Projector having an object detector

摘要

The invention provides a projector having a light source, a display device to modulate light emitted from the light source, a lens device to project light emitted from said light source via said display device, wherein the lens device has a diaphragm mechanism that is formed having an aperture, an object detector to detect an object between the lens device and the screen, and a diaphragm mechanism drive control to drive the diaphragm mechanism so as to reduce a size of an opening of the aperture of the diaphragm mechanism when the object detector detects an object between the lens device and the screen.