Lg Display Co., Ltd.

Ki-Woog Song

Sung-Hoon Pieh

Sung Hoon Pieh

Chang Wook Han

Chang-Wook Han

Hong-Seok Choi

Youn-Seok Kam

Seung Hyun Kim

Hong Seok Choi

So Yeon Ahn

Seok-Joon Oh

Jeong-Dae Seo

Seung Kyun Kim

Taeil Kum

Tae-Shick Kim

Se Ung Kim

Tae Shick Kim

Youn Seok Kam

Hyung June Kim

Heedong Choi

HyungJune Kim

Tae-Il Kum

JeongHaeng Heo

Hyung-June Kim

Jaeseung Jang

Do Hyung Kim

Dohan Kim

Hongseok Choi

Do-Han Kim

Yoon Heung Tak

Dong-Hyuk Kim

Taeshick Kim

Jungkeun Kim

Seongsu Jeon

Mi-Young Han

Seon-Keun Yoo

Hyeseung Kang

Seung-Ryong Joung

SeungRyong Joung

SoYeon Ahn

Seung Kyeom Kim

Chang-Oh Kim

Hwa Kyung Kim

Hye-Seung Kang

Younseok Kam

Mingyu Lee

So-Yeon Ahn

Young-Kwan Jung

Hye Min Oh

Jungsoo Park

Min-Gyu Lee

Sunghoon Pieh

Taewoo Jeon

Ji-Young Kim

Yongjoong Choi

Sung-Jae Ko

Tae-Seok Lim

Taell Kum

Jimin Kim

Seungryong Joung

An organic light emitting display device includes a first electrode and a second electrode disposed on a substrate opposite to each other, a first stack including a hole injection layer, a first hole transport layer, a first light emitting layer, and a first electron transport layer sequentially stacked on the first electrode, a second stack including a second hole transport layer, a second light emitting layer, and a second electron transport layer sequentially stacked between the first stack and the second electrode, and a charge generation layer disposed between the first stack and the second stack and including an N-type charge generation layer and a P-type charge generation layer to control charge balance between the first and second stacks. The P-type charge generation layer is doped with 1% to 20% of a hole transport material based on a volume of the P-type charge generation layer.

Organic light emitting display device

An organic electroluminescence device including an anode, a cathode and a light-emission layer. The light-emission layer includes a stack of a blue light-emission layer and a red/green light concurrent-emission sub-stack. Further, the red/green light concurrent-emission sub-stack includes a stack of a red light-emission layer and a green light-emission layer. The red light-emission layer contains a red host compound including an arylamino group-substituted spirobisfluorene compound. Further, the green light-emission layer contains a green host compound including a mixture between a first green host compound and a second green host compound. Also, the first green host compound includes a bis-carbazole based compound, and the second green host compound includes a carbazole-based compound.

Organic electroluminescence device

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.

A white organic light emitting diode (OLED) includes a first electrode and a second electrode facing each other; a first charge generation layer and a second charge generation layer between the first and second electrodes; a first light emitting unit including a first emitting material layer emitting a first color, wherein the first light emitting unit is located between the first electrode and the first charge generation layer; a second light emitting unit including a second emitting material layer emitting a second color, wherein the second light emitting unit is located between the first charge generation layer and the second charge generation layer; and a third light emitting unit including a third emitting material layer emitting the second color, wherein the third light emitting unit is located between the second charge generation layer and the second electrode.

White organic light emitting diode and display device using the same

Disclosed are a tandem white organic light emitting diode with long lifespan and low driving voltage, and a display device including the same. The white organic light emitting diode includes a first light emitting part, a second light emitting part and a third light emitting part disposed between a first electrode and a second electrode. The first and third light emitting parts include a blue light emitting layer and the second light emitting part includes a red light emitting layer and a yellow-green light emitting layer. At least one layer of the red light emitting layer and the yellow-green light emitting layer includes a hole transport host based on a compound shown below: wherein each of R, R, and Rare independently selected from hydrogen, heavy hydrogen, a C5-C7 aromatic cyclic and C1-C6 heterocyclic group.

White organic light emitting diode and display including the same

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

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, a second emission part on the first emission part, and a first charge generation layer and a second charge generation layer between the first emission part and the second emission part. The first emission part includes a first organic layer, and the second emission part includes a second organic layer. A first thickness includes the first emission part and the first charge generation layer, and a second thickness includes the second emission part and the second charge generation layer. The first thickness is equal to or greater than the second thickness.

Organic light emitting display device with first to third emission parts

An organic light emitting display device includes a first electrode and a second electrode on a substrate, the first electrode being opposite to the second electrode; and at least one emission part between the first electrode and the second electrode, the at least one emission part including at least one organic layer, wherein the at least one organic layer comprises a peak wavelength of electroluminescence (EL) spectrum (PWES) structure where a moving range of a peak wavelength of an EL spectrum emitted from the at least one emission part is set.

Organic light emitting display device with two emission portions

An organic light emitting display device includes first and second electrodes facing each other on a substrate, a charge generation layer formed between the first and second electrodes, a first light emitting stack formed between the charge generation layer and the first electrode, and a second light emitting stack formed between the charge generation layer and the second electrode, wherein a hole injection layer of a light emitting stack to realize blue color of the first and second light emitting stacks is formed by doping a host formed of hexaazatriphenylene (HAT-CN) with 0.5% to less than 10% of a dopant formed of a hole transporting material based on a volume of the hole injection layer.

An organic light emitting device includes a first emitting part on an anode, the first emitting part including a first emission layer and a first hole transport layer a second emitting part on the first emitting part, the second emitting part including a second emission layer and a second hole transport layer; a third emitting part on the second emitting part including a third emission layer and a third hole transport layer; and a cathode on the third emitting part. The third emitting part further includes a fourth emission layer to emit light having a same color as the third emission layer and includes a dopant and a mixed host of at least two hosts, and a fourth hole transport layer provided on the third hole transport layer while in contact with the third emission layer, and has a hole mobility lower than that of the third hole transport layer.

Organic light emitting device

Growing community of inventors

Goyang-si, South Korea

Ki-Woog Song