Optical display module, assembling method and display device
By using photochromic materials in the optical display module design, the problem of low light source and bracket fixing efficiency was solved, achieving efficient assembly and high-precision light transmission, reducing light leakage, and improving optical path optimization and signal stability.
Patent Information
- Application Number
- CN202511324020.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-16
- Publication Date
- 2025-10-31
AI Technical Summary
The current optical display module has low efficiency in fixing the light source and the bracket, resulting in low assembly efficiency.
The optical display module design includes an optical waveguide, mounting components, a light engine, and a fixing adhesive layer. Utilizing the photochromic properties of the color-changing material, the mounting components are switched from a light-transmitting state to a light-blocking state by light irradiation during the assembly process, thus fixing the light engine and mounting components and ensuring the light transmission accuracy and assembly efficiency of the light engine.
It improves the assembly efficiency of optical display modules and the light transmission accuracy of optical engines, reduces the possibility of light leakage, and enhances the optimization of optical paths and the stability of optical signals.
Smart Images
Figure CN120871441A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of augmented reality technology, and more specifically, to optical display modules, assembly methods, and display devices. Background Technology
[0002] Some related optical display modules include a light source and an optical waveguide, with the light source mounted on the waveguide via a bracket. To ensure the reliability of light transmission from the light source, the bracket serves to prevent light leakage. However, this results in low fixing efficiency between the light source and the bracket. Consequently, these optical display modules suffer from low assembly efficiency. Summary of the Invention
[0003] This application provides an optical display module, an assembly method, and a display device to solve the technical problem of low assembly efficiency in optical display modules of related technologies.
[0004] The embodiments of this application are implemented as follows: In a first aspect, this application provides an optical display module, including an optical waveguide, a mounting component, an optical engine, and a fixing adhesive layer. The optical waveguide has a light-receiving surface. The mounting component is disposed on the light-receiving surface and has a through hole communicating with the light-receiving surface. The optical engine has a light-emitting end with a light-emitting surface extending into the through hole, and the light-emitting surface corresponds to the light-receiving surface. The fixing adhesive layer is disposed between the light-emitting end and the through hole, and is configured to cure upon irradiation to fix the optical engine and the mounting component. The mounting component has a light-shielding portion that at least covers the portion of the through hole that does not overlap with the light-emitting end, and the light-shielding portion includes a color-changing material.
[0005] In one possible implementation: The color-changing material includes a photochromic material, which has a light-transmitting state and a light-blocking state, and is configured to switch from the light-transmitting state to the light-blocking state after being irradiated with light of a preset wavelength.
[0006] In one possible implementation: The photochromic material includes a photosensitizer and a color-changing precursor; the photosensitizer is configured to switch to an excited state after being irradiated with light of a preset wavelength; the photosensitizer in the excited state is used to drive the color-changing precursor to produce an irreversible reaction and generate colored particles, so that the light-shielding part switches to the light-shielding state.
[0007] In one possible implementation: The light-shielding portion is disposed on the outer surface of the mounting member; and / or, the light-shielding portion is distributed between the inner and outer surfaces of the mounting member.
[0008] In one possible implementation: The mounting component has a first surface and a second surface, the first surface corresponding to the optical waveguide, and the second surface located on the outside of the mounting component away from the optical waveguide; the light-shielding portion includes a first light-shielding layer and a second light-shielding layer, the first light-shielding layer including a first photochromic material, and the second light-shielding layer including a second photochromic material; the first surface and the hole surface of the through hole are provided with the first light-shielding layer, and the second surface is provided with the second light-shielding layer.
[0009] In one possible implementation: The optical display module also includes two barrier layers; the light-incoming surface is provided with one barrier layer, the surface of the optical waveguide facing away from the light-incoming surface is provided with another barrier layer, and one end of the fixing adhesive layer extends to the barrier layer on one side of the light-incoming surface.
