POWER CIRCUIT FOR LIQUID CRYSTAL DISPLAY DEVICE AND A LIQUID CRYSTAL DISPLAY DEVICE INCLUDING THE SAME, CAPABLE OF OUTPUTTING A GATE VOLTAGE TO A GATE DRIVING UNIT THROUGH A CHARGE PUMP

摘要

PURPOSE: A power circuit for liquid crystal display device and a liquid crystal display device including the same are provided to reduce the voltage charged in a capacitor by using a gate low voltage as a power voltage. ;CONSTITUTION: In a power circuit for liquid crystal display device and a liquid crystal display device including the same, a gate wiring and a data line are formed in a liquid crystal panel. A gate driving unit outputs a gate voltage to a gate wiring. The power circuit comprises a charge pump part the input voltage(VIN) dropping an input voltage to output a gate low voltage to the gate driving unit. The charge pump unit includes first and second transistors(T1,T2) which are serially connected between an input terminal and a ground terminal. The charge pump includes first and second diodes which are serially connected between the output terminal of the charge pump and input terminal.;COPYRIGHT KIPO 2011