CN216748720U

CN216748720U - Touch screen

Info

Publication number: CN216748720U
Application number: CN202123302683.0U
Authority: CN
Inventors: 田宏宇; 唐晟; 李平; 乐卫文; 胡洪涛; 朱贻祥
Original assignee: Chongqing Laibao Technology Co ltd
Current assignee: Chongqing Laibao Technology Co ltd
Priority date: 2021-12-25
Filing date: 2021-12-25
Publication date: 2022-06-14
Anticipated expiration: 2031-12-25

Abstract

The utility model relates to the technical field of touch control, and provides a touch screen. And the opening electrically connects the second redundant string with the first string. By the method, the resistance of the first channel electrode and the second channel electrode can be greatly reduced, so that the performance of the touch screen is improved, and a uniform optical effect can be ensured on the whole area of the touch screen.

Description

Touch screen

Technical Field

The application relates to the technical field of touch, especially relates to the technical field of touch screens, and specifically relates to a low-impedance ITO material touch screen.

Background

Capacitive/resistive touch screens, flat panel display devices, and the like have used ITO as a transparent conductive electrode over a large area.

The conductivity of the ITO thin film is not only related to the composition of the ITO thin film material (including tin content and oxygen content), but also related to the process conditions (including substrate temperature, sputtering voltage, etc. during deposition) when preparing the ITO thin film. Several factors that affect the conductive properties of ITO thin films include: the sheet resistance (γ), film thickness (d), and resistivity (ρ) of the ITO thin film are related to each other: in order to obtain ITO thin films with different sheet resistances, γ ═ ρ/d is actually required to obtain different film thicknesses and resistivities. As can be seen from the above formula, the ITO film has good conductivity (i.e., low sheet resistance), and the film thickness is increased for a given resistivity, which results in a decrease in the light transmittance of the ITO film, and vice versa. Therefore, the resistivity of the ITO film is critical to the ITO film preparation process, and the resistivity (ρ) is required to be as small as possible to obtain good transmittance and conductivity. But the resistivity is limited by the material of ITO itself.

The relatively high resistivity of the ITO, along with the increase of the size of the touch screen, the channel resistance formed after the ITO pattern is etched will be continuously increased, which affects the screen brightness and the sensor responsiveness. And as the number of electrodes increases, the area of the frame wiring portion also increases. On a large-size touch screen, although the method of taking out wiring electrodes at two ends of a long-side sensor electrode can be utilized for dealing with the touch screen, the process difficulty and the cost are greatly increased.

Meanwhile, the thickness and the surface resistance of the ITO film are in a certain corresponding relation with the color. The low surface resistance ITO has certain color and lower transmittance, and the low surface resistance ITO has obvious graphic appearance display after etching due to thick film thickness, thereby greatly influencing the use experience of customers.

SUMMERY OF THE UTILITY MODEL

In view of the above technical problems, the present application provides a solution for solving the problem of low surface resistance of ITO electrode products that ITO patterns are visible, and simultaneously has relatively optimized transmittance and color effect.

The technical scheme for solving the technical problem is as follows:

the application provides a touch-sensitive screen of low impedance, this touch-sensitive screen include base plate, first electrode layer, insulating layer and second electrode layer, first electrode layer is located on the base plate, the insulating layer is located on the first electrode layer, promptly the insulating layer only covers the subregion of first electrode layer, the second electrode layer is located on first electrode layer or/and the insulating layer.

The first electrode layer comprises a plurality of first channel electrodes in a first direction and a plurality of first redundant strings, and the first channel electrodes and the first redundant strings are physically separated and electrically isolated. The first channel electrodes include first strings and first connection lines, and the first strings of each of the first channel electrodes are electrically connected to each other through the first connection lines to form one first channel electrode.

The second electrode layer comprises a plurality of second channel electrodes and a plurality of second redundant series, and the second channel electrodes and the second redundant series are physically separated and electrically isolated. The second channel electrodes comprise second strings and second connecting lines, and the second strings of each second channel electrode are electrically connected with each other through the second connecting lines to form one second channel electrode.

The first channel electrode and the second channel electrode are arranged in a crossing manner, and the insulating layer is used for electrically insulating and isolating the first channel electrode and the second channel electrode only at the crossing point.

The touch screen is different from other touch screens in that an opening is formed in the insulating layer, and the second string is electrically connected with the first redundant string through the opening. And the opening electrically connects the second redundant string with the first string. The resistance of the first channel electrode and the second channel electrode can be greatly reduced by the method, so that the performance of the touch screen is improved.

The touch screen provided by the application reduces the resistance of the channel electrode by arranging the redundant serial in the touch screen, and therefore the performance of the touch screen is improved. Also, a uniform optical effect can be ensured over the entire area of the touch screen.

Drawings

The present application will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a cross-sectional view of a touch screen of the present application;

FIG. 2 is a plan view of a first electrode layer of a touch screen of the present application;

FIG. 3 is a plan view of a second electrode layer of the touch screen of the present application;

fig. 4 is a plan view of a touch panel of the present application.

