STEPPING MOTOR DRIVE CONTROL METHOD, LENS DRIVE CONTROL DEVICE, AND LENS DRIVE CONTROL METHOD

摘要

It is possible to obtain a high rotation accuracy and a high stop accuracy when driving a stepping motor for lens movement by the 1-2-phase excitation drive method. In a lens origin position detection process, when a lens holder has reached the PI position, the stepping motor (4) is stopped in a 2-phase excitation pattern capable of giving the most stable magnetic force to a magnetization rotor. Accordingly, even when the lens holder is driven by the 1-2-phase excitation drive method of the stepping motor (4) of a small diameter, it is possible to always obtain a high rotation accuracy and a high stop accuracy.