A coated cover plate, touch screen device

Abstract

The application discloses a coated cover plate, comprising a glass substrate, an upper coating layer arranged on the front surface of the glass substrate, and a lower coating layer arranged on the lower surface of the viewing area of the back surface of the glass substrate; a photosensitive color-changing composite layer is arranged along the periphery of the lower coating layer; the upper coating layer comprises four layers of chromium carbide layers and nickel-aluminum layers which are alternately stacked in sequence, and the stacking sequence is as follows: a chromium carbide layer, a nickel-aluminum layer, a chromium carbide layer, and a nickel-aluminum layer; the lower coating layer comprises a polyvinylidene fluoride layer which is attached to the glass substrate, and an indium tin oxide layer which is arranged on the side of the polyvinylidene fluoride layer away from the glass substrate; the photosensitive color-changing composite layer comprises a photosensitive color-changing ink layer and an aluminum protective layer which covers the photosensitive color-changing ink layer. The application has the innovative structure of the alternately stacked hard coating layer, the integrated touch function layer, and the dynamic light response protective layer, and significantly improves the comprehensive protection performance and functionality of the cover plate, and is suitable for screen protection and touch interaction scenes of high-end electronic equipment.

Description

Technical Field

[0001] This invention belongs to the field of electronic device protection, specifically relating to a coated cover plate and a touch screen device using the coated cover plate. Background Technology

[0002] With the widespread use of electronic devices (such as smartphones, tablets, and wearable devices), their screen covers need to simultaneously meet requirements such as high-strength protection, touch sensitivity, and aesthetics. Existing technologies, such as traditional screen covers, suffer from the following technical shortcomings:

[0003] Insufficient mechanical protection: Ordinary cover plates mostly use single-layer or simple multilayer coatings (such as aluminum oxide, silicon nitride), which have limited hardness and impact resistance, making it difficult to resist frequent friction or drop impacts, resulting in easy scratches or cracks in the cover plates.

[0004] Integration of touch functionality and protective layer is difficult: Existing touch cover plates usually have a separate touch electrode layer on the glass substrate, which leads to complex structure, increased thickness, and the touch layer is easily damaged by external impact.

[0005] Lack of dynamic protection function: Existing covers lack the ability to dynamically respond to environmental factors such as light and temperature, and cannot provide early warning of potential risks through visual changes (such as material aging caused by long-term exposure to strong light).

[0006] Weak interfacial adhesion: The interfacial adhesion strength between different coating layers is insufficient, and it is easy to delaminate under high temperature and humidity or mechanical stress, affecting the overall stability of the cover plate. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a coated cover plate and touch screen device that can improve the protective performance of the cover plate.

[0008] To solve the above-mentioned technical problems, the technical method adopted by the present invention is as follows: The present invention discloses a coated cover plate, including a glass substrate, an upper coating layer disposed on the front side of the glass substrate, and a lower coating layer disposed on the lower surface of the back viewing area of ​​the glass substrate; a photosensitive color-changing composite layer is provided along the periphery of the lower coating layer;

[0009] The upper coating layer includes four alternating layers of chromium carbide and nickel aluminum, stacked in the following order: chromium carbide, nickel aluminum, chromium carbide and nickel aluminum.

[0010] The lower coating layer includes a polyvinylidene fluoride layer bonded to a glass substrate and an indium tin oxide layer disposed on the side of the polyvinylidene fluoride layer away from the glass substrate.

[0011] The photosensitive color-changing composite layer includes a photosensitive color-changing ink layer and an aluminum protective layer covering it.

[0012] Furthermore, the thickness of a single chromium carbide layer is 10-15 nanometers.

[0013] Furthermore, the single-layer thickness of the nickel-aluminum trilayer is 5-10 nanometers, and the total thickness of the four alternately stacked layers is 30-50 nanometers.

[0014] Furthermore, the thickness of the single layer of chromium carbide is 12 nanometers.

[0015] Furthermore, the single-layer thickness of the nickel-aluminum trilayer is 8 nanometers.

[0016] Furthermore, the thickness of the photosensitive color-changing ink layer is 8-12 micrometers, and the thickness of the aluminum protective layer is 100-200 nanometers.

[0017] Furthermore, the photosensitive color-changing ink layer contains micron-sized silica particles with a particle size of 1-3 microns.

[0018] Furthermore, the thickness of the polyvinylidene fluoride layer is 8-12 micrometers, and the thickness of the indium tin oxide layer is 100-200 nanometers.

[0019] Furthermore, the surface of the indium tin oxide layer is provided with periodically arranged microgroove structures, the depth of which is 50-80 nanometers and the width of which is 100-150 nanometers.

[0020] The present invention also discloses a touch screen device, including a coated cover plate using any of the above-described methods, and a touch electrode array disposed beneath an indium tin oxide layer of the coated cover plate. Beneficial effects

[0021] 1. Compared with the prior art, the present invention provides excellent hardness and wear resistance by alternately stacking chromium carbide layers and nickel-aluminum layers in the upper coating layer, preventing scratches and wear on the cover plate surface.

[0022] 2. The combination of the polyvinylidene fluoride layer and the indium tin oxide layer in the lower coating layer not only provides good mechanical protection, but also has transparent conductivity and supports touch functionality.