[0010] Secondly, this application provides an assembly method for an optical display module, using the aforementioned optical display module. The method includes: providing an optical waveguide, a mounting component, an optical engine, and a fixing adhesive, wherein the mounting component has a light-transmitting state and a light-shielding state; placing the mounting component in the light-transmitting state onto the optical waveguide; mounting the optical engine into a through hole of the mounting component; placing the fixing adhesive between the optical engine and the hole surface of the through hole; curing the fixing adhesive by irradiating it with light to form a fixing adhesive layer, thereby fixing the optical engine and the mounting component together; and switching the state of the mounting component to the light-shielding state.
[0011] In one possible implementation: The color-changing material of the mounting component includes a photochromic material, and the step of switching the state of the mounting component to the light-blocking state includes: irradiating the mounting component with light at a preset wavelength to switch the mounting component from the light-transmitting state to the light-blocking state.
[0012] In one possible implementation: The mounting component has a first surface and a second surface, the first surface corresponding to the optical waveguide, and the second surface located on the outer side of the mounting component away from the optical waveguide; the light-shielding portion includes a first light-shielding layer and a second light-shielding layer, the first light-shielding layer including a first photochromic material, and the second light-shielding layer including a second photochromic material; the first surface and the hole surface of the through hole are provided with the first light-shielding layer, and the second surface is provided with the second light-shielding layer; the step of irradiating the mounting component with light at a preset wavelength to switch the mounting component from the light-transmitting state to the light-shielding state includes: firstly, irradiating the hole surface of the through hole with light emitted by the light engine, and irradiating the gap between the first surface and the light-incoming surface, thereby irradiating all the first light-shielding layers, so that the first light-shielding layers switch to the light-shielding state; then irradiating the second light-shielding layer with an external light source, so that the second light-shielding layer switches to the light-shielding state.
[0013] Thirdly, this application provides a display device, including a frame and an optical display module. The optical display module is disposed on the frame. The optical display module is the aforementioned optical display module, or the optical display module is an optical display module assembled using the aforementioned optical display module assembly method. Attached Figure Description
[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is a schematic diagram of the structure of an optical display module according to an embodiment of this application.
[0016] Figure 2 This is a cross-sectional view of an optical display module according to an embodiment of this application.
[0017] Figure 3 This is a cross-sectional view of an optical display module according to another embodiment of this application.
[0018] Figure 4 This is a cross-sectional view of an optical display module according to another embodiment of this application.
[0019] Figure 5 This is a cross-sectional view of an optical display module according to another embodiment of this application.
[0020] Figure 6 This is a cross-sectional view of an optical display module according to another embodiment of this application.
[0021] Figure 7This is a flowchart illustrating an assembly method for an optical display module according to an embodiment of this application.
[0022] Figure 8 This is a schematic diagram of the structure of a display device according to an embodiment of this application.
[0023] Explanation of key component symbols: Display device 100 Optical display module 10 Optical waveguide 11 Installation component 12 121 Light-blocking section First light-shielding layer 1211 Second light-shielding layer 1212 Blocking flange 122 Light Engine 13 Light outlet 131 Fixing adhesive layer 14 Barrier layer 15 Light-gathering surface P1 P2 (Light-emitting surface) First surface P3 Second surface P4 First end face P5 First section, page 51 Second section P52 Second end face P6 outer peripheral surface P7 Third end face P8 Through hole K1 Centerline L Rack 20 The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation
[0024] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.
[0025] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.
[0027] Some embodiments of this application are described in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0028] In related technologies, some optical display modules for display devices include a light source and an optical waveguide, with the light source mounted on the waveguide via a bracket. A light beam emitted from an external display screen is coupled into the waveguide substrate through an input beam structure, propagates within the waveguide substrate via total internal reflection, and is coupled out to the human eye from the output beam structure. To ensure the reliability of light transmission from the light source, the bracket in these technologies prevents light leakage. However, this results in low fixing efficiency between the light source and the bracket. Therefore, the optical display modules in these technologies suffer from low assembly efficiency.
[0029] To address the aforementioned issues, embodiments of this application provide an optical display module that can be used in display devices, such as augmented reality (AR) glasses, virtual reality (VR) glasses, and other smart wearable devices.
