TWI522868B - Touch panel - Google Patents

Description

Touch panel

The present invention relates to a touch panel, and more particularly to a touch panel having a high sensing area ratio.

The touch panel is the most important component in the touch screen, and the touch screen is a convenient input/output device, and is widely used in many portable devices. For a touch screen, the larger the ratio of the area of the sensing area to the area of the entire touch screen, the better.

In addition, the manufacturing process of the touch panel is divided into "single conductive layer" and "double conductive layer". Compared with the double conductive layer touch panel, the single conductive layer touch panel can be relatively low in cost due to the lack of one conductive layer. However, since the single conductive layer touch panel has more bonding pads, the area of the sensing area thereof is thus limited. In addition, multiple transmission terminals of the same type in a single conductive layer touch panel must be bridged through a flexible circuit board. In summary, how to increase the ratio of the area of the sensing area of the touch panel to the area of the entire touch panel is a problem to be overcome.

In view of the above problems, the present invention provides a touch panel, which is configured to reduce the necessity by applying a gap between a frame and a component. The number of bonding pads is configured, and the complexity of the winding is reduced, thereby reducing the width of the frame and increasing the ratio of the area of the sensing area to the area of the entire touch panel.

A touch panel according to one or more embodiments of the present invention includes: a substrate, a conductive layer, a plurality of first transmission ends, a plurality of second transmission ends, a plurality of third transmission ends, and at least one first junction a pad, at least one second bond pad, at least one third bond pad, a first connection line, a first wire, at least one second wire, and at least one third wire. The upper surface of the substrate defines a sensing area and a non-sensing area surrounding the sensing area, and the non-sensing area defines a first side, a second side, a third side and a fourth side, wherein the first side is opposite to the first side The third side is opposite to the fourth side. The conductive layer is on the upper surface of the substrate. The plurality of first transmission ends are located on the conductive layer, corresponding to the sensing area and adjacent to the first side. The plurality of second transmission ends are located on the conductive layer, corresponding to the sensing area and adjacent to the plurality of first transmission ends, and the plurality of first transmission ends are located between the second transmission end and the first side. The plurality of third transmission ends are located on the conductive layer, corresponding to the sensing area and adjacent to the third side. The first bonding pad, the second bonding pad and the third bonding pad are both located on the conductive layer and correspond to the third side. The first connecting line is located on the conductive layer, corresponding to the first side, and is electrically connected to the plurality of first transmitting ends. The first wire is located on the conductive layer and electrically connected between one of the plurality of first transmission ends and the first bonding pad. The second wire is located on the conductive layer and electrically connected between the plurality of second transmission ends and the second bonding pad. The third wire is located on the conductive layer and is electrically connected to The plurality of third transmission ends are between the third bonding pad and the third bonding pad.

In summary, the touch panel disclosed in the present invention can be implemented by a conductive layer, and a part of the transmission end of the touch panel is wound by a gap between the frame of the touch panel and the wire. They are electrically connected to each other. The touch panel has a smaller number of bonding pads, and the number of bonding pads of the touch panel to be connected to the flexible circuit board is reduced, and the area of the bonding portion can be reduced to increase the ratio of the sensing area to the entire touch panel. This can improve the utilization of the touch panel.

The above description of the present invention and the following description of the embodiments of the present invention are intended to illustrate and explain the spirit and principles of the invention.

1000, 1000', 1000", 1000a‧‧‧ touch panels

1100‧‧‧Substrate

1200‧‧‧ Conductive layer

1311, 1321, 1331, 1341, 1351‧‧‧ transmission end

1313, 1323, 1333, 1343, 1353‧‧‧ joint pads

1314, 1324‧‧‧ connection line

1315, 1325, 1335, 1345, 1355‧‧‧ wires

13R1~13R3‧‧‧ receiving line

13R11~13R13‧‧‧ joint pad

13G1‧‧‧ grounding wire

13G2‧‧‧ joint pad

1400‧‧ ‧ Sensing area

1500‧‧‧ non-sensing area

1510, 1520, 1530, 1540‧‧‧ side

1610‧‧‧Discharge protection line

1620‧‧‧Discharge bonding pads

2000‧‧‧Soft circuit board

2101~2105‧‧‧Connecting line

2106A~2106B‧‧‧Connecting line

2107~2108‧‧‧Connection line

3000‧‧‧ processor

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

Fig. 2 is a schematic cross-sectional view corresponding to the line 2-2' of Fig. 1.

