Light emitting substrate and preparation method therefor, and light emitting apparatus

Patent metadata

Field	Value
Publication number	US-12484390-B2
Application number	US-202218027922-A
Country	US
Kind code	B2
Filing date	Apr 21, 2022
Priority date	Apr 21, 2022
Publication date	Nov 25, 2025
Grant date	Nov 25, 2025

Abstract

A light emitting substrate, including: a base substrate ( 200 ), at least one light emitting element ( 10 ), at least one anti-static trace ( 15 ), and a ground trace ( 13 ). The base substrate ( 200 ) includes a display region (AA) and a peripheral region (BB) located on at least one side of the display region (AA). The at least one light emitting element ( 10 ) and the at least one anti-static trace ( 15 ) are located in the display region (AA), and the at least one anti-static trace ( 15 ) is configured to surround the at least one light emitting element ( 10 ). The ground trace ( 13 ) is located in the peripheral region (BB), and the ground trace ( 13 ) is electrically connected with the at least one anti-static trace ( 15 ).

First claim

The invention claimed is:

1 . A light emitting substrate, comprising:
a base substrate, comprising a display region and a peripheral region located on at least one side of the display region; at least one light emitting element, located in the display region; at least one anti-static trace, located in the display region, the at least one anti-static trace being configured to surround the at least one light emitting element; and a ground trace, located in the peripheral region, the ground trace being electrically connected with the at least one anti-static trace; wherein adjacent anti-static traces in the display region constitute an integrated structure, or the adjacent anti-static traces in the display region are electrically connected through a first connection electrode; and the anti-static trace comprises: a first extension portion and a first connection portion connected to each other, wherein an orthographic projection of the first extension portion on the base substrate is annular; the first connection portion of the anti-static trace and a first connection portion of another anti-static trace constitute an integrated structure, or the first connection portion of the anti-static trace is electrically connected with a first connection portion of another anti-static trace through the first connection electrode.

2 . The light emitting substrate according to claim 1 , wherein the at least one anti-static trace constitutes a mesh structure, the mesh structure comprises at least one mesh, and the at least one mesh surrounds the at least one light emitting element.

3 . The light emitting substrate according to claim 1 , wherein the first connection electrode is located on a side of the anti-static trace away from the base substrate.

4 . The light emitting substrate according to claim 1 , wherein the ground trace is electrically connected to the at least one anti-static trace through a second connection electrode.

5 . The light emitting substrate according to claim 4 , wherein the ground trace and the anti-static trace are of a same layer structure, and the second connection electrode is located on a side of the ground trace away from the base substrate.

6 . The light emitting substrate according to claim 1 , wherein an orthographic projection of a portion for emitting light of the light emitting element on the base substrate is triangular.

7 . A light emitting apparatus, comprising the light emitting substrate according to claim 1 .

8 . The light emitting apparatus according to claim 7 , further comprising: a connection unit and a drive circuit board, wherein the connection unit comprises at least one second ground pin, and the drive circuit board comprises a third ground pin; the second ground pin is electrically connected to a first ground pin in a bonding region of the light emitting substrate and also electrically connected to the third ground pin of the drive circuit board.

9 . A method for preparing a light emitting substrate, used for preparing the light emitting substrate according to claim 1 , comprising:
forming the at least one anti-static trace in the display region of the base substrate, and forming the ground trace in the peripheral region on at least one side of the display region; and forming the at least one light emitting element in the display region, wherein the ground trace is electrically connected to the at least one anti-static trace, and the anti-static trace is configured to surround the at least one light emitting element.

10 . A light emitting substrate, comprising:
a base substrate, comprising a display region and a peripheral region located on at least one side of the display region; at least one light emitting element, located in the display region; at least one anti-static trace, located in the display region, the at least one anti-static trace being configured to surround the at least one light emitting element; and a ground trace, located in the peripheral region, the ground trace being electrically connected with the at least one anti-static trace; wherein the display region is further provided with a pixel definition layer having at least one pixel opening, and a portion of the light emitting element located at the pixel opening is used for emitting light; and an orthographic projection of the pixel definition layer on the base substrate covers an orthographic projection of the anti-static trace on the base substrate; the light emitting element comprises: a first electrode, a second electrode, and an organic light emitting layer arranged between the first electrode and the second electrode; and the first electrode is located on a side of the organic light emitting layer close to the base substrate, the pixel opening of the pixel definition layer exposes at least a portion of the first electrode, the organic light emitting layer is in contact with the first electrode through the pixel opening, the second electrode is located on a side of the organic light emitting layer away from the base substrate, and the second electrode is in contact with the organic light emitting layer.

11 . The light emitting substrate according to claim 10 , further comprising: at least one first signal trace and at least one second signal trace, wherein the first signal trace extends from the peripheral region to the display region and is electrically connected to the first electrode of the at least one light emitting element; and the second signal trace is located in the peripheral region and is electrically connected to the second electrode of the at least one light emitting element.

12 . The light emitting substrate according to claim 11 , wherein in the display region, the anti-static trace is located between the first signal trace and the light emitting element.

13 . The light emitting substrate according to claim 11 , wherein in the peripheral region, the ground trace is located between the second signal trace and the first signal trace.

14 . The light emitting substrate according to claim 11 , further comprising: a first conductive layer located on a side of the at least one light emitting element close to the base substrate, wherein the first signal trace, the second signal trace, the anti-static trace and the ground trace are all located in the first conductive layer.

15 . The light emitting substrate according to claim 14 , further comprising: a first insulating layer located between the light emitting element and the first conductive layer, wherein an orthographic projection of the first insulating layer on the base substrate is not overlapped with an orthographic projection of a portion for emitting light of the at least one light emitting element on the base substrate.

16 . The light emitting substrate according to claim 11 , wherein the peripheral region comprises: a bonding region located on a side of the display region, the bonding region comprises:
at least one first ground pin, at least one first signal pin and at least one second signal pin; the first ground pin is electrically connected to the ground trace, the first signal pin is electrically connected to the first signal trace, and the second signal pin is electrically connected to the second signal trace; and the first ground pin is located between the first signal pin and the second signal pin.

17 . The light emitting substrate according to claim 10 , wherein a material of the first electrode of the light emitting element comprises a transparent conductive material, and a material of the second electrode comprises a metal material.

Assignees

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

Inventors

• Xiang Lian
• Li Lu

Classifications

• H10K59/122 Primary

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

• H10K59/1201

  Manufacture or treatment · CPC title

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title

• H10K50/80

  Constructional details · CPC title

• H10K59/00

  Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00 · CPC title