Patent ID: 7131732

Claim:
A projector apparatus comprising: a distance measuring unit which measures distances between itself and a plurality of measurement points on a screen and outputs plural pieces of distance data representing measurement results; an angle obtaining unit which obtains a screen formula representing a positional relation between a light axis of a projection light projected from the projector apparatus and the screen onto which the projection light is projected, by using the plural pieces of distance data output from the distance measuring unit, and obtains an inclination angle of the light axis with respect to a surface of the screen by using the obtained screen formula; a correction unit which corrects a distortion of a projection image which is to be displayed on the surface of the screen, by using the inclination angle of the light axis with respect to the surface of the screen obtained by the angle obtaining unit; and a projection unit which converts the projection image corrected by the correction unit into a projection light and projects the projection image on the surface of the screen.