Liquid crystal drive device, lcd apparatus and drive method

A liquid crystal drive device comprising:

• a frame memory configured to retain image information of a second frame, wherein the second frame is immediately preceding a first frame;
• a first calculator configured to calculate a first difference between image information of the first frame and the image information of the second frame;
• an edge enhancement processor configured to perform edge enhancement processing of the first frame for each of pixels of the first frame and outputting edge enhancement image information;
• a selector configured to select and output the edge enhancement image information when an absolute value of an output of the first calculator is at least a predetermined value and which selects and outputs image information of the first frame when the absolute value of the output of the first calculator is less than the predetermined value;
• a second calculator configured to calculate a second difference between an output of the selector and the image information of the second frame;
• an enhancement coefficient calculator configured to multiply the second difference by an enhancement correction coefficient;
• and
• a third calculator configured to calculate sum information by adding together an output of the enhancement coefficient calculator and the image information of the second frame, wherein a liquid crystal panel is driven on the basis of the sum information.