Patent ID: 7554692

Claim:
A correction data acquisition method for an image display device wherein an image is displayed with a plurality of primary colors, comprising the steps of: displaying an offset image with a black signal level at an image display section in said image display device; capturing said offset image by successively switching filters having bands corresponding to said plurality of primary colors, respectively, so as to acquire a multiband offset captured data; sequentially displaying primary color images at said image display section, said primary color images having predetermined signal levels for the corresponding primary colors; sequentially capturing said primary color images while switching said filters for the corresponding primary colors, so as to acquire multiband primary color captured data; displaying primary color scale images at said image display section, said primary color scale images having an input signal level that is gradually changed for each of the corresponding primary colors; sequentially capturing said primary color scale images so as to acquire a primary color scale captured data; and calculating an offset correction data based on said multiband offset captured data, said multiband primary color captured data, and said primary color scale captured data.