Touch screen and manufacturing method thereof, display device

Patent metadata

Field	Value
Publication number	US-9740344-B2
Application number	US-201314361896-A
Country	US
Kind code	B2
Filing date	Dec 9, 2013
Priority date	Sep 13, 2013
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

A touch screen includes a plurality of first transparent electrodes extending in a first direction and a plurality of second transparent electrodes extending in a second direction intersecting the first direction disposed on the substrate; first conductive layers located on at least one side of the first transparent electrodes and connected in parallel with the first transparent electrodes; and/or second conductive layers located on at least one side of the second transparent electrodes and connected in parallel with the second transparent electrodes; the first conductive layers and the second conductive layers are metal layers or alloy layers. A manufacturing method of the touch screen and a display device having the touch screen are further disclosed.

First claim

The invention claimed is:

1. A touch screen comprising:
a plurality of first transparent electrodes and a plurality of second transparent electrodes disposed on a substrate;
first conductive layers disposed on two sides of the first transparent electrodes and connected in parallel with the first transparent electrodes, and/or second conductive layers disposed on two sides of the second transparent electrodes and connected in parallel with the second transparent electrodes;
wherein one set of the first transparent electrodes and the second transparent electrodes are touch driving electrodes, the other set are touch sensing electrodes, and the first conductive layers and the second conductive layers are metal layers or alloy layers; and
wherein the first conductive layers comprise a plurality of first electrodes, the first transparent electrodes are slit-like, and projections of slits of the first transparent electrodes overlap with projections of slits between the first electrodes of the first conductive layers on the substrate.

2. The touch screen of claim 1 , wherein the first transparent electrodes extend in a first direction and the second transparent electrodes extend in a second direction intersecting the first direction.

3. The touch screen of claim 2 , wherein the first transparent electrodes are broken into a plurality of first transparent sub-electrodes at intersection areas with the second transparent electrodes; and adjacent first transparent sub-electrodes are connected through conductive sheets.

4. The touch screen of claim 2 , wherein the first transparent electrodes and the second transparent electrodes are formed by connecting in series a plurality of diamond shaped sub-electrodes respectively; or
the first transparent electrodes and the second transparent electrodes are formed by connecting in series a plurality of rectangular sub-electrodes respectively; or
the second transparent electrodes are strip-like electrodes.

5. The touch screen of claim 1 , wherein the first transparent electrodes and the second transparent electrodes extend in a first direction and are arranged by coupling without any intersection, crossover and joint therebetween.

6. The touch screen of claim 5 , wherein the first transparent electrodes are provided with a plurality of hollowed-out areas of regular pattern, which are non-closed hollowed-out areas with openings at edges of the first transparent electrodes;
the second transparent electrodes comprise a plurality of sub-electrodes disposed at hollowed-out areas of the first transparent electrodes, each of the sub-electrodes is connected by a wire adjacent to the first transparent electrodes, and the wire is connected with corresponding sub-electrodes through an opening at an edge of the first transparent electrodes and is insulated from the first transparent electrodes.

7. The touch screen of claim 1 , wherein the plurality of first electrodes from the first conductive layers in a first direction; and
the second conductive layers comprise a plurality of second electrodes extending in a second direction intersecting the first direction.

8. The touch screen of claim 7 ,
wherein the second transparent electrodes are slit-like, and projections of slits of the second transparent electrodes overlap with projections of slits between the second electrodes on the substrate.

9. The touch screen of claim 8 , wherein the first conductive layers further comprise a plurality of third electrodes extending in the second direction to make the first conductive layers to be grid-like first conductive layers; and
the second conductive layers further comprise a plurality of fourth electrodes extending in the first direction to make the second conduct layers to be grid-like second conductive layers.

10. The touch screen of claim 9 , wherein the first transparent electrodes are grid-like, and hollowed-out areas in the grid-like first transparent electrodes overlap with projections, on the substrate, of hollowed-out areas in the grid-like first conductive layers; and
the second transparent electrodes are grid-like, and hollowed-out areas in the grid-like second transparent electrodes overlap with projections, on the substrate, of hollowed-out areas in the grid-like second conductive layers.

11. The touch screen of claim 1 , wherein the first conductive layers are formed of metallic copper, metallic aluminum, metallic molybdenum or metallic neodymium or an alloy containing at least two metals of metallic copper, metallic aluminum, metallic molybdenum or metallic neodymium;
the second conductive layers are formed of metallic copper, metallic aluminum, metallic molybdenum or metallic neodymium or an alloy containing at least two metals of metallic copper, metallic aluminum, metallic molybdenum or metallic neodymium.

12. The touch screen of claim 1 , further comprising:
first leads for connecting the first transparent electrodes with a signal source for providing signals to the first transparent electrodes; and
second leads for connecting the second transparent electrodes with another signal source for providing signals to the second transparent electrodes;
wherein the first conductive layers further comprise parts on two sides of the first lead and connected in parallel with the first lead; and
the second conductive layers further comprise parts on two sides of the second lead and connected in parallel with the second lead.

13. A display device comprising the touch screen of claim 1 , wherein the first conductive layers and the second conductive layers in the touch screen are located in areas corresponding to black matrix in the touch screen.

14. The display device of claim 13 , wherein the first transparent electrodes are slit-like, and slits of the first transparent electrodes overlap with projections of slits between the first electrodes in the vertical direction; the second transparent electrodes are slit-like, and slits of the second transparent electrodes overlap with projections of slits between the second electrodes in the vertical direction; the slits in the first transparent electrodes and the slits in the second transparent electrodes correspond to transmitting areas of pixels in the display device;
or,
the first transparent electrodes are grid-like, and slits of the first transparent electrodes overlap with projections of slits between the first electrodes and the third electrodes in the vertical direction; the second transparent electrodes are grid-like, and slits of the second transparent electrodes overlap with projections of slits between the second electrodes and the fourth electrodes in the vertical direction; the slits in the first transparent electrodes and the slits in the second transparent electrodes correspond to transmitting areas of pixels in the display device.

15. A manufacturing method of a touch screen comprising:
forming a plurality of first transparent electrodes and a plurality of second transparent electrodes on a substrate; and
forming first conductive layers connected in parallel with the first transparent electrodes on two sides of the first transparent electrodes, and/or forming second conductive layers connected in parallel with the second transparent electrodes on two sides of the second transparent electrodes;
wherein the first conductive layers and the second conductive layers are metal layers or alloy layers; and
wherein the first conductive layers comprise a plurality of first electrodes, the first transparent electrodes are slit-like, and projections of slits of the first transparent electrodes overlap with projections of slits between

Assignees

• Boe Technology Group Co Ltd
• Chengdu Boe Optoelect Tech Co

Inventors

• Huang Weiyun
• Ko Young Yik
• Nan Yingying
• Xuan Minghua

Classifications

• 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

• G06F2203/04111

  Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• Y10T29/49147

  Assembling terminal to base · CPC title

• G06F3/0446 Primary

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title