Patent ID: 8740392

Claim:
A projection display device comprising: a device main body including an image projecting section projecting an image; a shutter that opens and closes an opening for ventilation, the opening of the device main body; an electricity storage section storing power from the external power source and supplying the stored power as operating power; an interruption detecting section detecting an interruption of the external power source; and a control section that performs, in case that an interruption of the external power source is detected, control to reduce the power consumption of the device main body and control to drive the shutter so that the shutter is closed by the power supplied from the electricity storage section, wherein the device main body has at least one of a fan sending air to the opening, a liquid crystal panel modulating a light from a light source, a sound outputting section outputting sound, and an output terminal outputting a predetermined signal to the outside, and in case that the interruption detecting section detects that the external power source is interrupted, the control section stops the driving of at least any one of the fan, the liquid crystal panel, the sound outputting section, and the output terminal.