Reference numerals:

100. the structure of the capacitor comprises a substrate, 10, a first electrode layer, 200, an insulating layer, 20, a second electrode layer, 101, a first channel electrode, 110, a first string, 210, a first redundant string, 112, a first connecting line, 102, a second channel electrode, 120, a second string, 220, a second redundant string, 122 and a second connecting line.

Detailed Description

In order to explain the touch screen provided by the application, the following detailed description is made in conjunction with the accompanying drawings and the text description of the embodiments.

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the various embodiments. It is to be understood, however, that various embodiments may be practiced without these specific details or with one or more equivalent arrangements.

The terms first, second, etc. may be used herein to describe various elements, components, regions, layers and/or sections, etc., but these elements, components, regions, layers and/or sections should not be limited by these terms. Spatially relative terms such as "under," "below," "lower," "over," "upper," and the like may be used herein for descriptive purposes and thus to describe one device or feature's relationship to another device(s) or feature(s) as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the product in use, operation, and/or manufacture in addition to the orientation depicted in the figures.

The terminology used in the present application is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, the terms "comprises," "comprising," and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Unless expressly defined as such herein, terms such as those defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art.

Fig. 1 is a cross-sectional view of a touch screen of the present application. Referring to fig. 1, the touch screen of the present application includes a substrate 100, a first electrode layer 10, an insulating layer 200, and a second electrode layer 20, wherein the first electrode layer 10 is disposed on the substrate 100, the insulating layer 200 is disposed on the first electrode layer 10, that is, the insulating layer covers only a partial region of the first electrode layer 10, and the second electrode layer 20 is disposed on the first electrode layer 10 or/and the insulating layer 200.

The substrate 100 may be formed of various insulating materials, such as glass or a film material.

In order to more clearly understand the present application, the present application is specifically exemplified with reference to fig. 2 and 3. Fig. 2 is a plan view of the first electrode layer 10 of the touch panel of the present application. The first electrode layer 10 includes a plurality of first channel electrodes 101 in a first direction and a plurality of first redundant strings 210, and the first channel electrodes 101 and the first redundant strings 210 are physically separated and electrically isolated. The first via electrodes 101 include first strings 110 and first connection lines 112, and the first strings 110 of each first via electrode 101 are electrically connected to each other through the first connection lines 112 to form one first via electrode 101.

Fig. 3 is a plan view of the second electrode layer 20 of the touch panel of the present application. The second electrode layer 20 includes a plurality of second channel electrodes 102 and a plurality of second redundant series 220, and the second channel electrodes 102 and the second redundant series 220 are physically separated and electrically isolated. The second via electrodes 102 include second series 120 and second connecting lines 122, and the second series 120 of each second via electrode 102 are electrically connected to each other through the second connecting lines 122 to form one second via electrode 102.

Fig. 4 is a plan view of the touch screen of the present application. The first channel electrode 101 is arranged to cross the second channel electrode 102, and the insulating layer 200 electrically insulates and separates the first channel electrode 101 from the second channel electrode 102 at the crossing point. The insulating layer 200 is provided with openings at least on the first redundant string 210 and the first string 110, and the second string 120 covers at least a part of the first redundant string 210 through the openings to form an electrical connection. The second redundant string 220 covers at least a portion of the first string 110 through an opening to form an electrical connection.

In an alternative scheme, the second string 120 and the first redundant string 210 just completely overlap with each other in projection on the substrate 100, so that the impedance of the second channel electrode 102 is maximally reduced.

In an alternative scheme, the second redundancy string 220 and the projection of the first string 110 on the substrate 100 just completely overlap, so that the impedance of the first channel electrode 101 is reduced to the maximum.

In an alternative, the touch screen has the same number of second strings 120 and first redundant strings 210 to prevent color differences.

Also, in an alternative, the touch screen has the same number of the second redundant string 220 and the first string 110 to prevent color differences.

In other embodiments, only some (i.e., not all) of the second strings 120 may be electrically connected to the first redundancy string 210. In this case, the number of second strings 120 may be different from the number of first redundant strings 210. Only some (i.e., not all) of the first strings 110 may be electrically connected to the second redundant string 220. In this case, the number of the first strings 110 may be different from the number of the second redundant string 220. This embodiment is not the solution that needs protection of the present application.

In an optional scheme, the width of the first connection line 112 is smaller than the widths of the first string 110 and the first redundant string 210, so that touch sensitivity can be improved.

In an optional scheme, the width of the second connection line 122 is smaller than the widths of the second string 120 and the second redundant string 220, so that touch sensitivity can be improved.

In the present embodiment, the insulating layer electrically insulates and separates the first channel electrode 101 from the second channel electrode 102 only at the intersection. In other alternative embodiments, the insulating layer 200 may be widely distributed over the substrate 100, and the openings of the insulating layer only need to be satisfied to ensure that the second string 120 is electrically connected to the first redundant string 210 through the openings, and the second redundant string 220 is electrically connected to the first string 110 through the openings. Thus, the insulating layer 200 can provide a strong electrical insulation effect.

