TWM500302U - Touch panel and touch display device - Google Patents

Abstract

A touch panel including a substrate, an index-matched layer, and a patterned electrode layer is provided. The index-matched layer is disposed on the substrate. The patterned electrode layer is disposed on the index-matched layer, wherein the index-matched layer is located between the substrate and the patterned electrode layer. A touch display device is also provided.

Description

Touch panel and touch display device

The present invention relates to a panel and a display device, and more particularly to a touch panel and a touch display device.

For the convenience, volume, and humanization, many electronic products have been converted from traditional keyboards and mice to touch panels as input interfaces. In the current general touch panel design, it can be roughly classified into a resistive type, a capacitive type, an optical type, an acoustic wave type, and an electromagnetic type according to the design principle of the touch sensing, wherein the resistive type and the capacitive type are mainstream. In the current situation, since the capacitive touch panel has multi-touch characteristics and can be operated humanized, it is gradually favored by the market.

In detail, the capacitive touch panel has a touch area and a peripheral line area surrounding the touch area, wherein the touch area is provided with a patterned electrode layer, and the patterned electrode layer is composed of a plurality of electrode series . When the user does not touch the capacitive touch panel, there is an initial capacitance value between the electrode strings. When the user touches the touch panel, the capacitance value between the series of electrodes changes, so it can be determined by The position where the capacitance value changes is used to determine the position at which the user touches the capacitive touch panel. However, when the ambient light is irradiated onto the capacitive touch panel, the ambient light is reflected by the contact with the patterned electrode layer and is perceived by the user, thereby affecting the touch display device using the capacitive touch panel. Display quality and effect.

The present invention provides a touch panel that helps reduce the probability of a user-perceived patterned electrode layer of the touch panel.

The novel creation provides a touch display device with good display quality.

The novel creation proposes a touch panel comprising a substrate and an index matching layer to pattern the electrode layer. The index matching layer is disposed on the substrate. The patterned electrode layer is disposed on the index matching layer, wherein the index matching layer is between the substrate and the patterned electrode layer.

The present invention proposes a touch display device including a display panel and a touch panel. The display panel includes a pixel array substrate, a liquid crystal layer, and a color filter layer. The liquid crystal layer is disposed on the pixel array substrate. The color filter layer is disposed on the liquid crystal layer, wherein the liquid crystal layer is located between the color filter layer and the pixel array substrate. The touch panel is disposed on the display panel. The touch panel includes an index matching layer and a patterned electrode layer. The index matching layer is disposed on the color filter layer. The patterned electrode layer is disposed on the index matching layer, wherein the index matching layer is between the color filter layer and the patterned electrode layer.

In an embodiment of the present invention, the patterned electrode layer includes a plurality of first electrode serials and a plurality of second electrode serials. The first electrode strings are arranged in parallel along the first direction, and the second electrode strings are arranged in parallel along a second direction perpendicular to the first direction, wherein the first electrode series and the second electrodes are arranged in series with each other Electrical insulation.

In an embodiment of the present invention, the first electrode serial and the second electrode serial respectively comprise a plurality of electrodes and a plurality of bridges connected between any two adjacent electrodes.

In an embodiment of the novel creation, the electrode has a diamond shape.

In an embodiment of the present invention, the first electrode serial and the second electrode serial are respectively composed of a plurality of strip electrodes.

In an embodiment of the present invention, the touch panel further includes an insulating layer disposed between the first electrode series and the second electrode series, wherein the first electrode series and the second electrodes One of the strings is located between the index matching layer and the insulating layer.

In an embodiment of the present invention, the material of the patterned electrode layer comprises a transparent metal oxide, a nano silver, a carbon nanotube, a graphene or a polymer conductive material.

In an embodiment of the present invention, the material of the refractive index matching layer includes yttrium oxide, tantalum nitride, yttrium oxynitride, tantalum pentoxide, photoresist, ink or a combination thereof.

Based on the above, the touch panel of the present invention can be replaced by an index matching layer. The setting is to reduce the probability that the ambient light is irradiated to the touch panel and then contacted with the patterned electrode layer to be reflected to the user's eyes. In addition, the touch display device using the touch panel described above can exhibit good display effects and quality.

The above described features and advantages of the present invention will become more apparent and understood from the following description.

