Abstract: A control section acquires a stop target position where a stop target lens should be stopped from a zoom tracing table according to zoom operation. Next, a motor driver is controlled to drive a DC motor of a lens unit. Comparison is made between a current state and a target deceleration curve. When the stop target lens reaches a deceleration start position, deceleration is made along the target deceleration curve by increasing or decreasing an ON ratio of PWM drive and a voltage applied according to deviance from the target deceleration curve. When the stop target lens reaches a complete stop processing start position, the motor driver is controlled to stop the stop target lens at the stop target position. Thereby, a zoom lens and a focus lens can be moved more precisely and speedily to the target position.

Abstract: In a camera, a zoom lens and focus lens are driven to predetermined positions corresponding to a zoom magnification factor to be changed upon a demand for altering the zoom magnification factor. During a zooming operation after the camera has been brought into focus by an auto-focusing function, driving rates of the zoom lens and focus lens are controlled in each of zoom intervals to set driving times required to drive the zoom lens and focus lens to positions corresponding to the next zoom magnification factor to the quickest zoom driving time Tz of the zoom lens and the longer driving time among the quickest focus driving times Tfa, Tfb of the focus lens corresponding to object distances.

Abstract: A control section (CPU) acquires a stop target position where a stop target lens should be stopped from a zoom tracing table according to zoom operation. Next, a motor driver is controlled to drive a DC motor of a lens unit. Comparison is made between a current state and a target (ideal) deceleration curve. When the stop target lens reaches a deceleration start position, deceleration is made along the target (ideal) deceleration curve by increasing or decreasing an ON ratio-of PWM drive or/and a voltage applied according to deviance from the target (ideal) deceleration curve. When the stop target lens reaches a complete stop processing start position, the motor driver is controlled to stop the stop target lens at the foregoing stop target position. Thereby, a zoom lens and a focus lens can be moved more precisely and speedy to the target position.

Abstract: In camera equipment, zoom lens and focus lens are driven to predetermined positions corresponding to a zoom magnification factor to be changed upon a demand for altering the zoom magnification factor. During a zooming operation after the camera has been brought into focus by an auto-focusing function, driving rates of the zoom lens and focus lens are controlled in each of zoom intervals to set driving times required to drive the zoom lens and focus lens to positions corresponding to the next zoom magnification factor to the quickest zoom driving time Tz of the zoom lens and the longer driving time among the quickest focus driving times Tfa, Tfb of the focus lens corresponding to object distances. During the zooming operation, the focus lens can be kept in the vicinity of focused focal position corresponding to the object distance and zoom lens position at all times without controlling the focus driving rate frequently.