Optical pickup actuator, optical pickup, and optical recording and/or reproducing apparatus
View Patent ↗An optical pickup actuator having: a holder positioned at one side of a base; a lens holder on which an objective lens is mounted, a magnetic driving portion having focusing coils, tracking coils, and tilting coils, and a magnet used to drive the lens holder in focusing, tracking, and tilting directions; at least one support member supporting the lens holder, one end of the support member being combined with the holder, and an other end thereof being combined with the lens holder; and wires installed separate from the support member to apply a current to the focusing coil, the tracking coil, and the tilting coil.
1. An optical pickup actuator comprising:
a holder positioned at one side of a base;
a lens holder on which an objective lens is mounted;
a magnetic driving portion having focusing coils, tracking coils, and tilting coils, and a magnet used to drive the lens holder in focusing, tracking, and tilting directions;
at least one support member supporting the lens holder, one end of the support member being combined with the holder, and an other end thereof being combined with the lens holder; and
wires installed separate from the support member, one end of each of the wires being combined with the holder and the other end thereof being directly combined with a corresponding one of the focusing coils, a corresponding one of the tracking coils, and a corresponding one of the tilting coils to apply a current to the focusing coil, the tracking coil, and the tilting coil.
2. The optical pickup actuator of claim 1 , wherein the lens holder is approximately diamond shaped.
3. The optical pickup actuator of claim 1 , wherein the wires are provided separate from the support member such that soldering is not required.
4. The optical pickup actuator of claim 1 , wherein:
the focusing coil is positioned around the lens holder;
the tracking coil is positioned obliquely with respect to the magnet; and
the tilting coil is positioned symmetrically with respect to a tracking direction at a first surface of the lens holder.
5. The optical pickup actuator of claim 1 , wherein:
the focusing coil is positioned around the lens holder;
the tracking coil is positioned inclined to the magnet; and
the tilting coil is symmetrically positioned at a first surface of the lens holder, with respect to a tracking direction.
6. The optical pickup actuator of claim 5 , wherein the titling coil is wound in a triangular shape.
7. The optical pickup actuator of claim 5 , wherein the titling coil is wound in a rectangular shape.
8. The optical pickup actuator of claim 1 , wherein the wires are drawn out from the focusing coil, the tracking coil, and the tilting coil, and are combined with a drive IC.
9. The optical pickup actuator of claim 1 , wherein the magnet is installed in a base placed in a first direction of a path in which light emitted from an optical system transmitting light to the objective lens advances.
10. The optical pickup actuator of claim 1 , wherein:
an optical system transmitting light to the objective lens is positioned inclined with respect to the lens holder; and
the lens holder comprises an inclined portion to prevent blockage of an optical path of light emitted from the optical system.
11. The optical pickup actuator of claim 1 , wherein:
the focusing coil and the tilting coil are combined; and
the tilting and focusing coil is positioned symmetrically with respect to a tracking direction at a first surface of the lens holder.
12. The optical pickup actuator of claim 11 , wherein a first signal, in which a tilting signal having a first phase is added to a focusing signal, and a second signal, in which a tilting signal having a phase different from the first phase is added to the focusing signal, are input into the tilting and focusing coil.
13. The optical pickup actuator of claim 1 , wherein:
the focusing coil, the tracking coil, and the tilting coil are positioned symmetrically with respect to the objective lens; and
the magnet is positioned at opposing sides of the lens holder.
14. The optical pickup actuator of claim 1 , wherein: an optical axis of the objective lens is collinear with a driving axis of the lens holder.
15. An optical pickup, which is installed to be movable in a radial direction of a disc, the optical pickup comprising:
an optical system having an objective lens to record and/or reproduce information on and/or from the disc; and
an optical pickup actuator which controls focusing, tracking, and tilting servos of the objective lens, the optical pickup actuator comprising
a holder positioned at one side of a base,
a lens holder on which the objective lens is mounted,
a magnetic driving portion having focusing coils, tracking coils, and tilting coils, and a magnet used to drive the lens holder in focusing, tracking, and tilting directions,
at least one support member supporting the lens holder, one end of the support member being combined with the holder, and an other end thereof being combined with the lens holder, and
wires installed separate from the support member, one end of each of the wires being combined with the holder and the other end thereof being directly combined with a corresponding one of the focusing coils, a corresponding one of the tracking coils, and a corresponding one of the tilting coils to apply a current to the focusing coil, the tracking coil, and the tilting coil.
16. The optical pickup of claim 15 , wherein the wires are provided separate from the support member such that soldering is not required.
17. The optical pickup of claim 15 , wherein the lens holder is combined with the optical system such that light advances obliquely with respect to the optical pickup actuator.
