Lg Display Co., Ltd.

Chi-Yul Song

Tae-Shick Kim

Hong-Seok Choi

Shin-Han Kim

Hwa-Kyung Kim

Mi-Young Han

Youn-Seok Kam

Seong-Su Jeon

Gwi-Jeong Cho

Hye-Min Oh

Disclosed is an organic light emitting display device with an enhanced light emission efficiency at high current and an enhancement in panel efficiency through prevention of a roll-off phenomenon. The organic light emitting display device includes first and second electrodes formed on a substrate facing each other. A hole injection layer, a hole transport layer, at least first and second light emitting layers, and an electron transport layer are sequentially stacked between the first and second electrodes. The first light emitting layer includes different hosts while being doped with the same dopant in different dosages. The first light emitting layer includes a first host and a second host, and the second light emitting layer includes the first host and a third host different from the second host. The first and second light emitting layers are doped with the same phosphorescent yellow-phosphorescent green dopant in the same dosage.

Organic light emitting display device

Growing community of inventors

Incheon, South Korea

Chi-Yul Song