Patent ID: 11906934
Assignee: SEIKO EPSON CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 2:
3. The watch motor control circuit according to claim 1, comprising:
a time period measuring controller configured to measure an elapsed time period from when the polarity switching controller switches the polarity of the drive current, wherein
the sampling cycle setting condition is the elapsed time period,
the sampling cycle setting controller compares the elapsed time period with a first elapsed time period threshold value and a second elapsed time period threshold value that is a value greater than the first elapsed time period threshold value,
when the elapsed time period is less than the first elapsed time period threshold value, the sampling cycle setting controller sets the sampling cycle to the first cycle,
when the elapsed time period is equal to or greater than the first elapsed time period threshold value and less than the second elapsed time period threshold value, the sampling cycle setting controller sets the sampling cycle to the second cycle that is longer than the first cycle, and
when the elapsed time period is equal to or greater than the second elapsed time period threshold value, the sampling cycle setting controller sets the sampling cycle to a third period that is shorter than the second cycle.