Watch motor control circuit, electronic watch, and watch motor control method
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United States of America Patent
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Feb 20, 2024
Grant Date -
Jul 15, 2021
app pub date -
Jan 8, 2021
filing date -
Jan 9, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
An electronic watch includes a driver controlled to be in an ON state in which a drive current is supplied to a coil of a watch motor, and an OFF state in which the drive current is not supplied, a current detector that detects a current value flowing through the coil, a driver controller that controls the driver, a polarity switching controller that alternately switches a polarity of the drive current to a first polarity and a second polarity, a sampling controller that, at a sampling cycle, intermittently causes the current detector and the driver controller to operate, and a sampling cycle setting controller that detects a sampling cycle setting condition and changes the sampling cycle in at least two stages of a first cycle and a second cycle longer than the first cycle.
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