[0023] 3. The photosensitive color-changing ink layer can change color according to changes in light, providing a dynamic visual effect and increasing the product's interest and aesthetics. Compared with the prior art, the multifunctional film layer structure design of the present invention simplifies the production process and reduces manufacturing costs. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall coating cover plate in this invention;

[0025] Figure 2 This is a partial cross-sectional schematic diagram of the coated cover plate in this invention. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] Example 1: Coated cover plate

[0028] A coated cover plate includes a glass substrate 1, an upper coating layer 2 disposed on the front side of the glass substrate 1, and a lower coating layer 3 disposed on the lower surface of the rear viewing area of ​​the glass substrate 1. A photosensitive color-changing composite layer 4 is disposed around the periphery of the lower coating layer 3. The upper coating layer 2 consists of four alternately stacked chromium carbide layers 21 and nickel-aluminum layers 22, in the stacking order of chromium carbide layer 21, nickel-aluminum layer 22, chromium carbide layer 21, and nickel-aluminum layer 22. The lower coating layer 3 includes a polyvinylidene fluoride layer 31 bonded to the glass substrate 1, and an indium tin oxide layer 32 disposed on the side of the polyvinylidene fluoride layer 31 away from the glass substrate 1. The photosensitive color-changing composite layer 4 consists of a photosensitive color-changing ink layer 41 and an aluminum protective layer 42 covering it.

[0029] Preferably, the chromium carbide layer 21 has a single-layer thickness of 10-15 nanometers, the nickel-aluminum layer 22 has a single-layer thickness of 5-10 nanometers, and the total thickness of the four alternately stacked layers is 30-50 nanometers. The photosensitive color-changing ink layer 41 has a thickness of 8-12 micrometers, and the aluminum protective layer 42 has a thickness of 100-200 nanometers. The photosensitive color-changing ink layer 41 contains micron-sized silica particles 303 with a particle size of 1-3 micrometers. The polyvinylidene fluoride layer 31 has a thickness of 8-12 micrometers, and the indium tin oxide layer 32 has a thickness of 100-200 nanometers. The surface of the indium tin oxide layer 32 is provided with periodically arranged microgroove structures, the depth of which is 50-80 nanometers and the width of which is 100-150 nanometers.

[0030] Compared to existing designs, this solution provides superior hardness and wear resistance by alternately stacking chromium carbide and nickel-aluminum layers in the upper coating layer 2, preventing scratches and wear on the cover surface. The combination of polyvinylidene fluoride and indium tin oxide layers in the lower coating layer 3 not only provides good mechanical protection but also has transparent conductivity, supporting touch functionality. The photosensitive color-changing composite layer 4 can change color according to changes in light, providing a dynamic visual effect and increasing the product's interest and aesthetics.

[0031] Example 2: Touchscreen Device

[0032] Coated cover plate: The coated cover plate described in Example 1 is used, and a touch electrode array is provided below the indium tin oxide layer 32 of the coated cover plate.

[0033] Preferably, the touch electrode array includes a first conductive grid and a second conductive grid.

[0034] When a user touches the screen, the polyvinylidene fluoride layer 31 is compressed, resulting in a change in charge, which is then transferred to the touch electrode array through the indium tin oxide layer 32.

[0035] The system uses a conductive grid to detect changes in charge distribution, and the controller calculates the touch position and force, supporting multi-touch.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A coated cover plate, characterized in that: It includes a glass substrate (1), an upper coating layer (2) disposed on the front side of the glass substrate (1), and a lower coating layer (3) disposed on the lower surface of the back view area of ​​the glass substrate (1); a photosensitive color-changing composite layer (4) is provided around the lower coating layer (3). The upper coating layer (2) includes four alternating stacked chromium carbide layers (21) and nickel aluminum layers (22), with the stacking order being chromium carbide layer (21), nickel aluminum layer (22), chromium carbide layer (21) and nickel aluminum layer (22). The lower coating layer (3) includes a polyvinylidene fluoride layer (31) bonded to the glass substrate (1) and an indium tin oxide layer (32) disposed on the side of the polyvinylidene fluoride layer (31) away from the glass substrate (1). The photosensitive color-changing composite layer (4) includes a photosensitive color-changing ink layer (41) and an aluminum protective layer (42) covering it.

2. The coated cover plate according to claim 1, characterized in that: The thickness of a single layer of the chromium carbide layer (21) is 10-15 nanometers.

3. The coated cover plate according to claim 1 or 2, characterized in that: The single-layer thickness of the nickel-aluminum trilayer (22) is 5-10 nanometers, and the total thickness of the four alternately stacked layers is 30-50 nanometers.

4. The coated cover plate according to claim 2, characterized in that: The thickness of a single layer of the chromium carbide layer (21) is 12 nanometers.

5. The coated cover plate according to claim 3, characterized in that: The single-layer thickness of the nickel-aluminum layer (22) is 8 nanometers.

6. The coated cover plate according to claim 1, characterized in that: The thickness of the photosensitive color-changing ink layer (41) is 8-12 micrometers, and the thickness of the aluminum protective layer (42) is 100-200 nanometers.

7. The coated cover plate according to claim 1, characterized in that: The thickness of the polyvinylidene fluoride layer (31) is 8-12 micrometers, and the thickness of the indium tin oxide layer (32) is 100-200 nanometers.

8. The coated cover plate according to claim 7, characterized in that: The surface of the indium tin oxide layer (32) is provided with a periodically arranged microgroove structure, the depth of which is 50-80 nanometers and the width of which is 100-150 nanometers.

9. A touch screen device, characterized in that: It includes the coated cover plate as described in any one of claims 1-8, and the touch electrode array disposed below the indium tin oxide layer (32) of the coated cover plate.

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