OLED display panel, manufacturing method thereof, electronic device

Patent metadata

Field	Value
Publication number	US-11245101-B2
Application number	US-201916450656-A
Country	US
Kind code	B2
Filing date	Jun 24, 2019
Priority date	Jul 13, 2018
Publication date	Feb 8, 2022
Grant date	Feb 8, 2022

Abstract

A manufacturing method of an OLED display panel is provided. At least one of a electroluminescent material layer and a second electrode layer is formed such that a thickness of the second electrode layer in a light emitting region of the OLED display panel is less than that of the second electrode layer in a non-light emitting region of the OLED display panel. The method includes applying charges of a first conductivity type to a layer structure located below a to-be-formed layer and in the light emitting region, applying charges of the first conductivity type to a material of the to-be-formed layer, and applying the material of the to-be-formed layer having the charges of the first conductivity type to the layer structure to form the to-be-formed layer. An OLED display panel manufactured by the above method and an electronic device are further provided.

First claim

The invention claimed is:

1. An OLED display panel comprising:
a functional layer comprising a first electrode layer, an electroluminescent material layer, and a second electrode layer which are on a substrate successively along a light exit direction,
wherein a first thickness of the second electrode layer in a light emitting region of the OLED display panel is less than a second thickness of the second electrode layer in a non-light emitting region of the OLED display panel,
wherein the second electrode layer comprises a first metal and a second metal, and a work function of the first metal is smaller than a work function of the second metal, and
wherein a portion of the second electrode layer in the non-light emitting region of the OLED display panel comprises a groove, and a side surface of the electroluminescent material layer perpendicular to the substrate and close to the groove is in direct contact with the portion of the second electrode layer in the non-light emitting region of the OLED display panel.

2. The OLED display panel according to claim 1 , wherein the functional layer and the electroluminescent material layer are in the light emitting region, and wherein the OLED display panel further comprises:
an auxiliary electrode on the substrate and in the non-light emitting region,
wherein the auxiliary electrode is in direct electrical contact with the second electrode layer.

3. The OLED display panel according to claim 1 , wherein the functional layer further comprises one or more of a semiconductor layer, one or more insulating layers, a gate metal layer, a source-drain metal layer, a planarization layer, or a pixel defining layer.

4. The OLED display panel according to claim 1 , wherein the functional layer, the electroluminescent material layer, and the second electrode layer are in the light emitting region and the non-light emitting region.

5. The OLED display panel according to claim 2 , wherein the auxiliary electrode comprises a stack of electrically conductive material layers.

6. An electronic device comprising the OLED display panel according to claim 1 .

7. The electronic device according to claim 6 ,
wherein the functional layer and the electroluminescent material layer are in the light emitting region,
wherein the OLED display panel further comprises an auxiliary electrode on the substrate and in the non-light emitting region, and
wherein the auxiliary electrode is in direct electrical contact with the second electrode layer.

8. The electronic device according to claim 6 , wherein the functional layer further comprises one or more of a semiconductor layer, one or more insulating layers, a gate metal layer, a source-drain metal layer, a planarization layer, or a pixel defining layer.

9. The electronic device according to claim 6 , wherein the functional layer, the electroluminescent material layer, and the second electrode layer are in the light emitting region and the non-light emitting region.

10. The electronic device according to claim 7 , wherein the auxiliary electrode comprises a stack of electrically conductive material layers.

Assignees

• Hefei Xinsheng Optoelectronics Technology Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Sun Shi
• Xie Xuewu
• Liu Hao
• Liu Bowen
• Ai Yu
• Kong Yubao
• Zhang Ameng
• Xu Yang

Classifications

• H10K59/80522 Primary

  combined with auxiliary electrodes · CPC title

• H10K59/80521

  characterised by their shape · CPC title

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K71/60 Primary

  Forming conductive regions or layers, e.g. electrodes · CPC title

• H01L51/5012

  Electricity · mapped topic