Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hisashi Nakamura0
Kei Yasukawa0
Date of Patent
April 8, 2008
0Patent Application Number
112294920
Date Filed
September 20, 2005
0Patent Citations Received
...
Patent Primary Examiner
Patent 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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