Lg Display Co., Ltd.

Other

Hong-Seok Choi

Chang-Wook Han

Sung-Hoon Pieh

Seung-Ryong Joung

Jun-ho Lee

Ki-Woog Song

Yoon-Deok Han

Gyeong-Woo Kim

Youn-Seok Kam

Seok-Joon Oh

Tae-Shick Kim

Jeong-Dae Seo

Byung-Chul Ahn

Shin-Han Kim

Hwa-Kyung Kim

Mi-Young Han

Ji-Seon Jang

Seung-Hyun Kim

Yoon-Heung Tak

Gwi-Jeong Cho

Hye-Min Oh

Hee-Su Byeon

Do-Hyung Kim

Hee-Dong Choi

Dong-Hyuk Kim

Sung-Joon Bae

Hee-Suk Pang

Seong-Su Jeon

Hyung-June Kim

So-Yeon Ahn

Jae-Man Lee

Chi-Yul Song

Tae-Sun Yoo

Ahn-Ki Kim

Sang-Hun Han

Disclosed are an organic light emitting device and a display device using the same in which a light emitting layer includes a host and a plurality of dopants. In the light emitting layer, energy is transferred from a host and other dopants to one dopant by energy transfer system, thus it is possible to increase luminous efficacy of a single color and to increase lifetime of emission.

Organic light emitting device and display device using the same

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

Discussed is an organic light emitting device in which a light emitting layer includes a host and different kinds of dopants, the fluorescent dopant is formed of a material having energy level properties facilitating thermally activated delayed fluorescence (TADF), and thus energy is concentratedly transferred to the fluorescent dopant so as to increase luminous efficacy of a single color.

Disclosed are a display panel which changes the inner structure of an organic light emitting stack and a color transmission structure so as to improve luminance, and a head mounted display device using the same.

Display panel and head mounted display device having the same

Disclosed is a display panel configured such that, in a structure in which the distance between a display surface and a viewer is short, the structure between a reflective plate and a first electrode (an anode) is changed such that light having three or more color peak properties for all subpixels is transmitted through a second electrode (a cathode), whereby white expression as well as color expression is possible, and a head mounted display device including the same.

Display panel and head mounted display device including the same

A head mounted display device comprises a display panel comprising first to third subpixels defined at a substrate, a reflection plate provided in the first, second and third subpixels, first electrodes vertically spaced apart from a lower surface of the reflection plate by a first distance, a second distance and a third distance at the first, second and third subpixels, respectively, a white organic stack on the first electrodes at the first, second and third subpixels, a second electrode on the white organic stack, and a first color filter on the second electrode at the third subpixel to transmit light having a long wavelength.

Head mounted display device and display panel included therein

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.

Disclosed herein is a white organic light emitting device including various emission layers with improved luminous efficiency, an increased color viewing angle, and low power consumption. The white organic light emitting device includes at least two charge generation layers and at least three stacks between a first electrode and a second electrode. The first stack includes an emission layer having a wavelength range of about 440 to about 470 nm, the second stack includes an emission layer having a wavelength range of about 530 to about 570 nm, and the third stack includes an emission layer having a wavelength range of about 590 to about 620 nm and an emission layer having a wavelength range of about 440 to about 470 nm.

White organic light emitting device

An organic electroluminescent device and organic electroluminescent display device having enhanced efficiency are discussed. In one example, the organic electroluminescent device includes first and second electrodes facing each other on a substrate and at least two emission layers formed between the first and second electrodes and realizing blue light, wherein, among the emission layers, a first blue emission layer close to the first electrode includes a first blue dopant having a different maximum luminescence wavelength than that of a second blue dopant of a second blue emission layer close to the second electrode.

Organic electroluminescent device and organic electroluminescent display device

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.

An organic light emitting diode display device includes a first substrate including a display area, wherein a plurality of pixels each including sub-pixels is defined in the display area; a switching thin film transistor and a driving thin film transistor in each of the sub-pixels over the first substrate; light-blocking patterns in at least one of the sub-pixels; a color filter layer in at least one sub pixel; a first passivation layer over the switching thin film transistor, the driving thin film transistor and the light-blocking patterns; a first electrode in each of the sub-pixels over the first passivation layer; an organic light emitting layer on the first electrode all over the display area; and a second electrode on the organic light emitting layer all over the display area.

Organic light emitting diode display device

An organic light emitting display device with enhanced luminous efficiency and color viewing angle and a method of manufacturing the same are disclosed. The method includes forming a first electrode of each of red, green, blue and white sub-pixels on a substrate, forming a white organic common layer on the first electrodes, and forming a second electrode on the white organic common layer, wherein the first electrodes each includes multiple transparent conductive layers and is formed such that a thickness of the first electrode of each of two sub-pixels among the red, green, blue and white sub-pixels is greater than a thickness of the first electrode of each of the other two sub-pixels, and at least two layers excluding the lowermost layer among the multiple transparent conductive layers of each first electrode are formed to cover opposite sides of the lowermost layer.

Growing community of inventors

Seoul, South Korea

Hong-Seok Choi