LIQUID CRYSTAL DISPLAY DEVICE AND DRIVING METHOD THEREFOR

摘要

Disclosed is a liquid crystal display device provided with a monolithic gate driver, wherein residual charge in a pixel formation portion can be rapidly eliminated when the power is turned off. In a bistable circuit which constitutes a shift register in a gate driver (24), a thin-film transistor having a drain terminal connected to a gate bus line, a source terminal connected to a reference potential line for transmitting a reference potential (H_SIG_VSS), and a gate terminal to which a clock signal (HCK_1, HCK_2) for operating the shift register is given is provided. When a power OFF detection unit (17) detects the cutoff of the supply of power-supply voltage (PW) from the outside, the clock signal (HCK_1, HCK_2) is driven high to turn the thin-film transistor on, and a reference potential switching circuit (19) switches the reference potential (H_SIG_VSS) from a gate off potential (VGL) to a gate on potential (VGH).