Patent ID: 7782283
Filing Date: 2010-08-24
Classification: G02F,G09G

Abstract:
1. An apparatus that drives an LCD device comprising: an LCD panel that includes red, green, blue and white sub-pixels; a data converter that converts 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 LEDs of at least five colors; and a backlight controller that controls the backlight unit in accordance with the input data of three colors and the sub-frame control signal, wherein the backlight unit includes: a plurality of LED arrays, each LED array provided with at least two of cyan, yellow and magenta LEDs, and three-color LEDs of red, green and blue colors; and an LED array driver that generates red, green and blue light emission signals to drive the three-color LEDs of red, green and blue colors in accordance with the three-color dimming signals, and generates at least two of cyan, yellow and magenta light emission signals to drive the at least two-color LEDs of cyan, yellow and magenta colors in accordance with the at least two-color dimming signals, so that a first sub-frame of one frame displays the three-color image by transmitting the white light generated from the three-color LEDs through the red, green, blue and white sub-pixels, a second sub-frame of one frame displays the first-color image by transmitting the first-color light generated from the first-color LED in the LEDs of two colors through the white sub-pixel, and a third sub-frame of one frame displays the second-color image by transmitting the second-color light generated from the second-color LED in the LEDs of two colors through the white sub-pixel.