Optical film imitation jig
By adding anti-slip material to the optical film molding fixture to increase friction, the strain problem during the optical film molding process is solved, ensuring the stability of the optical properties of the optical film and improving the imaging quality of virtual reality, augmented reality, and mixed reality devices.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- INTERFACE OPTOELECTRONICS (SHENZHEN) CO LTD
- Filing Date
- 2023-11-28
- Publication Date
- 2026-05-26
Smart Images
Figure CN117416034B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of display technology, and in particular to an optical film molding fixture. Background Technology
[0002] Virtual reality (VR), augmented reality (AR), and mixed reality (MR) are popular technologies in recent years, and wearable devices for virtual, augmented, or mixed reality often use curved lenses. Optical films are typically bonded to curved lenses. Before being bonded to the curved lens, the optical film needs to undergo a molding process to ensure its shape easily matches the curved lens. However, with current optical film molding technologies, the optical film is prone to significant strain, which can cause unpredictable effects on its optical properties (e.g., transmittance, haze, image retardation, and polarization state). Summary of the Invention
[0003] In view of this, one objective of this application is to provide an optical film profilograph fixture that can reduce the strain of the optical film.
[0004] To achieve the above objectives, according to some embodiments of this application, an optical film conforming fixture includes a base, a conforming structure, and a first anti-slip material. The conforming structure protrudes from one side of the base and has a curved surface. The conforming structure is configured to press the optical film to deform it into a predetermined shape. The first anti-slip material is disposed on the curved surface of the conforming structure. A first static friction coefficient exists between the curved surface and the optical film, and a second static friction coefficient exists between the first anti-slip material and the optical film, the second static friction coefficient being greater than the first static friction coefficient.
[0005] In one or more embodiments of this application, the first anti-slip material is disposed on the top of the curved surface of the contour structure.
[0006] In one or more embodiments of this application, the first anti-slip material comprises a polymer film that at least partially covers the curved surface of the contoured structure.
[0007] In one or more embodiments of this application, the first anti-slip material occupies a region on the curved surface of the contour structure, and the ratio of the area of this region to the total area of the curved surface is greater than or equal to 0.1.
[0008] In one or more embodiments of this application, the second static friction coefficient is greater than or equal to 0.25.
[0009] In one or more embodiments of this application, the first anti-slip material includes a metal member that at least partially covers the curved surface of the contour structure and has an outer surface away from the contour structure, the outer surface having anti-slip microstructures.
[0010] In one or more embodiments of this application, a surface microstructure is formed on the curved surface of the contour structure, and the surface microstructure serves as a first anti-slip material.
[0011] In one or more embodiments of this application, the optical film conforming fixture further includes a second anti-slip material disposed on the curved surface of the conforming structure. The second anti-slip material has a third static friction coefficient with the optical film, which is greater than the first static friction coefficient but different from the second static friction coefficient.
[0012] In one or more embodiments of this application, a first anti-slip material is disposed on the top of the curved surface of the contoured structure, while a second anti-slip material is disposed around the periphery of the first anti-slip material. The second static friction coefficient is greater than the third static friction coefficient.
[0013] In one or more embodiments of this application, the second anti-slip material is a polymer film, a metal part with surface microstructure, or a surface microstructure formed on the curved surface of the contour structure.
[0014] In summary, in the optical film profiling fixture of this application, at least one anti-slip material is provided on the curved surface of the profiling structure (i.e., the protruding structure used to compress the optical film to deform it into a predetermined shape). The anti-slip material has a larger static friction coefficient than the curved surface of the profiling structure, thus increasing friction. This prevents excessive strain on the optical film after the pre-forming step, which could affect its optical properties such as transmittance, haze, image retardation, and polarization state. Therefore, using the optical film profiling fixture of this application for pre-forming optical films ensures the quality of the optical film, thereby enabling wearable devices using curved lenses to achieve good imaging results. Attached Figure Description
[0015] To make the above and other objects, features, advantages and embodiments of this application more apparent and understandable, the accompanying drawings are described below:
[0016] Figure 1 This is a schematic top view of an optical film molding fixture according to an embodiment of this application.
[0017] Figure 2 for Figure 1 The cross-sectional view of the optical film molding fixture along line segment 2-2' is shown.
