Patent ID: 6456337
Filing Date: 2002-09-24
Classification: G09G

Abstract:
A moving image correcting circuit in a display device that displays multitonal image by time-sharing one frame into plural subfields and emitting the subfields corresponding to the luminance level of an input image signal, characterized in that said display unit is provided with a motion vector detecting portion that detects the motion vector of a single frame or inter-frame blocks based on said input image signal and with a moving image correcting portion that outputs to said display unit the signal that corrected the display positions of respective subfields for the pixels in said blocks on a basis of the detected value from said motion vector detecting portion, said motion vector detecting portion having a correlation value operation part that computes the correlation value of the image signal corresponding to all the blocks in the detection area of the preceding frame picture, a least correlation value detecting portion that detects the least correlation value S1 endowed with the highest correlation from among plural correlation values as obtained in this correlation value operation part, a multiplier that multiplies this least correlation value S1 by a coefficient K, with K>1, a correlation value converting portion that replaces the plural correlation values obtained in said correlation value operation part that are not greater than the product KÃ—S1 with the set correlation value S2, with S2&lE;S1, to output the value thus replaced, a motion vector generating portion that detects a correlation value corresponding to the block nearest to the origin from among the set correlation value S2 to be output from said correlation value converting portion, generates a displacement vector whose starting and end points are the position of the block corresponding to said detected correlation value and the origin respectively, and outputs this displacement vector as a motion vector.