| 摘要 |
PURPOSE: An optical pickup actuator is provided to perform a stable servo operation at a high speed disk player through eliminating rotational force caused by difference between a force center and a gravity center of a bobbin by adding a magnet to a yoke. CONSTITUTION: To perform focusing and tracking an objective lens(501), current is applied to a focusing coil(503) and a tracking coil(504) by passing through a second PCB(Printed Circuit Board)(508), plural wire suspensions(507), and a first PCB(511). Moreover, the objective lens mounted on a bobbin(502) is driven by electric field of the focusing coil and the tracking coil, and by magnetic field of magnets(505-1,505-2,512). Herein, the magnet(512) is added for compensate rotational force caused by difference between a gravity center and a force center of the bobbin. Moreover, the magnet(512) is installed to form the magnetic field toward an identified direction with the magnetic field formed by the existing magnets. |
