TWI609304B - Touch panel - Google Patents

Description

Touch panel

The invention relates to a touch panel.

In each of the conductive structures of the existing touch panel, one of the electrode electrodes needs to be led out from the visible area, and each of the common electrodes needs to be led out from the visible area through an electrode lead, so that the electrode lead in the visible area occupies a large area. The touch blind area is large, and the user experience is poor.

In view of the above, it is necessary to provide a touch panel including: a substrate; a sensing electrode structure formed on the substrate for detecting a touch position; and a connection line formed on the substrate, including a plurality of a connection line and a plurality of second connection lines, wherein the plurality of first and second connection lines are used to connect the sensing electrode structure to transmit a touch sensing signal; the sensing electrode structure includes a plurality of intervals Arranging a first sensing electrode serial and a second sensing electrode serial, each first sensing electrode serial comprising a plurality of first sensing electrodes, each second sensing electrode serial comprising a plurality of second a sensing electrode, each of the first sensing electrodes interacting with an adjacent one of the second sensing electrodes to detect a touch position, wherein at least two first sensing electrodes adjacent to each of the first sensing electrode series The touch sensing signals are transmitted through a series connection, and the plurality of second sensing electrodes of each of the second sensing electrode series are connected in series and transmitted through a second connection line. Use the signal.

A touch panel includes: a substrate; sensing current formed on the substrate a pole structure for detecting a position touched by a user; and a connection line formed on the substrate, comprising a plurality of first connection lines and a plurality of second connection lines, the plurality of first and second connections The line is configured to connect the sensing electrode structure to transmit a touch sensing signal; the sensing electrode structure includes a plurality of spaced apart first sensing electrode serials and second sensing electrode serials, each of the first A sensing electrode series includes a plurality of first sensing electrodes, each second sensing electrode series includes a plurality of second sensing electrodes, each of the first sensing electrodes and a second sensing electrode adjacent thereto Interacting with each other to detect a touch position, wherein a first sensing electrode of each of the first sensing electrode serials is connected in series, and at least two first sensing electrodes are a group, and a first sense in each group The measuring electrode transmits the touch sensing signal through a first connecting line.

The touch panel is connected in series through at least two first sensing electrodes through a connecting line, so that the number of connecting lines can be greatly reduced, thereby reducing the size of the flexible circuit board structure of the touch panel, and The number of connecting lines in the panel display area is also relatively small, thereby reducing the touch dead zone and improving the user experience.

1‧‧‧ touch device

10‧‧‧Touch panel

10a‧‧‧ display area

10b‧‧‧Border area

20‧‧‧ display panel

1a‧‧‧ touch surface

11‧‧‧Substrate

12‧‧‧Sensor electrode structure

13‧‧‧Connected lines

14‧‧‧Soft circuit board structure

121‧‧‧First sensing electrode series

122‧‧‧Second sensing electrode series

131‧‧‧First cable

132‧‧‧second cable

210, 211, 212, 213, 214, 215, 216‧‧‧ first sensing electrodes

220, 221, 222, 223, 224, 225, 226‧‧‧ second sensing electrodes

311‧‧‧First connecting wire

312‧‧‧Second connecting wire

C1, C2, C3‧‧‧ capacitors

R1, R2, R3‧‧‧ resistance

220a, 220b‧‧‧second sensing electrode section

132a, 132b‧‧‧ connecting lines

1 is a top plan view of a touch device according to an embodiment of the present invention.

2 is a schematic view showing the side structure of the touch device.

3 is a top plan view of the first preferred embodiment of the touch panel of FIG. 1.

4 is an equivalent schematic view of the touch panel of FIG. 3.

FIG. 5 is a top plan view of a second preferred embodiment of the touch panel of FIG. 1. FIG.

6 is a top plan view of a third preferred embodiment of the touch panel of FIG. 1.

7 is a top plan view of a fourth preferred embodiment of the touch panel of FIG. 1.

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein the present invention is described by taking a bottom gate type thin film transistor as an example.