[0030] Figure 1 This is a schematic diagram of the structure of an optical display module 10 according to one embodiment. Figure 2 for Figure 1 A cross-sectional view of the optical display module 10 is shown. See also... Figure 1 and Figure 2The optical display module 10 includes an optical waveguide 11, a mounting component 12, a light engine 13, and a fixing adhesive layer 14. The optical waveguide 11 has a light-receiving surface P1. The optical waveguide 11 can be a guiding structure for transmitting optical frequency electromagnetic waves, made of a transparent medium (such as quartz glass or plastic). The mounting component 12 is disposed on the light-receiving surface P1, and has a through hole K1 that connects to the light-receiving surface P1. The light engine 13 has a light-emitting end 131, which forms a light-emitting surface P2. The light-emitting end 131 extends into the through hole K1, and the light-emitting surface P2 corresponds to the light-receiving surface P1. The fixing adhesive layer 14 is disposed between the light-emitting end 131 and the through hole K1. The fixing adhesive layer 14 is configured to cure after being irradiated to fix the light engine 13 and the mounting component 12. The mounting component 12 is provided with a light-shielding part 121, which at least covers the portion of the through hole K1 that does not overlap with the light-emitting end 131, and the light-shielding part 121 includes a color-changing material.
[0031] According to the optical display module 10 of this application, during the assembly process, the color-changing material of the light-shielding portion 121 of the mounting component 12 is in a light-transmitting state. Light can pass through the mounting component 12 to irradiate the fixing adhesive layer 14, causing the fixing adhesive layer 14 to cure and ensuring the curing efficiency of the fixing adhesive layer 14. Subsequently, the color-changing material is controlled to change color, thereby switching the light-shielding portion 121 to a light-shielding state. This allows the mounting component 12 to block the propagation of light between the external environment and the through hole K1, significantly reducing the possibility of light leakage from the light engine 13 through the mounting component 12. Therefore, the optical display module 10 of this application has the advantages of high assembly efficiency and high light transmission accuracy of the light engine 13.
[0032] Optionally, the light emitted from the light-emitting surface P2 by the light engine 13 can be image light. The image light passes through the light-emitting surface P2 to the light-incoming surface P1, then enters the optical waveguide 11 through the light-incoming surface P1, and is emitted to the human eye after reflection and refraction inside the optical waveguide 11.
[0033] In some embodiments, see Figure 2 The centerline L of the through-hole K1 intersects the light-incident surface P1 at an angle. The centerline L of the through-hole K1 is perpendicular to the light-outceasing surface P2. Thus, the light emitted from the light-outceasing surface P2 is parallel to the centerline L of the through-hole K1, and the light emitted from the light-outceasing surface P2 intersects the light-incident surface P1 at an angle. This optimizes the optical path of the optical display module 10, thereby reducing light loss and improving the coupling efficiency between the optical engine 13 and the optical waveguide 11. Furthermore, by adjusting the position of the centerline L of the through-hole K1 relative to the light-incident surface P1, the incident direction of the light can be corrected, thereby ensuring the stability of the optical signal.
[0034] In other embodiments, the center line L of the through hole K1 can also be perpendicular to the light-gathering surface P1.
[0035] Optionally, the optical waveguide 11 has an edge at one end along its length. The through hole K1 is inclined from the edge toward the outside of the optical waveguide 11.
[0036] In some embodiments, the fixing adhesive includes a photosensitive adhesive. The photosensitive adhesive is configured to cure upon irradiation within a curing wavelength range. The curing wavelength range does not overlap with a preset wavelength range. This avoids the possibility of color change in the color-changing material during the curing process of the photosensitive adhesive, thereby ensuring that the color-changing material remains translucent during the curing process of the fixing adhesive.
[0037] Optionally, the photosensitive adhesive can be a UV adhesive (Ultraviolet adhesive). The curing wavelength range corresponding to UV adhesive is the wavelength range of ultraviolet light.
[0038] Optionally, the viscosity of the UV adhesive can be set between 1000 mPa·s and 5000 mPa·s, which has a good viscosity and can reduce the possibility of the UV adhesive falling into the optical waveguide 11. In other embodiments, the viscosity of the UV adhesive can also be greater than 5000 mPa·s.