1‧‧‧Touch display device

10‧‧‧ display panel

11‧‧‧ pixel array substrate

12‧‧‧Liquid layer

13‧‧‧Color filter layer

20, 100, 100A, 100B‧‧‧ touch panels

101‧‧‧ touch area

110‧‧‧Substrate

120‧‧‧index matching layer

130‧‧‧ patterned electrode layer

131‧‧‧First electrode series

131a, 132a‧‧‧ electrodes

131b, 132b‧‧‧ bridge wiring

132‧‧‧Second electrode series

140‧‧‧Insulation

D1‧‧‧ first direction

D2‧‧‧ second direction

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

2 is a cross-sectional view of the touch panel of FIG. 1 taken along line I-I.

3 is a cross-sectional view of a touch panel of another embodiment of the present invention.

4 is a cross-sectional view of a touch panel of another embodiment of the present invention.

FIG. 5 is a cross-sectional view of a touch display device according to an embodiment of the present invention.

FIG. 1 is a top plan view of a touch panel according to an embodiment of the present invention. 2 is a cross-sectional view of the touch panel of FIG. 1 taken along line I-I. Referring to FIG. 1 and FIG. 2 , in the embodiment, the touch panel 100 includes a substrate 110 and an index matching layer 120 to pattern the electrode layer 130 , wherein the touch panel is, for example, a capacitive touch panel. New creations are not limited to this.

The material of the substrate 110 is, for example, a transparent material. Here, a transparent material generally refers to a material that generally has a high light transmittance, and is not required to limit the light transmittance. Hundreds of materials. On the other hand, the substrate 110 can be a rigid substrate or a flexible substrate, which is not limited by the novel creation. For example, the material of the substrate 110 may be glass, quartz, organic polymer, polymer material or other suitable materials, wherein the polymer material is, for example, polyethylene, polypropylene, polystyrene, polymethyl methacrylate, Polyvinyl chloride, nylon, polycarbonate, polyurethane, polytetrafluoroethylene, polyethylene terephthalate and other materials.

The index matching layer 120 is disposed on the substrate 100. The refractive index matching layer 120 is formed on the substrate 100 by chemical vapor deposition, for example, in the process. Generally, the material of the index matching layer 120 is, for example, an inorganic material, which may be cerium oxide (SiO ₂ ), cerium nitride (SiN _x ), cerium oxynitride (SiO _x N _y ), bismuth pentoxide (Nb _{2 ).} O ₅ ), photoresist, ink or a combination of the above. Here, the index matching layer 120 may be composed of any of the above materials or may be formed by laminating at least two of the above materials. In a broader sense, the index matching layer 120 generally refers to a layer of material having a refractive index similar to that of the patterned electrode layer 130.

The patterned electrode layer 130 is disposed on the index matching layer 120 , wherein the index matching layer 120 is located between the substrate 110 and the patterned electrode layer 130 . As for the method of forming the patterned electrode layer 130, for example, a conductive material (that is, a material of the patterned electrode layer 130) is first formed on the index matching layer 120, and the conductive material is patterned to form the patterned electrode layer 130. . In general, the material of the patterned electrode layer 130 may include a transparent metal oxide, a nano silver, a carbon nanotube, a graphene or a polymer conductive material, wherein the transparent metal oxide is, for example, indium tin oxide (ITO), Indium zinc oxide (IZO), aluminum zinc oxide (AZO) or cadmium tin oxide, this new type of creation This is not limited. The method of forming the patterned electrode layer 130 on the index matching layer 120 is known to those of ordinary skill in the art and will not be described herein.

On the other hand, in the case of the patterned electrode layer 130 composed of nano silver, the method of forming nano silver on the index matching layer 120 may be direct coating, sputtering, or vapor deposition, etc., wherein the patterned nai The method of silver plating may include a lithography process and an etching process, wherein the etching process may be a dry etching process, a wet etching process, or other processes suitable for patterning nano silver. Compared to the patterned electrode layer 130 composed of a transparent metal oxide, nano silver is relatively easy to obtain in material and relatively inexpensive. Therefore, the use of nano silver as a constituent material of the patterned electrode layer 130 can effectively reduce the manufacturing cost, and the nano silver and the index matching layer 120 can have better bonding strength to improve the touch panel 100. Yield.

