Stepping motor driving device, lens driving device, and camera
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United States of America Patent
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Jul 20, 2010
Grant Date -
May 1, 2008
app pub date -
Oct 24, 2007
filing date -
Oct 25, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A stepping motor driving device which makes it possible to reduce electric power consumed by a stepping motor and at the same time suppress degradation of shake correcting performance. A CPU of the stepping motor driving device switches between a first driving method in which a first applied voltage is applied to the stepping motor and a second driving method in which each pulse is divided to apply the first applied voltage over a predetermined time period and then apply a second applied voltage to the stepping motor, depending on the state of the drive frequency of the stepping motor.
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