Optics: image projectors – Lamp control
Reexamination Certificate
2008-04-08
2008-04-08
Dowling, William C. (Department: 2851)
Optics: image projectors
Lamp control
C353S088000
Reexamination Certificate
active
07354159
ABSTRACT:
A shutter device can switch between a state where illuminating light from a lamp of an illuminating device is cut off (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 lamp power source to decrease power supplied to the lamp, when receiving information indicating that the shutter device is in the closing state from the detecting portion. After receiving this instruction, the lamp power source decreases the power supplied to the lamp.
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Nakamura Hisashi
Yasukawa Kei
Dowling William C.
Sanyo Electric Co,. Ltd.
Westerman Hattori Daniels & Adrian LLP
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