Patent ID: 7961164

Claim:
A signal processing device comprising: a converting unit which converts first, second, and third image data of three consecutive frames into first sub first image data, first sub second image data, and first sub third image data having gray levels higher than gray levels of first, second, and third image data, respectively, and second sub first image data, second sub second image data, and second sub third image data having gray levels lower than the gray levels of the first, second, and third image data, respectively; a first correcting unit which compares the first sub first image data, the first sub second image data, and the first sub third image data, corrects the first sub second image data according to the comparison result, and outputs corrected first sub second image data; and a second correcting unit which compares the second sub first image data, the second sub second image data, and the second sub third image data, corrects the second sub second image data according to the comparison result, and outputs corrected second sub second image data.