Please refer to FIG. 1 . FIG. 1 is a top view of a touch device 1 according to an embodiment of the present invention. The touch panel 1 includes a touch panel 10, and the touch panel 10 includes a light-transmissive display area 10a located at an intermediate position of the touch panel 10 and located at the The bezel area 10b around the display area 10a. The display area 10a is a light transmissive area for displaying an image. The bezel area 10b is a non-transparent area located at the periphery of the display area 10a. The display area 10a is an area where the touch device 1 performs a touch operation.

Please refer to FIG. 2 , which is a schematic diagram of the side structure of the touch device 1 . The touch device 1 includes a touch panel 10 and a display panel 20 . The touch panel 10 is located on the display surface side of the display panel 20 . In the embodiment, the touch panel 10 is located on the display surface side of the display panel 20 . The surface of the touch panel 10 away from the display panel 20 is the touch surface 1 a of the touch device 1 . The display area of the display panel 20 corresponds to the display area 10a, and the external circuit of the display panel 20 corresponds to the frame area 10b. The touch panel 10 covers the entire display panel 20 . In the embodiment, the touch panel 10 is a capacitive touch panel.

Please refer to FIG. 3 . FIG. 3 is a schematic structural diagram of the touch panel 10 in the touch device 1 . The touch panel 10 includes a substrate 11 and a sensing electrode structure 12 , a connecting line 13 , and a flexible circuit board structure 14 formed on the substrate 11 . The sensing electrode structure 12 is configured to detect a position touched by a user. The connecting line 13 is configured to connect the sensing electrode structure 12 to the flexible circuit board structure 14 for transmitting a signal for touch sensing. The flexible circuit board structure 14 is used to connect an external driving circuit (not shown) to provide an electrical signal to the sensing electrode structure 12. In the embodiment, the sensing electrode structure 12 is correspondingly disposed in the display area 10a, and the flexible circuit board structure 14 is correspondingly disposed in the frame area 10b. The sensing electrode structure 12, the connection line 13, and the flexible circuit board structure 14 are formed on the same surface of the same substrate 11. Preferably, the surface is a surface of the substrate 11 remote from the display panel 20.

The sensing electrode structure 12 includes a plurality of first sensing electrode serials 121 and a second sensing electrode serial array 122. The connecting circuit 13 includes a first connecting line 131 and a second connecting line 132. The first connection line 131 is connected to the first sensing electrode serial array 121, and the second connection line 132 is connected to the second sensing electrode serial array 122. Each of the first sensing electrode serials 121 includes a plurality of first sensing electrodes 210 , and each of the second sensing electrode serials 122 includes a plurality of second sensing electrodes 220 . Each of the first sensing electrodes 210 and a second sensing electrode 220 adjacent thereto form a sensing group, and the first sensing electrode 210 and the second sensing electrode in each sensing group 220 cooperate to detect the touch of the user position. The adjacent three first sensing electrodes 210 of each of the first sensing electrode serials 121 are grounded in series, and are connected to the flexible circuit board structure 14 through a first connecting line 131. The second sensing electrodes 220 of each of the second sensing electrode serials 121 are connected in series and connected to the flexible circuit board structure 14 through a second connecting line 132.

