US-12622161-B2 - Display substrate and related device

US12622161B2US 12622161 B2US12622161 B2US 12622161B2US-12622161-B2

Abstract

Provided are a display substrate and a related device, belonging to the technical field of display. The display substrate includes a first sub-pixel and a second sub-pixel provided on a base substrate and having different colors. An orthographic projection of a first organic light-emitting layer of the first sub-pixel and an orthographic projection of a second organic light-emitting layer of the second sub-pixel onto the base substrate have an overlapping area, an insulating blocking layer is provided between the first organic light-emitting layer and the second organic light-emitting layer, and an orthographic projection of the blocking layer onto the base substrate covers at least part of the overlapping area. The technical solution of the present disclosure can prevent crosstalk between adjacent pixels.

Inventors

Guanyin WEN
Yue Liu

Assignees

BOE TECHNOLOGY GROUP CO., LTD.

Dates

Publication Date: 20260505
Application Date: 20211111
Priority Date: 20210201

Claims (13)

1 . A display substrate, comprising a first sub-pixel, a second sub-pixel and a third sub-pixel provided on a base substrate, wherein the first sub-pixel is red, the second sub-pixel is green, and the third sub-pixel is blue, wherein an orthographic projection of a first organic light-emitting layer of the first sub-pixel and an orthographic projection of a second organic light-emitting layer of the second sub-pixel onto the base substrate have a first overlapping area, wherein the orthographic projection of the second organic light-emitting layer and an orthographic projection of a third organic light-emitting layer of the third sub-pixel onto the base substrate have a second overlapping area, wherein the orthographic projection of the third organic light-emitting layer and the orthographic projection of the first organic light-emitting layer onto the base substrate have a third overlapping area, wherein an insulating blocking layer is sandwiched between the first organic light-emitting layer and the second organic light-emitting layer in the first overlapping area, and configured to block flow of holes therebetween, wherein the insulating blocking layer is not present in the second overlapping area of and the insulating blocking layer is not present in the third overlapping area.
2 . The display substrate according to claim 1 , wherein the orthographic projection of the insulating blocking layer onto the base substrate covers the whole first overlapping area.
3 . The display substrate according to claim 1 , wherein the first organic light-emitting layer, the insulating blocking layer and the second organic light-emitting layer are arranged in sequence in a direction away from the base substrate, an orthographic projection of a first part, away from the surface of the base substrate, of the first organic light-emitting layer onto the base substrate coincides with the first overlapping area, wherein the first organic light-emitting layer comprises a first side surface close to the second organic light-emitting layer and intersecting the first part, and the insulating blocking layer covers the first part and the first side surface.
4 . The display substrate according to claim 1 , wherein the display substrate comprises a pixel definition layer on the base substrate, the pixel definition layer comprises a plurality of pixel definition layer openings corresponding to sub-pixels, and the orthographic projection of the insulating blocking layer onto the base substrate is located within an orthographic projection of the pixel definition layer onto the base substrate.
5 . The display substrate according to claim 1 , wherein the display substrate further comprises a hole transport layer between the first organic light-emitting layer and the second organic light-emitting layer and the base substrate, and the insulating blocking layer is located on a side of the hole transport layer away from the base substrate.
6 . The display substrate according to claim 1 , wherein the insulating blocking layer has a thickness of 10 nm to 50 nm.
7 . The display substrate according to claim 1 , wherein the insulating blocking layer has a mobility of less than 10 −8 cm 2 /(V·s).
8 . The display substrate according to claim 7 , wherein the insulating blocking layer is made of silicon nitride.
9 . A display device, comprising a display substrate, the display substrate comprising a first sub-pixel, a second sub-pixel, and a third sub-pixel provided on a base substrate, wherein the first sub-pixel is red, the second sub-pixel is green, and the third sub-pixel is blue, wherein an orthographic projection of a first organic light-emitting layer of the first sub-pixel and an orthographic projection of a second organic light-emitting layer of the second sub-pixel onto the base substrate have a first overlapping area, wherein the orthographic projection of the second organic light-emitting layer and an orthographic projection of a third organic light-emitting layer of the third sub-pixel onto the base substrate have a second overlapping area, wherein the orthographic projection of the third organic light-emitting layer and the orthographic projection of the first organic light-emitting layer onto the base substrate have a third overlapping area, wherein an insulating blocking layer is sandwiched between the first organic light-emitting layer and the second organic light-emitting layer in the first overlapping area, and configured to block flow of holes therebetween, wherein the insulating blocking layer is not present in the second overlapping area er and the insulating blocking layer is not present in the third overlapping area.
10 . The display device according to claim 9 , wherein the orthographic projection of the insulating blocking layer onto the base substrate covers the whole first overlapping area.
11 . The display device according to claim 9 , wherein the first organic light-emitting layer, the insulating blocking layer and the second organic light-emitting layer are arranged in sequence in a direction away from the base substrate, an orthographic projection of a first part, away from the surface of the base substrate, of the first organic light-emitting layer onto the base substrate coincides with the first overlapping area, wherein the first organic light-emitting layer comprises a first side surface close to the second organic light-emitting layer and intersecting the first part, and the insulating blocking layer covers the first part and the first side surface.
