Display substrate and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-11031578-B2
Application number	US-201715775888-A
Country	US
Kind code	B2
Filing date	Sep 18, 2017
Priority date	Mar 3, 2017
Publication date	Jun 8, 2021
Grant date	Jun 8, 2021

Abstract

The present disclosure discloses a display substrate and a manufacturing thereof. The display substrate comprises a base substrate, a pixel defining layer formed on the base substrate, wherein the pixel defining layer is provided with an opening region comprising a bottom wall and at least one sidewall, wherein in the opening region, an edge of the bottom wall is provided with at least one hydrophilic inducing column, wherein at least one of the hydrophilic inducing column has a hydrophilic surface.

First claim

What is claimed is:

1. An display substrate, comprising:
a base substrate; and
a pixel defining layer on the base substrate, wherein the pixel defining layer is provided with an opening region comprising a bottom wall and at least one sidewall, wherein in the opening region, an edge of the bottom wall is provided with at least one hydrophilic inducing column, wherein at least one of the hydrophilic inducing column has a hydrophilic surface.

2. The display substrate according to claim 1 , wherein a plurality of hydrophilic inducing columns are provided, the bottom wall is of a regular shape, the plurality of hydrophilic inducing columns are provided symmetrically with respect to at least one symmetrical axis or a center of symmetry of the bottom wall.

3. The display substrate according to claim 1 , wherein the opening region has a plurality of sidewalls, a plurality of hydrophilic inducing columns are provided, the bottom wall has at least three sides connected by arcs at corners of the bottom wall, each corner of the bottom wall is provided with a respective one of the plurality of hydrophilic inducing columns.

4. The display substrate according to claim 1 , wherein the at least one hydrophilic inducing column is of the same height as the opening region.

5. The display substrate according to claim 1 , wherein the at least one hydrophilic inducing column has a hydrophilicity greater than a hydrophilicity of the bottom wall.

6. The display substrate according to claim 1 , wherein at least one hydrophobic inducing column is provided on an upper surface of the pixel defining layer near the at least one sidewall, wherein at least one of the hydrophobic inducing column has a hydrophobic surface.

7. The display substrate according to claim 6 , wherein a plurality of hydrophobic inducing columns are provided, a region bounded by a boundary of the upper surface of the pixel defining layer with the at least one sidewall is of a regular shape, and the plurality of hydrophilic inducing columns are provided symmetrically with respect to at least one symmetrical axis or a center of symmetry of the region.

8. The display substrate according to claim 6 , wherein the opening region has a plurality of sidewalls, a plurality of hydrophobic inducing columns are provided, and a respective one of the plurality of the hydrophobic inducing column is provided on the upper surface of the pixel defining layer near a respective corner of the plurality of sidewalls.

9. The display substrate according to claim 6 , wherein a height of the at least one hydrophobic inducing column is greater than a thickness of the pixel defining layer.

10. The display substrate according to claim 6 , wherein a plurality of hydrophobic inducing columns are provided, and the plurality of hydrophobic inducing columns are of the same height.

11. The display substrate according to claim 1 , wherein a plurality of hydrophilic inducing columns are formed, the opening region has four sidewalls, the bottom wall has four sides connected by arcs at corners of the bottom wall, and a respective one of the plurality of hydrophilic inducing columns is provided at each corner of the bottom wall.

12. The display substrate according to claim 6 , wherein the opening region has four sidewalls, a plurality of hydrophobic inducing columns are formed, and a respective one of the plurality of hydrophobic inducing columns is provided on the upper surface of the pixel defining layer near a respective corner of the four sidewalls.

13. A method of manufacturing an display substrate comprising:
providing a base substrate;
forming a pixel defining layer on the base substrate;
forming in the pixel defining layer an opening region comprising a bottom wall and at least one sidewall;
forming, in the opening region, at least one hydrophilic inducing column at an edge of the bottom wall, wherein at least one of hydrophilic inducing column has a hydrophilic surface.

14. The method according to claim 13 , wherein a plurality of hydrophilic inducing columns are formed, the bottom wall is of a regular shape, and forming, in the opening region, at least one hydrophilic inducing column at an edge of the bottom wall comprises forming the plurality of hydrophilic inducing columns symmetrically with respect to at least one symmetrical axis or a center of symmetry of the bottom wall.

15. The method according to claim 13 , wherein the opening region has a plurality of sidewalls, a plurality of hydrophilic inducing columns are formed, the bottom wall has at least three sides connected by arcs at corners of the bottom wall, and forming, in the opening region, at least one hydrophilic inducing column at an edge of the bottom wall comprises forming a respective one of the plurality of hydrophilic inducing columns at each corner of the bottom wall.

16. The method according to claim 13 , the method further comprising:
forming at least one hydrophobic inducing column on an upper surface of the pixel defining layer near the at least one sidewall, wherein at least one of the hydrophobic inducing column has a hydrophobic surface.

17. The method according to claim 16 , wherein the opening region has a plurality of sidewalls, a plurality of hydrophobic inducing columns are formed, and forming at least one hydrophobic inducing column on an upper surface of the pixel defining layer near the at least one sidewall comprises forming a respective one of the plurality of hydrophobic inducing column on the upper surface of the pixel defining layer near a respective corner of the plurality of sidewalls.

18. The method according to claim 13 , wherein a plurality of hydrophilic inducing columns are formed, the opening region has four sidewalls, and the bottom wall has four sides connected by areas at corners of the bottom wall, forming, in the opening region, at least one hydrophilic inducing column at an edge of the bottom wall comprises forming a respective one of the plurality of hydrophilic inducing columns at each corner of the bottom wall.

19. The method according to claim 16 , wherein a plurality of hydrophobic inducing columns are formed, a region bounded by a boundary of the upper surface of the pixel defining layer with the at least one sidewall is of a regular shape, and forming at least one hydrophobic inducing column on an upper surface of the pixel defining layer near the at least one sidewall comprises forming the plurality of hydrophobic inducing columns symmetrically with respect to at least one symmetrical axis or a center of symmetry of the region.

20. The method according to claim 16 , wherein the opening region has four sidewalls, a plurality of hydrophobic inducing columns are formed, and forming at least one hydrophobic inducing column on an upper surface of the pixel defining layer near the at least one sidewall comprises forming a respective one of the plurality of hydrophobic inducing columns on the upper surface of the pixel defining layer near a respective corner of the four sidewalls.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Zhao Dejiang
• Chen Yimin

Classifications

• H10K71/00

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

• H10K59/122 Primary

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

• H01L27/326

  Electricity · mapped topic

• H01L27/3246

  Electricity · mapped topic

• H01L27/3223

  Electricity · mapped topic