Patent ID: 7614752
Filing Date: 2009-11-10
Classification: G03B,H04N

Abstract:
1. An image display apparatus comprising: a spatial light modulating element formed with a plurality of light modulating elements for each modulating light from a light source, said light modulating elements being arranged in a row or a plurality of rows; a projection optical system for forming a first image on a basis of the light modulated by said spatial light modulating element; light deflecting means for forming a second image by reflecting said first image formed by said projection optical system so as to scan said first image in a direction orthogonal to a longitudinal direction of said first image, said longitudinal direction of said first image being a longer direction of said first image; a magnifying and projecting system for magnifying said second image and projecting said second image on a screen; and detecting means for detecting intensity of the light modulated by said spatial light modulating element and reflected by said light deflecting means via said projection optical system, said detecting means being disposed at a position that the light reflected from said light deflecting means enters without passing through said magnifying and projecting system, said position being off an optical path of the light going from said light deflecting means to said magnifying and projecting system; wherein when said second image is projected on said screen, said light deflecting means reflects said first image toward said magnifying and projecting system so as to scan said first image in the direction orthogonal to the longitudinal direction of said first image, and when the intensity of the light modulated by said spatial light modulating element is detected, said light deflecting means reflects the light from said projection optical system toward said detecting means.