; the priority of the patent application filed with the China Patent Office on September 25, 2023, with application number 20 23112564983, the priority of the patent application entitled “Method for manufacturing augmented reality display module and augmented reality display module thereof”; the priority of the patent application entitled “Method for manufacturing augmented reality display device, display device and injection mold” submitted to the China Patent Office on October 31, 2023, with application number 2023114398333; the priority of the patent application entitled “Method for manufacturing augmented reality display device, display device and injection mold” submitted to the China Patent Office on September 25, 2023, with application number 2023112460700, The priority right of the patent application entitled “Mold for manufacturing optical module, method for manufacturing optical module and optical module”; the priority right of the patent application entitled “Method for manufacturing near-eye display device and near-eye display device” submitted to the China Patent Office on September 25, 2023, with application number 2023112456048; the priority right of the patent application entitled “Mold for manufacturing optical module, method for manufacturing optical module and optical module” submitted to the China Patent Office on September 28, 2023, with application number 2023226722992 The application claims priority of the patent application number 2024211123466 filed with the Patent Office of China on May 21, 2024, and entitled “A Near-Eye Display Device and Wearable Device”; the application claims priority of the patent application number 2024220758162 filed with the Patent Office of China on August 26, 2024, and entitled “A Near-Eye Display Device and Wearable Device”. All the above contents are incorporated into this application by reference. Technical Field

[0002] This application belongs to the field of near-eye display technology, and more specifically, relates to an optical module, a near-eye display module and device, and a near-eye display module manufacturing method. Background Art

[0003] Waveguide technology is currently the mainstream solution for AR (augmented reality) display technology. Waveguides couple light projected from a microdisplay into their own glass substrate, transmitting the light through a transmission channel in front of the eye via the principle of "total internal reflection." A decoupling section then releases the light into the eye. Optical elements are core components, and optical element technologies generally include prisms, freeform surfaces, and waveguides. However, these optical technology solutions are relatively complex and present issues such as large size.

[0004] Summary of the Invention

[0005] The purpose of the embodiments of the present application is to provide a method that can solve the problems of complex optical paths and large volume in the prior art and effectively reduce the overall size.

[0006] To achieve the above objectives, in a first aspect, the technical solution adopted by the present application is: to provide an optical module for use in a near-eye display module, comprising: a first reflective window configured to allow reflection of light; a second reflective window spaced apart at opposite ends of the first reflective window and facing the first reflective window, the second reflective window configured to receive light reflected from the first reflective window; an incident window disposed at the center of the second reflective window and aligned with the first reflective window, the incident window configured to allow light to enter the space formed by the first reflective window and the second reflective window; and an exit window disposed parallel to the incident window and surrounding the first reflective window, the exit window configured to allow light to exit the space formed by the first reflective window and the second reflective window; wherein the incident window is used to mount a microdisplay, light from the microdisplay enters the first reflective window from the incident window, is reflected by the first reflective window to the second reflective window, and then exits through the exit window. The optical path folding achieved through primary and secondary reflection effectively reduces the overall volume, and at the same time, this small volume can be assembled on other devices without causing excessive impact on other devices.

[0007] In a second aspect, the present application further provides a near-eye display module, which includes a microdisplay and the optical module in the first aspect described above, wherein the microdisplay is provided at an incident window of the optical module.

[0008] In a third aspect, the present application further provides a near-eye display device, comprising a second shell and a near-eye display module provided in the second shell and in the above-mentioned second aspect.

[0009] In a fourth aspect, the present application also provides a method for manufacturing a near-eye display module, which is used to manufacture the near-eye display module of the second aspect above, comprising: providing a first mold; providing a second mold, wherein the first mold and the second mold include multiple convex surfaces, multiple first surfaces, multiple second surfaces and multiple annular surfaces; injecting molten light-transmitting material into the space between the first mold and the second mold; pressing the first mold and the second mold so that the molten light-transmitting material is fully adhered to the convex surfaces, the first surfaces, the second surfaces and the annular surfaces; demolding the first mold and the second mold to obtain a substrate formed after the light-transmitting material is solidified, wherein the substrate includes: a concave wall with a shape complementary to the convex surface, a first wall surrounding the concave wall, the substrate also includes an annular wall complementary to the annular surface, and a second wall surrounded by the annular wall; the concave wall and the annular wall are coated with a reflective layer to form a first reflective window and a second reflective window, respectively, while the first wall and the second wall are not coated with a reflective layer to form an exit window and an incident window, respectively.

[0010] More relevant beneficial technical effects of this application will be described in the following embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the implementation. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0012] FIG1 is a schematic structural diagram of an optical module according to an embodiment of the present application;

[0013] FIG2 is a schematic structural diagram of another embodiment of an optical module provided in an embodiment of the present application;

[0014] FIG3 is a schematic structural diagram of another embodiment of an optical module provided in an embodiment of the present application;

[0015] FIG4 is a schematic structural diagram of an embodiment of a near-eye display module provided in an embodiment of the present application;

[0016] FIG5 is a structural diagram of an embodiment of a partially enlarged view of a near-eye display module provided in an embodiment of the present application;

[0017] FIG6 is a schematic structural diagram of another embodiment of a near-eye display module provided in an embodiment of the present application;

[0018] FIG7 is a schematic structural diagram of an embodiment of a near-eye display module package provided in an embodiment of the present application;

[0019] FIG8 is a schematic structural diagram of an embodiment of a near-eye display device provided in an embodiment of the present application;

[0020] FIG9 is a schematic diagram of the structure of a near-eye display module according to an embodiment of the present application before assembly;

[0021] FIG10 is a schematic diagram of the structure of an assembled near-eye display module according to an embodiment of the present application;

[0022] FIG11 is a schematic structural diagram of another embodiment of a near-eye display module provided in an embodiment of the present application;

[0023] FIG12 is a schematic diagram of the overall structure of an optical module according to an embodiment of the present application;

[0024] FIG13 is a schematic cross-sectional view of an optical module according to an embodiment of the present application;

[0025] FIG14 is a schematic structural diagram of another embodiment of an optical module provided in an embodiment of the present application;

[0026] FIG15 is a schematic structural diagram of an embodiment of a near-eye display module provided in an embodiment of the present application;

[0027] FIG16 is a schematic structural diagram of an embodiment of a near-eye display module provided in an embodiment of the present application;

[0028] FIG17 is a schematic diagram of an exploded structure of a near-eye display module according to an embodiment of the present application;

[0029] FIG18 is a schematic structural diagram of an embodiment of a first housing of a near-eye display module provided in an embodiment of the present application;

[0030] FIG19 is a schematic structural diagram of an embodiment of an optical module of a near-eye display module provided in an embodiment of the present application;

[0031] FIG20 is a schematic cross-sectional structural diagram of an embodiment of an optical module of a near-eye display module provided in an embodiment of the present application;

[0032] FIG21 is a schematic cross-sectional structural diagram of yet another embodiment of an optical module of a near-eye display module provided in an embodiment of the present application;

[0033] FIG22 is a schematic structural diagram of an embodiment of the near-eye display module provided by an embodiment of the present application in an exploded state of the first shell;

[0034] FIG23 is a schematic structural diagram of an embodiment of a near-eye display module provided in an embodiment of the present application;

[0035] FIG24 is a schematic structural diagram of an embodiment of a near-eye display device provided in an embodiment of the present application;

[0036] 25-32 are schematic flow charts of a method for manufacturing a near-eye display module according to an embodiment of the present application;

[0037] FIG33 is a schematic structural diagram of another embodiment of a near-eye display module provided in an embodiment of the present application;

[0038] FIG34 is a flow chart of an embodiment of a method for manufacturing a near-eye display module provided in an embodiment of the present application;

[0039] FIG35 is a schematic diagram of a mold structure according to an embodiment of a method for manufacturing a near-eye display module provided in an embodiment of the present application;

[0040] FIG36 is a schematic diagram of a mold structure according to another embodiment of a method for manufacturing a near-eye display module provided in an embodiment of the present application;

[0041] FIG37 is a schematic diagram of a mold structure of another embodiment of a method for manufacturing a near-eye display module provided in an embodiment of the present application;

[0042] FIG38 is a schematic diagram of the structure of injecting molten material according to an embodiment of a method for manufacturing a near-eye display module provided in an embodiment of the present application;

[0043] FIG39 is a schematic structural diagram of mold pressing in accordance with an embodiment of a method for manufacturing a near-eye display module provided in an embodiment of the present application;

[0044] FIG40 is a schematic diagram of the main structure after demolding according to an embodiment of a method for manufacturing a near-eye display module provided in an embodiment of the present application;

[0045] FIG41 is a schematic diagram of the bottom-up structure of the main body after demolding according to an embodiment of the method for manufacturing a near-eye display module provided in an embodiment of the present application;

[0046] FIG42 is a schematic diagram of the bottom-up structure of the main body after demolding according to another embodiment of the method for manufacturing the near-eye display module provided in an embodiment of the present application;

[0047] FIG43 is a schematic diagram of a coating structure according to an embodiment of a method for manufacturing a near-eye display module provided in an embodiment of the present application;

[0048] FIG44 is a schematic diagram of a coating structure according to another embodiment of a method for manufacturing a near-eye display module provided in an embodiment of the present application;

[0049] FIG45 is a schematic diagram of the structure of installing a micro display according to an embodiment of a method for manufacturing a near-eye display module provided in an embodiment of the present application;

[0050] FIG46 is a schematic diagram of the structure of cutting according to an embodiment of a method for manufacturing a near-eye display module provided in an embodiment of the present application;

[0051] FIG47 is a schematic structural diagram of an embodiment of a near-eye display module provided in an embodiment of the present application;

[0052] FIG48 is a schematic flow chart of another embodiment of a method for preparing a near-eye display module provided in an embodiment of the present application;

[0053] 49 to 56 are schematic diagrams of orthographic structures corresponding to the steps in the method for preparing the near-eye display module provided in FIG. 48 ;

[0054] FIG57 is a schematic flow chart of another embodiment of a method for preparing a near-eye display module provided by the present application;

[0055] FIG58 is a left perspective structural diagram of an injection mold according to an embodiment of the present invention;

[0056] FIG59 is a left perspective structural diagram corresponding to FIG58 of an embodiment of the mold demolding;

[0057] FIG60 is a schematic structural diagram of another embodiment of a near-eye display module provided by the present application;

[0058] FIG61 is a flow chart of an embodiment of a method for manufacturing a near-eye display module provided in an embodiment of the present application;

[0059] FIG62 is a schematic diagram of a mold structure according to an embodiment of a method for manufacturing a near-eye display module provided in an embodiment of the present application;

[0060] FIG63 is a schematic diagram of a mold structure according to another embodiment of a method for manufacturing a near-eye display module provided in an embodiment of the present application;

[0061] FIG64 is a schematic structural diagram of mold pressing in accordance with an embodiment of a method for manufacturing a near-eye display module provided in an embodiment of the present application;

[0062] FIG65 is a schematic diagram of the optical substrate structure after demolding according to an embodiment of a method for manufacturing a near-eye display module provided in an embodiment of the present application;

[0063] FIG66 is a schematic diagram of the bottom-up structure of the main body after demolding according to the first embodiment of the method for manufacturing the near-eye display module provided in an embodiment of the present application;

[0064] FIG67 is a schematic diagram of the bottom-up structure of the main body after demolding according to another embodiment of the method for manufacturing the near-eye display module provided in an embodiment of the present application;

[0065] FIG68 is a schematic diagram of a coating structure according to an embodiment of a method for manufacturing a near-eye display module provided in an embodiment of the present application;

[0066] FIG69 is a schematic diagram illustrating the structure of installing a microdisplay according to an embodiment of a method for manufacturing a near-eye display module provided in an embodiment of the present application;

[0067] FIG70 is a schematic diagram of the structure of cutting according to an embodiment of a method for manufacturing a near-eye display module provided in an embodiment of the present application;

[0068] FIG71 is a schematic diagram of the packaging structure of an embodiment of a method for manufacturing a near-eye display module provided in an embodiment of the present application;

[0069] FIG72 is a schematic diagram of the packaging structure of an embodiment of a method for manufacturing a near-eye display module provided in an embodiment of the present application;

[0070] FIG73 is a schematic structural diagram of an embodiment of a near-eye display module provided in an embodiment of the present application;

[0071] Figure 74 is a structural schematic diagram of an embodiment of a mold for making an optical module provided in an embodiment of the present application. DETAILED DESCRIPTION

[0072] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0073] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0074] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0075] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0076] The optical module, near-eye display module and device, and near-eye display module manufacturing method provided in the embodiments of the present application are now described.

[0077] Referring to FIG. 1 , the present application provides an optical module 10 for use in a near-eye display module, comprising: a first reflective window 2 configured to reflect light; a second reflective window 4 spaced apart from and facing the first reflective window 2 at opposite ends of the first reflective window 2, the second reflective window 4 configured to receive light reflected from the first reflective window 2. It is understood that the first reflective window 2 and the second reflective window 4 may be coated with a reflective layer or reflective material to reflect light, and the first reflective window 2 and the second reflective window 4 may be spherical, aspherical, or non-curved (specular) in shape. An incident window 5 is disposed at the center of the second reflective window 4 and aligned with the first reflective window 2, i.e., the incident window 5 and the first reflective window 2 are also centrally aligned. The incident window 5 is configured to allow light to enter the space formed by the first reflective window 2 and the second reflective window 4; and an exit window 3 is disposed parallel to the incident window 5 and surrounds the first reflective window 2. The exit window 3 is configured to allow light to exit the space formed by the first reflective window 2 and the second reflective window 4, which may be solid or hollow. It is understood that the first reflective window 2 in the present application can also be described as a primary reflective mirror or a first reflective surface, and the second reflective window 4 can also be described as a secondary reflective mirror or a second reflective surface. Among them, the incident window 5 is used to install the micro display 6. The light of the micro display 6 is incident on the first reflective window 2 through the incident window 5, and is reflected by the first reflective window 2 to the second reflective window 4 and then emitted through the exit window 3. It is understood that the incident window 5 and the exit window 3 can be entities and made of the same material. For example, the material used for the entire optical module can be a transparent or light-transmitting hard and machinable material, such as PMMA (polymethyl methacrylate), PC (polycarbonate) plastic, resin, glass, etc. It should be understood that the incident window 5 and the exit window 3 can also be understood as virtual entities, for example, as an opening of a physical part, as long as it can meet the corresponding light incidence and light emission. The optical module 10 as a whole can be cylindrical, for example, it can be a regular shape such as a cylinder, a prism or a truncated cone, or of course it can also be an irregular shape, and the formed whole can have a relative parallel first end 11 and second end 12.

[0078] It is understood that the first reflective window 2 can be any one of an inclined surface, a spherical surface, an aspherical surface, or a free-form surface; wherein the first reflective window 2 and the exit window 3 are not coplanar, that is, they are not in the same plane; the second reflective window 4 can be any one of an inclined surface, a spherical surface, an aspherical surface, or a free-form surface; the second reflective window 4 and the incident window 5 are not coplanar, that is, they are not in the same plane; the first reflective window 2 and the second reflective window 4 can be formed by injection molding, turning, or photolithography. The schematic diagram of this application is only a cross-sectional reference schematic diagram. In the figure, the first reflective window 2 is curved, and the second reflective window 4 can be an inclined plane of an aspherical surface, or of course it can be curved.

[0079] The microdisplay 6 may be a Micro-LED (Micro Light-Emitting Diode), a ULED (Micro Light-Emitting Diode), a Micro-OLED (Micro Organic Light-Emitting Diode), an LCoS (Liquid Crystal On Silicon), an LCD (Liquid Crystal Display), a DMD (Digital Micromirror Device) / DLP (Digital Light Processing), or an LBS (Laser Beam Scanning), or any combination of these technologies. The microdisplay 6 may provide an image source, such as text, video, information prompts, and the like.

[0080] After entering through the incident window 5, light L is first reflected by the first reflective window 2, then by the second reflective window 4, before exiting through the exit window 3. This folded optical path does not affect light transmission. Folding the optical path through the primary and secondary reflective windows effectively reduces the overall volume. This small size can be installed on other devices without significantly impacting them, such as significantly changing the appearance or structure of the original device and causing an undue impact on other devices.

[0081] In some embodiments, the reflective layer or reflective material coated on the first reflective window 2 and the second reflective window 4 can be a metal or metal alloy, such as aluminum, silver, or a mixture of aluminum and silver. Of course, other metal oxides such as aluminum oxide, or dielectric materials such as silicon dioxide and titanium oxide, or highly reflective polymer materials, or special coating materials are also feasible. In this application, the emissive layer or reflective material can be understood in the same way.

[0082] In some embodiments, referring to Figure 1, the optical module 10 also includes a side wall 1, which can be annular. One end of the side wall 1 is connected to the exit window 3, and the other end opposite to the side wall 1 is connected to the second reflective window 4, wherein the area enclosed by the first reflective window 2, the exit window 3, the side wall 1, the second reflective window 4, and the incident window 5 is a solid uniform light-transmitting (or transparent) medium, such as transparent PMMA (polymethyl methacrylate), PC (polycarbonate) plastic, resin glass, etc. The reflective material of the first reflective window 2 and the second reflective window 4 is arranged on the side away from the solid light-transmitting medium. It can be understood that the first reflective window 2 can be formed by being recessed relative to a solid transparent substrate. For example, the shapes of the first reflective window 2 and the second reflective window 4 can be formed by processes such as cutting and injection molding, and then the reflective material or reflective layer can be directly set on the surface by coating or vacuum coating or physical vapor deposition or chemical vapor deposition or electroplating or chemical plating. For example, in Figure 1, the first reflective window 2 is a solid recessed setting, and the reflective material is set in the direction of the plane of the exit window 3, wherein the solid uniform light-transmitting or transparent medium can ensure that the light L propagates (reflects) in the uniform same medium without refraction or dispersion, etc., and can also ensure that the entire optical module 10 is more solid.

[0083] In some embodiments, the incident window 5 can be a plane, and the second reflective window 4 can be a plane, a spherical surface, an aspherical surface, or a free-form surface, etc., and the incident window 5 and the second reflective window 4 are two different surfaces; in other embodiments, the incident window 5 can be a spherical surface, an aspherical surface, or a free-form surface, etc., and the incident window 5 and the second reflective window 4 together constitute a continuous surface, and the incident window 5 and the second reflective window 4 can be designed by the same function in optical design, for example, generated by Zernike polynomials. In some embodiments, the exit window 3 can be a plane, and the first reflective window 2 can be a spherical surface, an aspherical surface, or a free-form surface, etc., and the exit window 3 and the first reflective window 2 are two different surfaces; in other embodiments, the exit window 3 can be a spherical surface, an aspherical surface, or a free-form surface, etc., and the exit window 3 and the first reflective window 2 together constitute a continuous surface, and the exit window 3 and the first reflective window 2 can be designed by the same function in optical design, for example, generated by Zernike polynomials. In other embodiments, the first reflection window 2 and the incident window 5 can be the same surface, for example, both are planes, or both are spherical, aspherical or free-form surfaces. The contour shapes of the incident window 5 and the first reflection window 2 can be the same, for example, polygonal, circular or elliptical, etc. The first reflection window 2 and the incident window 5 can be designed by the same function. In some embodiments, the first reflection window 2, the exit window 3, the second reflection window 4, and the incident window 5 can be designed by the same function, for example, generated by Zernike polynomials.

[0084] In some embodiments, referring to Figure 2, the optical module 10 also includes a side wall 1, one end of the side wall 1 is connected to the exit window 3, and the other end opposite to the side wall 1 is connected to the second reflective window 4, wherein the area enclosed by the first reflective window 2, the exit window 3, the side wall 1, the second reflective window 4, and the incident window 5 is hollow, and the reflective material of the first reflective window 2 is arranged on the side facing the hollow area, and the reflective material of the second reflective window 4 is arranged on the side facing or away from the hollow area. It can be understood that the solid first reflective window 2 and the exit window 3 can be formed as a whole by injection molding or turning, and then the reflective material or reflective layer can be set on the surface of the first reflective window 2 by coating or vacuum coating or physical vapor deposition or chemical vapor deposition or electroplating or chemical plating, and then a similar process is used to form the solid second reflective window 4 side wall 1. The reflective material can be set on the front or back side of the second reflective window 4 by coating or vacuum coating or physical vapor deposition or chemical vapor deposition or electroplating or chemical plating, and finally the two wholes of the reflective material are fixed, for example, by bonding, to form a hollow optical module. For example, in Figure 2, the first reflective window 2 is located in the hollow area, and the reflective material is also facing the hollow area (i.e., facing the incident window); wherein, the hollow setting can reduce the weight of the optical module 1, further facilitate its assembly to other wearable devices, and of course, it can also reduce materials. On the other hand, it also improves the overall production process from another perspective.

[0085] The lateral dimensions of the first reflective window 2 are equal to or greater than those of the incident window 5, and the centers of the first reflective window 2 and incident window 5 are aligned. The lateral dimensions of the first reflective window 2 are equal to or greater than those of the microdisplay 6. The dimensions between the first reflective window 2, the exit window 3, the sidewall 1, the second reflective window 4, and the incident window 5 are between 1 cubic millimeter and 1 cubic centimeter. This size appears relatively small to the naked eye, making it easy to integrate into various other devices, such as glasses, without affecting the appearance of the original device or large-area structures, and providing a good fit.

[0086] In some embodiments, referring to Figures 1, 2, and 4, the lateral dimension of the first reflective window 2 is greater than or equal to that of the incident window 5, and the centers of the first reflective window 2 and the incident window 5 are aligned. The lateral dimension of the first reflective window 2 is greater than or equal to that of the microdisplay 6. This satisfies the requirement that all light L from the incident window 5 can be reflected by the first reflective window 2. If the lateral dimension of the first reflective window 2 is smaller than the incident window 5 (or the installed microdisplay 6, such as in Figure 4), light entering from the incident window 5 and directly exiting from the exit window 3 will partially overlap with light entering from the incident window 5, passing through the first reflective window 2 and the second reflective window, and then directly exiting from the exit window 3, thereby affecting the final image. If this effect is acceptable, it is acceptable for the lateral dimension of the first reflective window 2 to be appropriately smaller than that of the microdisplay 6.

[0087] The microdisplay 6 has a resolution of no less than 2 arc minutes per pixel of the wearer's field of view, and the pixel-to-pixel pitch of the microdisplay does not exceed 5 microns.

[0088] In some embodiments, the microdisplay 6 may include an array of luminous pixels. In some embodiments, the pixel-to-pixel pitch of the microdisplay is no greater than 4 microns. The magnification of the image projected by the microdisplay 6 is no less than 2.5, for example, the image source is magnified 3, 4, or 10 times before reaching the retina, ensuring that the content of the projected image is clearly visible, as measured from the projected image of the microdisplay 6 to the wearer's retina. The projected image of the microdisplay 6 covers a field of view of at least 8° for the wearer, such as 8°, 15°, 20°, etc.; it does not occupy the entire 60° field of view of the human eye, ensuring that the wearer can see both the projected image and the image of the real situation.

[0089] In some embodiments, as shown in Figures 3, 5, and 6, the optical module further includes a first non-transmissive layer 71 that does not allow light to pass through. The first non-transmissive layer 71 covers and shields the sidewall 1, allowing only the entrance window 5 and the exit window 3 to leak out of the first non-transmissive layer 71. The first non-transmissive layer 71 can be integral with the sidewall 1, for example, the outer side of the sidewall 1 itself is non-transmissive; or the first non-transmissive layer 71 can be separately provided on the sidewall 1 by, for example, coating, plating, or other packaging. The first non-transmissive layer 71 can be made of a black or other non-transmissive material, for example, black epoxy resin or black silicone rubber. The first non-transmissive layer 71 is flush with the second reflective window 4 and the exit window 3, and allows the incident window 5 and the exit window 3 to leak out of the first non-transmissive layer 71, ensuring that the entire circumferential sidewall 1 is fully enclosed and preventing light L from emitting from the sidewall 1, thereby reducing the loss of light ultimately emitted from the exit window 3. Of course, the lateral dimensions of the incident window and the exit window 3 are equal to those of the second reflective window 4, which facilitates the formation of a regular shape and facilitates subsequent packaging or adaptation to other devices. Of course, to achieve all-round shielding, the non-reflective surface of the second reflective window 4 can also be enclosed by the first non-transmissive layer 71. Figure 3 is merely an example of the first non-transmissive layer 71. The first non-transmissive layer 71 can be a coating or material such as black epoxy resin, black silicone rubber, carbon black, nickel black, black chrome, or Vanta black. Of course, it can also be an opaque sealing sleeve 70, etc.

[0090] With reference to Figures 4-6, the present application also provides a near-eye display module 100, which includes a microdisplay 6 and the optical module 10 described above, wherein the microdisplay 6 is arranged at the position of the incident window 5 of the optical module 10, for example, the microdisplay 6 and the incident window 5 are coaxially arranged, and the microdisplay 6 can provide an image source. The near-eye display module 100 can be used in head-mounted devices such as smart glasses, sunglasses, sports glasses, myopia glasses, sunglasses or helmets, or in head-up displays or other optical or display devices. The description of the optical module 10 and the microdisplay 6 can be referred to the above embodiments and will not be repeated here.

[0091] In some embodiments, referring to Figures 4-5 , the near-eye display module 100 may further include an intermediate layer 62, which is positioned between the microdisplay 6 and the incident window 5 to bond the microdisplay 6 to the incident window 5. The intermediate layer 62 may be a transparent optical glue, which serves to secure the microdisplay 6 to the optical module 1 without causing optical loss. Of course, if the microdisplay 6 and the incident window 5 are pressed tightly enough, the intermediate layer may not be present. In some embodiments, the intermediate layer may also be air, and the microdisplay 6 may be secured by an external package or sleeve.