Referring to FIG. 4 , in the embodiment, a first sensing electrode serial 121 and a second sensing electrode serial 122 are included, and the first sensing electrode serial 121 includes six first senses. The measuring electrode 210 will be described. It can be understood that the sensing electrodes of the sensing electrode structure 12 of the actual touch panel 10 are much larger than this. The first sensing electrode series 121 includes first sensing electrodes 211, 212, 213, 214, 215, 216, and the corresponding second sensing electrode serials 121 includes a second sensing electrode 221, 222, 223, 224, 225, 226, the first connecting line 131 includes a first connecting wire 311 and a second connecting wire 312. The first sensing electrode 211 is connected to the flexible circuit board structure 14 through the first connecting wire 311, the first sensing electrodes 211, 212, 213 are connected in series, and the first sensing electrode 213 is grounded; The first sensing electrode 214 is connected to the flexible circuit board structure 14 through a first connecting line 312. The first sensing electrodes 214, 215, 216 are connected in series, and the first sensing electrode 216 is grounded. The second sensing electrodes 221 , 222 , 223 , 224 , 225 , 226 are connected in series through the second connecting line 132 and connected to the flexible circuit board structure 14 . An electric field is formed between the first sensing electrode 211 and the second sensing electrode 221 to form a capacitor C1, and an electric field is formed between the first sensing electrode 212 and the second sensing electrode 222 to form an electric field. A capacitor C2 forms an electric field between the first sensing electrode 213 and the second sensing electrode 223 to form a mutual capacitance C3. Since the first sensing electrodes 211, 212, 213 are connected in series, when the first connecting wire 311 emits a driving signal and the voltage of the driving signal is A, the voltage of the first sensing electrode 211 is A, the first The voltage of the sensing electrode 212 is 2 A/3, and the voltage of the first sensing electrode 213 is A/3. Since the voltages of the first sensing electrodes 211, 212, and 213 are different, an electric field is formed between the first sensing electrode 211 and the second sensing electrode 221, and the first sensing electrode An electric field is formed between the 212 and the second sensing electrode 222, and an electric field is formed between the first sensing electrode 213 and the second sensing electrode 223. The capacitances C1, C2, and C3 are different. The capacitance values are also different. Therefore, the second sensing electrodes 221, 222, and 223 respectively output different sensing signals, and similarly, the second sensing electrodes 224, 225 and 226 also output different sensing signals respectively. Further, touch sensing can be implemented on different first sensing electrodes 211, 212, 213, 214, 215, and 216.

Compared with the structure in which the flexible circuit board structure and the first sensing electrode are connected in a one-to-one manner, the touch device provided by the first embodiment of the present invention is connected through a connection in series. The wires are connected to the flexible circuit board structure so that the number of connecting wires can be reduced by about two-thirds, thereby making it possible to reduce the size of the flexible circuit board structure. Moreover, since the number of connecting lines in the display area 10a is relatively small, the touch dead zone is less, and the user experience is improved.

It can be understood that the touch device in the above embodiment uses three first sensing electrodes connected in series and connected to the flexible circuit board structure through a connecting line. In other implementations, there may be several, such as two or four. The first sensing electrodes 210 are grounded in series and connected to the flexible circuit board structure through a connecting line.

Referring to FIG. 5 , the touch device 1 provided by the second embodiment of the present invention is substantially the same as the touch device 1 provided by the first embodiment. The main difference between the touch device 1 provided by the second embodiment and the touch device 1 provided by the first embodiment is that, in the first embodiment, each of the first sensing electrode serials 121 is The adjacent three first sensing electrodes 210 are directly connected in series and grounded, and in the second embodiment, the middle of the adjacent three first sensing electrodes 210 in each of the first sensing electrode serials 121 The two adjacent first sensing electrodes 210 are connected in series through a resistor, and the three first sensing electrodes 210 in series are grounded through another resistor. Specifically, the first sensing electrode 211 is connected to the flexible circuit board structure 14 through a first connecting wire 131, and the first sensing electrode 211 is connected to the first sensing electrode 212 through a resistor R1. A sensing electrode 212 is connected to the first sensing electrode 213 through a resistor R2, and the first sensing electrode 213 is grounded through a resistor R3. It can be understood that, in the second embodiment of the present invention, the touch device may also be several. For example, two or four first sensing electrodes 210 are grounded in series through a resistor and connected to the flexible circuit board structure through a connecting line. .

