Reflection-reducing wear-resistant film-coated cover plate

Abstract

The utility model relates to an anti-reflection wear-resistant coated cover plate which comprises a composite coated layer, an upper glass substrate, an anti-reflection film layer and a lower glass substrate which are stacked in sequence, the composite coating layer comprises an adhesion layer, a refraction film layer and a wear-resistant layer which are sequentially stacked, and the adhesion layer is located on the surface of the upper-layer glass substrate; the upper glass substrate is bonded with the antireflection film layer through the solid optical adhesive layer; a microstructure is arranged on the surface of the lower-layer glass substrate and is used for reducing the reflectivity; and the antireflection film layer is arranged on the microstructure. The anti-reflection effect is improved through the composite coating layer, the two layers of glass substrates are arranged, on one hand, a microstructure can be conveniently arranged on the surface of the lower layer glass, glass surface reflection is further reduced, glare is reduced, on the other hand, the display screen is further protected through the lower layer glass, and the display effect is improved. And the stability of the display screen structure and the use safety are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of display, in particular to a reflection-reducing and wear-resistant coating cover plate. Background Art

[0002] Currently, the functional requirements for glass cover plates are increasing day by day. Traditional glass cover plates can no longer meet the comprehensive requirements of modern electronic equipment and optical instruments for high light transmittance, low reflection, high hardness and good processing performance.

[0003] In the prior art, there are some solutions that achieve the purpose of improving optical performance by providing a coating layer structure on the glass cover plate. However, there are also some defects that prevent large-scale production and application. These include excessive number of coating layers resulting in poor consistency in the final optical properties of the product, poor adhesion and stability of the coating layer, cumbersome processing procedures, and poor impact resistance of the cover plate. Utility Model Content

[0004] In view of the deficiencies of the prior art, the present invention provides a reflective reduction and wear-resistant coating cover plate, the purpose of which is to improve the anti-reflective optical performance and mechanical performance of the cover plate.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] A reflective and wear-resistant coating cover plate, comprising a composite coating layer, an upper glass substrate, an anti-reflection film layer and a lower glass substrate stacked in sequence;

[0007] The composite coating layer comprises an adhesive layer, a refractive film layer and a wear-resistant layer stacked in sequence, and the adhesive layer is located on the surface of the upper glass substrate;

[0008] The upper glass substrate is bonded to the antireflection film layer via a solid optical adhesive layer;

[0009] The surface of the lower glass substrate is provided with a microstructure, and the microstructure is used to reduce reflectivity;

[0010] The antireflection film layer is arranged on the microstructure.

[0011] Further technical solutions are:

[0012] The average transmittance of the antireflection film layer in the 400-1100 nm wavelength range exceeds 99%.

[0013] The antireflection film layer is an aluminum oxide film layer with a thickness of 50 to 60 nanometers.

[0014] The microstructure is formed on the surface of the lower glass substrate by an etching method; the thickness of the microstructure is 1 to 2 microns.

[0015] The adhesion layer is a sodium fluoride film layer with a thickness of 20 to 50 nanometers.

[0016] The refractive film layer is a samarium fluoride film layer, and its thickness is 50 to 100 nanometers.

[0017] The wear-resistant layer is a strontium fluoride film layer with a thickness of 30 to 80 nanometers.

[0018] The thickness of the upper glass substrate is 1.1 to 2 mm.

[0019] The thickness of the lower glass substrate is 1.1 to 2 mm.

[0020] The thickness of the solid optical adhesive layer is 20 to 25 microns.

[0021] The beneficial effects of the utility model are as follows:

[0022] The utility model meets the modern industry's demand for high performance and multifunctional glass cover plates, improves optical performance, wear resistance and processing convenience, and has the following specific advantages:

[0023] This new composite coating, based on sodium fluoride, samarium fluoride, and strontium fluoride, enhances both antireflection and mechanical properties, maximizing the functional benefits of each layer. The composite coating can be formed using a precision coating process, offering convenient operation and a stable structure. The overall performance can be further optimized by finely controlling the thickness of each layer.

