Touch panel

Patent metadata

Field	Value
Publication number	US-9987827-B2
Application number	US-201514967349-A
Country	US
Kind code	B2
Filing date	Dec 13, 2015
Priority date	May 21, 2015
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

The disclosure relates to a touch panel. The touch panel includes a substrate having a surface, a transparent conductive layer, at least one electrode, and a conductive trace. The transparent conductive layer includes a metal nanowire film. The metal nanowire film includes a number of first metal nanowire bundles parallel with and spaced from each other. Each of the number of first metal nanowire bundles includes a number of first metal nanowires parallel with each other. The first distance between adjacent two of the number of first metal nanowires is less than the second distance between adjacent two of the number of first metal nanowire bundles.

First claim

What is claimed is:

1. A touch panel, comprising:
a substrate having a first surface and a second surface opposite to the first surface;
a first transparent conductive layer located on the first surface of the substrate, wherein the first transparent conductive layer comprises a plurality of first metal nanowire bundles parallel with, spaced from each other and extending along an X direction parallel to the first surface; each of the plurality of first metal nanowire bundles comprises a plurality of first metal nanowires parallel with each other; and first distance between adjacent first metal nanowires is less than a second distance between adjacent first metal nanowire bundles
a second transparent conductive layer located on the second surface of the substrate, wherein the second transparent conductive layer has the least resistance along a Y direction parallel to the second surface, and the X direction and the Y direction are perpendicular with each other;
a plurality of first electrodes arranged on a side of the first transparent conductive layer, along the Y direction, and electrically connected with the first transparent conductive layer;
a plurality of second electrodes arranged on a side of the second transparent conductive layer, along the X direction, and electrically connected with the second transparent conductive layer;
a first conductive trace located on the first surface of the substrate and electrically connected with the plurality of first electrodes; and
a second conductive trace located on the second surface of the substrate and electrically connected with the plurality of second electrodes.

2. The touch panel of claim 1 , wherein the second transparent conductive layer comprises a carbon nanotube film.

3. The touch panel of claim 1 , wherein the second transparent conductive layer comprises a patterned ITO layer.

4. The touch panel of claim 1 , wherein the second transparent conductive layer comprises a plurality of second metal nanowire bundles parallel with, spaced from each other and extending along the Y direction parallel to the second surface; each of the plurality of second metal nanowire bundles comprises a plurality of second metal nanowires parallel with each other; and a third distance between adjacent second metal nanowires is less than a fourth distance between adjacent second metal nanowire bundles.

5. The touch panel of claim 1 , wherein the substrate is curved.

6. The touch panel of claim 1 , wherein the substrate is flexible.

Assignees

• Univ Tsinghua
• Hon Hai Prec Ind Co Ltd

Inventors

• Jin Yuan-Hao
• Li Qun-Qing
• Fan Shou-Shan

Classifications

• C23C30/00

  Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process (C23C26/00, C23C28/00 take precedence) · CPC title

• C03C2218/34

  Masking · CPC title

• C23C16/56

  After-treatment · CPC title

• H01B1/16

  the conductive material comprising metals or alloys · CPC title

• G06F2203/04112

  Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material · CPC title