Patent ID: 7150536
Filing Date: 2006-12-19
Classification: H04N

Abstract:
1. A projector comprising: a projection unit which has a zooming function and converts image information of a supplied projection image into information of a projection light and projects the projection light onto a screen surface; a correction unit which corrects a projection image on the screen surface by inverse transformation using transformation coefficients , said projection image being distorted due to inclinations of an optical axis of the projection light with respect to the screen surface, and supplies information of the corrected projection image to the projection unit; and a transformation coefficient supply unit which obtains information regarding a zooming magnification of the projection unit and inclination angles of the optical axis of the projection light with respect to the screen surface, selects the transformation coefficients from preset transformation coefficients based on the obtained zooming magnification and inclination angles, and supplies the selected transformation coefficients to the correction unit; wherein the transformation coefficient supply unit comprises: