Patent ID: 8482501

Claim:
A liquid crystal display device comprising: an upper substrate on which an upper substrate common electrode is disposed, a lower substrate parallel to the upper substrate on which a pixel electrode is disposed, and a liquid crystal layer sandwiched between the upper substrate and the lower substrate, and liquid crystal molecules are arranged perpendicular to the upper substrate in substance when no voltage is applied, wherein dielectric anisotropy of the liquid crystal molecules is negative, wherein a plurality of parallel strip-like lower substrate common electrodes are disposed on the lower substrate, wherein the liquid crystal display device is adapted to perform a first viewing angle mode by applying a voltage between the upper substrate common electrode and the pixel electrode to generate an electric field perpendicular to the upper substrate, wherein the liquid crystal display device is adapted to perform a second viewing angle mode by applying a voltage between the lower substrate common electrode and the pixel electrode to generate an electric field perpendicular to the upper substrate and an electric field parallel to the upper substrate, and wherein viewing direction in the first viewing angle mode is perpendicular to that in the second viewing angle mode.