Display substrate, manufacturing method thereof, and display apparatus

Patent metadata

Field	Value
Publication number	US-11690269-B2
Application number	US-202117352265-A
Country	US
Kind code	B2
Filing date	Jun 19, 2021
Priority date	Nov 2, 2017
Publication date	Jun 27, 2023
Grant date	Jun 27, 2023

Abstract

A display substrate includes pixel-defining layer and sub-pixels of three colors. The pixel-defining layer defines a plurality of sub-pixel areas having the sub-pixels arranged in therein; the pixel-defining layer includes a first pixel-defining layer and a second pixel-defining layer; a height of the second pixel-defining layer is smaller than a height of the first pixel-defining layer; and the first pixel-defining layer is configured to separate adjacent sub-pixels of different colors; the second pixel-defining layer is configured to separate adjacent sub-pixels of the same color; and the sub-pixels of three colors include red sub-pixels, blue sub-pixels, and green sub-pixels; the display substrate includes at least one column of sub-pixels, and in the at least one column of sub-pixels, sub-pixels belonging to a same column have a same color; and in a column of sub-pixels of the same color, corresponding light-emitting layers of at least two adjacent sub-pixels are connected.

First claim

What is claimed is:

1. A display substrate, comprising:
a pixel-defining layer; and
sub-pixels of three colors;
wherein:
the pixel-defining layer defines a plurality of sub-pixel areas;
the sub-pixels are arranged in the plurality of sub-pixel areas;
the pixel-defining layer includes a first pixel-defining layer and a second pixel-defining layer;
a height of the second pixel-defining layer is smaller than a height of the first pixel-defining layer; and
the first pixel-defining layer is configured to separate adjacent sub-pixels of different colors;
the second pixel-defining layer is configured to separate adjacent sub-pixels of the same color; and
the sub-pixels of three colors include red sub-pixels, blue sub-pixels, and green sub-pixels;
the display substrate includes at least one column of sub-pixels, and in the at least one column of sub-pixels, sub-pixels belonging to a same column have a same color; and
in a column of sub-pixels of the same color, corresponding light-emitting layers of at least two adjacent sub-pixels are connected.

2. The display substrate according to claim 1 , wherein:
the pixel-defining layer and the light-emitting layer of the sub-pixels are arranged on a structure; and
in a column of sub-pixels of the same color, an orthographic projection of the light-emitting layer on the structure overlaps an orthographic projection of a sidewall of the second pixel-defining layer on the structure.

3. The display substrate according to claim 1 , wherein in a column of sub-pixels of the same color, the light-emitting layer covers a sidewall of the second pixel-defining layer.

4. The display substrate of claim 1 , wherein the pixel-defining layer and the light-emitting layer of the sub-pixels are arranged on a structure, and in a column of sub-pixels of the same color, an orthographic projection of the light-emitting layer on the structure overlaps an orthographic projection of a sidewall of the first pixel-defining layer on the structure.

5. The display substrate of claim 1 , wherein in a column of sub-pixels of the same color, the light-emitting layer covers a sidewall of the first pixel-defining layer.

6. The display substrate of claim 1 , wherein the pixel-defining layer and the light-emitting layer of the sub-pixels are arranged on a structure, and in a column of sub-pixels of the same color, an orthographic projection of the light-emitting layer on the structure overlaps an orthographic projection of a top wall of the second pixel-defining layer on the structure.

7. The display substrate of claim 1 , wherein in a column of sub-pixels of the same color, the light-emitting layer covers a top wall of the second pixel-defining layer.

8. The display substrate of claim 1 , wherein in a column of sub-pixels of the same color, the light-emitting layer does not cover the top wall of the first pixel-defining layer.

9. The display substrate according to claim 1 , wherein in at least two of the adjacent sub-pixels, the light-emitting layer includes a first portion, where a distance between an upper surface of the first portion and an upper surface of an anode of the sub-pixels is greater than a distance between the second pixel defining layer and an upper surface of the anode.

10. The display substrate according to claim 1 , wherein at least of the two adjacent sub-pixels, a height of the light-emitting layer is less than or equal to a height of the first pixel-defining layer.

11. The display substrate of claim 1 , wherein the first pixel-defining layer, the second pixel-defining layer, and a lower surface of an anode of the sub-pixels are all in contact with a same structure.

12. The display substrate of claim 1 , wherein the first pixel-defining layer and the second pixel-defining layer are formed by one patterning process.

13. The display substrate according to claim 1 , wherein in the sub-pixels of at least one color, the thickness of an anode of the sub-pixels is greater than a thickness of the light-emitting layer.

14. The display substrate according to claim 1 , wherein in a row direction or in a column direction, a width of the second pixel-defining layer is less than a width of the first pixel-defining layer.

15. The display substrate of claim 1 , wherein the display substrate is an organic light-emitting diode display (OLED) substrate.

16. An organic light-emitting diode (OLED) display apparatus, comprising the display substrate of claim 1 .

17. An organic light-emitting diode (OLED) display apparatus, comprising the display substrate of claim 2 .

18. An organic light-emitting diode (OLED) display apparatus, comprising the display substrate of claim 3 .

19. An organic light-emitting diode (OLED) display apparatus, comprising the display substrate of claim 4 .

Assignees

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

Inventors

• Peng Chuan
• Cui Yan
• Zhang Yu

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

• H10K59/353 Primary

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

• H10K50/11

  characterised by the electroluminescent [EL] layers · CPC title

• H10K59/173

  comprising banks or shadow masks · CPC title