Display substrate, manufacturing method thereof, and display device

Patent metadata

Field	Value
Publication number	US-12004367-B2
Application number	US-202017271490-A
Country	US
Kind code	B2
Filing date	Jun 30, 2020
Priority date	May 27, 2020
Publication date	Jun 4, 2024
Grant date	Jun 4, 2024

Abstract

A display substrate, a manufacturing method thereof, and a display device are provided. The display substrate includes: a base substrate at least including a pixel area and a hole area; a plurality of sub-pixels arranged on the base substrate and 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; an organic material layer including at least one film layer, wherein an orthographic projection of the organic material layer on the base substrate falls within the pixel area; and a filling structure, wherein at least a portion of the filling structure is arranged between the hole and the first barrier dam, and the filling structure and the at least one film layer of the organic material layer are located in the same layer and include the same material.

First claim

What is claimed is:

1. A display substrate, comprising:
a base substrate at least comprising 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 second barrier dam on a side of the first barrier dam away from the hole;
an organic material layer comprising at least one film layer, wherein an orthographic projection of the organic material layer on the base substrate falls within the pixel area;
a filling structure, wherein at least a portion of the filling structure is arranged between the hole and the first barrier dam; and
a functional film layer arranged on a side of the organic material layer close to the base substrate,
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;
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;
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;
a third conductive layer on a side of the interlayer dielectric layer away from the base substrate; and
a passivation layer on a side of the third conductive layer away from the base substrate; and

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, the third conductive layer and the passivation layer; and the passivation layer comprises a first portion located in the first barrier dam, the third conductive layer comprises a first portion located in the first barrier dam, and an orthographic projection of the first portion of the passivation layer on the base substrate falls within an orthographic projection of the first portion of the third conductive layer on the base substrate.

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 filling structure comprises a first filling portion and a second filling portion that is closer to the first barrier dam than the first filling portion;
the first filling portion comprises a first surface away from the base substrate, and the second filling portion comprises a second surface away from the base substrate; and
a vertical distance between the first surface and the base substrate is greater than a vertical distance between the second surface and the base substrate.

5. The display substrate according to claim 1 , wherein a cross section of each of the first barrier dam and the second barrier dam is trapezoidal, the cross section is perpendicular to a surface of the base substrate where the first barrier dam and the second barrier dam are arranged, and the cross section extends in a first direction directed from the hole area to the pixel area; and
wherein a smallest dimension of a width of the first barrier dam is ¼˜⅜ of that of the second barrier dam, and a largest dimension of the width of the first barrier dam is 3/10˜⅖ of that of the second barrier dam.

6. 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; and/or,
wherein the base substrate is a flexible base substrate, and the display substrate further comprises a back film arranged on a surface of the base substrate away from the organic material layer.

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

8. 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; or,
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; or,
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.

9. The display substrate according to claim 8 , wherein an orthographic projection of the filling structure on the base substrate covers the orthographic projection of the first portion of the passivation layer on the base substrate.

10. The display substrate according to claim 1 , wherein orthographic projections of first barrier dams other than the first barrier dam closest to the hole on the base substrate are spaced apart from the orthographic projection of the filling structure on the base substrate.

11. The display substrate according to claim 10 , 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.

12. The display substrate according to claim 11 , wherein the first barrier dam comprises a top surface away from the base substrate and a side surface facing the hole, the passivation layer partially covers the top surface of the first barrier dam, and the passivation layer covers the side surface of the first barrier dam.

13. The display substrate according to claim 12 , wherein an area of an orthographic projection of a portion of the passivation layer covering the top surface of the first barrier dam on the base substrate is 3/10˜ 7/10 of an area of the orthographic projection of the first portion of the third conductive layer on the base substrate.

14. The display substrate according to claim 1 , further comprising a third barrier dam on a side of the second barrier dam away from the hole, wherein an orthographic projection of the third barrier dam on the base substrate has a width greater than that of the orthograph

Assignees

• Chengdu Boe Optoelect Tech Co
• Boe Technology Group 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 Primary

  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

• H10K59/88 Primary

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