Display panel and preparation method therefor, and display device

Patent metadata

Field	Value
Publication number	US-12538644-B2
Application number	US-202117638845-A
Country	US
Kind code	B2
Filing date	Mar 10, 2021
Priority date	Apr 24, 2020
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

A display panel and manufacturing method therefor and a display device are provided. The display panel includes: a base substrate; an insulation layer arranged at a peripheral area of the base substrate; at least one encapsulation dam arranged on a surface of the insulation layer away from the base substrate, the encapsulation dam being located in the peripheral area of the base substrate and being arranged around the display area; and at least one groove disposed in the insulation layer, a projection of the at least one groove on the base substrate being located within on a projection of the encapsulation dam on the base substrate.

First claim

What is claimed is:

1 . A display panel, comprising:
a base substrate comprising a display area and a peripheral area surrounding the display area; an insulation layer covering at least the peripheral area of the base substrate; a plurality of encapsulation dams located on a surface of the insulation layer away from the base substrate, the plurality of encapsulation dams being located in the peripheral area of the base substrate and being arranged around the display area, wherein the plurality of encapsulation dams comprise a first encapsulation dam and a second encapsulation dam, and the second encapsulation dam is higher than the first encapsulation dam and is arranged around a side of the first encapsulation dam away from the display area; and at least one groove formed in the insulation layer, the groove being arranged around the display area, wherein a projection of the at least one groove on the base substrate is located within a projection of at least one encapsulation dam of the first encapsulation dam and the second encapsulation dam on the base substrate, wherein a material of the at least one encapsulation dam is filled in the groove, and wherein the display panel further comprises a pixel definition layer formed in the display area, wherein each of the first encapsulation dam and the second encapsulation dam comprises a first barrier layer, and the first barrier layer and the pixel definition layer are formed of a same material and provided in a same layer.

2 . The display panel according to claim 1 , wherein the projection of the groove on the base substrate is located within a projection of the second encapsulation dam on the base substrate.

3 . The display panel according to claim 1 , further comprising:
a crack detection line located in the peripheral area of the base substrate and arranged around the display area, wherein a projection of the crack detection line on the base substrate is located between projections of the first encapsulation dam and the second encapsulation dam on the base substrate, and the first encapsulation dam and the second encapsulation dam being adjacent to each other.

4 . The display panel according to claim 1 , further comprising:
a crack detection line located in the peripheral area of the base substrate and arranged around the display area, wherein a projection of the crack detection line on the base substrate is located within a projection of at least one encapsulation dam of the plurality of encapsulation dams on the base substrate.

5 . The display panel according to claim 4 , wherein the insulation layer covers the crack detection line, and in a covering area by the projection of the at least one encapsulation dam of the plurality of encapsulation dams, the crack detection line is located at a side of the groove near to or far from the display area.

6 . The display panel according to claim 4 , wherein the crack detection line is located on the surface of the insulation layer away from the base substrate, and the crack detection line is located between two adjacent grooves.

7 . The display panel according to claim 6 , wherein the display panel comprises a plurality of crack detection lines, and projections of the plurality of crack detection lines on the base substrate are located within a projection of the first encapsulation dam or the second encapsulation dam on the base substrate or distributed within projections of the plurality of encapsulation dams on the base substrate.

8 . The display panel according to claim 1 , wherein the insulation layer has a single-layer structure, and the groove is formed in the single-layer structure; or
the insulation layer has a multi-layer structure, the groove penetrates through at least one layer of the multi-layer structure, and a bottom surface of the groove is located in a layer of the multi-layer structure closest to the base substrate.

9 . The display panel according to claim 1 , further comprising a planarization layer formed in the display area,
wherein the second encapsulation dam further comprises a second barrier layer disposed on a surface of the first barrier layer facing the base substrate, and the second barrier layer and the planarization layer are formed of a same material and provided in a same layer.

10 . A display device, comprising:
a display panel, wherein the display panel comprises:
a base substrate comprising a display area and a peripheral area surrounding the display area;
an insulation layer covering at least the peripheral area of the base substrate;
a plurality of encapsulation dams located on a surface of the insulation layer away from the base substrate, the plurality of encapsulation dams being located in the peripheral area of the base substrate and being arranged around the display area, wherein the plurality of encapsulation dams comprise a first encapsulation dam and a second encapsulation dam, and the second encapsulation dam is higher than the first encapsulation dam and is arranged around a side of the first encapsulation dam away from the display area; and
at least one groove formed in the insulation layer, the groove being arranged around the display area, wherein a projection of the at least one groove on the base substrate is located within a projection of at least one encapsulation dam of the first encapsulation dam and the second encapsulation dam on the base substrate,
wherein a material of the at least one encapsulation dam is filled in the groove, and
wherein the display panel further comprises a pixel definition layer formed in the display area, wherein each of the first encapsulation dam and the second encapsulation dam comprises a first barrier layer, and the first barrier layer and the pixel definition layer are formed of a same material and provided in a same layer.

11 . The display device according to claim 10 , wherein the projection of the groove on the base substrate is located within a projection of the second encapsulation dam on the base substrate.

12 . The display device according to claim 10 , wherein the display panel further comprises:
a crack detection line located in the peripheral area of the base substrate and arranged around the display area, wherein a projection of the crack detection line on the base substrate is located between projections of the first encapsulation dam and the second encapsulation dam on the base substrate, and the first encapsulation dam and the second encapsulation dam being adjacent to each other.

13 . The display device according to claim 10 , wherein the display panel further comprises:
a crack detection line located in the peripheral area of the substrate and arranged around the display area, wherein a projection of the crack detection line on the base substrate is located within a projection of at least one encapsulation dam of the plurality of encapsulation dams on the base substrate.

14 . The display device according to claim 13 , wherein the insulation layer covers the crack detection line and, in a covering area by the at least one encapsulation dam of the plurality of encapsulation dams, the crack detection line is located at a side of the groove near to or far from the display area.

15 . A method for manufacturing a display panel, comprising:
providing a base substrate comprising a display area and a peripheral area surrounding the display area being divided; forming an insulation layer covering at least the peripheral area of the base substrate; forming a plurality of encapsulation dams located on a surface of the insulation layer away from the base substrate so that the plurality

Assignees

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

Inventors

• Guo Xiaoliang
• Zhang Tiaomei
• Dong Zhongfei
• Hu Yan
• Yuan Hongguang
• Sun Jiamian

Classifications

• H10K59/1201

  Manufacture or treatment · CPC title

• H10K59/88

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

• H10K50/8426 Primary

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title

• H10K71/00

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

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title