CN107831940B - Touch Device with ESD Protection - Google Patents

Abstract

A touch device with electrostatic protection capability includes a touch panel, a driving circuit, a plurality of driving signal lines and a plurality of grounding lines. The touch panel includes a plurality of touch units, and the plurality of touch units are arranged in an array shape with a plurality of rows and columns. A plurality of signal lines are coupled to the driving circuit, and are respectively coupled to each touch unit in a corresponding column of the touch panel, wherein the driving circuit is used for sequentially driving the plurality of signal lines through the plurality of signal lines Multiple touch units. Each of the plurality of ground lines is adjacent to two corresponding signal lines of the plurality of signal lines. The touch device can reduce the probability of electrostatic discharge occurring on the driving signal lines to less than ten percent. In addition, when the driving signal line is bent, the grounding line can also be bent, so the touch device can maintain a good electrostatic protection capability under the condition of a narrow frame design.

Description

Touch Device with ESD Protection

technical field

The present disclosure relates to a touch device, especially a touch device with electrostatic protection capability.

Background technique

In recent years, in order to improve the controllability and aesthetics of touch devices, narrow bezel designs have become a trend. Inverting the signal lines around the touch device to one side of the touch device is a design method that can effectively reduce the thickness of the frame. However, the conventional electrostatic discharge protection circuit includes transistors and capacitors, so that the conventional electrostatic discharge protection circuit has no flexibility and cannot be folded back.

SUMMARY OF THE INVENTION

In view of this, it is a problem to be solved in the industry how to provide a touch device that is suitable for a narrow frame design and has electrostatic protection capability.

An embodiment of the present disclosure relates to a touch device with electrostatic protection capability. The touch device includes a touch panel, a driving circuit, a plurality of signal lines and a plurality of ground lines. The touch panel includes a plurality of touch units, and the plurality of touch units are arranged in an array shape with a plurality of rows and columns. A plurality of signal lines are coupled to the driving circuit, and are respectively coupled to each touch unit in a corresponding column in the touch panel, wherein the driving circuit is used for sequentially driving the plurality of signal lines through the plurality of signal lines Multiple touch units. Each of the plurality of ground lines is adjacent to two corresponding signal lines of the plurality of signal lines.

In some embodiments, each of the plurality of signal lines is adjacent to two corresponding ground lines of the plurality of ground lines.

In some embodiments, a wire width of each of the plurality of ground lines is at least 90 percent of a separation distance between the two corresponding signal lines.

In some embodiments, a wire width of each of the plurality of ground lines is greater than a wire width of each of the plurality of signal lines.

In some embodiments, a maximum wire width of each of the plurality of ground wires is at least 3.6 mm.

In some embodiments, a wire length of each of the plurality of ground wires is approximately equal to a wire length of one of the two corresponding signal wires.

In some embodiments, a plurality of insulating layers are further included, each covering a corresponding signal line of the plurality of signal lines.

In some embodiments, a plurality of conductive connection layers are further included, each of which is used to couple the two ground lines separated by only one signal line from each other, and each is alternately arranged with a corresponding insulating layer.

In some embodiments, each of the plurality of signal lines is provided with a plurality of protrusions.

In some embodiments, the distance from the tip of each protrusion to the ground line closest to the protrusion is between 10 μm and 50 μm.

One of the advantages of the above embodiments is that the touch device can reduce the probability of electrostatic discharge occurring on the driving signal lines to less than ten percent.

Another advantage of the above embodiments is that when the driving signal line is bent, the grounding line can also be bent, so the touch device can maintain a good electrostatic protection capability in the case of a narrow frame design.

Description of drawings

In order to make the above and other objects, features, advantages and embodiments of the disclosure document more clearly understood, the accompanying drawings are described as follows:

FIG. 1 is a simplified functional block diagram of a touch device with electrostatic protection capability according to an embodiment of the present disclosure.

FIG. 2 is a partially enlarged functional block diagram of the first direction signal line and the ground line of the touch device of FIG. 1 .

3 is a partially enlarged functional block diagram of a first direction signal line and a ground line of a touch device according to another embodiment of the present disclosure.

4 is a partially enlarged functional block diagram of a first direction signal line and a ground line of a touch device according to another embodiment of the present disclosure.

FIG. 5 is a simplified functional block diagram of a touch device with electrostatic protection capability according to another embodiment of the present disclosure.

