TW201405754A - Compound induction electrode structure applied to a touch panel - Google Patents

Abstract

A compound induction electrode structure applied to a touch panel is disclosed. The compound induction electrode structure includes a firs conducive unit and a second conductive unit. The first conductive unit includes a plurality of first stripped conductive layers disposed a transparent substrate. The second conductive unit includes a plurality of second stripped conductive layers disposed on the transparent substrate and respectively covering the first stripped conductive layers, where conductive material used by the first stripped layer and conductive material used by the second stripped layer are different. Hence, the manufacturing cost and the conductibility of the compound induction electrode structure can be increased effectively.

Description

Composite sensing electrode structure for touch panel

The invention relates to a sensing electrode structure, in particular to a composite sensing electrode structure for a touch panel.

With the rise of information appliance products, touch panels have gradually replaced the old way of communicating with keyboards, mice and information products. Touch panel technology provides a user-friendly interface for ordinary users to operate computers. Or electronic products, can become more direct, simpler, more vivid and more interesting. Touch panels are used in a wide range of applications, including portable communication and information products (such as personal digital assistant PDAs), financial/commercial systems, medical registration systems, surveillance systems, information navigation systems, and ancillary teaching systems. And so on, because of its simple operation, it can greatly increase the convenience of consumers in use.

In general, the touch panel can be roughly classified into a resistive type, a capacitive type, a piezoelectric type, an infrared type, and an ultrasonic type according to the sensing principle. The capacitive touch panel is provided with an indium tin oxide (ITO) conductive layer on the surface of the glass as a sensing electrode, and then a metal wire around the glass transmits a signal to an integrated circuit on an external soft board or a hard board. It is called a touch sensor. If the external circuit board and the uppermost protective cover are further attached, the finished product is called a touch panel. When used, the surface of the glass will form a uniform electric field. When the user touches the surface of the glass with the fingertip, the capacitance between the finger and the electric field will change due to the electrostatic reaction. According to this change, the coordinates of the input point of the fingertip can be located.

However, the sensing electrodes of conventional touch panels are usually patterned using an expensive yellow light process, and the conductivity of indium tin oxide is not as good as that of ordinary gold. It is a material, so the traditional touch panel has high cost and poor conductivity, which is not conducive to the development of large-size touch panels. Therefore, how to reduce the manufacturing cost and effectively improve the conductivity by improving the structural design has become an important issue that the business person wants to solve.

The embodiment of the invention provides a composite sensing electrode structure for a touch panel, which can effectively reduce manufacturing cost and effectively improve conductivity.

A composite sensing electrode structure for a touch panel according to an embodiment of the present invention, wherein the touch panel has at least one transparent substrate, and the composite sensing electrode structure includes: a first conductive unit and a second conductive unit. The first conductive unit includes a plurality of first strip-shaped conductive layers disposed on the transparent substrate and separated from each other by a predetermined distance. The second conductive unit includes a plurality of second strip-shaped conductive layers disposed on the transparent substrate and respectively covering the plurality of first strip-shaped conductive layers, wherein the first strip-shaped conductive layer uses conductive The material is different from the conductive material used for the second strip of conductive layer.

Preferably, the conductive material used in each of the first strip-shaped conductive layers is a conductive polymer, and the conductive material used in each of the second strip-shaped conductive layers is a metal.

Preferably, the conductive polymer is polyaniline (PANI), polyphenylene sulfide (PPS), polypyrrole (PPY), poly(p-phenylene), PPP. , polythiophene (PT), poly(p-phenylene vinylene, PPV), polyfluorene (PF) and polyacetylene (PA).

Preferably, the metal is one of copper, platinum, aluminum, platinum, gold and silver.

Preferably, the conductive material used in each of the first strip-shaped conductive layers is one of palladium (Pd) and tin (Sn), and each of the second strip-shaped conductive layers is used. The conductive material is one of copper, platinum, aluminum, platinum, gold, and silver.

Preferably, each of the first strip-shaped conductive layers is formed on the transparent substrate by imprinting, and each of the second strip-shaped conductive layers is passed through an electroless plating method to cover corresponding ones. On the first strip of conductive layer.

The invention has the effect that the composite sensing electrode structure of the invention is formed by a low temperature process, instead of the yellow light process used in the conventional method, so the invention can effectively save labor cost and avoid waste of raw materials, so the production cost It is obviously superior to the prior art. Furthermore, the composite sensing electrode structure of the present invention is composed of a first strip-shaped conductive layer and a second strip-shaped conductive layer, and its conductivity is obviously superior to that of an indium tin oxide (ITO) sensing electrode used in a conventional touch panel. In summary, the present invention has the advantages of effectively reducing the manufacturing cost of the composite sensing electrode structure and effectively improving the conductivity of the composite sensing electrode structure.

For a better understanding of the features and technical aspects of the present invention, reference should be made to the accompanying drawings.

