CN215068192U

CN215068192U - Capacitive touch screen

Info

Publication number: CN215068192U
Application number: CN202023230875.0U
Authority: CN
Inventors: 周威云; 景伦斌; 李计考; 宋小来; 王士敏; 朱泽力
Original assignee: Shenzhen Laibao Hi Tech Co Ltd
Current assignee: Shenzhen Laibao Hi Tech Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-12-07
Anticipated expiration: 2030-12-28

Abstract

The utility model provides a capacitive touch screen, its wiring structure includes two sets of criss-cross first electrode wire and second electrode wire, first electrode wire includes conducting block and tunnel, second electrode wire includes conducting block and connecting wire, the conducting block of second electrode wire passes through the connecting wire and links to each other, the conducting block of first electrode wire passes through the tunnel and links to each other. The conductive block and the tunnel are located on the substrate, an insulating layer is arranged on one side, far away from the substrate, of the tunnel, a connecting line is arranged on one side, far away from the tunnel, of the insulating layer, the connecting line and the tunnel are insulated and separated through the insulating layer, and at least partial projection cross overlapping is formed on the substrate. When the tunnel is designed, the secondary conductive blocks are designed at the same time. The conducting layer at the step crossing position is arranged to be two layers, the height of the step which needs to be crossed by the connecting line is reduced, and the antistatic capacity of the connecting line is improved and the probability that the connecting line is damaged by electrostatic shock is reduced when the connecting line crosses the step through the edge of the insulating layer.

Description

Capacitive touch screen

Technical Field

The utility model belongs to the technical field of the touch-control, in particular to capacitive touch screen.

Background

The existing wiring structure of the capacitive touch screen with the OGS structure is shown in fig. 1, and the wiring includes two groups of first electrode leads and second electrode leads which are crossed, the first electrode leads include conductive blocks 101 and tunnels 104, the second electrode leads include conductive blocks 101 and connecting lines 102, the conductive blocks 101 of the second electrode leads are connected through the connecting lines 102, and the conductive blocks 101 of the first electrode leads are connected through the tunnels 104. The conductive block 101 and the tunnel 104 are located on a substrate (not shown in the figure), an insulating layer 103 is arranged on one side of the tunnel 104 far away from the substrate, a connecting line 102 is arranged on one side of the insulating layer 103 far away from the tunnel 104, the connecting line 102 and the tunnel 104 are insulated and separated by the insulating layer 103, and at least partial projection cross overlap is arranged on the substrate.

During production, the tunnel 104 is arranged on the substrate, the insulating layer 103 is arranged, the conductive block 101 and the connecting line 102 are arranged, the conductive block 101 and the tunnel 104 are located on the substrate, the connecting line 102 is separated from the tunnel 104 below by the insulating layer 103, and in the working process of the touch screen, electricity on the wiring and a high electric field in the circuit can cause rapid and spontaneous charge transfer and are accompanied with electrostatic discharge, the transfer of electricity, the generation of current and the radiation of an electromagnetic field often occur, the original circuit structure can be damaged in the process, particularly, the static accumulation is easily generated on the connecting line 102 above the insulating layer 103, the connecting line 102 is damaged, the reliability of equipment is affected, and the production yield is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a capacitive touch screen aims at overcoming the electrostatic discharge of touch-sensitive screen wiring, and the problem of wounding the touch-sensitive screen connecting wire improves the product yield.

The utility model discloses a realize like this, the embodiment of the utility model provides a capacitive touch screen, similar with traditional touch screen, it can also be including touch-control module and LCD display module assembly, and the improvement part mainly lies in wiring structure, improves through the structure to whole or the partial wire of wiring, solves the problem that electrostatic discharge impairs the touch-sensitive screen connecting wire.

