Optical apparatus with motor drive control selected based on rotor position sensor or determined time interval
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United States of America Patent
Stats
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Dec 27, 2011
Grant Date -
Jul 30, 2009
app pub date -
Jan 23, 2009
filing date -
Jan 25, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
An optical apparatus having a recording mode that is switchable between motion picture recording and still picture recording includes an optical element, a motor that includes a rotor having a magnet, and a stator having a coil configured to provide a rotational force to the magnet, the motor being configured to drive the optical element, a position sensor configured to detect a position of the rotor of the motor, and a driving circuit configured to select, in accordance with the recording mode, first driving configured to switch an electrization to the coil in the motor in accordance with a determined time interval, or second driving configured to switch an electrization to the coil in the motor in accordance with an output of the position senor.
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