Patent ID: 7374289
Filing Date: 2008-05-20
Classification: H04N

Abstract:
1. A projection type video display that optically modulates light emitted from a light source by a light valve and projects image light, comprising: a shutter device that opens and closes mechanically, and blocks the light by absorbing the light in a closing state; a shutter information output portion for outputting opening and closing information of the shutter device; a cooling means for air-cooling or liquid-cooling the light valve; a cooling control means for controlling the cooling means so as to decrease cooling power for the light valve, when receiving information indicating that the shutter device is in a closing state from the shutter information output portion; and an integrator lens formed of a pair of fly's eye lenses on a light-emission side of the light source, wherein the shutter device is provided between the pair of fly's eye lenses.