WO2019104458A1

WO2019104458A1 - Capacitive touch screen

Info

Publication number: WO2019104458A1
Application number: PCT/CN2017/113271
Authority: WO
Inventors: 包春贵
Original assignee: 深圳市柔宇科技有限公司
Priority date: 2017-11-28
Filing date: 2017-11-28
Publication date: 2019-06-06
Also published as: CN111356973A

Abstract

Disclosed in the embodiments of the present invention is a capacitive touch screen, comprising: a touch chip; a conductive layer, comprising a conductive region and a wiring region, the conductive region being provided therein with a plurality of separate conductive electrodes, the wiring region being provided with a plurality of separate transmission lines, and each conductive electrode being electrically connected to the touch chip by means of the transmission lines; an insulating layer located on the conductive layer; and a touch layer located above the insulating layer, the touch layer comprising a plurality of separate touch electrodes, the touch electrodes corresponding to the conductive electrodes, and at least some of the touch electrodes extending to the upper portion of the wiring region. When the capacitive touch screen is touched, a charge change in the touch electrode causes a charge change in the corresponding conductive electrode, and the touch chip learns the charge change in the conductive electrode by means of the transmission lines, so as to use same to determine the touch position. The present invention has the advantage of improving the user's touch experience.

Description

Capacitive touch screen

Technical field

The present invention relates to the field of touch, and in particular to a capacitive touch screen.

Background technique

An existing capacitive touch screen, as shown in FIG. 1 , includes a touch chip 130 , a plurality of strip-shaped touch electrodes 110 , and a plurality of transmission lines 120 , wherein the touch chip 130 is located at a lower end of the capacitive touch screen. The touch electrodes 110 are located on the upper side of the touch chip 130, and the plurality of touch electrodes 110 are parallel to each other and extend along the X-axis direction, and the left and right sides of each of the touch electrodes 110 are respectively The touch chip 130 is electrically connected through the transmission line 120. Therefore, the touch chip 130 sends a sensing signal to the plurality of touch electrodes 110 through the transmission line 120, and the touch electrode 110 forms a first capacitance with the ground. This capacitive touch screen detects slip and one-dimensional position. When the user touches the touch electrode 110, the user's finger forms a second capacitance with the touch electrode 110, thereby causing a change in the charge on the touch electrode 110. The touch chip 130 detects the change, and further Get the position or action of the user's finger.

When the above-mentioned capacitive touch screen is used, since the left and right edges of the capacitive touch screen need to leave a space for the transmission line 120 to be routed, when the user touches the position where the transmission line 120 is located, the touch electrode 110 cannot be recognized at this time, that is, The area where the transmission line 120 is located is a touch dead zone, resulting in a poor user experience.

Summary of the invention

A technical problem to be solved by embodiments of the present invention is to provide a capacitive touch screen. Improved user touch experience and reduced touch dead zone.

In order to solve the above technical problem, an embodiment of the present invention provides a capacitance detecting touch screen, including:

Touch chip

a conductive layer comprising a conductive region and a trace region, wherein the conductive region is provided with a plurality of separated conductive electrodes, wherein the trace region is provided with a plurality of separate transmission lines, and each conductive electrode passes through the transmission line and the Touch Chip electrical connection;

An insulating layer on the conductive layer;

a touch layer, which is located above the insulating layer, the touch layer includes a plurality of separate touch electrodes, the touch electrodes correspond to the conductive electrodes, and at least a portion of the touch electrodes extend to the Above the line area; among them,

When the capacitive touch screen is touched, the change in the charge on the touch electrode causes a change in the charge on the corresponding conductive electrode, and the touch chip knows the change in the charge on the conductive electrode through the transmission line for determining the touch position.

