Anti-glare curtain and preparation method thereof

Abstract

The present invention discloses an anti-glare screen and a method for preparing the same. The anti-glare screen comprises, from the inside out, a convex reflector array, a metal reflective layer, and an anti-glare layer composed of multiple transparent refractive layers with different refractive indices. The tops of the micron-scale raised structures of the convex reflector array are provided with nanostructures for enhancing scattering capability. The method first prepares a photoresist master; then, using the photoresist master, a convex reflector array mold is prepared; then, using the convex reflector array mold, a convex reflector array is prepared using a casting process; then, a metal reflective layer is deposited on the surface of the convex reflector array using an electrodeposition process; finally, refractive layers with different refractive indices are layered on the surface of the metal reflective layer using a coating or deposition process to form the anti-glare layer, thereby completing the preparation of the anti-glare screen. The convex reflector array with a metal reflective layer on the surface of the present invention has strong scattering and enhanced field of view imaging capabilities, is simple to prepare, is low-cost, and is suitable for large-scale production.

Description

Technical Field

[0001] The present invention belongs to the technical field of anti-glare curtains, and in particular relates to an anti-glare curtain and a preparation method thereof. Background Art

[0002] Currently, there are numerous high-gain display screens on the market. However, as the gain of the display screen gradually increases, excessive gain can lead to increased reflection intensity, resulting in glare, which in turn affects the imaging quality. To eliminate this glare effect, researchers have made significant efforts and incurred significant costs, using multiple layers of different expensive materials to achieve anti-glare by absorbing light. However, this technology has unsatisfactory anti-glare effects and suffers from problems such as a small field of view and high costs, making it difficult to commercialize. Summary of the Invention

[0003] Therefore, in response to the glare problem in the background technology, the purpose of the present invention is to provide an anti-glare screen and a preparation method thereof. First, an array similar to a convex lens structure is used to increase the field of view of the screen, and then a nano-microstructure is set on the top of the convex lens-like structure to improve the scattering effect of light. The convex reflector array and the nano-microstructure thereon are all reflected on the metal reflective layer through the deposition preparation process of the metal reflective layer. The thickness of the metal reflective layer is less than the height of the micron-level protruding structure. Therefore, the reflection effect of the convex reflector array and the nano-microstructure thereon on the incident light is all achieved through the metal reflective layer; then the present invention prepares refractive layers with different refractive indices on the metal surface, and reflects light between interfaces with different refractive indices, thereby increasing the attenuation of light and thus improving the anti-glare ability.

[0004] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0005] An anti-glare curtain, comprising:

[0006] Convex reflector arrays are manufactured in a split or integrated manner on a carrier to improve the viewing angle of the screen; the convex reflectors are all micron-sized raised structures with convex lens-like tops;

[0007] A metal reflective layer is coated or deposited on the surface of the convex reflector array to form a reflective layer with a shape similar to that of the convex reflector array, for reflecting incident light;

[0008] The anti-glare layer is a multi-layer transparent refractive layer with different refractive indices that is coated or deposited on the surface of the metal reflective layer. It uses the reflection of light between interfaces with different refractive indices to increase light attenuation and achieve an anti-glare effect.

[0009] Furthermore, the material of the convex reflector array is selected from any one of UV adhesive, PET and PMMA.

[0010] Furthermore, the filling rate of the micron-scale protrusion structure of the convex reflector array is above 70%, and can be as high as 100%.

[0011] Furthermore, the ratio of the height to the width of the micron-scale protrusion structure is less than 2.

[0012] Furthermore, the height of the micron-scale protrusion structure is 1-30 microns, and the equivalent diameter or width is 1-180 microns.

[0013] Furthermore, the material of the metal reflective layer is any one of aluminum, gold, silver, and chromium.

[0014] Furthermore, the refractive index of the transparent refractive layer increases or decreases sequentially from the inside to the outside, and the material of the transparent refractive layer is any one of UV glue and PMMA.

[0015] Furthermore, a nanostructure for improving scattering capability is provided on the spherical surface of the top of the micron-scale protruding structure, and the nanostructure is a nano-scale columnar structure or a cone-shaped structure.

[0016] Furthermore, the transparent refractive layer has 2-8 layers.

