Optical module, preparation method thereof and wearable equipment

Abstract

The invention relates to the field of electronic equipment, in particular to an optical module and a preparation method thereof and wearable equipment, the optical module comprises an optical assembly and an electrochromic assembly which are connected, the electrochromic assembly comprises an electrochromic layer and a first electrode layer and a second electrode layer which are arranged on the two surfaces of the electrochromic layer respectively, the first electrode layer is located on the surface, facing the optical assembly, of the electrochromic layer. The first electrode layer is integrally formed on the surface of the optical assembly, and no adhesive layer is arranged between the first electrode layer and the optical assembly. According to the optical module provided by the invention, an adhesive layer is not arranged between the first electrode layer and the optical component, that is, the first electrode layer and the optical component are integrally designed, so that the use of connecting materials such as optical adhesive is reduced, and the obtained optical module has the advantages of better optical effect, higher transmittance, clearer imaging and the like.

Description

Technical Field

[0001] This application relates to the field of electronic devices, and particularly to an optical module, a preparation method thereof, and a wearable device. Background Art

[0002] When displaying under the condition of relatively high ambient background brightness, in order to ensure the visibility of the image, the optical engine of the wearable device needs to provide a relatively high brightness. However, traditional wearable devices need to have properties such as small size and low energy consumption, so the power of the optical engine applied to the wearable device is limited, and the maximum brightness that can be emitted is limited.

[0003] After a voltage is applied to the electrochromic material, color changes such as coloring or fading can occur, realizing controllable adjustment of the optical transmittance. Therefore, an optical adhesive is usually used to fix the electrochromic component to the optical component of the wearable device, adjust the intensity of the ambient light entering the field of view of the wearable device from the outside, reduce the ambient background brightness, and thus reduce the brightness requirement and energy consumption of the optical engine of the wearable device. However, when connecting with the optical adhesive, defects such as uneven thickness of the optical adhesive at the connection part are likely to occur, causing pattern deformation, and bubbles are likely to be generated at the connection part or refractive index mismatching defects occur, resulting in problems such as double images or stray light in the pattern, affecting the final visual effect presented. Summary of the Invention

[0004] In view of this, this application provides an optical module, a preparation method thereof, and a wearable device, which can solve at least one of the above technical problems.

[0005] In a first aspect, this application provides an optical module. The optical module includes an optical component and an electrochromic component connected to each other. The electrochromic component includes an electrochromic layer, a first electrode layer, and a second electrode layer respectively disposed on two surfaces of the electrochromic layer. The first electrode layer is located on the surface of the electrochromic layer facing the optical component; the first electrode layer is integrally formed on the surface of the optical component, and no adhesive layer is provided between the first electrode layer and the optical component.

[0006] For the optical module provided by this application, no adhesive layer is provided between the first electrode layer and the optical component, that is, the optical component and the electrochromic component are integrally designed, reducing the use of bonding materials such as optical adhesives. Furthermore, problems such as bubbles, double images, stray light, or refractive index mismatching generated when bonding materials such as optical adhesives connect the optical component and the electrochromic component are reduced. The optical module is thinner and lighter, increasing the transmittance of the display light, optimizing the optical efficiency, reducing the loss of the display light, and improving the final visual effect presented by the wearable device.

[0007] In some embodiments, the optical component includes an optical composite layer and a first optical cover plate disposed on one surface of the optical composite layer, and the first electrode layer is integrally formed on the surface of the optical composite layer facing away from the first optical cover plate.

[0008] In the above solution, the first electrode layer is directly connected to the surface of the optical composite layer facing away from the first optical cover plate, so that the optical composite layer, the first optical cover plate and the electrochromic component form an integrated optical module structure.

[0009] In some embodiments, the optical component further includes a second optical cover plate, the second optical cover plate is located on the surface of the optical composite layer facing away from the first optical cover plate, and the first electrode layer is integrally formed on the surface of the second optical cover plate facing away from the optical composite layer.

[0010] In the above solution, the first electrode layer is directly connected to the surface of the second optical cover plate facing away from the optical composite layer, so that the optical composite layer, the first optical cover plate, the second cover plate and the electrochromic component form an integrated optical module structure.

[0011] In some embodiments, the electrochromic component further includes a transparent substrate, and the transparent substrate is formed on the surface of the second electrode layer facing away from the electrochromic layer.

