Display substrate and manufacturing method thereof, and display device

Patent metadata

Field	Value
Publication number	US-12238983-B2
Application number	US-201916958821-A
Country	US
Kind code	B2
Filing date	Aug 27, 2019
Priority date	Aug 27, 2019
Publication date	Feb 25, 2025
Grant date	Feb 25, 2025

Abstract

A display substrate and a manufacturing method and a display device are provided. The display substrate includes: a first electrode pattern, a connecting electrode pattern, a second electrode, a light-emitting functional layer and a first dummy electrode pattern. The first electrode pattern is includes a plurality of first electrodes spaced apart from each other. The second electrode is connected with the connecting electrode pattern, the second electrode and the first electrode pattern are spaced apart from each other. The first dummy electrode pattern includes a plurality of first dummy electrodes; the connecting electrode pattern surrounds the first electrode pattern, the first dummy electrode pattern is located between the connecting electrode pattern and the first electrode pattern, and at least two of the plurality of first dummy electrodes are each of a block shape and are spaced apart from each other.

First claim

What is claimed is:

1. A display substrate, comprising:
a first electrode pattern, located in a display region of the display substrate and comprising a plurality of first electrodes spaced apart from each other, each of the plurality of first electrodes being configured to receive a pixel driving signal;
a connecting electrode pattern, located in a peripheral region of the display substrate;
a second electrode, located in the display region and the peripheral region, connected with and in direct contact with the connecting electrode pattern, the second electrode and the first electrode pattern being spaced apart from each other, the second electrode being configured to receive a first power signal;
a light-emitting functional layer, located between the first electrode pattern and the second electrode; and
a first dummy electrode pattern, comprising a plurality of first dummy electrodes, wherein the connecting electrode pattern surrounds the first electrode pattern, the first dummy electrode pattern is located between the connecting electrode pattern and the first electrode pattern, and at least two of the plurality of first dummy electrodes are each of a block shape and are spaced apart from each other, and
wherein a pattern density of the connecting electrode pattern is the same as that of the first electrode pattern, and a pattern density of the first dummy electrode pattern is the same as that of the first electrode pattern.

2. The display substrate according to claim 1 , further comprising a base substrate and a first insulation layer located on the base substrate, wherein the first electrode pattern, the connecting electrode pattern, and the first dummy electrode pattern are located at a side of the first insulation layer away from the base substrate, and are in contact with the first insulation layer, respectively.

3. The display substrate according to claim 2 , wherein a via hole is not provided in a portion of the first insulation layer which overlaps with the plurality of first dummy electrodes in a direction perpendicular to the base substrate.

4. The display substrate according to claim 2 , wherein a via hole is not provided in the first insulation layer for connecting the plurality of the first dummy electrodes to other components.

5. The display substrate according to claim 2 , wherein the connecting electrode pattern comprises a plurality of connecting electrodes, and each of the plurality of connecting electrodes is of a block shape.

6. The display substrate according to claim 5 , wherein a shape of the connecting electrode is the same as that of the first electrode, and a shape of the first dummy electrode is the same as that of the first electrode.

7. The display substrate according to claim 2 , further comprising a second dummy electrode pattern, wherein the second dummy electrode pattern comprises a plurality of second dummy electrodes; and the second dummy electrode pattern is located at a side of the connecting electrode pattern away from the first electrode pattern.

8. The display substrate according to claim 7 , wherein a via hole is not provided in a portion of the first insulation layer which overlaps with the plurality of second dummy electrodes in a direction perpendicular to the base substrate.

9. The display substrate according to claim 7 , wherein each of the plurality of second dummy electrodes is of a block shape, and a shape of the second dummy electrode is the same as that of the first electrode, wherein a pattern density of the second dummy electrode pattern is the same as that of the first electrode pattern.

10. The display substrate according to claim 2 , wherein at least one selected from the group consisting of a portion of the first insulation layer, located between adjacent first electrodes, and a portion of the first insulation layer, located between adjacent connecting electrodes, has a groove.

11. The display substrate according to claim 2 , further comprising an insulation filling layer, wherein the insulation filling layer covers the plurality of first dummy electrodes, the plurality of first dummy electrodes and the insulation filling layer constitute a first filling layer, the first electrode pattern comprises an edge first-electrode close to the connecting electrode pattern, and the insulation filling layer is in contact with the connecting electrode pattern and the edge first-electrode, respectively.

12. The display substrate according to claim 11 , wherein the second electrode is in contact with the insulation filling layer, wherein the edge first-electrode and the plurality of first dummy electrodes are insulated from each other.

13. The display substrate according to claim 11 , further comprising a pixel defining layer, wherein the pixel defining layer comprises a plurality of pixel defining portions, and each of the plurality of pixel defining portions is located between adjacent first electrodes, wherein the insulation filling layer and the pixel defining layer are located in the same layer.

14. The display substrate according to claim 11 , further comprising a second filling layer, wherein the second filling layer comprises at least one second filling portion, and the second filling portion is located between adjacent connecting electrodes, wherein the second filling portion is in contact with the adjacent connecting electrodes, respectively, wherein the second filling layer comprises an insulation layer, wherein the second filling layer and the insulation filling layer are located in the same layer.

15. The display substrate according to claim 11 , wherein the light-emitting functional layer is in contact with the first filling layer.

16. The display substrate according to claim 1 , further comprising a sensor electrode pattern, wherein the sensor electrode pattern comprises a plurality of sensor electrodes; and each of the plurality of sensor electrodes is of a block shape, and the sensor electrode is configured to receive a detection driving signal, wherein a shape of the sensor electrode is the same as that of the first electrode, and a pattern density of the sensor electrode pattern is the same as that of the first electrode pattern.

17. The display substrate according to claim 16 , further comprising a third filling layer, wherein the third filling layer comprises a plurality of third filling portions, and each of the plurality of third filling portions is located between at least one selected from the group consisting of adjacent sensor electrodes, and adjacent sensor electrode and first dummy electrode.

18. A manufacturing method of a display substrate, comprising:
forming a first electrode pattern, the first electrode pattern being located in a display region of the display substrate and comprising a plurality of first electrodes spaced apart from each other, each of the plurality of first electrodes being configured to receive a pixel driving signal;
forming a connecting electrode pattern, the connecting electrode pattern being located in a peripheral region of the display substrate;
forming a second electrode, the second electrode being located in the display region and the peripheral region, connected with and in direct contact with the connecting electrode pattern, the second electrode and the first electrode pattern being spaced apart from each other, and the second electrode being configured to receive a first power signal;
forming a light-emitting functional layer, the light-emitting functional layer being located between the first electrode pattern and the second electrode; and
forming a fir

Assignees

• Boe Technology Group Co Ltd

Inventors

• Li Yunlong
• Lu Pengcheng
• Liu Li
• Ao Yu
• Tian Yuanlan
• Zhu Zhijian
• Zhang Dacheng

Classifications

• H10K59/873

  Encapsulations · CPC title

• H10K59/1201

  Manufacture or treatment · CPC title

• H10K59/88

  Dummy elements, i.e. elements having non-functional features · CPC title

• H10K71/00

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

• H10K50/844

  Encapsulations · CPC title