Projection Type Video Display Apparatus

A projection type video display apparatus comprising:

• a projection section to generate projection light of a video to output through a projection lens;
• an imaging section to image through a camera lens in a direction in which a video is projected;
• an XY driving section to change positions of the projection lens and the camera lens in a manner interlocked with each other in a direction to which a projection direction of a video is changed;
• a focus driving section to change positions of the projection lens and the camera lens in a manner interlocked with each other in a direction to change focus;
• and
• a control section to perform a position adjustment processing of the projected video relative to a screen and a focus adjustment processing of the projected video, wherein
• in the position adjustment processing, the control section allows the imaging section to image in the projection direction and when two pre-set marks are imaged in an imaged image, the control section calculates a center point shown by the two marks on the imaged screen and a center point of the video projected by the projection section on the imaged screen and the control section allows the XY driving section to move by only an amount of a difference between the points;
• and
• in the focus adjustment processing, the control section allows the imaging section to image in the projection direction, and when two pre-set marks are imaged in the imaged image, the control section analyzes the image imaged by the imaging section while allowing the focus driving section to move, and the control section allows the focus driving section to move the camera lens and the projection lens to a position where the projected video is focused at the center point shown by the two marks based on a difference of an amount of unfocus of each mark.