[0092] In some embodiments, referring to Figures 4-5, the near-eye display module 100 may further include a backplate 61. The backplate 61 is located on the side of the microdisplay 6 facing away from the incident window 5 and is electrically connected to the microdisplay 6. The backplate 61 may be a driving board such as a circuit board, which may be rigid or flexible. The backplate 61 is used to connect to a driving power supply to provide electrical drive for the microdisplay 61. The backplate 61 may be larger than or equal to the microdisplay 6 (e.g., a light-emitting device). Of course, the size of the backplate 61 is preferably matched to the overall size to ensure a more regular shape or facilitate subsequent packaging.

[0093] In some embodiments, referring to Figures 4-6 , the near-eye display module 100 may further include a second non-transmissive layer 72. The second non-transmissive layer 72 fills the gaps between the microdisplay 6, backplate 61, intermediate layer 62, and second reflective window 4. The second non-transmissive layer 72 allows at least a portion of the backplate 61 to be exposed, facilitating connection to external circuitry (e.g., a driver or power supply). The second non-transmissive layer 72 can pre-position and encapsulate the optical module 10, microdisplay 6, backplate 61, and intermediate layer 62 as a whole, reducing the likelihood of component misalignment. Of course, the microdisplay 6 and intermediate layer 62 can also be appropriately encapsulated to prevent light leakage. The second non-transmissive layer 72 can be made of the same material as the first non-transmissive layer 71, such as black epoxy resin or black silicone rubber. It is understood that the first and second non-transmissive layers 71 and 72 can be integrally formed. For example, the non-transmissive layer 71 can be omitted from the optical module 10 and directly incorporated into the near-eye display module 100, i.e., they can be integrally formed.

[0094] In some embodiments, as shown in FIG6 , the near-eye display module 100 may further include a protective light-transmitting layer 8 , which is disposed on the end face of the exit window 3 and covers the exit window 3 and the first reflective window 2 . It is understood that the light-transmitting layer 8 may be fixed by, for example, gluing or snapping, and may be made of a light-transmitting or transparent material. It may not change the propagation path of the original light, but may protect the exit window 3 and the first reflective window 2 , reduce wear and tear on them, and reduce the ingress of dust and other debris into the first reflective window 2 to affect its reflection efficiency. It is understood that the descriptions herein of the protective light-transmitting layer, light-transmitting layer, or protective layer may be interpreted in the same or similar manner.

[0095] In some embodiments, referring to Figures 4-6, the first non-transmissive layer 71 and the second non-transmissive layer 72 can also be understood as an encapsulation layer. In some embodiments, the first non-transmissive layer 71, the second non-transmissive layer 72, or the encapsulation layer can fill the gap between the second reflective window 4 and the back plate 61. For example, when they are made of black epoxy resin or black silicone rubber, the gap can be filled, allowing at least a portion of the exit window 3 and the back plate 61 to leak out relative to the first non-transmissive layer 71, the second non-transmissive layer 72, or the encapsulation layer, for example, to ensure that the wires of the back plate 61 can leak out. The first non-transmissive layer 71, the second non-transmissive layer 72, or the encapsulation layer is configured to fix the second reflective window 4, the micro display 6, and the back plate 61, so as to achieve overall pre-positioning and encapsulation of the optical module 10, the micro display 6, and the back plate 61, thereby reducing the probability of positional displacement of each component. The above encapsulation can ensure that the entire near-eye display module is cylindrical or prismatic, etc. Of course, the near-eye display module can also be an irregular shape composed of a plate, a cylinder, or other shapes (for example, as described in the relevant embodiments below).

[0096] In some embodiments, referring to FIG. 7 , the first non-transmissive layer 71, the second non-transmissive layer 72, or the encapsulation layer can be replaced with a sleeve 70. Specifically, the annular sidewall 1, the second reflective window 2, the microdisplay 6, and the backplate 61 are located within the sleeve 70, with the leads of the backplate 61, the first reflective window 2, and the exit window 3 exposed relative to the sleeve. It is understood that the bottom of the sleeve can be provided with through-holes to facilitate electrical connection between the leads of the backplate 61 and the microdisplay 6 through the through-holes.

[0097] The overall size of the first reflective window 2, the second reflective window 4, the incident window 5, the exit window 3, the sidewall 1, the microdisplay 6, and the light-transmitting layer 8 is between 0.5 cubic millimeters and 5 cubic centimeters, for example, 0.5 cubic millimeters, 1 cubic millimeter, 8 cubic millimeters, 1 cubic centimeter, 2 cubic centimeters, 5 cubic centimeters, etc. This size appears relatively small to the naked eye and is easily integrated into various other devices, such as glasses or other head-mounted devices, without affecting the appearance or large-area structure of the original device, providing a good fit. In some embodiments, the above overall size may also include the first non-transmissive layer 71, the second non-transmissive layer 72, or the encapsulation layer.

[0098] In some embodiments, referring to the figures, the near-eye display module 100 may further include a first housing 110, which is provided with a first connecting portion 112. The first connecting portion 112 may be a thread, a slider, a protrusion, an elastic pin, etc.; the optical module 10 is provided with a second connecting portion 101. The second connecting portion 101 may be a thread, a slot, a protrusion, etc., as long as it can be mutually compatible with the first connecting portion 112. The second connecting portion 101 is integrally formed with the optical module 10, and the first connecting portion 112 and the second connecting portion 101 cooperate with each other to adjust the distance between the microdisplay 6 and the incident window 5. In some embodiments, the sleeve and the first housing 110 can have the same or similar functions. Through the mutual cooperation between the first connecting portion 112 and the second connecting portion 101, such as threaded cooperation, slot cooperation, elastic sliding cooperation, or a screw, the distance between the optical module 10 and the microdisplay 6 of the folded optical path can be adjusted, thereby making the overall imaging effect adjustable to meet different design or wearing requirements.

[0099] The first connection portion 112 may include a first thread, which is integrally formed with the first housing 110. For example, it may be a thread formed by injection molding or cutting of the first housing 110. The second connection portion 101 includes a second thread, which is integrally formed with the sidewall 1 and / or the exit window 3 and the human-injection window 5. It is understood that the sidewall 1, the exit window 3, and the human-injection window 5 may be integrally molded. The second thread is an integrally molded structure formed on the sidewall 1. Alternatively, in some embodiments, the sidewall 1 and the exit window 3 are separately manufactured, and then the sidewall 1 and the exit window 3 are bonded together. In this case, an integrally formed second thread may be formed on the sidewall 1. The thread may be formed, for example, by cutting or injection molding. The first and second threads cooperate with each other to adjust the distance between the microdisplay 6 and the human-injection window 5. It is understood that in the embodiment of the present application, no additional sleeve structure is required. The first thread is directly formed on the first housing 110, and the second thread is formed on the corresponding side surface of the circumferential outer edge of the optical module 10. The two threads cooperate to achieve distance adjustment. This effectively reduces the formation of related components (such as sleeves), which is conducive to forming a smaller optical module, thereby making the weight of the entire near-eye display module 100 lighter and reducing costs related to sleeve mold opening.

[0100] In some embodiments, the second thread does not occupy the entire side wall 1 , and may be located near the middle of the side wall 1 or near the middle of the side wall 1 and the second reflective window 4 .

[0101] In some embodiments, the first connection portion 112 includes a first thread, which is integrally formed with the first housing 110. The second connection portion 101 includes a sleeve (not shown) that is mounted on the sidewall 1 and has a second thread on the side of the sleeve facing away from the sidewall 1. The first and second threads engage with each other to adjust the distance between the microdisplay 6 and the viewing window 5. It is understood that to protect the sidewall 1, a sleeve can be provided on the sidewall 1 and threadedly connected to the first thread of the first housing 110, effectively reducing damage to the optical module 10.

[0102] In some embodiments, referring to FIG. 11 , the near-eye display module 100 further includes a flexible member 130 . The flexible member 130 can be made of an elastic material such as plastic or rubber. For example, the flexible member 130 can be annular. The flexible member 130 is sleeved on the second thread and positioned between the first and second threads. It is understood that when the optical module 10 is rotated to a predetermined distance and no longer rotated, the flexible member 130 can fit tightly between the first and second threads to prevent sliding. This helps ensure that the distance between the microdisplay 6 and the optical module 10's reflective window 5 remains fixed, even when the user is wearing the device and exercising. In some embodiments, the distance from the plane where the flexible member 130 lies to the reflective window 3 is greater than the distance from the reflective window 3 to the plane tangent to the lowest point of the first reflective window 2. This ensures that the flexible member 130 is sufficiently positioned between the first and second threads, preventing the flexible member 130 from being too high and unable to achieve close contact with the first and second threads. Optionally, a groove can be provided on the sidewall 1 , the height of the groove being at the middle of the first thread, and the flexible member 130 is assembled into the corresponding groove. In some embodiments, the flexible member, the elastic member, and the elastic ring may be understood as the same or similar.

[0103] In some embodiments, the first connecting portion 112 includes a protrusion that is retractable relative to the first housing 110. Referring to FIG14 , the second connecting portion 101 includes a plurality of grooves spaced apart from each other. The protrusions and grooves engage with each other to adjust the distance between the microdisplay 6 and the viewing window 5. It is understood that a spring may be provided on the protrusion. In a natural state, the protrusion may be located within the groove. When the distance needs to be adjusted, the protrusion is pulled to overcome the spring force so that the protrusion is disengaged from the groove. The protrusion is then placed in a groove of a desired height. The protrusion is released, and the spring force causes the protrusion to engage with the groove. In other words, different distance adjustments between the optical module 10 and the microdisplay 6 are achieved by engaging the protrusion with different grooves.

[0104] The dimensions enclosed between the first reflective window 2, the exit window 3, the sidewall 1, the second reflective window 4, the incident window 5, and the second connecting portion 101 are between 1 cubic millimeter and 1 cubic centimeter. In some embodiments, referring to Figures 8-14 , the lateral dimensions of the first reflective window 2 are greater than or equal to those of the incident window 5, the centers of the first reflective window 2 and the incident window 5 are aligned, and the lateral dimensions of the first reflective window 2 are greater than or equal to those of the microdisplay 6. This ensures that all light from the incident window 5 can be reflected by the first reflective window 2. If the lateral dimensions of the first reflective window 2 are smaller than the incident window 5 (or the mounted microdisplay 6, such as in Figure 4 ), light entering from the incident window 5 and directly exiting the exit window 3 will partially overlap with light entering from the incident window 5, passing through the first reflective window 2 and the secondary reflection surface, and then directly exiting the exit window 3, affecting the final image. If this effect is acceptable, then a lateral dimension of the first reflective window 2 that is appropriately smaller than that of the microdisplay 6 is also acceptable. Its size appears relatively small to the naked eye, and it is relatively easy to integrate into various other devices, such as glasses, without affecting the appearance or large-area structure of the original device, and has a good adaptation space.

[0105] In some embodiments, a light-proof layer is provided on the first connecting portion 112 and / or the second connecting portion 101. The light-proof layer comprises any coating or material selected from black epoxy resin, black silicone rubber, carbon black, nickel black, black chrome, or Vanta black. This ensures that the entire circumferential sidewall 1 is fully enclosed and prevents light from escaping from the sidewall 1, thereby reducing the final light output loss. In some embodiments, the light-proof layer may be a light-proof sealing sleeve, etc.

[0106] The present application provides a near-eye display module, comprising a housing; a first connecting portion provided on the housing; a microdisplay disposed on the housing, the microdisplay projecting light; an optical module spaced apart from the microdisplay, wherein the optical module comprises: a first reflective surface configured to allow light to be reflected; a second reflective surface spaced apart at opposite ends of the first reflective surface and facing the first reflective surface, the second reflective surface configured to receive light reflected from the first reflective surface; an incident surface disposed at the center of the second reflective surface and aligned with the first reflective surface, the incident surface configured to allow light to be incident on a space formed by the first and second reflective surfaces; an exit surface surrounding the first reflective surface, the exit surface configured to allow light to exit from the space formed by the first and second reflective surfaces; and a side surface, one end of the side surface connected to the exit surface and the other end opposite the side surface connected to the second reflective surface, the side surface being provided with a second connecting portion, wherein the first connecting portion and the second connecting portion cooperate to adjust the distance between the microdisplay and the incident surface. The first connecting portion and the second connecting portion enable adjustment of the distance between the optical module and the microdisplay, which fold the optical path, to be adjusted, thereby making the overall imaging effect adjustable.

[0107] 15-24 , the first housing 110 is provided with a mounting hole 110. The housing 110 can be made of materials such as plastic and metal.

[0108] Optical module 10 is at least partially located within mounting hole 110. Optical module 10 receives images from microdisplay 6 and projects them into the user's eye, such as the eye side 204 of near-eye display device 200 shown in FIG24. Optical module 10 can be made of a light-transmitting material such as epoxy resin or glass.

[0109] The flexible member 130 is elastic and is located in the mounting hole 110. The hardness of the material of the flexible member 130 can be less than the hardness of the material of the first housing 110 and the hardness of the material of the optical module 10. The flexible member 130 can be made of rubber, silicone, flexible plastic, etc. In other embodiments, it can also be made of easily curable glue, etc.

[0110] In some embodiments, the flexible member 130 is disposed around the optical module 10 and is fixedly connected to the optical module 10. The flexible member 130 is clamped between the inner wall of the mounting hole 110 and the optical module 10, and the flexible member 130 is tightly fitted with the inner wall of the mounting hole 110. The fitting of the flexible member 130 allows the optical module 10 to be fixed in the mounting hole 110 of the first housing 110. The optical module 10 and the inner wall of the mounting hole 110 are tightly fitted to each other, and the flexible member 130 is at least partially deformed in the circumferential direction and the axial direction. It can be understood that the flexible member 130 can have a first thickness in the circumferential direction and the axial direction before being inserted between the inner wall of the mounting hole 110 and the optical module 10. When the optical module 10 and the inner wall of the mounting hole 110 are brought close to each other for clamping, threaded connection or abutment to be tightly fitted, the inner wall of the optical module 10 and the mounting hole 110 are squeezed in the circumferential direction and the axial direction, thereby causing the flexible member 130 to be squeezed and deformed in both the axial direction and the circumferential direction. Of course, if the flexible member 130 is completely placed in the mounting hole 110, the entire circumferential direction and the axial direction of the flexible member 130 are Deformation can occur in the axial direction, so when the optical module 10 is installed in the mounting hole 110, the flexible part 130 can have a second thickness in the circumferential direction and the axial direction, and the second thickness is less than the first thickness. The change in thickness brings about a change in deformation, such as the flexible part 130 is squeezed and deformed, etc. This deformation may be irreversible. The flexible part 130 can improve the tight fit of the optical module 10 in the mounting hole 110. In addition, the flexible part 130 protects the optical module 10 and effectively prevents the optical module 10 from being squeezed and damaged, cracked, etc.

[0111] As shown in Figures 17 and 19, the optical module 10 includes a base 103, a flexible member 130 having a through hole 1303, and the base 103 being inserted into the through hole 1303. The through hole 1303 and the base 103 have the same cross-sectional shape. For example, the cross-sectional shapes of the through hole 1303 and the base 103 may be circular, rectangular, pentagonal, polygonal, or elliptical.

[0112] The cross-sectional area of ​​the substrate 103 remains constant along its axial direction; the cross-sectional area of ​​the through-hole 1303 remains constant along its axial direction. After the optical module 10 and through-hole 1303 are assembled, the axial directions of the optical module 10 and through-hole 1303 are substantially coaxial. In Figure 17 , the direction indicated by arrow a represents the axial direction of the substrate 103 and optical module 10. In the assembled state, the axial directions of the optical module 10 and through-hole 1303 are parallel or coaxial.

[0113] The inner wall of mounting hole 110 is provided with a first connecting portion 112, and the outer wall of base 103 is provided with a second connecting portion 101. First connecting portion 112 corresponds to and is fixedly connected to second connecting portion 101. First connecting portion 112 and second connecting portion 101 are interconnected and deform at least partially in the circumferential and axial directions of flexible member 130. The cooperation between the first connecting portion and the second connecting portion achieves a fixed connection between optical module 10 and the inner wall of mounting hole 110, and deforms and fixes flexible member 130 between the optical module 10 and the inner wall of mounting hole 110.

[0114] In some embodiments, referring to FIG. 17 , the first connecting portion 112 is threadedly connected to the second connecting portion 101. The first connecting portion 112 may include an internal thread 311, and the second connecting portion may include an external thread 211. Due to the threaded connection, the internal thread 311 and the external thread 211 are threadedly connected to each other and deform the flexible member 130 at least partially in the circumferential and axial directions. Therefore, the internal and external threads squeeze and deform the flexible member 130. The cross-sectional shapes of the through hole 1303 and the base 103 are both circular or elliptical. In some embodiments, the internal thread 311 can be formed by hot-melt tapping, and the external thread 211 can be formed by thread rolling. In some embodiments, the internal and external threads 211 are formed by material removal methods such as turning, milling, and grinding. In some embodiments, the internal and external threads 211 are formed by mold forming or a combination of the above.

[0115] In other embodiments, the first connecting portion 112 is engaged with the second connecting portion 101. The first connecting portion may further include a first engaging structure, and the second connecting portion may further include a second engaging structure. In the first engaging structure and the second engaging structure, one is a protrusion and the other is a recess. The protrusion and the recess engage with each other and deform the flexible member at least partially in the circumferential and axial directions, i.e., the protrusion and the recess engage and deform the flexible member 130.

[0116] The flexible member 130 is a cylindrical structure and includes a first end 1301 and a second end 1302, which are located at opposite ends of the flexible member 130 in the axial direction. The first end 1301 is closer to the light-emitting side of the optical module 10 than the second end 1302. Referring to Figure 17 , the side indicated by arrow a is the light-emitting side of the optical module 10.

[0117] As shown in FIG. 20 , in some embodiments, along the axial direction of the flexible member 130 and from the first end 1301 to the second end 1302 , the wall thickness of the flexible member 130 remains consistent.

[0118] As shown in FIG21 , in other embodiments, the wall thickness of the flexible member 130 gradually increases along the axial direction of the flexible member 130, from the first end 1301 to the second end 1302. Due to the change in the wall thickness of the flexible member 130, when the first housing 110, the flexible member 130, and the optical module 10 are assembled, the closer the flexible member 130 is to the second end 1302, the tighter the flexible member 130 is clamped by the mounting hole 110 and the optical module 10, thereby effectively improving the fixing effect between the three and effectively preventing loosening.

[0119] In some embodiments, the first housing 110 further defines a mounting slot 114, wherein the mounting hole 110 is aligned with and communicates with the mounting slot 114. The mounting slot 114 is used to mount the microdisplay 6, which is at least partially located within the mounting slot 114. The optical module 10 is located on the light-emitting side of the microdisplay 6. It will be appreciated that light generated by the microdisplay 6 passes through the optical module 10 and enters the user's eye, i.e., the human eye side 204 of the near-eye display device 200.

[0120] As shown in Figure 10, in some embodiments, a flange 105 is provided at one end of the base 103 for position limiting. The flange 105 is provided to protrude circumferentially from the base 103, for example, extending all the way around the end of the base 103. Therefore, when picking up, contacting, and installing the optical module 10, the flange 105 can be directly contacted without contacting the base 103, thereby reducing the possibility of damage to the base 103. The flange 105 is located outside the through hole 1303. In some embodiments, the side surfaces of the flange 105 may be opaque. This opaque side surface of the flange 105 can reduce light loss and improve the light extraction efficiency of the optical module 10.

[0121] The flange 105 abuts against the end wall of the mounting hole 110. For example, the end surface of the flange 105 facing the mounting hole 110 abuts against the end wall of the mounting hole 110 away from the microdisplay 6, that is, it abuts against the outer surface of the mounting hole 110, so that a gap is created between the base 103 and the microdisplay 6. In this way, during assembly, the flange 105 abuts against the end wall of the mounting hole 110, preventing the base 103 from contacting the microdisplay 6. This prevents the base 103 from touching the microdisplay 6, thereby protecting the microdisplay 6. Among them, the end face of the flexible part 130 may not exceed the end face of the flange 105, for example, the end face of the flexible part 130 is flush with the end face of the flange 105, or the end face of the flexible part 130 is lower than the end face of the flange 105. Therefore, the base 103 can be conveniently placed into the flexible part 130 from the end of the flange 105, which is conducive to clamping the flange 105 to fix the optical module 10 and the flexible part 130 into the mounting hole 110.

[0122] In some embodiments, an adjusting portion 107 is provided on the outer circumference of the flange 105 . The adjusting portion 107 is configured to drive the optical module 10 to move relative to the first housing 110 .

[0123] The flange 105 is located outside the through hole 1303. When it is necessary to adjust the position of the microdisplay 6 and the first shell 110, or to disassemble the microdisplay 6 module, the user can directly use tools to act on the flange 105 to adjust or disassemble the microdisplay 6, thereby avoiding wear or damage to the optical module 10. The adjustment portion 107 can be a planar structure, a convex structure or a concave structure, wherein the number of the adjustment portion 107 is one or more. The number of the adjustment portion 107 may include a plurality of adjustment portions spaced apart along the flange 105, for example, the adjustment portion 107 may be a planar structure, there are two adjustment portions 107 and they are arranged in parallel, the adjustment portion 107 may include at least one pair of mutually parallel planes, and of course other numbers of planar structures arranged circumferentially along the flange 105 are also feasible. The user or during production, for example, can use tweezers or clamps to act on the adjustment portion 107 to adjust the position of the optical module 10.

[0124] As shown in Figure 18, a sliding portion 150 is provided on the first shell 110, and the sliding portion 150 is configured to allow mutual cooperation with an external matching portion to drive the first shell 110 to move. For example, the matching portion is provided on a wearable item such as a frame or a helmet, wherein the first shell 110 can be moved relative to the wearable item through the mutual cooperation between the sliding portion 150 and the matching portion, thereby adjusting the position of the first shell 110 on the wearable item. In some embodiments, the sliding portion 150 protrudes toward the side away from the flexible member 130. There are two sliding portions 150, wherein the flexible member 130 is configured to be installed between the two sliding portions 150. Correspondingly, in order to cooperate with the sliding portion 150, the matching portion includes a slide groove structure.

[0125] In some embodiments, referring to Figures 16, 17, and 22, the first housing 110 may include a front cover 113 and a rear cover 115. A mounting slot 114 is formed between the front cover 113 and the rear cover 115. The front cover 113 is provided with a mounting hole 120. The mounting slot 114 communicates with the mounting hole 120. The microdisplay 6 is at least partially located within the mounting slot 114. In other embodiments, the rear cover 115 and the back plate may also be understood to have the same or similar functions.

[0126] During assembly, the back cover 115 fits against the microdisplay 6, thereby dissipating heat for the microdisplay 6. In the following embodiment, the back cover 115 may also be provided with a plurality of heat dissipation structures 119, and the plurality of heat dissipation structures 119 may be distributed in an array. In some embodiments, the heat dissipation structure 119 protrudes from the side of the back cover 115 away from the mounting groove 114. In other embodiments, the heat dissipation structure 119 may be recessed into the back cover. By providing the heat dissipation structure 119 on the back cover 115, the contact area between the first shell 110 and the air can be increased, thereby improving the heat dissipation efficiency. The array distribution of the heat dissipation structure 119 can make the heat dissipation of the back cover 115 more uniform, thereby avoiding local overheating. The back cover 115 can also be made of a material with excellent thermal conductivity such as metal, such as copper, aluminum, etc.

[0127] In some embodiments, the first housing 110 further includes fasteners 1170. The front cover 113 and the rear cover 115 are each provided with fastening holes 117. The fasteners 1170 penetrate through the fastening holes 117 to secure the front cover 113 and the rear cover 115. The fasteners 1170 may include screws, etc. The fasteners 1170 cooperate with the fastening holes 117 to securely connect the front cover 113 and the rear cover 115. After the microdisplay 6 is mounted in the mounting slot 114, the front cover 113 and the rear cover 115 are securely connected. This restricts the movement of the microdisplay 6 and secures the microdisplay 6 to the first housing 110.

[0128] As shown in Figures 17, 22 and 23, the near-eye display module 100 includes a microdisplay 6, an electrical wire 140 and a circuit board 62. The microdisplay 6 is installed in the mounting groove 114 and is thermally coupled to the back cover 115. The circuit board 62 is located outside the mounting groove 114. One side of the mounting groove 114 is connected to the mounting notch 116. The microdisplay 6 is passed through the mounting notch 116 through the electrical wire 140 and is electrically connected to the circuit board 62.

[0129] The microdisplay 6 is positioned within the mounting slot 114, the electrical wires 140 may be partially exposed relative to the mounting slot 114, and the circuit board 62 may be positioned outside the mounting slot 114. In other embodiments, the circuit board 62 may be positioned or partially positioned within the mounting slot 114, while the electrical wires 140 are at least partially exposed. The electrical wires 140 may be electrically connected to electrical components such as a power supply or a main control board.

[0130] In some embodiments, the microdisplay 6 is electrically connected to an electrical conductor 140, and a mounting notch 116 is connected to one side of the mounting groove 114, and the mounting notch 116 is used to accommodate the electrical conductor 140. The electrical conductor 140 can be made of a flexible material. The electrical conductor 140 is electrically connected to the circuit board 62, and transmits the electrical energy of the circuit board 62 to the microdisplay 6, so that the microdisplay 6 can operate normally. The circuit board 62 includes a power supply circuit board 62 and a power supply. In some embodiments, the circuit board 420 can be a driving board for driving the microdisplay 6, wherein the electrical conductor 140, the power supply circuit board 62 and the power supply are electrically connected in sequence. The power supply can include a rechargeable battery or a disposable battery, etc., and the power supply or battery can be set in the temple 203 of the near-eye display device 200.