Specifically, the wiring structure of the capacitive touch screen comprises two groups of crossed first electrode leads and second electrode leads, wherein each first electrode lead comprises a conductive block and a tunnel, each second electrode lead comprises a conductive block and a connecting wire, the conductive blocks of the second electrode leads are connected through the connecting wires, and the conductive blocks of the first electrode leads are connected through the tunnels. The conductive block and the tunnel are located on the substrate, an insulating layer is arranged on one side, far away from the substrate, of the tunnel, a connecting line is arranged on one side, far away from the tunnel, of the insulating layer, the connecting line and the tunnel are insulated and separated through the insulating layer, and at least partial projection cross overlapping is formed on the substrate.

The utility model discloses lie in with the difference of traditional capacitive touch screen, when designing the tunnel, design time conducting block simultaneously. Furthermore, in the production process, the conducting layer crossing the step position can be set into two layers without additionally increasing production procedures, the height of the step which needs to be crossed by the connecting wire is reduced while the thickness of the conducting layer is increased, so that when the connecting wire crosses the step through the edge of the insulating layer, the antistatic capacity is improved, the probability that the connecting wire is damaged by static electricity is reduced, the reliability of the touch screen is improved, and the product yield is improved.

Drawings

FIG. 1 is a partial schematic diagram of a wiring structure of a prior art capacitive touch screen;

fig. 2 is a schematic diagram of a first wiring structure of a capacitive touch screen according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a second wiring structure of a capacitive touch screen according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a third wiring structure of a capacitive touch screen according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a fourth wiring structure of a capacitive touch screen according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The following detailed description is given to specific implementations of the present invention with reference to specific embodiments:

the embodiment of the utility model provides a capacitive touch screen, similar with traditional touch screen, it can also be including touch module and LCD display module assembly, and the improvement part mainly lies in wiring structure, improves through the structure to the whole or partial wire of wiring, solves the problem that electrostatic discharge impairs the touch-sensitive screen connecting wire.

Specifically, the wiring structure of the capacitive touch screen is as shown in fig. 2, the wiring includes two sets of first electrode wires 1 and second electrode wires 2 which are crossed, the first electrode wires 1 include conductive blocks 101 and tunnels 104, the second electrode wires 2 include conductive blocks 101 and connecting wires 102, the conductive blocks 101 of the second electrode wires 2 are connected through the connecting wires 102, and the conductive blocks 101 of the first electrode wires 1 are connected through the tunnels 104. The conductive block 101 and the tunnel 104 are located on a substrate (not shown in the figure), an insulating layer 103 is arranged on one side of the tunnel 104 far away from the substrate, a connecting line 102 is arranged on one side of the insulating layer 103 far away from the tunnel 104, the connecting line 102 and the tunnel 104 are insulated and separated by the insulating layer 103, and at least partial projection cross overlap is arranged on the substrate.

The utility model discloses difference with traditional capacitive touch screen lies in, as shown in fig. 2, capacitive touch screen's wiring structure, second electrode wire 2 includes conducting block 101, connecting wire 102 and inferior conducting block 1012, inferior conducting block 1012 sets up with tunnel 104 simultaneously, just inferior conducting block 1012 is at least partly the structure not covered by insulating layer 103, inferior conducting block 1012 with connecting wire 102 has partial projection cross overlap at least on the base plate, through when designing tunnel 104, designs inferior conducting block 1012 simultaneously for connecting wire 102 is when striding the step through the edge of insulating layer 103, and antistatic effect promotes, and the two aspects of main reason package piece are two-layerly for the conducting layer of striding the step position on the one hand, promotes conducting capacity and antistatic effect; on the other hand, the sub-conductive block 1012 can reduce the height of the step that the connection line 102 needs to cross, thereby improving the antistatic capability of the connection line 102.

As shown in fig. 2, in a preferred embodiment, the sub-conductive block 1012 is connected to the outer side of the insulating layer 103, and a partial structure of the connection line 102 and the sub-conductive block 1012 are designed to be electrically conductive, so that the height of a step that the connection line 102 needs to cross can be significantly reduced, and the problem of metal fracture at the connection point between the sub-conductive block 1012 and the insulating layer 103 is reduced, thereby improving the antistatic performance of the connection line 102.

