CN107688414B

CN107688414B - Capacitive touch screen

Info

Publication number: CN107688414B
Application number: CN201610633135.0A
Authority: CN
Inventors: 王士敏; 李计考; 宋小来; 古海裕; 朱泽力; 李绍宗
Original assignee: Chongqing Laibao Technology Co ltd; Shenzhen Laibao Hi Tech Co Ltd
Current assignee: Chongqing Laibao Technology Co ltd; Shenzhen Laibao Hi Tech Co Ltd
Priority date: 2016-08-04
Filing date: 2016-08-04
Publication date: 2020-12-08
Anticipated expiration: 2036-08-04
Also published as: CN107688414A

Abstract

The invention relates to a capacitive touch screen which comprises a glass substrate, and a Y electrode conducting layer, an insulating layer and an X electrode conducting layer which are sequentially formed on one side of the glass substrate, wherein the X electrode conducting layer comprises an X channel electrode, the Y electrode conducting layer comprises a Y channel electrode, and each X channel electrode and each Y channel electrode comprise a plurality of sub-channels; each sub-channel comprises a first connecting end, a second connecting end and a middle section connected between the first connecting end and the second connecting end; the first connecting ends of the two opposite ends of each X-channel electrode and each Y-channel electrode cover the ink area, and the distance between the first connecting ends in the ink area and the middle section connected with the first connecting ends in the X-axis direction and/or the Y-axis direction is smaller than the distance between the second connecting ends and the middle section. The ink area of the capacitive touch screen covers the first connecting ends at the two opposite ends of the X-channel electrode and the Y-channel electrode, so that the distance between the first connecting ends in the ink area and the middle section connected with the first connecting ends is reduced, and the narrow-frame touch screen is obtained.

Description

Capacitive touch screen

Technical Field

The invention relates to the technical field of touch input, in particular to a capacitive touch screen.

Background

The touch screen is an induction type liquid crystal display device capable of receiving input signals of a contact and the like, when a graphic button on the screen is contacted, a touch feedback system on the screen can drive various connecting devices according to a pre-programmed program, a mechanical button panel can be replaced, and vivid video and audio effects can be produced by a liquid crystal display picture. The touch screen is a new terminal input device, is the simplest, convenient and natural man-machine interaction mode at present, and can be divided into various types according to technical principles, wherein the touch screen comprises a resistance type touch screen which is widely applied to terminals such as mobile phones, flat panels and the like.

As shown in fig. 6, a typical capacitive touch screen includes a functional area 10 and an ink area 30, where the functional area 10 is an area where electrodes are disposed on a conductive layer, the ink area 30 is disposed on a peripheral edge of a substrate glass and covers electrode leads around the electrodes, and a width of the ink area 30 determines a width of a frame of the touch screen.

In order to ensure the edge performance of the capacitive touch screen, the functional area 10 is usually extended into the ink area 30, and particularly, in some touch electrode designs supporting an active pen, the width of the ink covering the functional area 10 is half of the width of a sub-channel, and usually the width of one sub-channel is less than 5mm, so that for the touch screen supporting the active pen, the width of the ink covering the functional area 10 sometimes reaches 2.5mm, and in addition to the width of a metal lead wire of the touch screen, a cutting safety margin and the like, the edge ink area of the touch screen is wider, which affects the appearance. Moreover, the narrow frame in the market is more and more strongly required at present, the measures of reducing the lead and the like basically reach the process limit, and the frame cannot be further reduced.

Disclosure of Invention

Based on this, it is necessary to provide a capacitive touch screen which is advantageous for realizing a narrow bezel.

A capacitive touch screen comprises a glass substrate, and a Y-electrode conducting layer, an insulating layer and an X-electrode conducting layer which are sequentially formed on one side of the glass substrate, wherein the glass substrate comprises an ink area arranged at the edge of the glass substrate and a visible area enclosed in the ink area, the X-electrode conducting layer comprises a plurality of X-channel electrodes, the Y-electrode conducting layer comprises a plurality of Y-channel electrodes, and each X-channel electrode and each Y-channel electrode comprise a plurality of sub-channels; each sub-channel comprises a first connecting end, a second connecting end and a middle section connected between the first connecting end and the second connecting end; the middle section of each X-channel electrode coincides with the projection of the middle section of each corresponding Y-channel electrode on the glass substrate, the first connecting ends at the two opposite ends of each X-channel electrode and each Y-channel electrode cover the ink area, and the distance between the first connecting end in the ink area and the middle section connected with the first connecting end in the X-axis direction and/or the Y-axis direction is smaller than the distance between the corresponding second connecting end and the middle section in the X-axis direction and/or the Y-axis direction.

In general, the distance between the first connection end in the ink area of the capacitive touch screen and the middle section connected with the first connection end is equal to the distance between the corresponding second connection end and the middle section, and the distance between the first connection end in the ink area and the middle section connected with the first connection end is reduced by the capacitive touch screen, so that the width of the ink area of the capacitive touch screen can be narrowed, and the narrow-frame touch screen can be obtained.

In one embodiment, included angles between the first connection end of the X-channel electrode and the adjacent Y-channel electrode in the ink area, and projections of the first connection end of the Y-channel electrode and the adjacent X-channel electrode on the glass substrate are all first included angles, an included angle between projections of the X-channel electrode and the Y-channel electrode on the glass substrate in the visible area is a second included angle, and the first included angle is smaller than the second included angle.

In one embodiment, the X-channel electrode and the Y-channel electrode are both metal grids, and when the distance between the first connection end located in the ink area and the middle section connected thereto in the X-axis direction and/or the Y-axis direction is smaller than the distance between the corresponding second connection end and the middle section in the X-axis direction and/or the Y-axis direction, the density of the first connection end is greater than the density of the second connection end.

In one embodiment, when the distance between the first connection end located in the ink area and the middle section connected with the first connection end in the X-axis direction and/or the Y-axis direction is smaller than the distance between the corresponding second connection end and the middle section in the X-axis direction and/or the Y-axis direction, the first connection end is a metal block.

In one embodiment, the X channel electrode and the Y channel electrode are both of an ITO structure, and both the X channel electrode and the Y channel electrode include two oppositely arranged electrode wires, and the two oppositely arranged electrode wires form a plurality of sub-channels.

In one embodiment, the glass substrate is a square, and the distance between the first connection end and the middle section connected with the first connection end in the ink area where one or more sides of the square correspond is smaller than the distance between the corresponding second connection end and the middle section.

In one embodiment, the difference that the distance between the first connecting end in the ink area and the middle section connected with the first connecting end in the X-axis direction and/or the Y-axis direction is smaller than the distance between the corresponding second connecting end and the middle section in the X-axis direction and/or the Y-axis direction is greater than or equal to 0.78 mm.

In one embodiment, the electrode shapes of the X-channel electrode and the Y-channel electrode are both diamond patterns or straight stripe patterns.

Drawings

Fig. 1 is a schematic structural diagram of a capacitive touch screen according to a first embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the capacitive touch screen of FIG. 1;

FIG. 3 is a schematic structural diagram of a capacitive touch screen according to a first embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a capacitive touch screen according to a second embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a capacitive touch screen according to a fourth embodiment of the present invention;

fig. 6 is a schematic structural diagram of a conventional capacitive touch screen.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 and fig. 2, a capacitive touch panel 100 according to an embodiment of the invention includes a glass substrate 10, and a Y electrode conductive layer 20, an insulating layer 30, and an X electrode conductive layer 40 sequentially formed on one side of the glass substrate 10, where the glass substrate 10 includes an ink area 12 disposed on an edge thereof and a visible area 14 enclosed in the ink area 12, the X electrode conductive layer 40 includes a plurality of X channel electrodes 41, the Y electrode conductive layer 20 includes a plurality of Y channel electrodes 21, and each of the X channel electrodes 41 and each of the Y channel electrodes 21 includes a plurality of sub-channels 412; each sub-channel 412 includes a first connection end 4121, a second connection end 4123, and an intermediate section 4125 connected between the first connection end 4121 and the second connection end 4123; the middle section 4125 of each X channel electrode 41 coincides with the projection of the middle section 4125 of each corresponding Y channel electrode 21 on the glass substrate 10, the first connection ends 4121 at two opposite ends of each X channel electrode 41 and each Y channel electrode 21 cover the ink area 12, and the distance between the first connection end 4121 in the ink area 12 and the middle section 4125 connected thereto in the X axis direction and/or the Y axis direction is smaller than the distance between the corresponding second connection end 4123 and the middle section 4125 in the X axis direction and/or the Y axis direction.

In general, the distance between the first connection end 4121 in the ink area 12 and the middle section 4125 connected thereto is equal to the distance between the corresponding second connection end 4123 and the middle section 4125, and the capacitive touch screen 100 reduces the distance between the first connection end 4121 in the ink area 12 and the middle section 4125 connected thereto, so that the width of the ink area 12 of the capacitive touch screen 100 can be narrowed, thereby obtaining a narrow-frame touch screen.

Further, the distance between the first connection end 4121 and the middle section 4125 connected thereto in the ink area 12 in the X-axis direction and/or the Y-axis direction is smaller than the difference between the distance between the corresponding second connection end 4123 and the middle section 4125 in the X-axis direction and/or the Y-axis direction by 0.78mm or more, that is, the width of the reduction of the width of the reduction compared to the conventional ink area 50 is 0.78mm or more, thereby narrowing the bezel of the capacitive touch screen.

In the present embodiment, the electrode shapes of the X-channel electrodes 41 and the Y-channel electrodes 21 are both diamond patterns or straight stripe patterns. It is understood that in other embodiments, the shapes of the X-channel electrode and the Y-channel electrode may be other shapes, and are not limited herein. When the electrode shapes of the X-channel electrode 41 and the Y-channel electrode 21 are both diamond patterns, the first connection end 4121 of one sub-channel 412 on the X-channel electrode 41 and the Y-channel electrode 21 is spliced with the second connection end 4123 of another adjacent sub-channel 412 to form a diamond pattern.

Further, the X-channel electrode 41 and the Y-channel electrode 21 are both of a metal mesh or an ITO structure. As shown in fig. 3, when the X-channel electrode 41 and the Y-channel electrode 21 are both of ITO structures, the X-channel electrode 41 and the Y-channel electrode 21 both include two electrode lines disposed oppositely, and the two electrode lines form a plurality of sub-channels 412.

Since the distance between the first connection end 4121 and the middle section 4125 connected thereto in the ink area 12 is reduced while the capacitance in the ink area 12 is reduced, and the capacitance is proportional to the amount of signals that can be transmitted, so that the amount of signals transmitted from the X channel electrode 41 to the Y channel electrode 21 is reduced, thereby affecting the response speed of the touch screen, etc., the signal amount compensation can be performed on the narrowed first connection end 4121 in the following manner.

The signal compensation structure and method adopted by the first connection end 4121 will be described in detail below by taking the example of reducing the distance between the first connection end 4121 and the middle end 4125 in the ink region 12 in the X-channel electrode. The following signal compensation can also be performed on the Y channel electrodes in the same way, which is not described herein again and does not limit the scope of the present invention.

As shown in fig. 1 and 3, in the first embodiment of the present invention, the electrode shapes of the X channel electrode 41 and the Y channel electrode 21 are both diamond patterns, the X channel electrode 41 and the Y channel electrode 21 are both metal grids or ITO structures, an included angle between the first connection end 4121 of the X channel electrode 41 in the ink area 12 and the projection of the adjacent Y channel electrode 21 on the glass substrate 10 is a first included angle 121, an included angle between the projection of the X channel electrode 41 and the projection of the Y channel electrode 21 on the glass substrate 10 in the visible area 14 is a second included angle 141, the first included angle 121 is smaller than the second included angle 141, so as to increase the size of the first connection end 4121 in the ink area 12 in the Y axis direction (at this time, the first included angle 121 is correspondingly smaller) when the size of the first connection end 4121 in the X axis direction is smaller, so as to ensure that the total area of the changed first connection end 4121 is equal to the total area of the first connection end 4121 before being changed, to compensate for the reduced signal amount by the first connection terminal 4121 of the X-channel electrode 41 in the ink area 50 being narrowed.

Similarly, the first included angle 121 may be decreased for the Y-channel electrode 21 to compensate for the decreased signal amount caused by the narrowing of the first connection end 4121 of the Y-channel electrode 21 in the ink area 50.

As shown in fig. 4, in the second embodiment of the present invention, when the electrode shapes of the X channel electrode 41 and the Y channel electrode 21 are both diamond patterns, and both the X channel electrode 41 and the Y channel electrode 21 are metal grids, the grid density of the first connection end 4121 of the X channel electrode 41 in the ink area 12 can be increased while the first included angle 121 in the ink area 12 is decreased, and the capacitance in the ink area 12 can be increased by increasing the density of the metal grids, so that the transmittable signal amount reduced by the narrowing of the first connection end 4121 of the X channel electrode 41 can be compensated.

Similarly, the first included angle 121 may be decreased and the grid density of the first connection ends 4121 may be increased for the Y-channel electrodes 21 to compensate for the decreased signal amount caused by the narrowing of the first connection ends 4121 of the Y-channel electrodes 21 in the ink area 50.

In the third embodiment of the present invention, when the electrode shapes of the X-channel electrode 41 and the Y-channel electrode 21 are both diamond patterns or straight bar patterns, and both the X-channel electrode 41 and the Y-channel electrode 21 are metal grids, the density of the first connection end 4121 of the X-channel electrode 41 in the ink area 12 is greater than the density of the second connection end 4123, increasing the density of the metal grids can increase the capacitance in the ink area 12, and further increase the signal amount transmitted by the X-channel electrode 41 to the Y-channel electrode 21, so as to compensate the transmittable signal amount caused by the narrowing and decreasing of the width of the first connection end 4121 of the X-channel electrode 41 in the ink area 12, and thus the frame width of the capacitive touch screen of the metal grids can be reduced.

Similarly, the first connection ends 4121 of the Y-channel electrodes 21 may be increased in density to compensate for the decreased signal amount caused by the narrowing of the first connection ends 4121 of the Y-channel electrodes 21 in the ink area 50.

In the fourth embodiment of the present invention, when the electrode shapes of the X-channel electrode 41 and the Y-channel electrode 21 are both diamond patterns or straight bars, and the X-channel electrode 41 and the Y-channel electrode 21 are both metal grids, the width of the ink area 12 is reduced, and the first connection end 4121 in the ink area 12 is directly set as a metal block, which can also compensate the transmittable signal amount of the narrowing of the first connection end 4121 in the ink area 12. Specifically, as shown in fig. 5, the structure of the embodiment is schematically illustrated when the electrode shapes of the X channel electrode 41 and the Y channel electrode 21 are both diamond patterns.

Similarly, the first connection terminal 4121 of the Y-channel electrode 21 may be directly set as a metal block for the Y-channel electrode 21 to compensate for the reduced signal amount by narrowing the first connection terminal 4121 of the Y-channel electrode 21 in the ink area 50.