[0131] As shown in Figure 24, in some embodiments, this application also proposes a near-eye display device 200, comprising a second housing 201 and the near-eye display module 100 described above. The second housing 202 includes an ambient side 205 and an eye side 204. The light-emitting side of the near-eye display module 100 faces the eye side 204, and the near-eye display module 100 is disposed on the second housing 201. The second housing 201 can be, for example, the main housing of a device such as ordinary glasses, smart glasses, or a helmet. In some embodiments, the near-eye display device 200 can also include temples 203, an upper frame 201, and a lower frame 202. Electrical components such as circuit boards and batteries can be located on the temples 203. In other embodiments, the near-eye display module 100 can also be fixed to the lens to function as a near-eye display. In some embodiments, the second housing 201 can be a frame. Other components of the near-eye display device 200, such as the communication unit and housing unit, are not further described in this application. In some other embodiments, the near-eye display module 100 may be detachably fixed to the second housing 201 .

[0132] The present application also provides a method for manufacturing a near-eye display module 10 , which is used to manufacture the near-eye display module 10 as described in the above embodiment, comprising: providing a substrate 1100 to be processed, comprising a first surface 1200 and a second surface 1300 ;

[0133] As shown in Figure 25 , substrate 1100 can be made of a transparent or translucent hard, machinable material, such as PMMA (polymethyl methacrylate), PC (polycarbonate) plastic, or resin. Substrate 1100 can have a regular shape, such as a cylinder, prism, or truncated cone. Of course, irregular shapes are also possible, as long as they facilitate positioning and processing. Substrate 1100 can be made of any of PMMA, polycarbonate, plastic, or resin. First surface 1200 and second surface 1300 can be opposing surfaces.

[0134] The first surface 1200 of the substrate 1100 is cut to form a first structured surface 1220 ; wherein the first structured surface 1220 includes an exit window 3 and a first reflection window 2 , and the exit window 3 surrounds the first reflection window 2 ;

[0135] It can be understood that, referring to Figure 26, the substrate 1100 to be processed can be installed on the positioning member 1010. The positioning member can be a tooling fixture, jig or other fixing parts to achieve positioning or fixing of the substrate 1100. Of course, a groove + plate positioning or fixing method can also be used. The first surface 1200 of the substrate 1100 to be processed is cut to form a first structural surface 1220. The first structural surface 1220 can be a recessed area formed by cutting off excess material from the center of the substrate 1100; the positioning member 1010 can be positioned, clamped or fixed on other surfaces other than the first surface 1200, such as the surface opposite to the first surface 1200 and / or its side. Specifically, the formed first structured surface 1220 may include an exit window 3 and a first reflective window 2, with the first reflective window 2 located at the center of the exit window 3 and surrounding the first reflective window 2. The exit window 3 may be horizontal, and the first reflective window 2 may be spherical, aspherical, or a free-form surface, and the curved surface of the first reflective window 2 is curved away from the first surface 1200. Taking the flat first surface 1200 of the cylindrical base 1100 as an example, the distance between the exit window 3 and the plane of the first surface 1200 is less than the distance between the first reflective window 2 and the plane of the first surface 1200. In the example of FIG. 25 , the first reflective window 2 protrudes toward the direction of the initially positioned positioning member 1010. During cutting, a groove with a uniform height may be first cut (this process may always use fixed-position cutting) to form a flat exit window 3, and then a spherical or aspherical groove may be further cut in the center of the exit window 3 to form the first reflective window 2. This process may involve adjusting the relative distance between the cutting tools or using a customized tool head.

[0136] In other embodiments, the exit window 3 may also be a spherical, aspherical, or free-form surface. The exit window 3 and the first reflective window 2 together constitute a continuous surface, which can be designed using the same function in optical design, for example, generated using Zernike polynomials. In this embodiment, the first structured surface 1220 may be cut into a continuous surface rather than a plane, such as a spherical, aspherical, or free-form surface. It can also be designed using the same function, for example, generated using Zernike polynomials.

[0137] In some implementations, during cutting, the substrate to be processed 1100, such as that in FIG. 4 , can also be cut to form a concave spherical or aspherical first reflective window 2. At this time, the area located on the periphery of the first reflective window 2 is the exit window 3, that is, the exit window 3 does not need to be concavely cut relative to the first surface 1200, and the first surface 1200 can be directly used as the exit window 3.

[0138] The second surface 1300 of the substrate 1100 is cut to form a second structured surface 1310 ; wherein the second structured surface 1310 includes an incident window 5 and a second reflective window 4 , and the second reflective window 4 surrounds the incident window 5 ;

[0139] As shown in FIG27 , a substrate 1100 to be processed is mounted on a positioning member 1010, and a second surface 1300 of the substrate 1100 to be processed is cut to form a second structural surface 1310. The second structural surface 1310 can be a central raised surface formed by removing excess portions from the periphery of the substrate 1100. The first surface 1200 and the second surface can be two opposing surfaces. It can be understood that the location removed from the first surface 1200 is the center, while the location removed from the second surface 1300 is the corresponding periphery. Furthermore, the projected area of ​​the cut second structural surface 1310 on the first structural surface 1220 can be less than or equal to the area of ​​the first structural surface 1220. In this step, the position of the substrate 1100 within the positioning member 1010 can be different from the position of the positioning member 1010 during the cutting of the first structural surface. It is understood that the substrate 1100 to be processed can be positioned, clamped, or fixed to a surface other than the second surface 1300, such as the first surface 1200. That is, after the first surface 1200 is cut to form the first structural surface 1220, the substrate 1100 can be inverted and the other surface can be processed. Of course, if it can be ensured that it is always clamped to the side of the main body without affecting the cutting of the two opposing surfaces, this is also acceptable. Figure 26 is for illustration; the dashed lines represent the cut portion, while the solid line portion within the dashed box remains.

[0140] In some embodiments, the second reflective window 4 may include one of a plane, a spherical surface, an aspherical surface, or a free-form surface, and the incident window 5 may include one of a plane, a spherical surface, an aspherical surface, or a free-form surface. The second reflective window 4 and the incident window 5 may be cut into continuous arc surfaces (e.g., one of a spherical surface, an aspherical surface, or a free-form surface) rather than planes, and may be designed by the same function, for example, generated using Zernike polynomials. In some embodiments, the incident window 5 is identical to the first reflective window 2 and has the same outer contour, and may be designed by the same function, for example, both are free-form surfaces; in other embodiments, the exit window 3, the first reflective window 2, the second reflective window 4, and the incident window 5 are all the same continuous surface, for example, designed by the same function.

[0141] Provide a reflective layer on the first reflective window 2 and the second reflective window 4;

[0142] The metal or metal alloy reflective layer can be formed by mask coating, sputtering coating or ion plating.

[0143] The micro display 6 is mounted on the incident window 5. The micro display 6 is used to emit light, which is incident on the first reflective window 2 from the incident window 5, reflected by the first reflective window 2 to the second reflective window 4, and then emitted through the exit window 3 to form a projected image.

[0144] The substrate 1100 is cut along the edge of the exit window 3 and / or the second reflective window 4 to form an annular sidewall 1 , and the size of the cut exit window 3 is the same as that of the second reflective window 4 ;

[0145] The cut annular side wall 1 is encapsulated to expose the exit window 3 .

[0146] It can be understood that the above steps are not strictly performed in the above order. The assembly of the micro display 6 can be performed after packaging or after cutting. The cutting process of the second surface 1300 of the substrate 1100 can also be performed before the cutting process of the first surface 1200 of the substrate 1100.

[0147] In some embodiments, cutting the first surface 1200 of the substrate 1100 to form the first structured surface 1220 further includes:

[0148] Providing a positioning member 1010 to fix the second surface 1300;

[0149] The center of the first surface 1200 is cut to form an exit window 3 lower than the first surface 1200, and the center of the exit window 3 is cut to form a first reflection window 2 lower than the exit window 3. The first reflection window 2 includes one of a spherical surface, an aspherical surface or a free-form surface.

[0150] It can be understood that, since the first surface 1200 of the substrate 1100 to be processed is cut to form a first structural surface 1220 including the exit window 3 and the first reflection window 2, the exit window 3 and the first reflection window 2 can both be recessed relative to the first surface 1200. At this time, when the relative second surface 1300 is cut, the positioning or fixing part (such as a clamp) will not contaminate or damage the exit window 3 and the first reflection window 2 when clamping the first surface 1200 (as shown in FIG26 ); on the other hand, if the recessed exit window 3 is cut first and then the first reflection window 2 is further recessed and cut out, it can make the center positioning processing of the first reflection window 2 more convenient, improve the accuracy of the cutting alignment of the first reflection window 2, and reduce deviations such as inaccurate positioning caused by cutting.

[0151] In some embodiments, performing a cutting process on the second surface 1300 of the substrate 1100 to form the second structured surface 1310 includes:

[0152] A positioning member 1010 is provided to fix the first surface 1200, and a gap is formed between the surface of the positioning member 1010 and the first reflective window 2; that is, the positioning member 1010 does not directly contact the first reflective window 2. It is ensured that the positioning member 1010 does not contaminate or damage the exit window and the first reflective mirror when contacting the surface.

[0153] The periphery of the second surface 1300 is cut to form an incident window 1312, a second reflective window 4 and at least a portion of the side wall 1, wherein at least a portion of the side wall 1 is perpendicular to the second surface 1300, the incident window 1312 is parallel to the exit window 3, the second reflective window 4 is lower than the incident window 5, and the second reflective window 4 includes one of an inclined surface, a spherical surface, an aspherical surface or a free-form surface.

[0154] It can be understood that the position of the second surface 1300 when cutting is exactly complementary to the position of the first surface 1200 when cutting the periphery of the second surface 1300 to retain the central area is finally formed into a relatively convex setting (for example, a convex cylindrical or prism-shaped, etc.), specifically including the side wall 1, the incident window 5 and the second reflective window 4, wherein the incident window 5 is formed parallel to the exit window 1212, and the second reflective window 4 is arranged around the incident window 5; the maximum lateral dimension of the incident window 5 is smaller than the maximum dimension enclosed by the side wall 1, and the incident window 5 and The side walls 1 are spaced apart, and the second reflective window 4 is formed between the side walls 1 and the incident window 5. Taking FIG26 as an example, the second reflective window 4 can be arranged at an inclined surface relative to the incident window 5. In this case, the outer contours of the incident window 5 and the second reflective window 4 can be an inverted trapezoid. Of course, the second reflective window 4 can also be designed as an arc or curved surface, and its curved surface faces the same direction as the first reflective window 2. Of course, the curvatures of the two can be different, as long as it can satisfy the requirement of further reflecting the light reflected from the first reflective window 2 (the reflective window with a metal reflective layer) to the exit window 3. The side wall 1 can be perpendicular to the exit window 3. In addition, when cutting, the maximum transverse dimension D1 of the cut exit window 3 needs to be greater than or equal to the maximum transverse dimension D2 of the side wall 1 to ensure that the mathematical parameters between the incident window 5, the second reflective window 4 and the exit window 3 can be matched in the subsequent cutting steps, thereby reducing the related production processes. During the cutting process, for example, a cylinder or a polyhedral prism can be cut first, and then the excess part is cut off to form a protruding column according to the size of the incident window 5 and the inclination or curvature of the second reflective window 4. After cutting, the second surface 1300 may be completely removed or only the outer part may be retained (such as the position part that is convenient for clamping by the clamp).

[0155] In some embodiments, the projected image of the microdisplay 6 covers a wearer's field of view of at least 8°; the projected image has a magnification factor of no less than 2.5; the microdisplay has a resolution per pixel of no less than 2 arc minutes of the wearer's field of view; and the pixel-to-pixel pitch of the microdisplay does not exceed 4 microns. A description of these parameters can be found in the corresponding device embodiments and is not further elaborated here.

[0156] In some embodiments, providing a reflective layer on the first reflective window 2 and the second reflective window 4 further includes:

[0157] A first baffle 1510 is provided. The first baffle 1510 includes first blocking areas 1512 and 1514 and a first hollow area 1516. The first blocking areas 1512 and 1514 do not allow metal particles to pass through, while the first hollow area 1516 allows metal particles to pass through.

[0158] The first shielding area shields the incident window 5, the first hollow area corresponds to the second reflective window 4, and a metal reflective layer is evaporated on the second reflective window 4 corresponding to the first hollow area;

[0159] A second baffle 1520 is provided. The structure of the first baffle 1510 is different from that of the second baffle 1520. The second baffle 1520 includes a second blocking area 1524 and a second hollow area 1522. The second blocking area 1524 does not allow metal particles to pass through, and the second hollow area 1522 allows metal particles to pass through. Since the incident window 5 and the first reflective window 2 are aligned, and the exit window 3 and the second reflective window 4 are aligned, different first baffles 1510 and second baffles 1520 can be used.

[0160] The second shielding area shields the exit window 3 , the second hollow area corresponds to the first reflective window 2 , and a metal reflective layer is evaporated on the first reflective window 2 corresponding to the second hollow area.

[0161] In some embodiments, installing the microdisplay 6 on the incident window 5 further includes coating an adhesive on the surface of the microdisplay 6 and / or the incident window 5 , and bonding the microdisplay 6 and the incident window 5 using a positioning member.

[0162] In some embodiments, cutting the substrate 1100 along the edge of the exit window 3 and / or the second reflective window 4 further includes: using laser cutting to produce a cylindrical substrate 1100 with complete sidewalls 1 in the vertical direction along the edge of the exit window 3 and / or the second reflective window 4.

[0163] In some embodiments, encapsulating the cut substrate 1100 to expose the exit window 3 further includes encapsulating the circumference of the sidewall 1 and the circumference of the microdisplay 6 with a light-proof encapsulation layer 71 to expose the exit window 3, and fixing the second reflective window 4, the microdisplay 6, and the backplane 61 with the encapsulation layer 71. Optionally, the light-proof encapsulation layer 71 includes black epoxy resin, black silicone rubber, or includes a cylindrical light-proof sealing sleeve.

[0164] In some embodiments, the manufacturing method further includes: providing a light-transmitting protective layer 8; covering the light-transmitting protective layer 8 on the exit window 3, the first reflective window 2 and / or the encapsulation layer 71, and the size of the light-transmitting protective layer 8 is equal to the size of the exit window 3.

[0165] As shown in FIG28 , the second reflective window 4 is coated to form a second reflective layer 13121. Specifically, the substrate 1100, having been cut to form the first reflective window 2 and the second reflective window 4, can be placed in a coating positioning member or fixture. FIG27 illustrates the example of coating the second reflective window 4 on the second structural surface 1310 first. Since the substrate 1100 having the sidewall 1, the incident window 5, and the second reflective window 4 has already been cut in the previous step, coating can be performed directly at this point, thereby reducing the need for fixture replacement and manufacturing steps. Alternatively, the first reflective window 2 on the first structural surface 1220 can be coated first. The order of coating can be adjusted based on the actual production line. During the specific coating step, after the substrate 1100 is positioned and fixed, a first baffle 1510 is placed at a position corresponding to the second structured surface 1310. Specifically, a positioning member (e.g., a clamp) can be used to secure the baffle 1510. The baffle 1510 can be a mask, such as a metal mask, or other materials. It is understood that the baffle 1510 has a blocking area and a hollow area (not shown). The blocking area covers the second structured surface 1310 except for the second reflective window 4, thereby shielding the incident window 5 and the sidewall 1. The hollow area corresponds to the second reflective window 4 and allows metal particles to pass through. A layer of metal can be deposited on the second reflective window to form the second reflective layer 13121, such as aluminum, silver, or a mixture of aluminum and silver. Other methods, such as sputtering or ion plating, are also feasible, and both methods should avoid coating the incident window 5 and the sidewall 1.

[0166] As shown in Figure 29, the first reflective window 2 is coated to form a first reflective layer 12121. The specific coating method can be the same as the above steps, but it is still necessary to ensure that only the first reflective window 2 is coated, and the exit window 3 is not coated (for example, the metal mask is also used for corresponding shielding); that is, the blocking area 1524 of the second baffle 1520 blocks the exit window 3, and the hollow area 1522 of the second baffle 1520 corresponds to the first reflective window 2, allowing metal particles and the like to pass through to form a metal reflective layer.

[0167] In some embodiments, the position of the first baffle 1510 can be as close to the non-coated surface as possible. When the second reflective window 4 is coated, as shown in Figure 28, since the side wall 1, the incident window 5 and the second reflective window 4 are not in the same plane, the blocking area 1512 of the baffle 1510 that blocks the incident window 5 and the blocking area 1514 of the baffle 1510 that blocks the side wall 1 are also not in the same plane, that is, the blocking areas of the baffles 1510 in each area need to be close to their corresponding shielding areas, which can reduce the oblique entry of the metal layer into the non-coated surface (side wall 1 and incident window 5) during coating; of course, if the coating process is controlled more accurately, a baffle (metal mask, etc.) 15 with the same plane can also be used for blocking. When coating the first reflective window 2, vertical and horizontal baffles 1512 and 1514 may be included. The vertical and horizontal baffles 1510 are shielding areas, and the two parallel vertical shielding areas 1512 are formed into hollow areas, the size of which may be exactly the same as the maximum horizontal dimension of the second reflective window 1212, thereby allowing only the first reflective window 2 to be coated.

[0168] As shown in FIG30 , the microdisplay 6 is mounted on the incident window 5 of the second structural surface 1310 to secure the microdisplay 6 to the substrate 1100. It is understood that adhesive can be applied to the microdisplay 6 in advance, and then the positioning member 1010 can be used to clamp and bond the microdisplay 6 to the incident window 5. Alternatively, adhesive can be applied to the incident window 5 first, and then the microdisplay 6 can be clamped and bonded to the incident window 5. Alternatively, other methods of fixed connection can be used, such as mechanical connection, welding, etc. The microdisplay 6 can be the same size as the incident window 5; of course, the incident window 5 can also be appropriately larger than the microdisplay 6, as long as all light from the microdisplay 6 can enter through the incident window 5.

[0169] Continuing with reference to FIG31 , the substrate 1100 to be processed is mounted on a fixture or positioning member 1010 and is cut along the edge of the exit window 3 of the first structural surface 1220. The cutting position corresponding to the exit window 3 can be determined based on the maximum transverse dimension D2 of the side wall 1 of the second structural surface 1310 (in conjunction with FIG27 ), for example, to ensure that the side wall 1 is not excessively cut or damaged. The cutting method can be mechanical or laser cutting, etc. After cutting, a main body with a reflective layer and a microdisplay 6 that has not yet been encapsulated can be obtained.

[0170] As shown in FIG32 , the optical body is encapsulated to expose the first structural surface 1220. It can be understood that the side wall of the base 1100 and the second reflective window 41 are both encapsulated. A black or opaque sealing sleeve 71 can be used for encapsulation while keeping the exit window 3 of the first structural surface 1220 exposed. Of course, injection molding and other processes can also be used to place the above-mentioned base 1100 in a mold and inject black or opaque glue to achieve encapsulation while keeping the first structural surface 1220 exposed.

[0171] Optionally, as shown in Figure 32 , to further protect the exit window 3, an optical protective layer 8 can be added to the first structural surface 1220. The resulting packaged product is shown in Figure 33 , which is the near-eye display module 100 of the aforementioned embodiment. The cutting process in the aforementioned steps can include one or more of turning, drilling, boring, milling, planing, broaching, grinding, honing, superfinishing, and polishing. The black filler or sealing layer used for encapsulation can be black epoxy resin or black silicone rubber. It is understood that the thickness of the black filler or sealing layer can be as small as possible and prevent light from escaping. In some embodiments, the black filler or sealing layer can be formed using methods such as coating with an opaque film. In other embodiments, if other devices to be assembled with the display device have opaque or sealing layers, the device can be directly assembled with the other devices without encapsulation. The cutting process for cutting out the sidewall 1 can be laser cutting or mechanical cutting, among other methods.

[0172] The present application provides a near-eye display module, wherein: a first reflective window is provided with a first reflective layer and is configured to allow reflection of light;

[0173] A second reflective window, located at an end opposite the first reflective window, is provided with a second reflective layer and is configured to receive light reflected from the first reflective window and further reflect it; an incident window, surrounded by the second reflective window and coaxially disposed with the first reflective window; an exit window, disposed around the first reflective window, having the same dimensions as the second reflective window; an annular sidewall, connected at one end to the second reflective window and at the other end to the exit window; and a microdisplay, located at the incident window, wherein light emitted by the microdisplay is incident on the first reflective window through the incident window, is reflected by the first reflective window to the second reflective window, and then is emitted through the exit window to form a projected image. The projected image of the microdisplay covers a wearer's field of view of at least 8°. The magnification of the projected image is not less than 2.5. The microdisplay has a resolution per pixel of not less than 2 arc minutes of the wearer's field of view. The pixel-to-pixel pitch of the microdisplay does not exceed 5 microns. The first and second reflective windows comprise any one of an inclined surface, a spherical surface, an aspherical surface, or a free-form surface; the first and second reflective layers comprise a metal or metal alloy reflective material; the first and second reflective windows, the incident window, the exit window, and the area enclosed by the annular sidewall are a solid light-transmitting medium; the first reflective layer is located on a side of the first reflective window facing away from the solid light-transmitting medium; and the second reflective layer is located on a side of the second reflective window facing away from the solid light-transmitting medium; the solid light-transmitting medium comprises any one of polymethyl methacrylate, polycarbonate, plastic, and resin.

[0174] Wherein, the first reflective window, the exit window, the second reflective window and the annular sidewall are solid, the area enclosed by the first reflective window, the second reflective window, the incident window, the exit window and the annular sidewall is a hollow area, the first reflective layer is located on the side of the first reflective window facing the hollow area, the second reflective layer is located on the side of the second reflective window facing or away from the hollow area, the first reflective window, the second reflective window, the incident window, the exit window and the annular sidewall are solid, and include any one of polymethyl methacrylate, polycarbonate, plastic and resin. Wherein, the near-eye display module also includes an intermediate layer, the intermediate layer is arranged between the incident window and the microdisplay, and the thickness of the intermediate layer is less than the distance from the incident window to the first reflective window. Wherein, the microdisplay also includes a backplane, the backplane is located on the side of the microdisplay away from the incident window, and is electrically connected to the microdisplay, and the backplane is used to connect a driving power supply. Wherein, the near-eye display module further includes an encapsulation layer, the encapsulation layer includes an opaque material, the encapsulation layer wraps the annular sidewall, the encapsulation layer also fills the gap between the second reflective window, the microdisplay and\or the backplate, and allows at least part of the exit window and the backplate to leak out relative to the encapsulation layer, and the encapsulation layer is configured to fix the second reflective window, the microdisplay and the backplate. Wherein, in the direction from the microdisplay to the exit window, the outer contour dimensions of the encapsulation layer are the same, and in the direction perpendicular to the sidewall, the thickness of the encapsulation layer on the annular sidewall is less than the thickness of the encapsulation layer on the microdisplay. Wherein, the near-eye display module further includes an encapsulation layer, the encapsulation layer includes an opaque sleeve, the annular sidewall, the second reflective window, the microdisplay and the backplate are located in the sleeve, and the leads of the backplate and the exit window are exposed relative to the sleeve.

[0175] The device further includes a light-transmitting protective layer, which is provided over the first reflective window, the exit window, and / or the encapsulation layer. The size of the light-transmitting protective layer is equal to the size of the exit window. The overall size of the first reflective window, the second reflective window, the incident window, the exit window, the annular sidewall, the microdisplay, and the light-transmitting protective layer is between 0.5 cubic millimeters and 5 cubic centimeters.

[0176] The present application provides a method for manufacturing a near-eye display module, wherein a mirror body to be processed is provided, comprising a first surface and a second surface;

[0177] The first surface of the mirror body is cut to form a first structural surface, wherein the first structural surface includes an exit window and a first reflection window, and the exit window surrounds the first reflection window; the second surface of the mirror body is cut to form a second structural surface; wherein the second structural surface includes an incident window and a second reflection window, the second reflection window surrounds the incident window, and the incident window is coaxially arranged with the first reflection window; a reflective layer is provided for the first reflection window and the second reflection window; a micro display is installed on the incident window, and the light emitted by the micro display is incident from the incident window to the first reflection window, reflected from the first reflection window to the second reflection window, and then emitted through the exit window to form a projected image; the mirror body is cut along the edge of the exit window and / or the second reflection window to form an annular side wall, and the size of the cut exit window is the same as the size of the second reflection window; the cut annular side wall is encapsulated to expose the exit window. Among them, the cutting process of the first surface of the mirror body to form the first structural surface also includes: providing a positioning piece to fix the second surface; cutting the center of the first surface to form the exit window lower than the first surface, and cutting the center of the exit window to form a first reflection window lower than the exit window, and the first reflection window includes any one of a spherical surface, an aspherical surface or a free-form surface.

[0178] The cutting process of the second surface of the lens body to form the second structural surface includes: providing a positioning member to fix the first surface, with a gap between the surface of the positioning member and the first reflective window; cutting the periphery of the second surface to form an incident window, a second reflective window, and at least a portion of the sidewall, wherein at least a portion of the sidewall is perpendicular to the second surface, the incident window is parallel to the exit window, the second reflective window is lower than the incident window, and the second reflective window includes one of an inclined surface, a spherical surface, an aspherical surface, or a free-form surface. The projected image of the microdisplay covers a wearer's field of view of at least 8°; the magnification of the projected image is not less than 2.5; the microdisplay has a resolution of not less than 2 arc minutes per pixel of the wearer's field of view; and the pixel-to-pixel pitch of the microdisplay does not exceed 4 microns.