[0018] Figure 3a Strain simulation diagram of the optical film after pre-forming using a profile jig without anti-slip material.
[0019] Figure 3b A simulation diagram of the strain of the optical film after pre-forming using an optical film profilometry fixture with a first anti-slip material.
[0020] Figure 4 This is a schematic diagram of how the shaped optical film is bonded to a curved lens.
[0021] Figure 5a This is a schematic cross-sectional view of an optical film molding fixture according to another embodiment of this application.
[0022] Figure 5b for Figure 5a A magnified schematic diagram of the structure at point A in the middle.
[0023] Figure 6 This is a schematic cross-sectional view of an optical film molding fixture according to another embodiment of this application.
[0024] Figure 7 This is a schematic top view of an optical film molding fixture according to another embodiment of this application.
[0025] Explanation of reference numerals in the attached figures:
[0026] 10,11,12,13: Optical film copying fixture
[0027] 30: Base
[0028] 31: Imitation Structure
[0029] 35: Curved Surface
[0030] 50, 51, 52, 53: First anti-slip material
[0031] 56: Anti-slip microstructure
[0032] 57: Surface microstructure
[0033] 60: Second anti-slip material
[0034] 71: Curved Lens
[0035] 73: Fitting jig
[0036] 75: Lens Receiving Slot
[0037] 77: Supporting components
[0038] 90: Optical film
[0039] 96: Supporting membrane Detailed Implementation
[0040] To make the description of this application more detailed and complete, reference can be made to the accompanying drawings and the various embodiments described below. The components in the drawings are not drawn to scale and are provided for illustrative purposes only. Many practical details are described below to provide a comprehensive understanding of this application; however, those skilled in the art should understand that this application can be implemented without one or more of these practical details, and therefore, these details should not be used to limit this application.
[0041] Please refer to Figure 1 as well as Figure 2 . Figure 1 This is a schematic top view of an optical film molding fixture 10 according to an embodiment of this application, and Figure 2 for Figure 1 The optical film profiling fixture 10 shown is a cross-sectional view along line segment 2-2'. The optical film profiling fixture 10 is used to pre-form an optical film 90 to facilitate its attachment to a curved lens. Curved lenses are used, for example, in wearable devices for virtual reality, augmented reality, or mixed reality, but are not limited thereto. The optical film profiling fixture 10 includes a base 30 and a profiling structure 31. The profiling structure 31 is disposed on the base 30 and protrudes from one side of the base 30 (e.g., protruding from the upper surface of the base 30). The profiling structure 31 has a curved surface 35, which can be an arc, hemispherical, or other shaped surface. The profiling structure 31 is configured to compress the optical film 90 to deform it into a predetermined shape. This predetermined shape depends on the shape and curvature of the curved lens to which the optical film 90 is to be fitted; therefore, the shape and curvature of the curved surface 35 of the profiling structure 31 also depend on the shape and curvature of the curved lens to which the optical film 90 is to be fitted.
[0042] like Figure 1 and Figure 2 As shown, during the pre-forming of the optical film 90, the optical film 90 can be placed on the side of the optical film molding fixture 10 with the molding structure 31, and then force is applied to press the optical film 90 against the optical film molding fixture 10 (a displacement mechanism can be used to drive the optical film 90 toward the optical film molding fixture 10 and press it against the optical film molding fixture 10, or a displacement mechanism can be used to drive the optical film molding fixture 10 toward the optical film 90 and press it against the optical film 90). In this way, the optical film 90 is compressed by the molding structure 31 and changes to a concave shape complementary to the curved surface 35. In some embodiments, a carrier film 96 can be used to support the optical film 90 during the pre-forming step and the subsequent bonding step.
[0043] In some embodiments, the base 30 and the contouring structure 31 may be integrally formed. In some embodiments, the base 30 and the contouring structure 31 are integrally formed metal parts. In some embodiments, the base 30 and the contouring structure 31 may be manufactured by milling.
[0044] like Figure 1 and Figure 2As shown, the optical film conforming fixture 10 also includes a first anti-slip material 50, which is disposed on the curved surface 35 of the conforming structure 31. The first anti-slip material 50 has a larger static friction coefficient than the curved surface 35 of the conforming structure 31. Specifically, the curved surface 35 of the conforming structure 31 has a first static friction coefficient with the optical film 90, and the first anti-slip material 50 has a second static friction coefficient with the optical film 90, and the second static friction coefficient is greater than the first static friction coefficient.