[0012] In the above solution, the transparent substrate can serve as a support structure for the electrochromic component, providing mechanical strength and stability, and being a transparent material, which can further improve the transmittance of the display light.

[0013] In some embodiments, the electrochromic component further includes a transparent cover plate, and the transparent cover plate is formed on the surface of the transparent substrate facing away from the second electrode layer.

[0014] In the above solution, the transparent cover plate can protect the internal structure of the electrochromic component from environmental factors such as moisture and dust, and extend the service life of the optical module.

[0015] In some embodiments, the electrochromic layer includes at least one of an integrated structure and a layered structure; the integrated structure includes at least one of homogeneous solutions or gels of viologen, metal oxide, Prussian blue and polythiophene; the layered structure includes an electrolyte layer and a solid layer or semi-solid layer disposed on the surface of the electrolyte layer, the electrolyte layer includes at least one of an inorganic solid electrolyte layer and a polymer electrolyte layer, and the solid layer or semi-solid layer includes at least one of a viologen layer, a metal oxide layer, a Prussian blue layer and a polythiophene layer.

[0016] In the above solution, a variety of electrochromic layer options can be provided, with high flexibility.

[0017] In a second aspect, the present application provides a method for manufacturing an optical module, including: forming a first electrode layer on the surface of at least some of the optical components by at least one of magnetron sputtering, evaporation, or coating processes; forming an electrochromic layer on the surface of the first electrode layer facing away from the optical components by at least one of perfusion, magnetron sputtering, or coating processes; and forming a second electrode layer on the surface of the electrochromic layer facing away from the first electrode layer by at least one of magnetron sputtering, evaporation, or coating processes to obtain the optical module.

[0018] In the above solution, a first electrode layer is formed on one surface of the optical components by at least one of magnetron sputtering, evaporation, or coating processes, realizing an integrated design of the optical components and the electrochromic components.

[0019] In some embodiments, the optical components include an optical composite layer and a first optical cover plate respectively disposed on one surface of the optical composite layer; wherein, the first electrode layer is formed on the surface of the optical composite layer facing away from the first optical cover plate by at least one of magnetron sputtering, evaporation, or coating processes.

[0020] In the above solution, the first electrode layer is directly connected to the surface of the optical composite layer facing away from the first optical cover plate, enabling the optical composite layer, the first optical cover plate, and the electrochromic components to form an integrated structure optical module.

[0021] In some embodiments, the first electrode layer is formed on a second optical cover plate by at least one of magnetron sputtering, evaporation, or coating processes; after forming the second electrode layer, the manufacturing method further includes: forming an optical composite layer on the surface of the second optical cover plate facing away from the first electrode layer, and forming a first optical cover plate on the surface of the optical composite layer facing away from the second optical cover plate, the optical composite layer, the first optical cover plate, and the second optical cover plate constituting the optical components, thereby obtaining the optical module.

[0022] In the above solution, the first electrode layer is directly connected to the surface of the second optical cover plate facing away from the optical composite layer, enabling the optical composite layer, the first optical cover plate, the second cover plate, and the electrochromic components to form an integrated structure optical module.

[0023] In a third aspect, the present application provides a wearable device, which includes an image acquisition unit, a processor, and a display unit. The display unit includes the optical module according to any one of the first aspect or the optical module obtained by the preparation method according to any one of the second aspect. The processor is respectively connected to the image acquisition unit and the display unit. Wherein, the image acquisition unit is configured to acquire a target image; the processor is configured to process the target image and send the processed target image to the display unit; and the display unit is configured to display the processed target image. Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the wearable device provided by the present application.

[0025] Figure 2 It is a schematic structural diagram of an optical module provided by the present application.

[0026] Figure 3 It is a schematic structural diagram of an optical component of an optical module provided by the present application.

[0027] Figure 4 It is a schematic structural diagram of another optical module provided by the present application.