FIG. 3 is a top plan view of a touch panel according to an embodiment of the invention.

4 is an enlarged schematic view of a portion of a touch panel in accordance with an embodiment of the present invention.

FIG. 5 is a top plan view of a touch panel according to still another embodiment of the present invention.

FIG. 6 is a top plan view of a touch panel according to still another embodiment of the present invention.

The detailed features of the present invention are described in detail below in the embodiments. And the advantages are sufficient to enable anyone skilled in the art to understand the technical contents of the present invention and to implement the present invention, and the skilled artisan can easily understand the present invention based on the contents disclosed in the specification, the patent application scope and the drawings. Related purposes and advantages. The following examples are intended to describe the present invention in further detail, but are not intended to limit the scope of the invention.

1 and 2 are a top view of a touch panel according to an embodiment of the invention, and FIG. 2 is a top view of the touch panel according to an embodiment of the invention. Fig. 1 is a schematic cross-sectional view of the line 2-2'. As shown in FIG. 1 , the disclosed touch panel 1000 includes a substrate 1100 , a plurality of first transmission ends 1311 , a plurality of second transmission ends 1321 , a plurality of third transmission ends 1331 , and a plurality of fourth transmission ends 1341 . a plurality of fifth transmission terminals 1351, a first bonding pad 1313, a plurality of second bonding pads 1323, a plurality of third bonding pads 1333, a plurality of fourth bonding pads 1343, a plurality of fifth bonding pads 1353, and a first The connecting line 1314, a first wire 1315, a plurality of second wires 1325, a plurality of third wires 1335, a plurality of fourth wires 1345 and a plurality of fifth wires 1355.

The upper surface of the substrate 1100 defines a sensing area 1400 and a non-sensing area 1500 surrounding the sensing area 1400. The non-sensing area 1500 defines a first side 1510, a second side 1520, a third side 1530 and a fourth side. 1540, wherein the first side 1510 is opposite the third side 1530 and the second side 1520 is opposite the fourth side 1540. As can be seen from FIG. 2, the conductive layer 1200 is located on the upper surface of the substrate 1100.

The conductive layer 1200 has a conductive material and an insulating material. The insulating material is used to separate the conductive material, so that the conductive material can be separated into the foregoing plurality of first transmitting ends 1311, second transmitting ends 1321, and third according to position and function. The transmitting end 1331, the first bonding pad 1313, the second bonding pad 1323, the third bonding pad 1333, the fourth bonding pad, the fifth bonding pad, the first connection line 1314, the first wire 1315, the second wire 1325, and the third A wire 1335, a fourth wire 1345, and a fifth wire 1355.

Each of the first transmission ends 1311 corresponds to the sensing area 1400 and is adjacent to the first side 1510. Each second transmission end 1321.

Also corresponding to the sensing area 1400 and adjacent to a first transmitting end 1311, each first transmitting end 1311 is located between a second transmitting end 1321 and the first side 1510. Each of the third transmission ends 1331 corresponds to the sensing area 1400 and is adjacent to the third side 1530. The first bonding pad 1313, the second bonding pad 1323, and the third bonding pad 1333 each correspond to the third side. The first connecting line 1314 corresponds to the first side 1510 and is electrically connected to all the first transmitting ends 1311. In the embodiment, the first wire 1315 is electrically connected between the first transmission end 1311 closest to the second side 1520 and the first bonding pad 1313.

In this embodiment, each of the second wires 1325 is electrically connected between a second transmission end 1321 and a second bonding pad 1323. Each of the third wires 1335 is electrically connected between a third transmission end 1331 and a third bonding pad 1333. Each of the fourth wires 1345 is electrically connected between a fourth transmitting end 1341 and a fourth bonding pad 1343. Each fifth The wire 1355 is electrically connected between a fifth transmission end 1351 and a fifth bonding pad 1353.

