Patent ID: 8162487

Claim:
A video projector comprising: a display device that receives an image signal, performs optical modulation on light emitted from a light source based on the image signal, and generates optically modulated image light to be projected onto a projection surface; a scaling processor that performs a scaling process on the input image signal; an on-screen display (OSD) processor that generates an adjustment pattern image and corrects the adjustment pattern image in accordance with a correction instruction on the projection surface; an image signal synthesizer that combines the image signal processed by the scaling processor with an OSD image signal generated and corrected by the OSD processor to generate a combined image signal; and a trapezoidal distortion corrector that performs trapezoidal distortion correction on the combined image signal from the image signal synthesizer based on the correction of the adjustment pattern image on the projection surface; wherein the adjustment pattern image generated by the OSD processor includes: a reference quadrangle pattern having the same shape as a displayable region on the display device and including four corner portions; and a plurality of downsized quadrangle patterns of different sizes, in which the downsized quadrangle patterns are reduced in size from the reference quadrangle pattern by a magnification of one or less, and wherein the reference quadrangle pattern and the plurality of downsized quadrangle patterns of different sizes are simultaneously projected on said projection surface.