Patent ID: 8610705
Filing Date: 2013-12-17
Classification: G09G

Abstract:
1. An apparatus for driving a liquid crystal display device, the apparatus comprising: an image analyzer configured to compare a pattern of input image data with a plurality of stored patterns of image data, to determine a stored pattern of image data from the plurality of stored patterns of image data that is most similar to the pattern of the input image data, and to output a pattern analysis signal indicating the determined stored pattern, wherein the image analyzer generates synchronous signals by sequentially comparing the input image data with the stored patterns, counts the synchronous signals, and determines the most similar stored pattern of the input image data when a largest count number of the synchronous signals is generated for the most similar stored pattern, wherein the plurality of stored patterns of image data include at least one of a horizontal line pattern, a vertical 2-dot pattern, a vertical line pattern, and a horizontal 2-dot pattern; a dithering unit connected to the image analyzer and configured to select one set of a plurality of dithering pattern sets based on the output pattern analysis signal, to dither the input image data based on the selected dithering pattern set, and to output a dither-processed image data, wherein each of the plurality of dithering pattern sets includes a plurality of dithering patterns which are different by gray scales and by frames; and a data driver applying the dither-processed image data to a liquid crystal panel, wherein: the dithering unit selects a dither bit in the a plurality of dithering patterns, which are included in the dithering pattern set selected according to the pattern analysis signal, using low-order bits of the input image data and adds the selected dither bit to the input image data, the plurality of stored patterns of image data are different from the plurality of dithering patterns and are not used in the dithering unit, the pattern analysis signal is not added to the input image data, and the plurality of stored patterns of image data are used only in the image analyzer and are not applied to the data driver.