[0045] The first anti-slip material 50 increases the friction between the contact surface between the optical film molding fixture 10 and the optical film 90, preventing excessive strain on the optical film 90 after the pre-forming step, which would affect the optical properties of the optical film 90 in the visible spectrum, such as transmittance, haze, image retardation, and polarization state. Therefore, using the optical film molding fixture 10 of this application for the pre-forming of the optical film 90 can ensure the quality of the optical film 90 and enable wearable devices using curved lenses to have good imaging effects.
[0046] like Figure 1 and Figure 2 As shown, in some embodiments, the first anti-slip material 50 is disposed on the top of the curved surface 35 of the contouring structure 31 (e.g., the vertex of the curved surface 35 of the contouring structure 31 and the area surrounding the vertex). The top of the curved surface 35 of the contouring structure 31 corresponds to the central region of the optical film 90, which is generally prone to large strain. Therefore, disposing the first anti-slip material 50 on the top of the curved surface 35 of the contouring structure 31 can effectively prevent excessive local strain (i.e., strain sufficient to affect the optical properties of the optical film 90) from occurring in the optical film 90.
[0047] Please refer to Figure 3a and Figure 3b , Figure 3a The strain simulation diagram of the optical film 90 after pre-forming using a contour jig without anti-slip material is shown. Figure 3b This is a strain simulation diagram of the optical film 90 after pre-forming using the optical film molding fixture 10 with the first anti-slip material 50 described above. As mentioned above, the optical film 90 generally tends to experience larger strain near the center. Figure 3a and Figure 3b It can be seen that Figure 3b In the middle, the strain of the optical film 90 near the center is significantly lower. That is, after the optical film molding fixture 10 and the first anti-slip material 50 are added, the central area of the optical film 90 will not generate excessive strain, which can meet the product's requirements for optical properties.
[0048] Please continue to refer to Figure 1 and Figure 2In some embodiments, the first anti-slip material 50 comprises a polymer film that at least partially covers the curved surface 35 of the contour structure 31 (e.g., covers the top of the curved surface 35 of the contour structure 31). The polymer film may be fixed to the curved surface 35 of the contour structure 31 by coating, embedding, or other suitable means. The polymer film may include silicone, silicone rubber, or other polymer materials.
[0049] like Figure 1 and Figure 2 As shown, in some embodiments, the first anti-slip material 50 occupies a region on the curved surface 35 of the contour structure 31, and the ratio of the area of this region (e.g., the area of the outer surface of the polymer film away from the curved surface 35) to the total area of the curved surface 35 is greater than or equal to 0.1. In other words, the first anti-slip material 50 occupies at least 10% of the area of the curved surface 35 to effectively reduce the strain of the optical film 90. In some embodiments, the second static friction coefficient (between the first anti-slip material 50 and the optical film 90) is greater than or equal to 0.25 to effectively reduce the strain of the optical film 90.
[0050] It should be noted that the shape of the first anti-slip material 50 is not specifically limited; it can be a circle as shown in the figure, or an ellipse or other shapes. Furthermore, the first anti-slip material 50 is not limited to a one-piece molded film as shown in the figure; it can also be composed of multiple films of the same material pieced together.
[0051] Please refer to Figure 4 , Figure 4 This is a schematic diagram illustrating the bonding of the formed optical film 90 to the curved lens 71. As shown, a bonding fixture 73 is used in the bonding process of the optical film 90. The bonding fixture 73 has a lens receiving groove 75, in which the curved lens 71 can be placed. One or more support members 77 are disposed beside the bonding fixture 73 to support a carrier film 96 and the optical film 90 located on the carrier film 96. The carrier film 96 is placed on the support member 77, and the formed optical film 90 on the carrier film 96 is aligned and faces the curved lens 71. The bonding fixture 73 can be connected to a lifting mechanism, which drives the bonding fixture 73 to rise, causing the optical film 90 to contact and bond to the curved lens 71.
