Patent ID: 7483084
Filing Date: 2009-01-27
Classification: G09G

Abstract:
1. An image display apparatus that displays an image based on a video signal, comprising: a grayscale display unit that divides said video signal for each field into a plurality of sub-fields, each of which is weighted according to the duration of time or number of pulses, and temporally superimposes said plurality of sub-fields for display to provide a grayscale representation; a field delay unit that delays a video signal for a current field by one field, and outputs said delayed video signal as a video signal for a previous field; a luminance gradient detector that detects a luminance gradient of said image based on said video signal for said current field and said video signal for said previous field output from said field delay unit; a differential calculator that calculates a difference between said video signal for said current field and said video signal for said previous field output from said field delay unit; and a motion amount calculator that calculates an amount of motion of said image based on the difference calculated by said different calculator and the gradient detected by said luminance gradient detector.