Pointer device, electronic watch, control method for pointer device, and recording medium

A control method for a pointer device, the pointer device comprising:

• a pointer;
• a stepping motor comprising a coil and configured to drive the pointer;
• a driving circuit configured to drive the stepping motor;
• a detection unit configured to detect electromotive force generated in the coil due to an impact;
• and
• at least one processor configured to control driving of the driving circuit, the control method comprising, the at least one processor performing:
• determining a direction of a first peak of the electromotive force detected by the detection unit;
• determining a total number of a second or subsequent peaks of the electromotive force detected by the detection unit, wherein each of the second or subsequent peaks of the electromotive force is a peak in the opposite direction to a peak immediately preceding the each of the second or subsequent peaks;
• determining whether the total number is an even number;
• determining whether the pointer is shifted in a shifting direction corresponding to the direction of a first peak of the electromotive force based on the direction of the first peak of the electromotive force and a result of the determination of whether the total number is the even number;
• and
• upon determining that the pointer is shifted in the shifting direction, correcting a position of the pointer in accordance with the shifting direction.

A non-transitory computer-readable recording medium storing a program for controlling a pointer device,

• a pointer;
• a stepping motor comprising a coil and configured to drive the pointer;
• a driving circuit configured to drive the stepping motor;
• a detection unit configured to detect electromotive force generated in the coil due to an impact;
• and
• at least one processor, wherein the program causes the at least one processor to execute:
• determining a direction of a first peak of the electromotive force detected by the detection unit;
• determining a total number of a second or subsequent peaks of the electromotive force detected by the detection unit, wherein each of the second or subsequent peaks of the electromotive force is a peak in the opposite direction to a peak immediately preceding the each of the second or subsequent peaks;
• determining whether the total number is an even number;
• determining whether the pointer is shifted in a shifting direction corresponding to the direction of a first peak of the electromotive force based on the direction of the first peak of the electromotive force and a result of the determination of whether the total number is the even number;
• and
• upon determining that the pointer is shifted in the shifting direction, correcting a position of the pointer in accordance with the shifting direction.