Touch screen and processing method for manufacturing touch screen into appropriate size
Through touch screen design and cutting processing methods without designing multiple sets of molds, the problem of long design cycle and high cost in the existing technology is solved, simplifying the process and reducing costs are achieved, and competitiveness and visual effects are improved.
Patent Information
- Application Number
- CN202411480034.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2025-01-10
AI Technical Summary
Customized design of existing capacitive touch screens requires the design of multiple sets of molds, resulting in long project cycles and high cost, especially for small and medium-sized projects, it is less competitive.
Using a touch screen design without designing multiple sets of molds, the touch screen is processed into a suitable size by combining flexible circuit boards and insulating layers, combined with the design of cutting lines, and using a cutting machine or laser equipment to process the touch screen into a suitable size, simplifying the process flow and reducing costs.
Shortened project cycles, reduced production costs, improved competitiveness, and enhanced visual effects through uniform metal grid design.
Smart Images
Figure CN119292488A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of touch screens, and in particular relates to a touch screen and a processing method for making the touch screen into a suitable size. Background Art
[0002] Touch technology has penetrated into all walks of life, and a large number of new technologies, new products, new applications and new models have emerged. Capacitive touch screens (touch screens) are widely used in collaborative office, consumer electronics, smart home, education and teaching, smart medical care, advertising media, automotive industrial control and other fields. Touch screens are closely related to our lives. Capacitive touch screens are currently the most widely used interactive touch solution.
[0003] Capacitive touch screens are increasingly being used in display terminal devices. For example, in the field of smart home, capacitive touch screens will become the standard for smart home appliance application terminal products. In the 5G era, home appliances will also serve as the "entrance" to smart homes. For example, smart TVs have multiple functions such as information interaction, online conferencing, office, and video, becoming multi-person interactive large-screen terminals. The touch interface opens up a new media ecosystem, human-computer interaction + home appliance interconnection, and home products become intelligent.
[0004] Capacitive touch screens (touch screens) are increasingly used, and the technology is becoming more mature. People have new requirements for the appearance of smart display terminals, such as narrow bezel design of touch screens and one-to-one customization. The touch screen is customized to the corresponding size according to the terminal device or display. For example, a 27-inch display needs to correspond to its 27-inch display window area. Designing a 27-inch touch screen can make the touch terminal device more beautiful. The customized design of the touch screen size requires the design of multiple sets of molds. The cost of opening molds is high and the cycle is long. For small and medium-sized projects, the project cost is high, the cycle is long, and the competitiveness is low. Summary of the invention
[0005] In order to overcome the deficiencies of the prior art, the present invention provides a touch screen, which does not require the design of multiple sets of molds during production, thereby shortening the project cycle and improving competitiveness.
[0006] The technical solution of the present invention is: A touch screen, comprising: Base material; Control panel; A flexible circuit board, wherein the flexible circuit board is connected to the control board; A first conductive pattern, which is located on an upper surface of the substrate, comprises: A first electrode in the visible area; A first lead in the frame area, one end of the first lead in the frame area is connected to the first electrode in the visible area in a one-to-one correspondence, and the other end of the first lead in the frame area is connected to the flexible circuit board; A first target in the frame area, wherein the first target in the frame area is located outside the first lead line in the frame area and close to the edge of the touch screen; a first insulating layer, wherein the first insulating layer is located on an upper surface of the first conductive pattern; The second conductive pattern is located on the lower surface of the substrate and includes: A second electrode in the visible area; A second lead in the frame area, one end of the second lead in the frame area is connected to the second electrode in the visible area in a one-to-one correspondence, and the other end of the second lead in the frame area is connected to the flexible circuit board; A second target in the frame area, wherein the second target in the frame area is located outside the second lead line in the frame area and close to the edge of the touch screen; A second insulating layer is located on an upper surface of the second conductive pattern.
[0007] Furthermore, the thickness of the substrate is 20-500 μm.
[0008] Furthermore, the thickness of the first conductive pattern and the second conductive pattern is 100 nm to 2000 nm.
[0009] Furthermore, the first electrode in the visible area is a uniformly distributed first metal grid, the first metal grid has a plurality of grid line intersections, and the second electrode in the visible area is a uniformly distributed second metal grid.
[0010] Furthermore, the intersection of the grid lines of the first metal grid is located at the center of the second metal grid.
