Organic light emitting device, display device having the same, and method of manufacturing display device

Patent metadata

Field	Value
Publication number	US-10002912-B2
Application number	US-201615250959-A
Country	US
Kind code	B2
Filing date	Aug 30, 2016
Priority date	Sep 22, 2015
Publication date	Jun 19, 2018
Grant date	Jun 19, 2018

Abstract

An organic light emitting device includes four sub-organic light emitting devices. The first device includes a first anode, a first common light emitting portion, and a first sub-light emitting portion. The second device includes a second anode, a second common light emitting portion, a first auxiliary layer, and a second sub-light emitting portion. The third device includes a third anode and a third common light emitting portion. The fourth device includes a fourth anode, a fourth common light emitting portion, and a light emitting layer emitting a first light. The first and second sub-light emitting portions have an integral structure and emit second light. The first, second, third, and fourth common light emitting portions have an integral structure and emit third light having a wavelength longer than a wavelength of at least one of the first or second lights.

First claim

What is claimed is:

1. A display device, comprising:
a base substrate including a first light emitting area, a second light emitting area, a third light emitting area, and a fourth light emitting area which are spaced apart from each other;
a first common light emitting layer in the first light emitting area, the second light emitting area, the third light emitting area, and the fourth light emitting area and provided as a single structure;
a second common light emitting layer in the first light emitting area and the second light emitting area, provided on the first common light emitting layer, and provided as a single structure;
a first auxiliary layer in the second light emitting area and between the first common light emitting layer and the second common light emitting layer or on the second common light emitting layer; and
a light emitting layer in the fourth light emitting area and on the first common light emitting layer to emit a first light, wherein the second common light emitting layer emits a second light and wherein the first common light emitting layer emits a third light having a wavelength longer than a wavelength of at least one of the first or second lights.

2. The display device as claimed in claim 1 , wherein the first common light emitting layer is on substantially an entire surface of the base substrate.

3. The display device as claimed in claim 1 , wherein:
the first light is in a wavelength range of about 620 nm to about 750 nm,
the second light is in a wavelength range of about 440 nm to about 490 nm, and
the third light is in a wavelength range of about 495 nm to about 570 nm.

4. The display device as claimed in claim 1 , wherein:
the first light emitting area emits light in a wavelength range of about 440 nm to about 458 nm,
the second light emitting portion emits light in a wavelength range of about 459 nm to about 490 nm,
the third light emitting portion emits light in a wavelength range of about 495 nm to about 570 nm, and
the fourth light emitting portion emits light in a wavelength range of about 620 nm to about 750 nm.

5. The display device as claimed in claim 1 , further comprising:
a second auxiliary layer in the fourth light emitting area and between a common light emitting portion and the light emitting layer or on the light emitting layer.

6. The display device as claimed in claim 1 , further comprising:
an intermediate layer in the first light emitting area and the second light emitting area, between the first common light emitting layer and the second common light emitting layer or on the second common light emitting layer, and provided as a single structure.

7. The display device as claimed in claim 1 , further comprising:
a hole transport region in the first light emitting area, the second light emitting area, the third light emitting area, and the fourth light emitting area, between the base substrate and the first common light emitting layer, and provided as a single structure.

8. The display device as claimed in claim 7 , wherein the hole transport region includes:
a hole injection layer on the base substrate, and
a hole transport layer on the hole injection layer,
wherein at least a portion of the hole transport layer includes a p-type dopant.

9. The display device as claimed in claim 1 , further comprising:
an electron transport region in the first light emitting area, the second light emitting area, the third light emitting area, and the fourth light emitting area, provided on the first common light emitting layer, the second common light emitting layer, and the light emitting layer, and provided as a single structure.

10. The display device as claimed in claim 9 , wherein the electron transport region includes:
an electron transport layer on the first common light emitting layer, the second common light emitting layer, and the light emitting layer; and
an electron injection layer on the electron transport layer.

11. The display device as claimed in claim 1 , wherein:
in a first mode, light is emitted from each of the first, second, third, and fourth light emitting areas,
in a second mode, light is emitted from each of the first, third, and fourth light emitting areas and is not emitted from the second light emitting area, and
in a third mode, light is emitted from each of the second, third, and fourth light emitting areas and is not emitted from the first light emitting area.

Assignees

• Samsung Display Co Ltd

Inventors

• Song Aree
• Won Byeong-Hee
• Park Wonsang
• Baek Jongin

Classifications

• H01L51/504

  Electricity · mapped topic

• H01L27/3218

  Electricity · mapped topic

• H01L27/3213 Primary

  Electricity · mapped topic

• H01L51/5265

  Electricity · mapped topic

• H10K59/876

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