In fig. 2 of the present embodiment, the secondary conductive block 1012 and the conductive block 101 have at least partial projections that are crossed and overlapped on the substrate, that is, the secondary conductive block 1012 and the conductive block 101 are also designed to be electrically conductive.

As shown in fig. 2, in a preferred embodiment, the width of the tunnel 104 is smaller than the width of the connection line 102, because the capacitance generated between the connection line 102 and the tunnel 104 is large, and the connection line 102 of the conventional capacitive touch screen is partially disposed on the substrate and partially disposed on the insulating layer, similar to the arrangement across steps, static accumulation easily occurs, and then the connection line 102 is damaged by static shock, the utility model discloses reduce the capacitance between the tunnel 104 and the connection line 102, shift the weak position of static from the connection line 102 to the tunnel 104, because the tunnel 104 is located on the substrate, there is no arrangement across steps, and the antistatic ability is strong.

It should be noted that fig. 2 shows only a partial wiring structure, and the entire wiring is formed by performing limited extension in the extending direction of the first electrode lead 1 and the second electrode lead 2 in the partial structure.

Further, as shown in fig. 3, in the wiring structure of the capacitive touch screen, the conductive block 101 is provided with a tip portion 1010, and the tip portion 1010 can generate a sharp corner discharge effect to transfer static electricity to the conductive block 101 with strong antistatic capability. In a preferred embodiment, a plurality of tip portions 1010 are disposed on one or more of the conductive blocks 101, wherein at least a portion of the tip portions 1010 form a pair of tip-to-tip arrangement.

Further, as shown in fig. 4, the wiring structure of the capacitive touch screen includes a hollow space 105 in the conductive block 101, and the hollow space 105 is configured to facilitate transferring static electricity to the conductive block 101. In a preferred embodiment, a dummy conductive block 106 with an optical matching function may be further disposed in the hollow space 105.

In a preferred scheme, the hollow space 105 is disposed at a center position of the conductive block 101, the design is favorable for transferring static electricity to a region farthest from the connection line 102, and meanwhile, through experimental tests, the center position of the conductive block 101 on the substrate of the conventional capacitive touch screen is also a region with the strongest static electricity resistance.

In a preferred embodiment, the dummy conductive block 106 is located at a center of the hollow space 105.

Further, the hollow space 105 and/or the dummy conductive block 106 may be one or more.

Further, the hollow space 105 and/or the dummy conductive block 106 may have various shapes, such as various regular patterns, e.g., square, circle, diamond, quadrangle star, pentagon star, hexagon star, etc., or other irregular patterns.

Further, as shown in fig. 5, the wiring structure of the capacitive touch screen includes a hollow space 105 in the conductive block 101, and the design of the hollow space 105 enables the conductive block 101 to include a tip portion 1010, so that static electricity of the connection line 102 can be transferred to the tip portion 1010 of the conductive block 101, thereby reducing the probability that the tunnel 104 is damaged by static electricity.

In a preferred embodiment, the tip 1010 of the first electrode lead 1 is aligned with the connection line 102, and the direction indicated by the sharp corner of the tip 1010 is away from the connection line 102 closest to the tip 1010, so that the static electricity is transferred to the tip 1010 as far as possible from the connection line 102.

In a preferred embodiment, a plurality of tip portions 1010 are disposed on one or more of the conductive blocks 101, wherein at least a portion of the tip portions 1010 form a pair of tip-to-tip arrangement.

In the embodiment, the line width of the tunnel 104 is reduced, and the tip portion 1010 or the dummy conductive block 106 is designed on the conductive block 101, so that static electricity on the connection line 102 with weak antistatic capability is transferred to other areas with strong antistatic capability, thereby reducing the probability of damaging the connection line 102 by static electricity.

