Back to results
US 8,013,818 B2Granted
Liquid crystal display device and method of driving the same
AssigneeLG Display Co., Ltd.
InventorSook Kyung You
Life of this patent
Estimating the term…
Abstract
A liquid crystal display device includes 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, and a liquid crystal layer between the first substrate and the second substrate.
Claims20
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.
8 more elements
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 first gamma reference voltage generator outputting a first gamma reference voltage;
- a second gamma reference voltage generator outputting a second gamma reference voltage;
- a data driver converting red, green and blue digital data signals from the timing controller into red, green and blue analog data signals using the first gamma reference voltage except the second gamma reference voltage and converting the white digital data signal from the timing controller into a white analog data signals using the second gamma reference voltage except the first gamma reference voltage, the data driver outputting the red, green, blue and 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.
8 more elements
A method of driving a liquid crystal display device, comprising:
- outputting a gate control signal, a data control signal and a digital data signal, the digital data signal including a red, green, blue and white digital data signals;
- adjusting a gray level of the white digital data signal except the red, green and blue digital data signals to output an adjusted white digital data signal;
- converting the red, green, blue and adjusted white digital data signals into red, green, blue and adjusted white analog data signals;
- supplying the red, green, blue and adjusted white analog data signals to data lines of a liquid crystal panel according to the data control signal;
- and
- supplying scan signals to a gate lines of the liquid crystal panel according to the gate control signal.
3 more elements
A method of driving a liquid crystal display device, comprising:
- outputting a gate control signal, a data control signal and a digital data signal, the digital data signal including a red, green, blue and white digital data signals;
- outputting first and second gamma reference voltages;
- converting red, green and blue digital data signals into red, green and blue analog data signals using the first gamma reference voltage except the second gamma reference voltage, and converting the white digital data signal into a white analog data signal using the second gamma reference voltage except the first gamma reference voltage;
- supplying the red, green, blue and white analog data signals to a data line of a liquid crystal panel according to the data control signal;
- and
- supplying scan signals to gate lines of the liquid crystal panel according to the gate control signal.
3 more elements
Dependencies are inferred from the claim text.