Light emitting panel and preparation method thereof, and light emitting apparatus

Patent metadata

Field	Value
Publication number	US-12557498-B2
Application number	US-202218021811-A
Country	US
Kind code	B2
Filing date	Apr 21, 2022
Priority date	Apr 21, 2022
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

Disclose is a light emitting panel, including: a display region and a peripheral region located on at least one side of the display region. The display region is provided with at least one light emitting element. The light emitting element includes: a first electrode, a second electrode, and an organic emitting layer disposed between the first electrode and the second electrode. In a direction perpendicular to the light emitting panel, the light emitting panel at least includes: a base substrate, and a first conductive layer and a second conductive layer located on the base substrate. The first conductive layer includes at least one first signal trace. The second conductive layer includes the first electrode of the light emitting element. The first conductive layer is in direct contact with the second conductive layer, and the first electrode of the light emitting element is connected with the first signal trace.

First claim

The invention claimed is:

1 . A light emitting panel, comprising: a display region and a peripheral region located on at least one side of the display region; the display region is provided with at least one light emitting element, and the light emitting element comprises a first electrode, a second electrode, and an organic emitting layer disposed between the first electrode and the second electrode;
in a direction perpendicular to the light emitting panel, the light emitting panel at least comprises: a base substrate, and a first conductive layer and a second conductive layer disposed on the base substrate; the first conductive layer comprises: at least one first signal trace; the second conductive layer comprises: a first electrode of the light emitting element; wherein the first conductive layer is in direct contact with the second conductive layer, and the first electrode of the light emitting element is directly connected with the first signal trace; or, a first insulation layer is disposed between the first conductive layer and the second conductive layer, the first electrode of the light emitting element is connected with the first signal trace through a via provided in the first insulation layer, and an orthographic projection of the first insulation layer on the base substrate is overlapped with an orthographic projection of a part of the light emitting element used for emitting light on the base substrate.

2 . The light emitting panel according to claim 1 , wherein the first signal trace in the display region comprises: a first extension portion; the first extension portion is grid-shaped, and an orthographic projection of the first extension portion on the base substrate is overlapped with an orthographic projection of the first electrode of the light emitting element electrically connected with the first signal trace on the base substrate.

3 . The light emitting panel according to claim 2 , wherein the first signal trace further comprises: a second extension portion, the second extension portion extends from the display region to the peripheral region, and the second extension portion is connected with the first extension portion.

4 . The light emitting panel according to claim 3 , wherein the display region is further provided with at least one auxiliary trace, and the auxiliary trace and the first electrode of the light emitting element are of a same-layer structure;
the auxiliary trace is in direct contact with the second extension portion of the first signal trace, and an orthographic projection of the auxiliary trace on the base substrate is overlapped with an orthographic projection of the second extension portion of the first signal trace on the base substrate.

5 . The light emitting panel according to claim 1 , wherein the second conductive layer is in direct contact with the first conductive layer, and the second conductive layer is located on a side of the first conductive layer away from the base substrate.

6 . The light emitting panel according to claim 5 , wherein in the display region, an orthographic projection of the second conductive layer on the base substrate covers an orthographic projection of the first conductive layer on the base substrate.

7 . The light emitting panel according to claim 5 , wherein in the peripheral region, an orthographic projection of the second conductive layer on the base substrate is partially overlapped with an orthographic projection of the first conductive layer on the base substrate.

8 . The light emitting panel according to claim 1 , wherein the second conductive layer is in direct contact with the first conductive layer, and the second conductive layer is located on a side of the first conductive layer close to the base substrate.

9 . The light emitting panel according to claim 1 , wherein the display region is further provided with a pixel definition layer having multiple pixel openings, a pixel opening exposes at least a portion of the first electrode of the light emitting element; the organic emitting layer of the light emitting element is in contact with the first electrode of the light emitting element through the pixel opening; the second electrode of the light emitting element is located on a side of the pixel definition layer away from the base substrate, and the second electrode of the light emitting element is in contact with the organic emitting layer of the light emitting element; a part of the light emitting element located at the pixel opening is used for emitting light.

10 . The light emitting panel according to claim 9 , wherein in the display region, an orthographic projection of the pixel definition layer on the base substrate covers an orthographic projection of the first conductive layer on the base substrate.

11 . The light emitting panel according to claim 9 , wherein the peripheral region is provided with multiple barrier dams, at least one of the multiple barrier dams surrounds the display region; the multiple barrier dams and the pixel definition layer are of a same-layer structure, and the multiple barrier dams are sequentially and continuously arranged along a direction away from the display region.

12 . The light emitting panel according to claim 11 , wherein along the direction away from the display region, a total length of the multiple barrier dams is greater than 144 microns.

13 . The light emitting panel according to claim 1 , wherein a material of the first conductive layer comprises a metal material, and a material of the second conductive layer comprises a transparent conductive material.

14 . A light emitting apparatus, comprising a light emitting panel according to claim 1 .

15 . A preparation method of a light emitting panel, wherein the light emitting panel comprises a display region and a peripheral region located on at least one side of the display region; the display region is provided with at least one light emitting element, the light emitting element comprises a first electrode, a second electrode, and an organic emitting layer disposed between the first electrode and the second electrode; the preparation method comprises:
forming a first conductive layer and a second conductive layer on a base substrate, wherein the first conductive layer comprises at least one first signal trace, and the second conductive layer comprises: a first electrode of the light emitting element; the first conductive layer is in direct contact with the second conductive layer, and the first electrode of the light emitting element is connected with the first signal trace.

16 . The preparation method according to claim 15 , wherein the first signal trace in the display region comprises: a first extension portion; the first extension portion is grid-shaped, and an orthographic projection of the first extension portion on the base substrate is overlapped with an orthographic projection of the first electrode of the light emitting element electrically connected with the first signal trace on the base substrate.

17 . The preparation method according to claim 15 , wherein the forming the first conductive layer and the second conductive layer on the base substrate comprises:
sequentially forming the first conductive layer and the second conductive layer that are in direct contact on the base substrate, wherein in the display region, an orthographic projection of the second conductive layer on the base substrate covers an orthographic projection of the first conductive layer on the base substrate; or, sequentially forming the second conductive layer and the first conductive layer

Assignees

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

Inventors

• Li Zeliang
• Gao Tao

Classifications

• H10K59/1201 Primary

  Manufacture or treatment · 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

• H10K59/122

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

• H10K59/131 Primary

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