Moreover, it can be seen from FIG. 1 that the touch panel 1000 further includes a plurality of receiving lines 13R1 to 13R3, a plurality of grounding lines 13G1, a plurality of receiving bonding pads 13R11, 13R12, 13R13 and a plurality of ground bonding pads 13G2, and a receiving line 13R1. ~13R3 is located in the conductive layer 1200 and corresponds to the sensing region 1400. Each of the ground lines 13G1 is located on the conductive layer 1200 and corresponds to the sensing region 1400. The receiving bond pads 13R11~13R13 are all located on the conductive layer 1200 and correspond to the third side 1530. Each of the ground bond pads 13G2 is located on the conductive layer 1200 and corresponds to the third side 1530. In this embodiment, each of the receiving lines 13R1 to 13R3 is paired with a grounding line 13G1, and the first side (left side) of each receiving line has a first transmitting end 1311 and a second transmitting end 1321. A third transmitting end 1331, a fourth transmitting end 1341 and a fifth transmitting end 1351, and a second side (right side) of each receiving line is a corresponding grounding line 13G1. The second side (right side) of each of the grounding lines 13G1 also has a first transmitting end 1311, a second transmitting end 1321, a third transmitting end 1331, a fourth transmitting end 1341 and a fifth transmitting end 1351. The receiving bonding pads 13R11~13R13 are all located on the conductive layer 1200, corresponding to the third side 1530, and the receiving bonding pad 13R11 is electrically connected to the receiving line 13R1, the receiving bonding pad 13R12 is electrically connected to the receiving line 13R2, and the receiving bonding pad 13R13 is electrically connected. It is connected to the receiving line 13R3. Each of the ground pads 13G2 is also located on the conductive layer 1200 and corresponds to the third side 1530 and is electrically connected to a corresponding one of the ground lines 13G1.

It is also known from FIG. 1 that the touch panel 1000 in one embodiment of the present invention may further include a discharge protection line 1610 and a discharge bonding pad 1620. The discharge protection line 1610 is located on the conductive layer 1200, corresponding to the non-sensing area 1500, and the discharge protection line 1610 surrounds the foregoing first transmission end 1311, second transmission end 1321, third transmission end 1331, first bonding pad 1313, and The second bonding pad 1323, the third bonding pad 1333, the first connection line 1314, the first wire 1315, the second wire 1325, and the third wire 1335. The discharge bond pad 1620 is located on the conductive layer 1200, corresponding to the third side 1530.

In another embodiment of the present invention, the touch panel may have only one second bonding pad 1323 and one second wire 1325. Please refer to FIG. 3 , which is a top view of a touch panel according to an embodiment of the invention. As shown in FIG. 3, the touch panel 1000' has only one second bonding pad 1323 compared to the touch panel 1000 of FIG. 1, but the touch panel 1000' further has a plurality of second connecting lines 1324, each of which The second connecting line is used to connect two second transmitting ends 1321 on both sides of the two adjacent receiving lines and the grounding line (for example, the receiving line 13R1 and the adjacent grounding line 13G1).

Regarding the structure of the second connecting line 1324, please refer to FIG. 3 and FIG. 4 simultaneously, which is an enlarged schematic view of a portion of the touch panel according to an embodiment of the invention. As shown in FIG. 4 , the second connection line 1324 includes a first trace portion 241 , a second trace portion 242 , and a third trace portion 243 located on the conductive layer 1200 . The first wiring portion 241 is located at one of the receiving lines 13R1 to 13R3 (for example, the receiving line 13R1) and the first transmitting end 1311 adjacent to the foregoing receiving line 13R1. The first routing portion 241 is electrically connected to the second transmission end 1321 adjacent to the aforementioned receiving line. The second trace portion 242 is located between a ground line 13G1 and a first transmission end 1311 adjacent to the ground line 13G1, and the second trace portion 242 is electrically connected to a second transmission end adjacent to the ground line 13G1. 1321. The third routing portion 243 corresponds to the first side 1510 , and the third routing portion 243 is electrically connected to the first routing portion 241 and the second routing portion 242 . In this embodiment, the second wire 1325 can be electrically connected to the second bonding pad 1323 and the second transmission end 1321 closest to the second side 1520. However, in some embodiments, the second wire 1325 may be electrically connected between the second bonding pad 1323 and any one of the second transmission ends 1321, which is not limited in the present invention.