Reference number:

100, 300, 400, 500: touch device

110: Touch Panel

120: first direction drive circuit

130, 530: first direction signal line

140: Second direction drive circuit

150, 550: the second direction signal line

160, 560: ground wire

170: first direction touch unit

180: second direction touch unit

310: Insulation layer

320: Conductive connection layer

410: Protrusions

Detailed ways

The embodiments of the present invention will be described below with reference to the relevant drawings. In the drawings, the same reference numbers refer to the same or similar components or method flows.

FIG. 1 is a simplified functional block diagram of a touch device 100 with electrostatic protection capability according to an embodiment of the present disclosure. As shown in FIG. 1 , the touch device 100 includes a touch panel 110 , a first direction driving circuit 120 , a plurality of first direction signal lines 130 , a second direction driving circuit 140 , and a plurality of second direction signal lines 150 . and a plurality of ground lines 160 (shown in phantom). The touch panel 110 includes a plurality of first-direction touch units 170 and a plurality of second-direction touch units 180, and the first-direction touch units 170 and the second-direction touch units 180 are arranged in a plurality of rows and columns. array shape. The plurality of first direction signal lines 130 are respectively coupled to all the first direction touch units 170 in a corresponding column, and the first direction driving circuit 120 sequentially drives (or reads out) the plurality of first direction signal lines 130 Take) the first-direction touch unit 170 in the touch panel 110 . The plurality of second-direction signal lines 150 are respectively coupled to all the second-direction touch units 170 in a corresponding row, and the second-direction driving circuit 140 is sequentially driven through the plurality of second-direction signal lines 150 (or Read) the second direction touch unit 180 in the touch panel 110 . Each ground wire 160 is used for transferring the electrostatic charge accumulated in the touch device 100 to a corresponding ground point, so as to prevent the touch device 100 from being damaged by unexpected electrostatic discharge.

FIG. 2 is a partially enlarged functional block diagram of the first direction signal line 130 and the ground line 160 of the touch device 100 of FIG. 1 . As shown in FIG. 2 , the plurality of ground lines 160 and the plurality of first-direction signal lines 130 are arranged at intervals to prevent accumulated static charges from penetrating the first-direction signal lines 130 and penetrating the internal components of the touch device 100 . That is, each The first direction signal lines 130 are adjacent to two corresponding ground lines 160 , and each ground line 160 is also adjacent to two corresponding first direction signal lines 130 . The first direction signal lines 130 have a relatively thin wire width, and any two closest first direction signal lines 130 have a relatively wide interval. Therefore, the wire width of the ground wire 160 may be greater than the wire width of the first direction signal wire 130 .

In this embodiment, the wire width of the ground wire 160 disposed between the first direction signal wires 130 is at least 9% of the distance between the two first direction signal wires 130 adjacent to the ground wire 160 ten. The wire length of each ground wire 160 is similar to the wire length of one of the two first direction signal wires 130 adjacent to the ground wire 160 . That is, each ground line 160 extends from the vicinity of the connection between the first-direction signal line 130 and the touch panel 110 and from the vicinity of the connection between the first-direction signal line 130 and the first-direction driving circuit 120 to connect the first direction signal line 130 to the first direction driving circuit 120 . The area traversed by the direction signal line 130 provides complete electrostatic protection. As a result, if electrostatic discharge (ESD) occurs in the regions where the plurality of first-direction signal lines 130 and the plurality of ground lines 160 are located, there is a 90% chance that the phenomenon occurs on the ground lines 160 . above.

In practice, in some embodiments, the wire width of the first direction signal line 130 is 0.1 mm, and the maximum distance between two first direction signal lines 130 adjacent to any ground line 160 is 4 mm. Therefore, the maximum wire width of the ground wire 160 may be set to at least 3.6 mm (eg, 3.8 mm).

In other embodiments, the ground lines 160 of the touch device 100 may also be arranged at intervals from the second direction signal lines 150 , that is, each second direction signal line 150 is adjacent to two corresponding ground lines 160 . Moreover, the wire width of the ground wire 160 disposed between the second direction signal wires 150 is at least 90% of the distance between the two second direction signal wires 150 adjacent to the ground wire 160 .

