Projection type video display
AssigneeSanyo Electric Co., Ltd.
InventorHisashi Nakamura
Life of this patent
Estimating the term…
Abstract
A shutter device can switch between a state where illuminating light from a lamp of an illuminating device is blocked (referred to as a closing state of the shutter device) and a state where illuminating light passes through (referred to as an opening state of the shutter device). A system control circuit instructs a panel cooling fan-use power source to decrease a fan rotation speed, when receiving information indicating that the shutter device is in the closing state from the detecting portion. After receiving this instruction, the panel fan power source decreases power supplied to the panel cooling fan (fan motor).
Claims7
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 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;
- and
- 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.
Dependencies are inferred from the claim text.