Touch display substrate with a conductive shield layer and method for manufacturing the same, display device and method for driving the same

• US 10,928,936 B2
• Filed: 07/06/2018
• Issued: 02/23/2021
• Est. Priority Date: 01/03/2018
• Status: Active Grant

• Current Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Xu, Shuai, Song, Yong, Wang, Zhiyong
• Primary Examiner(s): Mistry, Ram A
• Application Number:
  US16/029,173
• Publication Number:
  US 20190204942A1
• Time in Patent Office: 963 Days
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes

Abstract

A touch display substrate includes a touch region, a non-touch region, a plurality of touch electrodes at the touch region, periphery wires at the non-touch region, and a conductive shield layer above the periphery wires. The conductive shield layer covers at least one of the periphery wires.

Claims

1. A touch display substrate comprising:

a touch region;

a non-touch region;

a plurality of touch electrodes at the touch region;

periphery wires at the non-touch region; and

a conductive shield layer covering one side of all the periphery wires away from the touch display substrate;

wherein an orthographic projection of the conductive shield layer to the touch display substrate and an orthographic projection of all the periphery wires to the touch display substrate at least partially overlap with each other;

the conductive shield layer and the touch electrodes are within an identical layer, made of a same material and formed simultaneously by using an exposure and development process;

the touch display substrate further comprises a driver chip at the non-touch region;

wherein the driver chip is coupled to the conductive shield layer to supply a touch drive signal or a common voltage signal to the conductive shield layer;

wherein the orthographic projection of all the periphery wires to the touch display substrate is completely within the orthographic projection of the conductive shield layer to the touch display substrate.

2. The touch display substrate of claim 1, further comprising an insulation layer between the conductive shield layer and the periphery wires.

3. The touch display substrate of claim 1, wherein the conductive shield layer is spaced from the touch electrodes.

4. The touch display substrate of claim 1, wherein the conductive shield layer extends along a periphery of the touch electrodes, and defines a U-shape.

5. The touch display substrate of claim 4, wherein the touch electrodes are within the U-shape defined by the conductive shield layer.

6. A display device comprising the touch display substrate of claim 1.

7. The display device of claim 6, further comprising a color substrate that is arranged opposite to the touch display substrate;

wherein the color substrate comprises a base substrate, a black matrix at the base substrate and a color filter unit;

there is an overlapping region between an orthographic projection of the black matrix to the base substrate and an orthographic projection of the periphery wires to the base substrate; and

an orthographic projection of the conductive shield layer to the base substrate covers the whole overlapping region.

8. The display device of claim 6, further comprising a driver chip at the non-touch region;

wherein the conductive shield layer is coupled to the driver chip.

9. The display device of claim 6, further comprising an insulation layer between the conductive shield layer and the periphery wires.

10. The display device of claim 6, wherein the conductive shield layer and the touch electrodes are within an identical layer, and the conductive shield layer is spaced from the touch electrodes.

11. The display device of claim 6, wherein the conductive shield layer extends along a periphery of the touch electrodes, and defines a U-shape.

12. The display device of claim 6, wherein the touch electrodes are within the U-shape defined by the conductive shield layer.

13. A method for driving the display device of claim 6, comprising:

simultaneously supplying a touch drive signal to the touch electrodes and the conductive shield layer when the display device works in a touch period.

14. The method of claim 13, further comprising:

simultaneously supplying a common voltage signal to the touch electrodes and the conductive shield layer when the display device works in a display period.

15. A method for manufacturing a touch display substrate that comprises a touch region, a non-touch region, a plurality of touch electrodes at the touch region, periphery wires at the non-touch region and a driver chip at the non-touch region, the method comprising:

forming a conductive shield layer covering one side of all the periphery wires away from the touch display substrate, wherein an orthographic projection of the conductive shield layer to the touch display substrate and an orthographic projection of all the periphery wires to the touch display substrate at least partially overlap with each other;

the driver chip is coupled to the conductive shield layer to supply a touch drive signal or a common voltage signal to the conductive shield layer;

wherein the forming the conductive shield layer covering one side of all the periphery wires away from the touch display substrate comprises;

forming the conductive shield layer and the touch electrodes simultaneously through an exposure and development process, and

wherein the orthographic projection of all the periphery wires to the touch display substrate is completely within the orthographic projection of the conductive shield layer to the touch display substrate.

16. The method of claim 15, wherein before the forming a conductive shield layer covering one side of all the periphery wires away from the touch display substrate, the method further comprises:

forming an insulation layer covering the periphery wires; and

the forming a conductive shield layer covering one side of all the periphery wires away from the touch display substrate comprises;

forming the conductive shield layer and the touch electrodes at the insulation layer.