Patent ID: 7917023
Filing Date: 2011-03-29
Classification: G03B,H02K

Abstract:
1. A lens driving apparatus, comprising: a hollow first retaining frame defining a plurality of first retaining portions at a plurality of sides thereof; a plurality of first coils of wire received in the first retaining portions; and a voice coil motor movably received in the first retaining frame, the voice coil motor comprising a hollow second retaining frame, a plurality of magnets, and a hollow core member with a second coil of wire wound around the core member, the second retaining frame defining a plurality of second retaining portions at sides thereof, the magnets being received in the second retaining portions, respectively, the core member being movably received in the second retaining frame and configured for receiving at least one lens therein; wherein the magnets are configured for generating magnetic fields which are capable of driving the core member to move along an axis of the second retaining frame when the second coil of wire is electrically powered; and at least one of the magnets is subject to a reverse Ampere's force when one or more corresponding of the first coils of wire is electrically powered, such that the second retaining frame together with the at least one lens is moved in a plane substantially perpendicular to an axis of the first retaining frame.