Touch screen with ESD protection circuit and device including the same

Patent metadata

Field	Value
Publication number	US-10409403-B2
Application number	US-201615528431-A
Country	US
Kind code	B2
Filing date	May 6, 2016
Priority date	Mar 4, 2016
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

Embodiments of the present disclosure provide a touch screen and a device. The touch screen includes a bezel region and a touch region, wherein the touch screen includes an annular wire provided on the bezel region. The wire further includes at least one pair of opposing discharge terminals. The device includes the touch screen, and further includes a conductive foam configured to connect the wire and a housing of the device. According to the embodiments of the present disclosure, the ESD resistance of the touch screen and the device including the touch screen is enhanced, the service life of the touch screen and the device including the touch screen is extended, the stability of the touch screen and the device including the touch screen is improved, and customers will have a better user experience without any other additional risk.

First claim

What is claimed is:

1. A touch screen comprising:
a bezel region; and
a touch region, wherein the touch screen comprises an annular wire provided on the bezel region, wherein the annular wire comprises at least one pair of opposing discharge terminals, and wherein the annular wire further comprises a dummy ground, wherein a width of the dummy ground is greater than a width of the other regions of the annular wire;
wherein the annular wire comprising the dummy ground is included in a circuit layer of the touch screen;
wherein the circuit layer further comprises:
a wiring for connecting the electrodes, wherein the annular wire and the wiring for connecting the electrodes are formed in the circuit layer in a single production step;
wherein the annular wire is on a black matrix layer; and
wherein the wiring connecting the electrodes leads to a region on the black matrix layer in the bezel region to form a bonding region for a connection between the touch screen and an external circuit.

2. The touch screen according to claim 1 , wherein each discharge terminal is a sharp end.

3. The touch screen according to claim 1 , wherein the touch screen further comprises a protective layer, wherein the protective layer covers the bezel region and the touch region, and wherein the protective layer opens at a position corresponding to the dummy ground and at a position corresponding to a bonding region for connecting the touch screen and an external circuit.

4. The touch screen according to claim 3 , wherein the touch screen further comprises a strippable adhesive layer, and wherein the strippable adhesive layer covers the protective layer and the dummy ground.

5. The touch screen according to claim 1 , wherein the annular wire is made of metal.

6. A device comprising a touch screen, wherein the touch screen comprises a bezel region and a touch region, wherein the touch screen comprises an annular wire provided on the bezel region, and wherein the device further comprises a conductive foam configured to connect the annular wire of the touch screen and a housing of the device,
wherein the annular wire comprises a dummy ground having a width greater than the other regions of the annular wire, and wherein the conductive foam is connected to the dummy ground;
wherein the annular wire comprising the dummy ground is included in a circuit layer of the touch screen;
wherein the circuit layer further comprises:
a wiring for connecting electrodes;
wherein the annular wire and the wiring for connecting the electrodes are formed in the circuit layer in a single production step;
wherein the annular wire is on a black matrix layer; and
wherein the wiring connecting the electrodes leads to a region on the black matrix layer in the bezel region to form a bonding region for a connection between the touch screen and an external circuit.

7. The device according to claim 6 , wherein the annular wire comprises at least one pair of opposing discharge terminals.

8. The device according to claim 7 , wherein each discharge terminal is a sharp end.

9. The device according to claim 6 , wherein the touch screen further comprises a protective layer, wherein the protective layer covers the bezel region and the touch region, and wherein the protective layer opens at a position corresponding to the dummy ground and at a position corresponding to a bonding region for connecting the touch screen and an external circuit.

10. The device according to claim 9 , wherein the touch screen further comprises a strippable adhesive layer, and wherein the strippable adhesive layer covers the protective layer and the dummy ground.

11. The device according to claim 6 , wherein the annular wire is made of metal.

Assignees

• Boe Technology Group Co Ltd
• Hefei Xinsheng Optoelectronics Technology Co Ltd

Inventors

• Wu Lingyan
• Zhang Lei
• Xie Taofeng
• Wei Guangchao
• Liu Yang

Classifications

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G06F2203/04107

  Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds · CPC title

• G06F3/041

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• G06F3/045

  using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact · CPC title

• G06F3/047

  using sets of wires, e.g. crossed wires · CPC title