Patent ID: 7034852
Filing Date: 2006-04-25
Classification: H04N

Abstract:
1. A projection system comprising: a measurement means for measuring a calibration image in an image display area and for outputting measurement data; a judgment means for judging whether or not image information of a normal image different from the calibration image has been inputted; a calibration information output means for outputting calibration information used for projecting the calibration image; an update means for updating predetermined correction information based on the measurement data and information indicating an ideal image appearance; a correction means for correcting the image information based on the updated correction information; and a projection type image display means for projecting the calibration image onto the image display area based on the calibration information and projects the normal image onto the image display area based on the corrected image information, wherein the calibration information output means starts outputting the calibration information when the judgment means judges that the image information of the normal image is not inputted while the calibration information has not been outputted, and stops outputting the calibration information when the judgement means judges that the image information of the normal image is inputted while the calibration information has been outputted.