In detail, the patterned electrode layer 130 includes a plurality of first electrode serials 131 and a plurality of second electrode serials 132 , wherein the first electrode serials 131 and the second electrode serials 132 are respectively located on the touch panel 100 . Within the touch area 101. The first electrode serials 131 are arranged in parallel along the first direction D1, and the second electrode serials 132 are arranged in parallel along the second direction D2 perpendicular to the first direction D1. The first electrode serials 131 and the first The two electrode series 132 are electrically insulated from each other. On the other hand, each of the first electrode serials 131 may include a plurality of electrodes 131a and a bridge line 131b connected between any two adjacent electrodes 131a. Similarly, each of the second electrode series 132 may include a plurality of electrodes 132a. And a bridge wire 132b connected between any two adjacent electrodes 132a. Here, the shape of the electrode 131a and the electrode 132a is, for example, a diamond shape, but the invention is not limited thereto. In other embodiments, each of the first electrode strings 131 is And the second electrode serial array 132 may also be composed of a plurality of strip electrodes, or other suitable pattern electrodes, which are modulated according to actual design requirements.

Other embodiments are listed below for illustration. It is to be noted that the following embodiments use the same reference numerals and parts of the above-mentioned embodiments, and the same reference numerals are used to refer to the same or similar elements, and the description of the same technical content is omitted. For the description of the omitted portions, reference may be made to the foregoing embodiments, and the following embodiments are not repeated.

3 is a cross-sectional view of a touch panel of another embodiment of the present invention. Referring to FIG. 3 , the touch panel 100A is substantially similar to the touch panel 100 of FIG. 1 , but the main difference is that the touch panel 100A further includes an insulating layer 140 , wherein the insulating layer 140 connects the first electrode string 131 . It is separated from the second electrode serial 132. More specifically, the insulating layer 140 is disposed between the first electrode serial array 131 and the second electrode serial array 132, and one of the first electrode serial array 131 and the second electrode serial array 132 is located at an index matching. Between the layer 120 and the insulating layer 140.

Here, the second electrode serial array 132 is disposed between the index matching layer 120 and the insulating layer 140 as an example, but the novel creation is not limited thereto. In general, the material of the insulating layer 140 may be yttrium oxide (SiO ₂ ), tantalum nitride (SiNx), yttrium oxynitride (SiOxNy) or other suitable materials. On the other hand, the material forming the first electrode serial 131 and the second electrode serial 132 may be a combination of nano silver and transparent metal oxide, nano silver and nano silver or transparent metal oxide and transparent metal oxide. Thus, the transparent metal oxide or nanosilver which is superposed on the index matching layer 120 may constitute an index matching transparent metal oxide (for example, IMITO) or an index matching nano silver.

4 is a cross-sectional view of a touch panel of another embodiment of the present invention. Referring to FIG. 4 , the touch panel 100B is substantially similar to the touch panel 100A of FIG. 3 , but the main difference is that the touch panel 100B is not provided with the index matching layer 120 , wherein the first electrode serial array 131 is formed. The material of the second electrode string 132 may be a combination of nano silver and transparent metal oxide, nano silver and nano silver or transparent metal oxide and transparent metal oxide, and firstly composed of nano silver. A combination of the electrode array 131 and a second electrode train 132 of a transparent metal oxide or a refractive index-matched transparent metal oxide (e.g., IMITO) is preferred.

Specifically, the touch panel 100, 100A or 100B of the above embodiment can be adopted by the touch display device, and the specific embodiments thereof will be described below. FIG. 5 is a cross-sectional view of a touch display device according to an embodiment of the present invention. Referring to FIG. 5 , in the embodiment, the touch display device 1 can be composed of the display panel 10 and the touch panel 20 , wherein the touch panel 20 can be the touch panels 100 , 100A and 100B of the above embodiment. Any of the above (excluding the substrate 110), the detailed structure thereof can be referred to the above description, and will not be described herein.

In other words, the touch display device 1 is configured by, for example, replacing the substrate 110 of any of the touch panels 100, 100A, and 100B of the above-described embodiment with the display panel 10. Here, the display panel 10 may include a pixel array substrate 11, a liquid crystal layer 12, and a color filter layer 13, wherein the color filter layer 13 is disposed on the liquid crystal layer 12, and the liquid crystal layer 12 is located on the color filter layer 13 and the pixel. Between the array substrates 11. On the other hand, the touch panel 20 is disposed on the display panel 10, wherein the index matching layer 120 (shown in FIG. 2 or FIG. 3 ) is disposed on the color filter layer 13 and between the color filter layer 13 and the patterned electrode layer 130 (shown in FIG. 2 or FIG. 3 ). Therefore, the touch display device 1 is, for example, a touch on-cell touch display device, but the novel creation is not limited thereto.