[0011] Furthermore, the flexible circuit board is provided with a first binding area and a second binding area, and the first binding area and the second binding area are both hollowed out.
[0012] The present invention also provides a processing method for manufacturing the touch screen of the present invention into a suitable size, the steps are: S1. Set the cutting line, which is a reference line and is not displayed on the touch screen; S2. Adjust the parameters of the cutting machine and place the aforementioned touch screen in the device operation area; S3. Start the cutting machine to cut along the cutting line described in step S1 to shape the touch screen.
[0013] Furthermore, the cutting lines include a longitudinal cutting line and a transverse cutting line.
[0014] Furthermore, the longitudinal cutting line and the transverse cutting line are parallel to the first electrode in the visible area and the second electrode in the visible area respectively.
[0015] Compared with the prior art, 1. The touch screen can be designed with cutting lines according to the size requirements of the display screen of the terminal device and cut into the required size, with simple process and high cost performance; 2. The substrate of the present invention has flexible and bendable properties, which is convenient for cutting by cutting equipment or laser forming by laser equipment; 3. The target of the present invention has a positioning function, and the shape and size of the target can be designed according to the requirements of the cutting equipment or laser equipment; 4. The insulating layer of the present invention can protect the conductive pattern and prevent the conductive pattern from being scratched, oxidized, or corroded by external water vapor; 5. The intersection of the grid lines of the first metal grid of the present invention is located at the center of the second metal grid, which ensures the uniformity of the metal grid in the visible area of the touch screen and provides a better visual effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 is an enlarged schematic diagram of the first conductive pattern in the present invention; Figure 3 is an enlarged schematic diagram of the second conductive pattern in the present invention; Figure 4 is a schematic diagram of an embodiment of the present invention; Figure 5 The metal mesh unit of the first electrode and the second electrode in the visible area according to an embodiment of the present invention; Figure 6 for Figure 3 The enlarged schematic diagram of point A in the middle; In the figure: 10. substrate; 101. cutting line; 20. first conductive pattern; 201. first lead in the border area; 202. first electrode in the visible area; 203. first target in the border area; 21. second conductive pattern; 211. second lead in the border area; 212. second electrode in the visible area; 213. second target in the border area; 2021. first metal grid; 2121. second metal grid; 30. first insulating layer; 31. second insulating layer; 301. first binding area; 311. second binding area; 40. flexible circuit board; 50. control board. DETAILED DESCRIPTION
[0017] In order to enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention. Example
[0018] refer to Figure 1-Figure 4 A touch screen, comprising: a substrate 10; a flexible circuit board 40; a control board 50; a first conductive pattern 20, the first conductive pattern 20 is located on the upper surface of the substrate 10, and comprises: a first electrode 201 in a visible area; a first lead 202 in a frame area, one end of the first lead 202 in the frame area is connected to the first electrode 201 in a one-to-one correspondence, and the other end of the first lead 202 in the frame area is connected to the flexible circuit board 40, and the flexible circuit board 40 is connected to the control board 50; a first target 203 in the frame area, the first target 203 in the frame area is located outside the first lead 202 in the frame area, close to the edge of the touch screen; a first insulating layer 30, the first insulating layer 30 Located on the upper surface of the first conductive pattern 20; a second conductive pattern 21, the second conductive pattern 21 is located on the lower surface of the substrate 10, and includes: a second electrode 212 in the visible area; a second lead 211 in the border area, one end of the second lead 211 in the border area is connected to the second electrode 212 in the visible area in a one-to-one correspondence, and the other end of the second lead 211 in the border area is connected to the flexible circuit board 40, and the flexible circuit board 40 is connected to the control board 50; a second target 213 in the border area, the second target 213 in the border area is located on the outside of the second lead 211 in the border area, close to the edge of the touch screen; a second insulating layer 31, the second insulating layer 31 is located on the upper surface of the second conductive pattern 21.
[0019] The substrate 10 is transparent and can be one of PET (polyethylene terephthalate), PI (polyimide), CPI (colorless polyimide film), PC (polycarbonate), etc. The substrate 10 is flexible and bendable, which is convenient for cutting by cutting equipment or laser forming by laser equipment. The thickness of the substrate 10 is 20-500 μm, preferably 25-125 μm.