In a preferred embodiment, the sharp angle of the tip 1010 is below 60 °, and in a more preferred embodiment, the sharp angle of the tip 1010 is below 30 °.

In other embodiments, the tip portion 1010 may be disposed at an edge of the first electrode lead 1 and/or the second electrode lead 2, so that static electricity generated by a high electric field in the surface is conducted to the edge of the touch screen through the channel to be consumed or transferred to the ground through a tip discharge effect, and further, other channels and circuit mechanisms in the surface are not affected, thereby improving reliability of the touch screen and improving yield of products.

Of course, the capacitive touch screen may further include other basic functional components, such as a polarizer, a TFT array, a color filter, a liquid crystal layer, a touch sensing layer, a cover plate, and the like, which are assembled according to a conventional structure, and are not described in detail in this embodiment.

The above embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention can be made within the protection scope of the present invention.

Claims

1. A capacitive touch screen comprises a wiring, wherein the wiring comprises two groups of crossed wires, namely a plurality of first electrode wires (1) and a plurality of second electrode wires (2), the first electrode wires (1) comprise conductive blocks (101) and tunnels (104), the adjacent conductive blocks (101) of the first electrode wires (1) are connected through the tunnels (104), the second electrode wires (2) comprise the conductive blocks (101) and connecting wires (102), and the conductive blocks (101) of the second electrode wires (2) are connected through the connecting wires (102);

the conductive block (101) and the tunnel (104) are positioned on the substrate, an insulating layer (103) is arranged on one side of the tunnel (104) far away from the substrate, a connecting line (102) is arranged on one side of the insulating layer (103) far away from the tunnel (104), the connecting line (102) and the tunnel (104) are insulated and separated by the insulating layer (103), and the connecting line (102) and the tunnel (104) at least have partial projection cross overlap on the substrate;

the second electrode lead (2) comprises a conductive block (101), a connecting line (102) and a secondary conductive block (1012), wherein the secondary conductive block (1012) and the tunnel (104) are arranged at the same time, at least part of the structure of the secondary conductive block (1012) is not covered by the insulating layer (103), the secondary conductive block (1012) and the connecting line (102) have at least partial projection cross overlapping on the substrate, and part of the structure of the connecting line (102) and the secondary conductive block (1012) are designed to be electrically conducted finally.

2. The capacitive touch screen of claim 1, wherein the sub-conductive bumps (1012) and the conductive bumps (101) have at least partial projection cross-overlaps on the substrate, and the sub-conductive bumps (1012) and the conductive bumps (101) are also designed to be electrically conductive.

3. The capacitive touch screen of claim 1, wherein the conductive bumps (101) are provided with tips (1010).

4. A capacitive touch screen according to claim 3, wherein the tips (1010) of the first electrode wires (1) are collinear with the connecting lines (102) and the tip angles of the tips (1010) point in a direction away from the closest connecting line (102).

5. A capacitive touch screen according to claim 3, wherein a plurality of tips (1010) are provided on one or more of the conductive bumps (101), wherein at least some of the tips (1010) form a pair of opposing tips therebetween.

6. A capacitive touch screen according to claim 3, wherein the tip angle of the tip (1010) is below 60 °.

7. A capacitive touch screen according to claim 1, characterized in that a tip (1010) is also provided at the edge position of the first electrode wire (1) and/or the second electrode wire (2).

8. The capacitive touch screen of claim 1, wherein the conductive block (101) comprises hollowed-out spaces (105).

9. The capacitive touch screen according to claim 8, wherein the hollowed-out space (105) is provided with a virtual conductive block (106) with an optical matching effect.

10. The capacitive touch screen according to claim 8, wherein the hollowed-out space (105) and/or the dummy conductive block (106) are in a square or circular or diamond or quadrangle star or pentagon or hexagon star pattern.