TWI506512B - Structure of touch panel - Google Patents

Description

Touch panel structure

The invention has the structure of a touch panel, which not only has the advantages of thinness of the surface capacitive touch panel, but also has the durability of the projected capacitive touch panel, the drift phenomenon is smaller than the surface capacitance, and the multi-touch technology is supported. advantage.

The material of the transparent electrode of the large-size touch panel is mainly a transparent conductive material, for example, ITO or AZO, but the resistivity of a transparent conductive material such as ITO or AZO tends to increase as the size increases, and the resistance An increase in the rate causes an RC-delay effect. That is, because the resistance increases, the product of the resistance (R) and the capacitance (C) becomes large, so that the transmission of the electric signal becomes slow. Conventional large-sized touch panels often use glass as a substrate, and a transparent conductive material is formed on the glass, and then a high-temperature process is performed to recrystallize the transparent conductive material to increase conductivity. However, since the transparent conductive material itself has its physical limit of electrical conductivity, the use of a high temperature process results in a limited increase in conductivity. The cutting and forming of the glass substrate is not easy, and the cost is very expensive, and the problem of low yield and increased cost will be encountered in mass production.

It is an object of the present invention to provide a touch panel structure for improving the shortcomings of electrical signal delay caused by RC-delay.

In order to achieve the above object, the structure of the touch panel of the present invention comprises: a transparent substrate; a plurality of sensing series disposed on the transparent substrate, each sensing series continuously extending in one direction; and a plurality of conductive Auxiliary lines are superimposed on the surface of the complex sensing series.

In order to achieve the above objective, the touch panel of the present invention has a structure in which each sensing series includes a plurality of sensing pads and a plurality of connecting lines, the plurality of sensing pads are arranged in an array, and the plurality of connecting wires are electrically connected in one direction. Complex sensing pads.

In order to achieve the above object, the touch panel of the present invention has a structure in which a plurality of conductive auxiliary lines are stacked on the surface of the plurality of connecting lines.

To achieve the above object, the touch panel of the present invention has a structure in which a plurality of conductive auxiliary lines are stacked on the surface of the plurality of connection lines and the plurality of sensing pads.

To achieve the above object, the touch panel of the present invention has a structure in which a line width of the conductive auxiliary line is between 1 μm and 50 μm .

In order to achieve the above object, the structure of the touch panel of the present invention, wherein the material of the plurality of sensing series can be indium tin oxide, indium oxide, zinc oxide, indium zinc oxide, zinc oxide doped with aluminum, doping Tin oxide or a mixture of the above.

In order to achieve the above object, the structure of the touch panel of the present invention, wherein the material of the plurality of conductive auxiliary lines may be a conductive metal.

In order to achieve the above object, the structure of the touch panel of the present invention further includes an anti-reflection layer disposed on the plurality of conductive auxiliary lines.

In order to achieve the above object, the structure of the touch panel of the present invention, wherein the anti-reflection layer is made of a dark conductive material.

In order to achieve the above object, the structure of the touch panel of the present invention, wherein the anti-reflection layer is made of an insulating material.