Embodiments of the present invention have the following beneficial effects:

The touch electrode extends to the routing area, so that when the user touches the capacitive touch screen area corresponding to the routing area, the third capacitance of the user's finger and the corresponding touch electrode appears, thereby causing the corresponding touch electrode to be sensed. The amount of charge changes, which in turn causes a change in the amount of charge on the corresponding conductive electrode, and the change is detected by the touch chip, so that the touch chip can obtain the touch position by calculation. Therefore, even if the user's finger touches the capacitive touch screen area corresponding to the routing area, the touch chip can detect the touch position, thereby improving the problem of the touch dead zone in the background art, thereby improving the user experience. Moreover, the capacitive touch screen of the embodiment of the invention has a simple structure and a low cost.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic diagram of a capacitive touch screen of the prior art;

Figure 2 is a schematic view showing a conductive layer of a first embodiment of the present invention;

3 is a schematic view of a touch layer according to a first embodiment of the present invention;

4 is a schematic view of a capacitive touch screen according to a first embodiment of the present invention (the insulating layer is hidden);

Figure 5 is a cross-sectional view showing a capacitive touch screen according to a first embodiment of the present invention;

6 is a schematic diagram of the capacitive touch screen of the first embodiment of the present invention when it is not touched;

7 is a schematic diagram of a capacitive touch screen according to a first embodiment of the present invention;

Figure 8 is a schematic view showing a conductive layer of a second embodiment of the present invention;

9 is a schematic view of a capacitive touch screen according to a second embodiment of the present invention (the insulating layer is hidden);

Graphic label:

110, 210, 310-touch electrode; 211-first touch electrode; 212-second touch electrode; 213-third touch electrode; 120, 220, 320-transmission line; 130, 230-touch Control chip; 240, 340-conductive electrode; 241-first conductive electrode; 242-second conductive electrode; 243-third conductive electrode; 250-insulation layer; 260, 360-conductive layer; 270, 370- Wiring area; 280-protective layer; 290-substrate substrate.

Detailed ways

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The terms "comprising" and "having", and any variations thereof, appearing in the specification, the claims, and the drawings are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or device that comprises a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units not listed, or alternatively Other steps or units inherent to these processes, methods, products or equipment. Moreover, the terms "first," "second," and "third," etc. are used to distinguish different objects, and are not intended to describe a particular order.

First embodiment

The embodiment of the invention provides a capacitive touch screen. Referring to FIG. 2 to FIG. 7 , the capacitive touch screen includes a touch chip 230 , a conductive layer, an insulating layer 250 and a touch layer.

In this embodiment, the touch chip 230 can be used to emit a sensing signal for detecting a touch position, or can receive a signal of a charge change and process the signal, thereby obtaining a position where a charge change is generated, thereby obtaining a current position. Touch location. In this embodiment, the touch chip 230 is located at the location The upper or lower side of the capacitive touch screen is located on the lower side of the capacitive touch screen in FIG.

In the present embodiment, referring to FIG. 2, the conductive layer includes a conductive region 260 and a trace region 270, and the trace region 270 is located outside the conductive region 260, for example, at the left of the trace region 270. The side, the right side, the upper side (the touch chip 230 is located on the left side or the right side), the lower side (the touch chip 230 is located on the left side or the right side), etc., in the embodiment, the routing area 270 is located to the right of the conductive region 260. In this embodiment, the conductive region 260 includes a plurality of separated conductive electrodes 240 that are parallel to each other and extend in the X-axis direction, that is, the conductive electrodes 240 extend from the left side to the left side. On the right side, in the embodiment, the conductive electrode 240 extends from the left end of the capacitive touch screen to a position at a distance from the right end, that is, a certain distance from the right end. Of course, in other embodiments of the invention, the conductive electrode may also extend from the upper side to the lower side. In this embodiment, the conductive electrodes 240 are elongated, and the lengths of the plurality of conductive electrodes 240 are different, and the left ends are on the same vertical line, but the right ends are on different vertical lines. Specifically, in the present embodiment, the right ends of the plurality of conductive electrodes 240 from top to bottom are gradually inwardly retracted, that is, to the left, that is, sorted from top to bottom, at all the conductive electrodes 240. The right end of the first conductive electrode 241 is located at the rightmost side, the right end of the second conductive electrode 242 is located on the right side, the right end of the second conductive electrode 243 is located on the right side of the second, ..., the right end of the last conductive electrode 240 The right end of the other conductive electrode 240 is located at the leftmost side. However, the present invention is not limited thereto. In the embodiment of the invention, the lengths of the plurality of conductive electrodes are different, and the left and right ends of the plurality of conductive electrodes are gradually retracted from top to bottom, that is, gradually shrinking toward the middle. . In other embodiments of the present invention, the lengths of the plurality of conductive electrodes are different. Specifically, the right ends of the plurality of conductive electrodes are located on the same vertical line, and the left end thereof is gradually retracted from top to bottom.

