Display substrate and display device

Patent metadata

Field	Value
Publication number	US-12446449-B2
Application number	US-202418645891-A
Country	US
Kind code	B2
Filing date	Apr 25, 2024
Priority date	May 27, 2020
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

A display substrate is provided, including: a base substrate including at least pixel and hole areas; sub-pixels arranged on the base substrate and in the pixel area; a hole in the hole area; a first barrier dam between the sub-pixels and the hole and at least partially surrounding the hole; a functional film layer, an organic material layer and an encapsulating structure sequentially arranged on the display substrate in a direction away from the base substrate, an orthographic projection of the organic material layer on the base substrate falling within the pixel area, the organic material layer including at least one film layer; and a filling structure, at least a portion of which is arranged between the hole and the first barrier dam. The filling structure and the at least one film layer of the organic material layer are in the same layer and include the same material.

First claim

What is claimed is:

1. A display substrate, comprising:
a base substrate comprising at least a pixel area and a hole area;
a plurality of sub-pixels on the base substrate, wherein the plurality of sub-pixels are located in the pixel area;
a hole in the hole area;
a first barrier dam arranged between the sub-pixels and the hole and at least partially surrounding the hole;
a functional film layer arranged on the base substrate;
an organic material layer arranged on a side of the functional film layer away from the base substrate, wherein an orthographic projection of the organic material layer on the base substrate falls within the pixel area, and the organic material layer comprises at least one film layer;
an encapsulating structure arranged on a side of the organic material layer away from the base substrate; and
a filling structure, wherein at least a portion of the filling structure is arranged between the hole and the first barrier dam,
wherein the filling structure and the at least one film layer of the organic material layer are located in the same layer and comprise the same material.

2. The display substrate according to claim 1 , wherein the filling structure comprises a single filling film layer, and the organic material layer comprises a planarization layer; and
the single filling film layer and the planarization layer are located in the same layer and comprise the same material.

3. The display substrate according to claim 1 , wherein the filling structure comprises a first filling film layer and a second filling film layer, and the organic material layer comprises a planarization layer and a pixel defining layer;
the first filling film layer and the planarization layer are located in the same layer and comprise the same material; and
the second filling film layer and the pixel defining layer are located in the same layer and comprise the same material.

4. The display substrate according to claim 1 , wherein the display substrate comprises a plurality of first barrier dams, and an orthographic projection of one of the plurality of first barrier dams closest to the hole on the base substrate does not overlap an orthographic projection of the filling structure on the base substrate.

5. The display substrate according to claim 1 , wherein the display substrate comprises a plurality of first barrier dams, and an orthographic projection of one of the plurality of first barrier dams closest to the hole on the base substrate partially overlaps an orthographic projection of the filling structure on the base substrate.

6. The display substrate according to claim 1 , wherein the display substrate comprises a plurality of first barrier dams, and an orthographic projection of the filling structure on the base substrate covers an orthographic projection of one of the plurality of first barrier dams closest to the hole on the base substrate.

7. The display substrate according to claim 1 , wherein the filling structure is disconnected from the organic material layer in a radial direction of the hole.

8. The display substrate according to claim 1 , further comprising a second barrier dam arranged on a side of the first barrier dam away from the hole,
wherein an orthographic projection of the first barrier dam on the base substrate has a width smaller than that of an orthographic projection of the second barrier dam on the base substrate.

9. The display substrate according to claim 1 , wherein a material of the organic material layer comprises at least one selected from polymethylmethacrylate, polycarbonate, polystyrene, epoxy resin, polyimide and polyethylene.

10. A display device comprising the display substrate according to claim 1 .

11. The display substrate according to claim 1 , further comprising a functional film layer arranged on a side of the organic material layer close to the base substrate, wherein the functional film layer comprises:
a first conductive layer on the base substrate;
a gate insulating layer on a side of the first conductive layer away from the base substrate;
a second conductive layer on a side of the gate insulating layer away from the base substrate;
an interlayer dielectric layer on a side of the second conductive layer away from the base substrate; and
a third conductive layer on a side of the interlayer dielectric layer away from the base substrate.

12. The display substrate according to claim 11 , wherein the first barrier dam comprises a stacked layer structure, the stacked layer structure comprising portions which are respectively located in the first conductive layer, the gate insulating layer, the second conductive layer, the interlayer dielectric layer and the third conductive layer.

13. The display substrate according to claim 12 , wherein a cross section of the first barrier dam in a radial direction of the hole is trapezoidal;
an orthographic projection of a portion of the third conductive layer forming the first barrier dam on the base substrate falls within an orthographic projection of a portion of the interlayer dielectric layer forming the first barrier dam on the base substrate; and
an orthographic projection of a portion of the second conductive layer forming the first barrier dam on the base substrate falls within an orthographic projection of a portion of the gate insulating layer forming the first barrier dam on the base substrate.

14. The display substrate according to claim 13 , wherein the orthographic projection of the filling structure on the base substrate partially overlaps the orthographic projection of the first barrier dam on the base substrate, and an area of an overlapping portion is ⅖˜⅗ of an area of the orthographic projection of the first barrier dam on the base substrate.

15. The display substrate according to claim 1 , further comprising a second barrier dam, a third barrier dam and a fourth barrier dam arranged between the sub-pixels and the first barrier dam, wherein the first barrier dam, the second barrier dam, the third barrier dam and the fourth barrier dam are sequentially arranged in a direction directed from the hole to the sub-pixels.

16. The display substrate according to claim 15 , wherein the functional film layer comprises:
a barrier layer on the base substrate;
a buffer layer on a side of the barrier layer away from the base substrate;
a first gate insulating layer on a side of the buffer layer away from the base substrate;
a first conductive layer on a side of the first gate insulating layer away from the base substrate;
a second gate insulating layer on a side of the first conductive layer away from the base substrate;
a second conductive layer on a side of the second gate insulating layer away from the base substrate;
an interlayer dielectric layer on a side of the second conductive layer away from the base substrate; and
a third conductive layer on a side of the interlayer dielectric layer away from the base substrate.

17. The display substrate according to claim 16 , wherein the first barrier dam comprises at least a stacked layer structure, the stacked layer structure comprising portions which are respectively located in the barrier layer, the buffer layer and the third conductive layer.

18. The display substrate according to claim 16 , wherein the second barrier dam comprises at least a stacked layer structure, the stacked layer structure comprising portions which are respectively located in the planarization layer and the pixel defining layer.

19. The display substrate according to claim 16 , wherein the third barrier

Assignees

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

Inventors

• Zhang Xin
• He Yupeng
• Zhou Yang
• Wang Wei
• Jiang Xiaofeng
• Wang Yu
• Yang Lulu
• Zhang Yiyang
• Yang Guanghui
• Lu Jiaming
• Hao Rui
• Ma Qun
• Liu Pu
• Zhu Liudong
• Huang Qiang
• He Bin
• Duan Dinan
• Bai Haiyong
• Li Xin
• Wei Ruiqi

Classifications

• H10K50/844

  Encapsulations · CPC title

• H10K71/00

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

• H10K59/65

  OLEDs integrated with inorganic image sensors · CPC title

• H10K59/873

  Encapsulations · CPC title

• H10K77/111

  Flexible substrates · CPC title