OLED display panel

Patent metadata

Field	Value
Publication number	US-12563944-B2
Application number	US-202218005676-A
Country	US
Kind code	B2
Filing date	Feb 28, 2022
Priority date	Feb 28, 2022
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

An OLED display panel includes a base substrate and an OLED device on the base substrate. The OLED device includes: an auxiliary electrode in the non-light-emitting region, the auxiliary electrode includes a conductive layer and a conductive column on a side of the conductive layer away from the base substrate, and an orthographic projection of the conductive column on the base substrate is within an orthographic projection of the conductive layer on the base substrate; and an insulating layer between the conductive layer and the base substrate; a groove is arranged on a surface of the insulating layer away from the base substrate, and an orthographic projection of the groove on the base substrate at least partially overlaps with the orthographic projection of the isolation structure on the base substrate.

First claim

What is claimed is:

1 . An OLED display panel, comprising:
a base substrate and an OLED device on the base substrate, wherein the OLED device comprises a light-emitting region and a non-light-emitting region, wherein the OLED device further comprises: a first electrode in the light-emitting region; an auxiliary electrode in the non-light-emitting region, wherein the auxiliary electrode comprises a conductive layer and a conductive column on a side of the conductive layer away from the base substrate, and wherein an orthographic projection of the conductive column on the base substrate is within an orthographic projection of the conductive layer on the base substrate; an organic light-emitting layer on a side of the first electrode away from the base substrate; a second electrode on a side of the organic light-emitting layer away from the base substrate; an isolation structure on a side of the conductive column away from the base substrate, wherein the orthographic projection of the conductive column on the base substrate is within an orthographic projection of the isolation structure on the base substrate; and an insulating layer between the conductive layer and the base substrate, and
wherein a groove is arranged on a surface of the insulating layer away from the base substrate, and an orthographic projection of the groove on the base substrate at least partially overlaps with the orthographic projection of the isolation structure on the base substrate,
wherein the OLED device further comprises:
a gate layer; and
a source drain layer,
wherein the gate layer has a concave structure at a position corresponding to the groove.

2 . The OLED display panel as claimed in claim 1 , wherein the second electrode contacts a part of a top surface of the conductive layer and a part of a side surface of the conductive column.

3 . The OLED display panel as claimed in claim 1 , wherein a distance of the orthographic projection of the isolation structure on the base substrate extends beyond the orthographic projection of the conductive column on the base substrate is a, a distance between an orthographic projection of an edge of the groove on the base substrate and the orthographic projection of the conductive column on the base substrate is z, and z is less than a.

4 . The OLED display panel as claimed in claim 1 , wherein a depth of the groove is greater than a thickness of the organic light-emitting layer.

5 . The OLED display panel as claimed in claim 3 , wherein a shape of the groove is a spherical crown, and a diameter of the groove is greater than a.

6 . The OLED display panel as claimed in claim 5 , wherein the diameter of the groove is greater than z.

7 . The OLED display panel as claimed in claim 1 , wherein a shape of the groove is selected from any one of a cuboid, a spherical crown, or a connected shape of at least two spherical crowns.

8 . The OLED display panel as claimed in claim 1 , wherein a bottom surface of the isolation structure is in direct contact with a top surface of the conductive column, a material of the isolation structure comprises one of indium tin oxide and indium zinc oxide, and a material of the conductive column comprises at least one of aluminum, copper, molybdenum or gold.

9 . The OLED display panel as claimed in claim 1 , wherein a material of the insulating layer is resin.

10 . The OLED display panel as claimed in claim 1 , wherein a material of the conductive layer comprises one of indium tin oxide or indium zinc oxide, and a material of the second electrode comprises one of indium tin oxide or indium zinc oxide.

11 . The OLED display panel as claimed in claim 1 , wherein the conductive layer comprises a through hole, and a part of the conductive column fills the through hole.

12 . The OLED display panel as claimed in claim 1 , wherein a bottom surface of the conductive column is in direct contact with a top surface of the conductive layer.

13 . The OLED display panel as claimed in claim 1 , wherein the first electrode is connected to a thin film transistor through a via hole in the insulating layer, and a width of the groove is less than a width of the via hole in the insulating layer.

14 . The OLED display panel as claimed in claim 13 , wherein a slope angle of the groove is less than a slope angle of the via hole in the insulating layer.

15 . The OLED display panel as claimed in claim 1 , further comprising:
a pixel definition layer, wherein an edge of the pixel definition layer extends to the groove.

16 . The OLED display panel as claimed in claim 15 , wherein a slope angle of the groove is less than a slope angle of the edge of the pixel definition layer.

17 . The OLED display panel as claimed in claim 1 , wherein a bottom vertex of the groove and the isolation structure do not overlap in a direction perpendicular to the base substrate.

18 . An OLED display panel, comprising:
a base substrate; an OLED device on the base substrate; and an interlayer dielectric layer, wherein the OLED device comprises a light-emitting region and a non-light-emitting region, wherein the OLED device further comprises: a first electrode in the light-emitting region; an auxiliary electrode in the non-light-emitting region, wherein the auxiliary electrode comprises a conductive layer and a conductive column on a side of the conductive layer away from the base substrate, and wherein an orthographic projection of the conductive column on the base substrate is within an orthographic projection of the conductive layer on the base substrate; an organic light-emitting layer on a side of the first electrode away from the base substrate; a second electrode on a side of the organic light-emitting layer away from the base substrate; an isolation structure on a side of the conductive column away from the base substrate, wherein the orthographic projection of the conductive column on the base substrate is within an orthographic projection of the isolation structure on the base substrate; and an insulating layer between the conductive layer and the base substrate, and
wherein a groove is arranged on a surface of the insulating layer away from the base substrate, and an orthographic projection of the groove on the base substrate at least partially overlaps with the orthographic projection of the isolation structure on the base substrate, and
wherein the interlayer dielectric layer is provided with a concave structure matching a shape of the groove at a position corresponding to the groove.

19 . The OLED display panel as claimed in claim 18 , wherein a source electrode and a drain electrode of a thin film transistor are connected with an active layer of the thin film transistor through a via hole in the interlayer dielectric layer, and a size of the via hole in the interlayer dielectric layer is larger than a size of the via hole in the insulating layer.

Assignees

• Hefei Boe Joint Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Wang Xinxin
• Zhang Dacheng
• Liu Ning
• Wang Yu
• Zhou Bin
• Yuan Can

Classifications

• H10K59/124 Primary

  Insulating layers formed between TFT elements and OLED elements · CPC title

• H10K59/1201

  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

• H10K59/80522 Primary

  combined with auxiliary electrodes · CPC title