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US 2011/0234989 A1Published application
Projector
AssigneeSeiko Epson Corporation
InventorYusuke KUDO
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Abstract
A projector which includes a projection optical device which projects an image includes: a heating unit which heats the projection optical device; and a control unit which controls the heating unit, wherein the control unit controls the heating unit so that the temperature of the projection optical device is equal to or higher than the temperature in which a focal position of the projection optical device is stabilized.
Claims4
A projector comprising:
- a projection optical device that projects an image;
- a heating unit that heats the projection optical device;
- and
- a control unit that controls the heating unit,
- the control unit controlling the heating unit so that the temperature of the projection optical device is equal to or higher than the temperature in which a focal position of the projection optical device is stabilized.
2 more elements
Dependencies are inferred from the claim text.