Patent ID: 7522143

Claim:
A liquid crystal display device comprising: a liquid crystal display panel comprising a plurality of pixels which are formed in a region where a plurality of scan lines and a plurality of data lines cross each other and comprise optically compensated bend (OCB) liquid crystal cells each comprising a common electrode, a pixel electrode and OCB liquid crystals; a scan driver for applying scan signals for selecting the plurality of pixels through the plurality of scan lines; a source driver for sequentially applying a plurality of pulse waveforms to the plurality of pixels through the plurality of data lines; a backlight part for applying a light to the liquid crystal display panel; a backlight controller for applying a backlight voltage to the backlight part; and a timing controller for applying control signals for controlling operation of the scan driver, the source driver and the backlight controller, wherein the source driver comprises a memory in which gradation data values are stored in a lookup table, and which sequentially outputs a plurality of switching signals corresponding to a gradation data inputted; and a switching part to which the plurality of switching signals are applied to sequentially select a plurality of voltage levels, and wherein the switching part sequentially applies to the respective pixels a plurality of pulse waveforms corresponding to the selected plurality of voltage levels during one frame.