Method and apparatus for driving liquid crystal display

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:
• 1) a histogram analyzer for arranging green data of the input data corresponding to the current frame into gray levels for each frame to generate a histogram and for storing the generated histogram using green data of data of the previous frame;
• 2) an image analyzer for extracting a control value from green data of a partial area of the green data of the current frame;
• 3) a comparator for determining an analogy between the current image and the previous image using a current partial area control value and a previous partial area control value;
• and
• 4) a data processor for generating the output data obtained by an expansion in a contrast of the input data in correspondence with a result of the comparator.