12 . A method for manufacturing a display substrate, the display substrate comprising a first sub-pixel, a second sub-pixel, and a third sub-pixel provided on a base substrate, wherein the first sub-pixel is red, the second sub-pixel is green, and the third sub-pixel is blue, wherein an orthographic projection of a first organic light-emitting layer of the first sub-pixel and an orthographic projection of a second organic light-emitting layer of the second sub-pixel onto the base substrate have a first overlapping area, wherein the orthographic projection of the second organic light-emitting layer and an orthographic projection of a third organic light-emitting layer of the third sub-pixel onto the base substrate have a second overlapping area, wherein the orthographic projection of the third organic light-emitting layer and the orthographic projection of the first organic light-emitting layer onto the base substrate have a third overlapping area, the manufacturing method comprising: forming an insulating blocking layer, wherein the insulating blocking layer is sandwiched between the first organic light-emitting layer and the second organic light-emitting layer in the first overlapping area, and configured to block flow of holes therebetween, wherein the insulating blocking layer is not present in the second overlapping area er and the insulating blocking layer is not present in the third overlapping area.
13 . The method according to claim 12 , wherein the manufacturing method specifically comprises: forming the first organic light-emitting layer; forming the insulating blocking layer in the first overlapping area; and forming the second organic light-emitting layer.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application is the U.S. national phase of PCT Application No. PCT/CN2021/130053 filed on Nov. 11, 2021, which claims priority to Chinese Patent Application No. 202110137385.6 filed in China on Feb. 1, 2021, the disclosure of which are incorporated in their entirety by reference herein. TECHNICAL FIELD The present disclosure relates to the technical field of display, and more particularly, to a display substrate, and a related device. BACKGROUND Organic Light Emitting Diode (OLED) display devices are one of the hot spots in the field of flat panel displays. Compared with liquid crystal displays, OLED display devices have many advantages such as low power consumption, low production cost, self-luminescence, wide viewing angle, fast response, and so forth. At present, in the field of flat panel displays, OLED display devices have begun to replace the traditional Liquid Crystal Displays (LCDs). SUMMARY The technical problem to be solved by the present disclosure is to provide a display substrate, and a related device, which can prevent crosstalk between adjacent pixels effectively. In order to solve the above technical problem, the embodiments of the present disclosure provide the following technical solutions. In an aspect, a display substrate is provided, including a first sub-pixel and a second sub-pixel provided on a base substrate and having different colors, wherein an orthographic projection of a first organic light-emitting layer of the first sub-pixel and an orthographic projection of a second organic light-emitting layer of the second sub-pixel onto the base substrate have an overlapping area, an insulating blocking layer is provided between the first organic light-emitting layer and the second organic light-emitting layer, and an orthographic projection of the blocking layer onto the base substrate covers at least part of the overlapping area. In some embodiments, the orthographic projection of the blocking layer onto the base substrate covers the whole overlapping area. In some embodiments, the first organic light-emitting layer, the blocking layer and the second organic light-emitting layer are arranged in sequence in a direction away from the base substrate, an orthographic projection of a first part, away from the surface of the base substrate, of the first organic light-emitting layer onto the base substrate coincides with the overlapping area, the first organic light-emitting layer includes a first side surface close to the second organic light-emitting layer and intersecting the first part, and the blocking layer covers the first part and the first side surface. In some embodiments, the display substrate includes a pixel definition layer on the base substrate, the pixel definition layer includes a plurality of pixel definition layer openings corresponding to sub-pixels, and the orthographic projection of the blocking layer onto the base substrate is located within an orthographic projection of the pixel definition layer onto the base substrate. In some embodiments, the display substrate includes a red sub-pixel, a green sub-pixel and a blue sub-pixel, and the first sub-pixel and the second sub-pixel are selected from the red sub-pixel, the green sub-pixel and the blue sub-pixel. In some embodiments, the first sub-pixel is one selected from the green sub-pixel and the red sub-pixel, and the second sub-pixel is the other one selected from the green sub-pixel and the red sub-pixel. In some embodiments, the display substrate further includes a hole transport layer between the organic light-emitting layer and the base substrate, and the blocking layer is located on a side of the hole transport layer away from the base substrate. In some embodiments, the display substrate further includes a third sub-pixel, the third sub-pixel includes a third organic light-emitting layer, the blocking layer includes a first blocking layer and a second blocking layer, the first blocking layer is located between the first organic light-emitting layer and the second organic light-emitting layer, and the second blocking layer is located between the second organic light-emitting layer and the third organic light-emitting layer. In some embodiments, a distance between a surface of the first blocking layer on the side close to the base substrate and a surface of the base substrate on the side close to the first blocking layer is a first distance, the distance between a surface of the second blocking layer on the side close to the base substrate and a surface of the base substrate on the side close to the second blocking layer is a second distance, and the first distance is different from the second distance. In some embodiments, in a direction away from the base substrate, the organic light-emitting layer includes an electron blocking layer EBL and a light-emitting layer EML which are laminated. In some embodiments, the first blocking layer is located between the EML of the firs