Lg Display Co., Ltd.

Samsung Sdi Co., Inc.

Yongjoong Choi

Kwanhee Lee

Ki-Woog Song

SoYeon Ahn

Taeil Kum

Mingyu Lee

Janghyuk Kwon

Jinwoung Jung

Taell Kum

Hyuneok Shin

An OLED apparatus that may include a reflection-anode, a transparent-cathode, and a plurality of stacks between the reflection-anode and the transparent-cathode, wherein, among the plurality of stacks, a thickness of the stack disposed relatively close to the transparent-cathode is larger than a thickness of the stack disposed relatively close to the reflection-anode so that it is possible to optimize a micro-cavity of light emitted from the plurality of stacks, thereby improving a light-emission efficiency and a color reproduction ratio and reducing a color change rate in accordance with a viewing angle.

Organic light emitting display apparatus

An organic electroluminescent (EL) device includes a substrate, a first anode formed on the substrate with a reflectivity of 60% or higher, a second anode formed on the first anode, wherein the second anode includes a conductive metal or an oxide thereof having a work function of 4.3 to 5.8 eV, an organic layer formed on the second anode, and a cathode formed on the organic layer.

Organic electroluminescent device employing multi-layered anode

Growing community of inventors

Seoul, South Korea

Yongjoong Choi