Display substrate and manufacturing method thereof, touch panel, and display device

Patent metadata

Field	Value
Publication number	US-9529483-B2
Application number	US-201414415853-A
Country	US
Kind code	B2
Filing date	Apr 18, 2014
Priority date	Dec 17, 2013
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

The present invention provides a display substrate and a manufacturing method thereof, a touch panel comprising the display substrate, and a display device. The display substrate comprises: a first substrate; a thin film transistor, a first electrode and a second electrode formed on one side of the first substrate; and a black matrix and a color filter layer formed on the other side of the first substrate, wherein at least one of the black matrix and the color filter layer is made of conductive material, a display electric field is formed between the first electrode and the second electrode, and a touch-control electric field is formed between the first electrode and the black matrix and/or the color filter layer. The solution of the invention can improve accuracy of determination of location where touch occurs and display quality, and reduce thickness of the display substrate.

First claim

The invention claimed is:

1. A display substrate, characterized by comprising:
a first substrate comprising a first side and a second side opposite to the first side;
a thin film transistor disposed directly on the first side of the first substrate;
a first electrode disposed directly on the thin film transistor;
a second electrode disposed on the first electrode; and
a black matrix and a color filter layer disposed in a same layer on the second side of the first substrate,
wherein at least one of the black matrix and the color filter layer is made of conductive material, a display electric field is formed between the first electrode and the second electrode, and a touch-control electric field is formed between the first electrode and the black matrix and/or the color filter layer.

2. The display substrate of claim 1 , wherein the first electrode is a pixel electrode, and the second electrode is a common electrode.

3. The display substrate of claim 1 , wherein a light shielding layer is disposed on a side of the thin film transistor away from the first substrate.

4. The display substrate of claim 1 , wherein the black matrix comprises a plurality of sub black matrices which are disposed with intervals there between.

5. A display device, characterized by comprising a touch panel, the touch panel comprising the display substrate of claim 1 , a second substrate which is disposed opposite to the display substrate, and a liquid crystal layer disposed between the display substrate and the second substrate,
wherein the first side of the first substrate in the display substrate faces the liquid crystal layer.

6. The display device of claim 5 , wherein the first electrode is a pixel electrode, and the second electrode is a common electrode.

7. The display device of claim 5 , wherein a light shielding layer is disposed on the thin film transistor.

8. The display device of claim 5 , wherein the black matrix comprises a plurality of sub black matrices which are disposed with intervals there between.

9. A manufacturing method of a display substrate, characterized by comprising:
forming a thin film transistor directly on a first side of a first substrate;
forming a first electrode directly on the thin film transistor;
forming a second electrode on the first electrode, a display electric field being formed between the first electrode and the second electrode; and
forming a black matrix and a color filter layer in a same layer on the second side of the first substrate, at least one of the black matrix and the color filter layer being made of a conductive material, and a touch-control electric field being formed between the first electrode and the black matrix and/or the color filter layer.

10. The manufacturing method of a display substrate of claim 9 , wherein the first electrode functions as a pixel electrode, and the second electrode functions as a common electrode.

11. The manufacturing method of display substrate of claim 9 , further comprising forming a light shielding layer on the thin film transistor.

12. The manufacturing method of display substrate of claim 9 , wherein the black matrix comprises a plurality of sub black matrices which are disposed with intervals there between.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Qin Wei
• Zhao Jiayang
• Zou Xiangxiang

Classifications

• G06F3/044 Primary

  by capacitive means · CPC title

• G02F1/13338 Primary

  Input devices, e.g. touch panels · CPC title

• G06F3/041

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

• G06F2203/04103

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

• G02F1/133509

  Filters, e.g. light shielding masks · CPC title