FIG. 3 is a partially enlarged functional block diagram of the first direction signal line 130 and the ground line 160 of the touch device 300 according to another embodiment of the present disclosure. The operations and advantages of many functional blocks in the touch device 300 are similar to those of the touch device 100 , except that the touch device 300 further includes a plurality of insulating layers 310 and a plurality of conductive connection layers 320 .

As shown in FIG. 3 , the plurality of ground lines 160 and the plurality of first direction signal lines 130 of the touch device 300 are arranged at intervals, that is, a ground line 160 is disposed between every two adjacent first direction signal lines 130 . The plurality of insulating layers 310 are used to cover the exposed portion of the first direction signal line 130 . Specifically, each of the plurality of insulating layers 310 covers a corresponding first direction signal line 130 and partially covers the two ground lines 160 adjacent to the aforementioned corresponding first direction signal line 130 . In this way, compared with the touch device 100 , the touch device 300 can further prevent the electrostatic discharge phenomenon from occurring on the first direction signal line 130 by the insulating layer 310 .

In some embodiments, the ground lines 160 of the touch device 300 may also be arranged at intervals from the second direction signal lines 150 , that is, each second direction signal line 150 is adjacent to two corresponding ground lines 160 . Moreover, each of the plurality of second direction signal lines 150 is covered by a corresponding insulating layer 310 .

The conductive connection layer 320 is used to couple the two ground lines 160 separated by only one first direction signal line 130 or one second direction signal line 150 to each other, and each conductive connection layer 320 partially covers a corresponding insulating layer 210. That is, each conductive connection layer 320 is staggered with a corresponding insulating layer 210 , and is also staggered with a corresponding first-direction signal line 130 or second-direction signal line 150 . In this way, each ground wire 160 is coupled to each other in series through the conductive connection layer 320 . Therefore, compared with the touch device 100 , the touch device 300 can reduce the number of ground points, thereby reducing the difficulty of wiring design of the touch device 300 .

FIG. 4 is a partially enlarged functional block diagram of the first direction signal line 130 and the ground line 160 of the touch device 400 according to another embodiment of the present disclosure. The operation modes and advantages of many functional blocks in the touch device 400 are similar to those of the touch device 100 , except that the plurality of first direction signal lines 130 of the touch device 400 are respectively provided with a plurality of protrusions 410 . As shown in FIG. 5 , the ground lines 160 and the first direction signal lines 130 of the touch device 400 are arranged at intervals, that is, a ground line 160 is disposed between every two adjacent first direction signal lines 130 . The tip of each protruding portion 410 faces the ground line 160 closest to the protruding portion 410 , so that the electrostatic charge accumulated on the first direction signal line 130 corresponding to the protruding portion 410 can be easily released to the adjacent grounding portion Line 160.

In some embodiments, the ground lines 160 of the touch device 400 may also be arranged at intervals from the second direction signal lines 150 , that is, each second direction signal line 150 is adjacent to two corresponding ground lines 160 . In addition, a plurality of protrusions 410 are respectively provided on the plurality of second direction signal lines 150 of the touch device 400 .

In practice, the distance from the tip of the protruding portion 410 to the ground line 130 closest to the protruding portion 410 can be set to be between 10 μm and 50 μm. In addition, the protruding portions 410 can be arranged symmetrically or staggered, and the number of the protruding portions 410 can be adjusted according to actual needs.

FIG. 5 is a simplified functional block diagram of a touch device 500 with electrostatic protection capability according to another embodiment of the present disclosure. As shown in FIG. 5 , the touch device 500 includes a touch panel 110 , a first direction driving circuit 120 , a plurality of first direction signal lines 530 , a second direction driving circuit 140 , and a plurality of second direction signal lines 550 . and a plurality of ground lines 560. The operation modes and advantages of many functional blocks in the touch device 500 are similar to those of the touch device 100, which will not be repeated here. At least two second direction signal lines 550 are provided.

The wire width of each ground line 560 disposed between the first direction signal lines 530 is at least 90% of the distance between the two first direction signal lines 530 adjacent to the ground line 560 . The wire width of each ground line 560 disposed between the second direction signal lines 550 is at least 90% of the distance between two second direction signal lines 550 adjacent to the ground line 560 .

In some embodiments, the first direction signal line 530 or the second direction signal line 550 between two adjacent ground lines 560 may be covered by a corresponding insulating layer (not shown in the figure) to further The electrostatic discharge phenomenon is prevented from occurring on the first direction signal line 130 .

