Display substrate, in cell touch panel and display device

Patent metadata

Field	Value
Publication number	US-11016592-B2
Application number	US-201916399259-A
Country	US
Kind code	B2
Filing date	Apr 30, 2019
Priority date	Jul 25, 2018
Publication date	May 25, 2021
Grant date	May 25, 2021

Abstract

A display substrate, an in cell touch panel and a display device are provided. The black matrix includes at least one first touch electrode and at least one second touch electrode insulated from each other and intersecting with each other, and both the first touch electrode and the second touch electrode are in a grid structure, that is, the first touch electrode and the second touch electrode arranged to intersect with each other are reused as the black matrix.

First claim

The invention claimed is:

1. A display substrate, comprising:
a base substrate, and
a plurality of color photo-resist layers and a black matrix on the base substrate, an orthographic projection of the black matrix on the base substrate covering orthographic projections of gaps between adjacent color photo-resist layers on the base substrate;
wherein the black matrix comprises: at least one first touch electrode extending in a first direction, and at least one second touch electrode extending in a second direction, the first touch electrode is insulated from the second touch electrode, and the first direction intersects with the second direction;
an orthographic projection of the first touch electrode on the base substrate and an orthographic projection of the second touch electrode on the base substrate covering orthographic projections of gaps between adjacent color photo-resist layers on the base substrate;
each of the at least one first touch electrode and each of the at least one second touch electrode have grid structures;
the first touch electrode is arranged at a different layer from the second touch electrode, and an insulation layer is arranged between the first touch electrode and the second touch electrode;
the first touch electrode comprises a first blackened metal layer, a first transition layer, a metal layer, a second transition layer, and a second blackened metal layer stacked successively; and
the second touch electrode comprises a first blackened metal layer, a first transition layer, a metal layer, a second transition layer, and a second blackened metal layer stacked successively.

2. The display substrate according to claim 1 , wherein the black matrix further comprises at least one of:
a first light-shielding block between adjacent first touch electrodes, and insulated from the first touch electrodes; or
a second light-shielding block between adjacent second touch electrodes, and insulated from the second touch electrodes.

3. The display substrate according to claim 1 , wherein the black matrix further comprises at least one of:
a first dummy electrode between adjacent first touch electrodes, and insulated from the first touch electrodes; or
a second dummy electrode between adjacent second touch electrodes, and insulated from the second touch electrodes.

4. The display substrate according to claim 3 , wherein the black matrix further comprises at least one of:
a first light-shielding block between adjacent first touch electrode and the first dummy electrode, and insulated from the first touch electrodes; or
a second light-shielding block between adjacent second touch electrode and the second dummy electrode, and insulated from the second touch electrode.

5. The display substrate according to claim 2 , wherein the first light-shielding block is arranged at a same layer as the second touch electrode; and
the second light-shielding block is arranged at a same layer as the first touch electrode.

6. The display substrate according to claim 5 , wherein a line width of the first light-shielding block is more than a line width of a grid of the second touch electrode; and
a line width of the second light-shielding block is more than a line width of a grid of the first touch electrode.

7. An in cell touch panel, comprising an array substrate and an opposite substrate, both of which are opposite to each other, a black matrix being arranged on a side of the array substrate facing the opposite substrate, or a side of the opposite substrate facing the array substrate, a plurality of color photo-resist layers, and an orthographic projection of the black matrix on the base substrate covering orthographic projections of gaps between adjacent color photo-resist layers on the base substrate;
wherein the black matrix comprises: at least one first touch electrode extending in a first direction, and at least one second touch electrode extending in a second direction, the first touch electrode is insulated from the second touch electrode, and the first direction intersects with the second direction;
an orthographic projection of the first touch electrode on the base substrate and an orthographic projection of the second touch electrode on the base substrate covering orthographic projections of gaps between adjacent color photo-resist layers on the base substrate;
each of the at least one first touch electrode and each of the at least one second touch electrode have grid structures;
electrode, and an insulation layer is arranged between the first touch electrode and the second touch electrode;
the first touch electrode comprises a first blackened metal layer, a first transition layer, a metal layer, a second transition layer, and a second blackened metal layer stacked successively; and
the second touch electrode comprises a first blackened metal layer, a first transition layer, a metal layer, a second transition layer, and a second blackened metal layer stacked successively.

8. The in cell touch panel according to claim 7 , wherein the black matrix further comprises at least one of:
a first light-shielding block between adjacent first touch electrodes, and insulated from the first touch electrodes; or
a second light-shielding block between adjacent second touch electrodes, and insulated from the second touch electrodes.

9. The in cell touch panel according to claim 7 , wherein the black matrix further comprises at least one of:
a first dummy electrode between adjacent first touch electrodes, and insulated from the first touch electrodes; or
a second dummy electrode between adjacent second touch electrodes, and insulated from the second touch electrodes.

10. The in cell touch panel according to claim 9 , wherein the black matrix further comprises at least one of:
a first light-shielding block between adjacent first touch electrode and the first dummy electrode, and insulated from the first touch electrode; or
a second light-shielding block between adjacent second touch electrode and the second dummy electrode, and insulated from the second touch electrode.

11. The in cell touch panel according to claim 8 , wherein the first light-shielding block is arranged at a same layer as the second touch electrode; and
the second light-shielding block is arranged at a same layer as the first touch electrode.

12. The in cell touch panel according to claim 11 , wherein a line width of the first light-shielding block is more than a line width of a grid of the second touch electrode; and
a line width of the second light-shielding block is more than a line width of a grid of the first touch electrode.

13. The in cell touch panel according to claim 7 , further comprising a color photo-resist layer;
wherein both the color photo-resist layer and the black matrix are on a side of the array substrate facing the opposite substrate, or both the color photo-resist layer and the black matrix are on a side of the opposite substrate facing the array substrate.

14. A display device, comprising the in cell touch panel according to claim 7 .

Assignees

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

Inventors

• Yin Liuyue
• Zhang Ming
• Chen Qicheng
• Hu Haifeng
• Ma Weijie
• Du Zhi
• Zeng Ting
• Li Bin

Classifications

• G02F1/134309

  characterised by their geometrical arrangement · CPC title

• G06F3/044

  by capacitive means · CPC title

• G02F1/133512

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• G02F1/13338

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

• G06F3/0445 Primary

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