Patent ID: 8804048

Claim:
A method for reducing motion blur in a video image displayed on a video display, the method comprising: receiving a video signal that includes a plurality of frames associated with the video image to be displayed on the video display, each of the plurality of frames having a luminance level; comparing the plurality of frames of the video signal to detect motion in the video image, wherein comparing the plurality of frames of the video signal to detect motion in the video image includes determining a number of pixel changes between consecutive frames in the video signal, and comparing the number of pixel changes with a global motion threshold value, wherein a number of pixel changes greater than the global motion threshold value is an indication of motion in the video image; and varying the luminance levels between two or more consecutive frames of the video image in order to reduce motion blur in the video image, wherein varying the luminance levels between two or more consecutive frames of the video image comprises gradually increasing over time a difference in the luminance levels between the two or more consecutive frames upon detecting motion in the video image, and gradually decreasing over time the difference in the luminance levels between the two or more consecutive frames upon detecting that the video image is not in motion, wherein the luminance levels of the two or more consecutive frames are determined based on luminance correction values, wherein the luminance correction values are computed by applying a gain coefficient that varies in a stepwise manner with time to one or more lookup table values, and wherein the luminance levels of the two or more consecutive frames are determined based on an equation D out,n =D in,n +(−1) n ·C ( m )·Δ( d ), where D out,n is an output luminance value for a frame n, D in,n is an input luminance value for the frame n, C(m) is the gain coefficient that varies in a stepwise manner with time, and Δ(d) is a luminance correction value from a lookup table that varies based on whether the frame n is an even-numbered frame or an odd-numbered frame.