Electronic Watch And Electronic Watch Control Method
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United States of America Patent
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Issued Date -
Jul 20, 2023
app pub date -
Jan 18, 2023
filing date -
Jan 19, 2022
priority date (Note) -
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Abstract
An electronic watch includes hands, a stepping motor, a drive circuit, a controller, a current detection circuit that detects a current value flowing through the drive circuit, and a storage unit that stores polarity information of a drive pulse output from the controller to the drive circuit, wherein the controller initializes the polarity information stored in the storage unit when the storage unit is initialized, outputs a polarity detection pulse, which does not cause the stepping motor to rotate by one step, to the drive circuit based on the initialized polarity information, performs a polarity determination processing of determining whether a polarity of the stepping motor and the polarity information match based on the current value detected by the current detection circuit in response to the output of the polarity detection pulse, and changes the polarity information when the polarity of the stepping motor and the polarity information do not match.
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