[0179] Among them, the setting of the reflective layer for the first reflective window and the second reflective window also includes: providing a first baffle, the first baffle includes a first blocking area and a first hollow area, the first blocking area does not allow metal particles to pass through, and the first hollow area allows metal particles to pass through; the first blocking area blocks the incident window, the first hollow area corresponds to the second reflective window, and a metal reflective layer is evaporated on the second reflective window corresponding to the first hollow area; providing a second baffle, the structure of the first baffle is different from that of the second baffle, the first baffle includes a second blocking area and a second hollow area, the second blocking area does not allow metal particles to pass through, and the second hollow area allows metal particles to pass through; the second blocking area blocks the exit window, the second hollow area corresponds to the first reflective window, and a metal reflective layer is evaporated on the first reflective window corresponding to the second hollow area.

[0180] Wherein, the step of installing the microdisplay on the incident window further includes coating an adhesive on the surface of the microdisplay and / or the incident window, and bonding the microdisplay and the incident window using a positioning member.

[0181] The step of cutting the mirror body along the edge of the exit window and / or the second reflective window further comprises: using laser cutting to vertically cut a cylindrical mirror body with complete sidewalls along the edge of the exit window and / or the second reflective window. The step of packaging the cut mirror body to expose the exit window further comprises: using a light-proof packaging layer to circumferentially package the sidewalls and the microdisplay to expose the exit window, and using the packaging layer to secure the second reflective window, the microdisplay, and the backplane.

[0182] The method further includes: providing a light-transmitting protective layer; and covering the light-transmitting protective layer on the exit window, the first reflective window, and / or the encapsulation layer, wherein the size of the light-transmitting protective layer is equal to the size of the exit window. The mirror body comprises any one of polymethyl methacrylate, polycarbonate, plastic, and resin, and the light-impermeable encapsulation layer comprises black epoxy resin, black silicone rubber, or comprises a cylindrical light-impermeable sealing sleeve.

[0183] The manufacturing method of the near-eye display module of the embodiment of the present application can package and manufacture the optical module and the microdisplay, with a streamlined process flow and low cost. It can also reduce the risk of damage to the optical components during the manufacturing process, and ultimately produce a near-eye display module with a small size and high optical utilization rate, which has good application prospects.

[0184] 34-47 , the present application further provides a method for manufacturing a near-eye display module, which is used to manufacture the near-eye display module 10 described in the above embodiment, and includes:

[0185] S10, providing a first mold 20;

[0186] S20, providing a second mold 30, wherein the first mold 20 and the second mold 30 include a first surface 22, a convex surface 21, a second surface 31 and an annular surface 32;

[0187] In some embodiments, the first mold 20 may be provided with the first surface 22, the raised surface 21, the second surface 31 and the annular surface 32 at the same time, while the second mold 30 may not be provided with them; in other embodiments, the first mold 20 may be provided with a part of the first surface 22, the raised surface 21, the second surface 31 and the annular surface 32, while the second mold 30 may be provided with another part of the first surface 22, the raised surface 21, the second surface 31 and the annular surface 32.

[0188] The first mold 20 may include a first surface 22 and a convex surface 21. The first surface 22 and the convex surface 21 may each include multiple surfaces. The convex surfaces 21 and the first surface 22 may be arranged alternately, with the convex surface 21 located at the center of the first surface. Alternatively, there may be multiple first surfaces 22 between two convex surfaces 21. In other embodiments, the first surface 22 may be planar, and the convex surface 21 may be spherical, aspherical, or a free-form surface. The first surface 22 and the convex surface 21 may each be a different surface. In other embodiments, the first surface 22 may be spherical, aspherical, or a free-form surface, and the convex surface 21 may be spherical, aspherical, or a free-form surface. The first surface 22 and the convex surface 21 may together form a continuous surface. The first surface 22 and the convex surface 21 may be designed using the same function, such as a Zernike polynomial.

[0189] The second surface 31 and the annular surface 32 may each include a plurality of surfaces. The annular surface 32 surrounds the second surface 31 and may not be coplanar with the second surface 31. The first mold 20 and / or the second mold 30 are further provided with a first sidewall 33 to form a receiving cavity 40 on the first mold 20 and / or the second mold 30. In some embodiments, the second surface 31 may be a plane, and the annular surface 32 may be a plane, a spherical surface, an aspherical surface, or a free-form surface, etc., and the second surface 31 and the annular surface 32 are two different surfaces. In other embodiments, the second surface 31 may be a spherical surface, an aspherical surface, or a free-form surface, etc., and the annular surface 32 may be a spherical surface, an aspherical surface, or a free-form surface, etc., and the second surface 31 and the annular surface 32 may together constitute a continuous surface. In optical design, the second surface 31 and the annular surface 32 may be designed by the same function, for example, generated by Zernike polynomials.

[0190] In other embodiments, the first surface 22 and the second surface 31 can be the same surface, for example, both are planes, or both are spherical, aspherical, or free-form surfaces. The first surface 22 and the second surface 31 can have the same contour shape, for example, a polygon, a circle, or an ellipse, etc. The first surface 22 and the second surface 31 can be designed using the same function, for example, generated using Zernike polynomials. In other embodiments, the first surface 22, the raised surface 21, the second surface 31, and the annular surface 32 can be designed using the same function, for example, generated using Zernike polynomials.

[0191] The second surface 31 can be at the center of the annular surface 32, and there can be a gap between the two adjacent annular surfaces 32 to facilitate subsequent cutting after die molding. It can be understood that the first side wall 33 can be arranged around the first mold 20 to form a receiving cavity 40. Optionally, the first side wall 33 can be arranged around the second mold 30 to form a receiving cavity 40. In some embodiments, the first side wall 33 can be arranged around the first mold 20 and the second mold 30 at the same time to form a small receiving cavity 40 on each mold. Multiple small receiving cavities 40 can be combined to form a large complete receiving cavity 40. The first side wall 33 can be perpendicular to the first surface 22 and the second surface 31. In some embodiments, the receiving cavity 40 can be a whole large one, and the above-mentioned related surfaces are set in the interior of the corresponding receiving cavity 40 or in the area of ​​the vertical projection of the corresponding receiving cavity 40. Optionally, the formed receiving cavity 40 can be a plurality of small receiving cavities 40 arranged in an array.

[0192] S30, injecting molten light-transmitting material between the first mold 20 and the second mold 30;

[0193] It can be understood that there may be a gap between the first mold 20 and the second mold 30, or one or both of the first mold 20 and the second mold 30 may be provided with an injection hole, and the molten light-transmitting material may be injected through the gap or the injection hole, wherein the molten light-transmitting material may be a transparent molten material, for example, any one of polymethyl methacrylate, polycarbonate, plastic, resin or glass.

[0194] In some embodiments, before injecting the molten light-transmitting material between the first mold 20 and the second mold 30 , the process may further include: aligning the first mold 20 and the second mold 30 so that the convex surface 21 and the second surface 31 are coaxially aligned and the first surface 22 and the second surface 31 are parallel;

[0195] A fixture 1011 or a positioning jig 1010 can be used to align the first mold 20 and the second mold 30 to ensure that the raised surface 21 and the second surface 31 are coaxially aligned. The first surface 22 and the second surface 31 can both be flat surfaces, and after the molds are aligned, the two are parallel to each other, and the lateral dimension of the second surface 31 can be greater than or equal to the lateral dimension of the raised surface 21.

[0196] S40, pressing the first mold 20 and the second mold 30 together so that the molten light-transmitting material is fully attached to the first surface 22 and the convex surface 21, the second surface 31 and the annular surface 32;

[0197] The first mold 20 and the second mold 30 can be clamped using a fixture or the like. One of the molds can be positioned and fixed, and the other mold can be pressed together in a fixed orientation. For example, the mold having the accommodating cavity 40 can be fixed, and the other mold can be pressed together using a pressure mechanism or the like. In some embodiments, the two molds can also be simultaneously controlled to move toward each other for pressing. Pressing together allows the molten material to fully adhere to the first surface 22 and the raised surface 21, and the second surface 31 and the annular surface 32, while allowing excess molten material to escape during this process.

[0198] In some embodiments, the process of laminating is also included in the step of controlling the distance between the first surface 22 and the second surface 31. If the distance reaches the preset distance, lamination is stopped. If the distance is not reached, the distance is controlled to reach the preset distance. The distance formed by lamination is controlled so that the pressed body 50 meets the required design size. Optionally, if there are multiple arrays of accommodating cavities 40, the final result is multiple arrays of main bodies 50. Therefore, in order to facilitate subsequent batch operations, such as batch transportation, clamping, etc., it is necessary to ensure that there is a connecting structure between the two adjacent main bodies, that is, the lamination process also needs to control the thickness of the connecting structure. If it is too thin, the overall structural strength is insufficient, and if it is too thick, it is not conducive to subsequent cutting. In some embodiments, the lamination process also includes controlling the gap height between the two adjacent accommodating cavities 40, that is, the connection structure of the two adjacent main bodies 50 finally formed. The gap height can be 100 microns, 300 microns, 400 microns or 500 microns, etc.

[0199] S50, demolding the first mold 20 and the second mold 30 to obtain a base or body 50 formed after the light-transmitting material is cured, wherein the base includes: a concave wall having a shape complementary to the convex surface, a first wall surrounding the concave wall, an annular wall complementary to the annular surface, and a second wall surrounded by the annular wall;

[0200] It is understood that in the embodiments of the present application, the description of the optical module is described as a body in some embodiments and as a substrate in other embodiments. The substrate 50 and the body can be understood as the same or similar. The substrate includes a recessed wall 51 having a shape complementary to the raised surface 21, a first wall 52 surrounding the recessed wall 51, and the substrate 50 also includes an annular wall 54 complementary to the annular surface 32, and a second wall 53 surrounded by the annular wall 54. In terms of position, the first end of the substrate or body 50 includes the first wall 52 and the recessed wall 51 lower than the first wall 52. The second end of the body 50, opposite the first end, includes a second wall 53 and an annular wall 54. The second wall 53 is parallel to the first wall 52, and the annular wall 54 surrounds the second wall 53. The body 50 also includes a second side wall 55 connecting the first wall 52 and the annular wall 54. The outer contour of the annular wall 54 can be polygonal, circular, elliptical, or a closed contour composed of a combination of straight and curved edges. The first wall 52 and the second wall 53 formed can be planes, respectively, and the recessed wall 51 and the annular wall 54 can be spherical, aspherical or free-form surfaces, respectively. In some embodiments, the first wall 52 and the recessed wall 51 are two different surfaces, respectively, and the second wall 53 and the annular wall 54 are two different surfaces, respectively; in other embodiments, the first wall 52 and the recessed wall 51 are the same surface, and the second wall 53 and the annular wall 54 are the same surface, for example, they can all be planes, spherical, aspherical or free-form surfaces, etc.; in other embodiments, the first wall 52, the recessed wall 51, the second wall 53 and the annular wall 54 are the same surface, and in optical design they can be designed by the same function, for example, generated by Zernike polynomials.

[0201] In other embodiments, the recessed wall 51 and the second wall 53 may be the same surface, such as both being planes, or both being spherical, aspherical, or free-form surfaces. The recessed wall 51 and the second wall 53 may be designed using the same function, such as generated using Zernike polynomials. The recessed wall 51 and the second wall 53 may have the same contour shape, such as a polygon, a circle, or an ellipse.

[0202] After the molten light-transmitting material has sufficiently cooled, it can be separated from the mold using a clamp 1011 or the like. The resulting main body 50 can be formed in multiple separate pieces or in an array of connected pieces. The main body 50 can be shaped like a column or a trapezoid, etc. The main body 50 and the base 103 of the optical module 10 of the aforementioned embodiment can have the same or similar functions.

[0203] S60, coating the recessed wall and the ring wall with a reflective layer to form a first reflective window and a second reflective window respectively, while the first wall and the second wall are not coated with a reflective layer to form an exit window and an incident window respectively;

[0204] In some embodiments, referring to Figures 43-44, after obtaining the main body 50 formed by curing the light-transmitting material, the method further includes coating the recessed wall 51 with a reflective layer 541 to form the first reflective window 2 described in the above optical module embodiment, and coating the annular wall 54 with a reflective layer 541 to form the second reflective window 4 described in the above optical module embodiment. Physical vapor deposition or chemical vapor deposition, such as mask coating, sputtering coating, or ion plating, can be used to form the metal or metal alloy reflective layer 541 on the recessed wall 51 and the annular wall 54. The first wall 52 and the second wall 53 are not coated with the reflective layer to form the exit window 3 and the incident window 5, respectively, thereby forming the optical module 10 described in the above embodiment.

[0205] In some embodiments, before demolding the first mold 20 and the second mold 30, it is also included to determine whether the temperature of the injected molten light-transmitting material has dropped below the corresponding solidification point. If so, demolding can be performed. Otherwise, cooling needs to be continued, for example, by using air cooling, water cooling or natural heat dissipation.

[0206] The present application provides a method for manufacturing a near-eye display module, wherein each mold is provided with a corresponding raised surface 21 and first surface 22, second surface 31 and annular surface 32, and then the two molds are aligned to ensure that the raised surface 21 and the second surface 31 are coaxially arranged in the accommodating cavity 40, and the first surface 22 and the second surface 31 are parallel, and molten light-transmitting material is injected and then the mold is pressed together to finally make the molten material fully adhere to the raised surface 21 and the second surface 31 / the first surface 22 and the second surface 31, and after curing, the mold is demolded to form the main body 50 of the required design. The above method does not require cutting of each surface of the raw material to form the required design surface, reduces material loss, and has low cost. In addition, no cutting or other processing is required, and it is not easy to cause optical impact on the main body 50.

[0207] It can be understood that the dimensional relationship of the various components in the drawings of the various embodiments of the present application is not strictly as shown in the figures. The figures are reference examples to reflect the positional relationship of the various components. For dimensions or other related relationships, please refer to the relevant text description of this application.

[0208] In some embodiments, referring to Figures 35-37, the provided first mold 20 may include a plurality of first surfaces 22 arranged in an array and a plurality of raised surfaces 21 arranged in an array, and the provided second mold 30 includes a plurality of second surfaces 31 arranged in an array and a plurality of annular surfaces 32 arranged in an array. It can be understood that the size of each raised surface 21 is the same, the size of each first surface 22 is the same, the size of each second surface 31 is the same, and the size of each annular surface 32 is the same. In other embodiments, the size of each raised surface 21, first surface 22, second surface 31, and annular surface 32 may also be different, for example, the size of the raised surface 21, first surface 22, second surface 31, and annular surface 32 gradually increases or decreases along the first direction. It is understood that the convex surface 21 and the annular surface 32 include any one or a combination of inclined surfaces, spherical surfaces, aspherical surfaces, or free-form surfaces. The convex surface 21 and the annular surface 32 can have the same surface shape or profile. The shape of the concave wall 51 is complementary to that of the convex surface 21, and the shape of the annular wall 54 is complementary to that of the annular surface 32. It is understood that complementary means opposite or identical matching shapes. For example, if one is a convex surface, the other is a concave surface. If one surface is flat, the other is also flat. The shape of the first surface 22 is the same as that of the first wall 52, and the shape of the second surface 31 is the same as that of the second wall 53. The outer contours of the annular surface 32 and the first surface 22 can be the same, and the outer contours of the convex surface 21 and the second surface 31 can be the same, for example, both are polygonal, circular, elliptical, or closed contours composed of a combination of straight and arcuate edges. For the types and shapes of the various surfaces, please refer to the relevant description of the above embodiment and will not be repeated here.

[0209] In some embodiments, the size of the accommodating cavity 40 can be between 0.4 cubic millimeters and 4 cubic centimeters, such as 0.4 cubic millimeters, 1 cubic millimeter, 8 cubic millimeters, 1 cubic centimeter, 2 cubic centimeters, 4 cubic centimeters, etc. The space is so small that the size of the single main body 50 finally formed appears relatively small to the naked eye, and it is relatively easy to integrate into various other devices without affecting the appearance or large-area structure of the original device, such as glasses or other head-mounted devices, etc., and has a good adaptation space.

[0210] In some embodiments, referring to Figures 35-37, the first mold 20 and / or the second mold 30 are further provided with a third sidewall 34, which is parallel to the first sidewall 33 and divides the accommodating cavity 40 into an array of accommodating cavities 40. The plurality of third sidewalls 34 can be part of the first mold 20 or part of the second mold 30, or can be independent components provided on the first mold 20 or the second mold 30, wherein the height of the third sidewall 34 is the same as the height of the first sidewall 33. The third sidewall 34 can be provided in the first mold 20 and / or the second mold 30 and located between the first sidewalls 33. The plurality of third sidewalls 34 are spaced apart to separate the accommodating cavities 40. For example, a first sidewall 33 and a third sidewall 34 can be provided simultaneously in two molds to form a receiving cavity 40 on both molds. This can reduce the depth to which the molten material enters the receiving cavity 40 and adheres to the design surface. It can be understood that the third sidewall 34 can block the entry of the molten light-transmitting material, so that the solidified molten material has gaps 57 ( FIG. 40 ) between the receiving cavities 40 arranged in the array. When forming an optical module array such as that shown in FIG. 41 or FIG. 7 , this allows for quick identification of the cutting position, facilitating subsequent cutting of the optical module array. Furthermore, this gap 57 facilitates clamping or positioning by a fixture, etc.

[0211] In some embodiments, referring to Figures 40, 43-44, coating the recessed wall 51 and the annular wall 54 with a reflective layer includes: providing a first baffle 1530, the first baffle 1530 including a first sub-baffle 1532 and a second sub-baffle 1534, a gap being provided between the first sub-baffle 1532 and the second sub-baffle 1534, and the first sub-baffle 1532 and the second sub-baffle 1534 having different heights and sizes; it can be understood that the first sub-baffle 1532 and the second sub-baffle 1534 are not on the same straight line, but are close to the areas to be shielded respectively, thereby reducing the probability of the reflective material entering the side wall of the main body 50 when the reflective layer 541 is coated on the annular wall 54.

[0212] The first sub-baffle 1532 blocks the gap 57 between two adjacent main bodies 50, wherein the clamp 1011 can be clamped in the gap 57, thereby making the entire array more stable. The size of the second sub-baffle 1534 can be the same as the second wall 53, thereby blocking the second wall 53. The size of the horizontal gap between the first sub-baffle 1532 and the second sub-baffle 1534 corresponds to the width of the annular wall 54, that is, the distance of the gap is equal to the distance between two adjacent second walls 53, and a metal or metal alloy reflective layer 541 is evaporated from the gap to the annular wall 54.

[0213] A second baffle 1540 is provided. The structure of the first baffle 1530 is different from that of the second baffle 1540. The second baffle 1540 includes a third sub-baffle 1542 and a fourth sub-baffle 1544. There is a gap between the third sub-baffle 1542 and the fourth sub-baffle 1544. The third sub-baffle 1542 and the fourth sub-baffle 1544 have the same height.

[0214] The size of the third sub-baffle 1542 can be greater than or equal to the first wall 52, thereby blocking the first wall 52. The fourth sub-baffle 1544 spans two adjacent first walls 52. The gap between the third sub-baffle 1542 and the fourth sub-baffle 1544, or the gap between the fourth sub-baffle 1544 and the fourth sub-baffle 1544 corresponds to the width of the recessed wall 51, that is, the distance of the gap is equal to the width of the recessed wall 51, and a metal or metal alloy reflective layer 511, such as silver, aluminum, aluminum-magnesium alloy, etc., is evaporated from the gap to the recessed wall 51.

[0215] In some embodiments, referring to FIG. 45 , after coating the recessed wall 51 and the annular wall 54 with a reflective layer, the process further includes: attaching a microdisplay 6 to each second wall 53, with the microdisplay 6 and the second wall 53 in close contact, and the lateral dimension of the microdisplay 6 being less than or equal to the lateral dimension of the second wall 53. The microdisplay 6 can be any of those described in the above embodiments. The main body 50 can be secured using a fixture 1011, and optical glue 63 can be applied to the surface of the second wall 53 or the microdisplay 6. The fixture 1011 can then be used to clamp the microdisplay 6 and bond it to the second wall 53.

[0216] In other embodiments, the microdisplay 6 may also be installed before coating.

[0217] The microdisplay 6 also includes a backplate 61, which is located on the side of the microdisplay 6 facing away from the second wall 53 and is electrically connected to the microdisplay 6. The backplate 61 is used to connect to a driving power source. The backplate 61 can be a driving board such as a circuit board and can be rigid or flexible. The backplate 61 is used to connect to a driving power source to provide electrical drive for the microdisplay 6. The backplate 61 can be larger than or equal to the microdisplay 6. Alternatively, the backplate 61 can be a portion of the microdisplay 6.

[0218] In some embodiments, referring to FIG46 , after attaching the microdisplay 6 to each second wall 53, the process further includes cutting the connecting structure between two adjacent bodies 50 in a direction perpendicular to the first wall 52 to separate the bodies 50. A fixture 1011 can be used to secure the side on which the microdisplay 6 is attached, and the bodies 50 to be processed can be cut along the edge of the first wall 52 to ensure that the sidewalls 55 are not excessively cut or damaged. The cutting method can be mechanical or laser cutting.

[0219] In some embodiments, referring to FIG. 47 , after cutting the connecting structure between two adjacent main bodies 50 to separate them into independent main bodies 50, the process further includes encapsulating the individual main bodies 50 with an encapsulating material 71 to expose the first wall 52. The opaque encapsulating material may be a coating or material such as black epoxy resin, black silicone rubber, carbon black, nickel black, black chrome, or Vanta Black. It is understood that encapsulating both the sidewalls 55 and the annular wall 54 of the main body 50 can be performed using a black or opaque sealing sleeve 80 while maintaining the first wall 52 exposed. Alternatively, an injection molding process can be employed, wherein the main body 50 is placed in a mold and a black or opaque glue is injected to achieve encapsulation while maintaining the first wall 52 exposed. In some embodiments, at least a portion of the back panel 61 is exposed relative to the encapsulating material 80, thereby facilitating electrical connection with external electrical components (e.g., a battery or driver board).

[0220] In some embodiments, referring to Figures 38-40 , laminating the first mold 20 and the second mold 30 further includes determining whether a distance D2 between the first surface 22 and the second surface 31 during lamination meets a predetermined value. If so, lamination is discontinued; otherwise, lamination is performed to the predetermined distance. It will be appreciated that distance D2 facilitates the formation of a connecting structure 56 between adjacent bodies 50, and the thickness of distance D2 may be between 100 and 500 microns.

[0221] In some embodiments, referring to Figures 41-42 , a connecting layer 56 is provided along the entire circumference of each optical module 10 to further stabilize the entire array. In some embodiments, the connecting layers 56 are spaced apart along the circumference of each optical module 10 to reduce the amount of light-transmitting material injected and reduce costs. It is understood that the connecting layer 56 is formed by the distance D2 described in the above embodiment, and the thickness of the connecting layer 11 can be 100-500 microns. This ensures the overall structural strength of the optical module array and prevents subsequent mechanical cutting.

[0222] Optionally, referring to Figures 38-39, the position of the distance D2 is not flush with the second surface 31. It can be understood that since the annular surface 32 is on the outside of the second surface 31, it is not a regular vertical surface. In order to ensure that the annular surface 32 can still maintain any one or combination of the intended designed inclined surface, spherical surface, aspherical surface or free-form surface during the pressing process, that is, to reduce the deformation of the annular surface 32 during the formation of the annular wall 54 due to the overflow process being too close to the gap D2, it is necessary to ensure that the gap opening is as far away from the annular surface 32 as possible, that is, to ensure that the cross-section in the direction of the vertical gap line is not flush with the annular surface 32, for example, higher or lower than the position of the gap D1 or D2, which is conducive to maintaining the formation of the reference surface of the annular surface.

[0223] In some embodiments, the gap D2 may not exist, and the demolded main body 50 is a single independent body, rather than an array formed by the connecting structure 56. This facilitates the flexible selection of the single main body 10 in the subsequent process.

[0224] In some embodiments, referring to FIG. 47 , a light-transmitting layer 8 is provided. The size of the light-transmitting layer is equal to or greater than the size of the exit window 3 . The light-transmitting layer 8 is disposed over the first reflective window 2 and the exit window 3 . The light-transmitting layer 8 may be made of PMMA (polymethyl methacrylate), PC (polycarbonate), resin glass, or the like. The light-transmitting layer 8 may protect or safeguard the optical module 10 .

[0225] It is understood that the light-transmitting layer 8 is provided over the exit window 3 corresponding to the first wall 52 and the first reflective window 2 corresponding to the recessed wall 51, and the size of the light-transmitting layer 8 is greater than or equal to the size of the first wall 52. Optical glue can be used to bond the light-transmitting layer 8 to the first wall 52. The light-transmitting layer 8 does not change the original light propagation path, and can protect the first wall 52 and the recessed wall 51, reducing wear and tear on them, and also reducing the entry of dust and other debris that affects their optical efficiency. In some embodiments, the size of the light-transmitting layer 8 can be the same as the size of the opaque packaging material, so that the overall structure is more regular and facilitates subsequent assembly.

