Organic light emitting display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-10084148-B2
Application number	US-201514963467-A
Country	US
Kind code	B2
Filing date	Dec 9, 2015
Priority date	Dec 12, 2014
Publication date	Sep 25, 2018
Grant date	Sep 25, 2018

Abstract

An organic light emitting display device includes: a substrate including a display area having a plurality of pixel regions and a non-display area; a first electrode on the substrate; a first organic emissive layer on the first electrode; a charge generation layer on the first organic emissive layer as a common layer for the plurality of pixel regions; a second organic emissive layer on the charge generation layer; a second electrode on the second organic emissive layer as a common electrode for the plurality of pixel regions; and an anti-contact layer between the charge generation layer and the second electrode as a common layer for the plurality of pixel regions. The anti-contact layer completely surrounds the charge generation layer.

First claim

What is claimed is:

1. An organic light emitting display device, comprising:
a substrate comprising:
a display area comprising a plurality of pixel regions; and
a non-display area;

a first electrode on the substrate;
a first organic emissive layer on the first electrode;
a charge generation layer on the first organic emissive layer as a common layer for the plurality of pixel regions;
a second organic emissive layer on the charge generation layer;
a second electrode on the second organic emissive layer as a common electrode for the plurality of pixel regions; and
a non-conductive anti-contact layer between the charge generation layer and the second electrode as a common layer for the plurality of pixel regions, the anti-contact layer completely surrounding the charge generation layer, the anti-contact layer comprising an organic material.

2. The organic light emitting display device of claim 1 , wherein the anti-contact layer prevents the charge generation layer from being in contact with the second electrode.

3. The organic light emitting display device of claim 1 , wherein the charge generation layer comprises:
an n-type charge generation layer; and
a p-type charge generation layer.

4. The organic light emitting display device of claim 3 , wherein the p-type charge generation layer is disposed on the n-type charge generation layer.

5. The organic light emitting display device of claim 1 , wherein the thickness of the anti-contact layer is equal to or larger than 10 Å.

6. The organic light emitting display device of claim 1 , wherein the anti-contact layer is one of: a hole transporting layer, a hole blocking layer, an electron transporting layer, an electron injection layer, and an electron blocking layer.

7. The organic light emitting display device of claim 6 , wherein the anti-contact layer is the electron transporting layer.

8. The organic light emitting display device of claim 1 , wherein the anti-contact layer is two or more of: a hole transporting layer, a hole blocking layer, an electron transporting layer, an electron injection layer, and an electron blocking layer.

9. The organic light emitting display device of claim 1 , wherein the anti-contact layer is only in the display area.

10. The organic light emitting display device of claim 1 , wherein the second electrode is in the display area and in a part of the non-display area.

11. The organic light emitting display device of claim 1 , wherein the second electrode completely surrounds the anti-contact layer.

12. A method of manufacturing an organic light emitting display device, the method comprising:
disposing a first electrode on a substrate comprising a display area having a plurality of pixel regions and a non-display area;
disposing a first organic emissive layer on the first electrode;
disposing a charge generation layer on the first organic emissive layer as a common layer for the plurality of pixel regions;
disposing a second organic emissive layer on the charge generation layer;
disposing a second electrode on the second organic emissive layer as a common layer for the plurality of pixel regions; and
prior to the disposing the second electrode, disposing a non-conductive anti-contact layer on the charge generation layer as a common layer for the plurality of pixel regions, the anti-contact layer completely surrounding the charge generation layer, the anti-contact layer comprising an organic material.

13. The method of claim 12 , wherein the disposing the charge generation layer and the disposing the anti-contact layer are performed by thermal evaporation.

14. The method of claim 12 , wherein:
the disposing the charge generation layer is performed using a first common mask; and
the disposing the anti-contact layer is performed using a second common mask.

15. The method of claim 14 , wherein an opening of the second common mask is larger than an opening of the second common mask.

16. The method of claim 14 , wherein:
the disposing the second electrode is performed using a third common mask; and
an opening of the third common mask is larger than the openings of the first and second common masks.

Assignees

• Lg Display Co Ltd

Inventors

• Kim Byungsoo
• Park Eunjung

Classifications

• H10K71/441

  in the presence of solvent vapors, e.g. solvent vapour annealing · CPC title

• H10K59/805

  Electrodes · CPC title

• H10K71/166

  using selective deposition, e.g. using a mask · CPC title

• H10K59/32 Primary

  Stacked devices having two or more layers, each emitting at different wavelengths · CPC title

• H01L51/56

  Electricity · mapped topic