| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor drive unit, a light-emitting device and a drive method capable of responding to a rapid change in speed.SOLUTION: A drive unit 40 of a motor 33 of the present invention is a drive unit 40 for a motor 33 which moves a light-emitting unit 20 emitting light to be irradiated upon the subject to a target position which is set on the basis of the movement amount of a photographing lens 2L. Whether the motor 33 is to be driven in a trapezoid drive mode in which the revolution speed of the motor 33 is raised at a prescribed change rate within a prescribed time after the start of drive, maintained at a certain number of revolutions thereafter, and then reduced at a prescribed change rate within a prescribed time after the end of drive, or a constant speed drive mode in which the revolution speed of the motor 33 is maintained at a certain number of revolutions is determined depending on the distance to the target position. The motor 33 is driven on the basis of this determination. |