[0028] Main Element Symbol Description: 10. Wearable device; 101. Image acquisition unit; 102. Processor; 103. Display unit; 20. Optical module; 1. Optical component; 11. Optical composite layer; 1ll. First filling layer; 112. First optical waveguide substrate; 113. Second filling layer; 114. Second optical waveguide substrate; 115. Third filling layer; 116. Coupling grating; 117. Output coupling grating; 12. First optical cover plate; 13. Second optical cover plate; 2. Electrochromic component; 21. Electrochromic layer; 22. First electrode layer; 23. Second electrode layer; 24. Transparent substrate; 25. Transparent cover plate. Detailed Embodiments

[0029] Next, the technical solutions in the embodiments of the present application will be described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0030] In the existing wearable devices, an optical adhesive is required to connect the optical component and the electrochromic component, resulting in problems such as double images, stray light, or refractive index mismatch in the wearable devices. The present application provides an optical module 20 and a preparation method thereof. The optical component 1 and the electrochromic component 2 with an integrated design are adopted, so that the optical module 20 has the characteristics of being thin and light and having good transmittance, and improves the visual effect finally presented by the wearable device 10.

[0031] In some embodiments, please refer to Figure 1 , the wearable device 10 may be an AR device, which includes an image acquisition unit 101, a processor 102, and a display unit 103. The processor 102 is electrically connected or signal-connected to the image acquisition unit 101 and the display unit 103 respectively. Among them, the image acquisition unit 101 is used to acquire a target image; the processor 102 is used to process the target image and send the processed target image to the display unit 103; the display unit 103 is used to display the processed target image. It can be understood that the wearable device 10 integrates the display content into the real world through the deep coordination of environmental perception by image acquisition, real-time calculation of the processor 102, and virtual-real fusion of the display unit 103.

[0032] Please refer to Figure 2 and Figure 3 , the display unit 103 includes an optical module 20. The optical module 20 includes an optical component 1 and an electrochromic component 2 connected to each other. Among them, the optical component 1 is used to send display light into the human eye, and the electrochromic component 2 is used to adjust the intensity of ambient light entering the visual field of the wearable device 10 from the outside. The electrochromic component 2 at least includes an electrochromic layer 21, a first electrode layer 22, and a second electrode layer 23 respectively disposed on two surfaces of the electrochromic layer 21. The first electrode layer 22 is located on the surface of the electrochromic layer 21 facing the optical component 1, and the first electrode layer 22 is integrally formed on the surface of the optical component 1, and no adhesive layer is provided between the first electrode layer 22 and the optical component 1. It can be understood that no adhesive layer is provided between the first electrode layer 22 and the optical component 1, that is, the optical component 1 and the electrochromic component 2 are of an integrated design, reducing the use of bonding materials such as optical adhesives. Furthermore, problems such as bubbles, double images, stray light, or refractive index mismatch generated when the optical component 1 and the electrochromic component 2 are connected by bonding materials such as optical adhesives are reduced. The optical module 20 is thinner and lighter, increasing the transmittance of the display light, optimizing the optical efficiency, reducing the loss of the display light, and improving the visual effect finally presented by the wearable device 10.

[0033] After the optical component 1 and the electrochromic component 2 are assembled, a voltage is applied to the optical module 20. An electrochemical reaction occurs in the electrochromic component 2, resulting in color changes such as coloring or fading, thereby achieving controllable adjustment of the optical transmittance of the optical module 20 to reduce the ambient background brightness, and further reducing the brightness requirement and energy consumption of the optical engine of the wearable device 10.

[0034] In some embodiments, the electrochromic component 2 further includes a transparent substrate 24 formed on the surface of the second electrode layer 23 facing away from the electrochromic layer 21. It can be understood that the transparent substrate 24 can serve as a support structure for the electrochromic component 2, providing mechanical strength and stability, and being a transparent material, which can further improve the transmittance of the display light.

[0035] In some embodiments, the electrochromic component 2 further includes a transparent cover plate 25 formed on the surface of the transparent substrate 24 facing away from the second electrode layer 23. It can be understood that the transparent cover plate 25 can protect the internal structure of the electrochromic component 2 from environmental factors such as moisture and dust, and extend the service life of the optical module 20.

[0036] In some embodiments, the electrochromic layer 21 includes at least one of an integral structure and a layered structure. Among them, the integral structure includes at least one of homogeneous solutions or gels of viologen, metal oxides, Prussian blue, and polythiophene, and the electrochromic layer 21 with an integral structure can be selected according to actual needs. The layered structure includes an electrolyte layer and a solid layer or semi-solid layer disposed on the surface of the electrolyte layer. The electrolyte layer includes at least one of an inorganic solid electrolyte layer and a polymer electrolyte layer. The solid layer or semi-solid layer includes at least one of a viologen layer, a metal oxide layer, a Prussian blue layer, and a polythiophene layer. The types of the electrolyte, the solid layer, or the semi-solid layer can be selected according to actual needs. It can be understood that the selection of the above-mentioned various electrochromic layers 21 further improves the flexibility of the wearable device 10.