In this embodiment, please continue to refer to FIG. 2 , the trace area 270 is located at the right end of the conductive region 260 , specifically, the trace region 270 is the second conductive electrode 242 - the last conductive electrode 240 The area where the first conductive electrode 241 is vacated, so that the boundary line between the wiring area 270 and the conductive area 260 is stepped (see the broken line in FIG. 2). In this embodiment, a plurality of separated transmission lines 220 are disposed in the routing area 270, the number of the transmission lines 220 is the same as the number of the conductive electrodes 240, and each of the conductive electrodes 240 is electrically connected to one of the above-mentioned conductive electrodes 240. Transmission line 220. Specifically, the lower end of the right side of the conductive electrode 240 is electrically connected to the transmission line 220, where the transmission line 220 is perpendicular to the conductive electrode 240 electrically connected thereto, and thus the right end of the conductive electrode 240 is known. To shrink inwardly, to vacate the right side area for the transmission line 220, avoid transmission The line 220 and the conductive electrode 240 interfere with each other. In this embodiment, there is no transmission line 220 on the right side of the first conductive electrode 241 (the transmission line 220 electrically connected to the first conductive electrode 241 is on the lower side thereof), and a transmission line on the right side of the second conductive electrode 242 There are two transmission lines 220 on the right side of the third conductive electrode 243, ..., there are n-1 transmission lines 220 on the right side of the nth conductive electrode 240 (n is an integer greater than or equal to 2), ... . In the embodiment, the end of the transmission line 220 is electrically connected to the touch chip 230. In this embodiment, the lower end of the transmission line 220 is electrically connected to the touch chip 230.

In this embodiment, referring to FIG. 5 , the insulating layer 250 is located on the conductive layer, and the insulating layer 250 covers the conductive electrode 240 and the transmission line 220 . In the present embodiment, the material of the insulating layer 250 is SiO ₂ , a silicon nitride compound, or the like.

In this embodiment, referring to FIG. 2 to FIG. 4, the touch layer is disposed on the insulating layer 250, the touch layer includes a plurality of separate touch electrodes 210, and the touch electrodes 210 and the The conductive electrodes 240 correspond to each other. In this embodiment, the plurality of touch electrodes 210 are elongated, and the plurality of touch electrodes 210 are parallel to each other and extend along the X-axis direction, that is, the touch electrodes 210 extend from the left end of the capacitive touch screen. To the opposite end, that is, the right end, and the number of the touch electrodes 210 is the same as the number of the conductive electrodes 240, each touch electrode 210 is located above the corresponding one of the conductive electrodes 240 and parallel to the conductive electrodes 240. Additionally, in other embodiments of the invention, the conductive electrode may also extend from top to bottom. In this embodiment, the plurality of touch electrodes 210 have the same size, specifically the same length and width. In this embodiment, the area of the touch electrode 210 is greater than or equal to the area of any one of the conductive electrodes 240. Specifically, the length dimension of the plurality of touch electrodes 210 is equal to the length dimension of the first conductive electrode 240, and the width of the plurality of touch electrodes 210 in the width direction is equal to the first conductive electrode 240. The width dimension, that is, the area of the first conductive electrode 241 is the same as the area of any one of the touch electrodes 210, and the area of the lower conductive electrode 240 is smaller than the area of any one of the touch electrodes 210.

The touch electrode 210 of the touch layer is suspended from the conductive electrode 240. That is, the touch electrode 210 is not electrically connected to the conductive electrode 240 or the touch chip 230, but to the conductive electrode 240 and the touch chip 230. Maintain electrical insulation. Since the touch electrode 210 is not connected to the conductive electrode 240 and the touch chip 230 through the wire, the touch electrode 210 itself does not pass current, but generates an induced charge by inducing the charge of the conductive electrode 240. The induced charge of the touch electrode 210 is formed upward The electric field, and at the same time, forms a closed electric field with the charge of the conductive electrode 240. Therefore, the touch electrode 210 substantially forms a self-capacitance by the conductive electrode 240, and is not a mutual capacitance.

In this embodiment, referring to FIG. 4 , at least a portion of the touch electrode 210 extends from above the conductive region 260 to above the trace region 270 . Specifically, the first touch electrodes 211 cover the first conductive electrodes 241, and the second touch electrodes 212 cover the second conductive electrodes 242 and extend to the second conductive electrodes 242. On the right transmission line 220, the third touch electrode 213 covers the third conductive electrode 243 and extends to the two transmission lines 220 on the right side of the third conductive electrode 243, and the fourth touch electrode 210 covers the fourth. The conductive electrode 240 extends to the three transmission lines 220 on the right side of the fourth conductive electrode 240. The nth touch electrode 210 covers the nth conductive electrode 240 and extends to the right side of the nth conductive electrode 240. 1 transmission line 220, .... In this embodiment, the touch electrode 210 and the corresponding conductive electrode 240 form a first capacitor C1, the first capacitor C1 is a self-capacitance, and the touch electrode 210 forms a second capacitor C2 with the ground GND. Capacitor C1 and second capacitor C2 are connected in series (see Figure 6).

In this embodiment, referring to FIG. 4 and FIG. 6 , when the touch chip 230 sends an inductive signal to the conductive electrode 240 , the sensing signal is a voltage signal or a current signal, and the conductive electrode 240 is on the conductive electrode 240. For example, a negative charge is accumulated. Due to the principle of capacitive coupling, the corresponding touch electrode 210 is filled with a positive charge. Since the entire touch electrode 210 is an equipotential body, the corresponding touch electrode 210 on the transmission line 220 is also full. positive charge. Referring to FIG. 7 , when the user touches the capacitive touch screen, the user's finger forms a third capacitance C3 with the touch electrode 210 , so that the amount of positive charge on the touch electrode 210 changes, thereby causing the corresponding conductive electrode 240 . The amount of the upper charge is changed. At this time, the touch chip 230 can detect the current through the transmission line 220. According to the current, the touch chip 230 can obtain which conductive electrode 240 or which conductive electrodes 240 change, when the conductive electrode is obtained. When there is a current on the transmission line 220 corresponding to 240, the current is a one-dimensional touch. When there is a current on the transmission line 220 corresponding to the plurality of conductive electrodes 240, the sliding control is performed at this time, and the user's finger is controlled by a touch electrode 210. The area slides to another area or touch areas.

Therefore, in the embodiment, the touch electrode 210 extends to the routing area 270, so that when the user touches the capacitive touch screen area corresponding to the routing area 270, the user's finger and the corresponding touch electrode 210 appear. The three capacitors C3 cause the charge on the corresponding touch electrode 210 to change, thereby causing a change in the amount of charge on the corresponding conductive electrode 240, and the change is touched by current The control chip 230 detects that the touch chip 230 can obtain the touch position by calculation. Therefore, even if the user's finger touches the capacitive touch screen area corresponding to the routing area 270, the touch chip 230 can detect the touch position, thereby improving the problem of the touch dead zone in the background art, thereby improving the user experience. Moreover, the capacitive touch screen of the embodiment of the invention has a simple structure and a low cost.

In this embodiment, the sensing signal sent by the touch chip 230 to the conductive electrode 240 through the transmission line 220 is an alternating current signal, so that the polarity of the charge on the conductive electrode 240 changes periodically, for example, at a certain time period. The conductive electrode 240 has a negative charge, and the conductive electrode 240 has a positive charge for the next period of time, and the polarity of the charge on the touch electrode 210 changes periodically.

In this embodiment, in order to make the first capacitor relatively sensitive, the insulating layer 250 between the conductive electrode 240 and the touch electrode 210 may not be too thick; and, in order to prevent the first capacitor from being easily broken down, The insulating layer 250 should also not be too thin. In this embodiment, the thickness of the insulating layer 250 ranges from 0.01 mm to 1.0 mm, for example, 0.01 mm, 0.05 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8mm, 0.9mm, 1.0mm, etc.

