Display panel with isolation spacer including groove-shaped structure, fabrication method therefor, and display apparatus

Patent metadata

Field	Value
Publication number	US-12501767-B2
Application number	US-202117628788-A
Country	US
Kind code	B2
Filing date	Mar 9, 2021
Priority date	Apr 29, 2020
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

A display panel having a hole running through the display panel includes: a base substrate; a plurality of light-emitting devices, organic light-emitting functional layers of the light-emitting devices extending to an edge region; an isolation spacer located on the base substrate within the edge region and which are annular structures that surround the hole, the organic light-emitting functional layers are interrupted at the isolation spacer; and an encapsulation layer covering the plurality of light-emitting devices. An inorganic layer in the encapsulation layer extends to the edge region and covers the isolation spacer and the organic light-emitting functional layers. The isolation spacer includes: an inner layer structure and an outer layer structure. The side of the inner layer structure away from the base substrate is provided with a groove-shaped structure, and the outer layer structure includes a through hole.

First claim

What is claimed is:

1 . A display panel, comprising: a hole running through the display panel; wherein the display panel has a display region and an edge region surrounding the hole; wherein the display panel further comprises:
a base substrate; a plurality of light-emitting devices, disposed on the base substrate in the display region; wherein organic light-emitting functional layers of the plurality of light-emitting devices extend to the edge region; an isolation spacer, disposed on the base substrate in the edge region; wherein the isolation spacer is of a ring structure surrounding the hole, and the organic light-emitting functional layers extending to the edge region are interrupted at a position of the isolation spacer; an encapsulation layer, covering the plurality of light-emitting devices; wherein an inorganic layer in the encapsulation layer extends to the edge region and covers the isolation spacer and the organic light-emitting functional layers;
the isolation spacer comprises: an inner layer structure and an outer layer structure covering the inner layer structure;
wherein a groove-shaped structure is arranged on a side of the inner layer structure facing away from the base substrate, and the outer layer structure comprises a through hole running through the outer layer structure; and a cross sectional area of the through hole on a plane parallel to the base substrate is smaller than a maximum inside cross sectional area of the groove-shaped structure on a plane parallel to the base substrate, and an orthographic projection of the through hole on the base substrate is within a range of an orthographic projection of an opening of the groove-shaped structure on the base substrate;
and an inorganic film layer, disposed on a side of the isolation spacer close to the base substrate, wherein the inorganic film layer is in direct contact with the isolation spacer; and the inorganic film layer is provided with an annular groove at a side of the isolation spacer close to the hole and/or at a side of the isolation spacer away from the hole.

2 . The display panel according to claim 1 , wherein along a first direction, a sectional area of the groove-shaped structure in a second direction increases firstly and then decreases; and
the first direction is a direction in which the base substrate points to the isolation spacer, and the second direction is a direction parallel to the base substrate.

3 . The display panel according to claim 1 , wherein along a first direction, a sectional area of the isolation spacer in a second direction increases; and
the first direction is a direction in which the base substrate points to the isolation spacer, and the second direction is a direction parallel to the base substrate.

4 . The display panel according to claim 1 , wherein a certain distance is formed between the isolation spacer and the annular groove located at the side of the isolation spacer.

5 . The display panel according to claim 1 , further comprising: a retaining dam, disposed on the base substrate in the edge region; wherein
the retaining dam is of a ring structure surrounding the hole; and the inorganic layer in the encapsulation layer covers the retaining dam.

6 . The display panel according to claim 5 , wherein a quantity of isolation spacers is greater than or equal to 2; and
the isolation spacers are disposed at a side of the retaining dam close to the hole and a side of the retaining dam away from the hole respectively.

7 . A display apparatus, comprising the display panel according to claim 1 .

8 . A fabrication method of the display panel according to claim 1 , comprising:
forming the isolation spacer on the base substrate in the edge region; forming the plurality of light-emitting devices on the base substrate in the display region; wherein organic light-emitting functional layers in the light-emitting devices are interrupted at a position of the isolation spacer; forming the encapsulation layer covering the light-emitting devices and the isolation spacer; and forming the hole by cutting the display panel;
wherein the forming the isolation spacer on the base substrate in the edge region, comprises:
forming the inner layer structure on the base substrate by using an organic material;
forming the outer layer structure covering the inner layer structure by using an inorganic material;
etching the outer layer structure by using a reaction gas corresponding to the inorganic material so as to form a through hole running through the outer layer structure; and
etching the inner layer structure by using a reaction gas corresponding to the organic material so as to form a groove-shaped structure on a side of the inner layer structure facing away from the base substrate;

wherein the forming the inner layer structure on the base substrate by using the organic material, comprises:
forming an inorganic film layer on the base substrate, and forming an organic material layer on the inorganic film layer;
forming a photoresist layer on the organic material layer, and photoetching the photoresist layer by adopting a halftone mask to form a photoresist complete retention region, a photoresist partial retention region and a photoresist complete removal region in the photoresist layer;
performing a first etching on the organic material layer, and removing the organic material layer in the photoresist complete removal region;
etching the inorganic film layer, removing part of the inorganic film layer in the photoresist complete removal region to form a groove located in the inorganic film layer, and removing the photoresist layer in the photoresist partial retention region;
performing a second etching on the organic material layer, and removing the organic material layer in the photoresist partial retention region; and
removing the photoresist layer in the photoresist complete retention region.

9 . The display apparatus according to claim 7 , wherein along a first direction, a sectional area of the groove-shaped structure in a second direction increases firstly and then decreases; and
the first direction is a direction in which the base substrate points to the isolation spacer, and the second direction is a direction parallel to the base substrate.

10 . The display apparatus according to claim 7 , wherein along a first direction, a sectional area of the isolation spacer in a second direction increases; and
the first direction is a direction in which the base substrate points to the isolation spacer, and the second direction is a direction parallel to the base substrate.

11 . The display apparatus according to claim 7 , further comprising: an inorganic film layer, disposed on a side of the isolation spacer close to the base substrate, wherein
the inorganic film layer is provided with an annular groove at a side of the isolation spacer close to the hole and/or at a side of the isolation spacer away from the hole.

12 . The display apparatus according to claim 11 , wherein a certain distance is formed between the isolation spacer and the annular groove located at the side of the isolation spacer.

13 . The display apparatus according to claim 7 , further comprising: a retaining dam, disposed on the base substrate in the edge region; wherein
the retaining dam is of a ring structure surrounding the hole; and the inorganic layer in the encapsulation layer covers the retaining dam.

14 . The display apparatus according to claim 13 , wherein a quantity of isolation spacers is greater than or equal to 2; and
the isolation spacers are disposed at a side of the retaining d

Assignees

• Chongqing Boe Display Tech Co Ltd
• Boe Technology Group Co Ltd
• Beijing Boe Technology Dev Co Ltd

Inventors

• Xu Yanyan
• Wu Xinwei
• Zhang Wei
• Li Cunzhi
• Shi Dawei
• Zhao Dongsheng
• Kwak Jonguk
• Sun Shicheng

Classifications

• H10K71/00

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

• H10K59/35

  comprising red-green-blue [RGB] subpixels · CPC title

• H10K59/10

  OLED displays · CPC title

• H10K59/65

  OLEDs integrated with inorganic image sensors · CPC title

• H10K59/00

  Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00 · CPC title