Specifically, the glass substrate 10 is square, and the distance between the first connection end 4121 and the middle section 4125 connected thereto in the ink area 12 corresponding to one side of the square is smaller than the distance between the corresponding second connection end 4123 and the middle section 4125. It can be understood that the distance between the first connection end 4121 and the middle section 4125 connected thereto in the ink area 12 at the corresponding position of two, three, and four sides of the square may also be smaller than the distance between the corresponding second connection end 4123 and the middle section 4125, and it is generally necessary to reduce the frame width of the left and right sides in the X-axis direction, and sometimes it is also necessary to reduce the frame width of the bottom side in the Y-axis direction, and specifically, the frame width at the corresponding position may be reduced according to actual requirements, which is not limited herein.

Similarly, the shape of the glass substrate 10 may be other shapes such as a circle, and the width of the frame at the corresponding position may be reduced according to actual requirements by the signal compensation method, which is not limited herein.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A capacitive touch screen is characterized by comprising a glass substrate, and a Y electrode conducting layer, an insulating layer and an X electrode conducting layer which are sequentially formed on one side of the glass substrate, wherein the glass substrate comprises an ink area arranged at the edge of the glass substrate and a visible area enclosed in the ink area, the X electrode conducting layer comprises a plurality of X channel electrodes, the Y electrode conducting layer comprises a plurality of Y channel electrodes, and each X channel electrode and each Y channel electrode comprise a plurality of subchannels; each sub-channel comprises a first connecting end, a second connecting end and a middle section connected between the first connecting end and the second connecting end; the middle section of each X-channel electrode coincides with the projection of the middle section of each corresponding Y-channel electrode on the glass substrate, the first connecting ends at the two opposite ends of each X-channel electrode and each Y-channel electrode cover the ink area, and the distance between the first connecting end in the ink area and the middle section connected with the first connecting end in the X-axis direction and/or the Y-axis direction is smaller than the distance between the corresponding second connecting end and the middle section in the X-axis direction and/or the Y-axis direction;

the first connecting end of the X-channel electrode and the adjacent Y-channel electrode in the ink area, and the first connecting end of the Y-channel electrode and the projection of the adjacent X-channel electrode on the glass substrate are all first included angles, the included angle between the projection of the X-channel electrode and the projection of the Y-channel electrode on the glass substrate in the visible area is a second included angle, and the first included angle is smaller than the second included angle.

2. The capacitive touch screen according to claim 1, wherein the X-channel electrodes and the Y-channel electrodes are metal grids, and when a distance between the first connection end located in the ink area and the middle section connected thereto in the X-axis direction and/or the Y-axis direction is smaller than a distance between the corresponding second connection end and the middle section in the X-axis direction and/or the Y-axis direction, a density of the first connection end is greater than a density of the second connection end.

3. A capacitive touch screen according to claim 1, wherein when the distance between the first connection end located in the ink area and the middle section connected thereto in the X-axis direction and/or the Y-axis direction is smaller than the distance between the corresponding second connection end and the middle section in the X-axis direction and/or the Y-axis direction, the first connection end is a metal block.

4. The capacitive touch screen according to claim 1, wherein the X-channel electrode and the Y-channel electrode are both of an ITO structure, and each of the X-channel electrode and the Y-channel electrode includes two oppositely disposed electrode wires, and the two oppositely disposed electrode wires form a plurality of sub-channels.

5. A capacitive touch screen according to claim 1, wherein the glass substrate is square, and the distance between the first connection end and the middle section connected thereto in the ink area at one or more sides of the square is smaller than the distance between the corresponding second connection end and the middle section.

6. A capacitive touch screen according to claim 1, wherein the difference between the first connection end in the ink area and the middle section connected thereto in the X-axis direction and/or the Y-axis direction, which is smaller than the difference between the corresponding second connection end and the middle section in the X-axis direction and/or the Y-axis direction, is greater than or equal to 0.78 mm.

7. A capacitive touch screen according to claim 1, wherein the electrode shapes of the X-channel electrodes and the Y-channel electrodes are both diamond patterns or straight bar patterns.