Patent ID: 7224351
Filing Date: 2007-05-29
Classification: G09G

Abstract:
1. A liquid crystal display comprising: a timing controller outputting digital gamma data for respective R, G and B colors; and a data driver comprising a digital gamma storage storing the digital gamma data from the timing controller, a gamma reference voltage generator generating gamma reference voltages for respective R, G and B colors, which are used in converting image signals into analog voltages on the basis of the stored digital gamma data, and a digital-to-analog converter converting image data for each of R, G and B into analog voltages to output them on the basis of the generated gamma reference voltages, wherein the gamma reference voltage generator comprises: a first polarity gamma reference voltage generator outputting sampled R, G and B gamma reference voltages with first polarities after performing sample/hold treatment of gamma reference voltage generated by sequentially receiving and converting serialized gamma data with first polarizes into analog data; and a second polarity gamma reference voltage generator outputting sampled R, G and B gamma reference voltages with second polarities after performing sample/hold treatment of gamma reference voltage generated by sequentially receiving and converting serialized gamma data with second polarities into analog data.