[0020] The first conductive pattern 20 may be one of metals such as copper, silver, tin, nickel, aluminum, or an alloy of two of them; the thickness of the metal layer of the first conductive pattern 20 is 100nm~2000nm, preferably 400~1000nm; refer to Figure 1-Figure 6 The first electrodes 202 in the visible area are a plurality of strip electrodes with equal spacing, each strip electrode is independent and insulated, and each strip electrode is composed of a metal mesh distribution; refer to Figure 5 , Figure 6 The grid line width of the metal grid is 1~8μm, and the metal grid can be square, rectangular, rhombus or regular hexagonal; the area of a single grid in the metal grid is between 0.02mm²~ 4mm²; refer to Figure 1-Figure 3The first lead wire 201 in the frame area is a single-sided wire and is all located in the frame area on the same side; one end of the first lead wire 201 in the frame area is connected to the first electrode 202 in the visible area in a one-to-one correspondence, and the other end of the first lead wire 201 in the frame area is connected to a flexible circuit board (FPC) 40, and the flexible circuit board (FPC) 40 is connected to a control board 50, and the control board 50 receives the signal in the visible area and makes feedback; refer to Figure 1-Figure 3 The first target 203 in the frame area is located outside the first lead 201 in the frame area, close to the edge of the touch screen, and has a positioning function. The shape and size of the first target 203 in the frame area can be designed according to the requirements of the cutting equipment or the laser equipment; refer to Figure 1-Figure 3 The first insulating layer 30 is located on the surface of the first conductive pattern 20 and can be realized by coating or printing. The first binding area 301 of the flexible circuit board (FPC) 40 is hollowed out and has no insulating layer. The first insulating layer 30 is mainly composed of synthetic resin. The first insulating layer 30 can be IR heat curing or UV curing insulating ink. The first insulating layer 30 can protect the first conductive pattern 20 and prevent the first conductive pattern 20 from being scratched, oxidized, corroded by external water vapor, etc. refer to Figure 1-Figure 3 , the second conductive pattern 21 is located on the lower surface of the substrate 10; the second conductive pattern 21 includes a second electrode 212 in the visible area, a second lead 211 in the frame area, and a second target 213 in the frame area; the second conductive pattern 21 can be one of the metals such as copper, silver, tin, nickel, aluminum, or an alloy of two of them; the metal layer thickness of the second conductive pattern is 100nm~2000nm, preferably 400~1000nm; refer to Figure 1-Figure 6 The second electrode 212 in the visible area is a plurality of strip electrodes with equal spacing, each strip electrode is independent and insulated, and each strip electrode is composed of a metal mesh distribution; refer to Figure 5 , Figure 6 The metal mesh has a metal wire width of 1~8μm, and the metal mesh can be square, rectangular, rhombus, regular hexagon, etc. The area of a single mesh is between 0.02mm²~ 4mm²; refer to Figure 1-Figure 3 The second lead wire 211 in the frame area is a single-sided wire and is all located in the frame area on the same side; one end of the second lead wire 211 in the frame area is connected to the second electrode 212 in the visible area in a one-to-one correspondence, and the other end of the second lead wire 211 in the frame area is connected to a flexible circuit board (FPC) 40, and the flexible circuit board (FPC) 40 is connected to a control board 50, and the control board 50 receives the signal in the visible area and makes feedback; refer to Figure 1-Figure 3The second target 213 in the frame area is located outside the second lead 211 in the frame area, close to the edge of the touch screen, and has a positioning function. The shape and size of the second target 213 in the frame area can be designed according to the requirements of the cutting equipment or the laser equipment; refer to Figure 1 The second insulating layer 31 is located on the surface of the second conductive pattern 21 and can be realized by coating or printing. The second binding area 311 of the flexible circuit board (FPC) 40 is hollow and has no insulating layer. The second insulating layer 31 is mainly composed of synthetic resin, and the second insulating layer 31 can be IR thermosetting or UV curing insulating ink. The second insulating layer 31 can protect the second conductive pattern 21 and prevent the second conductive pattern 21 from being scratched, oxidized, corroded by external water vapor, etc.
[0021] refer to Figure 5 and Figure 4 In this embodiment, the first visible area electrode 202 and the second visible area electrode 212 are both composed of uniformly distributed metal grids, and the touch control unit composed of the intersection thereof is as shown in FIG. Figure 3 , 4 As shown, in this embodiment, the metal grid is distributed in a diamond shape, the first electrode 202 in the visible area is a uniformly distributed first metal grid 2021, the second electrode 212 in the visible area is a uniformly distributed second metal grid 2121, and the grid line intersection of the diamond grid of the first metal grid 2021 is located at the center of the diamond of the second metal grid 2121, ensuring the uniformity of the metal grid in the visible area of the touch screen, so that the visual effect is better. The diamond design of the metal grid of the visible area electrode is the preferred solution of the present invention.
