Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
May 8, 2007
Patent Application Number
11076083
Date Filed
March 9, 2005
Patent Primary Examiner
Patent abstract
An encoder for stably detecting the amount of movement of an object. The encoder includes an LED for emitting light toward a rotor plate including slits. An optical sensor generates an ON signal when the amount of emitted light passing through the slits exceeds a threshold value. A current increasing circuit increases the amount of current flowing through the LED when the optical sensor generates an ON signal.
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