Patent ID: 7397536

Claim:
A projection image display apparatus comprising: an image generation part in which a plurality of mirror elements are arranged, the mirror elements moving between an on-position at which illumination light from an illuminating optical system is reflected toward a projection optical system and an off-position at which the illumination light is reflected toward an outside of the projection optical system, whereby on-light reflected from the mirror element located at the on-position constitutes an image; and a light shielding member in the path of the illumination light between the illuminating optical system and the image generation part that i) partially shields the illumination light so as to reduce image brightness in a region where an intensity of reflected light reflected between the on-light and off-light reflected from the mirror element located at the off-position becomes strong, and ii) makes the intensity of the illumination light emitted to respective mirror elements uneven, wherein the light shielding member has a linear side part inclined to a moving direction of the light shielding member.