In a liquid-crystal-driving image processing circuit that encodes and decodes image data to reduce the frame memory size, the present invention has the object of providing a liquid-crystal-driving image processing circuit capable of correcting image data accurately and applying appropriately corrected voltages to the liquid crystal without being affected by encoding or decoding errors, even when moving images are input.To achieve the above object, the liquid-crystal-driving image processing circuit according to the present invention takes a difference between first decoded image data corresponding to the image in the current frame and second decoded image data corresponding to preceding-frame image data, selects either the image data of the current frame or the second decoded image data for each pixel on the basis of the difference, thereby generates preceding-frame image data, and corrects the gray-scale values of the image of the current frame on the basis of the preceding-frame image data and the image data of the current frame.