Patent ID: 7154516

Claim:
An image display device operable to display multiple grayscales, based on an input image signal, by controlling each sub-field of a plurality of sub-fields composing each field to be lit or not lit, said image display device comprising: a gradient detector operable to detect an area having a grayscale gradient within the image signal, and operable to detect the amplitude and the direction of the area having the grayscale gradient; a motion detector operable to detect an area having motion within the image signal, and operable to detect the amplitude and the direction of the area having the motion; and a grayscale compensator operable to compensate a plurality of predetermined grayscale gradients within the image signal, wherein: said grayscale compensator is operable to identify at least one of the plurality of predetermined grayscale gradients to be compensated, and said grayscale compensator is operable to select at least one of the plurality of compensation grayscale gradients according to the amplitude and the direction of the grayscale gradient detected by said gradient detector and according to the amplitude and the direction of the motion detected by said motion detector.