Display substrate and display device

Patent metadata

Field	Value
Publication number	US-12436638-B2
Application number	US-202117800045-A
Country	US
Kind code	B2
Filing date	Nov 4, 2021
Priority date	May 19, 2021
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

A display substrate and a display device are disclosed, and the display substrate has a plurality of sub-pixels, and includes a base substrate, a driving circuit layer, a pixel definition layer and a light-emitting device layer, and a black matrix layer. Each sub-pixel includes a pixel driving circuit in the driving circuit layer and a light-emitting device in the light-emitting device layer. The black matrix layer includes a plurality of first light-transmitting openings respectively exposing the light-emitting devices of the plurality of sub-pixels in a direction perpendicular to a surface of the base substrate. The pixel definition layer includes a plurality of sub-pixel openings, at least part of the plurality of sub-pixel openings are in one-to-one correspondence with and at least partially overlapped with the plurality of first light-transmitting openings, and at least one of the plurality of first light-transmitting openings has an arc-shaped edge.

First claim

What is claimed is:

1. A display substrate, having a plurality of sub-pixels arranged in an array, and comprising a base substrate, a driving circuit layer on the base substrate, a pixel definition layer and a light-emitting device layer on a side of the driving circuit layer away from the base substrate, and a black matrix layer on a side of the light-emitting device layer away from the base substrate,
wherein each of the plurality of sub-pixels comprises a pixel driving circuit in the driving circuit layer and a light-emitting device in the light-emitting device layer, and the pixel driving circuit is configured to drive the light-emitting device;
the pixel definition layer comprises a plurality of sub-pixel openings, the light-emitting device comprises a first electrode layer, a light-emitting material layer, and a second electrode layer that are sequentially stacked in a direction away from the base substrate, the pixel definition layer is on a side of the first electrode layer away from the base substrate, and the plurality of sub-pixel openings respectively expose first electrode layers of light-emitting devices of the plurality of sub-pixels;
the black matrix layer includes a plurality of first light-transmitting openings respectively exposing the light-emitting devices of the plurality of sub-pixels in a direction perpendicular to a surface of the base substrate, and at least one of the plurality of first light-transmitting openings has an arc-shaped edge; and
in the direction perpendicular to the surface of the base substrate, at least part of the plurality of sub-pixel openings are in one-to-one correspondence with and at least partially overlapped with the plurality of first light-transmitting openings;
the first electrode layer comprises a main body portion and a connection portion, the connection portion is configured to be electrically connected to the pixel driving circuit, and at least part of the main body portion is exposed by the sub-pixel opening; and in a direction parallel to the surface of the base substrate, a plane shape of the main body portion is at least partially same as a plane shape of the sub-pixel opening.

2. The display substrate according to claim 1 , wherein in a direction parallel to the surface of the base substrate, a plane shape of at least one of the plurality of first light-transmitting openings is elliptical, semi-elliptical, circular, semi-circular, racetrack-shaped, or semi-racetrack-shaped.

3. The display substrate according to claim 1 , wherein in a direction parallel to the surface of the base substrate, a plane shape of at least one of the plurality of sub-pixel openings is elliptical, semi-elliptical, circular, semi-circular, racetrack-shaped, or semi-racetrack-shaped.

4. The display substrate according to claim 1 , wherein for a sub-pixel opening and a first light-transmitting opening that are provided corresponding to each other, and in a direction parallel to the surface of the base substrate, a plane shape of the sub-pixel opening is same as a plane shape of the first light-transmitting opening.

5. The display substrate according to claim 4 , wherein an orthographic projection of the sub-pixel opening on the base substrate is located within an orthographic projection of the first light-transmitting opening on the base substrate.

6. The display substrate according to claim 5 , wherein a minimum distance between an edge of the orthographic projection of the sub-pixel opening on the base substrate and an edge of the orthographic projection of the first light-transmitting opening on the base substrate ranges from 1 μm to 3 μm.

7. The display substrate according to claim 1 , wherein an orthographic projection of the sub-pixel opening on the base substrate is located within an orthographic projection of the main body portion on the base substrate;
an orthographic projection of a first light-transmitting opening corresponding to the sub-pixel opening on the base substrate is located within the orthographic projection of the main body portion on the base substrate.

8. The display substrate according to claim 7 , wherein a minimum distance between an edge of the orthographic projection of the sub-pixel opening on the base substrate and an edge of the orthographic projection of the main body portion on the base substrate ranges from 1 μm to 5 μm.

9. The display substrate according to claim 8 , wherein the orthographic projection of the main body portion on the base substrate is located within an orthographic projection of a first light-transmitting opening corresponding to the sub-pixel opening on the base substrate.

10. The display substrate according to claim 1 , further comprising a color film layer, wherein the color film layer comprises a plurality of color film patterns, and the plurality of color film patterns are respectively provided in the plurality of first light-transmitting openings.

11. The display substrate according to claim 1 , wherein the black matrix layer further includes a plurality of second light-transmitting openings, and the plurality of second light-transmitting openings are respectively between the plurality of first light-transmitting openings, and the driving circuit layer comprises a plurality of light-transmitting portions; and
at least part of the plurality of second light-transmitting openings are in one-to-one correspondence with at least part of the plurality of light-transmitting portions, and are configured to transmit light in a predetermined angle range with the surface of the base substrate.

12. The display substrate according to claim 11 , wherein for a second light-transmitting opening and a light-transmitting portion that are provided corresponding to each other, and in a direction parallel to the surface of the base substrate, a plane size of the second light-transmitting opening is smaller than a plane size of the light-transmitting portion.

13. The display substrate according to claim 12 , wherein for the second light-transmitting opening and the light-transmitting portion that are provided corresponding to each other, an orthographic projection of the second light-transmitting opening on the base substrate at least partially overlaps with an orthographic projection of the light-transmitting portion on the base substrate.

14. The display substrate according to claim 1 , wherein the plurality of sub-pixels comprise a red sub-pixel, a green sub-pixel, and a blue sub-pixel;
a first light-transmitting opening exposing a light-emitting device of the red sub-pixel is substantially in a shape of a first ellipse;
a first light-transmitting opening exposing a light-emitting device of the green sub-pixel is substantially in a shape of a second ellipse, a length of a long axis of the second ellipse is smaller than a length of a long axis of the first ellipse, and a length of a short axis of the second ellipse is smaller than a length of a short axis of the first ellipse; or, the first light-transmitting opening exposing the light-emitting device of the green sub-pixel is substantially in a shape of a semi-ellipse; and
a first light-transmitting opening exposing a light-emitting device of the blue sub-pixel is substantially in a shape of a third ellipse, a length of a long axis of the third ellipse is smaller than the length of the long axis of the first ellipse, and a length of a short axis of the third ellipse is greater than the length of the short axis of the first ellipse.

15. The display substrate according to claim 14 , wherein the first light-transmitting opening exposing the light-emitting device of the red sub-pixel comprises a first ar

Assignees

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

Inventors

• Chen Youchun
• Guo Dan
• Li Shuo
• Gao Hongcheng
• Bao Jiandong
• Wang Jiwei
• Guo Sheng
• Hou Peng
• Liu Yue

Classifications

• H10K59/65

  OLEDs integrated with inorganic image sensors · CPC title

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title

• H10K59/352

  the areas of the RGB subpixels being different · CPC title

• H10K59/873

  Encapsulations · CPC title

• H10K59/122

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