Patent ID: 6762565
Filing Date: 2004-07-13
Classification: G09G

Abstract:
A power supply device for a display panel including a plurality of pixels, each pixel including a thin film transistor (TFT), for generating a gate-off voltage for turning off a gate of the TFT of the pixel, a gate-on voltage for turning on the gate of the TFT of the pixel, and a common voltage for driving of a common electrode common to the plurality of pixels, comprising:a set register for setting an amplitude value and a voltage level value of said common voltage and an amplitude value and a voltage level value of said gate-off voltage, the values being sent from an external processor when a power switch is turned on; a common voltage generating circuit for generating said common voltage from a reference voltage according to the set values of the amplitude and the voltage level of said common voltage; and a gate-off voltage generating circuit for generating said gate-off voltage from said reference voltage according to the set values of the amplitude and the voltage level of said gate-off voltage.