Display substrate, method for manufacturing same, and display device

Patent metadata

Field	Value
Publication number	US-11983340-B2
Application number	US-202117486827-A
Country	US
Kind code	B2
Filing date	Sep 27, 2021
Priority date	Sep 30, 2020
Publication date	May 14, 2024
Grant date	May 14, 2024

Abstract

A display substrate is provided. The display substrate includes: a base substrate; a pixel defining layer disposed on the base substrate, wherein the pixel defining layer defines a plurality of sub-pixel areas and has a groove therein; and a touch structure disposed in the groove, wherein the touch structure is configured to provide a touch function.

First claim

What is claimed is:

1. A display substrate, comprising:
a base substrate;
a pixel defining layer disposed on the base substrate, wherein the pixel defining layer defines a plurality of sub-pixel areas and has a groove therein; and
a touch structure disposed in the groove, wherein the touch structure is configured to provide a touch function; wherein
the touch structure comprises a plurality of touch electrodes, wherein each of the touch electrodes corresponds to at least one sub-pixel area, and an area corresponding to the sub-pixel area of the touch electrode is a light-transmitting area;
the area corresponding to the sub-pixel area of the touch electrode has an opening;
an orthographic projection of the touch electrode on the base substrate is in the shape of a ring, and an orthographic projection of the sub-pixel area corresponding to the touch electrode on the base substrate is within the ring.

2. The display substrate according to claim 1 , wherein the touch electrode is in the shape of a ring.

3. The display substrate according to claim 1 , wherein an inner ring and an outer ring of the ring are both rectangular.

4. The display substrate according to claim 1 , wherein
the touch structure comprises a plurality of emitting electrode groups and a plurality of receiving electrode groups, wherein the plurality of receiving electrode groups is arranged in an array along a first direction, and the plurality of emitting electrode groups is arranged in an array along a second direction, wherein
the emitting electrode group comprises a plurality of emitting electrodes and a first connecting line connecting the plurality of emitting electrodes, the plurality of emitting electrodes being arranged in an array along the first direction; and
the receiving electrode group comprises a plurality of receiving electrodes and a second connecting line connecting the plurality of receiving electrodes, the plurality of receiving electrodes being arranged in an array along the second direction, wherein
the emitting electrode and the receiving electrode are both touch electrodes; the first connecting line and the second connecting line intersect; and an orthographic projection of the emitting electrode on the base substrate is not overlapped with an orthographic projection of the receiving electrode on the base substrate.

5. The display substrate according to claim 4 , wherein
the pixel defining layer has a plurality of grooves, and the emitting electrode and the receiving electrode are disposed in different grooves.

6. The display substrate according to claim 4 , further comprising:
an insulating dielectric layer, disposed between the first connecting line and the second connecting line.

7. The display substrate according to claim 6 , wherein
at least a portion of the insulating dielectric layer is disposed in the groove in which the touch electrode is disposed.

8. The display substrate according to claim 1 , wherein
an opening of the groove is on a side of the pixel defining layer distal from the base substrate.

9. The display substrate according to claim 1 , wherein
a depth of the groove is greater than or equal to a maximum thickness of the touch structure, wherein the depth is a dimension of the groove in a direction perpendicular to the base substrate, and a thickness of the touch structure is a dimension of the touch structure in the direction perpendicular to the base substrate.

10. The display substrate according to claim 1 , wherein
an opening of the groove has a width of 15 to 30 μm.

11. The display substrate according to claim 1 , further comprising:
a light-emitting unit, disposed in the sub-pixel area; and
an encapsulating structure, disposed on a side of the light-emitting unit distal from the base substrate, wherein the encapsulating structure comprises a first inorganic sub-layer, an organic sub-layer and a second inorganic sub-layer laminated in a direction going away from the base substrate, and the touch structure is disposed between the first inorganic sub-layer and the organic sub-layer.

12. The display substrate according to claim 11 , wherein
at least a portion of the first inorganic sub-layer is in contact with at least a portion of the organic sub-layer.

13. The display substrate according to claim 1 , further comprising:
a back plate circuit layer, disposed between the pixel defining layer and the base substrate.

14. The display substrate according to claim 1 , wherein
the display substrate is a flexible display substrate.

15. The display substrate according to claim 1 , wherein
the display substrate is a flexible display substrate; the touch electrode is in the shape of a ring; an inner ring and an outer ring of the ring being both rectangular; the touch structure comprises a plurality of emitting electrode groups and a plurality of receiving electrode groups, the plurality of receiving electrode groups being arranged in an array along a first direction and the plurality of emitting electrode groups being arranged in an array along a second direction, wherein the emitting electrode group comprises a plurality of emitting electrodes and a first connecting line connecting the plurality of emitting electrodes, the plurality of emitting electrodes being arranged in an array along the first direction; and the receiving electrode group comprises a plurality of receiving electrodes and a second connecting line connecting the plurality of receiving electrodes, the plurality of receiving electrodes being arranged in an array along the second direction, wherein the emitting electrode and the receiving electrode are both touch electrodes; the first connecting line and the second connecting line intersect; and the emitting electrode and the receiving electrode are disposed in different grooves, an opening of the groove is on a side of the pixel defining layer distal from the base substrate, a depth of the groove is greater than or equal to a maximum thickness of the touch structure, wherein the depth is a dimension of the groove in a direction perpendicular to the base substrate, and a thickness of the touch structure is a dimension of the touch structure in the direction perpendicular to the base substrate; and the opening of the groove has a width of 15 to 30 μm;
the display substrate further comprises:
an insulating dielectric layer, disposed between the first connecting line and the second connecting line, wherein at least a portion of the insulating dielectric layer is disposed in the groove in which the touch electrode is disposed;
a light-emitting unit, disposed in the sub-pixel area;
an encapsulating structure, disposed on a side of the light-emitting unit distal from the base substrate, wherein the encapsulating structure comprises a first inorganic sub-layer, an organic sub-layer and a second inorganic sub-layer laminated in a direction going away from the base substrate, the touch structure is disposed between the first inorganic sub-layer and the organic sub-layer, and at least a portion of the first inorganic sub-layer is in contact with at least a portion of the organic sub-layer; and
a back plate circuit layer, disposed between the pixel defining layer and the base substrate.

16. A method for manufacturing a display substrate, comprising:
forming a pixel defining layer on a base substrate, wherein the pixel defining layer defines a plurality of sub-pixel areas;
forming a groove in the pixel defining layer; and
forming a touch structure in the groove, wherein the touch structure is configured to provide a touch function; wherein
the touch struc

Assignees

• Chengdu Boe Optoelect Tech Co
• Boe Technology Group Co Ltd

Inventors

• Yu Zhaowei
• Wei Qinhe
• Yan Rongjian
• Chen Wenbin

Classifications

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K50/84

  Passivation; Containers; Encapsulations · CPC title

• H10K59/873

  Encapsulations · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• H10K59/122

  Pixel-defining structures or layers, e.g. banks · CPC title