[0037] In some embodiments, the first electrode layer 22 and the second electrode layer 23 are used to receive a voltage, causing the electrochromic component 2 to change color. The materials of the first electrode layer 22 and the second electrode layer 23 include at least one of indium tin oxide (ITO), poly(3,4-ethylenedioxythiophene):polystyrene sulfonate, copper metal grid, or silver metal grid, and the materials of the first electrode layer 22 and the second electrode layer 23 can be selected according to actual needs.

[0038] In some embodiments, please continue to refer to Figure 2, the optical component 1 includes an optical composite layer 11 and a first optical cover plate 12 disposed on one surface of the optical composite layer 11. The first electrode layer 22 is integrally formed on the surface of the optical composite layer 11 facing away from the first optical cover plate 12. That is, the optical module 20 includes the first optical cover plate 12, the optical composite layer 11, the first electrode layer 22, the electrochromic layer 21, and the second electrode layer 23 stacked in sequence.

[0039] In some embodiments, please continue to refer to Figure 3 , the optical component 1 further includes a second optical cover plate 13. The second optical cover plate 13 is located on the surface of the optical composite layer 11 facing away from the first optical cover plate 12. The first electrode layer 22 is integrally formed on the surface of the second optical cover plate 13 facing away from the optical composite layer 11. That is, the structure of the optical module 20 includes the first optical cover plate 12, the optical composite layer 11, the second optical cover plate 13, the first electrode layer 22, the electrochromic layer 21, and the second electrode layer 23 stacked in sequence.

[0040] In some embodiments, the optical component 1 includes at least one of a prism, free space, a bird bath mirror, a reflective optical waveguide, a diffractive optical waveguide, and a holographic optical waveguide. The type of the optical component 1 can be selected according to actual needs. It can be understood that multiple optical components 1 provide multiple choices, which can accurately adapt to the different scenario requirements of the wearable device 10 with high flexibility. Optionally, the optical component 1 used in this application is an SRG (surface relief grating) diffractive optical waveguide. Among them, please refer to Figure 4 , the optical composite layer 11 of the SRG diffractive optical waveguide includes a first filling layer 111, a first optical waveguide substrate 112, a second filling layer 113, a second optical waveguide substrate 114, a third filling layer 115, an input grating 116, and an output grating 117 stacked. Among them, the first filling layer 111, the second filling layer 113, and the third filling layer 115 include resin layers with a low refractive index, and the first filling layer 111 is connected to the first optical cover plate 12, and the third filling layer 115 is connected to the second optical cover plate 13.

[0041] For the above technical solution, this application provides a preparation method of an optical module 20, including the following steps: Step S10, forming the first electrode layer 22 on the surface of at least part of the optical component 1 by at least one of magnetron sputtering, evaporation, or coating processes; Step S20, forming the electrochromic layer 21 on the surface of the first electrode layer 22 facing away from the optical component 1 by at least one of perfusion, magnetron sputtering, or coating processes; Step S30, forming the second electrode layer 23 on the surface of the electrochromic layer 21 facing away from the first electrode layer 22 by at least one of magnetron sputtering, evaporation, or coating processes to obtain the optical module 20.

[0042] In step S10: As an optional technical solution of the present application, the optical component 1 includes an optical composite layer 11 and a first optical cover plate 12 and a second optical cover plate 13 respectively arranged on the surfaces of the optical composite layer 11, wherein the first electrode layer 22 is formed on the surface of the second optical cover plate 13 facing away from the optical composite layer 11 by at least one of magnetron sputtering, evaporation or coating processes.

[0043] As another optional technical solution of the present application, the optical component 1 includes an optical composite layer 11 and a first optical cover plate 12 respectively arranged on the surface of the optical composite layer 11, wherein the first electrode layer 22 is formed on the surface of the optical composite layer 11 away from the first optical cover plate 12 by at least one of magnetron sputtering, evaporation or coating processes.

