Touch screen and display device

Patent metadata

Field	Value
Publication number	US-9639220-B2
Application number	US-201414435566-A
Country	US
Kind code	B2
Filing date	Aug 15, 2014
Priority date	Apr 9, 2014
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

Disclosed are a touch screen and a display device. In the touch screen, the first electromagnetic touch electrodes ( 210 ) and the capacitive touch sensing electrodes ( 110 ) are disposed in the same layer, the second electromagnetic touch electrodes ( 220 ) and the capacitive touch driving electrodes ( 120 ) are disposed in the same layer, such that it is possible to simplify layer structures of the touch screen to a great extent, thereby reducing the thickness of the entire touch screen, while guaranteeing electromagnetic touch effect and capacitive touch effect, and simplify the manufacturing process and in turn save the production costs of the entire touch screen.

First claim

The invention claimed is:

1. A touch screen comprising:
capacitive touch sensing electrodes;
capacitive touch driving electrodes insulated from and disposed to intersect the capacitive touch sensing electrodes;
first electromagnetic touch electrodes, insulated from and disposed in a same layer as the capacitive touch sensing electrodes;
second electromagnetic touch electrodes, insulated from and disposed in a same layer as the capacitive touch driving electrodes, and insulated from and disposed to intersect the first electromagnetic touch electrodes;
wherein the capacitive touch sensing electrodes, the capacitive touch driving electrodes, the first electromagnetic touch electrodes and the second electromagnetic touch electrodes are disposed in a same layer, and the touch screen further comprises:
a bridging layer configured for bridging adjacent capacitive touch sensing electrodes and bridging adjacent first electromagnetic touch electrodes, or a bridging layer configured for bridging adjacent capacitive touch driving electrodes and bridging adjacent second electromagnetic touch electrodes; and
an insulating layer between the bridging layer and the capacitive touch sensing electrodes, the capacitive touch driving electrodes, the first electromagnetic touch electrodes and the second electromagnetic touch electrodes disposed in a same layer.

2. The touch screen of claim 1 , wherein the first electromagnetic touch electrodes and the second electromagnetic touch electrodes are disposed on different planes, and the touch screen further comprises:
an insulating layer between the capacitive touch sensing electrodes and the first electromagnetic touch electrodes disposed in the same layer while the capacitive touch driving electrodes and the second electromagnetic touch electrodes disposed in the same layer.

3. The touch screen of claim 1 , wherein an extension direction of the first electromagnetic touch electrodes is perpendicular to an extension direction of the second electromagnetic touch electrodes.

4. The touch screen of claim 1 , wherein the first electromagnetic touch electrodes are electrode wires surrounding at least one of the capacitive touch sensing electrodes; and/or
the second electromagnetic touch electrodes are electrode wires surrounding at least one of the capacitive touch driving electrodes.

5. The touch screen of claim 4 , wherein a shape of the first electromagnetic touch electrodes is consistent with an outline shape of at least one of the capacitive touch sensing electrodes surrounded by the first electromagnetic touch electrodes; and/or
a shape of the second electromagnetic touch electrodes is consistent with an outline shape of at least one of the capacitive touch driving electrodes surrounded by the second electromagnetic touch electrodes.

6. The touch screen of claim 4 , wherein the first electromagnetic touch electrodes are in a one-to-one correspondence relationship with the capacitive touch sensing electrodes; and
the second electromagnetic touch electrodes are in a one-to-one correspondence relationship with the capacitive touch driving electrodes.

7. The touch screen of claim 1 , wherein materials for the capacitive touch sensing electrodes, the capacitive touch driving electrodes, the first electromagnetic touch electrodes and the second electromagnetic touch electrodes are all transparent conducting oxides.

8. A display device comprising a display device and the touch screen of claim 1 disposed on the display device.

9. The display device of claim 8 , wherein the display device is a liquid crystal display screen, an organic electroluminescent display screen, a plasma display screen or a cathode ray display screen.

10. The touch screen of claim 5 , wherein the first electromagnetic touch electrodes are in a one-to-one correspondence relationship with the capacitive touch sensing electrodes; and
the second electromagnetic touch electrodes are in a one-to-one correspondence relationship with the capacitive touch driving electrodes.

11. The touch screen of claim 1 , wherein the first electromagnetic touch electrodes are electrode wires surrounding at least one of the capacitive touch sensing electrodes; and/or
the second electromagnetic touch electrodes are electrode wires surrounding at least one of the capacitive touch driving electrodes.

12. The touch screen of claim 11 , wherein a shape of the first electromagnetic touch electrodes is consistent with an outline shape of at least one of the capacitive touch sensing electrodes surrounded by the first electromagnetic touch electrodes; and/or
a shape of the second electromagnetic touch electrodes is consistent with an outline shape of at least one of the capacitive touch driving electrodes surrounded by the second electromagnetic touch electrodes.

13. The touch screen of claim 11 , wherein the first electromagnetic touch electrodes are in a one-to-one correspondence relationship with the capacitive touch sensing electrodes; and
the second electromagnetic touch electrodes are in a one-to-one correspondence relationship with the capacitive touch driving electrodes.

14. The touch screen of claim 12 , wherein the first electromagnetic touch electrodes are in a one-to-one correspondence relationship with the capacitive touch sensing electrodes; and
the second electromagnetic touch electrodes are in a one-to-one correspondence relationship with the capacitive touch driving electrodes.

15. The touch screen of claim 1 , wherein materials for the capacitive touch sensing electrodes, the capacitive touch driving electrodes, the first electromagnetic touch electrodes and the second electromagnetic touch electrodes are all transparent conducting oxides.

16. The touch screen of claim 2 , wherein the first electromagnetic touch electrodes are electrode wires surrounding at least one of the capacitive touch sensing electrodes; and/or
the second electromagnetic touch electrodes are electrode wires surrounding at least one of the capacitive touch driving electrodes.

17. The touch screen of claim 16 , wherein a shape of the first electromagnetic touch electrodes is consistent with an outline shape of at least one of the capacitive touch sensing electrodes surrounded by the first electromagnetic touch electrodes; and/or
a shape of the second electromagnetic touch electrodes is consistent with an outline shape of at least one of the capacitive touch driving electrodes surrounded by the second electromagnetic touch electrodes.

18. The touch screen of claim 16 , wherein the first electromagnetic touch electrodes are in a one-to-one correspondence relationship with the capacitive touch sensing electrodes; and
the second electromagnetic touch electrodes are in a one-to-one correspondence relationship with the capacitive touch driving electrodes.

19. The touch screen of claim 17 , wherein the first electromagnetic touch electrodes are in a one-to-one correspondence relationship with the capacitive touch sensing electrodes; and
the second electromagnetic touch electrodes are in a one-to-one correspondence relationship with the capacitive touch driving electrodes.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Wang Xinxing

Classifications

• G06F3/046 Primary

  by electromagnetic means · CPC title

• G06F2203/04106

  Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection · CPC title

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F3/0445

  using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer · CPC title