Electronics and Telecommunications Research Institute

Konkuk University Industrial Cooperation Corp

Hong Kyun Leem

Byoung Gon Yu

Chi Sun Hwang

Ji Sun Kim

Sang Hee Park

Kee Chan Park

Him Chan Oh

Jae Eun Pi

Sung Min Yoon

Byeong Hoon Kim

Tao Ren

Min Woo Oh

Min Ki Ryu

Youn Kyung Kim

Joon Dong Kim

Disclosed is a DC voltage conversion circuit of a liquid crystal display apparatus, including: a main pumping circuit including a plurality of thin film transistors and configured to output voltage for driving a liquid crystal display apparatus when the plurality of thin film transistors are alternately turned on or off; and a switch control signal generator configured to control voltages applied to gates of the plurality of thin film transistors by inversion of a clock signal, in which each thin film transistor is turned on when positive gate-source voltage is applied thereto, and turned off when negative gate-source voltage is applied thereto.

DC voltage conversion circuit of liquid crystal display apparatus

Disclosed are an inverter, a NAND gate, and a NOR gate. The inverter includes: a pull-up unit constituted by a second thin film transistor outputting a first power voltage to an output terminal according to a voltage applied to a gate; a pull-down unit constituted by a fifth thin film transistor outputting a ground voltage to the output terminal according to an input signal applied to a gate; and a pull-up driver applying a second power voltage or the ground voltage to the gate of the second thin film transistor according to the input signal.

Inverter, NAND gate, and NOR gate

Growing community of inventors

Seoul, South Korea

Hong Kyun Leem