[0044] As another optional technical solution of the present application, a second optical cover plate 13 is first obtained, and the first electrode layer 22 is formed on the second optical cover plate 13 using at least one of magnetron sputtering, evaporation, or coating processes. After the second electrode layer 23 is formed, the preparation method of step S10 further includes: forming an optical composite layer 11 on a surface of the second optical cover plate 13 facing away from the first electrode layer 22, and forming a first optical cover plate 12 on a surface of the optical composite layer 11 facing away from the second optical cover plate 13. The optical composite layer 11, the first optical cover plate 12, and the second optical cover plate 13 constitute an optical assembly 1, thereby obtaining an optical module 20.

[0045] It can be understood that the above preparation methods all use at least one of magnetron sputtering, evaporation or coating processes to connect the electrochromic component 2 to the optical component 1, realizing an integrated design of the electrochromic component 2 and the optical component 1, without the use of adhesive materials such as optical glue. Compared with directly using optical glue to connect the electrochromic component 2 to the optical component 1, the use of optical glue and part of the substrate in the electrochromic component 2 or the optical component 1 can be reduced, the process is simplified and the bonding step is omitted, thereby reducing the production cost of the optical module 20; and according to the different materials of the first optical cover plate 12, the optical composite layer 11, the second optical cover plate 13, the first electrode layer 22, the electrochromic layer 21 and the second electrode layer 23, different preparation methods selected in step S10 can obtain the optical module 20 of the present application.

[0046] The technical solution of this application is described below with reference to specific embodiments: Example 1 (1) Cleaning the second optical substrate of the optical assembly 1; (2) sputtering ITO onto the surface of the second optical substrate facing away from the optical composite layer using a magnetron sputtering process to form a first electrode layer 22; (3) preparing a Prussian blue layer on the surface of the first electrode layer 22 facing away from the second optical substrate by a coating process; (4) The ITO is sputtered on the surface of the Prussian blue layer facing away from the first electrode layer 22 by magnetron sputtering to form the second electrode layer 23, and the transparent substrate 24 is covered to obtain the optical module 20.

[0047] Example 2 (1) Clean the surface of the optical composite layer 11 facing away from the first optical substrate; (2) The ITO is sputtered on the surface of the optical composite layer 11 facing away from the first optical substrate by magnetron sputtering to form the first electrode layer 22; (3) Prepare the Prussian blue layer on the surface of the first electrode layer 22 facing away from the optical composite layer 11 by coating process; (4) The ITO is sputtered on the surface of the Prussian blue layer facing away from the first electrode layer 22 by magnetron sputtering to form the second electrode layer 23, and the transparent substrate 24 is covered to obtain the optical module 20.

[0048] Example 3 (1) Clean one surface of the second optical cover plate 13; (2) The ITO is sputtered on one surface of the second optical cover plate 13 by magnetron sputtering to form the first electrode layer 22; (3) Prepare the Prussian blue layer on the surface of the first electrode layer 22 facing away from the second optical cover plate 13 by coating process; (4) The ITO is sputtered on the surface of the Prussian blue layer facing away from the first electrode layer 22 by magnetron sputtering to form the second electrode layer 23, and the transparent substrate 24 is covered on the surface of the second electrode layer 23 facing away from the Prussian blue layer to obtain the electrochromic component 2; (5) Form the optical composite layer 11 on the other surface of the second optical cover plate 13, and form the first optical cover plate 12 on the surface of the optical composite layer 11 facing away from the second backplane to obtain the optical module 20.

[0049] Comparative Example 1 (1) Obtain the optical component 1 and the electrochromic component 2, and bond and connect the second cover plate of the optical component 1 and the transparent substrate 24 of the electrochromic component 2 with optical glue to obtain the optical module 20.

[0050] Test: (1) Use a BYK4775 type haze - transmittance tester (or a similar model, such as the Haze - Gd series) to measure the transmittance of the optical modules 20 of Examples 1 - 3 and Comparative Example 1.

[0051] (2) Observe the number of bubbles in Examples 1 - 3 and Comparative Example 1.

[0052] (3) Use an optical detection device to detect the image ghosting and distortion rate of Examples 1 - 3 and Comparative Example 1. Test results: Analysis of test results: Compared with Comparative Example 1, in Examples 1 to 3, the optical component 1 and the electrochromic component 2 are integrally designed, reducing the use of bonding materials such as optical glue, and reducing problems such as bubbles, double images, stray light, or refractive index mismatch when bonding materials such as optical glue connect the optical component 1 and the electrochromic component 2. The optical module 20 is thinner and lighter, increasing the transmittance of the display light, optimizing the optical efficiency, reducing the loss of the display light, and improving the visual effect finally presented by the wearable device 10. In Comparative Example 1, the electrochromic component 2 and the optical component 1 are directly connected using optical glue, and bubbles are generated at the connection, and the image double image and distortion rate are relatively high, affecting the image presentation effect.

