DRIVING VOLTAGE PRODUCING MODULE AND LIQUID CRYSTAL DISPLAY HAVING THE SAME

摘要

A module for generating a driving voltage and an LCD device having the same are provided to improve degradation of image quality by minimizing a kick-back voltage of a liquid crystal capacitor using a compensated common voltage. An LCD(Liquid Crystal Display) device includes plural pixels having a liquid crystal capacitor connected to a TFT(Thin Film Transistor). A module for generating a driving voltage for driving the pixels includes a common voltage generating unit(420) for generating a common voltage(Vcom) supplied to the liquid crystal capacitor using a predetermined clock signal and a predetermined reference voltage. The common voltage generating unit varies the common voltage value, which is output according to an average grayscale value of grayscale data corresponding to the pixels.