Referring to FIG. 6 , the touch device 1 provided by the third embodiment of the present invention is substantially the same as the touch device 1 provided by the first embodiment. The main difference between the touch device 1 provided by the third embodiment and the touch device 1 provided by the first embodiment is that, in the first embodiment, the second of each second sensing electrode serial 121 The sensing electrode 220 passes through The second connection line 132 is connected in series and connected to the flexible circuit board structure 14, and in the third embodiment, each second sensing electrode 220 includes two second sensing electrode portions 220a, 220b, The two connection lines 132 include connection lines 132a, 132b. The second sensing electrode portion 220a and the second sensing electrode portion 220b are alternately distributed. The second sensing electrode portions 220a of each of the second sensing electrode serials 121 are connected in series and connected to the flexible circuit board structure 14 through the connecting lines 132a, and the second sensing electrode portions of each of the second sensing electrode serials 121 220b is connected in series and connected to the flexible circuit board structure 14 via a connecting line 132b. Correspondingly, each of the first sensing electrodes 210 and its adjacent second sensing electrode portions 220a, 220b respectively constitute a sensing group, and the first sensing electrodes 210 and the first in each sensing group The two sensing electrode portions 220a, 220b cooperate with each other to detect the position touched by the user. Similarly, each of the three first sensing electrodes 210 adjacent to each of the first sensing electrode serials 121 is grounded in series and connected to the flexible circuit board structure 14 through the first connecting line 131. It can be understood that, in the third embodiment of the present invention, between two adjacent first sensing electrodes 210 of the adjacent three first sensing electrodes 210 in each of the first sensing electrode serials 121 The three first sensing electrodes 210 connected in series are grounded through a resistor through a series of resistors. It can also be understood that the touch device 1 may also be several. For example, two or four first sensing electrodes 210 are grounded in series through a resistor and connected to the flexible circuit board structure through a connecting line.

Referring to FIG. 7 , the touch device 1 provided by the fourth embodiment of the present invention is substantially the same as the touch device 1 provided by the first embodiment. The main difference between the touch device 1 provided by the fourth embodiment and the touch device 1 provided by the first embodiment is that, in the first embodiment, each of the first sensing electrode serials 121 is The adjacent three first sensing electrodes 210 are connected in series and connected to the flexible circuit board structure 14 through the first connecting line 131. In the fourth embodiment, each of the first sensing electrode serials 121 is All the first sensing electrodes 210 are connected in series, and the three first sensing electrodes 210 are in a group. One of the three first sensing electrodes 210 in each group passes through the first connecting line 131. The flexible circuit board structure 14 is connected. Correspondingly, the touch device 1 further includes an anti-false positive module (not shown). In the present embodiment, the first one of the three first sensing electrodes 210 in each group is connected to the flexible circuit board structure 14 through the first connecting line 131. Specifically, when the first connection line 131 connecting one of the groups sends a driving signal and the voltage of the driving signal is A, the first connection line 131 connecting the other groups does not issue a driving. The signal, that is, the voltage of the first connection line 131 connected to the other group is zero. Therefore, the partial pressure of each of the first sensing electrodes 210 in the group is different, and the partial pressure of each of the first sensing electrodes 210 in the previous group of the group is also different, that is, the first voltage is A The sensing electrode 210 forms a symmetrical voltage distribution at the center, and further forms a symmetrical electric field distribution centering on the first sensing electrode 210 of the voltage A, so that the corresponding second sensing electrode 220 outputs symmetry. The sensing signal, the anti-false positive module further determines the position of the actual touch operation, and further implements touch sensing on the different first sensing electrodes 210.

It can be understood that, in the fourth embodiment of the present invention, the touch device 1 may also be several, such as two or four first sensing electrodes 210 being a group, and a first sense in each group The measuring electrode 210 is connected to the flexible circuit board structure 14 through the first connecting line 131. All of the first sensing electrodes 210 in each of the first sensing electrode serials 121 of the touch device 1 can also be connected in series through a resistor. Each of the second sensing electrodes 220 of the touch device 1 may also include two staggered second sensing electrode portions, each of the second connecting lines 132 includes two connecting lines, and each second sensing electrode The second sensing electrode portions of the string 121 are connected in series and connected to the flexible circuit board structure 14 through one of the connecting wires.

In the above embodiments, in order to improve the sensitivity of the touch panel 10 and not affect the light transmittance of the display region 10a, the sensing electrode structure 12 uses Indium tin oxide (ITO) or indium. A transparent conductive material such as an indium zinc oxide (IZO), the connection line 13 uses a very fine metal trace or indium tin oxide (ITO), indium zinc oxide (Indium zinc) Oxide, IZO) and other transparent conductive materials.

In summary, the creation meets the requirements of the invention patent, and the patent application is filed according to law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments, and those skilled in the art will be equivalently modified or changed according to the spirit of the present invention. It should be covered by the following patent application.

