Patent ID: 7785022

Claim:
A method for start-up lens for use in a lens comprising an optical component, and a control system controlling a drive unit to drive the lens moving from a stowing position to a standby position, where a reset point, a first turning point, a second turning point, and a third turning point are defined in sequence during the movement, the method comprising: rotating the drive unit at a first angular velocity to drive the lens to lengthen in a first route, where the first route is from the stowing position to a first switch point, and the first switch point is between the first turning point and the second turning point; rotating the drive unit at a second angular velocity to drive the lens to continue lengthening in a second route, where the second route is from the first switch point to a second switch point, and the second switch point is between the first switch point and the second turning point; and rotating the drive unit at a third angular velocity to drive the lens to lengthen in a third route, where the third route is from the second switch point to the standby position.