Lg Display Co., Ltd.

YoungKwan Jung

Seunghyun Kim

Heedong Choi

Disclosed is an organic light emitting display device. The organic light emitting display device includes a first emission part between a first electrode and a second electrode and a second emission part on the first emission part. The first emission part includes a first hole transport layer and a first emission layer, and the second emission part includes a second hole transport layer and a second emission layer. A thickness of the second hole transport layer is greater than a thickness of the first hole transport layer.

Organic light emitting display device for enhancing efficiency

Organic light emitting display device having hole transport layers with different thickness

Disclosed is an organic light emitting display (OLED) apparatus which facilitates to lower a driving voltage and to improve a lifespan by optimizing a balance of electrons and holes among a plurality of stacks, wherein the OLED apparatus may include the plurality of stacks disposed between an anode and a cathode, and a plurality of charge generation layers for supplying charges to the plurality of stacks, wherein a thickness of the charge generation layer disposed relatively close to the anode is relatively larger than a thickness of the charge generation layer disposed relatively close to the cathode.

Growing community of inventors

Paju-si, South Korea

YoungKwan Jung