[0017] A method for preparing the above-mentioned anti-glare curtain comprises the following steps:

[0018] Step 1: According to the convex reflector array structure design, a photoresist master having a convex reflector array with a nanostructured surface is prepared on the photoresist surface by laser direct writing lithography technology;

[0019] Step 2: coating a mold material on the photoresist master of the convex reflector array, and curing the mold to obtain a convex reflector array mold;

[0020] Step 3: Using a convex reflector array mold, a carrier and the convex reflector array thereon are integrally prepared by a casting process;

[0021] Step 3: depositing a metal reflective layer on the surface of the convex reflector array using an electrodeposition process;

[0022] Step 4: A coating or deposition process is used to layer refractive layers with different refractive indices on the surface of the metal reflective layer to form an anti-glare layer, thereby completing the preparation of the anti-glare screen.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention uses transparent materials with different refractive indices to prepare an anti-glare film with a gradient refractive index. Laser direct-write lithography technology is used to prepare a photoresist master having a convex reflector array with a nano-microstructure on its surface. The structure is transferred to UV adhesive using transfer technology to prepare a convex reflector array made of UV adhesive. The surface of the convex reflector array is then coated with a metal reflective film to prepare an anti-glare film with a gradient refractive index. The present invention reduces glare by scattering light through nanostructures. At the same time, the gradient refractive index UV adhesive film eliminates glare on its surface by increasing the attenuation of reflected light. Furthermore, the present invention also increases the field of view angle through the convex reflector array, so that the field of view angle of the anti-glare screen of the present invention can reach 180°. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the anti-glare curtain structure of the present invention.

[0026] Figure 2 Schematic diagram of a single micron-scale protrusion structure in the anti-glare curtain of the present invention.

[0027] Figure 3 Schematic diagram of the low filling rate of the micron-scale protrusion structure of the convex reflector array of the present invention.

[0028] Figure 4 Schematic diagram of the high filling rate of the micron-scale protrusion structure of the convex reflector array of the present invention.

[0029] Figure 5 Schematic diagram of a photoresist master for obtaining a convex reflector array in an embodiment of the present invention.

[0030] Figure 6 Schematic diagram of a PDMS mold obtained in an embodiment of the present invention.

[0031] Figure 7 Schematic diagram of a convex reflector array obtained in an embodiment of the present invention.

[0032] Figure 8 Schematic diagram of depositing a metal reflective layer on the surface of a convex reflector array in an embodiment of the present invention.

[0033] 1-carrier, 2-micrometer-scale protruding structure, 3-nanometer microstructure, 4-photoresist master, 5-PDMS mold, 7-metal reflective layer, 8-transparent refractive layer. DETAILED DESCRIPTION

[0034] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0035] like Figures 1 to 8 As shown, an anti-glare curtain comprises:

[0036] Convex reflector array, made in a split or integrated manner on a carrier 1, is used to improve the viewing angle of the screen; the convex reflectors are all micron-level raised structures 2 with convex lens-like tops;

[0037] A metal reflective layer 7 is coated or deposited on the surface of the convex reflector array to reflect incident light;

[0038] The anti-glare layer is a multi-layer transparent refractive layer 8 with different refractive indices that is coated or deposited on the surface of the metal reflective layer 7. It uses the reflection of light between interfaces with different refractive indices to increase light attenuation and achieve an anti-glare effect.

[0039] It should be noted that the present invention has no particular restrictions on the material of the convex reflector array; any material that is low-cost and easy to manufacture can be used. The convex reflector array itself acts as a template, and ultimately a similar structure is formed on the metal reflective layer 7. Since the metal reflective layer 7 is deposited and has a thickness of only a few microns or nanometers, the structural shape of the convex reflector array is essentially proportionally reflected on the metal reflective layer 7.

[0040] Therefore, considering the processability and cost, the material of the convex reflector array of the present invention is selected from any one of UV adhesive, PET and PMMA, but is not limited to these materials.

[0041] It should be noted that the micron-scale convex structure 2 of the convex reflector array of the present invention only needs to be spherical at the top, which is a structure similar to the shape of a convex lens, and is not required to be a complete convex lens. The filling rate of the micron-scale convex structure 2 of the convex reflector array is more than 70%, and can be as high as 100%. Figure 3 As shown, the micron-scale protrusion structure 2 is in the shape of a complete convex lens. Figure 4 As shown, the micron-scale protrusion structure 2 is similar to a convex lens shape after being squeezed or cut, which can meet the requirements of the present invention.

[0042] As a preferred embodiment, the ratio of the height to width (or equivalent diameter) of the micron-scale protrusion structure 2 is less than 2. Further preferably, the micron-scale protrusion structure 2 of the present invention is a flat structure, that is, the height is smaller than the width or diameter.

[0043] As a preferred embodiment, the height of the micron-scale protrusion structure 2 is 1-30 microns, and the equivalent diameter or width is 1-180 microns. In either case, the ratio of the height to width (or equivalent diameter) of the micron-scale protrusion structure 2 must be less than 2.

