LENS DRIVING APPARATUS AND LENS DRIVING METHOD

A lens driving apparatus comprising: a stepping motor for driving a lens; a rotation detection sensor for detecting a rotation position of the stepping motor; and a controller which is capable of switching between open-loop control that performs position instruction in accordance with a predetermined pattern and closed-loop control that performs position instruction on the basis of follow-up delay, changes and accelerates the velocity for advancing the position of the stepping motor on the basis of a fixed velocity pattern by open-loop control when the lens starts moving, and transitions to the closed-loop control upon the velocity corresponding to the velocity pattern reaching a predetermined value. 提供镜头驱动装置和镜头驱动方法。防止了在镜头的工作开始时使镜头的驱动不稳定。镜头驱动装置具有：步进电机(6)，其对镜头进行驱动；励磁位置变更信号生成处理#11，其指示步进电机的旋转位置；GMR传感器(9)，其检测步进电机的旋转位置；以及追踪滞后计算#3，其根据由GMR传感器检测到的位置检测信息与励磁位置变更信号生成处理#11指示的位置信息之差计算追踪滞后，励磁位置变更信号生成处理#11能够切换以预先决定的模式进行位置指示的开环控制和根据追踪滞后进行位置指示的闭环控制，在镜头的工作开始时，利用开环控制根据固定的速度模式对使步进电机的位置前进的速度进行变更并加速，当与速度模式对应的速度达到规定值后，转移到闭环控制。