Optical pickup actuator driving method and apparatus therefor
First Claim
1. A method of driving an optical pickup actuator having a bobbin, a support member, focus and tilt coils, track coils, and magnets, the method comprising:
- arranging the bobbin on a base of the optical pickup actuator so as to be moved by the support member;
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 each of opposite side surfaces of the bobbin;
arranging the 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.
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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
60 Claims
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1. A method of driving an optical pickup actuator having a bobbin, a support member, focus and tilt coils, track coils, and magnets, the method comprising:
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arranging the bobbin on a base of the optical pickup actuator so as to be moved by the support member;
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 each of opposite side surfaces of the bobbin;
arranging the 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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25. A method of driving an optical pickup actuator having a bobbin, a support member, focus and tilt coils, track coils, and magnets, the method comprising:
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arranging the bobbin on a base of the optical pickup actuator so as to be moved by the support member;
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 each of opposite side surfaces of the bobbin;
arranging the magnets to face corresponding sides of the opposite side surfaces of the bobbin; and
independently inputting a signal to each focus and tilt coil.
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40. An optical pickup actuator comprising:
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a bobbin movably arranged on a base of the optical pickup actuator;
at least one focus and tilt coil which drives the bobbin in focus and tilt directions and at least one track coil which drives the bobbin in a 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 (41, 42, 43, 44, 45, 46, 47, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60)
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48. A method of driving an optical pickup actuator comprising a support member, a bobbin having at least one focus and tilt coil and at least one track coil on each of opposite side surfaces of the bobbin, wherein the focus and tilt coils and the track coils are not arranged on other sides of the bobbin, and magnets arranged to face corresponding sides of the opposite side surfaces of the bobbin, the method comprising:
applying an input signal to the focus and tilt coils to drive the optical pickup actuator in focus and tilt direction, wherein the applying of the input signal comprises one of;
inputting the input signal to each of sets, wherein the focus and tilt coils are divided into at least two sets of coils, and inputting the input signal independently to each focus and tilt coil.
Specification