[0039] In some embodiments, the color-changing material of the light-blocking portion 121 has a light-transmitting state and a light-blocking state. When the color-changing material is not affected by environmental factors such as light, electricity, and temperature, it is in a light-transmitting state with a light transmittance greater than 50%, and its corresponding optical density can be set to a range below 0.3. After being affected by environmental factors such as light, electricity, and temperature for a period of time, the color-changing material switches to a light-blocking state, with an optical density greater than 3 and a light transmittance greater than 99.9%.
[0040] Optionally, after the color-changing material switches to a light-blocking state, the light-blocking part 121 is black or close to black, which has a good light absorption effect.
[0041] In some embodiments, the color-changing material includes a photochromic material. The photochromic material has a light-transmitting state and a light-blocking state, and is configured to switch from the light-transmitting state to the light-blocking state after being irradiated with light of a preset wavelength.
[0042] Understandably, photochromic materials require a short illumination time, typically within tens of seconds, which can further improve assembly efficiency. Furthermore, illumination will not cause excessive temperature rise in the optical waveguide 11 or the mounting component 12, thus having minimal impact on the performance of the optical display module 10, and will not affect the curing effect of the adhesive layer 14.
[0043] Optionally, the preset wavelength is between 495nm and 570nm.
[0044] It is understandable that color-changing materials can also be thermochromic materials or other color-changing materials that switch from a light-transmitting state to a light-blocking state after being stimulated by other factors.
[0045] In some embodiments, the photochromic material includes a photosensitizer and a color-changing precursor. The photosensitizer is configured to switch to an excited state after being irradiated with light of a preset wavelength; the photosensitizer in the excited state is used to drive the color-changing precursor to produce an irreversible reaction and generate colored particles, so that the light-shielding portion 121 switches to a light-shielding state.
[0046] Optionally, the photosensitizer can be a dye that is only sensitive to light of a preset wavelength, so that it can switch to a laser state after being irradiated by light of a preset wavelength, thereby exciting the precursor to produce an irreversible chemical reaction to generate black particles. The black particles distributed in the light-shielding part 121 can switch the light-shielding part 121 to a light-shielding state.
[0047] Alternatively, the photosensitizer can be squareine dyes, rhodamine B derivatives, etc. The color-changing precursor can be silver salts, sodium thiosulfate, or azobenzene derivatives, etc. Silver salts can be... Sodium thiosulfate can be Silver salts undergo a reduction reaction under the action of a photosensitizer to form nano-silver. Sodium thiosulfate produces sulfur precipitate under the catalysis of a photosensitizer. In the above embodiments, after the photosensitizer is irradiated with light of the corresponding wavelength, it undergoes electron transfer. The silver salts reduce silver ions to nano-silver under the action of the transferred electrons, and sodium thiosulfate produces sulfur polymer precipitate under the catalysis of the transferred electrons.
[0048] Furthermore, the color-changing precursor exhibits irreversibility after the reaction, and the resulting colored particles can stably exist within the light-shielding portion 121, thereby ensuring the reliability of the light-shielding function of the light-shielding portion 121. For example, the color-changing precursor is... At that time, the nano-silver formed after the reaction can exist stably. The color-changing precursor is When the reaction occurs, the resulting sulfur polymer can exist stably.
[0049] In some embodiments, see Figure 3 The light-shielding portion 121 is provided on the outer surface of the mounting component 12. In this way, it is possible for the light source of the external environment to directly illuminate the light-shielding portion 121, so that the light-shielding portion 121 changes color, and avoids the risk of incomplete color change caused by the outer layer of the light-shielding portion 121 changing color but the inner layer not changing color, thereby further reducing the risk of light leakage.
[0050] In some embodiments, the light-shielding portion 121 is distributed between the inner and outer surfaces of the mounting member 12. In this way, after the light-shielding portion 121 has completely changed color, it can be ensured that the portion between the inner and outer surfaces of the mounting member 12 can block light, thereby further improving the light leakage prevention effect.
