IMAGING DEVICE, MOTOR DRIVING DEVICE AND IMAGING METHOD
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United States of America Patent
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Issued Date -
Sep 11, 2014
app pub date -
Feb 10, 2014
filing date -
Mar 5, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
In an imaging device having a driving device using a stepping motor, improvement in recovery speed after a step out of the motor is realized. An imaging device having a driving device which carries out lens driving, diaphragm driving or pan-tilt-zoom driving with a stepping motor, includes: a motor driving unit which controls a current or voltage supplied to an exciting coil of the stepping motor; a system control unit which outputs a motor driving stop instruction to the motor driving unit; and a detection unit which detects a current or voltage flowing through the exciting coil after the stop instruction is outputted. The system control unit finds a direction of correction and an amount of correction to recover from a movement of a rotor due to a step out of the stepping motor, based on the current or voltage detected by the detection unit, and moves the stepping motor based on the direction of correction and the amount of correction.
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