[0024] This utility model utilizes two glass substrates. This facilitates the placement of microstructures on the lower glass surface, further reducing surface reflections and glare. Furthermore, the lower glass provides additional protection, ensuring that even if the upper glass substrate is damaged, the lower glass still protects the display module, enhancing its safety and security. The two layers of glass are bonded together using solid-state optical adhesive, ensuring transmittance while enhancing structural stability. An antireflection coating placed between the two layers further enhances the antireflection effect.

[0025] Other features and advantages of the present invention will be described in the following description or will be understood through implementation of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the stacking structure of an embodiment of the present utility model.

[0027] Figure 2 for Figure 1 Enlarged view of part A in the middle.

[0028] In the figure: 1. wear-resistant layer; 2. refractive film layer; 3. adhesion layer; 4. upper glass substrate; 5. solid optical adhesive layer; 6. anti-reflection film layer; 7. lower glass substrate; 701. microstructure. DETAILED DESCRIPTION

[0029] The specific implementation of the present utility model is described below with reference to the accompanying drawings.

[0030] See also Figure 1 and Figure 2 The anti-reflection wear-resistant coating cover plate of this embodiment includes a composite coating layer, an upper glass substrate 4, an anti-reflection film layer 6 and a lower glass substrate 7 stacked in sequence;

[0031] The composite coating layer comprises an adhesive layer 3, a refractive film layer 2 and a wear-resistant layer 1 stacked in sequence, and the adhesive layer 3 is located on the surface of the upper glass substrate 4;

[0032] The upper glass substrate 4 is bonded to the anti-reflection film layer 6 via a solid optical adhesive layer 5;

[0033] The surface of the lower glass substrate 7 is provided with a microstructure 701, and the microstructure 701 is used to reduce the reflectivity;

[0034] The antireflection film layer 6 is disposed on the microstructure 701 .

[0035] As a specific embodiment, the average transmittance of the antireflection film layer 6 in the 400-1100 nm wavelength range exceeds 99%. Preferably, the antireflection film layer 6 is an aluminum oxide film layer with a thickness of 50-60 nm.

[0036] Specifically, the antireflection film layer 6 is prepared using existing processes, such as sputtering coating: in a vacuum chamber, high-energy particles (such as argon ions) bombard an aluminum or aluminum oxide target material, sputtering atoms from the target material and depositing them on the glass surface to form an aluminum oxide film layer. Alternatively, evaporation coating: the aluminum or aluminum oxide material is heated to a high temperature, evaporating it into a gaseous state. In a vacuum environment, the evaporated aluminum or aluminum oxide atoms fly toward the glass substrate and deposit on its surface to form a film layer. The evaporation of the material can be achieved using methods such as resistance heating and electron beam heating.

[0037] As a specific embodiment, the microstructure 701 is formed on the surface of the lower glass substrate 7 by etching. Preferably, the thickness of the microstructure 701 is 1 to 2 micrometers.

[0038] The microstructure formed by etching has an uneven surface that reduces the reflectivity of the glass surface, thereby reducing glare. In addition, because the microstructure is located on the surface of the lower glass substrate and is a certain distance away from the upper glass surface, it does not affect clarity.

[0039] In this embodiment, the upper and lower glass substrates are fully bonded together by a solid optical adhesive layer 5. This layer not only secures the connection, making the structure more stable, but also maintains light transmittance. To enhance the anti-reflection effect, an anti-reflection coating layer 6, preferably an aluminum oxide film, is placed between the upper and lower glass panels. This "broadband anti-reflection coating" achieves an average transmittance exceeding 99% in the 400-1100nm band through optimized thickness design, significantly improving light transmittance compared to the over 94% transmittance of ordinary glass slow plates.

[0040] As a specific embodiment, the adhesion layer 3 is a sodium fluoride film layer with a thickness of 20 to 50 nanometers. As a base layer, sodium fluoride (NaF) has certain adhesion and chemical stability, which helps the adhesion of subsequent coating layers and the durability of the entire coating layer.