[0044] As a preferred embodiment, Figure 2 and Figure 7As shown, a nanostructure 3 for improving scattering capability is provided on the spherical surface of the top of the micron-scale protrusion structure 2. The nanostructure 3 is a nanoscale columnar structure or a cone-shaped structure.

[0045] It should be noted that the nanostructure 3 is not a necessary structure. The existence of the nanostructure 3 can improve the scattering ability and indirectly improve the anti-glare performance. The basic function of the present invention is to achieve scattering through a convex reflector array, thereby improving the field of view; the nanostructure 3 can greatly improve the scattering ability, thereby achieving an anti-glare effect.

[0046] As a preferred embodiment, the height of the nanostructure 3 is 10-900 nanometers, and the equivalent diameter is 10-500 nanometers. It can be further preferred that the aspect ratio of the nanostructure 3 is 1-4, as the scattering effect of incident light is best within this aspect ratio range.

[0047] As a preferred embodiment, the nano-microstructure 3 is distributed in an array, specifically a row and column array, the array spacing is roughly equivalent to the equivalent diameter of the nano-microstructure 3, and the specific ratio of the array spacing to the equivalent diameter of the nano-microstructure 3 is between 10:1 and 1:10.

[0048] For the metal reflective layer 7, the main function is to reflect the incident light, and it reflects in the shape of a convex mirror array. Therefore, all metal materials with reflective ability and that can be prepared by deposition can be used. Considering the difficulty of preparation, the material of the metal reflective layer 7 is generally any one of aluminum, gold, silver, and chromium.

[0049] It should be noted that the thickness of the metal reflective layer 7 is in the micrometer or nanometer level.

[0050] Generally speaking, the thickness of the metal reflective layer 7 is less than the height of the micron-sized protruding structure 2. Through this setting, the reflection effect of the convex reflector array and the nano-microstructure 3 thereon on the incident light is all presented through the metal reflective layer (because the metal reflective layer 7 is made by deposition or coating, the metal reflective layer 7 can follow and form a shape similar to the convex reflector array and the nano-microstructure 3 thereon).

[0051] As a preferred embodiment, the thickness of the metal reflective layer 7 is at the nanometer level, and the thickness of the metal reflective layer 7 is roughly equivalent to the height of the nano-microstructure 3, or is smaller than the height of the nano-microstructure 3, so that the shape of the nano-microstructure can also be well reflected in the shape change of the metal reflective layer, thereby improving the scattering ability of the metal reflective layer 7 and thus improving the anti-glare effect.

[0052] More preferably, the ratio of the thickness of the metal reflective layer 7 to the height of the nano-microstructure 3 is 1:1-1:20. Within this range, the metal reflective layer 7 has the strongest ability to reflect the shape of the nano-microstructure 3.

[0053] As a preferred embodiment, the transparent refractive layer 8 has 2-8 layers, and the transparent refractive layer 8 has at least two layers. The number of layers is not limited, but too many layers will lead to excessive attenuation of reflected light and reduce brightness. Therefore, considering all factors, it is generally 2-8 layers.

[0054] It should be noted that the material of the transparent refractive layer 8 is not limited, as long as it is transparent. Each layer of the transparent refractive layer 8 can be made of the same material or different materials. Commonly used materials in the prior art include UV adhesive and PMMA. When the same material is used, if its refractive index needs to be adjustable, for example, if only UV adhesive is used, zinc sulfide can be added to adjust the refractive index.

[0055] It should be noted that, considering the refractive index of general materials and the preparation cost, the refractive index of the transparent refractive layer 8 of the present invention varies between 1.31 and 1.71. For example, in the present invention, when the transparent refractive layer 8 has three layers, the refractive indices of the three transparent refractive layers 8 can be selected as 1.4, 1.5, and 1.6, respectively. Of course, these numbers are not absolute, as long as they can generate a refractive interface.

[0056] As a preferred embodiment, the refractive index of the transparent refractive layer 8 increases or decreases sequentially from the inside to the outside. It should be noted that, generally speaking, the anti-glare effect of the refractive index decreasing sequentially from the inside to the outside is better than that of the refractive index increasing sequentially under the same other conditions.

[0057] The present invention provides a method for preparing an anti-glare curtain having a nanostructure 3, comprising the following steps:

[0058] Step 1: Figure 5 As shown, according to the convex reflector array structure design, a photoresist having a thickness greater than that of the convex reflector array structure (including the carrier 1) is prepared by spin coating the photoresist, and a photoresist master 4 having a convex reflector array with a nanostructure 3 on the surface is prepared on the photoresist surface by laser direct writing lithography technology;

[0059] Step 2: Figure 6 As shown, a PDMS material as a mold material is coated on a photoresist master 4 of a convex reflector array, and after curing, a convex reflector array mold, namely a PDMS mold 5, is obtained;

[0060] Step 3: Figure 7 As shown, a convex reflector array mold is used to integrally prepare the carrier 1 and the convex reflector array thereon by a casting process;

[0061] Specifically, the PDMS mold 5 is placed on a flat platform, UV glue is poured into the PDMS mold 5, and after it is leveled, it is cured with UV light. After demolding, a convex mirror array is obtained; of course, in order to facilitate demolding, a release agent can be pre-coated in the PDMS mold 5.