10a‧‧‧ display area

10b‧‧‧Border area

11‧‧‧Substrate

12‧‧‧Sensor electrode structure

13‧‧‧Connected lines

14‧‧‧Soft circuit board structure

121‧‧‧First sensing electrode series

122‧‧‧Second sensing electrode series

131‧‧‧First cable

132‧‧‧second cable

210‧‧‧First sensing electrode

220‧‧‧Second sensing electrode

Claims (10)

A touch panel includes: a substrate; a sensing electrode structure formed on the substrate for detecting a touch position; and a connection line formed on the substrate, including a plurality of first connecting lines and a plurality of a plurality of first and second connecting lines for connecting the sensing electrode structure to transmit a touch sensing signal; the sensing electrode structure includes a plurality of spaced apart first sensing electrodes The serial and second sensing electrode serials, each of the first sensing electrode serials includes a plurality of first sensing electrodes, and each of the second sensing electrode serials includes a plurality of second sensing electrodes, each of the first a sensing electrode and a second sensing electrode adjacent to each other cooperate to detect a touch position, wherein the plurality of first sensing electrodes in each of the first sensing electrode series are divided into multiple groups, The at least two first sensing electrodes of the adjacent group are a group, and each group transmits the touch sensing signals through a first connecting line, and the first sensing electrodes in each group are connected in series and away from the first connection The first sensing electrode farthest from the line is grounded; the first sensing electrode between different groups Mutual disconnection; a plurality of second sensing electrodes of each series of the second series with each other and sensing electrodes transmit the touch sensing signal through a second connection line. The touch panel of claim 1, wherein: the number of the first sensing electrodes connected in series is three. The touch panel of claim 1, wherein: at least two first sensing electrodes adjacent to each of the first sensing electrode serials are connected in series through a resistor, and at least two first sensings are connected in series The electrode is further grounded through another resistor. The touch panel of claim 1, wherein: each of the second sensing electrodes comprises two staggered second sensing electrode portions, each of the second sensing electrode portions being connected in series and through a second connection The line transmits the touch sensing signal. The touch panel of claim 1, wherein the sensing electrode structure is made of indium tin oxide or indium zinc oxide transparent conductive material, and the connecting line is made of metal trace or indium tin oxide. Or indium zinc oxide transparent conductive material. A touch panel includes: a substrate; a sensing electrode structure formed on the substrate for detecting a position touched by a user; and a connecting line formed on the substrate, comprising a plurality of first connecting lines and a plurality of second connecting lines, The plurality of first and second connecting lines are configured to connect the sensing electrode structure to transmit a touch sensing signal; the sensing electrode structure includes a plurality of spaced apart first sensing electrode serials and a second Sensing the electrode series, each of the first sensing electrode series includes a plurality of first sensing electrodes, each of the second sensing electrode series includes a plurality of second sensing electrodes, each of the first sensing electrodes An adjacent one of the second sensing electrodes cooperates to detect the touch position, wherein the plurality of first sensing electrodes in each of the first sensing electrode serials are divided into multiple groups, and at least two adjacent ones The first sensing electrodes are a group, and each group transmits the touch sensing signal through a first connecting line. When one driving voltage of the first connecting line of one group is connected, the first connecting line connected to the other group is not connected. a driving voltage is generated, and a driving voltage is generated from the first connecting line A first voltage sensing electrodes of the two groups symmetrically. The touch panel of claim 6, wherein: the first sensing electrodes of each of the first sensing electrode serials are connected in series, and the three first sensing electrodes are a group, each group The first first sensing electrode transmits the touch sensing signal through the first connecting line. The touch panel of claim 6, wherein: the first sensing electrodes of each of the first sensing electrode series are connected in series by a resistor. The touch panel of claim 6, wherein: each of the second sensing electrodes comprises two staggered second sensing electrode portions, each of the second sensing electrode portions being connected in series and through a second connection The line transmits the touch sensing signal. The touch panel of claim 6, wherein: the sensing electrode structure is made of indium tin oxide or indium zinc oxide transparent conductive material, and the connecting line is made of metal trace or indium tin oxide. Or indium zinc oxide transparent conductive material.