Organic light emitting display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9293732-B2
Application number	US-201314134447-A
Country	US
Kind code	B2
Filing date	Dec 19, 2013
Priority date	Jan 24, 2013
Publication date	Mar 22, 2016
Grant date	Mar 22, 2016

Abstract

An organic light emitting display device includes a first electrode, a second electrode facing the first electrode, an organic light emitting layer disposed between the first and second electrodes, a first auxiliary structure and a second auxiliary structure both of which are disposed between the first and second electrodes. The first electrode is disposed on a substrate having a first sub-pixel region, a second sub-pixel region and a third sub-pixel region. The organic light emitting layer includes a first organic light emitting layer, a second organic light emitting layer and a third organic light emitting layer. The first auxiliary structure includes a first doping pattern, a first resonance auxiliary pattern, a second doping pattern and a second resonance auxiliary pattern. The second auxiliary structure includes a third doping pattern, a third resonance auxiliary pattern, a fourth doping pattern and a fourth resonance auxiliary pattern.

First claim

What is claimed is:

1. An organic light emitting display device, comprising:
a first electrode disposed on a substrate having a first sub-pixel region, a second sub-pixel region and a third sub-pixel region;
a second electrode facing the first electrode;
an organic light emitting layer disposed between the first electrode and the second electrode, the organic light emitting layer including a first organic light emitting layer, a second organic light emitting layer and a third organic light emitting layer;
a first auxiliary structure disposed between the first electrode and the second electrode, the first auxiliary structure including a first doping pattern, a first resonance auxiliary pattern, a second doping pattern and a second resonance auxiliary pattern; and
a second auxiliary structure disposed between the first electrode and the second electrode, the second auxiliary structure including a third doping pattern, a third resonance auxiliary pattern, a fourth doping pattern and a fourth resonance auxiliary pattern.

2. The organic light emitting display device of claim 1 , further comprising an electron injection layer disposed between the organic light emitting layer and the second electrode.

3. The organic light emitting display device of claim 2 , further comprising an electron transfer layer disposed between the organic light emitting layer and the electron injection layer.

4. The organic light emitting display device of claim 1 , further comprising a hole injection layer disposed between the organic light emitting layer and the first electrode.

5. The organic light emitting display device of claim 4 , further comprising a hole transfer layer disposed between the organic light emitting layer and the hole injection layer.

6. The organic light emitting display device of claim 1 , wherein the first organic light emitting layer radiates blue light, the second organic light emitting layer radiates red light, and the third organic light emitting layer radiates green light.

7. The organic light emitting display device of claim 1 , wherein the first organic light emitting layer is disposed in the first sub-pixel region, the second sub-pixel region and the third sub-pixel region, the second organic light emitting layer is disposed in the first sub-pixel region to overlap the first organic light emitting layer, and the third organic light emitting layer is disposed in the second sub-pixel region to overlap the first organic light emitting layer.

8. The organic light emitting display device of claim 7 , wherein the first auxiliary structure is disposed between the first organic light emitting layer and the second organic light emitting layer.

9. The organic light emitting display device of claim 8 , wherein the first doping pattern is disposed to directly contact the first organic light emitting layer, and the second doping pattern is disposed between the first resonance auxiliary pattern and the second resonance auxiliary pattern.

10. The organic light emitting display device of claim 8 , wherein a ratio between a thickness of the first resonance auxiliary pattern and a thickness of the second resonance auxiliary pattern is about 2:1.

11. The organic light emitting display device of claim 8 , a ratio between a thickness of the first doping pattern and a thickness of the second doping pattern is about 1:2.

12. The organic light emitting display device of claim 7 , wherein the second auxiliary structure is disposed between the first organic light emitting layer and the third organic light emitting layer.

13. The organic light emitting display device of claim 12 , wherein the third doping pattern is disposed to directly contact the first organic light emitting layer, and the fourth doping pattern is disposed between the third resonance auxiliary pattern and the fourth resonance auxiliary pattern.

14. The organic light emitting display device of claim 12 , wherein a ratio between a thickness of the third resonance auxiliary pattern and a thickness of the fourth resonance auxiliary pattern is about 2:1.

15. The organic light emitting display device of claim 12 , wherein a ratio between a thickness of the third doping pattern and a thickness of the fourth doping pattern is about 1:2.

16. The organic light emitting display device of claim 1 , further comprising:
a thin film transistor electrically connected to the first electrode; and
a protection layer covering the second electrode.

17. A method of manufacturing an organic light emitting display device, the method comprising:
forming a first electrode on a substrate;
forming a first organic light emitting layer on the first electrode;
forming a first auxiliary structure on the first organic light emitting layer, the first auxiliary structure including a first doping pattern, a first resonance auxiliary pattern, a second doping pattern and a second resonance auxiliary pattern;
forming a second auxiliary structure on the first organic light emitting layer, the second auxiliary structure including a third doping pattern, a third resonance auxiliary pattern, a fourth doping pattern and a fourth resonance auxiliary pattern, the second auxiliary structure being disposed not to be overlapped with the first auxiliary structure; and
forming a second electrode to cover the first organic light emitting layer, the first auxiliary structure and the second auxiliary structure.

18. The method of claim 17 , further comprising forming an electron injection layer between the second electrode and the first organic light emitting layer.

19. The method of claim 17 , further comprising forming a hole injection layer between the first electrode and the first organic light emitting layer.

20. The method of claim 17 , wherein forming the first auxiliary structure includes forming the second doping pattern between the first resonance auxiliary pattern and the second resonance auxiliary pattern, and forming the second auxiliary structure includes forming the fourth doping pattern between the third resonance auxiliary pattern and the fourth resonance auxiliary pattern.

Assignees

• Samsung Display Co Ltd

Inventors

• Pyo Sang-Woo
• Yoon Ji-Hwan
• Song Ha-Jin
• Yoo Byeong-Wook
• Kim Hyo-Yeon

Classifications

• H10K59/876

  comprising a resonant cavity structure, e.g. Bragg reflector pair · CPC title

• H10K50/852

  comprising a resonant cavity structure, e.g. Bragg reflector pair · CPC title

• H10K50/17 Primary

  Carrier injection layers · CPC title

• H01L51/5088

  Electricity · mapped topic

• H01L27/3211

  Electricity · mapped topic