[0052] Please refer to Figure 5a and Figure 5b , Figure 5a This is a schematic cross-sectional view of an optical film molding fixture 11 according to another embodiment of this application. Figure 5b for Figure 5aA partially enlarged structural diagram at point A. The optical film conforming fixture 11 includes a base 30, a conforming structure 31, and a first anti-slip material 51. The conforming structure 31 is disposed on the base 30 and has a curved surface 35. The first anti-slip material 51 is disposed on the curved surface 35 of the conforming structure 31. The difference between this embodiment and the previous embodiment is that the first anti-slip material 51 of the optical film conforming fixture 11 in this embodiment is a metal part, and the metal part at least partially covers the curved surface 35 of the conforming structure 31. The metal part has an outer surface (i.e., the surface of the metal part away from the conforming structure 31), and the outer surface of the metal part has anti-slip microstructures 56 (i.e., surface microstructures of the metal part used to increase friction; the figure is for illustration only and is not drawn according to actual shape, size, and quantity).
[0053] In some embodiments, the curved surface 35 of the contouring structure 31 and the optical film 90 (see reference) Figure 2 The anti-slip microstructure 56 and the optical film 90 have a first static friction coefficient, and the anti-slip microstructure 56 and the optical film 90 have a second static friction coefficient, which is greater than the first static friction coefficient. In some embodiments, the second static friction coefficient between the anti-slip microstructure 56 and the optical film 90 is greater than or equal to 0.25. In some embodiments, the ratio of the area occupied by the anti-slip microstructure 56 to the total area of the curved surface 35 is greater than or equal to 0.1.
[0054] The metal part (i.e., the first anti-slip material 51) can be fixed to the curved surface 35 of the contour structure 31 by adhesive or other suitable means (e.g., fixed to the top of the curved surface 35 of the contour structure 31), and the anti-slip microstructure 56 of the metal part can be formed by performing a surface treatment on the outer surface of the metal part. In addition, the metal part (i.e., the first anti-slip material 51), the base 30, and the contour structure 31 can be made of the same metal material or different metal materials.
[0055] Please refer to Figure 6 , Figure 6 This is a schematic cross-sectional view of an optical film molding fixture 12 according to another embodiment of this application. The optical film molding fixture 12 includes a base 30, a molding structure 31, and a first anti-slip material 52. The molding structure 31 is disposed on the base 30 and has a curved surface 35. This embodiment and Figure 5a and Figure 5b The difference in the embodiment shown is that a surface microstructure 57 is formed on the curved surface 35 of the contour structure 31 in this embodiment, and the surface microstructure 57 serves as the first anti-slip material 52.
[0056] Surface microstructure 57 can be a surface uneven structure similar to the aforementioned anti-slip microstructure 56. The portion of the curved surface 35 without surface microstructure 57 is connected to the optical film 90 (see reference). Figure 2The two surfaces have a first static friction coefficient, and the portion of the curved surface 35 with the surface microstructure 57 has a second static friction coefficient with the optical film 90, and the second static friction coefficient is greater than the first static friction coefficient. The surface microstructure 57 can be formed by performing surface treatment on the curved surface 35 of the contour structure 31.
[0057] Please refer to Figure 7 , Figure 7 This is a schematic top view of an optical film conforming fixture 13 according to another embodiment of this application. The optical film conforming fixture 13 includes a base 30 and a conforming structure 31. The conforming structure 31 is disposed on the base 30 and has a curved surface 35. Unlike the aforementioned embodiment, the optical film conforming fixture 13 includes two different anti-slip materials to provide an effect of increasing friction. Specifically, the optical film conforming fixture 13 includes a first anti-slip material 53 and a second anti-slip material 60 disposed on the curved surface 35 of the conforming structure 31. The second anti-slip material 60 and the optical film 90 (see reference) Figure 2 There is a third static friction coefficient between them, which is greater than the first static friction coefficient and different from the second static friction coefficient. The first anti-slip material 53 can be the aforementioned first anti-slip material 50, first anti-slip material 51, or first anti-slip material 52. For example, the first anti-slip material 53 and the second anti-slip material 60 may include different materials or undergo different surface treatments, so that the first anti-slip material 53 and the second anti-slip material 60 have different static friction coefficients.
