Patent ID: 8064294
Filing Date: 2011-11-22
Classification: G04C,H02P

Abstract:
1. A motor control circuit comprising: rotation detection means for detecting a rotation detection signal produced in response to rotation of a motor by one main drive pulse and for detecting whether or not the motor has rotated based on the rotation detection signal; and control means for selecting a main drive pulse corresponding to a magnitude of a load of the motor out of a plurality of main drive pulses which differ in energy from each other and supplying the selected main drive pulse to the motor to rotationally drive the motor and, when the rotation detection means detects that the motor has not rotated in response to the supplied main drive pulse based on the rotation detection signal, forcibly rotationally driving the motor with a correction drive pulse having energy larger than the respective main drive pulses, wherein the control means successively selects one of the main drive pulses out of the plurality of main drive pulses based on whether the immediately preceding rotation detection signal which is indicative of the rotation of the motor is detected by the rotation detection means before or after a predetermined reference time, and rotationally drives the motor based on the selected main drive pulse.