In addition, in the embodiment, the capacitive touch screen further includes a protective layer 280 and a base substrate 290. The protective layer 280 is located on the touch electrode 210, and the base substrate 290 is located below the conductive layer. . Actually, if viewed from the top, please refer to FIG. 5 , the touch electrode 210 is located on the protection layer 280 , the insulating layer 250 is located on the touch electrode 210 , and the conductive layer is located. On the insulating layer 250, the base substrate 290 is located on the conductive layer. Thus, when the user touches the capacitive touch screen, the user actually touches the protective layer 280.

In addition, in the embodiment, the touch chip 230 is actually located on the base substrate 290. However, the present invention is not limited thereto. In other embodiments of the present invention, the capacitive touch screen further includes a flexible circuit board, the flexible circuit board is bonded on the base substrate, and the touch chip is located The flexible circuit board.

Second embodiment

9 is a schematic diagram of a capacitive touch screen according to a second embodiment of the present invention. The schematic diagram of FIG. 9 is similar to the schematic diagram of FIG. 4, and thus the same component symbols represent the same components. The main difference between this embodiment and the second embodiment is the connection of the transmission line and the conductive electrode.

Referring to FIG. 8 and FIG. 9 , in the embodiment, the conductive layer includes a conductive region 360 and a trace region 370 , and the trace regions 370 are located on opposite sides of the conductive region 360 . Specifically, the conductive region 360 is provided with a plurality of separated conductive electrodes 340, and the conductive electrodes 340 are elongated and extend from the left side to the right side. In this embodiment, the plurality of conductive electrodes 340 have the same area, that is, their lengths and widths are the same. In this embodiment, the routing area 370 is located on the left and right sides of the conductive area 260, that is, has two routing areas 370, wherein a plurality of transmission lines are disposed in the left side routing area 370. 320. The number of the transmission lines 320 in the routing area 370 on the left side is equal to the number of the conductive electrodes 340. One end of each transmission line 320 is electrically connected to the corresponding conductive electrode 340, and the other end is electrically connected to the touch chip 230. Similarly, the same number of transmission lines 320 are provided in the routing area 370 on the right side, and the corresponding one of the transmission lines 370 in the right side line area 370 is electrically connected to the corresponding conductive electrode 340. One end is electrically connected to the touch chip 230. That is, the left and right ends of the same conductive electrode 340 are electrically connected to the touch chip 230 through a transmission line 320, respectively. Therefore, the touch chip 230 is more sensitive to receive the current signal and transmit the sensing signal.

In this embodiment, the touch layer includes a plurality of separate touch electrodes 310, the touch electrodes 310 extend from the left side to the right side, and the number of the touch electrodes 310 and the conductive electrodes 340 The number of touch electrodes 310 is the same as that of one conductive electrode 340. In this embodiment, the plurality of touch electrodes 310 have the same area, that is, the plurality of touch electrodes 310 have the same length and width. In this embodiment, the area of any one of the touch electrodes 310 is larger than the area of any one of the conductive electrodes 340. Specifically, the width of any one of the touch electrodes 310 is greater than or equal to the width of any one of the conductive electrodes 340, and any one of the touch electrodes 310 The length is greater than the length of any one of the conductive electrodes 340. Specifically, any one of the touch electrodes 310 covers the corresponding conductive electrode 340 and covers the transmission line 320 connected to the corresponding one of the conductive electrodes 340. Specifically, the touch electrode 310 extends to the left to the left trace area 370. Above, a transmission line 320 on the left side connected to the corresponding conductive electrode 340 is covered, extending rightward to the right of the right wiring area 370, covering the transmission line 320 on the right side connected to the corresponding conductive electrode 340.

In the present embodiment, please refer to the trace area 370 on the left side, the transmission line 320 includes a first segment adjacent to the conductive electrode 340 electrically connected thereto and a second segment electrically connected to the conductive electrode 340 away therefrom, and the conductive electrode The corresponding touch electrode 310 of the 340 covers the first electrode of the conductive electrode 340 and the transmission line 320 electrically connected to the conductive electrode 340. In this embodiment, the first segment is a horizontal setting, The second segment is longitudinally disposed, and the second segment of the transmission line 320 is covered by the touch electrode 310 corresponding to the lower conductive electrode 340. Similarly, in the trace area 370 on the right side, the transmission line 320 also includes a first segment adjacent to the conductive electrode 340 electrically connected thereto and a second segment remote from the conductive electrode 340 electrically connected thereto, corresponding to the conductive electrode 340 The touch electrode 310 covers the conductive electrode 340 and a first segment of the transmission line 320 electrically connected to the conductive electrode 340. The second segment of the transmission line 320 is covered by the touch electrode 310 corresponding to the lower conductive electrode 340.

