Apparatus and method for driving liquid crystal display device

An apparatus for driving an LCD device comprising:

• an LCD panel that includes red, green, blue and white sub-pixels;
• a data converter that is operative to convert input data of three colors into input data of four colors;
• a data driver that is operative to convert the input data of four colors into a video signal, and supply the video signal to each sub-pixel;
• a gate driver that supplies a scan pulse to each sub-pixel;
• a timing controller that is operative to arrange the input data of four colors for at least three sub-frames, supply the arranged data to the data driver, and generate a sub-frame control signal corresponding to each sub-frame;
• a backlight unit that includes at least one lamp and at least two LEDs;
• and
• a backlight controller that controls the backlight unit in accordance with the input data of three colors and the sub-frame control signal.

A method that drives an LCD device including an LCD panel provided with red, green, blue and white sub-pixels comprising:

• converting input data of three colors into input data of four colors;
• arranging the four-color data of each frame in four-color input data for at least three sub-frames, and supplying the arranged four-color data to the data driver, and generating a sub-frame control signal corresponding to each sub-frame;
• supplying a scan pulse to each sub-pixel;
• converting the four-color input data into a video signal, and supplying the video signal to each sub-pixel in synchronization with the four-color input data;
• and
• driving a backlight unit that has LEDs of at least five colors in accordance with the three-color input data and the sub-frame control signal, to thereby emit the light to the LCD panel.

A method for driving an LCD device including an LCD panel provided with red, green, blue and white sub-pixels comprising:

• converting input data of three colors into input data of four colors;
• arranging the four-color data of each frame in four-color input data for at least three sub-frames, and supplying the arranged four-color data to the data driver, and generating a sub-frame control signal corresponding to each sub-frame;
• supplying a scan pulse to each sub-pixel;
• converting the four-color input data into a video signal, and supplying the video signal to each sub-pixel in synchronization with the four-color input data;
• and
• driving backlight unit having at least one lamp and at least two LEDs in accordance with the three-color input data and the sub-frame control signal, to thereby emit the light to the LCD panel.