[0226] With reference to FIG47 , the present application also provides an embodiment of a near-eye display module, and the near-eye display module 100 is made by the manufacturing method of the above embodiment. The near-eye display module as a whole can be cylindrical or prismatic. The entire size can be between 0.5 cubic millimeters and 5 cubic centimeters, such as 0.5 cubic millimeters, 1 cubic millimeter, 8 cubic millimeters, 1 cubic centimeter, 2 cubic centimeters, 5 cubic centimeters, etc. Its size is relatively small to the naked eye, and it is relatively easy to integrate into various other devices without affecting the appearance or large-area structure of the original device. For example, the near-eye display module can be used in myopia glasses, hyperopia glasses, sunglasses, goggles, smart glasses or other head-mounted devices, etc., and has a good adaptation space.

[0227] A method for manufacturing a near-eye display module, wherein: a first mold is provided, the first mold includes a first surface and a convex surface, the convex surface is convex relative to the first surface; a second mold is provided, the second mold includes a second surface and an annular surface, the annular surface surrounds the second surface and is not coplanar with the second surface, wherein the provided first mold and / or second mold is also provided with a first side wall to form an accommodating cavity on the first mold and / or second mold, and the first side wall is perpendicular to the first surface and the second surface; the first mold and the second mold are aligned so that the convex surface and the second surface are coaxially aligned and the first surface and the second surface are parallel; molten light-transmitting material is injected between the first mold and the second mold; the first mold and the second mold are pressed so that the molten light-transmitting material is fully adhered to the first surface and the convex surface, the second surface and the annular surface; the first mold and the second mold are demolded to obtain a mirror body formed after the light-transmitting material is solidified, wherein the first end of the mirror body includes a wall complementary to the shape of the convex surface, and the second end of the mirror body includes a wall complementary to the annular surface.

[0228] The first mold provided includes a plurality of first surfaces arranged in an array and a plurality of convex surfaces arranged in an array, and the second mold provided includes a plurality of second surfaces arranged in an array and a plurality of annular surfaces arranged in an array, wherein the convex surfaces and the annular surfaces include any one or a combination of inclined surfaces, spherical surfaces, aspherical surfaces, or free-form surfaces, the first end of the mirror body includes a first wall and a recessed wall lower than the first wall, the second end of the mirror body opposite to the first end includes a second wall and an annular wall, the second wall is parallel to the first wall, and the annular wall surrounds the second wall, the mirror body also includes a second side wall connecting the first wall and the annular wall, the shape of the first surface is the same as the shape of the first wall, and the shape of the second surface is the same as the shape of the second wall. The first mold and / or the second mold provided are also provided with a third side wall, the third side wall is parallel to the first side wall, and the third side wall divides the accommodating cavity into accommodating cavities arranged in an array.

[0229] After obtaining the mirror body formed by curing the light-transmitting material, the process further includes coating the recessed wall and the annular wall with a reflective layer. After coating the recessed wall and the annular wall with the reflective layer, the process further includes mounting a microdisplay on each second wall, wherein the microdisplay and the second wall are tightly attached, and the lateral dimension of the microdisplay is less than or equal to the lateral dimension of the second wall. After mounting the microdisplay on each second wall, the process further includes cutting the connecting structure between two adjacent mirror bodies in a direction perpendicular to the first wall to separate the mirror bodies.

[0230] After cutting the connecting structure between two adjacent mirror bodies to separate them into independent mirror bodies, the method further includes: encapsulating the individual mirror bodies with an encapsulating material to expose the first wall, wherein the encapsulating material is opaque. Before demolding the first and second molds, the method further includes: determining whether the temperature of the light-transmitting material is below the freezing point; if so, demolding is performed; if not, controlling the temperature of the light-transmitting material to be below the freezing point. Laminating the first and second molds further includes: determining whether the distance between the first and second surfaces during lamination meets a preset value; if so, discontinuing lamination; otherwise, laminating to the preset distance. Among them, plating the reflective layer on the recessed wall and the ring wall includes: providing a first baffle, the first baffle includes a first sub-baffle and a second sub-baffle, there is a gap between the first sub-baffle and the second sub-baffle, and the first sub-baffle and the second sub-baffle have different heights and sizes; the first sub-baffle blocks the gap between two adjacent mirror bodies, the second sub-baffle blocks the second wall, the gap corresponds to the ring wall, the distance of the gap is equal to the distance between two adjacent second walls, and the metal or metal alloy reflective layer is evaporated from the gap to the ring wall; providing a second baffle, the structure of the first baffle is different from that of the second baffle, the first baffle includes a third sub-baffle and a fourth sub-baffle, there is a gap between the third sub-baffle and the fourth sub-baffle, and the third sub-baffle and the fourth sub-baffle have the same height; the third sub-baffle blocks the first wall, the fourth sub-baffle spans two adjacent first walls, the gap corresponds to the recessed wall, the distance of the gap is equal to the width of the recessed wall, and the metal or metal alloy reflective layer is evaporated from the gap to the recessed wall.

[0231] The method further includes: providing a light-transmitting protective layer; and covering the light-transmitting protective layer on the first wall and the recessed wall, wherein the size of the light-transmitting protective layer is greater than or equal to the size of the first wall. The method for manufacturing a near-eye display module according to the embodiment of the present application can encapsulate and manufacture an optical module and a microdisplay, streamlining the process flow, reducing the cutting of raw materials, lowering production costs, and reducing the risk of damage to optical components due to cutting. Ultimately, a near-eye display module with a small size and high optical utilization is produced, which has good application prospects.

[0232] The present application further provides a method for manufacturing a near-eye display module 100 ′, which is used to manufacture the near-eye display module 10 described in the above embodiment, and includes:

[0233] The method for preparing the near-eye display module 100' specifically includes the following steps:

[0234] Step S11: Provide an injection mold, the injection mold includes an injection cavity, the inner surface of the injection cavity includes at least a first injection molding surface, a second injection molding surface, a third injection molding surface and a fourth injection molding surface, the first injection molding surface and the second injection molding surface are arranged opposite to each other, the second injection molding surface and the fourth injection molding surface are located on the same side, and the third injection molding surface is located on the side of the first injection molding surface.

[0235] In some embodiments, referring to Figures 49-56 , the injection mold can be arranged in an m×n array, where m and n can be, but are not limited to, 1, 2, 3, 4, or other numbers. In some embodiments, taking m as 1 and n as 3 as an example, the injection mold can be arranged in a 1×3 array. Specifically, the injection mold 20 ′ includes an injection cavity, the inner surface of which includes at least a first injection molding surface 220 ′, a second injection molding surface 210 ′, a third injection molding surface 230 ′, and a fourth injection molding surface 211 ′. The first injection molding surface 220 ′ and the second injection molding surface 210 ′ are disposed opposite each other, the second injection molding surface 210 ′ and the fourth injection molding surface 211 ′ are located on the same side, and the third injection molding surface 230 ′ is located to the side of the first injection molding surface 220 ′. The injection mold 20' includes a top wall 21', a bottom wall 22', and side walls 23'. The top wall 21' and the bottom wall 22' can be parallel to each other. The side wall 23' can be perpendicular to the top wall 21 and / or the bottom wall 22'. For example, the side wall 23' is perpendicular to the top wall 21', the side wall 23' can also be perpendicular to the bottom wall 22', or at least a portion of the side wall 23' can be perpendicular to the bottom wall 22'. In other embodiments, the side wall 23' can also include an outermost circumferential side wall, or the side wall 23' includes an outermost circumferential side wall and multiple side walls spaced apart in between. The first injection molding surface 220' is located on the bottom wall 22', the second injection molding surface 210' and the fourth injection molding surface 211' are located on the top wall 21', and the third injection molding surface 230' is located on the side wall 23'. The fourth injection molding surface 211' is disposed peripherally of the second injection molding surface 210' and is parallel to the first injection molding surface 220'. In some embodiments, a positioning mechanism 221' may be provided on the first injection molding surface 220'. The positioning mechanism 221' may include at least two positioning posts, positioning holes, or positioning steps. The display element 30' is placed on at least two positioning mechanisms 221' to secure or pre-secure the display element 30'.In other embodiments, the positioning mechanism 221' can also be a positioning hole (not shown in the figure), and the display element 30' can be provided with a positioning column 2210, and the two cooperate with each other to achieve pre-fixation of the display element 30' on the first injection molding surface 220'; the pre-fixation here can mean that the display element 30' is supported, positioned or fixed by the positioning column 2210, etc. Of course, the number of positioning columns 2210 or positioning holes can also be 3, 4 or other numbers, as long as the display element can be positioned or pre-fixed. In other embodiments, the positioning mechanism can also be understood as a similar positioning or pre-fixing method such as snap-on, bonding or bolts; the side surfaces of the step portions of the two positioning columns 2210 are The lateral distance between them can be less than or equal to the minimum lateral distance between the third injection molding surfaces 230', so that the display element 30' can be conveniently placed directly on the positioning post 2210 from above. Of course, in other embodiments, the lateral distance between the side faces of the step portions of the two positioning posts 2210 can also be greater than the minimum lateral distance between the third injection molding surfaces 230'. In this case, the display element 30' can be placed on the positioning post 2210 from the side rather than from above; wherein the vertical height of the positioning post 2210 can be lower than the third injection molding surface 230', and a gap is left between the positioning post 2210 and the side wall 23', which can ensure that the display element 3 can be placed on the positioning post 2210. The top wall 21' protrudes toward the first injection molding surface 220' to form a first protrusion 200'. At least a portion of the surface of the first protrusion 200' forms a second injection molding surface 210'. The second injection molding surface 210' may include any one of an inclined surface, a spherical surface, an aspherical surface, or a free-form surface. The fourth injection molding surface 211' is disposed along the contour of the first protrusion 200'. The side wall 23' protrudes in a transverse direction to form the second protrusion 201'. It will be understood that the transverse direction here may be, for example, the direction connecting two adjacent cavities in FIG. 49. At least a portion of the surface of the second protrusion 201' forms a third injection molding surface 230'. The third injection molding surface 230' may face the second injection molding surface 210' and the fourth injection molding surface 211'. For example, the third injection molding surface 230' may be inclined relative to the fourth injection molding surface 211'. Of course, the third injection molding surface 230' may include any one of an inclined surface, a spherical surface, an aspherical surface, or a free-form surface. If the third injection molding surface 230' is non-planar, the third injection molding surface 230' may not be inclined relative to the fourth injection molding surface 211'. In some embodiments, the transverse dimension of the second injection molding surface 210' may be greater than or equal to the transverse dimension of the first injection molding surface 220', wherein the first injection molding surface 220' and the second injection molding surface 210' may be centrally aligned. The maximum transverse dimension of the third injection molding surface 230' is equal to the transverse dimension of the fourth injection molding surface 211'.An inlet 231' and an outlet 232' are provided on opposite sides of the side wall 23', respectively, for communicating with the outside and the injection cavity, so as to perform injection molding in the injection cavity. The vertical heights of the inlet 231' and the outlet 232' may both be higher than the third injection molding surface 230', and the position of the inlet 231' may be flush with the position of the outlet 232', as shown in FIG49. In some other embodiments, the inlet 231' may also be provided on the top wall 21' and / or the bottom wall 22', and the outlet 232' may also be provided on the top wall 21' and / or the bottom wall 22' accordingly. For example, the top wall 21' may be provided with the inlet 231', and the bottom wall 22' may be provided with the outlet 232'. The number of the inlet 231' and the outlet 232' may be selected and set according to the actual size of the injection molding array, as long as uniform injection molding can be achieved.

[0236] In some embodiments, the first injection molding surface 220' and the fourth injection molding surface 211' can be planes, and the second injection molding surface 210' and the third injection molding surface 230' can be spherical, aspherical or free-form surfaces, etc.; the first injection molding surface 220' and the third injection molding surface 230' are two different surfaces, and the fourth injection molding surface 211' and the second injection molding surface 210' are two different surfaces.

[0237] In other embodiments, the first injection molding surface 220' and the second injection molding surface 210' are the same surface, for example, both can be spherical, aspherical, or free-form surfaces, and the first injection molding surface 220' and the second injection molding surface 210' can have the same contour shape, for example, a polygon, a circle, or an ellipse, etc. The second injection molding surface 210' and the fourth injection molding surface 211' can be the same surface, for example, both can be spherical, aspherical, or free-form surfaces, for example, generated using Zernike polynomials. In other embodiments, the first injection molding surface 220', the second injection molding surface 210', the third injection molding surface 230', and the fourth injection molding surface 211' are the same surface, and can be designed using the same function in optical design, for example, generated using Zernike polynomials.

[0238] In some embodiments, the positioning mechanism 221 ′ provided on the first injection molding surface 220 ′ may surround the first injection molding surface 220 ′, and the positioning mechanism 221 ′ may be configured to fix or pre-fix the display element 30 ′.

[0239] In some embodiments, the injection molding cavities include a plurality of cavities arranged in an array, and the inlet 231' of the middle injection molding cavity communicates with the outlet 232' of the adjacent injection molding cavity. It is understood that, in two adjacent injection molding cavities, the inlet 231' of one injection molding cavity communicates with the outlet 232' of the other injection molding cavity. The outlet 232' may be relative to the inlet 231' in a single array. In some embodiments, the outlet 232' may be the inlet 231' of another adjacent cavity.

[0240] Alternatively, the cavity formed by the injection mold can be a regular shape such as a cylinder, a prism, or a truncated cone. For example, it can be a cavity arranged in an array, wherein the cavities in the array can be of the same size. Of course, the cavities in the array can also have different sizes, such as having regularly arranged sizes, such as the sizes of the cavities in the array arranged in a transverse direction increasing in sequence, or the sizes varying at alternating intervals. In cavities of different sizes, the spacing between the corresponding positioning posts 2210 can also be different, so that display elements of different sizes can be placed in subsequent steps, such as step 12, and a single injection molding process can be used to form modules of different sizes.

[0241] Step S12: placing a display element on the first injection molding surface.

[0242] It is understood that the display element 30' can be placed on the first injection molding surface 220' first. For example, the size of the first injection molding surface 220' can be set to be exactly adapted to the display element 30'. For example, after the display element 30' is placed, the display element 30' can be positioned, thereby reducing the possibility of its shaking. In other embodiments, the display element 30' can be positioned and placed on the first injection molding surface 220' by bonding, welding, or clamping. In some embodiments, the positioning mechanism 221' may include a positioning post, a positioning hole, or a positioning step, etc. Taking the positioning mechanism 221' as an example of a positioning post, the display element 30' is placed on at least two positioning posts 2210. In other embodiments, the positioning post 2210 may also be provided with a step portion, and the display element 30' is placed between the at least two step portions to pre-place or fix the display element 30'. For example, a fixture can be used to clamp the display element 30' to the positioning post 2210. In some embodiments, the display element 30' may further include a backplate 310' and a microdisplay 320'. The backplate 310' may be a substrate or circuit board. In some embodiments, the backplate 310' and microdisplay 320' may be a packaged integral module, rather than separate backplate 310' and microdisplay 320'. The microdisplay 320' may be a light-emitting element, and the circuit board and light-emitting element are electrically connected. The backplate 310' is placed on the first injection molding surface 220', and the microdisplay 320' is placed on the backplate 310', as shown in Figure 50. It is understood that the positioning mechanism 221' is used to secure the backplate 310' and microdisplay 320'. The backplate 310' can be connected to an external circuit for image signal input and power supply, and the microdisplay 320' provides the displayed image content. The microdisplay 320' can be understood as the same or similar to the microdisplay 6. The description of this component is referenced in the above embodiment and will not be repeated here.

[0243] Step S13: Injection molding is performed in the injection molding cavity to form a main body (base) in the injection molding cavity. The main body includes a light incident surface corresponding to the display element, a first reflective surface corresponding to the second injection molding surface, a second reflective surface corresponding to the third injection molding surface, and a light emitting surface corresponding to the fourth injection molding surface; the light incident surface is bonded to the display element.

[0244] In some embodiments, injection molding is performed in the injection cavity at the inlet port 231' on the side wall 23' of the injection mold 20' to form the main body 40'. The light incident surface 420' is completely in contact with the display element 30' without any gap. It can be understood that the solidified molten main body material can further fix the display element 30' and the formed main body 40' together, thereby reducing the subsequent process of applying optical glue to the display element 30' or the main body 40' to bond the two, as shown in Figure 51. Specifically, the molten main body material is poured into the inlet port 231' on the side wall 23' of the injection mold 20' to form the main body 40' in the injection cavity. The main body material includes but is not limited to glass, sulfide glass, polymethyl methacrylate (PMMA plastic), polycarbonate (PC plastic) and resin.

[0245] In some embodiments, when the injection molding cavity contains air as the medium, the micro display screen 320 ′ and the back panel 310 ′ are assembled in a post-assembly manner after the cavity is machined.

[0246] Step S14: removing the injection mold; wherein the light of the display element is configured to enter the main body from the light incident surface, be reflected by the first reflective surface and the second reflective surface in sequence, and then be emitted through the light emitting surface.

[0247] In some embodiments, the molten main body material is poured into the injection molding cavity and allowed to cool sufficiently until the temperature of the main body material is significantly below the corresponding solidification point. At this point, the injection mold 20' can be removed, for example, by using a fixture to demold the mold 20' to expose the main body 40'. The main body 40' includes a light incident surface 420' corresponding to the display element 30', a first reflective surface 410' corresponding to the second injection molding surface 210', a second reflective surface 430' corresponding to the third injection molding surface 230', and a light emitting surface 411' corresponding to the fourth injection molding surface 211', as shown in FIG52. Alternatively, in another embodiment, if the temperature of the molten main body material is not below the corresponding solidification point after pouring into the injection molding cavity, the main body material can be further cooled by air cooling, water cooling, or natural heat dissipation to below the corresponding solidification point. The injection mold 20' can then be removed, exposing the main body 40'. At this point, the display element 30' can be fixed to the main body 40' as a whole.

[0248] In some embodiments, the light emitting surface 411' and the light incident surface 420' can be planes, and the first reflective surface 410' and the second reflective surface 430' can be planes, spherical surfaces, aspherical surfaces or free-form surfaces, etc.; the light emitting surface 411' and the first reflective surface 410' are two different surfaces, and the second reflective surface 430' and the light incident surface 420' are two different surfaces.

[0249] In other embodiments, the light incident surface 420' and the first reflective surface 410' are the same continuous surface, for example, both can be spherical, aspherical, or free-form surfaces, and the contour shapes of the light incident surface 420' and the first reflective surface 410' can be the same, for example, polygonal, circular, or elliptical, etc. The first reflective surface 410' and the light emitting surface 411' can be the same continuous surface, for example, both can be spherical, aspherical, or free-form surfaces, for example, generated using Zernike polynomials; in other embodiments, the light incident surface 420', the first reflective surface 410', the second reflective surface 430', and the light emitting surface 411' are the same continuous surface, and can be designed by the same function in optical design, for example, generated using Zernike polynomials. For this part, please refer to the description of the relevant embodiments above.

[0250] In some embodiments, after removing the injection mold, the process further includes cutting the connected multiple bodies. Specifically, two adjacent bodies are cut along the runner opening to separate the adjacent bodies into a single body, as shown in FIG53 . Cutting methods include, but are not limited to, mechanical cutting and laser cutting.

[0251] In some embodiments, the individual bodies formed after cutting are polished to remove residual materials and burrs on the surface of the body, as shown in Figure 54. Optionally, the polishing method can be mechanical polishing, wet polishing, dry polishing, etc.

[0252] In some embodiments, the body formed after cutting can be further processed. The body 40' includes a side surface 440', a bottom surface 450', and a top surface 460'. The side surface 440' includes a second mirror surface 530'. The top surface 460' includes a first mirror surface 510' and a light-emitting surface 411'. The bottom surface 450' includes a through hole 470'. The through hole 470' can be formed corresponding to the positioning post 2210 provided on the first injection molding surface 220'. For example, if the position of the positioning post 2210 is not filled with molten body material, after removing the mold 20, the through hole 470' can be formed at the position corresponding to the positioning post 2210. In some embodiments, the body 40' can first be subjected to mirror evaporation, and then the evaporated body 40' can be encapsulated. Specifically, the first reflective surface 410' of the body 40' is evaporated to form the first mirror surface 510'; and the second reflective surface 430' of the body 40' is evaporated to form the second mirror surface 530', as shown in Figure 55. A metal mask can be used to mask areas other than the first reflective surface 410', allowing a layer of metal to be vapor-deposited on the first reflective surface 410' to form the first mirror surface 510'. The metal can be aluminum, silver, or a mixture of aluminum and silver. The same method described above can be used to vapor-deposit a layer of metal on the second reflective surface 430' to form the second mirror surface 530', or other vapor deposition methods such as sputtering or ion plating can be used. When vapor-depositing a layer of metal on the second reflective surface 430' to form the second mirror surface 530', the metal vapor deposition direction can be rotated or fixed. It should be noted that there is no fixed order in which the first and second mirror surfaces 510', 530', are formed. Furthermore, the metals used to form the mirror surfaces can be the same or different.

[0253] Optionally, a conductive structure 480' is provided in the through-hole 470' of the main body 40' after vapor deposition. The conductive structure may be a metal or alloy, etc., so that the display element 30' is electrically connected through the conductive structure. For example, the conductive structure 480' may be provided in the through-hole 470' by welding or other methods, and then packaged while still allowing the conductive structure 480' to be exposed relative to the packaging material to achieve electrical conduction between the conductive structure 480' and the outside. In other embodiments, the conductive structure 480' may also be provided in the form of corresponding male and / or female plugs. For example, the conductive structure 480' may be an electrical male plug, which may be electrically connected to the display element 30' and may be connected to an external power supply or driver by plugging an electrical female plug. Alternatively, the conductive structure 480' may be an electrical female plug sleeved in the through-hole 470', which may be electrically connected to the display element 30' and may be connected to an external power supply or driver by plugging a cable with an electrical male plug. Of course, the electrical connection of the above-mentioned conductive connection structure may also be spot welding or other electrical connection methods. In some embodiments, an encapsulation layer 70' may be provided on the side surface 440' of the main body 40'. In other embodiments, an encapsulation layer 70' may be further provided on the bottom surface 450'. In some embodiments, an optical protective layer 8' may be formed on the top surface 460' of the main body 40'. The optical protective layer 8' and the light-transmitting layer 8 in the above-mentioned embodiments may be understood to be the same or similar. As shown in Figure 56, the materials forming the encapsulation layer 70' include, but are not limited to, black epoxy resin, black silicone rubber, carbon black, nickel black, black chrome, and Vanta black. It should be noted that the encapsulation material may not cover the light-emitting surface 411'. The optical protective layer 8' may be made of a light-transmitting material. It does not change the original light propagation path and can protect the light-emitting surface 411' and the first mirror surface 510', reducing wear and tear on them and preventing dust and other debris from entering and affecting their optical efficiency.

[0254] In some embodiments, the through-holes 470' corresponding to the positioning posts 2210 provided on the first injection molding surface 220' can be filled, for example, with columns of the same shape, or covered with a cover plate. The main body 40' is then packaged. The packaging sequence can also be to first form a first packaging layer on the side surface 440' of the main body 40', then form a second packaging layer on the bottom surface 450' of the main body 40', and finally form an optical protective layer 8' on the top surface 460' of the main body. After packaging is completed, the filler or covering is removed, exposing the through-holes so that the back plate 310' can be metal-connected through the through-holes.

[0255] Optionally, in another embodiment, the demoulded main body 40 ′ may be evaporated first, then cut, and the cut main body 40 ′ may be polished and finally packaged.

[0256] It is understandable that in the preparation process of the near-eye display module, there are currently problems such as high preparation cost and complex process. For example, the existing technology mostly uses additional fixtures to align, bond, and fit the optical module and the display after forming the optical module, and then performs subsequent packaging and other operations. This process may require additional fixtures or operating steps to first clamp and position the optical module and the display separately, and then bond the two together, which requires more fixtures, workstations or steps. In this embodiment, an injection mold is provided, and the near-eye display module is prepared by injection molding. The display element is directly pre-fixed and placed in the injection mold in advance. During the process of injection molding to form the near-eye display module, the molten and solidified near-eye display module and the display element can be directly fixed, reducing the subsequent steps of aligning, bonding, and fitting the optical module and the display separately, making the entire preparation process more streamlined; in addition, since the display element is integrated with the main body, there is no need to use fixture clamping and other methods for bonding, reducing related fixtures, workstations, etc., thereby effectively reducing production costs.

[0257] The present application provides a method for preparing a near-eye display module. The preparation method includes: providing an injection mold, the injection mold including an injection molding cavity, the inner surface of the injection molding cavity including at least a first injection molding surface, a second injection molding surface, a third injection molding surface and a fourth injection molding surface, the first injection molding surface and the second injection molding surface are arranged opposite to each other, the second injection molding surface and the fourth injection molding surface are located on the same side, and the third injection molding surface is located on the side of the first injection molding surface; placing a display element on the first injection molding surface; performing injection molding in the injection molding cavity to form a main body in the injection molding cavity, the main body including a light incident surface corresponding to the display element, a first reflective surface corresponding to the second injection molding surface, a second reflective surface corresponding to the third injection molding surface, and a light emitting surface corresponding to the fourth injection molding surface; removing the injection mold; wherein, light from the display element enters the main body from the light incident surface, is reflected by the first reflective surface and the second reflective surface in sequence, and then is emitted through the light emitting surface. In the above manner, an injection mold is used to prepare a near-eye display module by injection molding, wherein the display element and the main body are integrated into a whole, and there is no need to use a separate clamp to clamp the display element and the main body for bonding, thereby effectively reducing the production cost; in addition, the near-eye display module is small in size, and users can choose to wear different glasses according to their needs. At the same time, the near-eye display module can be used to bring digital content display effects, thereby improving the user's wearing experience.

