Method for preparing organic light-emitting display panel, organic light-emitting display panel, and display device

Patent metadata

Field	Value
Publication number	US-12588367-B2
Application number	US-202117921636-A
Country	US
Kind code	B2
Filing date	Aug 4, 2021
Priority date	Sep 24, 2020
Publication date	Mar 24, 2026
Grant date	Mar 24, 2026

Abstract

Provided are a method for preparing an organic light-emitting display panel, an organic light-emitting display panel, and a display device. The method comprises: forming a pixel defining layer on one side of a substrate; forming a pixel supporting layer on the side of the pixel defining layer away from the substrate, and causing the orthographic projection of the surface of the pixel supporting layer that faces the pixel defining layer on the substrate to be within the range of the orthographic projection of the side surface of the pixel supporting layer away from the pixel defining layer on the substrate; forming a light-emitting functional layer on the side of the pixel supporting layer away from the pixel defining layer; and removing the pixel supporting layer to obtain an organic light-emitting display panel.

First claim

The invention claimed is:

1 . A method for preparing an organic light-emitting display panel, comprising:
forming a pixel defining layer on a side of a substrate; forming a pixel supporting layer on a side of the pixel defining layer away from the substrate, wherein an orthographic projection of a surface of a side of the pixel supporting layer that faces the pixel defining layer on the substrate is within a range of an orthographic projection of a surface of a side of the pixel supporting layer away from the pixel defining layer on the substrate; forming a light-emitting functional layer on the side of the pixel supporting layer away from the pixel defining layer; and peeling off the pixel supporting layer to obtain the organic light-emitting display panel, wherein the pixel defining layer defines a plurality of sub-pixels on the substrate, wherein the light-emitting functional layer is provided with a disconnection slit at a gap between two adjacent sub-pixels of the plurality of sub-pixels, wherein the plurality of sub-pixels comprise a red sub-pixel, a green sub-pixel and a blue sub-pixel, and an orthographic projection of the disconnection slit on the substrate surrounds an area where the red sub-pixel is located, the orthographic projection of the disconnection slit on the substrate has a surrounding portion, a first connecting portion and a second connecting portion, the first connecting portion connects two surrounding portions that are adjacent in a first direction, the first connecting portion separates areas, where the green sub-pixel and the blue sub-pixel are located, in a second direction, the second connecting portion connects two surrounding portions that are adjacent in the second direction, and the second connecting portion separates areas, where the green sub-pixel and the blue sub-pixel are located, in the first direction, and all of the red sub-pixel, the green sub-pixel and the blue sub-pixel are hexagonal, the red sub-pixel, the green sub-pixel and the blue sub-pixel have different sizes from one another, the surrounding portion is hexagonal and surrounds the hexagonal red sub-pixel, and each of six sides of the hexagonal surrounding portion is parallel to a corresponding side of the hexagonal red sub-pixel, the first connecting portion is parallel to at least one side of the surrounding portion, and the second connecting portion is not parallel to any side of the surrounding portion.

2 . The method according to claim 1 , wherein
an orthographic projection of the pixel supporting layer on the substrate at least surrounds an area where the red sub-pixel is located.

3 . The method according to claim 2 , wherein the orthographic projection of the pixel supporting layer on the substrate separates areas where the red sub-pixel, the green sub-pixel and the blue sub-pixel are located from one another.

4 . The method according to claim 1 , wherein the pixel supporting layer is formed of a negative photosensitive material comprising a fluoroether material, and the peeling off the pixel supporting layer comprises:
placing the substrate comprising the pixel defining layer, the pixel supporting layer and the light-emitting functional layer in a peeling liquid, wherein a material for forming the peeling liquid comprises a fluoroether material.

5 . The method according to claim 1 , wherein the light-emitting functional layer is a hole injection layer, a hole transport layer, an electron barrier layer, an organic light-emitting layer, a hole barrier layer and an electron transport layer, and after peeling off the pixel defining layer, the method further comprises:
forming an electron injection layer on a side of the electron transport layer away from the hole barrier layer.

6 . The method according to claim 1 , wherein the light-emitting functional layer is a hole injection layer and a hole transport layer, and after peeling off the pixel supporting layer, the method further comprises:
forming an electron barrier layer on a side of the hole transport layer away from the hole injection layer; forming an organic light-emitting layer on a side of the electron barrier layer away from the hole transport layer; forming a hole barrier layer on a side of the organic light-emitting layer away from the electron barrier layer; forming an electron transport layer on a side of the hole barrier layer away from the organic light-emitting layer; and forming an electron injection layer on a side of the electron transport layer away from the hole barrier layer.

7 . The method according to claim 1 , wherein the light-emitting functional layer is a hole injection layer, a hole transport layer, an electron barrier layer and an organic light-emitting layer, and after peeling off the pixel defining layer, the method further comprises:
forming a hole barrier layer on a side of the organic light-emitting layer away from the electron barrier layer; forming an electron transport layer on a side of the hole barrier layer away from the organic light-emitting layer; and forming an electron injection layer on a side of the electron transport layer away from the hole barrier layer.

8 . The method according to claim 1 , wherein the light-emitting functional layer is a hole injection layer, a hole transport layer, an electron barrier layer, an organic light-emitting layer and a hole barrier layer, and after peeling off the pixel defining layer, the method further comprises:
forming an electron transport layer on a side of the hole barrier layer away from the organic light-emitting layer; and forming an electron injection layer on a side of the electron transport layer away from the hole barrier layer.

9 . The method according to claim 4 , wherein the pixel supporting layer has a thickness of 1 to 2 microns.

10 . The method according to claim 9 , wherein a width of the pixel supporting layer is less than a width of a gap between two adjacent sub-pixels.

11 . The method according to claim 9 , wherein the pixel supporting layer has a width of 2 to 20 microns.

12 . An organic light-emitting display panel, comprising:
a substrate; a pixel defining layer, defining a plurality of sub-pixels on the substrate; and a light-emitting functional layer, located on a side of the pixel defining layer away from the substrate, wherein the light-emitting functional layer is provided with a disconnection slit at a gap between two adjacent sub-pixels, wherein the sub-pixels comprise a red sub-pixel, a green sub-pixel and a blue sub-pixel, and an orthographic projection of the disconnection slit on the substrate surrounds an area where the red sub-pixel is located, the orthographic projection of the disconnection slit on the substrate has a surrounding portion, a first connecting portion and a second connecting portion, the first connecting portion connects two surrounding portions that are adjacent in a first direction, the first connecting portion separates areas, where the green sub-pixel and the blue sub-pixel are located, in a second direction, the second connecting portion connects two surrounding portions that are adjacent in the second direction, and the second connecting portion separates areas, where the green sub-pixel and the blue sub-pixel are located, in the first direction, and all of the red sub-pixel, the green sub-pixel and the blue sub-pixel are hexagonal, the red sub-pixel, the green sub-pixel and the blue sub-pixel have different sizes from one another, the surrounding portion is hexagonal and surrounds the hexagonal red sub-pixel, and each of six sides of the hexagonal surrounding portion is parallel to a corresponding side of the hexagonal red sub

Assignees

• Boe Technology Group Co Ltd

Inventors

• Hao Yanjun
• Qu Caiyu
• Du Xiaobo
• Li Yansong

Classifications

• H10K59/352

  the areas of the RGB subpixels being different · CPC title

• H10K59/1201

  Manufacture or treatment · CPC title

• H10K71/166

  using selective deposition, e.g. using a mask · CPC title

• H10K59/35

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

• H10K50/86

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title