[0062] Step 4: Figure 8 As shown, a metal reflective layer 7 is deposited on the surface of the convex reflector array by using an electrodeposition process;

[0063] Specifically, the convex reflector array prepared with UV glue is cleaned and decontaminated to make its surface clean; then the cleaned convex reflector array is immersed in a metal salt solution as a cathode, a metal plate as an anode, and after connecting to a DC power supply, an electrochemical method is used to deposit the required coating, such as an aluminum film, on the surface of the convex reflector array.

[0064] Step 5: Figure 2 As shown, a transparent refractive layer 8 with different refractive indices is prepared on the surface of the metal reflective layer 7 by coating or deposition process to form an anti-glare layer, thereby completing the preparation of the anti-glare curtain.

[0065] Specifically, a layer of UV glue can be coated on the surface of the metal reflective layer 7. The refractive index of the UV glue after curing can be adjusted by adding zinc sulfide or changing the composition. After curing by ultraviolet light, a transparent refractive layer 8 is prepared. Multiple layers of transparent refractive layers 8 are prepared in the same manner, and the refractive index of the transparent refractive layer 8 increases or decreases from the inside to the outside.

[0066] The above embodiments are intended to illustrate the present invention only and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should be encompassed by the scope of the claims of the present invention.

Claims

1. An anti-glare curtain, characterized in that: include: Convex reflector arrays are manufactured in a split or integrated manner on a carrier to improve the viewing angle of the screen; the convex reflectors are all micron-sized raised structures with convex lens-like tops; A metal reflective layer is coated or deposited on the surface of the convex reflector array to reflect incident light; The anti-glare layer is a multi-layer transparent refractive layer made of materials with different refractive indices that is coated or deposited on the surface of the metal reflective layer. It uses the reflection of light between interfaces with different refractive indices to increase light attenuation and achieve an anti-glare effect. A nanostructure for improving scattering capability is provided on the spherical surface at the top of the micron-scale protruding structure. The thickness of the metal reflective layer is less than the height of the micron-scale protruding structure, so that the metal reflective layer follows and forms a shape similar to a convex reflector array and the nanostructure thereon.

2. The anti-glare screen according to claim 1, characterized in that: The material of the convex reflector array is selected from any one of UV adhesive, PET and PMMA.

3. The anti-glare screen according to claim 1, characterized in that: The filling rate of the micron-scale protrusion structure of the convex reflector array is above 70%.

4. The anti-glare screen according to claim 1, characterized in that: The ratio of the height to the width of the micron-scale protrusion structure is less than 2.

5. The anti-glare screen according to claim 1, characterized in that: The height of the micron-scale protrusion structure is 1-30 microns, and the equivalent diameter or width is 1-180 microns.

6. The anti-glare screen according to claim 1, characterized in that: The material of the metal reflective layer is any one of aluminum, gold, silver and chromium.

7. The anti-glare screen according to claim 1, characterized in that: The refractive index of the transparent refractive layer increases or decreases sequentially from the inside to the outside, and the material of the transparent refractive layer is any one of UV glue and PMMA.

8. The anti-glare screen according to any one of claims 1 to 7, characterized in that: The nanostructure is a nanoscale columnar structure or a cone structure.

9. A method for preparing the anti-glare curtain according to claim 8, characterized in that: The following steps are involved: Step 1: According to the convex reflector array structure design, a photoresist master having a convex reflector array with a nano-microstructure on the surface of the photoresist is prepared by using laser direct writing lithography technology; Step 2: coating a mold material on the photoresist master of the convex reflector array, and curing the mold to obtain a convex reflector array mold; Step 3: Using a convex reflector array mold, a carrier and the convex reflector array thereon are integrally prepared by a casting process; Step 4: depositing a metal reflective layer on the surface of the convex reflector array using an electrodeposition process; Step 5: A coating or deposition process is used to layer refractive layers with different refractive indices on the surface of the metal reflective layer to form an anti-glare layer, thereby completing the preparation of the anti-glare screen.

10. The method for preparing the anti-glare curtain according to claim 9, characterized in that: The transparent refractive layer has 2 to 8 layers.

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