Optical pick-up actuator
AssigneeLG Electronics Inc.
InventorIn Ho Choi
Life of this patent
Estimating the term…
Abstract
Disclosed is a magnetic circuit operable in multiple axes in an optical pick-up actuator. The optical pick-up actuator includes: a lens holder for receiving and moving an object lens in a predetermined direction; a magnetic circuit having; a plurality of coils series and parallel connected and attached to both sides of the lens holder; a yoke and a magnet faced with the coils, for generating and inducing different polarities in perpendicular directions. With such construction, the actuator moves the lens holder to tracking, focusing, tilting directions under control of a direction and intensity of a current by the magnetic circuit.
Claims23
An optical pick-up actuator comprising:
- a lens holder for receiving and moving an object lens in a predetermined direction;
- a plurality of first coils parallel connected on one side of both sides of the lens holder, for moving the lens holder to focusing and tilting directions;
- a single second coil attached to a center on both sides of the lens holder, for moving the lens holder to a tracking direction;
- and
- a polarity generating means faced with the first and the second coils, for generating different polarities in perpendicular directions.
An optical pick-up actuator comprising:
- a lens holder for receiving and moving an object lens in a predetermined direction;
- a plurality of first coils series connected and attached to one of both sides of the lens holder, for moving the lens holder to a focusing direction;
- a plurality of second coils series connected and attached to a center on both sides of the lens holder, for moving the lens holder to a tracking direction;
- a third coil horizontally wired on a periphery of the lens holder, for moving the lens holder to a tilting direction;
- and
- a polarity generating means faced with the coils on both sides of the lens holder, for generating different polarities in horizontal/vertical directions due to polarities of the magnet having multiple poles or polarity induction.
An optical pick-up actuator comprising:
- a lens holder for receiving and moving an object lens in a predetermined direction;
- and a magnetic circuit comprising;
- coils series and parallel connected on both sides of the lens holder, a yoke and a magnet faced with the coils, for generating and inducing different polarities in perpendicular directions, and
- the actuator moves the lens holder to tracking, focusing, tilting directions under control of direction and intensity of a current by the magnetic circuit.
Dependencies are inferred from the claim text.