Please refer to FIG. 1a and FIG. 1b for a touch panel structure according to an embodiment of the invention. The touch panel structure comprises: a transparent substrate 100. The transparent substrate 100 can be made of a flexible material and can be curled into a roll shape, for example, PEN, PET, PES, flexible glass, PMMA, PC or PI. One of them may also be a multi-layer composite material of the above materials, and a substrate having a plurality of transparent stacked structures may be formed on the above material, and the transparent stack structure of the plurality of layers may be, for example, an anti-reflection layer. Alternatively, the transparent substrate 100 can be glass or tempered glass. The plurality of sensing series 110 and 120 are disposed on the transparent substrate 100. Each of the sensing series 110 and 120 extends continuously in a direction D1 and D2, respectively, and the plurality of sensing series 110 and 120 are interdigitated to form a projected capacitance. Touch panel. The plurality of sensing substrates 110 and 120 may be disposed on opposite sides of the transparent substrate 100, or disposed on the same side, or separately disposed on the two transparent substrates 100, and then the two transparent substrates 100 are pasted. The materials of the complex sensing series 110 and 120 are transparent conductive materials, such as indium tin oxide, indium oxide, zinc oxide, indium zinc oxide, zinc oxide doped with aluminum, tin oxide doped with antimony or mixture. And a plurality of conductive auxiliary lines 130 stacked on the surface of the plurality of sensing series 110 and 120, the plurality of conductive auxiliary lines 130 extending in the direction D1 on the surface of the complex sensing series 110, and the plurality of conductive auxiliary lines 130 in the plurality of sensing strings The surface of column 120 extends in direction D2 and may have a line width of between 1 μm and 50 μm , although the line width can be varied for different designs. The plurality of conductive auxiliary wires 130 may be made of a conductive metal such as gold, silver, aluminum, copper, molybdenum, or a conductive alloy such as a copper alloy or an aluminum alloy. The plurality of conductive auxiliary wires 130 may also be composed of the above metal multilayer laminate, such as molybdenum/ Aluminum/molybdenum laminate. The plurality of conductive auxiliary lines 130 can improve the conductivity of the complex sensing series 110 and reduce the delay of the electrical signals. The plurality of conductive auxiliary lines 130 further have an anti-reflection layer thereon for reducing reflection of the plurality of conductive auxiliary lines 130. The anti-reflection layer may be made of a dark conductive material such as ITO, TiN, TiAlCN, TiAlN, NbO, NbN. , Nb ₂ O _x , TiC, SiC or WC. It may also be an insulating material, and may be, for example, CuO, CoO, WO ₃ , MoO ₃ , CrO, CrON, Nb ₂ O ₅ . The above structure can be used as a projected capacitive or surface capacitive touch panel.

Please refer to FIGS. 2a and 2b for a touch panel structure according to an embodiment of the present invention. The touch panel structure comprises: a transparent substrate 200. The transparent substrate 200 can be made of a flexible material and can be curled into a roll shape, for example, PEN, PET, PES, flexible glass, PMMA, PC or PI. One of them may also be a multi-layer composite material of the above materials, and a substrate having a plurality of transparent stacked structures may be formed on the above material, and the transparent stack structure of the plurality of layers may be, for example, an anti-reflection layer. Alternatively, the transparent substrate 200 can be glass or tempered glass. The plurality of sensing series 210 and 220 are disposed on the transparent substrate 200. Each of the sensing series 210 and 220 extends continuously in a direction D1 and D2, respectively, and the plurality of sensing series 210 and 220 are interdigitated to form a projected capacitance. Touch panel. The complex sensing series 210 includes a plurality of sensing pads 211 and a plurality of connecting lines 212. The complex sensing series 220 includes a plurality of sensing pads 221 and a plurality of connecting lines 222. The plurality of sensing pads 211 and 221 are arranged in an array and interlaced with each other. The plurality of connection lines 212 and 222 are electrically connected to the plurality of sensing pads 211 and 221 in directions D1 and D2, respectively. The shape of the plurality of sensing pads 211 and 221 may be hexagonal, strip, triangular, diamond, snowflake, etc., and the specific shape and size may be selected according to the control IC. The plurality of sensing substrates 210 and 220 may be disposed on opposite sides of the transparent substrate 200, or disposed on the same side, or separately disposed on the two transparent substrates 200, and then the two transparent substrates 200 are pasted. The materials of the complex sensing series 210 and 220 are transparent conductive materials, for example, indium tin oxide, indium oxide, zinc oxide, indium zinc oxide, zinc oxide doped with aluminum, tin oxide doped with antimony or the above a mixture. And a plurality of conductive auxiliary lines 230 stacked on the surface of the plurality of sensing pads 211 and the plurality of connecting lines 212, and stacked on the surface of the plurality of sensing pads 221 and the plurality of connecting lines 222, and having a line width of 1 μm to 50 Between μ m, the line width can be changed with different designs. Or as shown in FIGS. 2c and 2d, the plurality of conductive auxiliary lines 230 are stacked on the surface of the plurality of connecting lines 212 and the plurality of connecting lines 222, and the line width thereof may be between 1 μm and 50 μm . Change the line width for different designs. (not shown) or a plurality of conductive auxiliary lines 230 may be stacked on the surface of the plurality of connection lines 212 and the plurality of connection lines 222 and respectively bridge the partial plurality of sensing pads 211 and the plurality of sensing pads 221. The plurality of conductive auxiliary wires 230 may be made of a conductive metal such as gold, silver, aluminum, copper, molybdenum, or a conductive alloy such as a copper alloy or an aluminum alloy. The plurality of conductive auxiliary wires 230 may also be formed of the above metal multilayer laminate, such as molybdenum/ Aluminum/molybdenum laminate. The plurality of conductive auxiliary lines 230 can improve the conductivity of the complex sensing series 210 and reduce the delay of the electrical signals. The plurality of conductive auxiliary wires 230 further have an anti-reflection layer thereon for reducing light reflection of the plurality of conductive auxiliary wires 230, wherein the anti-reflection layer is made of a dark conductive material such as ITO, TiN, TiAlCN, TiAlN, NbO, NbN, Nb ₂ O _x , TiC, SiC or WC. It may also be an insulating material, and may be, for example, CuO, CoO, WO ₃ , MoO ₃ , CrO, CrON, Nb ₂ O ₅ . The above structure can be used as a projected capacitive or surface capacitive touch panel.