[0022] The present invention also provides a processing method for manufacturing the above touch screen into a suitable size, which specifically comprises the following steps: S1. Set the cutting line 101, the cutting line 101 is a reference line and is not displayed on the touch screen in real life; S2. Adjust the parameters of the cutting machine and place the aforementioned touch screen in the device operation area; S3. Start the cutting machine to cut along the cutting line 101 in step S1 to shape the touch screen.
[0023] refer to Figure 1-Figure 3, the dotted line in the figure is a cutting line 101, which is located on a side away from the first lead 201 and the second lead 211 in the frame area. The cutting line 101 is located in the gap between the first electrode 202 and the second electrode 212 in the visible area, and is parallel to the directions of the first electrode 202 and the second electrode 212 respectively; if the first electrode 202 in the visible area is longitudinal and the second electrode 212 in the visible area is transverse, then the cutting line 101 of the first conductive pattern 20 is longitudinal, and the cutting line 101 of the second conductive pattern 21 is transverse; the cutting line 101 of the first conductive pattern 20 can be positioned according to the first target 203 in the frame area, and the cutting line 101 of the second conductive pattern 20 can be positioned according to the second target 213 in the frame area, and the touch screen can be cut into a desired size by a cutting machine or a laser machine to match the display screen designed for the terminal; In actual production and processing, other touch screen forming methods can also be used for cutting, such as die cutting and forming.
[0024] The above-mentioned embodiments are described in detail and are not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the relevant art, several modifications and improvements may be made without departing from the present concept, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.
Claims
1. A touch screen, characterized in that: include: Base material; Control panel; A flexible circuit board, wherein the flexible circuit board is connected to the control board; A first conductive pattern, which is located on an upper surface of the substrate, comprises: A first electrode in the visible area; A first lead in the frame area, one end of the first lead in the frame area is connected to the first electrode in the visible area in a one-to-one correspondence, and the other end of the first lead in the frame area is connected to the flexible circuit board; A first target in the frame area, wherein the first target in the frame area is located outside the first lead line in the frame area and close to the edge of the touch screen; a first insulating layer, wherein the first insulating layer is located on an upper surface of the first conductive pattern; The second conductive pattern is located on the lower surface of the substrate and includes: A second electrode in the visible area; A second lead in the frame area, one end of the second lead in the frame area is connected to the second electrode in the visible area in a one-to-one correspondence, and the other end of the second lead in the frame area is connected to the flexible circuit board; A second target in the frame area, wherein the second target in the frame area is located outside the second lead line in the frame area and close to the edge of the touch screen; A second insulating layer is located on an upper surface of the second conductive pattern.
2. The touch screen according to claim 1, characterized in that: The thickness of the substrate is 20-500 μm.
3. The touch screen according to claim 1, characterized in that: The thickness of the first conductive pattern and the second conductive pattern is 100nm-2000nm.
4. The touch screen according to claim 1, characterized in that: The first electrode in the visible area is a uniformly distributed first metal grid, the first metal grid has a plurality of grid line intersections, and the second electrode in the visible area is a uniformly distributed second metal grid.
5. The touch screen according to claim 4, characterized in that: The intersection of the grid lines of the first metal grid is located at the center of the second metal grid.
6. The touch screen according to claim 1, characterized in that: The flexible circuit board is provided with a first binding area and a second binding area, and the first binding area and the second binding area are both hollowed out.
7. A processing method for making the touch screen of claim 1 into a suitable size, characterized in that: The processing method comprises the following steps: S1. Set the cutting line, which is a reference line and is not displayed on the touch screen; S2. Adjust the parameters of the cutting machine and place the touch screen according to claim 1 in the device operating area; S3. Start the cutting machine to cut along the cutting line described in step S1 to shape the touch screen.
8. The processing method according to claim 7, characterized in that: The cutting lines include a longitudinal cutting line and a transverse cutting line.
9. The processing method according to claim 8, characterized in that: The longitudinal cutting line and the transverse cutting line are parallel to the first electrode in the visible area and the second electrode in the visible area respectively.