Touch panel, method for manufacturing touch panel, and display device

Patent metadata

Field	Value
Publication number	US-11237670-B2
Application number	US-202016825862-A
Country	US
Kind code	B2
Filing date	Mar 20, 2020
Priority date	Aug 28, 2019
Publication date	Feb 1, 2022
Grant date	Feb 1, 2022

Abstract

A touch panel, a method for manufacturing a touch panel, and a display device are provided. The touch panel includes a first transparent electrically conductive layer and a second transparent electrically conductive layer stacked on each other. The first transparent electrically conductive layer includes a first gap region and a first transparent electrically conductive film region. The first gap region and the first transparent electrically conductive film region form a touch sensing electrode pattern. The second transparent electrically conductive layer includes a second gap region and a second transparent electrically conductive film region. The second transparent electrically conductive film region and the second gap region form a shielding pattern. A position of the second transparent electrically conductive film region on the second transparent electrically conductive layer corresponds to a position of the first gap region on the first transparent electrically conductive layer.

First claim

The invention claimed is:

1. A touch panel, comprising:
a first transparent electrically conductive layer; and
a second transparent electrically conductive layer, wherein the first and second transparent electrically conductive layers are stacked on each other,
wherein the first transparent electrically conductive layer comprises a first gap region and a first transparent electrically conductive film region, the first gap region and the first transparent electrically conductive film region forming a touch sensing electrode pattern,
wherein the second transparent electrically conductive layer comprises a second gap region and a second transparent electrically conductive film region, the second transparent electrically conductive film region and the second gap region forming a shielding pattern,
wherein a position of the second transparent electrically conductive film region on the second transparent electrically conductive layer corresponds to a position of the first gap region on the first transparent electrically conductive layer,
wherein the first transparent electrically conductive film region is divided into a first electrode and a second electrode by the first gap region, the first electrode comprises two first sub-electrodes which are electrically conductively connected to each other, and the second electrode comprises two second sub-electrodes separated from each other by an insulating isolation region, and
wherein an orthographic projection of the second gap region on the first transparent electrically conductive layer covers the first electrode and the second electrode.

2. The touch panel according to claim 1 , wherein an orthographic projection of the second transparent electrically conductive film region on the first transparent electrically conductive layer completely covers the first gap region.

3. The touch panel according to claim 1 , wherein the first transparent electrically conductive film region and the second transparent electrically conductive film region each comprise an indium tin oxide film.

4. The touch panel according to claim 1 , wherein the touch panel further comprises a display layer, the first transparent electrically conductive layer or the second transparent electrically conductive layer is adhered to a surface of the display layer.

5. The touch panel according to claim 1 , wherein the first sub-electrodes and the second sub-electrodes are each substantially triangular or substantially quadrangular.

6. The touch panel according to claim 1 , wherein the touch panel further comprises an additional insulating layer disposed on a side of the second transparent electrically conductive layer away from the first transparent electrically conductive layer.

7. A display device comprising the touch panel according to claim 1 .

8. The touch panel according to claim 1 , wherein a transparent electrically conductive film in the second transparent electrically conductive film region comprises a bridge portion for connecting the two second sub-electrodes in the first transparent electrically conductive film region which are insulated from each other.

9. The touch panel according to claim 8 , wherein an orthographic projection of the bridge portion on the first transparent electrically conductive layer covers the insulating isolation region.

10. The touch panel according to claim 8 , wherein the bridge portion comprises a horizontal portion and two extension portions extending toward the first transparent electrically conductive layer along ends of the horizontal portion, an orthographic projection of the horizontal portion on the first transparent electrically conductive layer covers the insulating isolation region, and the two extension portions are in contact with the two second sub-electrodes, respectively.

11. The touch panel according to claim 10 , wherein an insulating layer is provided between the first transparent electrically conductive layer and the second transparent electrically conductive layer, and an orthographic project of the insulating layer on the second transparent electrically conductive layer covers the horizontal portion of the bridge portion.

12. The touch panel according to claim 8 , wherein the bridge portion is insulated from a portion of the second transparent electrically conductive film region other than the bridge portion.

13. The touch panel according to claim 12 , wherein the portion of the second transparent electrically conductive film region other than the bridge portion is configured to be grounded.

14. A method for manufacturing a touch panel, the method comprising:
forming a first gap region and a first transparent electrically conductive film region on a base substrate to form a first transparent electrically conductive layer having a touch sensing electrode pattern; and
forming a second gap region and a second transparent electrically conductive film region on the first transparent electrically conductive layer by one patterning process, to form a second transparent electrically conductive layer having a shielding pattern,
wherein a position of the second transparent electrically conductive film region on the second transparent electrically conductive layer corresponds to a position of the first gap region on the first transparent electrically conductive layer,
wherein the first transparent electrically conductive film region is divided into a first electrode and a second electrode by the first gap region, the first electrode comprises two first sub-electrodes which are electrically conductively connected to each other, and the second electrode comprises two second sub-electrodes separated from each other by an insulating isolation region, and
wherein an orthographic projection of the second gap region on the first transparent electrically conductive layer covers the first electrode and the second electrode.

15. The method according to claim 14 , wherein before forming the second transparent electrically conductive layer, the method further comprises: forming an insulating layer on the first transparent electrically conductive layer,
wherein the second transparent electrically conductive layer is formed on the insulating layer.

16. The method according to claim 15 , wherein the method further comprises: forming an additional insulating layer on a side of the second transparent electrically conductive layer away from the first transparent electrically conductive layer.

17. The method according to claim 14 , wherein a transparent electrically conductive film in the second transparent electrically conductive film region comprises a bridge portion for connecting two sub-electrodes in the first transparent electrically conductive film region which are insulated from each other.

18. The method according to claim 17 , wherein the method further comprises:
grounding a portion of the second transparent electrically conductive film region other than the bridge portion,
wherein the bridge portion is insulated from the portion of the second transparent electrically conductive film region other than the bridge portion.

Assignees

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

Inventors

• Yin Li
• Wang Qingpu
• Zhang Zhi
• Li Bisheng
• Fang Zhenzhong

Classifications

• G06F2203/04103

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

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/044

  by capacitive means · CPC title

• G02F1/13338

  Input devices, e.g. touch panels · 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