Display panel, manufacturing method thereof and display apparatus

Patent metadata

Field	Value
Publication number	US-12336389-B2
Application number	US-202017418156-A
Country	US
Kind code	B2
Filing date	Dec 29, 2020
Priority date	Mar 2, 2020
Publication date	Jun 17, 2025
Grant date	Jun 17, 2025

Abstract

A display panel, a manufacturing method thereof and a display apparatus are provided. The display panel includes: a base substrate ( 10 ); a plurality of pixel units (P) are arranged on the base substrate ( 10 ); a pixel defining layer ( 11 ), located on the base substrate ( 10 ); the pixel defining layer ( 11 ) includes: a plurality of openings (U) located in all the pixel units (P) respectively, and a plurality of communicating grooves (T); and the openings corresponding to the two pixel units with the same color are connected through the communicating grooves (T).

First claim

What is claimed is:

1. A display panel, comprising:
a base substrate, wherein a plurality of pixel units are arranged on the base substrate in an array; and
a pixel defining layer, located on the base substrate, wherein the pixel defining layer comprises: a plurality of openings and at least one communicating groove, and the plurality of openings are located in the pixel units respectively;
wherein the plurality of pixel units are arranged in a first direction and a second direction in the array, and the first direction and the second direction are arranged perpendicular to each other; two adjacent pixel units in the first direction display different colors, and two adjacent pixel units in the second direction display different colors;
two adjacent pixel units in a third direction display same color; and the third direction is different from the first direction and the second direction; and
the communicating groove is configured to connect the openings corresponding to two pixel units with same color;
wherein the display panel further comprises: an organic light-emitting function layer located in the openings;
a surface of the organic light-emitting function layer facing away from the base substrate serves as a first surface, and a surface of the pixel defining layer close to the base substrate serves as a second surface; and
a distance between the first surface and the second surface is smaller than a distance between a bottom surface of the communicating groove and the second surface;
wherein the pixel defining layer comprises: a first pixel defining structure located on one side of a bottom surface of the communicating groove close to the base substrate, and a second pixel defining structure except for the first pixel defining structure; and
the second pixel defining structure is of an integrated structure;
a surface of the first pixel defining structure on a side facing away from the base substrate and a surface of the second pixel defining structure on a side proximate to the base substrate are not in a same plane.

2. The display panel according to claim 1 , wherein the openings are rectangular and comprise first edges extending in the first direction and second edges extending in the second direction, and a length of the first edges is larger than a length of the second edges; and
the communicating groove connects two first edges close to each other in two adjacent openings.

3. The display panel according to claim 2 , wherein a width of the communicating groove in the first direction is same as the length of the first edges in the first direction.

4. The display panel according to claim 1 , wherein the first pixel defining structure is composed of lyophilic materials; and
the second pixel defining structure is composed of lyophobic materials.

5. The display panel according to claim 4 , wherein materials of the first pixel defining structure comprise silicon dioxide, silicon nitride, silicon oxynitride, polymethyl methacrylate or polyimide; and
materials of the second pixel defining structure comprise fluorinated polymethyl methacrylate or fluorinated polyimide.

6. The display panel according to claim 1 , wherein the pixel defining layer is of an integrated structure;
a bottom surface of the communicating groove has a lyophilic property; and
a surface except for the communicating grooves, of the pixel defining layer facing away from the base substrate, has a lyophobic property.

7. The display panel according to claim 1 , wherein a thickness of the pixel defining layer at a position except for the openings and the communicating groove is within a range of 0.5 μm-3 μm.

8. The display panel according to claim 1 , wherein a distance between a bottom surface of the communicating groove and a surface of the pixel defining layer close to the base substrate is within a range of 0.1 μm-1 μm.

9. A method for manufacturing the display panel according to claim 1 , comprising:
forming the pixel defining layer on the base substrate and patterning the pixel defining layer to form the plurality of openings and a plurality of communicating grooves; and
forming an organic light-emitting function layer through an ink-jet printing technique.

10. The manufacturing method according to claim 9 , wherein the forming the pixel defining layer on the base substrate and patterning the pixel defining layer to form the plurality of openings and the plurality of communicating grooves, comprises:
forming a first pixel defining layer on the base substrate through a lyophilic material and patterning the first pixel defining layer to obtain a plurality of first pixel defining structures;
forming a second pixel defining layer on the first pixel defining layer through a lyophobic material and patterning the second pixel defining layer to obtain a second pixel defining structure; or
forming the second pixel defining layer on the base substrate through a lyophobic material and patterning the second pixel defining layer to obtain the second pixel defining structure; and
forming the first pixel defining layer on the second pixel defining layer through the lyophilic material and patterning the first pixel defining layer to obtain the plurality of first pixel defining structures.

11. The manufacturing method according to claim 9 , wherein forming the pixel defining layer on the base substrate and patterning the pixel defining layer to form the plurality of openings and the plurality of communicating grooves, comprises:
forming the pixel defining layer on the base substrate through the lyophobic material; and
patterning the pixel defining layer through a half-tone mask plate to obtain the openings and the communicating grooves with lyophilic bottom surfaces.

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

Assignees

• Boe Technology Group Co Ltd

Inventors

• Hou Wenjun
• Shih Huaiting

Classifications

• H10K71/135

  using ink-jet printing · CPC title

• H10K59/353 Primary

  characterised by the geometrical arrangement of the RGB subpixels · CPC title

• H10K59/1201

  Manufacture or treatment · CPC title

• H10K59/122 Primary

  Pixel-defining structures or layers, e.g. banks · CPC title

• H10K59/35

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