Patent ID: 7679589

Claim:
A liquid crystal display device comprising: a liquid crystal display panel comprising a plurality of pixels which are located at a region where a plurality of scan lines and a plurality of data lines cross each other, each pixel 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 applying data voltages to the plurality of pixels through the plurality of data lines; a backlight part for applying a light source 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 D/A converter for outputting an analog signal corresponding to gradation data input, a triangular wave generator for outputting triangular wave signals, and a comparator for generating the data voltages to be applied to the plurality of pixels without using an amplifier by comparing the analog signal with the triangular wave signals.