In still another embodiment of the present invention, the touch panel may have only one third bonding pad. For the touch panel, reference may be made to FIG. 5 , which is a top view of a touch panel according to still another embodiment of the present invention. As shown in FIG. 5, there is only one third bonding pad 1333 in the touch panel 1000", and the first bonding pad 1313, the second bonding pad 1323 and the third bonding pad 1333 are adjacent to each other. Meanwhile, the third bonding pad 1333 The plurality of third wires 1335 are electrically connected to the plurality of third transmission ends 1331.

In conjunction with the above embodiments, in one embodiment of the present invention, the touch panel can be electrically connected to the processor through a flexible circuit board. Please refer to FIG. 6 , which is a top view of a touch panel according to still another embodiment of the present invention. As shown in FIG. 6, the touch panel 1000a may further include a flexible circuit board 2000 compared to the aforementioned touch panel 1000". The flexible circuit board 2000 includes a flexible base. The board 2100 has a plurality of connecting lines 2101 to 2105 and connecting lines 2106A, 2106B, and 2106C, a connecting line 2107, and a connecting line 2108. The first end of the connecting wire 2101 is electrically connected to the first bonding pad 1313. The first end of the connecting wire 2102 is electrically connected to the second bonding pad 1323. The first end of the connecting wire 2103 is electrically connected to the third bonding pad 1333. The first end of the connecting line 2104 is electrically connected to the fourth bonding pad 1343. The first end of the connecting line 2105 is electrically connected to the fifth bonding pad 1353. The first ends of the connecting lines 2106A~2106C are electrically connected to the receiving end respectively. One of the bonding pads 13R11~13R13, the first end of the connecting wire 2107 is electrically connected to the ground bonding pad 13G2, and the first end of the connecting wire 2108 is electrically connected to the discharge bonding pad 1620. The second ends of the connecting lines may be electrically connected to the processor 3000, and the second end of the connecting lines 2108 may not be connected to the processor 3000, but may be connected to the electrostatic protection circuit of the entire system. Therefore, the processor 3000 can control the plurality of transmission ends and the receiving lines on the touch panel 1000a through the flexible circuit board 2000 to detect the touch gesture.

In this embodiment, it can be seen that the first transmission end, the second transmission end, and/or the third transmission end are respectively electrically connected to the first bonding pad, the second bonding pad, and/or on the touch panel 1000a. Or the third bonding pad, so there is no need to bridge (jump) the first transmission end, the second transmission end and the third transmission end on the flexible circuit board 2000. In this way, the manufacturing process of the flexible circuit board can be simplified, and the touch panel disclosed in the present invention can be used to substantially improve the yield of the corresponding flexible circuit board or the entire touch screen.

In summary, the touch panel disclosed in the present invention can The surface of the touch panel is electrically connected to each other by a gap between the frame and the wire of the touch panel. The touch panel has a smaller number of bonding pads, and the number of bonding pads of the touch panel to be connected to the flexible circuit board is reduced, and the area of the bonding portion can be reduced to increase the ratio of the sensing area to the entire touch panel. It is also possible to reduce the number of traces that a flexible circuit board has to bridge. On the one hand, the utilization rate of the touch panel can be improved, and on the other hand, the yield of the touch screen produced by connecting the touch panel to the flexible circuit board can be improved.

Although the present invention has been disclosed above in the foregoing embodiments, it is not intended to limit the invention. It is within the scope of the invention to be modified and modified without departing from the spirit and scope of the invention. Please refer to the attached patent application for the scope of protection defined by the present invention.

