Patent ID: 8411211

Claim:
A projection type video display device, comprising: a light source; a display element that displays a display video in a display area based on a video signal and modulates illumination light from the light source with the display video to form an optical image; a projection lens including a zoom lens and a focus lens, which projects the optical image on a screen; a lens drive part that adjusts a position of the zoom lens and a position of the focus lens; a projected video control part that controls a projected video to be projected to the screen, a lens shift part drive part that shifts the projection lens in a direction perpendicular to a projection optical axis; and a display position adjusting part that changes a display position of the display video in the display area, wherein the projected video control part drives the lens drive part in accordance with an aspect ratio of the input video, based on lens position information of the zoom lens and lens position information of the focus lens, determined by the aspect ratio of the input video in the video signal, and wherein the projected video control part allows the display position adjusting part to be operated in accordance with the aspect ratio of the input video, based on the display position information of the display video determined by a shift amount of the projection lens and the aspect ratio of the input video.