Lg Display Co., Ltd.

Lg Electronics Inc.

Skhynix Inc.

Seoul National University

Goldstar Electron Co., Ltd.

Ls Cable & System Ltd.

Hong Seok Choi

Chang Wook Han

So Yeon Ahn

Hwa Kyung Kim

Seung Hyun Kim

Ki-Woog Song

Sung Hoon Pieh

Deog-Kyoon Jeong

Cheol-Hwan Kim

Myung-Seok Park

Jae Il Song

Yong-Jun Hwang

Hyungrok Do

Seong-Geun Heo

Kyu-Jung Kim

Myeong-Ho Lee

Hye Min Oh

Mi Young Han

Shin Han Kim

Tae-Hee Cho

Tae Sun Yoo

Jung Park

Seung-Tae Ko

Min Gyu Lee

Seung Ryong Joung

Byung Chul Ahn

Shinji Takasugi

Yoon Heung Tak

Woo Jin Nam

Jeongho Hwang

Chang Nam Kim

Hong Rae Cha

Byung Gil Ryu

Cheol Hwan Kim

Myeong Soo Chang

Young Soo Han

Kyung Ku Kim

SoYeon Ahn

Sam Chul Ha

Ho Nyun Lee

Chong Hyun Park

Jae Woo Kyung

Chun Ki Kim

Myung Jong Jung

Jae Young Yang

Young Hoon Yang

Kyung Hoon Han

Myung Seok Park

Myeong Ho Lee

Seoug Geum Heo

Seung Tae Ko

Seong-Tae Ko

Ahn Ki Kim

Tae Hee Cho

Hoon Chul Yang

Hyun Joo Hwang

Hong Keun Park

Min Su Kang

A light-emitting device includes a light-emitting layer between a first electrode and a second electrode, he light emitted from the light-emitting device may display a white color, the light-emitting layer may include a plurality of emission stacks, each of the emission stacks includes at least one emission material layer, one of the emission stacks may include a stacked structure of a red emission material layer and a blue emission material layer, thus improving the white balance and increasing color viewing angle.

Display apparatus having light-emitting device

A driving circuit includes an input circuit slice configured to convert a data signal into a first data signal and a second data signal having different DC components. The driving circuit also includes a driver slice configured to output driving current at an output node by generating push current or pull current according to the first data signal and the second data signal, wherein a magnitude of the push current or the pull current is variable.

Driving circuit and an optical transmitter including the same

A semiconductor memory device includes a memory cell array including one or more memory cells each coupled between a wordline and a bitline, a sense amplifier configured to amplify a voltage of a global wordline, a wordline decoder including a plurality of wordline switches coupling the wordline and the global wordline, and a control circuit configured to control the wordline decoder and the sense amplifier.

Semiconductor memory device including a control circuit for controlling a read operation

A semiconductor memory device includes a bitline driver configured to drive a global bitline; a memory cell array including a first memory cell that is coupled between a cell wordline and a cell bitline; a bitline decoder including a bitline switch that couples the global bitline and the cell bitline; a wordline decoder including a wordline switch that couples a global wordline and the cell wordline; a sense amplifier configured to output a sensing signal corresponding to a state of the first memory cell based on a voltage of the global bitline; and a control circuit configured to control the bitline driver, the bitline decoder, the wordline decoder and the sense amplifier during a first read operation for the first memory cell.

Semiconductor memory device for reducing snapback current of non-volatile memory during read operation

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.

Organic light emitting display device

A data serialization circuit includes a clock data operation circuit configured to generate a plurality of delay clock signals and a plurality of synchronous data signals in response to a plurality of parallel data signals and a plurality of multi-phase clock signals and a multiplexer configured to output a serial data signal in response to the plurality of delay clock signals and the plurality of synchronous data signals. A first one of the plurality of delay clock signals substantially aligns with a first one of the plurality of synchronous data signals.

Data serialization circuit

An organic light emitting device can include first and second electrodes formed to face each other on a substrate; a first stack interposed between the first and second electrode and configured with a hole injection layer, a first hole transportation layer, a first light emission layer and a first electron transportation layer which are stacked on the first electrode; a second stack interposed between the first stack and the second electrode and configured with a second hole transportation layer, a second light emission layer, a third light emission layer and a second electron transportation layer which are stacked on the first stack; a third stack interposed between the second stack and the second electrode and configured with a third hole transportation layer, a fourth light emission layer, a third electron transportation layer and an electron injection layer which are stacked on the second stack; and a first charge generation layer interposed between the first and second stacks and a second charge generation layer interposed between the second and third stacks.

White organic light emitting device

Provided are a method of manufacturing an organic light emitting display device and an organic light emitting display device manufactured by the method. The method includes calculating a peak-luminance current density for each of a red sub-pixel, a blue sub-pixel, a green sub-pixel, and a white sub-pixel, calculating an average use current density for each of the red sub-pixel, blue sub-pixel, green sub-pixel, and white sub-pixel; determining a size of each sub-pixel with the peak-luminance current density and the average use current density, and forming the sub-pixels with the determined sizes of the respective sub-pixels. The present invention sets the size of each sub-pixel in consideration of a peak-luminance current density and an average use current density, thus easily achieving the peak luminance and enhancing the color-coordinate life.

Organic light emitting display device and method of manufacturing the same

Organic light emitting display device with two emission portions

Disclosed is a white organic light emitting device. The white organic light emitting 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 third emission part on the second emission part. At least one of the first to third emission parts includes at least two emission layers including a red emission layer, and a position of the red emission layer is set to enhance a color reproduction rate and at least one of red efficiency, green efficiency, and blue efficiency.

A white organic light emitting device can include first and second electrodes on a substrate; a first stack configured with a hole injection layer, a first hole transportation layer, a first light emission layer and a first electron transportation layer which are stacked on the first electrode; a second stack configured with a second hole transportation layer, a second light emission layer, a third light emission layer, and a second electron transportation layer which are stacked on the first stack; a third stack interposed between the second stack and the second electrode and configured with a third hole transportation layer, a fourth light emission layer, a third electron transportation layer and an electron injection layer which are stacked on the second stack; and charge generation layers interposed between the first and second stacks and between the second and third stacks and configured to adjust a charge balance between the stacks.

Growing community of inventors

Seoul, South Korea

Hong Seok Choi