Optical pickup actuator, optical pickup employing the optical pickup actuator, and optical recording and/or reproducing apparatus employing the optical pickup

An optical pickup actuator for use with a disc, comprising:

• a holder;
• a bobbin to mount an objective lens;
• a magnetic driving portion to drive the bobbin in a focusing direction and/or a tracking direction;
• and
• a plurality of asymmetrical elastic supports movably supporting the bobbin such that the bobbin driven by the magnetic driving portion produces only A and C type radial rolling to compensate for a curvature of the disc.

An optical pickup for use with a disc, comprising:

• an objective lens;
• and
• a pickup actuator to control a movement of the objective lens and to record information on and/or to reproduce information from the disc, wherein the pickup actuator comprises:
• a holder;
• a bobbin to mount an objective lens;
• and
• a plurality of asymmetrical elastic supports movably supporting the bobbin such that B type radial rolling is substantially eliminated to compensate for a curvature of the disc.

An optical pickup for use with a disc, comprising:

• an objective lens;
• and
• a pickup actuator to control a movement of the objective lens and to record information on and/or to reproduce information from the disc, wherein the pickup actuator comprises:
• a holder;
• a bobbin to mount an objective lens;
• a magnetic driving portion to drive the bobbin in a focusing direction and/or a tracking direction;
• and
• a plurality of asymmetrical elastic supports movably supporting the bobbin such that the bobbin driven by the magnetic driving portion produces only A and C type radial rolling to compensate for a curvature of the disc.

An optical recording/reproducing apparatus for use with a disc, comprising:

• a spindle motor which rotates the disc;
• an optical pickup movably disposed in a radial direction with respect to the disc by a pickup actuator;
• a driving portion to drive the spindle motor and the optical pickup;
• and
• a controlling portion to control a movement of the optical pickup, wherein the pickup actuator comprises:
• a holder;
• a bobbin to mount an objective lens;
• and
• a plurality of asymmetrical elastic supports movably supporting the bobbin such that B type radial rolling is substantially eliminated to compensate for a curvature of the disc.

An optical recording/reproducing apparatus for use with a disc, comprising:

• a spindle motor which rotates the disc;
• an optical pickup movably disposed in a radial direction with respect to the disc by a pickup actuator;
• a driving portion to drive the spindle motor and the optical pickup;
• and
• a controlling portion to control a movement of the optical pickup, wherein the pickup actuator comprises:
• a holder;
• a bobbin to mount an objective lens;
• a magnetic driving portion to drive the bobbin in a focusing direction and/or a tracking direction;
• and
• a plurality of asymmetrical elastic supports movably supporting the bobbin such that the bobbin driven by the magnetic driving portion produces only A and C type radial rolling to compensate for a curvature of the disc.