Although the present invention has been disclosed above by way of example, it is not intended to limit the invention. The scope of the present invention is defined by the scope of the claims, and the scope of the invention is intended to be limited by the scope of the invention.

D1, D2‧‧‧ direction

100,200‧‧‧ Transparent substrate

110, 120, 210, 220‧‧‧ plural sense series

211, 221‧‧‧Multiple sensing pads

212, 222‧‧‧multiple connecting lines

130, 230‧‧‧Multiple conductive auxiliary lines

1a and 1b are top views of a touch panel according to an embodiment of the present invention;

2a to 2d are top views of a touch panel according to an embodiment of the present invention;

D1, D2‧‧‧ direction

200‧‧‧ Transparent substrate

210‧‧‧Multiple sensing series

211‧‧‧Multiple sensing pads

212‧‧‧Multiple cables

230‧‧‧Multiple conductive auxiliary lines

Claims (4)

A touch panel structure includes: a transparent substrate; a plurality of sensing series disposed on the transparent substrate, each sensing series continuously extending in one direction, and each sensing series includes a plurality of senses a test pad and a plurality of connecting wires, the sensing pads are arranged in an array, the connecting wires are electrically connected to the sensing pads in the direction; a plurality of conductive auxiliary wires are continuously extended and stacked on the connecting wires and the The surface of the sensing pad is formed by a metal multilayer laminate; and an anti-reflective layer is disposed on the conductive auxiliary wires, and the anti-reflective layer is made of a dark conductive material. The structure of the touch panel of claim 1, wherein the conductive auxiliary line has a line width of between 1 μm and 50 μm. The structure of the touch panel of claim 1, wherein the sensing series may be made of indium tin oxide, indium oxide, zinc oxide, indium zinc oxide, aluminum-doped zinc oxide, or doped germanium. Tin oxide or a mixture of the above. For example, the structure of the touch panel of claim 1 wherein the materials of the conductive auxiliary lines are also It can be a conductive metal, and the conductive metal is a conductive alloy of gold, silver, aluminum, copper, molybdenum, or a copper alloy or an aluminum alloy.