Patent ID: 7724971

Claim:
A method of detecting a motion image for a TFT LCD, an image being divided into a plurality of pixels, said method comprising: converting signals representing a pixel of a first time frame image into RGB form data, and converting signals representing a pixel of a second time frame image into RGB form data, called RcGcBc data, wherein positions of said two pixels on said two frame images correspond, said second time is later than said first time, said two frame images are temporally adjacent, and said second time frame image is a current time input frame image; transforming said RGB form data representing said two pixels into YUV form data; compressing said YUV form data of said pixel of said first time frame image into YmUmVm form data, called YpUpVp data, and compressing said YUV form data of said pixel of said second time frame image into YmUmVm form data, called YcUcVc data; computing a first difference between said Yp component and said Yc component, a second difference between said Up component and said Uc component, and a third difference between said Vp component and said Vc component representing said two corresponding pixels of said first time frame image and said second time frame image; and comparing said first difference with a first threshold, said second difference with a second threshold, and said third difference with a third threshold, and when at least one of said first difference, said second difference, and said third difference is larger than said first threshold, said second threshold, and said third threshold, respectively, judging the pixel of said two corresponding pixels that is of said second time frame image to be of a motion picture, wherein when none of said first difference, said second difference, and said third difference is larger than said first threshold, said second threshold, and said third threshold, respectively, further judging the pixel of said two corresponding pixels that is of said second time frame image to be of a still picture; and outputting, using a multiplexer, wherein when said pixel of said second time frame image is judged to be of a motion picture, comparing said YpUpVp data and said YcUcVc data of said two corresponding pixels, decompressing said YpUpVp data into YdUdVd data, then transforming said YdUdVd data into RGB form data, called R′G′B′ data, and performing an overdrive processing on said RcGcBc data and said R′G′B′ data of said two corresponding pixels to produce RoGoBo data, and the multiplexer outputs the RoGoBo data, and wherein when said pixel of said second time frame image is judged to be not of a motion picture, the multiplexer outputs the RcGcBc data.