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US 6,714,364 B2Granted
Optical pick-up actuator
AssigneeLG Electronics Inc.
InventorMin Suk Suh
Life of this patent
Estimating the term…
Abstract
An optical pick-up actuator of the present invention includes a lens holder having a objective lens and tracking and focusing coils, a frame for raising the lens holder in a magnetic field using a suspension wire, and a tilt driving magnetic circuit for driving the actuator in a third direction as well as focusing and tracking directions.
Claims13
An optical pick-up actuator comprising:
- a lens holder for housing an objective lens;
- a tracking system for moving the lens holder in a first plane;
- a focusing system for moving the lens holder in a second plane approximately perpendicular to the first plane;
- an elongated frame having first and second opposite ends, said frame comprising a support means connected to said first and second opposite ends for supporting said lens holder in a first suspended state with respect to the first plane;
- and
- a magnetic system in operational relationship with the first and second opposite ends of the frame, such that the magnetic system generates a magnetic field and at least the first end of the frame moves within the magnetic field to cause the frame to rotate about an elongated shaft running through the frame's first axis positioned between said first and second opposite ends of the frame, causing the support means to rotate the lens holder about the first axis to a second suspended state with respect to the first plane.
3 more elements
An optical pick-up system comprising:
- a lens holder for housing an objective lens;
- a vertical and horizontal moving system for moving the lens holder in first and second planes, wherein said first and second planes are approximately perpendicular;
- a frame having first and second opposite ends;
- first and second supportive braces, each respectively extending from first and second opposite ends of the frame for supporting said lens holder in a first suspended state with respect to the first plane, and
- an electromagnetic mechanism comprising:
- first and second coils, respectively connected to said first and second opposite ends of the frame;
- and
- first and second magnets respectively located opposite said first and second coils;
- wherein the first and second magnets generates at least a magnetic field to interact with a current flowing in said first and second coils such that an electromagnetic force is generated as a result of said interaction to move said first and second ends of the frame within the magnetic field and wherein the electromagnetic force is translated into a rotational movement upon acting on the first and second ends of the frame to cause the frame to rotate about an elongated shaft running through the frame's first axis positioned between said first and second opposite ends of the frame.
6 more elements
Dependencies are inferred from the claim text.