LAMP DRIVING CIRCUIT OF A LIQUID CRYSTAL DISPLAY DEVICE, CAPABLE OF CONTROLLING THE BRIGHTNESS OF A LAMP ACCORDING TO A PWM METHOD BASED ON A SAW TOOTH OSCILLATION SIGNAL, AND A DRIVING METHOD THEREOF

摘要

PURPOSE: A lamp driving circuit of a liquid crystal display device and a driving method thereof are provided to prevent the deterioration of image quality by removing the afterimage of a previous picture after uniformly delaying the lighting of a lamp from the generation time point of a vertical synchronization signal.;CONSTITUTION: A liquid crystal panel(110) includes a pixel pattern which is arranged in a matrix form. A gate driving part(120) sequentially applies a gate voltage to a plurality of gate lines. A data driving part(130) applies a data voltage for the display of an image to a plurality of data lines. A lamp(140) can be used as the light source of a liquid crystal display device. An inverter device(150) generates a driving signal for a lamp.;COPYRIGHT KIPO 2011