Tilting movement optical pickup actuator and optical recording and/or reproducing apparatus using the same and method
US7305688B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2004 |
| Grant date | Dec 4, 2007 |
| Priority date | — |
| Expiry date | Mar 9, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0956
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The optical pickup actuator includes a bobbin in which an objective lens is mounted, and suspension wires each having one end fixed on a side of the bobbin and the other end fixed to a holder disposed on a portion of a base to allow the bobbin to move with respect to the base. A magnetic circuit is installed in the bobbin and the base including a pair of unipolar magnets positioned on the base to face two sides of the bobbin. A focusing coil is wound around the bobbin. A plurality of tilting coils are installed on an upper portion of the bobbin and/or on a lower portion of the bobbin interact with the unipolar magnets to generate an electromagnetic force to control a tilting movement when a central axis of the objective lens is disposed in an upward and a downward direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.