[0051] In some embodiments, see Figure 4 The mounting component 12 has a first surface P3 and a second surface P4. The first surface P3 corresponds to the optical waveguide 11, and the second surface P4 is located on the outer side of the mounting component 12 away from the optical waveguide 11. The light-shielding portion 121 includes a first light-shielding layer 1211 and a second light-shielding layer 1212. The first light-shielding layer 1211 includes a first photochromic material, and the second light-shielding layer 1212 includes a second photochromic material. The first surface P3 and the hole surface of the through hole K1 are provided with the first light-shielding layer 1211, and the second surface P4 is provided with the second light-shielding layer 1212.
[0052] Thus, when the first light-shielding layer 1211 is in a light-shielding state, the first light-shielding layer 1211 located between the first end face P5 and the light-incoming surface P1 can further play a light-shielding effect, reducing the possibility of light leakage emitted by the light engine 13.
[0053] In this embodiment, the mounting element 12 is made of a light-transmitting material. The fixing adhesive layer 14 may also be made of a light-transmitting material.
[0054] Optionally, the first photochromic material is configured to switch to a light-blocking state when irradiated with light within a first preset wavelength range. The second photochromic material is configured to switch to a light-blocking state when irradiated with light within a second preset wavelength range.
[0055] In some embodiments, see Figure 4 The mounting component 12 has a first end face P5, a second end face P6, and an outer peripheral surface P7. The first end face P5 and the second end face P6 are spaced apart along the axial direction of the through hole K1. The two ends of the outer peripheral surface P7 are respectively connected to the first end face P5 and the second end face P6. The first end face P5 is located on the light-entry surface P1 of the optical waveguide 11. The first end face P5 is formed as a first surface P3. The second end face P6 and the outer peripheral surface P7 are formed as a second surface P4.
[0056] Optionally, see Figure 4 The optical waveguide 11 has a third end face P8 formed at one end along its length. The third end face P8 is bent and connected to the light-receiving surface P1. The first end face P5 includes a first segment P51 and a second segment P52. The first segment P51 is located on the light-receiving surface P1. The second segment P52 is bent and connected to the first segment P51, and the second segment P52 is located on the third end face P8.
[0057] In some embodiments, see Figure 5At the opening of the mounting hole opposite to the optical waveguide 11, the mounting member 12 has a protruding blocking flange 122. The blocking flange 122 abuts against the optical engine 13. A fixing adhesive layer 14 is provided between the hole surface of the mounting hole, the surface of the blocking flange 122 facing the optical waveguide 11, and the optical engine 13. After the mounting member 12 is switched to the light-shielding state, the blocking flange 122 can further prevent light leakage.
[0058] Optionally, the blocking flange 122 is provided with a through hole. The through hole communicates with the through hole K1 and is used for injecting fixative to form the fixative layer 14. The optical display module 10 also includes a cover. The cover is configured to close onto the through hole after the fixative layer 14 is fixed.
[0059] In other embodiments, the through hole may also be formed on the side of the mounting member 12.
[0060] In some embodiments, see Figure 6 The optical display module 10 also includes two barrier layers 15. The light-inlet surface P1 is provided with one barrier layer 15, and the optical waveguide 11 is provided with another barrier layer 15 on the surface opposite to the light-inlet surface P1. One end of the fixing adhesive layer 14 extends to the barrier layer 15 on one side of the light-inlet surface P1.
[0061] The barrier layer 15 can prevent the fixing adhesive layer 14 from contaminating the optical waveguide 11, thereby improving the protection of the optical waveguide 11. For example, when the fixing adhesive layer 14 is a UV adhesive, the titanium dioxide inside the optical waveguide 11 may be damaged by the UV adhesive. The barrier layer 15 can improve the protection of the optical waveguide 11.
[0062] Optionally, the material of the barrier layer 15 may be titanium dioxide (TiO2). ), silicon dioxide ( ), aluminum oxide ( ), Niobium pentoxide ( Materials such as )
[0063] See Figure 7 This application also provides an assembly method for an optical display module 10, comprising: providing an optical waveguide 11, a mounting component 12, a light engine 13, and a fixing adhesive; the mounting component 12 having a light-transmitting state and a light-shielding state; placing the mounting component 12 in the light-transmitting state onto the optical waveguide 11; mounting the light engine 13 into the through hole K1 of the mounting component 12; applying the fixing adhesive between the light engine 13 and the hole surface of the through hole K1; curing the fixing adhesive by irradiating it with light to form a fixing adhesive layer 14, which then fixes the light engine 13 and the mounting component 12; and switching the state of the mounting component 12 to the light-shielding state.
