Optical pick-up actuator
AssigneeLG Electronics Inc.
InventorsIn Choi, Sam Hong, Jin Kim, Young Kim
Life of this patent
Estimating the term…
Abstract
An optical pick-up actuator is provided. The optical pick-up actuator includes a lens holder, a tracking coil, a focusing coil, and a magnet. The lens holder holds an objective lens. The tracking coil is wound with wire, is disposed at a central portion on both sides of the lens holder, and includes a horizontal width at a top thereof that is less than a horizontal width at a bottom thereof. The focusing coil is wound with wire, is disposed at a left and a right on both sides of the lens holder, and includes a horizontal width at a top thereof that is greater than a horizontal width at a bottom thereof. The magnet faces the tracking coil and the focusing coil.
Claims20
An optical pick-up actuator comprising:
- a lens holder holding an objective lens;
- a tracking coil wound with wire disposed at a central portion on both sides of the lens holder and including a horizontal width at a top thereof that is less than a horizontal width at a bottom thereof;
- a focusing coil wound with wire disposed at a left and a right on both sides of the lens holder and including a horizontal width at a top thereof that is greater than a horizontal width at a bottom thereof;
- and
- a magnet facing the tracking coil and the focusing coil.
An optical pick-up actuator comprising:
- a lens holder holding an objective lens;
- a tracking coil wound with wire disposed at a central portion on both sides of the lens holder and including a horizontal width at a top thereof that is less than a horizontal width at a bottom thereof;
- a focusing coil wound with wire disposed at a left and a right on both sides of the lens holder and including a horizontal width at a top thereof that is greater than a horizontal width at a bottom thereof;
- a tilt coil wound with wire together with the focusing coil;
- and
- a magnet facing the tracking coil, the focusing coil, and the tilt coil.
An optical pick-up actuator having a magnetic circuit for moving a lens holder holding an objective lens on multiple axes, wherein the magnetic circuit comprises:
- a trapezoidal tracking coil wound with wire at a central portion on both sides of the lens holder;
- an inverse trapezoidal focusing coil wound with wire to a left and a right of the tracking coil;
- and
- a multi-polar magnet having a bi-polarity opposite to the focusing coil and the tracking coil.
Dependencies are inferred from the claim text.