Protection method for touch circuit

Abstract

The invention discloses a protection method for a touch circuit, which comprises the following steps of: coating a layer of protection film on the surface of the touch circuit of a protection panel, and adding an electrical isolation layer between the protection film and the touch circuit, wherein the special insulating film is prepared in the modes of polymerization, film casting, drying and cutting, the preparation raw material is polyimide, the special insulating film is in a liquid state and is poured on the flat protective panel to form a solution with a certain concentration, the solution is uniformly spread by a roller of a film casting machine or a smooth workbench to form a thin film, and the thin film is placed on the protective panel. Along with volatilization of the solvent, the solution is gradually cured to form a film which passes through a uniform thin film, then drying treatment is carried out to remove the solvent, and finally the film is cut into the required size. According to the protection method for the touch circuit, the surface of the touch circuit is coated with the protection film and the electrical isolation layer, physical damage such as scraping and impacting can be effectively prevented, and therefore the durability of the touch circuit is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of touch circuit protection, and in particular to a protection method for a touch circuit. Background Art

[0002] Touch circuits are susceptible to physical damage, electrical interference, and environmental impacts during production and use, which may reduce the performance of the touch screen and shorten its service life; Existing touch circuit protection methods mainly include using protective films and protective panels to cover the touch circuits to prevent direct contact and physical damage. However, these traditional protection methods have some limitations. For example, the protective film may not be able to completely resist strong physical impacts, and the protective panel may affect the response speed and sensitivity of the touch screen due to the increased thickness. In addition, touch lines may be affected by high temperature, chemicals and mechanical stress during the manufacturing process, causing line damage or performance degradation. Therefore, a more effective protection method is needed to improve the durability and reliability of touch lines. The current technology still has the problem of insufficient application of electrical isolation layer, which makes the touch line prone to short circuit or leakage when subjected to electrical interference. In addition, the thickness and material selection of the protective film will also affect the protection effect and the overall performance of the touch screen. Therefore, it is necessary to develop a new touch line protection method that can provide better physical protection, electrical isolation, and environmental adaptability without affecting the sensitivity and response speed of the touch screen. Summary of the invention

[0003] The object of the present invention is to provide a protection method for a touch circuit to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a protection method for a touch circuit, comprising: Providing a protective panel; A protective film is coated on the surface of the touch circuit of the protection panel, and an electrical isolation layer is added between the protective film and the touch circuit, including: the material of the electrical isolation layer is a special insulating film, wherein the special insulating film needs to be prepared by polymerization, film casting, drying and cutting, and the raw material for preparation is polyimide, the special insulating film is poured on the flat protection panel in a liquid state to form a solution of a certain concentration, and the roller of the film casting machine or the smooth workbench makes the solution evenly spread to form a film, and as the solvent evaporates, the solution gradually solidifies into a uniform film, and then a drying process is performed to remove the solvent, and finally cut into a desired size; The raw materials of the protective film are polyester film and glass fiber. The protective film is a grid-shaped film layer. The protective film is evenly coated on the surface of the protective panel by a coater. The touch circuit coated with the protective film is placed in an oven to solidify the protective film. An electrical isolation layer is evenly applied between the protective film and the touch circuit by roller coating. The material layer is separated into multiple 50-micron thick protective panels by cutting.

[0005] As a preferred technical solution of the present invention, the thickness of the protective film is greater than or equal to 1 micron and less than or equal to 50 microns.

[0006] As a preferred technical solution of the present invention, the cutting speed of the protective film is set to 2-3 meters / minute.

[0007] As a preferred technical solution of the present invention, the coating thickness of the protective film is controlled at 20-30 microns.

[0008] A method for preparing a protective panel for a touch circuit comprises the following steps: 1. Choose a glass or plastic panel of appropriate thickness, such as 0.7mm thick tempered glass or 1mm thick acrylic panel, and customize the size of the panel according to the size of the touch screen.

