Patent ID: 8767097

Claim:
A lens actuating device, applied in an image capturing device, comprising: a focus lens group, for changing a focal point of an image; a zoom lens group, for changing a focal length of the image; a motor, for driving movements of the zoom lens group and the focus lens group respectively; and a microcontroller, for receiving a plurality of instructions, and to control the motor to drive the focus lens group or the zoom lens group at one of a plurality of predetermined speeds to perform a focus motion or a zoom motion according to the received instructions, wherein the plurality of predetermined speeds includes a first predetermined speed, a second predetermined speed and a third predetermined speed, and when the image capturing device is powered on and the microcontroller receives a power-on instruction, the microcontroller controls the motor at the first predetermined speed to drive the movements of the focus lens group to perform the focus motion, and after the focus motion is completed, the microcontroller adjusts the first predetermined speed to the second predetermined speed, and when the microcontroller receives a zoom instruction, the microcontroller controls the motor at the second predetermined speed to drive the movements of the zoom lens group and perform a zoom motion, and when the microcontroller receives an image capturing instruction, the microcontroller adjusts the second predetermined speed to the third predetermined speed to control the motor to drive the movements of the focus lens group and perform the focus motion, and wherein the first predetermined speed is greater than the second predetermined speed and the third predetermined speed, and the second predetermined speed is greater than the third predetermined speed.