[First Embodiment]

FIG. 1 is a perspective view of a three-dimensional combination of a touch panel using a composite sensing electrode structure according to a first embodiment of the present invention. Since the present invention is mainly a touch panel The improvement of the structure of the sensing electrode is such that the other components of the touch panel are omitted in FIG. 1 and will not be described again. 2 is a partial cross-sectional view of the A-A cut line after removing the transparent upper cover of FIG. 1, and FIG. 3 is a partial cross-sectional view of the B-B cut line after the transparent upper cover is removed. As shown in the above figure, the first embodiment of the present invention provides a touch panel Z, wherein the touch panel Z has at least a composite sensing electrode structure 1, a transparent substrate 2, and a transparent upper cover 3, and the composite sensing electrode structure 1 includes: A first conductive unit 11 and a second conductive unit 12.

The first conductive unit 11 includes a plurality of first strip-shaped conductive layers 110 disposed on the transparent substrate 2 and separated from each other by a predetermined distance. The second conductive unit 12 includes a plurality of second strip-shaped conductive layers 120 disposed on the transparent substrate 2 and covering the plurality of first strip-shaped conductive layers 110 respectively, and the conductive material used in the first strip-shaped conductive layer 110 The conductive materials used in the two strip-shaped conductive layers 120 are different. Preferably, the conductive material used in each of the first strip-shaped conductive layers 110 may be a conductive polymer, and the conductive material used in each of the second strip-shaped conductive layers 120 may be a metal. Another preferred material selection may be that palladium (Pd) or tin (Sn) may be used for the conductive material used in each of the first strip-shaped conductive layers 110.

Furthermore, as shown in FIG. 1, the composite sensing electrode structure 1 can form a plurality of X-axis sensing lines (X) and a plurality of Y-axis sensing lines (Y), wherein each of the X-axis sensing lines ( X) and each of the Y-axis sensing lines (Y) may be respectively disposed on the upper surface 201 and the lower surface 202 of the transparent substrate 2, and each of the X-axis sensing lines (X) and each of the Y-axis sensing lines ( Y) can be extended along the x-axis and the y-axis, respectively. In addition, the touch panel Z includes a transparent upper cover 3 disposed on the transparent substrate 2 for covering a plurality of X-axis sensing lines (X), wherein the transparent upper cover 3 can be a glass base. The plate or a surface is coated with a hardened coated plastic substrate, and the transparent upper cover 3 has a touch surface 30 that is provided to the user's finger F for contact. Therefore, when the user slides or clicks on the touch surface 30 through the finger F, the X-axis sensing line (X) and the Y-axis sensing line (Y) of the composite sensing electrode structure 1 are simultaneously induced. For the corresponding signal transmission and control.

The conductive material used for the transparent substrate 2, the first strip-shaped conductive layer 110, and the second strip-shaped conductive layer 120. For example, according to different design requirements, the transparent substrate 2 can be glass, polyethylene terephthalate, polycarbonate, polyethylene, polyvinyl chloride, polypropylene, polystyrene, and polymethyl methacrylate. One of them. In addition, according to different design requirements, the conductive polymer may be polyaniline (PANI), polyphenylene sulfide (PPS), polypyrrole (PPY), poly(p-phenylene). , PPP), polythiophene (PT), poly(p-phenylene vinylene, PPV), polyfluorene (PF), and polyacetylene (PA). In addition, the metal may be one of copper, platinum, aluminum, platinum, gold, and silver depending on various design requirements. However, the conductive materials used in the above-mentioned transparent substrate 2, the first strip-shaped conductive layer 110 and the second strip-shaped conductive layer 120 are merely examples, and are not intended to limit the present invention.

Furthermore, the present invention provides a method for fabricating a composite sensing electrode structure 1 for a touch panel Z, which may include the following steps: first, by imprinting, a plurality of first electrodes disposed on the transparent substrate 2 are formed. a strip-shaped conductive layer 110; then, through electroless plating, to form a plurality of second strip-shaped conductive layers 120 respectively covering the plurality of first strip-shaped conductive layers 110, wherein Electroless plating is a low temperature process. However, the above-described methods for forming the first strip-shaped conductive layer 110 and the second strip-shaped conductive layer 120 are for illustrative purposes only and are not intended to limit the invention. Therefore, the present invention can effectively reduce the manufacturing of the composite sensing electrode structure 1 when the composite sensing electrode structure 1 is manufactured, since the yellow light manufacturing process used in the conventional electrode manufacturing is not required. manufacturing cost.

[Second embodiment]

4 is a perspective exploded view of a touch panel using a composite sensing electrode structure according to a second embodiment of the present invention. As can be seen from the above figures, the second embodiment of the present invention provides another touch panel Z, and the second embodiment has the greatest difference from the first embodiment in that the second embodiment uses an upper transparent substrate 2A and a lower transparent substrate. 2B to replace the transparent substrate 2 of the first embodiment, wherein the X-axis sensing line (X) of the composite sensing electrode structure 1 can be previously disposed on the upper surface 201A of the upper transparent substrate 2A, and the composite sensing electrode structure 1 The Y-axis sensing line (Y) may be preliminarily disposed on the upper surface 201B of the lower transparent substrate 2B, and finally the upper transparent substrate 2A and the lower transparent substrate 2B are both transmitted through optical glue (not shown) to be closely coupled to each other. .