Generally, the pixel array substrate 11 has a plurality of pixel structures, and each pixel structure can generate a specific twisting behavior of the liquid crystal layer 12 above each pixel structure according to the driving signal thereof, so that the display panel 10 produces a specific image display. Although the patterned electrode layer 130 (shown in FIG. 2 or FIG. 3) disposed in the touch area 101 (shown in FIG. 2 or FIG. 3) is not easily visible to the naked eye, it is likely to face under the illumination of ambient light. When the ambient light is irradiated onto the touch panel 20 and then contacted with the patterned electrode layer 130 (shown in FIG. 2 or FIG. 3 ) and reflected to the user's eyes, the display effect and quality of the touch display device 1 are affected. . Here, by providing the index matching layer 120 (shown in FIG. 2 or FIG. 3 ) in the touch panel 20 , the effect of reducing the ambient light to the touch panel 20 and being reflected to the user's eyes can be achieved. The control display device 1 can exhibit good display effects and quality.

In summary, the touch panel of the present invention can be used to reduce the probability that ambient light will be reflected to the user's eyes after being contacted with the patterned electrode layer by the refractive index matching layer. In addition, the touch display device using the touch panel described above can exhibit good display effects and quality.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the novel creation, and any person skilled in the art can make some changes without departing from the spirit and scope of the novel creation. Retouching, so this new The scope of protection for type creation is subject to the definition of the scope of the patent application attached.

100‧‧‧ touch panel

110‧‧‧Substrate

120‧‧‧index matching layer

130‧‧‧ patterned electrode layer

131‧‧‧First electrode series

Claims (16)

A touch panel includes: a substrate; an index matching layer disposed on the substrate; and a patterned electrode layer disposed on the index matching layer, wherein the index matching layer is located on the substrate and the pattern Between the electrode layers. The touch panel of claim 1, wherein the patterned electrode layer comprises a plurality of first electrode serials and a plurality of second electrode serials, the first electrode serials along a first direction The second electrode serials are arranged in parallel along a second direction perpendicular to the first direction, wherein the first electrode serials and the second electrode serials are electrically insulated from each other. The touch panel of claim 2, wherein each of the first electrode serials and each of the second electrode serials respectively comprise a plurality of electrodes and is connected between any two adjacent ones of the electrodes Bridge wiring. The touch panel of claim 3, wherein the electrodes are in the shape of a diamond. The touch panel of claim 2, wherein each of the first electrode serials and each of the second electrode serials is composed of a plurality of strip electrodes. The touch panel of claim 2, further comprising: an insulating layer disposed between the first electrode series and the second electrode series, wherein the first electrode series and One of the second electrode strings is located between the index matching layer and the insulating layer. The touch panel of claim 1, wherein the material of the patterned electrode layer comprises a transparent metal oxide, a nano silver, a carbon nanotube, a graphene or a polymer conductive material. The touch panel of claim 1, wherein the material of the index matching layer comprises ruthenium oxide, tantalum nitride, ruthenium oxynitride, tantalum pentoxide, photoresist, ink or a combination thereof. A touch display device includes: a display panel comprising: a pixel array substrate; a liquid crystal layer disposed on the pixel array substrate; and a color filter layer disposed on the liquid crystal layer, wherein the liquid crystal The layer is disposed between the color filter layer and the pixel array substrate; and a touch panel is disposed on the display panel, the touch panel includes: an index matching layer disposed on the color filter layer; And a patterned electrode layer disposed on the index matching layer, wherein the index matching layer is located between the color filter layer and the patterned electrode layer. The touch display device of claim 9, wherein the patterned electrode layer comprises a plurality of first electrode serials and a plurality of second electrode serials, the first electrode serials along a first The second electrode serial arrays are arranged in parallel along a second direction perpendicular to the first direction, wherein the first electrode serials and the second electrode serials are electrically insulated from each other. The touch display device of claim 10, wherein each of the touch display devices The first electrode serial and each of the second electrode serials respectively include a plurality of electrodes and a bridge connected between any two adjacent ones of the electrodes. The touch display device of claim 11, wherein the electrodes are in the shape of a diamond. The touch display device of claim 11, wherein each of the first electrode serials and each of the second electrode serials is composed of a plurality of strip electrodes. The touch display device of claim 11, wherein the touch panel further comprises: an insulating layer disposed between the first electrode series and the second electrode series, wherein the One of the first electrode series and the second electrode strings is located between the index matching layer and the insulating layer. The touch display device of claim 10, wherein the material of the patterned electrode layer comprises a transparent metal oxide, a nano silver, a carbon nanotube, a graphene or a polymer conductive material. The touch display device of claim 10, wherein the material of the index matching layer comprises ruthenium oxide, tantalum nitride, ruthenium oxynitride, tantalum pentoxide or a combination thereof.