1000‧‧‧Touch panel

1311, 1321, 1331, 1341, 1351‧‧‧ transmission end

1313, 1323, 1333, 1343, 1353‧‧‧ joint pads

1314‧‧‧Connecting line

1315, 1325, 1335, 1345, 1355‧‧‧ wires

13R1~13R3‧‧‧ receiving line

13R11~13R13‧‧‧ joint pad

13G1‧‧‧ grounding wire

13G2‧‧‧ joint pad

1400‧‧ ‧ Sensing area

1500‧‧‧ non-sensing area

1510, 1520, 1530, 1540‧‧‧ side

1610‧‧‧discharge line

1620‧‧‧Join pad

Claims (8)

A touch panel includes: a substrate defining a sensing area and a non-sensing area surrounding the sensing area on the upper surface of the substrate, the non-sensing area defining a first side, a second side, and a third a side edge and a fourth side, wherein the first side is opposite to the third side, the second side is opposite to the fourth side; a conductive layer is located on the upper surface of the substrate; a transmission end, located in the conductive layer, corresponding to the sensing area and adjacent to the first side; a plurality of second transmission ends located in the conductive layer, corresponding to the sensing area and adjacent to the first transmission The first transmission end is located between the second transmission end and the first side; the plurality of third transmission ends are located on the conductive layer, corresponding to the sensing area and adjacent to the third side At least one first bonding pad is located on the conductive layer corresponding to the third side; at least one second bonding pad is located on the conductive layer corresponding to the third side; at least one third bonding pad is located at the a conductive layer corresponding to the third side; a first connecting line, located in the conductive layer, To the first side, and connected to the plurality of first terminals electrically; a first conductive layer is electrically connected between the one of the first transmitting ends and the first bonding pad; at least one second wire is disposed on the conductive layer and electrically connected to the first conductive layer Between the second transmission end and the at least one second bonding pad; at least one third wire is located in the conductive layer, electrically connected between the third transmission end and the at least one third bonding pad; a receiving line, Located in the conductive layer and corresponding to the sensing area; a grounding line located at the conductive layer and corresponding to the sensing area; and a second connecting line for electrically connecting between the second transmitting ends, the first The second connection line includes: a first trace portion located between the receiving line and a first transmission end of the first transmission end adjacent to the receiving line, electrically connected to the a second transmission end of the second transmission end adjacent to the receiving line; a second routing portion located at the conductive layer and located adjacent to the ground line between the ground line and the first transmission ends Between a first transmission end and an electrical connection to the second transmission end adjacent to the a second transmission end of the ground line; and a third line portion located on the conductive layer and corresponding to the first side, electrically connecting the first wire portion and the second wire portion; wherein The receiving line is paired with the grounding line, and a first side of the receiving line has one of the first transmitting ends, and the second transmitting ends are And one of the third transmission ends, the receiving line is opposite to the ground line corresponding to a second side of the first side, and the second side of the ground line has the first transmitting ends 1. One of the second transmission ends and one of the third transmission terminals. The touch panel of claim 1, further comprising: a receiving bonding pad located on the conductive layer, corresponding to the third side, electrically connected to the receiving line; and a ground bonding pad located at The conductive layer is electrically connected to the ground line corresponding to the third side. The touch panel of claim 1, further comprising: a discharge protection line, located in the conductive layer, corresponding to the non-sensing area, and surrounding the first transmission ends, the second transmission ends, the a third transmission end, the first bonding pad, the at least one second bonding pad, the at least one third bonding pad, the first connecting line, the first wire, the at least one second wire and the at least one a three wire; and a discharge bond pad located on the conductive layer corresponding to the third side. The touch panel of claim 1, wherein the at least one second bonding pad is a second bonding pad, the at least one second wire is a second wire, and the second wire is electrically connected to the The second bonding pad and one of the second transmission ends. The touch panel of claim 1, wherein the at least one third bonding pad is a third bonding pad, and the at least one third wire is a plurality of wires And a third wire, each of the third wires is electrically connected to one of the third bonding pad and the third transmitting ends. The touch panel of any one of claims 1 to 5, further comprising a flexible circuit board electrically connected to the first bonding pad, the at least one second bonding pad and the at least one The third bonding pad. The touch panel of claim 6, wherein the flexible circuit board comprises: a flexible substrate; a first connecting line located on the flexible substrate, having a first end and a second end The first end of the first connecting line is electrically connected to the first bonding pad; a second connecting line is located on the flexible substrate, having a first end and a second end, the two connecting lines The first end is electrically connected to the second bonding pad; and a third connecting line is located on the flexible substrate, having a first end and a second end, the first end of the third connecting line The third bonding pad is electrically connected. The touch panel of claim 6, further comprising a processor electrically connected to the second end of the first connecting line, the second end of the second connecting line, and the The second end of the third connection line.