It is worth mentioning that the X-axis sensing line (X) of the composite sensing electrode structure 1 can also be replaced by the lower surface 202A of the upper transparent substrate 2A, and the Y-axis sensing of the composite sensing electrode structure 1 The line (Y) may be replaced with a lower surface 202B previously provided on the lower transparent substrate 2B. In other words, according to different design requirements, the X-axis sensing line (X) of the composite sensing electrode structure 1 can be selectively disposed in advance on the upper surface 201A or the lower surface 202A of the upper transparent substrate 2A, and composite The Y-axis sensing line (Y) of the sensing electrode structure 1 can be selectively disposed in advance on the upper surface 201B or the lower surface 202B of the lower transparent substrate 2B.

[Possible effects of the examples]

The invention has the effect that the composite sensing electrode structure of the invention is formed by a low temperature process, instead of the yellow light process used in the conventional method, so the invention can effectively save labor cost and avoid waste of raw materials, so the production cost It is obviously superior to the prior art. Furthermore, the composite sensing electrode structure of the present invention is composed of a first strip-shaped conductive layer 110 and a second strip-shaped conductive layer 120, and the conductivity thereof is obviously superior to the indium tin oxide (ITO) sensing used in the conventional touch panel. electrode. In summary, the present invention has the advantages of effectively reducing the manufacturing cost of the composite sensing electrode structure 1 and effectively improving the conductivity of the composite sensing electrode structure 1.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalents of the invention are included in the scope of the invention.

Z‧‧‧ touch panel

1‧‧‧Composite sensing electrode structure

11‧‧‧First Conductive Unit

110‧‧‧First strip of conductive layer

12‧‧‧Second conductive unit

120‧‧‧Second strip of conductive layer

X‧‧‧X axial sensing line

Y‧‧‧Y axial sensing line

2‧‧‧Transparent substrate

201‧‧‧ upper surface

202‧‧‧lower surface

2A‧‧‧Upper transparent substrate

201A‧‧‧Upper surface

202A‧‧‧ lower surface

2B‧‧‧lower transparent substrate

201B‧‧‧Upper surface

202B‧‧‧ lower surface

3‧‧‧Transparent cover

30‧‧‧Touch surface

F‧‧‧ finger

FIG. 1 is a perspective view of a three-dimensional combination of a touch panel using a composite sensing electrode structure according to a first embodiment of the present invention.

2 is a partial cross-sectional view of the A-A cut line of FIG. 1 with the transparent upper cover removed.

3 is a partial cross-sectional view of the B-B cut surface line of FIG. 1 with the transparent upper cover removed.

4 is a perspective exploded view of a touch panel using a composite sensing electrode structure according to a second embodiment of the present invention.

1‧‧‧Composite sensing electrode structure

11‧‧‧First Conductive Unit

110‧‧‧First strip of conductive layer

12‧‧‧Second conductive unit

120‧‧‧Second strip of conductive layer

2‧‧‧Transparent substrate

201‧‧‧ upper surface

202‧‧‧lower surface

Claims (6)

A composite sensing electrode structure for a touch panel, wherein the touch panel has at least one transparent substrate, and the composite sensing electrode structure includes: a first conductive unit including a plurality of transparent electrodes a first strip-shaped conductive layer on the substrate and separated from each other by a predetermined distance; and a second conductive unit including a plurality of second electrodes disposed on the transparent substrate and covering the plurality of first strip-shaped conductive layers respectively The strip-shaped conductive layer, wherein the conductive material used in the first strip-shaped conductive layer is different from the conductive material used in the second strip-shaped conductive layer. The composite sensing electrode structure for a touch panel according to claim 1, wherein the conductive material used in each of the first strip-shaped conductive layers is a conductive polymer, and each of the The conductive material used for the second strip-shaped conductive layer is a metal. The composite induction electrode structure for a touch panel according to claim 2, wherein the conductive polymer is polyaniline (PANI), polyphenylene sulfide (PPS), polypyrrole. (polypyrrole, PPY), poly(p-phenylene), PPP, polythiophene (PT), poly(p-phenylene vinylene, PPV), polyfluorene (PF) And one of polyacetylene (PA). The composite induction electrode structure for a touch panel according to claim 2, wherein the metal is one of copper, platinum, aluminum, platinum, gold, and silver. The composite sensing electrode structure for a touch panel according to claim 1, wherein each of the first strip-shaped conductive layers is used The conductive material is one of palladium (Pd) and tin (Sn), and the conductive material used for each of the second strip-shaped conductive layers is copper, platinum, aluminum, platinum, gold, and silver. One of them. The composite sensing electrode structure for a touch panel according to claim 1, wherein each of the first strip-shaped conductive layers is formed by imprinting on the transparent substrate, and each The second strip-shaped conductive layer is passed through an electroless plating method to cover the corresponding first strip-shaped conductive layer.