Electronic Timepiece, Movement, And Motor Control Circuit For A Timepiece

A movement comprising:

• a stepper motor including a coil, and a rotor that is pulled to a first statically stable position or a second statically stable position when a magnetic field that drives the rotor is not produced in the coil, and is pulled to a dynamically stable position when the magnetic field is produced in the coil;
• a current detector configured to detect a current value flowing through the coil;
• a driver controller configured to output, according to the current value the current detector detected, a first drive signal causing the rotor to turn in a forward direction to a position not pulled to the second statically stable position from a position where the rotor is pulled to the first statically stable position,
• output, according to the current value the current detector detected, a second drive signal causing the rotor to turn in a reverse direction, which is opposite the forward direction, past the dynamically stable position after outputting the first drive signal, and
• output, according to the current value the current detector detected, a third drive signal causing the rotor to turn in the reverse direction after outputting the second drive signal;
• and
• a driver that is controlled, according to the first drive signal, the second drive signal, and the third drive signal, to an on state supplying drive current to the coil and an off state not supplying drive current to the coil.

A motor control circuit comprising:

• a current detector configured to detect a current value flowing through the coil of a stepper motor including a coil, and a rotor that is pulled to a first statically stable position or a second statically stable position when a magnetic field that drives the rotor is not produced in the coil, and is pulled to a dynamically stable position when the magnetic field is produced in the coil;
• a driver controller configured to output, according to the current value the current detector detected, a first drive signal causing the rotor to turn in a forward direction to a position not pulled to the second statically stable position from a position where the rotor is pulled to the first statically stable position,
• output, according to the current value the current detector detected, a second drive signal causing the rotor to turn in a reverse direction, which is opposite the forward direction, past the dynamically stable position after outputting the first drive signal, and
• output, according to the current value the current detector detected, a third drive signal causing the rotor to turn in the reverse direction after outputting the second drive signal;
• and
• a driver that is controlled, according to the first drive signal, the second drive signal, and the third drive signal, to an on state supplying drive current to the coil and an off state not supplying drive current to the coil.