[0041] In a specific embodiment, the refractive coating layer 2 is a samarium fluoride film layer with a thickness of 50 to 100 nanometers. As an intermediate layer, samarium fluoride (SmF3) exhibits excellent anti-reflection properties. The refractive index of the entire composite coating layer can be adjusted to optimize the anti-reflection effect by adjusting parameters such as thickness. Furthermore, samarium fluoride exhibits excellent chemical stability and weather resistance, enhancing the overall durability of the coating layer.

[0042] As a specific embodiment, the wear-resistant layer 1 is a strontium fluoride film layer with a thickness of 30 to 80 nanometers. Strontium fluoride (SrF2) is known for its high hardness and wear resistance. As a surface layer, it can significantly improve the scratch resistance and wear resistance of the coating layer.

[0043] Specifically, each coating layer can be prepared by a magnetron sputtering process.

[0044] The layered structural design of the composite coating layer of this embodiment not only maximizes the utilization of the functions of each layer of materials, but also further optimizes the overall performance of the coating layer by finely controlling the thickness of each layer, thereby meeting the high-performance and multi-functional requirements of the glass cover in different modern industrial application scenarios.

[0045] As a specific embodiment, the thickness of the upper glass substrate 4 is 1.1 to 2 mm.

[0046] As a specific embodiment, the thickness of the lower glass substrate 7 is 1.1 to 2 mm.

[0047] As a specific embodiment, the thickness of the solid optical adhesive layer 5 is 20 to 25 micrometers.

[0048] The anti-reflective wear-resistant coated cover plate of this embodiment can be combined with a display screen or a touch screen to form a display module, which can be used in various devices with display functions, such as mobile phones, tablet computers, and car displays.

[0049] Those skilled in the art will understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A reflective and wear-resistant coating cover plate, characterized in that: It comprises a composite coating layer, an upper glass substrate (4), an anti-reflection film layer (6) and a lower glass substrate (7) stacked in sequence; The composite coating layer comprises an adhesive layer (3), a refractive film layer (2), and a wear-resistant layer (1) stacked in sequence, and the adhesive layer (3) is located on the surface of the upper glass substrate (4); The upper glass substrate (4) is bonded to the anti-reflection film layer (6) via a solid optical adhesive layer (5); A microstructure (701) is provided on the surface of the lower glass substrate (7), and the microstructure (701) is used to reduce reflectivity; The antireflection film layer (6) is arranged on the microstructure (701).

2. The anti-reflection wear-resistant coated cover plate according to claim 1, characterized in that: The average transmittance of the antireflection film layer (6) in the 400-1100 nm wavelength range exceeds 99%.

3. The anti-reflection wear-resistant coated cover plate according to claim 1, characterized in that: The antireflection film layer (6) is an aluminum oxide film layer, and its thickness is 50 to 60 nanometers.

4. The anti-reflection wear-resistant coated cover plate according to claim 1, characterized in that: The microstructure (701) is formed on the surface of the lower glass substrate (7) by an etching method; the thickness of the microstructure (701) is 1 to 2 micrometers.

5. The anti-reflection wear-resistant coated cover plate according to claim 1, characterized in that: The adhesion layer (3) is a sodium fluoride film layer with a thickness of 20 to 50 nanometers.

6. The anti-reflection wear-resistant coated cover plate according to claim 1, characterized in that: The refractive film layer (2) is a samarium fluoride film layer, and its thickness is 50 to 100 nanometers.

7. The anti-reflection wear-resistant coated cover plate according to claim 1, characterized in that: The wear-resistant layer (1) is a strontium fluoride film layer, and its thickness is 30 to 80 nanometers.

8. The anti-reflection wear-resistant coated cover plate according to claim 1, characterized in that: The thickness of the upper glass substrate (4) is 1.1 to 2 millimeters.

9. The anti-reflection wear-resistant coated cover plate according to claim 1, characterized in that: The thickness of the lower glass substrate (7) is 1.1 to 2 millimeters.

10. The anti-reflection wear-resistant coated cover plate according to claim 1, characterized in that: The thickness of the solid optical adhesive layer (5) is 20 to 25 micrometers.

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