In other embodiments, two ground lines 560 separated by only one first direction signal line 530 or second direction signal line 550 can be coupled to each other through a conductive connection layer (not shown in the figure) are coupled to each other. In this way, all the ground lines 560 can be coupled together in series through the conductive connection layer, thereby reducing the number of ground points.

In practice, the aforementioned first direction signal lines 130 and 530 , second direction signal lines 150 and 550 , and ground lines 160 and 560 can be bent to one side of the touch panel 110 to save the space required for the overall circuit.

For example, in some embodiments, the first and second direction signal lines and the ground lines are disposed on a flexible printed circuit (FPC), so the first and second direction signal lines can be And the ground wire is bent to one side of the touch panel, so that the first and second direction signal wires and the ground wire overlap the touch panel, thereby saving the overall circuit area of the touch device and achieving a narrow frame design. In addition, in the case where the first and second direction signal lines and the ground line are all bent, the relative position between the first direction signal line and the ground line does not change, and the relative position between the second direction signal line and the ground line does not change. The position has not changed, so the touch device still has good electrostatic protection.

To sum up, the touch devices 100 , 300 , 400 and 500 are configured by disposing the large-area ground lines 160 and 560 between the first direction signal lines 130 and 530 and/or the second direction signal lines 150 and 550 . The probability of electrostatic discharge occurring on the first direction signal lines 130 and 530 and/or the second direction signal lines 150 and 550 can be reduced to less than ten percent.

In addition, when the first direction signal lines 130 and 530 and the second direction signal lines 150 and 550 in the touch devices 100 , 300 , 400 and 500 are bent in order to realize the narrow frame design, the ground lines 160 and 560 are also bent. Can be bent. Therefore, the touch devices 100 , 300 , 400 and 500 can maintain a good electrostatic protection capability in the case of a narrow frame design.

Certain terms are used in the specification and claims to refer to specific components. However, those skilled in the art should understand that the same components may be referred to by different nouns. The description and the scope of the patent application do not use the difference in name as a way of distinguishing components, but use the difference in function of the components as a basis for distinguishing. The "comprising" mentioned in the description and the scope of the patent application is an open-ended term, so it should be interpreted as "including but not limited to". In addition, "coupled" herein includes any direct and indirect means of connection. Therefore, if it is described in the text that the first component is coupled to the second component, it means that the first component can be directly connected to the second component through electrical connection or signal connection such as wireless transmission or optical transmission, or through other components or connections. Means are indirectly electrically or signally connected to the second component.

As used herein, the description "and/or" includes any combination of one or more of the listed items. In addition, unless otherwise specified in the specification, any term in the singular also includes the meaning in the plural.

The above are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.

Claims (6)

1. A touch device with electrostatic protection capability, characterized in that, comprising: a touch panel, comprising a plurality of touch units, and the plurality of touch units are arranged in an array shape with a plurality of rows and columns; a drive circuit; A plurality of signal lines are coupled to the driving circuit, and each is coupled to each touch unit in a corresponding column of the touch panel, wherein the driving circuit is used for sequentially driving through the plurality of signal lines the plurality of touch units; a plurality of ground lines, each adjacent to two corresponding signal lines in the plurality of signal lines; a plurality of insulating layers, each covering a corresponding signal line in the plurality of signal lines; a plurality of conductive connection layers, each used for coupling two ground wires separated by only one signal wire from each other, and each is staggered with a corresponding insulating layer; Wherein, a wire width of each of the plurality of ground wires is at least 90% of an interval distance between the two corresponding signal wires; Wherein, a wire length of each of the plurality of ground wires is similar to a wire length of one of the two corresponding signal wires. 2 . The touch device of claim 1 , wherein each of the plurality of signal lines is adjacent to two corresponding ground lines among the plurality of ground lines. 3 . 3 . The touch device of claim 1 , wherein a wire width of each of the plurality of ground lines is greater than a wire width of each of the plurality of signal lines. 4 . 4 . The touch device of claim 1 , wherein a maximum wire width of each of the plurality of ground wires is at least 3.6 mm. 5 . 5 . The touch device of claim 1 , wherein a plurality of protrusions are respectively provided on the plurality of signal lines. 6 . 6 . The touch device of claim 5 , wherein the distance from the tip of each protruding portion to the ground line closest to the protruding portion is between 10 μm and 50 μm. 7 .

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