[0258] Refer to FIG57 , which is a flow chart of another embodiment of a method for preparing a near-eye display module provided by the present application. The method specifically includes the following steps:

[0259] Step S31: Provide an injection mold, the injection mold includes an injection cavity, the inner surface of the injection cavity includes at least a first injection molding surface, a second injection molding surface, a third injection molding surface and a fourth injection molding surface, the first injection molding surface and the second injection molding surface are arranged opposite to each other, the second injection molding surface and the fourth injection molding surface are located on the same side, and the third injection molding surface is located on the side of the first injection molding surface.

[0260] In some embodiments, the injection mold 20' includes an injection cavity, the inner surface of which includes at least a first injection molding surface 220', a second injection molding surface 210', a third injection molding surface 230', and a fourth injection molding surface 211'. The first injection molding surface 220' and the second injection molding surface 210' are arranged opposite each other, the second injection molding surface 210' and the fourth injection molding surface 211' are located on the same side, and the third injection molding surface 230' is located on the side of the first injection molding surface 220. The injection mold 20' includes a top wall 21', a bottom wall 22', and a side wall 23'. The first injection molding surface 220' is located on the bottom wall 22', the second injection molding surface 210' and the fourth injection molding surface 211' are located on the top wall 21', and the third injection molding surface 230' is located on the side wall 23'. A positioning mechanism 221' is provided on the first injection molding surface 220'. The positioning mechanism 221' includes at least two positioning posts 2210. The positioning posts 2210 are provided with a step portion. The display element 30' is placed between the step portions of the at least two positioning posts 2210 to secure the display element 30'. The lateral distance between the side faces of the step portions of the two positioning posts 2210 can be less than or equal to the minimum lateral distance between the third injection molding surfaces 230'. Of course, in other embodiments, the lateral distance between the side faces of the step portions of the two positioning posts 2210 can also be greater than the minimum lateral distance between the third injection molding surfaces 230'. In this case, the display element 30' can be placed on the positioning posts 2210 from the side rather than from above. The vertical height of the positioning posts 2210 can be lower than the third injection molding surface 230', leaving a gap between the positioning posts 2210 and the sidewall 23'. The top wall 21' protrudes toward the first injection molding surface 220' to form a first protrusion 200'. At least a portion of the surface of the first protrusion 200' forms a second injection molding surface 210'. The second injection molding surface 210' includes any one of an inclined surface, a spherical surface, an aspherical surface, or a free-form surface. The fourth injection molding surface 211' is disposed around the contour of the first protrusion 200'. The side wall 23' protrudes laterally to form a second protrusion 201'. At least a portion of the surface of the second protrusion 201' forms a third injection molding surface 230'. The third injection molding surface 230' can be inclined relative to the fourth injection molding surface 211' and can face the second injection molding surface 210' and the fourth injection molding surface 211'. The third injection molding surface 230' includes any one of an inclined surface, a spherical surface, an aspherical surface, or a free-form surface. Among them, the lateral dimension of the second injection molding surface 210' is greater than or equal to the lateral dimension of the first injection molding surface 220', and the centers of the first injection molding surface 220' and the second injection molding surface 210' are aligned. The maximum lateral dimension of the third injection molding surface 230' can be equal to the lateral dimension of the fourth injection molding surface 211'. An inlet 231' and an outlet 232' connecting the outside and the injection molding cavity are respectively provided on opposite sides of the side wall 23' to perform injection molding in the injection molding cavity. The vertical heights of the inlet 231' and the outlet 232' are both higher than the third injection molding surface 230', and the position of the inlet 231' is flush with the position of the outlet 232'.In other embodiments, the inlet opening 231' can also be set on the top wall 21' and / or the bottom wall 22', and the outlet opening 232' can also be correspondingly set on the top wall 21' and / or the bottom wall 22'. For example, the top wall 21' is provided with an inlet opening 231', and the bottom wall 22' is provided with an outlet opening 232'. The number of the inlet openings 231' and the outlet openings 232' can be selected and set according to the actual size of the injection molding array, as long as uniform injection molding can be achieved. The shape of the injection molding surface can also refer to the description of the relevant embodiments above.

[0261] In some embodiments, a positioning mechanism 221' is provided on the first injection molding surface 220', and the positioning mechanism 221' may include a plurality of positioning posts 2210. The plurality of positioning posts 2210 may surround the first injection molding surface 220' to fix or pre-fix the display element 30'. In some embodiments, the injection molding cavity includes a plurality of injection ports 231' arranged in an array, and the inlet port 231' of the injection molding cavity located in the middle is connected to the outlet port 232 of the adjacent injection molding cavity. It is understandable that, in two adjacent injection molding cavities, the inlet port 231' of one injection molding cavity is connected to the outlet port 232' of the other injection molding cavity. Here, the outlet port 232' may be relative to the inlet port 231' in a single array. In some embodiments, the outlet port 232' may be the inlet port 231' of another adjacent cavity. Optionally, the cavity formed by the injection mold may be a regular shape such as a cylinder, a prism, or a truncated cone.

[0262] Step S32: placing a display element on the first injection molding surface.

[0263] In some embodiments, the positioning mechanism 221' may include a positioning post 2210, upon which the display element 30' is placed. In other embodiments, the positioning post 2210 may also include a stepped portion, with the display element 30' placed between at least two stepped portions to pre-position or secure the display element 30'. In some embodiments, the display element 30' may also include a backplate 310' and a microdisplay 320'. The backplate 310' may be a substrate or a circuit board, and the microdisplay 320' may be a light-emitting element. The circuit board and the light-emitting element are electrically connected. The backplate 310' is placed on the first injection molding surface 220', and the microdisplay 320' is placed on the backplate 310'. It is understood that the positioning mechanism 221' secures the backplate 310' and the microdisplay 320'. The backplate 310' may be connected to an external circuit for image signal input and power supply, while the microdisplay 320' provides the displayed image content. The micro display screen 320 ′ can be understood as the same or similar to the micro display screen 6 . For the description of this component, please refer to the above embodiment and will not be repeated here.

[0264] Step S33: Injection molding is performed in the injection molding cavity to form a main body in the injection molding cavity, wherein the main body includes a light incident surface corresponding to the display element, a first reflection surface corresponding to the second injection molding surface, a second reflection surface corresponding to the third injection molding surface, and a light emitting surface corresponding to the fourth injection molding surface; the light incident surface is bonded to the display element.

[0265] Specifically, molten main body material is poured into the inlet port 231' on the side wall 23' of the injection mold 20' to form the main body 40' in the injection cavity. The main body material includes but is not limited to glass, sulfide glass, polymethyl methacrylate (PMMA plastic), polycarbonate (PC plastic), and resin.

[0266] Step S34: removing the injection mold; wherein the light of the display element is configured to enter the main body from the light incident surface, be reflected by the first reflective surface and the second reflective surface in sequence, and then be emitted through the light emitting surface.

[0267] In some embodiments, the molten main material is poured into the injection cavity and allowed to cool sufficiently so that the temperature of the main material is far below the corresponding solidification point. The injection mold 20' can then be removed to expose the main body 40'. The main body 40' includes a light incident surface 420' corresponding to the display element 30', a first reflective surface 410' corresponding to the second injection molding surface 210', a second reflective surface 430' corresponding to the third injection molding surface 230', and a light emitting surface 411' corresponding to the fourth injection molding surface 211'.

[0268] 58 and 59 , FIG58 is a left perspective structural diagram of an injection mold according to an embodiment of the present application, and FIG59 is a left perspective structural diagram of an embodiment of the mold demolding corresponding to FIG58 . The injection mold 20 ' can be arranged in a 1×N array, where N can be 1, 2, 3 or other numbers. The injection mold can be divided into three sub-molds: a first sub-mold 24', a second sub-mold 25' and a third sub-mold 26', the second injection molding surface 210' and the fourth injection molding surface 211' are located on the first sub-mold 24'; the first injection molding surface 220' is located on the second sub-mold 25' and the third sub-mold 26'; the third injection molding surface 230' is located on the second sub-mold 25' and the third sub-mold 26'; wherein, the second sub-mold 25' and the third sub-mold 26' are symmetrical structures, that is, the first sub-mold 24' includes the second injection molding surface 210' and the fourth injection molding surface 211' of the injection mold, the second sub-mold 25' includes part of the first injection molding surface 220' and part of the third injection molding surface 230' of the injection mold, and the third sub-mold 26' includes part of the first injection molding surface 220' and part of the third injection molding surface 230'. It can be understood that the first sub-mold 24' of the injection mold can be removed from the top (in the direction of the arrow) to expose the light-emitting surface 411' and the first reflective surface 410' of the main body 40'; the second sub-mold 25' and the third sub-mold 26' are removed from the opposite sides, that is, the second sub-mold 25' is removed from the left (in the direction of the arrow), and the third sub-mold 26' is removed from the right (in the direction of the arrow) to expose the second reflective surface 430' of the main body 40'.

[0269] Understandably, compared to existing methods such as molding, this solution utilizes injection molding to prepare the near-eye display module. Because the display element is pre-fixed and placed in the injection mold during the injection molding process, it is difficult to simply remove the mold from the top and bottom after the molten main body material is poured into the injection cavity and solidified, otherwise it is likely to damage the main body. Therefore, the design of this embodiment allows for the mold to be removed from the top and left and right sides separately, allowing for smooth demolding and exposing the main body.

[0270] Step S35: cutting the connected multiple bodies.

[0271] In some embodiments, after removing the injection mold, two adjacent bodies are cut along the runner opening to separate the adjacent bodies into a single body. The cutting method includes but is not limited to mechanical cutting and laser cutting.

[0272] Step S36: grinding the main body to remove residual materials on the surface of the main body.

[0273] Optionally, the grinding method may be mechanical grinding, wet grinding, dry grinding, and the like.

[0274] Step S37: performing mirror evaporation on the main body.

[0275] In some embodiments, step S37 may specifically include performing vapor deposition on the first reflective surface of the main body to form a first mirror surface; and performing vapor deposition on the second reflective surface of the main body to form a second mirror surface.

[0276] Optionally, a metal mask can be used to mask areas other than the first reflective surface 410', allowing a layer of metal or alloy to be vapor-deposited on the first reflective surface 410' to form the first mirror surface 510'. The metal can be aluminum, silver, or a mixture of aluminum and silver. The same method described above can be used to vapor-deposit a layer of metal or alloy on the second reflective surface 430' to form the second mirror surface 530', or other vapor deposition methods, such as sputtering or ion plating, can also be used. When vapor-depositing a layer of metal on the second reflective surface 430' to form the second mirror surface 530', the metal vapor deposition direction can be rotated or the main body can be rotated in a fixed direction. It should be noted that there is no fixed order in which the first and second mirror surfaces 510', 530' are formed. Furthermore, the metals used to form the mirror surfaces can be the same or different.

[0277] Step S38: packaging the evaporated body.

[0278] In some embodiments, step S38 can specifically include forming an encapsulation layer on the side and bottom surfaces of the main body; and forming an optical protective layer on the top surface of the main body. In some embodiments, a conductive structure is set in the through hole of the evaporated main body 40' to electrically connect the display element 30' through the conductive structure, and then encapsulation is performed. Specifically, the main body 40' includes a side surface 440', a bottom surface 450', and a top surface 460'. The side surface 440' includes a second mirror surface 530', the top surface 460' includes a first mirror surface 510' and a light-emitting surface 411', and the bottom surface 450' includes a through hole 470'. The through hole 470' can be formed corresponding to the positioning post 2210 provided on the first injection molding surface 220'. For example, if the position of the positioning post 2210 is not filled with molten main body material, after removing the mold 20, the through hole 470' can be formed at the position corresponding to the positioning post 2210. A conductive structure 480' is set in the through hole 470' to electrically connect the display element 30' through the conductive structure. In some embodiments. Then, an encapsulation layer 70' is formed on the side surface 440' and the bottom surface 450' of the main body 40'; and an optical protection layer 8' is formed on the top surface 460' of the main body. The materials forming the encapsulation layer 70' include but are not limited to black epoxy resin, black silicone rubber, carbon black, nickel black, black chrome and Vanta black. It should be noted that the material used for encapsulation cannot cover the light-emitting surface 411'. The optical protection layer 8' can be a light-transmitting material, which does not change the propagation path of the original light, and can protect the light-emitting surface 411' and the first mirror surface 510', reduce their wear and tear, and reduce the entry of dust and other debris to affect their optical efficiency.

[0279] In some embodiments, the through hole 470', that is, the through hole formed corresponding to the positioning column 2210 provided on the first injection molding surface 220', is filled, such as with a column of the same shape, and can also be sealed with a cover plate. The main body 40' is then packaged. Specifically, a first packaging layer is formed on the side 440' of the main body 40', and then a second packaging layer is formed on the bottom surface 450' of the main body 40', and finally an optical protective layer 8' is formed on the top surface 460' of the main body. After the packaging is completed, the filler or covering is removed, and the through hole 470' is exposed so that the back plate 310' can be electrically connected to the metal conductive structure 480' through the through hole. In another embodiment, the demolded main body 40' can be first evaporated and then cut, and the cut main body 40' is polished and finally packaged.

[0280] Refer to Figure 60, which is a structural schematic diagram of an embodiment of a near-eye display module provided by the present application. The near-eye display module 100' is a near-eye display module 100' prepared by the preparation method as described above. In some embodiments, the overall length, width and height dimensions of the near-eye display module 100' may not be greater than 2 mm. In some embodiments, the light emitted by the micro display screen 320' in the near-eye display module 100' enters the main body 40' from the light incident surface 420', and is reflected by the first reflective surface 410' provided with the first mirror 510' and the second reflective surface 430' provided with the second mirror 530' in sequence, and then exits through the light emitting surface 411'.

[0281] In some embodiments, the near-eye display module 100' can be mounted on the lens or frame of a near-eye display device (e.g., glasses, goggles, helmets, virtual reality devices, mixed reality devices, etc.). Of course, such near-eye reality devices can also include eye-tracking sensors to track and determine eye orientation. In some embodiments, the entire near-eye display module 100' can be cylindrical or prismatic, etc.

[0282] In some embodiments, the injection mold 20' includes an injection cavity, the inner surface of which includes at least a first injection surface 220', a second injection surface 210', a third injection surface 230', and a fourth injection surface 211'; the first injection surface 220' and the second injection surface 210' are arranged opposite to each other. The first injection molding surface 220' is configured to place the display element 30', the second injection molding surface 210' and the fourth injection molding surface 211' are located on the same side, the third injection molding surface 230' is located on the side of the first injection molding surface 220', and the injection molding cavity is configured to receive injection molding material to form a main body 40', wherein the main body 40' includes a light incident surface 420' corresponding to the display element 30', a first reflection surface 410' corresponding to the second injection molding surface 210', a second reflection surface 430' corresponding to the third injection molding surface 230', and a light emitting surface 411' corresponding to the fourth injection molding surface 211'; the light incident surface 420' is in contact with the display element 30', and the light of the display element 30' is configured to enter the main body 40' from the light incident surface 420', and then be reflected by the first reflection surface 410' and the second reflection surface 430' in sequence, and then be emitted through the light emitting surface 411'. Injection mold 20' includes a top wall 21', a bottom wall 22', and side walls 23'. A first injection molding surface 220' is located on bottom wall 22', a second injection molding surface 210' and a fourth injection molding surface 211' are located on top wall 21', and a third injection molding surface 230' is located on side wall 23'. A positioning mechanism 221' is provided on first injection molding surface 220'. The transverse dimension of second injection molding surface 210' can be greater than or equal to the transverse dimension of first injection molding surface 220', and first injection molding surface 220' and second injection molding surface 210' can be centrally aligned. The maximum transverse dimension of third injection molding surface 230' can be equal to the transverse dimension of fourth injection molding surface 211'. Of course, if it is not limited to a cylindrical shape, the maximum transverse dimension of third injection molding surface 230' and the transverse dimension of fourth injection molding surface 211' can also have other size relationships. The top wall 21' protrudes toward the first injection molding surface 220' to form a first protrusion 200'. At least a portion of the surface of the first protrusion 200' forms a second injection molding surface 210'. The second injection molding surface 210' includes any one of an inclined surface, a spherical surface, an aspherical surface, or a free-form surface. The fourth injection molding surface 211' is disposed along the contour of the first protrusion 200'. The side wall 23' protrudes in a transverse direction to form a second protrusion 201'. At least a portion of the surface of the second protrusion 201' forms a third injection molding surface 230'. The third injection molding surface 230' is non-parallel to the fourth injection molding surface 211' and faces the second injection molding surface 210' and the fourth injection molding surface 211'. The third injection molding surface 230' includes any one of an inclined surface, a spherical surface, an aspherical surface, or a free-form surface. The positioning mechanism 221' includes a positioning column 2210 and / or a positioning hole. The positioning column 2210 and / or the positioning hole are provided with steps. The display element 30' is placed between the steps to pre-fix the display element 30'. There are at least two positioning mechanisms 221'.The lateral distance between the side faces of the stepped portions of the two positioning posts 2210 is less than or equal to the minimum lateral distance between the third injection molding surfaces 230', the vertical height of the positioning posts 2210 is lower than the third injection molding surface 230', and a gap is left between the positioning posts 2210 and the side wall 23'. An inlet 231' and an outlet 232' are provided on opposite sides of the side wall 23', connecting the exterior and the injection molding cavity, respectively, to facilitate injection molding within the injection molding cavity. The vertical heights of the inlet 231' and the outlet 232' are both higher than the third injection molding surface 230', and the position of the inlet 231' is flush with the position of the outlet 232', as shown in FIG48. This facilitates the formation of a reference surface for the injection cooling and solidification of the second reflective surface 430' at a position corresponding to the non-vertical third injection molding surface 230'.

[0283] In some other embodiments, the inlet port 231' can also be set on the top wall 21' and / or the bottom wall 22', and the outlet port 232' can also be correspondingly set on the top wall 21' and / or the bottom wall 22'. For example, the top wall 21' is provided with an inlet port 231', and the bottom wall 22' is provided with an outlet port 232'. The number of inlet ports 231' and outlet ports 232' can be selected and set according to the actual size of the injection molding array, as long as uniform injection molding can be achieved. In some embodiments, the injection molding cavity includes a plurality of injection molding cavities arranged in an array, and the inlet port 231' of the injection molding cavity located in the middle is connected to the outlet port 232 of the adjacent injection molding cavity. It can be understood that, in two adjacent injection cavities, the inlet 231' of one injection cavity is connected to the outlet 232' of the other injection cavity, and the outlet 232' here can be relative to the inlet 231' in a single array. In some embodiments, the outlet 232' can be the inlet 231' of another adjacent cavity.

[0284] An embodiment of the present application provides a method for preparing a near-eye display module, wherein: an injection mold is provided, the injection mold includes an injection molding cavity, the inner surface of the injection molding cavity includes at least a first injection molding surface, a second injection molding surface, a third injection molding surface and a fourth injection molding surface, the first injection molding surface and the second injection molding surface are arranged opposite to each other, the second injection molding surface and the fourth injection molding surface are located on the same side, and the third injection molding surface is located on the side of the first injection molding surface; a display element is placed on the first injection molding surface; injection molding is performed in the injection molding cavity to form a mirror body in the injection molding cavity, the mirror body includes a light incident surface corresponding to the display element, a first reflection surface corresponding to the second injection molding surface, a second reflection surface corresponding to the third injection molding surface, and a light output surface corresponding to the fourth injection molding surface; the light incident surface is bonded to the display element; the injection mold is removed; wherein the light of the display element is configured to enter the mirror body from the light incident surface, and then be reflected by the first reflection surface and the second reflection surface in sequence, and then be output through the light output surface. The injection mold includes a top wall, a bottom wall, and side walls. The first injection molding surface is located on the bottom wall, the second and fourth injection molding surfaces are located on the top wall, and the third injection molding surface is located on the side wall. A positioning mechanism is provided on the first injection molding surface, and the display element is disposed on the positioning mechanism. The lateral dimension of the second injection molding surface is greater than or equal to the lateral dimension of the first injection molding surface, and the first and second injection molding surfaces are centrally aligned. The maximum lateral dimension of the third injection molding surface is equal to the lateral dimension of the fourth injection molding surface. The injection mold also includes a removable first sub-mold, a second sub-mold, and a third sub-mold. The second and fourth injection molding surfaces are located on the first sub-mold; the first injection molding surface is located on the second and third sub-molds; and the third injection molding surface is located on the second and third sub-molds. The second and third sub-molds are symmetrical. The second and third injection molding surfaces include any of inclined surfaces, spherical surfaces, aspherical surfaces, or free-form surfaces. The fourth injection molding surface is disposed peripherally of the second injection molding surface and is parallel to the first injection molding surface. The top wall protrudes toward the first injection molding surface to form a first protrusion, at least a portion of the surface of the first protrusion forms a second injection molding surface, and the fourth injection molding surface is arranged around the contour direction of the first protrusion; the side wall protrudes laterally to form a second protrusion, at least a portion of the surface of the second protrusion forms a third injection molding surface, the third injection molding surface is not parallel to the fourth injection molding surface, and the third injection molding surface faces the second injection molding surface and the fourth injection molding surface. The positioning mechanism includes positioning posts and / or positioning holes, and the positioning posts and / or positioning holes are provided with step portions, and the display element is placed between the step portions to pre-fix the display element; the number of positioning mechanisms is at least two. The lateral distance between the side faces of the step portions of adjacent positioning posts and / or positioning holes is less than or equal to the minimum lateral distance between the third injection molding surfaces, and the vertical height of the positioning posts is lower than the third injection molding surface; a gap is left between the positioning posts and / or positioning holes and the side walls.

[0285] Wherein, an inlet and an outlet are provided on the side wall, the top wall and / or the bottom wall to perform injection molding in the injection molding cavity; wherein, the vertical heights of the inlet and the outlet are not flush with the third injection molding surface. wherein, an inlet and an outlet are provided on the side wall, and the position of the inlet is flush with the position of the outlet. wherein, the injection molding cavity includes a plurality of injection molding cavities arranged in an array, and the inlet of the injection molding cavity located in the middle is connected to the outlet of the adjacent injection molding cavity. wherein, after removing the injection mold, the method further includes: cutting the plurality of connected mirror bodies; polishing the mirror bodies to remove the residual material on the surface of the mirror bodies. wherein, after removing the injection mold, the method further includes: performing mirror evaporation on the mirror bodies; and packaging the evaporated mirror bodies.

[0286] The mirror body is subjected to mirror evaporation, including: evaporating the first reflective surface of the mirror body to form a first mirror surface; and evaporating the second reflective surface of the mirror body to form a second mirror surface; and encapsulating the evaporated mirror body, including: forming an encapsulation layer on the side surface of the mirror body; and forming an optical protective layer on the top surface of the mirror body. The mirror body also includes a through hole, which is formed by a positioning post provided on the first injection molding surface. The method also includes: disposing a conductive structure within the through hole so that the display element is electrically connected via the conductive structure.

[0287] The present application provides an injection mold, wherein the injection mold includes an injection molding cavity, and the inner surface of the injection molding cavity includes at least a first injection molding surface, a second injection molding surface, a third injection molding surface and a fourth injection molding surface; the first injection molding surface and the second injection molding surface are arranged opposite to each other, the first injection molding surface is configured to place a display element, the second injection molding surface and the fourth injection molding surface are located on the same side, and the third injection molding surface is located on the side of the first injection molding surface; the injection molding cavity is configured to receive injection molding material to form a mirror body, wherein the mirror body includes a light incident surface corresponding to the display element, a first reflection surface corresponding to the second injection molding surface, a second reflection surface corresponding to the third injection molding surface, and a light emitting surface corresponding to the fourth injection molding surface; the light incident surface is in contact with the display element, and the light of the display element is configured to enter the mirror body from the light incident surface, and then be reflected by the first reflection surface and the second reflection surface in sequence, and then be emitted through the light emitting surface.

[0288] The injection mold includes a top wall, a bottom wall, and side walls. The first injection molding surface is located on the bottom wall, the second and fourth injection molding surfaces are located on the top wall, and the third injection molding surface is located on the side wall. A positioning mechanism is provided on the first injection molding surface, and a display element is provided on the positioning mechanism. The lateral dimension of the second injection molding surface is greater than or equal to the lateral dimension of the first injection molding surface, and the centers of the first and second injection molding surfaces are aligned. The maximum lateral dimension of the third injection molding surface is equal to the lateral dimension of the fourth injection molding surface. The injection mold also includes a removable first sub-mold, a second sub-mold, and a third sub-mold. The second and fourth injection molding surfaces are located on the first sub-mold; the first injection molding surface is located on the second and third sub-molds; and the third injection molding surface is located on the second and third sub-molds. The second and third sub-molds are symmetrical. The second and third injection molding surfaces include any of inclined surfaces, spherical surfaces, aspherical surfaces, or free-form surfaces. The fourth injection molding surface is provided on the periphery of the second injection molding surface and is parallel to the first injection molding surface. The top wall protrudes toward the first injection molding surface to form a first protrusion, at least a portion of the surface of the first protrusion forms a second injection molding surface, and the fourth injection molding surface is arranged around the contour direction of the first protrusion; the side wall protrudes laterally to form a second protrusion, at least a portion of the surface of the second protrusion forms a third injection molding surface, the third injection molding surface is not parallel to the fourth injection molding surface, and the third injection molding surface faces the second injection molding surface and the fourth injection molding surface. The positioning mechanism includes positioning posts and / or positioning holes, and the positioning posts and / or positioning holes are provided with step portions, and the display element is placed between the step portions to pre-fix the display element; the number of positioning mechanisms is at least two. The lateral distance between the side faces of the step portions of adjacent positioning posts and / or positioning holes is less than or equal to the minimum lateral distance between the third injection molding surfaces, and the vertical height of the positioning posts is lower than the third injection molding surface; a gap is left between the positioning posts and / or positioning holes and the side walls. The side walls, top wall, and / or bottom wall are provided with inlet and outlet openings for injection molding into the injection cavity; wherein the vertical heights of the inlet and outlet openings are not flush with the third injection molding surface. The side walls are provided with inlet and outlet openings, and the positions of the inlet and outlet openings are flush with the positions of the outlet openings. The injection molding cavity includes a plurality of cavities arranged in an array, and the inlet opening of the central injection molding cavity is connected to the outlet opening of the adjacent injection molding cavity.