In an embodiment, the first string 110, the first redundancy string 210, the second string 120, and the second redundancy string 220 are formed of various transparent conductive materials. For example, Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), or Indium Gallium Zinc Oxide (IGZO) is formed to ensure the overall transmittance of the touch screen.

Specifically, the first and

second connection lines

112 and 122 may be formed of various conductive materials, i.e., various transparent conductive materials, such as Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), or Indium Gallium Zinc Oxide (IGZO). The first and

second connection lines

112 and 122 may also be formed of an opaque metal material, for example, one or more materials of silver (Ag), aluminum (Al), copper (Cu), chromium (Cr), nickel (Ni), or molybdenum (Mo).

In a preferred embodiment, the first connection lines 112 may be formed of various transparent conductive materials such as Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), Indium Gallium Zinc Oxide (IGZO), and in this case, the first string 110, the first redundant string 210, and the first connection lines 112 may be manufactured at one time, which saves the process.

In a preferred embodiment, the second connection line 122 may be formed of an opaque metal such as silver (Ag), aluminum (Al), copper (Cu), chromium (Cr), nickel (Ni), or molybdenum (Mo), and in this case, the second connection line 122 is not easily broken when crossing the insulating layer of the intersection due to better ductility of the metal, and the metal generally has lower resistance.

In specific embodiments, the insulating layer 200 may be formed of various insulating materials, for example, silicon oxide (SiOX), silicon nitride (SiNX), and resin materials.

In order to realize the touch screen and display supporting functions, the touch screen of the embodiment of the present application may be attached to a display panel for displaying an image, so as to obtain a touch display screen.

Although certain specific embodiments and implementations have been described herein, other embodiments and modifications will become apparent from the description. Accordingly, the concepts of the present application are not limited to these embodiments, but are to be accorded the widest scope consistent with the claims set forth herein and with various obvious modifications and equivalent arrangements.

The features of the embodiments and embodiments described herein above may be combined with each other without conflict.

Claims

1. A touch screen comprises a substrate (100), a first electrode layer (10), an insulating layer (200) and a second electrode layer (20), wherein the first electrode layer (10) is arranged on the substrate (100), the insulating layer (200) is arranged on the first electrode layer (10), namely the insulating layer (200) only covers a partial area of the first electrode layer (10), and the second electrode layer (20) is arranged on the first electrode layer (10) or/and the insulating layer (200);

the first electrode layer (10) comprises a plurality of first channel electrodes (101) in a first direction and a plurality of first redundant strings (210), the first channel electrodes (101) and the first redundant strings (210) are physically separated and electrically isolated, the first channel electrodes (101) comprise first strings (110) and first connecting lines (112), and the first strings (110) of each first channel electrode (101) are electrically connected with each other through the first connecting lines (112) to form one first channel electrode (101);

the second electrode layer (20) comprises a plurality of second channel electrodes (102) and a plurality of second redundant series (220), the second channel electrodes (102) and the second redundant series (220) are physically separated and electrically isolated, the second channel electrodes (102) comprise a second series (120) and second connecting lines (122), and the second series (120) of each second channel electrode (102) are electrically connected with each other through the second connecting lines (122) to form a second channel electrode (102);

the first channel electrodes (101) and the second channel electrodes (102) are arranged in a crossed mode, the insulating layer (200) electrically insulates and separates the first channel electrodes (101) from the second channel electrodes (102) at the crossed points, openings are formed in at least the first redundant string (210) and the first string (110) of the insulating layer (200), the second string (120) covers at least one part of the first redundant string (210) through the openings to form electric connection, and the second redundant string (220) covers at least one part of the first string (110) through the openings to form electric connection.

2. The touch screen of claim 1, wherein the second string (120) exactly completely overlaps a projection of the first redundant string (210) on the substrate (100).

3. The touch screen of claim 1, wherein the second redundant string (220) exactly completely overlaps a projection of the first string (110) on the substrate (100).

4. The touch screen of claim 1, wherein the touch screen has a same number of second strings (120) and first redundant strings (210).

5. The touch screen of claim 1, wherein the touch screen has a same number of second redundant strings (220) and first strings (110).

6. The touch screen of claim 1, wherein the width of the first connection line (112) is less than the width of the first string (110), the first redundant string (210).

7. The touch screen of claim 1, wherein the second connection line (122) has a width that is less than a width of the second string (120) and the second redundant string (220).

8. A touch screen according to claim 1, wherein the substrate (100) is made of glass or film.

9. The touch screen of claim 1, wherein the first connection lines (112) and the second connection lines (122) are formed of indium tin oxide or indium zinc oxide or indium gallium zinc oxide.

10. The touch screen of claim 1, wherein the first connection line (112) and the second connection line (122) are formed of one or more materials of silver, aluminum, copper, chromium, nickel, molybdenum.