Abstract: An optical pickup actuator including a coil, a first magnet, and a second magnet. The coil is installed in a blade holding an objective lens. The first magnet is positioned inside a cavity formed in the center of the coil. The second magnet is installed outside the cavity to face the first magnet. The outer surface of the first magnet facing the coil is polarized into a first pole and inner surface of the first magnet is polarized into a second pole.

Abstract: An optical pickup actuator includes a blade holding an objective lens, a flexible support supporting the blade so that the blade is movable with respect to a holder installed on a base, a magnet installed on the base, and a pattern coil installed in the blade facing the magnet. The pattern coil has a tracking coil and at least one pair of focusing coils symmetrically disposed on either side of the tracking coil, and driving in the focusing and tilting directions is selectively performed depending on the direction current flows through the pair of focusing coils. In the above configuration, the actuator can easily perform tilting control as well as focusing and tracking control, thereby increasing precision of control.

Abstract: An actuator for an optical pickup includes a magnetic circuit having a structure in which coils to drive an objective lens in one direction selected from a focusing, tilting, or tracking directions, and magnets to drive the objective lens in the other directions. The coils and magnets are installed on the bobbin. The actuator for an optical pickup reduces the number of wires required for 6-axis direction driving, thereby making assembly easy. The actuator includes magnets, yokes, and coils in the bobbin, thereby reducing the mass of the bobbin, improving sensitivity, and increasing the efficiency of magnetic force.

Abstract: A magnetic circuit, an optical pickup actuator and an optical recording and/or reproducing apparatus using the magnetic circuit. The magnetic circuit comprises a magnet, a tracking coil, and a first focusing/tilting coil. The magnet includes first, second, third and fourth magnet parts, the first and second magnet parts being disposed adjacent to each other and having opposite polarizations, the third and fourth magnet parts respectively neighboring the first and second magnet parts such that at least two sides thereof are enclosed by the first and second magnet parts, and having opposite polarizations to the first and second magnet parts, respectively. The tracking coil interacts with the first and second magnet parts for a tracking movement.

Abstract: Provided is an optical pickup actuator including a blade, a plurality of wires, coils, magnets, and connectors. The blade has an objective lens. The plurality of wires support the blade so that the blade moves around a predetermined holder. The coils are installed on the blade. The magnets interact with a current flowing through the coils to generate an electromagnetic force. The connectors electrically connect the wires and the coils so that a power supply supplies a current to the coils via the wires. The connectors include conductive plating terminals that are connected to the coils and installed on the body of the blade so that ends of the wires are connected to the connectors.

Abstract: An optical pickup actuator includes a bobbin, support members, and a pair of magnetic circuits. An objective lens is mounted on the bobbin. The support members have first ends fixed on sides of the bobbin and second ends fixed to a holder placed on a portion of a base to allow the bobbin to move with respect to the base. The magnetic circuits are installed on two sides of the bobbin and on the base. Each magnetic circuit includes a tracking coil which moves the bobbin in a tracking direction, a plurality of focusing/tilting coils which moves the bobbin in at least one direction of a focusing direction and a tilting direction having a focusing component, and a magnet which faces the focusing/tilting coils and the tracking coil and have a polarized structure to move the bobbin in the tracking direction and at least one direction of the focusing direction and the tilting direction having the focusing component.

Abstract: An actuator for an optical pickup includes a magnetic circuit having a structure in which coils to drive an objective lens in one direction selected from a focusing, tilting, or tracking directions, and magnets to drive the objective lens in the other directions. The coils and magnets are installed on the bobbin. The actuator for an optical pickup reduces the number of wires required for 6-axis direction driving, thereby making assembly easy. The actuator includes magnets, yokes, and coils in the bobbin, thereby reducing the mass of the bobbin, improving sensitivity, and increasing the efficiency of magnetic force.