OPTICAL PICKUP ACTUATOR DRIVING METHOD AND APPARATUS THEREFOR
First Claim
1. An optical recording and/or reproducing apparatus for use with transferring information with respect to a recording medium, comprising:
- a spindle motor rotating the recording medium;
an optical pickup including an objective lens and an actuator which actuates the objective lens so as to transfer the information with respect to the recording medium; and
a control unit driving the spindle motor and the optical pickup to transfer the information with respect to the recording medium and controlling the actuator of the optical pickup in the radial, track, tilt and focusing directions, wherein the actuator comprises;
a bobbin movably arranged on a base of the actuator;
at least one focus and tilt coil which drives the bobbin in the focus and the tilt directions and at least one track coil which drives the bobbin in the track direction arranged on each of opposite side surfaces of the bobbin;
support members which move the bobbin and are provided to the other side surfaces of the bobbin, wherein the focus and tilt coils and the track coils are not arranged on the other side surfaces of the bobbin; and
magnets arranged to face corresponding sides of the opposite side surfaces of the bobbin.
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Accused Products
Abstract
An optical pickup actuator includes a bobbin. At least one focus coil and at least one track coil are arranged at both sides of the bobbin to secure the remaining sides of the bobbin. The optical pickup actuator can drive an optical pickup in a focus direction, a track direction, and a tilt direction. The focus coil is also used as the tilt coil. An optical pickup actuator is driven by arranging a bobbin on a base of the optical pickup actuator so as to be moved by support members, installing at least one focus and tilt coil to drive the bobbin in focus and tilt directions and at least one track coil to drive the bobbin in a track direction at opposite side surfaces of the bobbin, arranging magnets to face corresponding sides of the opposite side surfaces of the bobbin, and dividing the focus and tilt coils into at least two sets of coils and applying an input signal to each of the sets. Since driving in the focus direction and the tilt direction can be controlled together by a single coil, the number of the support members can be reduced and the defective ratio can be lowered. Accordingly, the three axes driving and the four axes driving can be stably implemented.
5 Citations
10 Claims
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1. An optical recording and/or reproducing apparatus for use with transferring information with respect to a recording medium, comprising:
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a spindle motor rotating the recording medium;
an optical pickup including an objective lens and an actuator which actuates the objective lens so as to transfer the information with respect to the recording medium; and
a control unit driving the spindle motor and the optical pickup to transfer the information with respect to the recording medium and controlling the actuator of the optical pickup in the radial, track, tilt and focusing directions, wherein the actuator comprises;
a bobbin movably arranged on a base of the actuator;
at least one focus and tilt coil which drives the bobbin in the focus and the tilt directions and at least one track coil which drives the bobbin in the track direction arranged on each of opposite side surfaces of the bobbin;
support members which move the bobbin and are provided to the other side surfaces of the bobbin, wherein the focus and tilt coils and the track coils are not arranged on the other side surfaces of the bobbin; and
magnets arranged to face corresponding sides of the opposite side surfaces of the bobbin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification