TWM516190U - Dual-layer mutual capacitance touch electrode, touch panel and touch device - Google Patents

Description

Double-layer mutual capacitance touch electrode, touch screen and touch device

This creation belongs to the field of touch technology, in particular, it relates to a double-layer mutual capacitance touch electrode, a touch screen and a touch device.

The electrode pattern of the conventional double-layer mutual-capacitive touch screen supporting the passive pen is generally as shown in FIG. 1. In the two-layer matrix pattern, each driving channel 01 is composed of one vertical rectangular electrode unit, and each sensing channel 02 It consists of two horizontally thin rectangular electrode units. Since the contact area between the passive pen and the touch screen is small, when moving on the channel, the adjacent channel cannot be contacted, thereby causing no capacitance change during the movement, forming a blind spot, and the specific position of the passive pen cannot be judged. In turn, the program cannot track the trace of the pen (such as the trace shown by the circle in Fig. 2), and the aforementioned poor linearity and precision cause the line to bend. If the area of the electrode unit is to be reduced so that the traces of the passive pen are different, the number of channels is increased. On the one hand, the scanning frequency and the reporting rate are reduced. On the other hand, the number of channels is more complicated and the manufacturing process is more complicated. To the expensive IC. Therefore, it is necessary to improve the double-layer mutual capacitance electrode pattern to solve the above problem.

The purpose of this creation is to provide a double-layer mutual-capacitance touch electrode, which aims to improve touch precision and linearity without increasing the number of channels and IC cost, and without reducing the scanning frequency and the reporting rate.

The present invention is implemented as a double-layer mutual-capacitive touch electrode comprising a plurality of driving electrodes arranged side by side in a first direction and a plurality of sensing electrodes arranged side by side in a second direction, wherein the driving electrodes and the sensing electrodes are different The driving electrode comprises a channel trunk and a plurality of channel branches extending from the trunk of the channel to both sides, and the channel branches adjacent to the channel trunk intersect.

As a preferred technical solution for this creation:

The first direction and the second direction are perpendicular to each other.

The channel branch is comb-shaped, and includes a main line extending from the trunk of the channel and a plurality of branch lines extending parallel from the main line, and the branch lines of the two intersecting channel branches cross each other.

There is a hollow area between the branch lines of the channel branch and between the branch line and the channel trunk, and a filling block which is the same as the driving electrode material and is insulated from the driving electrode is provided in the hollow area.

The distance between the branch lines of the channel branch is 0.3 mm-0.4 mm;

The distance between the branches of the channel branches is 0.05 mm - 0.07 mm.

The channel branches are linear or curved.

The channel branches on both sides of one of the channel trunks are arranged offset or symmetrically.

Another object of the present invention is to provide a touch screen comprising at least a substrate and a touch electrode disposed on the substrate, wherein the touch electrode uses the double-layer mutual capacitance touch electrode.

Another object of the present invention is to provide an input device including the touch screen and a passive pen for inputting an operation command.

Because the channel branches of adjacent driving electrodes are crossed, the passive pen points can contact adjacent channels when they are on the touch electrodes, and the area of contact with adjacent channels is different during the moving process. The inductance of the power line is also different, and there will be different variations in the sense capacitance. Unlike the conventional electrode pattern, there is an inductive dead zone, and the linearity and accuracy are greatly improved. In addition, due to the characteristics of the channel crossing, it is possible to obtain a sufficiently high linearity and precision with a large sensing unit, thereby reducing the number of driving channels, thereby reducing the cost of the IC, increasing the driving scanning frequency and the reporting rate, and making the touch type The screen can sense the movement of the passive pen more accurately and quickly.

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

The specific implementation of this creation is described in detail below with reference to specific embodiments:

Referring to FIGS. 3-6, the present embodiment provides a double-layer mutual-capacitive touch electrode, which is a touch electrode supporting a passive pen, and includes a plurality of driving electrodes 1 and a plurality of edges arranged side by side in the first direction. The sensing electrodes 2 are arranged side by side in the second direction, and the first direction and the second direction are preferably perpendicular to each other or may be at other angles. The driving electrode 1 and the sensing electrode 2 are located at different levels, and are separated by an insulating layer. The driving electrode 1 in this embodiment includes a channel trunk 11 and a plurality of channel branches 12 extending from the channel trunk 11 to both sides, and the channel branches 12 of the adjacent channel trunks 11 intersect each other. The channel trunk 11 is generally a wide straight wire, the channel branches 12 are narrower and evenly arranged along the length of the channel trunk 11, and the adjacent channel branches 12 of the adjacent channel trunks 11 are crossed. of. The sensing electrode can adopt a straight structure which is easy to manufacture, and the plurality of sensing electrodes are arranged in parallel, and intersect with the driving electrode to form a mesh touch electrode structure, and the touch unit determined by one sensing electrode 2 and one driving electrode 1 is no longer Separately occupying one unit area, but adjacent touch units cross each other.

The double-layer mutual-capacitive touch electrode adopts a form in which the channel branches 12 of adjacent driving electrodes cross each other, and the passive pen point can contact the adjacent driving channel when the touch pen is on the touch electrode, and the adjacent channel during the moving process The size of the contact area is different, and the induction of the space power line is different. There will be different variations in the sense capacitance. Unlike the conventional electrode pattern, there is an inductive blind zone, and the linearity and accuracy are greatly improved. In addition, due to the characteristics of the channel crossing, it is possible to obtain a sufficiently high linearity and precision with a large sensing unit, thereby reducing the number of driving channels, thereby reducing the cost of the IC, increasing the driving scanning frequency and the reporting rate, and making the touch type The screen can sense the movement of the passive pen more accurately and quickly.

Referring further to Figures 4, 5, and 6, the channel branch 12 of the present embodiment preferably has a comb shape including a main line 121 extending from the passage trunk 11 and a plurality of branch lines 122 extending parallel from the main line 121. The two intersecting channel branches 12 are specifically crossed by the branch lines 122. Further, the main line 121 may be a straight line, or may be an arc shape or other regular shapes. The branch line 122 may also be a straight line, or may be an arc shape or other regular shapes, but it is necessary to ensure two adjacent channels. The legs of branch 12 can intersect. In this embodiment, at least one branch 122 of each channel branch 12 may be two, three, four or even more.

Of course, the present invention does not exclude the design of the channel branch 12 as a straight line, that is, a plurality of parallel lines extending from the channel trunk 11 to both sides as the channel branch 12, the channel branch 12 has no further branch line, and the adjacent channel trunk 11 The extended channel branches 12 intersect.

Further, there may be a hollow area between the branch lines 122 of the channel branch 12 and between the branch line 122 and the channel trunk 11. Taking the comb channel branch as an example, referring to FIG. 5, the branch line 122 of the channel branch 12 is narrow, and the branch line is The lines are sharp and clear, which may cause undesirable visual effects such as shadows, and there is a large blank area between the adjacent branch line 122 and the branch line 122 and the channel trunk 11, so that the same filling block 13 as the driving electrode material can be added in this area to Eliminating the optical effects of the spurs 122, it should be noted that the filler blocks are electrically insulated from the channels.

When the adjacent branch line 122 and the blank area between the branch line 122 and the channel trunk 11 are small, the hollow area may not be reserved between the branch lines and between the channel trunk and the branch line, as shown in FIG. 4 is a drive made by a silk screen process. The accuracy of the electrode and screen printing process is low, so the line of the channel branch 12 is wide, resulting in a small distance between the adjacent branch line 122 and the branch line 122 and the channel trunk 11, such as 0.3 mm-0.4 mm. Hollow area. As shown in FIG. 6 , the driving electrodes are formed by the yellow light process. In this embodiment, the number of the branch lines 122 is four, so the spacing between the adjacent branch lines 122 and the branch lines 122 and the channel trunk 11 is small, and may be 0.05 mm. -0.07mm. Therefore, there is no large hollow area. The structure shown in Fig. 5 has higher linearity and precision than the structure shown in Fig. 4, and is more suitable for the screen with larger LCD noise interference than the fourth figure.