[0009] 2. The material for coating the protective film is a mixed material of polyester film and glass fiber, the thickness of the material is 20-30 microns, and the shape of the material is a grid shape. Use a coating machine to evenly coat the polyester film and glass fiber mixed material on the protective panel, put the coated panel into an oven, set the temperature to 60-100°C, and dry it for 30-60 minutes until the protective film is cured; 3. The material of the electrical isolation layer is polyimide solution. Dissolve the polyimide in an appropriate solvent to form a solution of a certain concentration. Pour the solution into a film casting machine. Use the roller of the film casting machine or a smooth workbench to evenly spread the solution to form a film. Put the film into an oven with a set temperature of 60-100°C and a drying time of 30-60 minutes until the solvent is completely volatilized and the film is solidified. Cut the solidified film into the required size. 4. The thickness of the electrical isolation layer is 50 microns. Use a roller coater to evenly coat the polyimide film on the protective film. Put the coated panel into an oven with a set temperature of 60-100°C and a drying time of 30-60 minutes until the electrical isolation layer is cured. 5. Use a laser cutting machine or mechanical cutting equipment to cut the protective panel coated with the protective film and the electrical isolation layer into multiple independent panels with a thickness of 50 microns; 6. After cutting, the protective panel shall be inspected for appearance to ensure that there are no bubbles, cracks or wrinkles. Electrical performance tests such as insulation resistance test and voltage withstand test shall be carried out to ensure that the design requirements are met.

[0010] Compared with the prior art, the protection method for touch circuits of the present invention has the following beneficial effects: By coating a protective film and an electrical isolation layer on the surface of the touch circuit, physical damage such as scratches and impacts can be effectively prevented, thereby improving the durability of the touch circuit. The electrical isolation layer can effectively isolate external electric field interference and prevent the touch circuit from short circuiting or leaking due to electrical interference, thereby improving the reliability of the touch circuit. By controlling the thickness and material of the protective film and the electrical isolation layer, effective protection can be provided for the touch circuit without affecting the sensitivity and response speed of the touch screen. Polyimide is used as the electrical isolation layer material, which has excellent processing performance and can quickly perform polymerization, film casting, drying and cutting steps, thereby improving production efficiency. The price of polyimide materials is relatively low, and the processing technology is simple, which can reduce production costs. The touch circuit protection method is suitable for touch screens of various sizes and types, and has good versatility and adaptability. By providing more reliable touch circuit protection, the market competitiveness and user satisfaction of the product can be improved. DETAILED DESCRIPTION Example

[0011] The present invention provides a technical solution: a protection method for a touch circuit, comprising: Providing a protective panel; A protective film is coated on the surface of the touch circuit of the protection panel, and an electrical isolation layer is added between the protective film and the touch circuit, including: the material of the electrical isolation layer is a special insulating film, wherein the special insulating film needs to be prepared by polymerization, film casting, drying and cutting, and the raw material for preparation is polyimide, the special insulating film is poured on the flat protection panel in a liquid state to form a solution of a certain concentration, and the roller of the film casting machine or the smooth workbench makes the solution evenly spread to form a film, and as the solvent evaporates, the solution gradually solidifies into a uniform film, and then a drying process is performed to remove the solvent, and finally cut into a desired size; The raw materials of the protective film are polyester film and glass fiber. The protective film is a grid-shaped film layer. The protective film is evenly coated on the surface of the protective panel by a coater. The touch circuit coated with the protective film is placed in an oven to solidify the protective film. An electrical isolation layer is evenly applied between the protective film and the touch circuit by roller coating. The material layer is separated into multiple 50-micron thick protective panels by cutting. The thickness of the protective film is greater than or equal to 1 micron and less than or equal to 50 microns. The thickness of the protective film is greater than or equal to 1 micron and less than or equal to 50 microns.

[0012] The size of the protective panel: 10 inches; Protective film material: 20 micron thick polyester film and glass fiber mixed material, grid shape; Electrical isolation layer material: 50 micron thick polyimide film; Electrical isolation layer coating method: roller coating; Curing temperature and time: 80°C, 40 minutes; Cutting thickness: 50 microns; Quality inspection: no bubbles, cracks and wrinkles, insulation resistance greater than 10^12 ohms, withstand voltage greater than 300V. Example

[0013] The present invention provides a technical solution: a protection method for a touch circuit, comprising: Providing a protective panel; A protective film is coated on the surface of the touch circuit of the protection panel, and an electrical isolation layer is added between the protective film and the touch circuit, including: the material of the electrical isolation layer is a special insulating film, wherein the special insulating film needs to be prepared by polymerization, film casting, drying and cutting, and the raw material for preparation is polyimide, the special insulating film is poured on the flat protection panel in a liquid state to form a solution of a certain concentration, and the roller of the film casting machine or the smooth workbench makes the solution evenly spread to form a film, and as the solvent evaporates, the solution gradually solidifies into a uniform film, and then a drying process is performed to remove the solvent, and finally cut into a desired size; The raw materials of the protective film are polyester film and glass fiber. The protective film is a grid-shaped film layer. The protective film is evenly coated on the surface of the protective panel by a coater. The touch circuit coated with the protective film is placed in an oven to solidify the protective film. An electrical isolation layer is evenly applied between the protective film and the touch circuit by roller coating. The material layer is separated into multiple 50-micron thick protective panels by cutting. The thickness of the protective film is greater than or equal to 1 micron and less than or equal to 50 microns. The thickness of the protective film is greater than or equal to 1 micron and less than or equal to 50 microns.

