Patent ID: 7929000

Claim:
An image display device for providing a gradation display based on a video signal, comprising: a plurality of display elements; a drive circuit for driving the display elements; a video conversion circuit for obtaining a video signal in units of sub-frames based on a video signal inputted in units of frames; a time-division gradation process circuit for performing gradation level conversion on a video signal outputted from the video conversion circuit to distribute brightness for one frame cycle to a plurality of sub-frame cycles; a gradation level change detection circuit for detecting whether a gradation level of each pixel has been changed between consecutive sub-frames for the video signal outputted from the video conversion circuit; and an overshoot process circuit for outputting to the drive circuit a video signal obtained by subjecting a video signal outputted from the video conversion circuit, instead of a video signal outputted from the time-division gradation process circuit, regarding any pixel detected by the gradation level change detection circuit to have its gradation level changed, the gradation level conversion being performed in order to distribute brightness for one frame cycle to a plurality of sub-frame cycles while emphasizing a temporal change of the signal.