Further, in this embodiment, the channel branches 12 on both sides of a channel trunk 11 are preferably arranged in a wrong position, so that the entire touch electrode formed has a better recognition effect on the touch action. Of course, this embodiment does not exclude the case where the channel branches 12 on both sides of the same channel trunk 11 are symmetrically arranged.

In this embodiment, the width of the channel trunk 11 may be 1.3 to 2 mm, which is usually slightly larger than the diameter of the pen tip of the passive pen. When the passive pen is placed on the touch screen and moved on the screen, the two driving channels are usually contacted. That is, the two touch units are touched, and the position and the movement track can be accurately sensed according to the change of the contact area with the different touch units.

The double-layer mutual-capacitive touch electrode provided by the present invention is suitable for a touch device. Therefore, the touch device includes at least one substrate and a touch electrode disposed on the substrate, and the touch electrode can be used. The double-layer mutual capacitance touch electrode provided by this creation. The touch device further includes other functional structures, such as a cover, a backlight module, a display module, and the like, which are not described in this embodiment.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement and improvement made within the spirit and principle of the present creation should be included in the protection of the present creation. Within the scope.

01‧‧‧Drive electrode
02‧‧‧Induction electrode
1‧‧‧Drive electrode
2‧‧‧Induction electrode
11‧‧‧ channel trunk
12‧‧‧Channel branch
121‧‧‧main line
122‧‧‧ branch line
13‧‧‧ Filling block

Figure 1 is an electrode pattern of a double-layer mutual capacitance touch screen in the prior art;

2 is a schematic view showing a state of use of a double-layer mutual capacitance touch screen in the prior art;

3 is a schematic structural view of a double-layer mutual-capacitive touch electrode provided by the present embodiment;

4 is a schematic structural view of a driving electrode of a double-layer mutual-capacitive touch electrode provided by the present embodiment (1);

FIG. 5 is a schematic structural view of a driving electrode of a double-layer mutual-capacitive touch electrode provided by the present embodiment (2);

FIG. 6 is a schematic structural view of a driving electrode of a double-layer mutual-capacitance touch electrode provided in the present embodiment (3).

1‧‧‧Drive electrode

122‧‧‧ branch line

12‧‧‧Channel branch

11‧‧‧ channel trunk

121‧‧‧main line

Claims (10)

A double-layer mutual-capacitance touch electrode includes a plurality of driving electrodes arranged side by side in a first direction and a plurality of sensing electrodes arranged side by side in a second direction, wherein the driving electrodes and the sensing electrodes are located at different levels, The drive electrode includes a channel trunk and a plurality of channel branches extending from the trunk of the channel to both sides, and the channel branches adjacent to the trunk of the channel intersect. The double-layer mutual-capacitive touch electrode according to claim 1, wherein the first direction and the second direction are perpendicular to each other. The double-layer mutual-capacitive touch electrode according to claim 1, wherein the channel branches are comb-shaped, and comprise a plurality of branch lines extending from a main line extending from the main stem of the channel and an autonomous line. The branch lines of the intersecting channel branches cross each other. The double-layer mutual-capacitive touch electrode according to claim 3, wherein a gap region between the branch lines of the channel branches and between the branch lines and the trunk of the channel is provided in the hollow area. A filler block having the same driving electrode material and insulated from the driving electrode. The double-layer mutual-capacitive touch electrode according to claim 3, wherein the distance between the branch lines of the channel branches is 0.3 mm-0.4 mm. The double-layer mutual-capacitive touch electrode according to claim 3, wherein the distance between the branch lines of the channel branches is 0.05 mm-0.07 mm. The double-layer mutual-capacitive touch electrode according to claim 1, wherein the channels are branched in a straight line or an arc shape. The double-layer mutual-capacitive touch electrode according to claim 1, wherein the channel branches on both sides of the trunk of the channel are arranged offset or symmetrically. A touch screen comprising at least one substrate and a touch electrode disposed on the substrate, wherein the touch electrode is double-layered according to any one of claims 1 to 8. Capacitive touch electrode. An input device comprising the touch screen of claim 9 and a passive pen for inputting an operation command.