[0053] In addition, those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present application, rather than to limit the present application. As long as within the scope of the essential spirit of the present application, appropriate changes and variations made to the above embodiments fall within the scope of the disclosure of the present application.

Claims

1. An optical module, the optical module includes an optically connected optical component and an electrochromic component, the electrochromic component includes an electrochromic layer and a first electrode layer and a second electrode layer respectively disposed on two surfaces of the electrochromic layer, and the first electrode layer is located on the surface of the electrochromic layer facing the optical component; It is characterized in that The first electrode layer is integrally formed on the surface of the optical component, and no adhesive layer is provided between the first electrode layer and the optical component.

2. The optical module according to claim 1, characterized in that, The optical component includes an optical composite layer and a first optical cover plate disposed on one surface of the optical composite layer, and the first electrode layer is integrally formed on the surface of the optical composite layer facing away from the first optical cover plate.

3. The optical module according to claim 2, characterized in that, The optical component further includes a second optical cover plate, the second optical cover plate is located on the surface of the optical composite layer facing away from the first optical cover plate, and the first electrode layer is integrally formed on the surface of the second optical cover plate facing away from the optical composite layer.

4. The optical module according to claim 1, wherein The electrochromic component further includes a transparent substrate, and the transparent substrate is formed on the surface of the second electrode layer facing away from the electrochromic layer.

5. The optical module according to claim 4, wherein The electrochromic component further includes a transparent cover plate, and the transparent cover plate is formed on the surface of the transparent substrate facing away from the second electrode layer.

6. The optical module according to claim 1, wherein The electrochromic layer includes at least one of a monolithic structure and a layered structure; The monolithic structure includes at least one of homogeneous solutions or gels of viologen, metal oxides, Prussian blue, and polythiophene; The layered structure includes an electrolyte layer and a solid layer or a semi-solid layer disposed on the surface of the electrolyte layer. The electrolyte layer includes at least one of an inorganic solid electrolyte layer and a polymer electrolyte layer, and the solid layer or the semi-solid layer includes at least one of a viologen layer, a metal oxide layer, a Prussian blue layer, and a polythiophene layer.

7. A method for preparing an optical module, characterized in that, Including: Forming a first electrode layer on the surface of at least a part of the optical component by at least one of magnetron sputtering, evaporation, or coating processes; Forming an electrochromic layer on the surface of the first electrode layer facing away from the optical component by at least one of perfusion, magnetron sputtering, or coating processes; Forming a second electrode layer on the surface of the electrochromic layer facing away from the first electrode layer by at least one of magnetron sputtering, evaporation, or coating processes to obtain the optical module.

8. The manufacturing method of the optical module according to claim 7, wherein, The optical component includes an optical composite layer and a first optical cover plate respectively disposed on one surface of the optical composite layer; Wherein, the first electrode layer is formed on the surface of the optical composite layer facing away from the first optical cover plate by at least one of magnetron sputtering, evaporation, or coating processes.

9. The manufacturing method of the optical module according to claim 7, characterized in that, The first electrode layer is formed on the second optical cover plate by at least one of magnetron sputtering, evaporation, or coating processes; After forming the second electrode layer, the preparation method further includes: Forming an optical composite layer on the surface of the second optical cover plate facing away from the first electrode layer, and forming a first optical cover plate on the surface of the optical composite layer facing away from the second optical cover plate. The optical composite layer, the first optical cover plate, and the second optical cover plate constitute the optical component, thereby obtaining the optical module.

10. A wearable device, characterized in that, The wearable device includes an image acquisition unit, a processor, and a display unit. The display unit includes the optical module according to any one of claims 1 to 6 or the optical module obtained by the preparation method of the optical module according to any one of claims 7 to 9. The processor is respectively connected to the image acquisition unit and the display unit; Wherein, the image acquisition unit is configured to acquire a target image; the processor is configured to process the target image and send the processed target image to the display unit; the display unit is configured to display the processed target image.

Images