[0289] In some embodiments, referring to Figures 61-73, the present application further provides a method for manufacturing a near-eye display module, the method comprising:

[0290] S110. Provide a first mold 2000. The first mold 2000 includes a first accommodating cavity 402 and a second accommodating cavity 404 that are spaced apart. The inner wall of the first accommodating cavity 402 is provided with a first surface 301 and a convex surface 302. The first surface 301 is arranged around the convex surface 302. The second accommodating cavity 404 is provided with a second surface 303 and an annular surface 304. The annular surface 304 is arranged around the second surface 303. In some embodiments, the accommodating cavity may further include a side wall 33. The side wall 33 is connected to the annular surface 304. The side walls 33 may be parallel to each other. The first surface 301 and the second surface 303 can be planes, and the convex surface 302 and the torus 304 can be spherical, aspherical, or free-form surfaces, among others. The first surface 301, the second surface 303, the convex surface 302, and the torus 304 can be designed using the same function, for example, generated using Zernike polynomials. In some embodiments, the second surface 303 and the convex surface 302 can be the same surface, and both can have the same outer contour, such as a polygon, a circle, or an ellipse, for example, designed using the same function. In other embodiments, the first surface 301 and the convex surface 302 are the same continuous surface, and the second surface 303 and the torus 304 are the same continuous surface. For this part, reference can be made to the description of the above-mentioned related embodiments.

[0291] In some embodiments, the first accommodating cavity 402 and the second accommodating cavity 404 spaced apart in the provided first mold 2000 include at least one group, which can also be arranged in a straight line or array, etc. The lateral dimensions of the first accommodating cavity 402 and the second accommodating cavity 404 can be the same, wherein the first accommodating cavity 402 can be a plurality of continuously distributed, and the second accommodating cavity 404 can also be a plurality of continuously distributed, and the first accommodating cavity 402 and the second accommodating cavity 404 are spaced apart in the middle; optionally, the first accommodating cavity 402 and the second accommodating cavity 404 can also be alternately spaced apart; in other embodiments, the first accommodating cavity 402 and the second accommodating cavity 404 can also be arranged in other regular patterns, but at least a part of the first accommodating cavity 402 and the second accommodating cavity 404 are spaced apart. It is understood that the first and second accommodating cavities 402 and 404 can have the same lateral dimensions. In other embodiments, at least one group of first and second accommodating cavities 402 and 404 has the same lateral dimensions, while other groups of first and second accommodating cavities 402 and 404 may have different lateral dimensions. For example, in an array arrangement, the first and second alternating rows of first and second accommodating cavities 402 and 404 can have the same lateral dimensions, such as dimension A, while the first and second alternating rows of first and second accommodating cavities 402 and 404 can have the same lateral dimensions, such as dimension B, with A and B being different. This allows for batch production of various optical substrates of the same or different dimensions. The first and second accommodating cavities 402 and 404 having the same lateral dimensions can be understood as meaning that the lateral (e.g., maximum lateral) dimension of the annular surface 304 is equal to the lateral dimension of the first surface 301. The first and second accommodating cavities 402 and 404 having the same lateral dimensions can be combined into a complete optical substrate 501 after subsequent injection molding. In some embodiments, the lateral dimension of the convex surface 302 is greater than or equal to the lateral dimension of the second surface 303. In other embodiments, the first surface 301 and the second surface 303 are parallel to each other, or the first surface 301 and the second surface 303 are collinear with each other.

[0292] S120, providing a second mold 3000, the second mold 3000 being located on a side of the first mold 2000 facing the first accommodating cavity 402 and the second accommodating cavity 404;

[0293] The second mold 3000 may be a whole flat plate, and of course, a corresponding accommodating cavity may also be provided, wherein the second mold 3000 may be movable relative to the first mold 2000, for example, they may be pressed against each other.

[0294] S130 , injecting molten light-transmitting material between the first mold 2000 and the second mold 3000 to fill the first accommodating cavity 402 and the second accommodating cavity 404 ;

[0295] In which, one or both of the first mold 2000 and the second mold 3000 may be provided with an injection hole, and the molten light-transmitting material may be injected through the injection hole. In other embodiments, there is a gap between the first mold 2000 and the second mold 3000, and the material may also be injected through the gap; wherein, the molten light-transmitting material may be a transparent molten material, for example, any one of polymethyl methacrylate, polycarbonate, plastic, resin or glass.

[0296] S140, pressing the first mold 2000 and the second mold 3000 together so that the molten light-transmitting material is fully attached to the first surface 301 and the convex surface 302, the second surface 303 and the annular surface 304;

[0297] The first mold 2000 and the second mold 3000 can be clamped using a fixture or the like. One of the molds can be positioned and fixed, and the other mold can be pressed together in a fixed orientation. For example, the first mold 2000 having the first accommodating cavity 402 and the second accommodating cavity 404 can be fixed, and the second mold 3000 can be pressed toward the first mold 2000 using a pressure mechanism or the like. In some embodiments, the two molds can also be simultaneously controlled to move toward each other for pressing. Pressing together allows the molten material to fully adhere to the first surface 22 and the raised surface 21, and the second surface 31 and the annular surface 32, and this process allows excess molten material to overflow. It can be understood that the pressing process can make the molten material fully fit with the first surface 22 and the raised surface 21, the second surface 31 and the annular surface 32. In addition, it is also necessary to control the height of the corresponding optical matrix to be formed to meet the preset size. After pressing the first mold 2000 and the second mold 3000, the first accommodating cavity 402 and the second accommodating cavity 404 can be independent cavities, that is, the accommodating cavities are not connected to each other, and the subsequently formed optical matrix is ​​independent of each other and not connected into a whole. Suction cups and other transfer processing can be used subsequently, which is conducive to flexible acquisition of the desired optical matrix; in other embodiments, the first accommodating cavity 402 and the second accommodating cavity 404 can be interconnected cavities, that is, the accommodating cavities can be connected to each other, and the subsequently formed optical matrix is ​​a whole that is connected to each other, thereby facilitating sorting and transfer processing, etc.

[0298] S150. After the molten light-transmitting material is cooled and solidified, the first mold 2000 and the second mold 3000 are demolded to obtain the first optical matrix 501 and the second optical matrix 502 formed after the molten light-transmitting material is solidified, wherein the structure of the first optical matrix 501 corresponds to the first surface 301 and the convex surface 302, and the structure of the second optical matrix 502 corresponds to the second surface 303 and the annular surface 304.

[0299] It can be understood that after the molten light-transmitting material is sufficiently cooled, it can be separated by clamping the mold with a clamp or the like. The demolding may form an overall array of the first optical substrate 501 and the second optical substrate 502 connected together, or the first optical substrate 501 and the second optical substrate 502 are independent of each other; in other embodiments, the first optical substrate 501 and the second optical substrate 502 with the same lateral size may be a whole, and different lateral sizes may constitute different array wholes, and the specific design can be based on actual conditions.

[0300] It can be understood that the above-mentioned method of the present application does not require cutting of the main material, which reduces the loss of raw materials and greatly reduces production costs. By designing a plurality of different design surfaces, such as the first surface 301 and the convex surface 302, the second surface 303 and the annular surface 304, on a single mold, and then injecting the molten material so that it fits the corresponding design surface, the number of molds developed is effectively reduced. Since the first surface 301 and the convex surface 302, the second surface 303 and the annular surface 304 are all on the same side, the first optical substrate 501 and the second optical substrate 502 formed can also be on the same side. Therefore, in subsequent steps (such as coating), they can be processed at one time without having to process the two separate surfaces separately, effectively reducing the processing steps and greatly reducing production costs. In some embodiments, before demolding the first mold 2000 and the second mold 3000, it is also included to determine whether the temperature of the injected molten light-transmitting material has dropped below the corresponding solidification point. If so, demolding can be performed. If not, cooling is required, for example, by using air cooling, water cooling or natural heat dissipation.

[0301] In some embodiments, referring to Figures 62-65, the first accommodating cavity 402 and the second accommodating cavity 404 of the first mold 2000 are provided with the same lateral dimensions. It will be understood that the lateral dimensions of all first accommodating cavities 402 and second accommodating cavities 404 are the same, which ensures that all first optical substrates 501 and second optical substrates 502 can be formed into a regular whole during subsequent processing without introducing additional processing steps such as cutting and polishing, thereby reducing costs. In other embodiments, at least one group of first accommodating cavities 402 and second accommodating cavities 404 have the same lateral dimensions, and the lateral dimensions of the first accommodating cavities 402 and second accommodating cavities 404 between multiple groups can vary, thereby enabling the batch production of optical substrates of different sizes.

[0302] The first end of the first optical substrate 501 includes a first wall 512 and a recessed wall 515 lower than the first wall 512. The first wall 512 surrounds the recessed wall 515. The second end of the first optical substrate 501, opposite the first end, includes a first pressing wall 513. The first pressing wall 513 may be a wall formed by pressing by the second mold 3000. The first end of the second optical substrate 502 includes a second wall 521 and an annular wall 522. The second end of the second optical substrate 502, opposite the first end, includes a second pressing wall 523. The second pressing wall 523 may be a wall formed by pressing by the second mold 3000. The second pressing wall 523 and the first pressing wall 513 may have the same or complementary shapes. For example, the second pressing wall 523 and the first pressing wall 513 may both be flat walls.

[0303] The shape of the first surface 301 is identical to that of the first wall 512, the shape of the annular wall 522 is complementary to that of the annular surface 304, the shape of the second surface 303 is identical to that of the second wall 523, and the shape of the concave wall 515 is complementary to that of the convex surface 302. The term "complementary" here can be understood as meaning that the two surfaces remain integrally formed when joined, without a noticeable gap. For example, if one surface is concave and the other is convex, the two surfaces remain integrally formed when joined. The first and second press-fit walls 513, 523 can be of the same or different heights, and their shapes can complement each other to form a single unit, for example, without a gap. In other embodiments, one of the second press-fit wall 523 and the first press-fit wall 513 may have one or more protrusions and the other may have one or more corresponding grooves, so that the two surfaces remain integrally formed when joined, without a noticeable gap. Alternatively, if one of the second press-fit wall 523 and the first press-fit wall 513 has an upwardly inclined surface and the other has a downwardly inclined surface, the two surfaces still form a single unit when joined. After the above complementation, optical glue can be further added, or laser fusion and other technologies can be used.

[0304] It can be understood that in some embodiments, the first wall 512 can be a plane, and the recessed wall 515 can be a spherical surface, an aspherical surface, or a free-form surface, etc., and the two are two different surfaces; in other embodiments, the first wall 512 can be a spherical surface, an aspherical surface, or a free-form surface, etc., and the recessed wall 515 can be a spherical surface, an aspherical surface, or a free-form surface, etc., and the first wall 512 and the recessed wall 515 can together constitute a continuous surface, and the first wall 512 and the recessed wall 515 can be designed by the same function, for example, generated by Zernike polynomials.

[0305] In some embodiments, the second wall 521 and the annular wall 522 can be planes, spherical, aspherical, or free-form surfaces, and can be two different surfaces. In other embodiments, the second wall 521 and the annular wall 522 together constitute a continuous surface, and the second surface 31 and the annular surface 32 can be designed using the same function in optical design, such as generated using Zernike polynomials. In some embodiments, the first wall 512 can be planes, spherical, aspherical, or free-form surfaces, and the recessed wall 515 can be spherical, aspherical, or free-form surfaces. The recessed wall 515 and the second wall 521 can have the same profile shape, such as a polygon, a circle, or an ellipse. The first wall 512 and the recessed wall 515 can be a continuous surface, such as designed using the same function, such as generated using Zernike polynomials. In other embodiments, the first wall 512 , the recessed wall 515 , the second wall 521 and the annular wall 522 may all be continuous surfaces designed by the same function, for example, generated by Zernike polynomials.

[0306] In some embodiments, referring to FIG. 63 , a plurality of third accommodating cavities 406 are further provided on the second mold 3000. Each third accommodating cavity 406 has the same transverse dimensions and is coaxial with the first accommodating cavity 402 and the second accommodating cavity 404. It will be appreciated that the third accommodating cavity 406 is provided in the corresponding second mold 3000. In some embodiments, the third accommodating cavity 406 may also be provided with a sidewall 33 to reduce the depth of the first accommodating cavity 402 and the second accommodating cavity 404 in a single mold, ensuring relatively low pressure when the molten material is injected, thereby facilitating sufficient adhesion of the molten light-transmitting material to the first surface 301 and the convex surface 302, the second surface 303, and the annular surface 304.

[0307] In some embodiments, referring to Figures 64-67, a gap D1 is defined between the first mold 2000 and the second mold 3000, and the molten light-transmitting material fills the gap to form a connecting layer 560. It will be appreciated that the gap D1 facilitates the connection of the formed first optical substrate 501 and the second optical substrate 502 into a whole via the connecting layer 560, facilitating batch transportation, clamping, or processing. A gap (or connecting layer 560) that is too thick will be detrimental to subsequent cutting, while a gap that is too thin will be detrimental to the stability of the overall structure. The thickness of the gap or connecting layer 560 can be between 100 and 500 microns, for example, 100 microns, 300 microns, 400 microns, or 500 microns.

[0308] In some embodiments, referring to Figures 66-67, a connecting layer 560 is provided along the entire circumference of each optical substrate to further stabilize the entire array. In some embodiments, the connecting layer 560 is provided at intervals along the circumference of each optical substrate to reduce the amount of light-transmitting material injected and reduce costs. In some embodiments, referring to Figure 68, after the light-transmitting material is cured, the optical substrate 50 is formed by coating the recessed wall 515 and the annular wall 522 with reflective layers 5111 and 5222 to form the first reflective window 2 and the second reflective window 4, respectively.

[0309] The reflective layer 5111 and the reflective layer 5222 may be a metal or metal alloy, such as silver, aluminum, aluminum-magnesium alloy, etc., and may be deposited using physical vapor deposition or chemical vapor deposition, such as mask coating, sputtering coating, or ion plating. It is understood that, since the recessed wall 515 and the annular wall 522 are formed on the same side of the mold in the present application, the reflective layer can be deposited on the recessed wall 515 and the annular wall 522 at one time to form the first reflective window 2 and the second reflective window 4 described in the above-mentioned embodiment of the optical module 10, without first coating one of the walls, then inverting the optical substrate, and then coating the other wall. This reduces the number of coating steps and effectively saves manufacturing costs.

[0310] In some embodiments, referring to FIG. 70 , after the reflective layer is plated on the recessed wall 515 and the annular wall 522 , the following steps are further included:

[0311] The microdisplay 700 is mounted on the second wall 521 of each second optical substrate 502, wherein the back panel 61 of the microdisplay 700 can be located on a side away from the second wall 521. The microdisplay 70 and the second wall 521 are closely attached, and the lateral dimension of the microdisplay 70 is less than or equal to the lateral dimension of the second wall 521. In other embodiments, the assembly of the microdisplay 700 can also be performed before coating.

[0312] The micro display 700 can be described with reference to the above-mentioned related embodiments and will not be described in detail here. The micro display 700 can be bonded to the second wall 521 using optical glue or the like, and the thickness of the optical glue layer can be small enough not to affect the optical performance.

[0313] In some embodiments, referring to FIG. 70 , the manufacturing method further includes: cutting the array substrate 500 in a direction perpendicular to the first wall 512 . After cutting, the connection structure between adjacent substrates can be separated into individual substrates 501 and 502 . It is understood that the cutting can be performed after demolding, after coating, or after the microdisplay 700 is assembled. The cutting method can be mechanical or laser cutting, etc. The cutting can be along the gap 550 between the first optical substrate 501 and the second optical substrate 502 . This gap can be formed by the first and second accommodating cavities 402 and 404 spaced apart. During the injection molding process, molten material does not enter between the first and second accommodating cavities 402 and 404 , maintaining the gap 550. This ensures that the sidewalls of the first and second optical substrates 501 and 502 are not affected. Furthermore, this gap facilitates clamping or positioning by a fixture, etc.

[0314] In some embodiments, referring again to FIG. 68 , the method of the present embodiment further includes providing a baffle 1550, comprising a collinearly arranged shielding area 1552, a first spacer 1554, and a second spacer 1556. The shielding area 1552 shields the first wall 512 and the second wall 521, preventing metal particles, for example, from passing through the shielding area 1552. The opening of the first spacer 1554 corresponds to the width of the annular wall 522, and the opening of the second spacer 1556 corresponds to the width of the annular wall 522 and the width of the recessed wall 515. The size of the second spacer 1556 can be larger than the first spacer 1554. The substrate can be fixed using a fixture 1011 or a positioning member, and a metal or metal alloy reflective layer can be plated on the annular wall 522 and the recessed wall 51 from the first spacer 1554 and the second spacer 1556. It can be understood that the above method does not require making a separate baffle for the first wall 512 and the recessed wall 511, and making a baffle for the second wall 521 and the annular wall 522. It only needs to provide an integral baffle (such as a mask, etc.) to achieve the reflective layer coating on both the first wall 512 and the second wall 521, which effectively reduces the cost of the baffle and the process of coating the reflective layer, thereby greatly reducing the cost.

[0315] In some embodiments, referring to Figures 71-73, the method of the embodiment of the present application also includes: providing a packaging sleeve 630, the sleeve 630 can be opaque; the sleeve 630 is provided with a first opening 632 and a second opening 634; the sleeve 630 can be made of black or other opaque materials, or the outer wall of the sleeve 630 is coated with a black material, such as black epoxy resin, black silicone rubber, carbon black, nickel black, black chrome or Vanta black coating or material, etc., the sleeve 630 can be cylindrical, the first opening 632 can be the end of the sleeve configured to accommodate the first optical matrix 501 and the second optical matrix 502, and the size of the first opening 632 can be greater than or equal to the lateral size of the first optical matrix 501 and the second optical matrix 502. The second opening 634 is smaller than the first opening 632. The second opening 634 can be located in the middle of the sleeve 630. The second opening 634 can be one or multiple openings spaced apart. When there is one second opening 634, the second opening 634 should preferably not occupy the entire circumference of the sleeve 630 to ensure mechanical support for the entire sleeve 630. In other embodiments, the sleeve 630 can be divided into a first sleeve and a second sleeve (not shown) disposed vertically. In this case, the second opening 634 is formed between the first and second sleeves. Alternatively, the sleeve 630 can be cylindrical and can further protect the first and second optical substrates 501, 502 therein. Place one of the first optical substrate 501 and the second optical substrate 502 into the sleeve 630 along the first opening 632; the placement of the first optical substrate 501 and the second optical substrate 502 may be related to the above-mentioned processes, such as the processes of coating the reflective layer and installing the microdisplay. If the coating of the reflective layer is completed first and the microdisplay 700 has not yet been installed, then any one of the first optical substrate 501 and the second optical substrate 502 may be placed into the sleeve 630. If the process of installing the microdisplay has been completed, then the second optical substrate 502 equipped with the microdisplay 700 may also be placed first, and then the first optical substrate 501 coated with the reflective layer may be placed.

[0316] An optical adhesive layer 710 is coated on the second pressing wall 523 or the first pressing wall 513 ; the optical adhesive layer 710 can be as thin as possible without affecting the light transmission efficiency after lamination.

[0317] The other one of the first optical substrate 501 and the second optical substrate 502 is placed into the sleeve 630 along the first opening 632, and the optical adhesive layer 710 is adjacent to the second opening 634. The term "adjacent" here can be understood as meaning that no matter which one of the first optical substrate 501 and the second optical substrate 502 is placed first, the entire sidewalls of the first optical substrate 501 and the second optical substrate 502 will not completely cover the second opening 634. It can be understood that the end surfaces of the first optical substrate 501 and the second optical substrate 502 can be connected to the second opening 634 so that when the optical adhesive layer 710 is added later, excess optical adhesive layer 710 overflows through the second opening 634.

[0318] The second pressing wall 523, optical adhesive layer 710 and first pressing wall 513 are attached, and the excess optical adhesive layer 710 overflows through the second opening 634. This step further presses the first optical substrate 501 and the second optical substrate 502 tightly together, for example, reducing the presence of different transmission medium layers such as air.

[0319] It can be understood that the first optical substrate 501 coated with a reflective layer can be placed in the sleeve 630 first, and then the first optical substrate 501 and the second optical substrate 502 can be bonded together using the optical adhesive layer 710; in some embodiments, the second optical substrate 54 equipped with the micro display 700 can be placed in the sleeve 630 first, at which time the entire height of the second optical substrate 54 may not be completely higher than the second opening 634, and then the optical adhesive layer 710 is coated on the end face of the second optical substrate 54 facing away from the micro display 700, or the optical adhesive layer 710 is coated on the end face of the first optical substrate 501 facing away from the first wall 512. In other embodiments, glue can also be coated on both to form the optical adhesive layer 710.

[0320] In some embodiments, the sleeve 630 also includes a wiring hole, which can be located at a position of the sleeve 630 corresponding to the microdisplay 700, such as the bottom wall or side wall of the sleeve 630. The wiring hole can connect the electrical leads of the microdisplay 700 to other electrical components, such as a driving board or a battery.

[0321] In some embodiments, the manufacturing method of the present application also includes: placing the second optical substrate 502 equipped with the microdisplay 700 into the sleeve 630 along the first opening 632, and the microdisplay 700 is at least partially exposed relative to the wiring hole, so as to ensure that the microdisplay 700 can be electrically connected to external electrical components, such as a control board or battery, etc.; coating the second pressing wall 523 or the first pressing wall 513 with an optical adhesive layer 710; placing the first pressing wall 513 of the first optical substrate 501 into the sleeve 630 along the first opening 632; and bonding the second pressing wall 523, the optical adhesive layer 710 and the first pressing wall 513, and the excess optical adhesive layer 710 overflows through the second opening 634.

[0322] It can be understood that the sleeve 630 can be used to package the first optical matrix 501 and the second optical matrix 502, and the micro display 700 and the like can also be packaged together, so that the whole becomes a more complete module, which is conducive to subsequent applications, such as transportation, assembly with other devices (such as glasses, head-mounted devices), etc.

[0323] In some embodiments, referring to FIG. 63 , the method of the embodiment of the present application further includes:

[0324] A light-transmitting layer 740 is provided; it can be overlaid on the sleeve 630 and can be made of PMMA (polymethyl methacrylate), PC (polycarbonate) plastic, or resin glass. The light-transmitting layer 740 is overlaid on the first wall 512 and the recessed wall 515, and its dimensions are equal to or greater than those of the first wall 52. The light-transmitting layer 740 does not alter the original light propagation path and protects the first wall 512 and the recessed wall 515, reducing wear and tear and preventing dust and other debris from entering and affecting their optical efficiency. In some embodiments, the dimensions of the light-transmitting layer 740 can be the same as those of the opaque encapsulation material 90, providing a more regular overall structure and facilitating subsequent assembly. In some embodiments, the microdisplay 700 may further include components such as a backplane, which can be connected to the relevant electrical components via wires or flexible cables through the wiring holes described in the above embodiments.

[0325] The present application also provides an embodiment of a near-eye display module, which is manufactured by the above-mentioned manufacturing method. The near-eye display module as a whole can be cylindrical or prismatic. The entire size can be between 0.5 cubic millimeters and 5 cubic centimeters, such as 0.5 cubic millimeters, 1 cubic millimeter, 8 cubic millimeters, 1 cubic centimeter, 2 cubic centimeters, 5 cubic centimeters, etc. Its size is relatively small to the naked eye, and it is relatively easy to integrate into various other devices without affecting the appearance or large-area structure of the original device. For example, the near-eye display module can be used in myopia glasses, hyperopia glasses, sunglasses, goggles, smart glasses or other head-mounted devices, etc., and has a good adaptation space.

[0326] The present application provides a method for manufacturing a near-eye display module, wherein: a first mold is provided, the first mold includes a first accommodating cavity and a second accommodating cavity arranged at intervals, the inner wall of the first accommodating cavity is provided with a first surface and a convex surface, the first surface is arranged around the convex surface, and the second accommodating cavity is provided with a second surface and an annular surface, the annular surface is arranged around the second surface; a second mold is provided, the second mold is located on the side of the first mold facing the first accommodating cavity and the second accommodating cavity; molten light-transmitting material is injected between the first mold and the second mold to fill the first accommodating cavity and the second accommodating cavity; the first mold and the second mold are pressed together so that the molten light-transmitting material is fully adhered to the first surface and the convex surface, the second surface and the annular surface; after the molten light-transmitting material is cooled and solidified, the first mold and the second mold are demolded to obtain a first optical matrix and a second optical matrix formed after the molten light-transmitting material is solidified, wherein the structure of the first optical matrix corresponds to the first surface and the convex surface, and the structure of the second optical matrix corresponds to the second surface and the annular surface.

[0327] The near-eye display module manufacturing method of the present application can be adopted to set different planes on the same side of the mold to form walls of different designs after injection molding, and can be coated with a reflective layer at one time, thereby reducing the number of molds and baffles for coating reflective layers, further reducing the process of separately coating two different walls with reflective layers, and greatly reducing production and preparation costs.

