ORGANIC LIGHT EMITTING DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAME

• US 20160172616A1
• Filed: 12/09/2015
• Published: 06/16/2016
• Est. Priority Date: 12/12/2014
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: PARK, EunJung, KIM, Byungsoo
• Granted Patent: US 10,084,148 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H10K 50/15 Hole transporting layers
• CPC Class Codes: H10K 50/16 Electron transporting layers
• CPC Class Codes: H10K 50/19 Tandem OLEDs
• CPC Class Codes: H10K 50/822 characterised by their shape
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/40 Thermal treatment, e.g. annealing in the presence of a solvent vapour

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.

Claims

1. An organic light emitting display device, comprising:

a substrate comprising 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, wherein the anti-contact layer completely surrounds the charge generation layer.

2. The organic light emitting display device of claim 1, wherein the anti-contact layer avoids 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, 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; and

disposing a second electrode on the second organic emissive layer as a common layer for the plurality of pixel regions, the method comprising;

prior to the disposing the second electrode, disposing an anti-contact layer on the charge generation layer as a common layer for the plurality of pixel regions,

wherein the anti-contact layer completely surrounds the charge generation layer.

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.