An image display device includes a timing controller capable of overdriving. The timing controller has three line buffers, an image reverse processing unit, and an overdrive unit. The first line buffer buffers first line data of a second frame, wherein the second frame is generated later than a first frame. The second line buffer buffers first compressed data. The image reverse processing unit estimates first and second line data of the first frame according to the first compressed data. According to the first and second line data of the first and second frames, the overdrive unit outputs first and second lines of interleaving data for an interleaving frame. The interleaving frame is inserted between the first and second frames. With the third line buffer, the timing controller outputs the first and second lines of interleaving data at different time point.