[0058] like Figure 7 As shown, in some embodiments, the first anti-slip material 53 is disposed on the top of the curved surface 35 of the contour structure 31, and the second anti-slip material 60 is disposed around the first anti-slip material 53 (e.g., the second anti-slip material 60 may be disposed around the first anti-slip material 53), and the second static friction coefficient is greater than the third static friction coefficient. As mentioned above, the area near the center of the optical film is generally prone to large strain, and the strain decreases with distance from the center of the optical film. Therefore, to address this characteristic, a first anti-slip material 53 with a relatively large static friction coefficient can be disposed on the top of the curved surface 35 corresponding to the center of the optical film, and a second anti-slip material 60 with a relatively small static friction coefficient can be disposed around the first anti-slip material 53, thereby preventing excessive strain in the optical film.
[0059] In some embodiments, the second anti-slip material 60 may be a polymer film disposed on the curved surface 35 of the contour structure 31, a metal part disposed on the curved surface 35 of the contour structure 31 and having an anti-slip microstructure, or a surface microstructure formed on the curved surface 35 of the contour structure 31.
[0060] In some embodiments, the third static friction coefficient is greater than or equal to 0.25. In some embodiments, the first anti-slip material 53 and the second anti-slip material 60 occupy a region on the curved surface 35 of the contouring structure 31, the ratio of the area of this region to the total area of the curved surface 35 is greater than or equal to 0.1. In other words, the first anti-slip material 53 and the second anti-slip material 60 occupy at least 10% of the area of the curved surface 35. In some embodiments, the optical film contouring fixture may include three or more anti-slip materials with different static friction coefficients to provide an effect of increasing friction.
[0061] In summary, in the optical film profiling fixture of this application, at least one anti-slip material is provided on the curved surface of the profiling structure (i.e., the protruding structure used to compress the optical film to deform it into a predetermined shape). The anti-slip material has a larger static friction coefficient than the curved surface of the profiling structure, thus increasing friction. This prevents excessive strain on the optical film after the pre-forming step, which could affect its optical properties such as transmittance, haze, image retardation, and polarization state. Therefore, using the optical film profiling fixture of this application for pre-forming optical films ensures the quality of the optical film, thereby enabling wearable devices using curved lenses to achieve good imaging results.
[0062] Although the present application has disclosed the embodiments as described above, it is not intended to limit the present application. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be determined by the claims.
Claims
1. An optical film conforming fixture, characterized in that, include: Base; A contouring structure protrudes from one side of the base and has a curved surface; the contouring structure is configured to compress the optical film to deform the optical film into a predetermined shape. as well as A first anti-slip material is disposed on the top of the curved surface of the contour structure. The curved surface and the optical film have a first static friction coefficient, and the first anti-slip material and the optical film have a second static friction coefficient, which is greater than the first static friction coefficient.
2. The optical film conforming fixture as described in claim 1, characterized in that, The first anti-slip material comprises a polymer film that at least partially covers the curved surface of the contoured structure.
3. The optical film conforming fixture as described in claim 1, characterized in that, The first anti-slip material occupies a region on the curved surface of the contour structure, and the ratio of the area of the region to the total area of the curved surface is greater than or equal to 0.
1.
4. The optical film conforming fixture as described in claim 1, characterized in that, The second static friction coefficient is greater than or equal to 0.
25.
5. The optical film conforming fixture as described in claim 1, characterized in that, The first anti-slip material includes a metal component that at least partially covers the curved surface of the contour structure and has an outer surface that is away from the contour structure and has anti-slip microstructures.
6. The optical film conforming fixture as described in claim 1, characterized in that, The curved surface of the contoured structure has surface microstructures, which serve as the first anti-slip material.
7. The optical film conforming fixture as described in claim 1, characterized in that, The optical film molding fixture also includes a second anti-slip material, which is disposed on the curved surface of the molding structure. The second anti-slip material and the optical film have a third static friction coefficient, which is greater than the first static friction coefficient and different from the second static friction coefficient.
8. The optical film conforming fixture as described in claim 7, characterized in that, The first anti-slip material is disposed on the top of the curved surface of the contour structure, the second anti-slip material is disposed on the periphery of the first anti-slip material, and the second static friction coefficient is greater than the third static friction coefficient.
9. The optical film conforming fixture as described in claim 7, characterized in that, The second anti-slip material is a polymer film, a metal part with a surface microstructure, or a surface microstructure formed on the curved surface of the contour structure.