18. The optical pickup of claim 15 , wherein:
the magnetic driving portion is positioned inclined with respect to a first portion of the optical pickup actuator;
the optical system is an existing optical system; and
the lens holder is approximately diamond shaped, to combine the lens holder with the existing optical system without modification of the existing optical system.
19. The optical pickup of claim 15 , wherein the lens holder is approximately diamond shaped.
20. The optical pickup of claim 15 wherein the lens holder is approximately diamond shaped, such that a first portion of the lens holder is approximately triangular shaped.
21. The optical pickup of claim 20 wherein the lens holder is combined with the optical system such that light advances obliquely with respect to the optical pickup actuator.
22. The optical pickup of claim 15 , wherein:
the focusing coil, the tracking coil, and the tilting coil are positioned symmetrically with respect to the objective lens; and
the magnet is positioned at opposing sides of the lens holder.
23. The optical pickup of claim 22 , wherein:
the focusing coil is positioned around the lens holder;
the tracking coil is positioned inclined with respect to the magnet; and
the tilting coil is positioned symmetrically with respect to a tracking direction at a first surface of the lens holder.
24. The optical pickup of claim 22 , wherein:
the focusing coil is positioned around the lens holder;
the tracking coil is positioned obliquely with respect to the magnet; and
the tilting coil is positioned symmetrically with respect to a tracking direction at a first surface of the lens holder.
25. The optical pickup of claim 15 , wherein the wires are drawn out from the focusing coil, the tracking coil, and the tilting coil, and are combined with a drive IC.
26. The optical pickup of claim 15 , wherein:
the optical system is positioned inclined with respect to the lens holder; and
the lens holder comprises an inclined portion to prevent blockage of an optical path of light emitted from the optical system.
27. An optical recording and/or reproducing apparatus to record and/or reproduce information on and/or from an optical disc, the optical recording and/or reproducing apparatus comprising:
an objective lens;
an optical system;
a lens holder on which the objective lens is mounted; and
an optical pickup actuator to move the lens holder, the optical pickup actuator comprising
a holder positioned at one side of a base,
a magnetic driving portion having focusing coils, tracking coils, and tilting coils, and a magnet used to drive the lens holder in focusing, tracking, and tilting directions,
at least one support member supporting the lens holder, one end of the support member being combined with the holder, and an other end thereof being combined with the lens holder, and
wires installed separate from the support member, one end of each of the wires being combined with the holder and the other end thereof being directly combined with a corresponding one of the focusing coils, a corresponding one of the tracking coils, and a corresponding one of the tilting coils to apply a current to the focusing coil, the tracking coil, and the tilting coil.
28. The apparatus of claim 27 , wherein the wires are provided separate from the support member such that soldering is not required.
29. The apparatus of claim 27 , wherein the lens holder is combined with the optical system such that light advances obliquely with respect to the optical pickup actuator.
30. The apparatus of claim 27 , wherein:
the magnetic driving portion is positioned inclined with respect to a first portion of the optical pickup actuator;
the optical system is an existing optical system; and
the lens holder is approximately diamond shaped, to combine the lens holder with the existing optical system without modification of the existing optical system.
31. The apparatus of claim 27 , wherein the lens holder is approximately diamond shaped.
32. The apparatus of claim 27 wherein the lens holder is approximately diamond shaped, such that a first portion of the lens holder is approximately triangular shaped.
33. The apparatus of claim 32 wherein the lens holder is combined with the optical system such that light advances obliquely with respect to the optical pickup actuator.
34. The apparatus of claim 31 , wherein:
the focusing coil, the tracking coil, and the tilting coil are positioned symmetrically with respect to the objective lens; and
the magnet is positioned at opposing sides of the lens holder.
35. The apparatus of claim 27 , wherein:
the focusing coil is positioned around the lens holder;
the tracking coil is positioned inclined with respect to the magnet, and
the tilting coil is positioned symmetrically with respect to a tracking direction at a first surface of the lens holder.
36. The apparatus of claim 27 , wherein:
the focusing coil is positioned around the lens holder;
the tracking coil is positioned obliquely with respect to the magnet; and
the tilting coil is positioned symmetrically with respect to a tracking direction at a first surface of the lens holder.
37. The apparatus of claim 27 , wherein the wires are drawn out from the focusing coil, the tracking coil, and the tilting coil, and are combined with a drive IC.
38. The apparatus of claim 27 , wherein:
an optical system transmitting light to the objective lens is positioned inclined with respect to the lens holder;
the lens holder comprises an inclined portion to prevent blockage of an optical path of light emitted from the optical system.