Patent ID: 7705814
Filing Date: 2010-04-27
Classification: G09G

Abstract:
1. A driving apparatus for a liquid crystal display, comprising: an image signal modulator for expanding contrast of input data when a previous image is analogous to a current image to thereby generate output data; and a timing controller for re-arranging the output data to apply the output data to a data driver. wherein the image signal modulator includes: a brightness/color separator for converting input data corresponding to the current frame into brightness components and chrominance components; a histogram analyzer for arranging the brightness components into a histogram for each frame and for storing a previous histogram; an image analyzer for extracting a control value from partial area brightness components of the brightness components; a comparator for determining an analogy between the current image and the previous image using a current control value and a previous control value; and a data processor for modulating current brightness components to have an expanded contrast ratio in correspondence with a result of the comparator to thereby generate modulated brightness components.