Patent ID: 8525766

Claim:
A method of driving a liquid crystal display device, which includes first and second substrates, gate lines on the first substrate, data lines crossing the gate lines to define pixel regions, a thin film transistor connected to each gate line and each data line, common lines between adjacent gate lines and alternating the gate lines, a pixel electrode in each pixel region and overlapping one of the common lines, and a common electrode on the second substrate, the method comprising: sequentially applying scanning signals to the gate lines; applying data signals to the data lines to supply the pixel electrode with pixel voltage; applying a common voltage to the common electrode; and applying a storage capacitor voltage to all the common lines, wherein the pixel voltage and the storage capacitor voltage are alternating current voltages having positive and negative polarities alternately with respect to the common voltage, wherein the storage capacitor voltage applied to one of the common lines has a same polarity as the storage capacitor voltage applied to another of the common lines next to the one of the common lines, wherein in one of the pixel regions, the pixel electrode short-circuits with a corresponding common line, and the storage capacitor voltage is applied to the short-circuited pixel electrode, and wherein the one of the pixel regions has different black color purity from others of the pixel regions when a black image is displayed and the one of the pixel regions becomes a dark defect, and wherein the pixel voltage is always higher than the storage capacitor voltage with respect to the common voltage when they both are in positive polarities and the pixel voltage is always lower than the storage capacitor voltage with respect to the common voltage when they both are in negative polarities.