Patent ID: 7234819

Claim:
A projector system which includes a projector, the projector including a projection image forming unit which forms an image to be projected to a projection surface and a projecting lens, comprising: an input unit which inputs photographic information in photographing a projection image and distance information indicating a distance L p to the projection surface, the photographic information including a size y c of an image pickup element in a predetermined direction in photographing the object, a focal length f c of a photographic lens in photographing the object, and a distance L c to the object; and a control unit which determines one of (A) a focal length f p of the projecting lens in projecting the object and (B) an effective portion y p of the projection image forming unit in accordance with the size y c of the image pickup element, the focal length f c of the photographic lens, the distance L c to the object, and the distance L p to the projection surface, to thereby control a size of the image to be formed by the projection image forming unit on the projection surface.