Patent ID: 8013818

Claim:
A liquid crystal display device, comprising: a first substrate and a second substrate facing and spaced apart from each other; a gate line and a data line on the first substrate, the gate line and the data line crossing each other to define red, green, blue and white sub-pixel regions; a thin film transistor connected to the gate line and the data line; a color filter layer consisting of red, green and blue color filters on the second substrate, the red, green and blue color filters corresponding to the red, green and blue sub-pixel regions, respectively; a liquid crystal layer between the first substrate and the second substrate; a timing controller outputting digital data signals, a gate control signal, and a data control signal, the digital data signals including red, green, blue and white digital data signals; a gray level adjuster for adjusting a gray level of the white digital data signal and outputting an adjusted white digital data signal; a data driver converting red, green and blue digital data signals from the timing controller and the adjusted white digital data signal from the gray level adjuster into red, green, blue and adjusted white analog data signals, and outputting the red, green, blue and adjusted white analog data signals to the data line according to the data control signal; and a gate driver outputting a scan signal to the gate line according to the gate control signal, wherein the white digital data signal except the red, green and blue digital data signals is adjusted by the gray level adjuster.