Patent ID: 8149196
Filing Date: 2012-04-03
Classification: G09G

Abstract:
1. An apparatus for driving a display device, the display device including a panel having sub-pixels of four colors, the apparatus comprising: a data driver for supplying video data signals to the respective sub-pixels; a gate driver for supplying scan signals to the respective sub-pixels; a data converter for extracting a plurality of white color signals by using three-color source data, and for generating white color data based upon a selection signal, so as to convert the three-color source data to four-color data; and a timing controller for supplying the four-color data outputted from the data converter to the data driver, and controlling the gate driver and the data driver, wherein the data converter includes: a reverse gamma correction part for generating three-color corrected data by performing reverse gamma correction on the three-color source data; a luminance detection part for detecting a maximum luminance value and a minimum luminance value from the three-color corrected data; a minimum value calculation part for generating the plurality of white color signals by using the minimum luminance value; a white color selection part for selecting one of the minimum luminance value and the plurality of white color signals as white color extraction data based upon the selection signal; a multiplication part for generating compensated white color extraction data based on the white color extraction data and generating first three-color data by multiplying the three-color corrected data and the compensated white color extraction data, the compensated white color extraction being obtained by multiplying the white color extraction data and a weight factor for each of red, green and blue colors respectively; a division part for generating second three-color data by dividing the first three-color data by the maximum luminance value; a color correction part for generating first four-color data by using the white color data, the three-color corrected data and the second three-color data; and a gamma conversion part for generating the four-color data by performing gamma correction on the first four-color data and supplying the four-color date to the timing controller.