Patent ID: 6570611
Filing Date: 2003-05-27
Classification: G09G

Abstract:
An image display device comprising:a first look-up table memory for correcting a gamma curve of an input video signal so as to correct a gradation of a display image; a second look-up table memory for generating uniformity correction data on a screen at each gradation level; a positional information generating portion for generating uniformity correction data corresponding to a position on the screen; a correction data making portion for synthesizing the uniformity correction data output from the second look-up table memory and the uniformity correction data output from the positional information generating portion; and an arithmetic processing circuit for correcting the video signal that has been subjected to the gradation correction and read out from the first look-up table memory by using the uniformity correction data output from the correction data making portion; wherein the uniformity correction of the display image is performed at all gradation levels.