Patent ID: 7403182
Filing Date: 2008-07-22
Classification: G09G

Abstract:
1. A liquid crystal display comprising: a signal controller comprising a logic circuit and a multilevel graying unit, the logic circuit classifying n-bit source image data into at least two sections by dividing grays and correcting the n-bit source image data into m-bit first corrected data based on gamma correction data predetermined by gamma characteristics of the n-bit source image data for each of the at least two sections, the multilevel graying unit converting the m-bit first corrected data into second corrected data with a bit number equal to or less than the n bits of the source image data; a data driver outputting data voltages corresponding to the second corrected data from the signal controller; and a memory storing a parameter for correcting the n-bit source image data into the m-bit first corrected data; wherein the logic circuit calculates the m-bit first correction data assuming that the gamma correction data in each of the at least two sections is linearly dependent on grays; and wherein the m-bit first correction data is determined by where X