It should be noted that the various embodiments in the present specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same similar parts between the various embodiments are mutually referred to. can. For the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and thus equivalent changes made in the claims of the present invention are still within the scope of the present invention.

Claims

A capacitive touch screen, comprising:

Touch chip

a conductive layer comprising a conductive region and a trace region, wherein the conductive region is provided with a plurality of separated conductive electrodes, wherein the trace region is provided with a plurality of separate transmission lines, and each conductive electrode passes through the transmission line and the The touch chip is electrically connected;

An insulating layer on the conductive layer;

a touch layer, which is located above the insulating layer, the touch layer includes a plurality of separate touch electrodes, the touch electrodes correspond to the conductive electrodes, and at least a portion of the touch electrodes extend to the Above the line area; among them,

When the capacitive touch screen is touched, the change in the charge on the touch electrode causes a change in the charge on the corresponding conductive electrode, and the touch chip knows the change in the charge on the conductive electrode through the transmission line for determining the touch position.
The capacitive touch screen of claim 1 , wherein the touch electrode forms an open electric field upward, and the touch electrode forms a closed electric field with the conductive electrode.
The capacitive touch screen of claim 1 , wherein the touch electrodes are not electrically connected to the conductive electrodes and the touch chips.
The capacitive touch screen of claim 1 wherein the charge on the touch electrode is an induced charge generated by the charge of the conductive electrode.
The capacitive touch screen according to claim 1, wherein the first ends of the plurality of conductive electrodes are gradually contracted inwardly, and the wiring regions are located at positions where the conductive electrodes are contracted.
The capacitive touch screen of claim 5, wherein the edge line of the routing area adjacent to the conductive area is stepped.
The capacitive touch screen of claim 1 wherein said insulating layer has a thickness in the range of from 0.01 mm to 1.0 mm.
The capacitive touch screen of claim 1 , wherein one end of the transmission line is electrically connected to the side of the conductive electrode adjacent to the touch chip.
The capacitive touch screen of claim 1 , wherein the touch electrode covers a corresponding one of the conductive electrodes and a transmission line connected to the corresponding one of the conductive electrodes.
The capacitive touch screen of claim 9 wherein the transmission line connecting the respective one of the conductive electrodes is perpendicular to the corresponding one of the conductive electrodes.
The capacitive touch screen of claim 9, wherein the corresponding one of the conductive electrodes is connected to the first segment and the second segment away from the corresponding one of the conductive electrodes, each of which is adjacent to the corresponding one of the conductive electrodes. The touch electrode covers the first conductive electrode and the first segment of the transmission line connected to the corresponding one of the conductive electrodes.
The capacitive touch screen of claim 11 wherein the second segment of the transmission line connected to the corresponding one of the conductive electrodes is covered by the other of the touch electrodes.
The capacitive touch panel of claim 1 , wherein a second capacitor is formed between the touch electrode and the ground, and a first capacitor is formed between the touch electrode and the conductive electrode, and the first capacitor is connected in series with the second capacitor.
The capacitive touch screen of claim 1 , wherein the routing area is located on opposite sides of the conductive area, and two ends of each conductive electrode are respectively electrically connected to the transmission line, and the two transmission lines are electrically connected to the touch Control chip.
The capacitive touch screen of claim 1 , wherein an area of any one of the conductive electrodes is less than or equal to an area of any one of the touch electrodes.
The capacitive touch screen of claim 1 wherein the polarity of the charge on said conductive electrode changes periodically.
The capacitive touch screen of claim 4, wherein when the touch electrode is touched, the amount of the induced charge on the touch electrode changes due to the touch, and the amount of the induced charge of the touch electrode changes to the conductive electrode. The charge changes to determine the position of the touched touch electrode.
The capacitive touch screen of claim 1 , wherein the touch electrode extends from one end of the capacitive touch screen to the opposite end, and the conductive electrode extends from one end of the capacitive touch screen to a position spaced apart from the other end.