Patent ID: 7667808

Claim:
A method of driving a liquid crystal display (LCD) device, comprising: wherein the LCD device is one of an in plane switching mode and a fringe field switching mode, the LCD device having liquid crystal between upper and lower substrates includes first and second electrodes on the lower substrate to apply a first electric field to the liquid crystal, a third electrode on the upper substrate to apply a second field to the liquid crystal along with the first and second electrodes, providing a wide viewing angle mode, when the voltage of the third electrode on the upper substrate is the same as the voltage of the first electrode on the lower substrate, wherein upper, lower, left and right viewing angle characteristics provide the wide viewing angle mode: providing a narrow viewing angle mode, when the voltage of the third electrode on the upper substrate is higher than the voltage of the first electrode on the lower substrate, wherein the left and right viewing angle characteristics is deteriorated without changing upper and lower viewing angle characteristics at the narrow viewing angle mode; and switching the wide viewing angle mode and the narrow viewing angle mode by adjusting a voltage applied to the third electrode.