Patent ID: 7458087
Filing Date: 2008-11-25
Classification: G11B

Abstract:
1. An optical pickup actuator for driving, via a magnetic driving unit, in focusing, tracking, and tilting directions, a bobbin on which an objective lens is disposed, comprising at least one damping member disposed at a position where great changes in the optical pickup actuator occur when the magnetic driving unit drives the bobbin in one of the focusing, tracking, and tilting directions, so that a size of a second resonant peak is reduced, wherein the magnetic driving unit includes: first magnets disposed at opposing sides of the bobbin, respectively; tracking coils which are wound around the bobbin to oppose respective ones of the first magnets; second magnets which are spacedly disposed from respective ones of the first magnets, respectively; and focusing coils which are wound between the first magnets and the second magnets, and wherein a first damping member is inserted within an entire center portion of the focusing coils and surrounded thereby, wherein the bobbin has corners and second damping members are respectively disposed at each corner.