[0064] In the assembly method of the optical display module of this embodiment, during the process of light irradiating and curing the adhesive, light can penetrate through the mounting component 12 to achieve efficient curing of the adhesive, thereby improving assembly efficiency. After the mounting component 12 is switched to the light-shielding state, the mounting component 12 can play a role in preventing light leakage and ensuring the propagation accuracy of light between the light engine 13 and the optical waveguide 11.
[0065] In some embodiments, the color-changing material of the mounting component 12 includes a photochromic material. The step of switching the state of the mounting component 12 to a light-blocking state includes: irradiating the mounting component 12 with light at a preset wavelength, so that the mounting component 12 switches from a light-transmitting state to a light-blocking state.
[0066] The details regarding photochromic materials and preset wavelengths can be found in the corresponding sections of the aforementioned embodiments and will not be repeated here. It is understood that by employing photochromic materials to switch the state of the mounting component 12, assembly efficiency can be further improved, and the impact on the optical display module 10 can be reduced.
[0067] In some embodiments, the mounting member 12 has a first surface P3 and a second surface P4. The first surface P3 corresponds to the optical waveguide 11, and the second surface P4 is located on the outer side of the mounting member 12 away from the optical waveguide 11. The light-shielding portion 121 includes a first light-shielding layer 1211 and a second light-shielding layer 1212. The first light-shielding layer 1211 includes a first photochromic material, and the second light-shielding layer 1212 includes a second photochromic material. The first surface P3 and the hole surface of the through hole K1 are provided with the first light-shielding layer 1211. The second surface P4 is provided with the second light-shielding layer 1212. The step of irradiating the mounting member 12 with light at a preset wavelength to switch the mounting member 12 from a light-transmitting state to a light-shielding state includes: firstly, irradiating the hole surface of the through hole K1 with light emitted by the light engine 13, and irradiating the gap between the first surface P3 and the light-entry surface P1, thereby irradiating all the first light-shielding layers 1211, and switching the first light-shielding layers 1211 to a light-shielding state. Then, the second light-shielding layer 1212 is irradiated by an external light source, causing the second light-shielding layer 1212 to switch to the light-shielding state.
[0068] The light emitted by the light engine 13 has a wavelength within a first preset wavelength range. The light emitted by the external light source can be white light or have a wavelength within a second preset wavelength range.
[0069] The first preset wavelength range can be between 495nm and 570nm. The second wavelength range can be between 620nm and 750nm.
[0070] Optionally, the light source of the light engine 13 can be set as an LD light source, which has high optical coupling efficiency and can better control the light within the first preset wavelength range.
[0071] In other embodiments, the light source of the light engine 13 can also be an LED light source, an OLED light source, or other light sources.
[0072] See Figure 8 This application also provides a display device 100. The display device 100 includes a frame 20 and an optical display module 10. The optical display module 10 is disposed on the frame 20. The optical display module 10 is the aforementioned optical display module 10. Alternatively, the optical display module 10 is an optical display module 10 assembled using the aforementioned optical display module assembly method.
[0073] The optical display module 10 of the display device 100 is the optical display module 10 of any of the above embodiments, or the optical display module 10 assembled by the assembly method of any of the above embodiments, thereby having the beneficial effects of any of the above embodiments, which will not be repeated here.
[0074] Optionally, the display device 100 is augmented reality glasses. The frame 20 is the frame of the glasses. The waveguide 11 of the optical display module 10 is shaped like a spectacle lens. In other embodiments, the display device 100 may also be configured as a helmet.
[0075] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.
Claims
1. An optical display module, characterized in that, include: Optical waveguide, wherein the optical waveguide has a light-incoming surface; The mounting component is disposed on the light-receiving surface, and the mounting component has a through hole that connects to the light-receiving surface; A light engine having a light-emitting end, the light-emitting end having a light-emitting surface, the light-emitting end extending into the through hole, and the light-emitting surface being disposed corresponding to the light-incoming surface; A fixing adhesive layer is disposed between the light-emitting end and the through hole, and the fixing adhesive layer is configured to cure after being irradiated to fix the light engine and the mounting component. The mounting component is provided with a light-shielding part, which at least covers the portion of the through hole that does not overlap with the light-emitting end, and the light-shielding part includes a color-changing material.
