Patent ID: 7742065

Claim:
A controller driver comprising: an overdrive processing unit generating corrected image data by correcting a tone value of received image data based on the received image data and image data of a frame previous to the received image data; an image memory storing the previous frame image data; a data line driver supplying a liquid crystal driving voltage based on the corrected image data; and a roundabout route through which the previous frame image data stored in the image memory is transferred to the data line driver for displaying a still image, the roundabout route bypassing the overdrive processing unit, wherein in displaying a moving image, the data line driver generates the driving voltage based on the corrected image data fed from the overdrive processing unit, and the image memory receives sequentially the received image data, and wherein in displaying a still image, the data line driver generates the driving voltage based on the previous frame image data fed from the image memory via the roundabout route.