Patent ID: 7222972

Claim:
A projection apparatus comprising: a projection section which projects an image in accordance with an input image signal; a ranging section which measures respective distances to each of a plurality of positions in an image projection plane formed by said projection section; a keystone correcting section which performs keystone correction on an image to be projected by said projection section in such a way that a projected image becomes a rectangle with an adequate aspect ratio, based on the distances acquired by said ranging section; a focus control section which focuses the image to be projected by said projection section at an arbitrary position in the image that has undergone keystone correction in said keystone correcting section; a first instruction switch which instructs execution of one-shot keystone correction and focusing, said first instruction switch being selectively operable by a user; a second instruction switch which instructs execution of continuous keystone correction and focusing, said second instruction switch being selectively operable by the user; and a control section which controls a number of times that said ranging section, said keystone correcting section and said focus control section are operated to perform keystone correction and focusing in response to an instruction from one of said first instruction switch and said second instruction switch.