[0014] Protection panel size: 15 inches; Protective film material: 30 micron thick polyester film and glass fiber mixed material, grid shape; Electrical isolation layer material: 40 micron thick polyimide film; Electrical isolation layer coating method: spraying; Curing temperature and time: 90°C, 50 minutes; Cutting thickness: 50 microns; Quality inspection: no bubbles, cracks and wrinkles, insulation resistance greater than 10^13 ohms, withstand voltage greater than 400V. Example

[0015] The present invention provides a technical solution: a protection method for a touch circuit, comprising: Providing a protective panel; A protective film is coated on the surface of the touch circuit of the protection panel, and an electrical isolation layer is added between the protective film and the touch circuit, including: the material of the electrical isolation layer is a special insulating film, wherein the special insulating film needs to be prepared by polymerization, film casting, drying and cutting, and the raw material for preparation is polyimide, the special insulating film is poured on the flat protection panel in a liquid state to form a solution of a certain concentration, and the roller of the film casting machine or the smooth workbench makes the solution evenly spread to form a film, and as the solvent evaporates, the solution gradually solidifies into a uniform film, and then a drying process is performed to remove the solvent, and finally cut into a desired size; The raw materials of the protective film are polyester film and glass fiber. The protective film is a grid-shaped film layer. The protective film is evenly coated on the surface of the protective panel by a coater. The touch circuit coated with the protective film is placed in an oven to solidify the protective film. An electrical isolation layer is evenly applied between the protective film and the touch circuit by roller coating. The material layer is separated into multiple 50-micron thick protective panels by cutting. The thickness of the protective film is greater than or equal to 1 micron and less than or equal to 50 microns. The thickness of the protective film is greater than or equal to 1 micron and less than or equal to 50 microns.

[0016] Protection panel size: 20 inches; Protective film material: 25 micron thick polyester film and glass fiber mixed material, grid shape; Electrical isolation layer material: 60 micron thick polyimide film; Electrical isolation layer coating method: dip coating; Curing temperature and time: 100°C, 60 minutes; Cutting thickness: 50 microns; Quality inspection: no bubbles, cracks and wrinkles, insulation resistance greater than 10^14 ohms, withstand voltage greater than 500V; In the above embodiment, according to different touch screen sizes and performance requirements, select the appropriate protective panel size, protective film and electrical isolation layer materials, coating method and curing conditions. The cut protective panel is tested for appearance and electrical performance to ensure that it meets the design requirements.

Claims

1. A protection method for a touch circuit, characterized in that: include: Providing a protective panel; A protective film is coated on the surface of the touch circuit of the protection panel, and an electrical isolation layer is added between the protective film and the touch circuit, including: the material of the electrical isolation layer is a special insulating film, wherein the special insulating film needs to be prepared by polymerization, film casting, drying and cutting, and the raw material for preparation is polyimide, the special insulating film is poured on the flat protection panel in a liquid state to form a solution of a certain concentration, and the roller of the film casting machine or the smooth workbench makes the solution evenly spread to form a film, and as the solvent evaporates, the solution gradually solidifies into a uniform film, and then a drying process is performed to remove the solvent, and finally cut into a desired size; The raw materials of the protective film are polyester film and glass fiber. The protective film is a grid-shaped film layer. The protective film is evenly coated on the surface of the protective panel by a coater. The touch circuit coated with the protective film is placed in an oven to solidify the protective film. An electrical isolation layer is evenly applied between the protective film and the touch circuit by roller coating. The material layer is separated into multiple 50-micron thick protective panels by cutting.

2. A method for protecting a touch circuit according to claim 1, characterized in that: The thickness of the protective film is greater than or equal to 1 micrometer and less than or equal to 50 micrometers.

3. A method for protecting a touch circuit according to claim 1, characterized in that: The cutting speed of the protective film is set at 2-3 m / min.

4. A method for protecting a touch circuit according to claim 1, characterized in that: The coating thickness of the protective film is controlled at 20-30 microns.