Organic light emitting display device

Patent metadata

Field	Value
Publication number	US-9780325-B2
Application number	US-201414560537-A
Country	US
Kind code	B2
Filing date	Dec 4, 2014
Priority date	Dec 31, 2013
Publication date	Oct 3, 2017
Grant date	Oct 3, 2017

Abstract

Disclosed is an organic light emitting display device having excellent lifespan and current efficiency characteristics, as well as high luminance to provide increased resolution and improved reliability, and a method for manufacturing the same. The organic light emitting display device comprises a substrate having first, second, and third pixel regions; a first electrode arranged on the substrate; a second electrode arranged on the first electrode; and an organic layer arranged between the first electrode and the second electrode. The organic layer includes first, second and third organic layers on the first, second and third pixel regions, respectively. Each of the first, second and third organic layers includes a plurality unit organic layers and at least one charge generating layer arranged between the plurality of unit organic layers.

First claim

What is claimed is:

1. An organic light emitting display device comprising:
a substrate including a first pixel region, a second pixel region, and a third pixel region;
a first electrode on the substrate;
a second electrode on the first electrode; and
an organic layer between the first electrode and the second electrode,
wherein the organic layer includes a first organic layer in the first pixel region, a second organic layer in the second pixel region, and a third organic layer in the third pixel region, such that the first, second and third organic layers are arranged to correspond with the first, second and third pixel regions, respectively,
wherein the first organic layer includes a plurality of first unit organic layers, and a charge generating layer between the plurality of first unit organic layers,
wherein the second organic layer includes a plurality of second unit organic layers, and a charge generating layer between the plurality of second unit organic layers,
wherein the third organic layer includes a plurality of third unit organic layers, and a charge generating layer between the plurality of third unit organic layers,
wherein each of the first unit organic layers includes a hole transporting layer, a first light emitting layer, and an electron transporting layer,
wherein each of the second unit organic layers includes a hole transporting layer, a second light emitting layer, and an electron transporting layer,
wherein each of the third unit organic layers includes a hole transporting layer, a third light emitting layer, and an electron transporting layer, and
wherein the first organic layer emits red light, the second organic layer emits green light, and the third organic layer emits blue light.

2. The organic light emitting display device of claim 1 , wherein the first electrode is reflective, and the second electrode allows a portion of incident light to transmit through.

3. The organic light emitting display device of claim 1 , wherein the first organic layer has a thickness thicker than that of the second and the third organic layers, and the second organic layer has a thickness thicker than that of the third organic layer.

4. The organic light emitting display device of claim 1 , wherein the first unit organic layers have a thickness thicker than that of the second and the third unit organic layers, and the second unit organic layers have a thickness thicker than that of the third unit organic layers.

5. The organic light emitting display device of claim 1 , wherein the first light emitting layer has a thickness thicker than that of the second and the third light emitting layers, and the second light emitting layer has a thickness thicker than that of the third light emitting layer.

6. The organic light emitting display device of claim 1 , wherein the charge generating layer includes an N-charge generating layer and a P-charge generating layer, the N-charge generating layer includes an N-type dopant, and the P-charge generating layer includes a P-type dopant.

7. The organic light emitting display device of claim 1 , wherein the first unit organic layers further includes a hole injection layer and art electron injection layer, the second unit organic layers further includes a hole injection layer and an electron injection layer, and the third unit organic layers further includes a hole injection layer and an electron injection layer.

8. The organic light emitting display device of claim 1 , wherein at least one of the plurality of first, the second, and the third light emitting layers includes a host, which includes two materials, and a dopant.

9. The organic light emitting display device of claim 8 , wherein the two materials include arylamine derivative.

10. The organic light emitting display device of claim 8 , wherein the two materials include a material having hole mobility of a value between 1.0×10 −5 (cm 2 /Vs) and 1.0×10 −1 (cm 2 /Vs).

11. The organic light emitting display device of claim 1 , wherein one of the plurality of first light emitting layers includes a material having hole mobility of a value between 1.0×10 −5 (cm 2 /Vs) and 1.0×10 −1 (cm 2 /Vs).

12. The organic light emitting display device of claim 1 , wherein the device does not include a color filter.

Assignees

• Lg Display Co Ltd

Inventors

• Lee Se Hee

Classifications

• H01L51/0081

  Electricity · mapped topic

• H01L51/0085

  Electricity · mapped topic

• H01L51/5265

  Electricity · mapped topic

• H01L27/3211

  Electricity · mapped topic

• H01L51/5218 Primary

  Electricity · mapped topic