[0328] With reference to Figures 35-37, 62-63 and 74, the present application also provides a mold for making an optical module, which includes a main body 800, which may include a combination of one or more molds. The main body 800 is formed with accommodating cavities 40, 402, 404, 406. The accommodating cavities 40, 402, 404, 406 can be an integral inner cavity or a combination of multiple small accommodating cavities arranged in an array. When there are multiple accommodating cavities 40, they can have a uniform size or different sizes. At this time, they can form a regular size arrangement, for example, the size along a certain direction increases sequentially or at intervals. A first surface 22, 301 and a raised surface 21, 302 are provided at the position corresponding to the accommodating cavity 40. The raised surface 21 is raised relative to the first surface 22 and is arranged at the center of the first surface 22. A second surface 31, 303 and annular surfaces 32, 304 are also provided at the position corresponding to the accommodating cavity 40; they are arranged around the second surface 31 and are not coplanar with the second surface 31. It can be understood that the first surface 22 and the second surface 31 can be surfaces that appear flat or approximately flat to the naked eye. Of course, their surfaces can have a certain degree of roughness that is not obviously visible to the naked eye. The position of the corresponding accommodating cavity 40 mentioned above can be understood as a sealed cavity or a cavity with a gap, such as a complete cavity formed by the mold after pressing together, and can also be understood as a cavity with a gap formed by pressing together two or three molds. For example, in one embodiment, it includes two upper and lower molds, the upper mold is roughly plate-shaped, and the lower mold is provided with an accommodating cavity. In this case, although the upper mold is not directly inside the accommodating cavity, the upper mold is a part that cooperates with each other during the pressing process of the upper and lower molds after injecting molten light-transmitting material. At this time, the vertical projection area of ​​the accommodating cavity of the upper mold corresponding to the lower mold should also be understood as the corresponding position of the accommodating cavity 40. That is, as long as the vertical projection area of ​​the accommodating cavity 40 can cover the area of ​​the mold, it can be understood as the corresponding position of the accommodating cavity 40. It can be understood that when no molten material is injected, the area directly facing the accommodating cavity 40 but not on the inner wall or inner side of the accommodating cavity 40 should also be understood as the corresponding position of the accommodating cavity 40. Among them, the first mold 2000 and the first mold 20, the second mold 3000 and the second mold 30, the first surface 22 and the first surface 301, the convex surface 21 and the convex surface 302, the second surface 31 and the second surface 303, the annular surface 32 and the annular surface 304, the accommodating cavities 40, 402, 404, and 406 can be understood as the same. For the convenience of description, the description of the following embodiments will only use one set of labels. The different labels in other drawings should be understood the same without violating the overall technical concept.

[0329] In some embodiments, the size of the accommodating cavity 40 can be between 0.4 cubic millimeters and 4 cubic centimeters, such as 0.4 cubic millimeters, 1 cubic millimeter, 8 cubic millimeters, 1 cubic centimeter, 2 cubic centimeters, 4 cubic centimeters, etc. The space is so small that the size of the single main body 50 finally formed appears relatively small to the naked eye, and it is relatively easy to integrate into various other devices without affecting the appearance or large-area structure of the original device, such as glasses or other head-mounted devices, etc., and has a good adaptation space.

[0330] Among them, the first surface 22 and the second surface 31 are arranged parallel to each other or collinearly. For example, the first surface 22 and the second surface are on the same side with different height differences, that is, they are parallel. If their height differences are the same, they are collinear. The first surface 22 and the second surface are on the same side or on different sides. The first surface 22 and the convex surface 21 are a group at the first end, and the second surface 31 and the annular surface 32 are a group at the second end. The first end and the second end are parallel, or the first surface 22 and the convex surface 21, the second surface 31 and the annular surface 32 are all on the same end.

[0331] In this case, they can be arranged in parallel. The convex surface 21 and the annular surface 32 include any one or a combination of inclined surfaces, spherical surfaces, aspherical surfaces, or free-form surfaces, wherein the accommodating cavity 40 is configured to be injected with a molten light-transmitting material, which adheres to the first surface 22 and the convex surface 21, the second surface 31, and the annular surface 32 and solidifies to form the optical module 10. The molten light-transmitting material can be any one of polymethyl methacrylate, polycarbonate, plastic, resin, or glass, and can optionally be a transparent molten material.

[0332] The present invention injects molten material between the cavities, allowing the molten material to adhere to the correspondingly designed first surface 22 and raised surface 21, second surface 31 and annular surface 32, and finally solidify into a shape. This eliminates the need for thicker translucent or transparent materials similar to those used in cutting processes, reducing material loss during cutting, thereby lowering costs and also reducing the effects of cutting on optical surfaces, such as wear. In some embodiments, the size of a single cavities 40 corresponding to the positions of the first surface 22 and raised surface 21, second surface 31 and annular surface 32 can be between 1 cubic millimeter and 3 cubic centimeters. This results in an optical module 10 that appears small to the naked eye.

[0333] In some embodiments, referring to Figures 35-37, 62-63, and 74, the accommodating cavities 40 may include a plurality of cavities arranged in a line or in an array, wherein the lateral dimension of the first surface 22 corresponding to each accommodating cavity 40 is equal to the lateral dimension of the annular surface 32, and the lateral dimension of the convex surface 21 may be equal to or smaller than the lateral dimension of the second surface 31. In some embodiments, the accommodating cavities 40 may include a plurality of cavities arranged in a line or in an array, wherein the lateral dimension of the first surface 22 corresponding to each accommodating cavity 40 is equal to the lateral dimension of the annular surface 32 and gradually increases along the first direction. For example, a plurality of accommodating cavities 40 arranged in a line or in an array may have a uniform size for each accommodating cavity 40, but another number of accommodating cavities 40 may have different sizes, for example, increasing or decreasing from left to right, thereby enabling the production of optical arrays of different sizes at one time to meet different design requirements.

[0334] In some embodiments, referring to Figures 35-37 and 74, a body 800 includes a first mold 20, a first surface 22 and a raised surface 21 disposed on the first mold 20, a second mold 30 spaced apart from the first mold 20 and configured to be pressed against the first mold 20, a second surface 31 and an annular surface 32 disposed on the second mold 30, the first mold 20 and the second mold 30 being aligned, the raised surface 21 and the second surface 31 being coaxially aligned, and a first sidewall 33 disposed around the first mold 20 and / or the second mold 30 to form a receiving cavity 40. It is understood that the first sidewall 33 may be disposed on only one of the first mold 20 and the second mold 30, or may be disposed on both molds. The first sidewall 33 may be integrally formed with the first mold 20 and the second mold 30, or may be a separate design from the first mold 20 and the second mold 30. It is understood that the first sidewall 33 is a surrounding design to form a groove to accommodate the molten light-transmitting material. As shown in FIG1 , the accommodating cavity 40 is formed as a whole, but corresponding design surfaces are still formed at corresponding positions. At this time, an integral optical module is formed after molding. As long as the positions of the design surfaces are pre-set and controlled, the optical module array after demolding can find the accurate preset position during cutting to achieve the separation of individual optical modules.

[0335] In some embodiments, referring to Figures 35-37 , the mold body 800 further includes a plurality of second sidewalls 34 . The plurality of second sidewalls 34 can be part of the first mold 20 or the second mold 30 , or can be independent components attached to the first mold 20 or the second mold 30 . The height of the second sidewalls 34 is the same as the height of the first sidewalls 33 . The second sidewalls 34 are disposed in the first mold 20 and / or the second mold 30 and are located between the first sidewalls 33 . The plurality of second sidewalls 34 are spaced apart to separate the accommodating cavities 40 . It will be appreciated that the second sidewalls 34 can block the entry of molten light-transmitting material, thereby providing gaps 17 ( FIG. 10 ) between the arrayed accommodating cavities 40 after solidification of the molten material. For example, in the optical module array shown in FIG. 10 , this allows for quick identification of the separation position, facilitating subsequent cutting of the optical module array. Furthermore, these gaps 17 facilitate clamping or positioning with a fixture or the like.

[0336] In some embodiments, referring to Figures 35-39, after the first mold 20 and the second mold 30 are pressed together, there is a gap D2 between the highest end surface of the first mold 20 and the highest end surface of the second mold 30, and the cross-section in the direction perpendicular to the gap line is not flush with the annular surface 32, and the gap distance meets the preset value. The highest end face here can be regarded as the mold as a whole, that is, the highest end face formed as a whole is used as a reference. For example, when the first side wall 33 and the second side wall 34 involved in the following embodiment are located on the mold, it can be understood that the side wall and the mold are a whole, and the corresponding side wall is the highest, which is the highest end face. The gap D2 can be about 500 microns, so that the optical module array formed subsequently is a whole, which is convenient for subsequent processing, such as batch clamping, transportation, cutting, etc. It can be understood that, as shown in Figure 38, after the molten material is injected into the first mold 20 and the second mold 30, there is a gap D1 between the first mold 20 and the second mold 30. In order to ensure that the material and the design surface are fully fitted, they can be pressurized in a step, such as further pressing the first mold 20 and the second mold 30, so that there is a shorter gap D2 between the first mold 20 and the second mold 30. At this time, the excess molten material in the pressing process (pressing from D1 to D2) can overflow from the gap D1 or D2. Optionally, since the annular surface 32 is outside the second surface 31 and is not a regular vertical surface, in order to ensure that the annular surface 32 can still maintain any one or combination of the intended design of inclined surface, spherical surface, aspherical surface or free-form surface during the pressing process, that is, to reduce the deformation of the annular surface 32 caused by the overflow process being too close to the gap, it is necessary to ensure that the gap opening is as far away from the annular surface 32 as possible, that is, to ensure that the cross-section in the direction of the vertical gap connection line is not flush with the annular surface 32, for example, higher or lower than the position of the gap D1 or D2, which is conducive to maintaining the formation of the reference plane of the annular surface. In some embodiments, the gap D2 may also not exist. In this case, the optical module 10 after demolding is a single independent existence, rather than an array connected together as a whole. This is conducive to facilitating personalized design in subsequent processes.

[0337] In some embodiments, referring to FIG. 35 , the second mold 30 is provided with a first sidewall 33 and multiple second sidewalls 34 to form multiple accommodating cavities 40. The second surface 31 and the annular surface 32 are located on the inner walls of the accommodating cavities 40. The first mold 20 is provided with a first surface 22 and a raised surface 21 in the vertical projection area corresponding to the accommodating cavities 40. It will be understood that only the accommodating cavities 40 are formed in the second mold 30. This time, a gap D2 is formed between the end surfaces of the first and second sidewalls 33 and 34 and the first surface 22 of the first mold 20 after lamination. In this case, the distance between the first surface 22 and the second surface 31 is the thickness of the optical module. Therefore, only the height of the first sidewall 33 or the second sidewall 34 of one mold needs to be controlled, and then lamination can be performed using the other mold containing the raised surface 21. Furthermore, the location of the gap for glue overflow is the farthest from the annular surface 32, which facilitates the formation of a reference surface for the annular surface 32. Since the first surface 22 is a flat surface, the effect of glue overflow on it during lamination can be ignored.

[0338] In some embodiments, referring to FIG. 37 , a first mold 20 is provided with a first sidewall 33 and multiple second sidewalls 34 to form multiple accommodating cavities 40. The first surface 22 and the raised surface 21 are located on the inner walls of the accommodating cavities 40. The second mold 30 is provided with a second surface 31 and an annular surface 32 in the vertical projection area corresponding to the accommodating cavities 40. Unlike the embodiment shown in FIG. 2 , this embodiment reverses the order of the first sidewall 33 and the multiple second sidewalls 34. The sidewalls are provided on the simpler first mold 20, which is composed of only the first surface 22 and the raised surface 21, thus simplifying the mold design workload.

[0339] In some embodiments, referring to FIG36 , a first mold 20 is provided with a first sidewall 33 and multiple second sidewalls 34 to form multiple first accommodating cavities 40 . The first surface 22 and the raised surface 21 are located on the inner wall of the first accommodating cavities 40 . The second mold 30 is provided with a first sidewall 33 and multiple second sidewalls 34 to form multiple second accommodating cavities 40 . The second surface 31 and the annular surface 32 are located on the inner wall of the second accommodating cavities 40 . The first accommodating cavities 40 and the second accommodating cavities 40 are arranged vertically to form the accommodating cavities 40 . The first surface 22 and the raised surface 21 , and the second surface 31 and the annular surface 32 are located on different sides of the mold. Unlike the embodiments of FIG35 and FIG37 , the present application provides both the first sidewall 33 and multiple second sidewalls 34 on the first mold 20 and the second mold 30 . The first accommodating cavities 41 and the second accommodating cavities 42 can have the same height, thereby making the two molds have the same height, which is beneficial for early mold design. Furthermore, the height relationship between the sidewalls of the first mold 20 and the second mold 30 can be flexibly designed, making the overall design more flexible. In some embodiments, the first and second accommodating cavities 41, 42 may have different heights, as long as their combined height meets the desired thickness requirements for the optical module. Compared to designing the accommodating cavity 40 on only one side, providing accommodating cavities on both sides can appropriately reduce the height of the accommodating cavity designed on only one mold, thereby facilitating the injection of molten light-transmitting material.

[0340] In some embodiments, referring to Figures 62 and 63, the body 800 includes a first mold 2000; a second mold 3000 is configured to be pressed against the first mold 2000. The first mold 2000 is provided with a receiving cavity 40, wherein the receiving cavity 40 includes at least one third receiving cavity 402 and a fourth receiving cavity 404. For example, the third receiving cavity 402 and the fourth receiving cavity 404 are arranged alternately. Of course, a combination of multiple third receiving cavities 402 and multiple fourth receiving cavities 404 can also be arranged sequentially. The first surface 301 and the raised surface 302 are disposed in the third receiving cavity 402, and the second surface 303 and the annular surface 304 are disposed in the fourth receiving cavity 404. The first surface 301 and the raised surface 302, and the second surface 303 and the annular surface 304 are located on one side of the same mold. It can be understood that by injecting molten material and then pressing the mold, the first surface 301 and the raised surface 302, the second surface 303 and the annular surface 304 will simultaneously form walls of corresponding shapes. At this time, in subsequent processes, such as coating, they can be operated together, reducing the operating steps of subsequent processes of the optical module, improving production efficiency and reducing costs.

[0341] In some embodiments, referring to FIG. 62 , the first mold 2000 is provided with a first sidewall 33 and multiple second sidewalls 34 of equal height to form a third cavity 402 and a second cavity 404 arranged along a first direction. The first surface 301 and the raised surface 302 are located on the inner wall of the third cavity 402, while the second surface 303 and the annular surface 304 are located on the inner wall of the fourth cavity 404. The first mold 20 is flat, significantly simplifying mold design time and costs. The third cavity 402 and the second cavity 404 can be of the same height to ensure consistent pressure during injection of the molten material and uniform distribution of the molten light-transmitting material. In other embodiments, the third cavity 402 and the second cavity 404 can have different heights, depending on the difficulty of the molten material conforming to their respective design surfaces. For example, if the annular surface 304 requires greater pressure to conform, the corresponding fourth cavity 404 can be made relatively deeper.

[0342] In some embodiments, referring to Figure 63, the first mold 2000 is provided with a first side wall 33 and multiple second side walls 34 to form a third accommodating cavity 402 and a fourth accommodating cavity 404 arranged along the first direction, the first surface 301 and the convex surface 302 are located on the inner wall of the third accommodating cavity 402, the second surface 303 and the annular surface 304 are located on the inner wall of the fourth accommodating cavity 404, and the second mold 3000 is provided with a first side wall 33 and multiple second side walls 34 to form a fifth accommodating cavity 406 arranged along the first direction, each fifth accommodating cavity 406 is aligned with each third accommodating cavity 402 and has the same lateral size, and each fifth accommodating cavity 406 is aligned with each fourth accommodating cavity 404 and has the same lateral size. Different from the embodiment of Figure 62, this embodiment can further form a fifth accommodating cavity 406 on the second mold 3000, so that the height of the first side wall 33 and the second side wall 34 of the first mold 2000 can be reduced, and the weight of the first mold 2000 can be reduced. In addition, the position of the overflow port can be controlled in the middle position to facilitate the fitting of the molten material and their respective corresponding surfaces.

[0343] In some embodiments, as shown in Figures 39-40, the gap D2 after lamination can be between 100 and 500 microns. It is understood that if the gap is too thin, it will be difficult to ensure the overall structural strength of the optical module array, while if it is too thick, it will make it difficult to mechanically separate the optical module array. It is understood that the type and shape of the relevant mold surfaces or walls can be referred to the description of the relevant embodiments above and will not be repeated here.

[0344] The present application provides a mold for making an optical module, which is used in a near-eye display device, wherein: a body, the body is formed with a receiving cavity; a first surface and a convex surface are provided corresponding to the position of the receiving cavity, the convex surface is convex relative to the first surface, and the convex surface is set at the center of the first surface; a second surface and an annular surface are also provided corresponding to the position of the receiving cavity, the annular surface is arranged around the second surface and is not coplanar with the second surface, wherein the first surface and the second surface are parallel to each other or arranged in a collinear manner, the convex surface and the annular surface include any one or combination of inclined surfaces, spherical surfaces, aspherical surfaces or free-form surfaces, wherein the receiving cavity is configured to inject molten light-transmitting material, the molten light-transmitting material adheres to the first surface and the convex surface, the second surface and the annular surface and solidifies to form an optical module. The mold for making an optical module of the embodiment of the present application can directly inject molten material between the receiving cavities of the mold body, so that the molten material adheres to the corresponding design surface, and finally solidifies and forms it, without the need for thicker light-transmitting or transparent materials, reducing the loss of material cutting, and thus lowering the cost.

[0345] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An optical module, applied to a near-eye display module, wherein: include: a first reflective window configured to allow reflection of light; a second reflecting window, arranged at an interval at an opposite end of the first reflecting window, the second reflecting window facing the first reflecting window, and the second reflecting window configured to receive light reflected from the first reflecting window; an incident window, disposed at the center of the second reflecting window and aligned with the first reflecting window, the incident window being configured to allow light to be incident into a space formed by the first reflecting window and the second reflecting window; as well as an exit window surrounding the first reflective window, the exit window being arranged opposite to the second reflective window, and the exit window being configured to allow light to be emitted from a space formed by the first reflective window and the second reflective window; The incident window is used to install a micro display, and the light of the micro display is incident from the incident window to the first reflective window, reflected from the first reflective window to the second reflective window, and then emitted through the exit window to form a projected image.

2. The optical module according to claim 1, wherein: The first reflective window is any one of an inclined surface, a spherical surface, an aspherical surface or a free-form surface; the second reflective window is any one of an inclined surface, a spherical surface, an aspherical surface or a free-form surface, and the first reflective window and the second reflective window are respectively provided with a metal reflective layer, and the metal reflective layer is configured to allow reflection of light.

3. The optical module according to claim 2, wherein: The optical module also includes a side wall, one end of the side wall is connected to the exit window, and the other end of the side wall opposite to the second reflective window is connected, wherein the area enclosed by the first reflective window, the exit window, the side wall, the second reflective window, and the incident window is a solid uniform light-transmitting medium, and the reflective layers of the first reflective window and the second reflective window are arranged on the side away from the solid light-transmitting medium.

4. The optical module according to claim 2, wherein: The optical module also includes a side wall, one end of the side wall is connected to the exit window, and the other end of the side wall is connected to the second reflective window, wherein the area enclosed by the first reflective window, the exit window, the side wall, the second reflective window, and the incident window is hollow, the reflective layer of the first reflective window is coated on the side facing the hollow area, and the reflective layer of the second reflective window is arranged on the side facing or away from the hollow area.

5. The optical module according to claim 3, wherein: The lateral dimension of the first reflective window is greater than or equal to the lateral dimension of the incident window, the centers of the first reflective window and the incident window are aligned, the lateral dimension of the first reflective window is greater than or equal to the lateral dimension of the microdisplay, and the dimensions enclosed by the first reflective window, the exit window, the side wall, the second reflective window, and the incident window are between 1 cubic millimeter and 1 cubic centimeter.

6. The optical module according to claim 3, wherein: The optical module also includes a first non-transmissive layer that does not allow light to pass through, the first non-transmissive layer covers the side wall, the first non-transmissive layer is flush with the second reflective window and the exit window, and allows the incident window and the exit window to leak relative to the first non-transmissive layer, and the lateral dimension of the exit window is equal to the lateral dimension of the second reflective window; wherein the first non-transmissive layer includes one of black epoxy resin, black silicone rubber, carbon black, nickel black, black chrome or Vanta black coating.

7. A near-eye display module, wherein: The near-eye display module comprises a microdisplay and an optical module as claimed in any one of claims 1 to 6, wherein the microdisplay is arranged at an incident window of the optical module.

8. The near-eye display module according to claim 7, wherein: The microdisplay further comprises a back plate, the back plate being located on a side of the microdisplay away from the incident window and being electrically connected to the microdisplay, the back plate being used to connect to a driving power source.

9. The near-eye display module according to claim 7, wherein: The near-eye display module further includes a light-transmitting layer, which is arranged on the end surface of the exit window, and covers the exit window and the first reflective window; The overall size of the first reflective window, the second reflective window, the incident window, the exit window, the side wall, the microdisplay and the light-transmitting layer is between 0.5 cubic millimeters and 5 cubic centimeters.

10. The near-eye display module according to claim 7, wherein: The microdisplay has a resolution of no less than 2 arc minutes per pixel of the wearer's field of view, and a pixel-to-pixel pitch of no more than 5 microns; the projected image of the microdisplay covers at least an 8° field of view of the wearer, and a magnification of the projected image is no less than 2.

5.

11. The near-eye display module according to claim 7, wherein: The near-eye display module also includes a first shell, the first shell is provided with a first connecting portion, the optical module is provided with a second connecting portion, the second connecting portion is integrally formed with the optical module, and the first connecting portion and the second connecting portion cooperate with each other to adjust the distance between the micro display and the incident window.

12. The near-eye display module according to claim 11, wherein: The near-eye display module also includes a flexible part, the material hardness of the flexible part is respectively smaller than the material hardness of the first shell and the material hardness of the optical module, the first shell is provided with a mounting hole, the flexible part is arranged around the optical module, the flexible part is clamped between the inner wall of the mounting hole and the optical module, the optical module and the inner wall of the mounting hole are tightly fitted to each other and at least partially deform the flexible part in the circumferential direction and the axial direction.

13. The near-eye display module according to claim 12, wherein: The first shell includes a front cover and a rear cover, a mounting groove is formed between the front cover and the rear cover, the front cover is provided with the mounting hole, the mounting groove is connected to the mounting hole, and the micro display is at least partially located in the mounting groove.

14. A near-eye display device, wherein: The near-eye display device includes a second shell and a near-eye display module as described in claim 7 arranged in the second shell.

15. A method for manufacturing a near-eye display module, for manufacturing the near-eye display module according to claim 7, wherein: include: providing a first mold; Providing a second mold, wherein the first mold and the second mold include a plurality of convex surfaces, a plurality of first surfaces, a plurality of second surfaces, and a plurality of annular surfaces; injecting molten light-transmitting material between the first mold and the second mold; Pressing the first mold and the second mold together so that the molten light-transmitting material is fully attached to the convex surface, the first surface, the second surface and the annular surface; Demolding the first mold and the second mold to obtain a substrate formed after the light-transmitting material is cured, wherein the substrate comprises: a concave wall complementary to the shape of the convex surface, a first wall surrounding the concave wall, and the substrate further comprises an annular wall complementary to the annular surface, and a second wall surrounded by the annular wall; The recessed wall and the ring wall are plated with a reflective layer to form a first reflective window and a second reflective window respectively, while the first wall and the second wall are not plated with a reflective layer to form an exit window and an incident window respectively.

16. The method for manufacturing a near-eye display module according to claim 15, wherein: The method further includes installing a microdisplay corresponding to the incident window, cutting a connection structure between two adjacent substrates to separate them into individual substrates, and packaging the individual substrates to expose the exit window, wherein the packaging material is light-proof.

17. The method for manufacturing a near-eye display module according to claim 15, further comprising cutting a connection structure between two adjacent substrates to separate the substrate into a first substrate and a second substrate, A packaging sleeve is provided, wherein the sleeve is made of a light-proof material; the sleeve is provided with a first opening and a second opening; Putting the first substrate and the second substrate into a sleeve along the first opening and bonding them with an optical adhesive layer; Pressing the first substrate and the second substrate together and allowing the excess optical adhesive layer to overflow from the second opening; in, The method further comprises: placing a microdisplay into a sleeve, wherein the sleeve has a wiring hole, wherein at least a portion of the microdisplay is exposed relative to the wiring hole, and installing the microdisplay in the sleeve to correspond to the incident window; 18. The method for manufacturing a near-eye display module according to claim 15, wherein: The method further comprises: Providing a light-transmitting layer, wherein the size of the light-transmitting layer is greater than or equal to the size of the exit window; The light-transmitting layer is covered on the first reflecting window and the exiting window.

19. The method for manufacturing a near-eye display module according to claim 15, wherein: Before demolding the first mold and the second mold, the method further includes determining whether the temperature of the light-transmitting material is below the solidification point, and if so, demolding is performed; if not, controlling the temperature of the light-transmitting material to be below the solidification point.

20. The method for manufacturing a near-eye display module according to claim 15, wherein: The first mold provided and the second mold provided respectively include a plurality of convex surfaces and a plurality of annular surfaces arranged in an array; or One of the first mold and the second mold includes a plurality of convex surfaces and a plurality of annular surfaces arranged in an array; The convex surface and the annular surface include any one or a combination of an inclined surface, a spherical surface, an aspherical surface or a free-form surface.

Images