Patent ID: 11899405
Assignee: SEIKO EPSON CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An electronic watch, comprising: a motor including a coil;
a power source configured to generate a drive voltage for driving the motor;
a driver controlled to be in an ON state in which a drive current is supplied to the coil and an OFF state in which the drive current is not supplied to the coil;
a current detector configured to detect a current value of a current flowing to the coil;
a target current value setter configured to set a target current value in accordance with the drive voltage; and
a driver controller configured to compare the current value detected by the current detector with the target current value, control the driver to be in the ON state or the OFF state in accordance with a result of the comparison, and switch polarity of the drive current when detecting that an ON time, which is a duration of the ON state of the driver, meets a predetermined condition or an OFF time, which is a duration of the OFF state of the driver, meets a predetermined condition.