Lg Display Co., Ltd.

Lg Electronics Inc.

Sung Hoon Pieh

Ki-Woog Song

Seung Hyun Kim

Kyung Hoon Lee

Chang Wook Han

Hong Seok Choi

Jung Keun Kim

Chun Gun Park

So Yeon Ahn

Hyun Cheol Jeong

Jong Kwan Bin

Jeong Dae Seo

Se Ung Kim

Tae Shick Kim

Youn Seok Kam

Hyung June Kim

Seunghyun Kim

Hongseok Choi

Tae Seok Lim

Myung Seop Kim

Ki Dong Lee

Jae Man Lee

Sang Tae Park

Gyu Tae Kim

Eun Soo Cha

Chang Je Sung

Seh Won Ahn

Do Han Kim

Yong Kwan Kim

Byoung Ho Park

Sang Tae Lg Electronics Inc Ip Group Park

An organic light emitting display device comprises two emission portions between first and second electrodes, wherein at least one among the two emission portions includes two emitting layers, whereby efficiency and a color reproduction ratio may be improved.

Organic light emitting display device

A white organic light emitting device includes a first emission part between a first electrode and a second electrode, and configured to include a first emission layer, the first electrode being a reflective electrode, a second emission part on the first emission part, and configured to include a second emission layer, and a third emission part on the second emission part, and configured to include a third emission layer.

White organic light emitting device

Organic light emitting display device with two emission portions

Discussed is a white organic light emitting device for enhancing emission efficiency and panel efficiency. The white organic light emitting device can include a first emission part between a first electrode and a second electrode and configured to include a first emission layer (EML), a second emission part on the first emission part and configured to include a second EML, and a third emission part on the second emission part and configured to include a third EML. The first to third emission parts have an emission position of emitting layers (EPEL) structure in which the first to third emission parts have a maximum emission range in respective emission areas of the first to third EMLs.

An organic light emitting display device comprises first and second electrodes facing each other on a substrate; and three emission portions arranged between the first electrode and the second electrode, wherein at least one among the three emission portions includes two emitting layers, and the first, second and third emission portions being collectively configured as a TOL-FESE (Thickness of Organic Layers between the First Electrode and the Second Electrode) structure in which thicknesses of organic layers between the first electrode and the second electrode are different from one another, each organic layer having a specified thickness that provides the organic light emitting display device having the TOL-FESE structure with improved red efficiency or blue efficiency and minimized color shift rate with respect to a viewing angle, when compared to an organic light emitting display device that lacks the TOL-FESE structure.

Disclosed herein are red phosphorescent compounds of the following formula:   

Red phosphorescent compounds and organic electroluminescent devices using the same

The invention relates to a red phosphorescent compound represented by the following Formula (1) and an organic electroluminescent (EL) device using the same: wherein 

Red phosphorescent compound and organic electroluminescent device using the same

A red phosphorescent compound of Formula I:   and R1, R2, R3, R4 and R5 are as defined in the specification.

Disclosed herein is a red phosphorescent compound of the following Formula 1:  is includes a phenyl part and a quinoline part, the quinoline part has one substituent selected from a C-Calkoxy group and the phenyl part has substituents independently selected from hydrogen, C-Calkyl groups and C-Calkoxy groups, and is selected from 2,4-pentanedione, 2,2,6,6-tetramethylheptane-3,5-dione, 1,3-propanedione, 1,3-butanedione, 3,5-heptanedione, 1,1,1-trifluoro-2,4-pentanedione, 1,1,1,5,5,5-hexafluoro-2,4-pentanedione, and 2,2-dimethyl-3,5-hexanedione.

Disclosed herein are red phosphorescent compounds of the following one of Formulas 1 to 3  R1 and R2 are independently a C-Calkyl group, R3, R4, R5 and R6 are independently selected from hydrogen, C-Calkyl groups and C-Calkoxy groups, R1, R2, R3 and R4 are independently selected from C-Calkyl groups and C-Calkoxy groups, R1, R2, R3 and R4 are independently selected from hydrogen, C-Calkyl groups and C-Calkoxy groups, and is selected from 2,4-pentanedione, 2,2,6,6,-tetramethylheptane-3,5-dione, 1,3-propanedione, 1,3-butanedione, 3,5-heptanedione, 1,1,1-trifluoro-2,4-pentanedione, 1,1,1,5,5,5-hexafluoro-2,4-pentanedione and 2,2-dimethyl-3,5-hexanedione.

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Seoul, South Korea

Sung Hoon Pieh