2. The optical display module according to claim 1, characterized in that: The color-changing material includes a photochromic material, which has a light-transmitting state and a light-blocking state, and is configured to switch from the light-transmitting state to the light-blocking state after being irradiated with light of a preset wavelength.
3. The optical display module according to claim 2, characterized in that: The photochromic material includes a photosensitizer and a color-changing precursor; the photosensitizer is configured to switch to an excited state after being irradiated with light of a preset wavelength; the photosensitizer in the excited state is used to drive the color-changing precursor to produce an irreversible reaction and generate colored particles, so that the light-shielding part switches to the light-shielding state.
4. The optical display module according to claim 1, characterized in that: The light-shielding portion is provided on the outer surface of the mounting component; And / or, The light-shielding portion is distributed between the inner and outer surfaces of the mounting component.
5. The optical display module according to claim 1, characterized in that: The mounting component has a first surface and a second surface, the first surface corresponding to the optical waveguide, and the second surface located on the outer side of the mounting component away from the optical waveguide; The light-shielding portion includes a first light-shielding layer and a second light-shielding layer. The first light-shielding layer includes a first photochromic material, and the second light-shielding layer includes a second photochromic material. The first surface and the hole surface of the through hole are provided with the first light-shielding layer, and the second surface is provided with the second light-shielding layer.
6. The optical display module according to claim 1, characterized in that: The optical display module also includes two barrier layers; the light-incoming surface is provided with one barrier layer, the surface of the optical waveguide facing away from the light-incoming surface is provided with another barrier layer, and one end of the fixing adhesive layer extends to the barrier layer on one side of the light-incoming surface.
7. A method for assembling an optical display module, characterized in that, The method for assembling an optical display module as described in any one of claims 1 to 6 includes: The system provides an optical waveguide, mounting components, an optical engine, and a fixing adhesive, wherein the mounting components have a light-transmitting state and a light-blocking state. The mounting component in the light-transmitting state is placed on the optical waveguide; The light engine is installed in the through hole of the mounting component; A fixing adhesive is placed between the light engine and the hole surface of the through hole. The fixing adhesive is cured by irradiating it with light to form a fixing adhesive layer, which then fixes the light engine and the mounting component. Switch the state of the mounting component to the light-blocking state.
8. The assembly method of the optical display module according to claim 7, characterized in that, The color-changing material of the mounting component includes a photochromic material, and the step of switching the state of the mounting component to the light-blocking state includes: The mounting component is illuminated with light at a preset wavelength, causing it to switch from a light-transmitting state to a light-blocking state.
9. The assembly method of the optical display module according to claim 8, characterized in that: The mounting component has a first surface and a second surface, the first surface corresponding to the optical waveguide, and the second surface located on the outer side of the mounting component away from the optical waveguide; the light-shielding portion includes a first light-shielding layer and a second light-shielding layer, the first light-shielding layer including a first photochromic material, and the second light-shielding layer including a second photochromic material; the first surface and the hole surface of the through hole are provided with the first light-shielding layer, and the second surface is provided with the second light-shielding layer; the step of irradiating the mounting component with light at a preset wavelength to switch the mounting component from the light-transmitting state to the light-shielding state includes: firstly, irradiating the hole surface of the through hole with light emitted by the light engine, and irradiating the gap between the first surface and the light-incoming surface, thereby irradiating all the first light-shielding layers, so that the first light-shielding layers switch to the light-shielding state; then irradiating the second light-shielding layer with an external light source, so that the second light-shielding layer switches to the light-shielding state.
10. A display device, characterized in that, include: frame; An optical display module, wherein the optical display module is mounted on the rack; The optical display module is the optical display module as described in any one of claims 1 to 6, or the optical display module is an optical display module assembled using the assembly method of the optical display module as described in any one of claims 7 to 9.