Method of driving liquid crystal display device using alternating current voltages as storage capacitor voltage

A method of driving a liquid crystal display device, which includes first and second substrates, first and second gate lines on the first substrate, a data line crossing the first and second gate lines to define first and second pixel regions, first and second thin film transistors connected to the first gate line and the data line and to the second gate line and the data line, respectively, first and second common lines alternating the first and second gate lines, first and second pixel electrodes in the first and second pixel regions, respectively and overlapping the first and second common lines, respectively, and a common electrode on the second substrate, the method comprising:

• sequentially applying scanning signals to the first and second gate lines;
• applying data signals to the data line to supply the first and second pixel electrodes with pixel voltages;
• applying a common voltage to the common electrode;
• and
• applying a storage capacitor voltage to the first and second 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 the first common line has a same polarity as the storage capacitor voltage applied to the second common line,
• 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.