Optical: systems and elements – Single channel simultaneously to or from plural channels
Reexamination Certificate
2005-02-22
2005-02-22
Dang, Hung Xuan (Department: 2873)
Optical: systems and elements
Single channel simultaneously to or from plural channels
C359S813000, C359S814000, C359S823000, C359S824000
Reexamination Certificate
active
06859325
ABSTRACT:
This invention relates to an objective lens driving device which moves an objective lens; an optical pickup device, comprising this objective lens driving device, which condenses a light beam onto the information recording surface of an optical disc; and an optical information recording and/or reproduction device, comprising this optical pickup device, which drives in rotation an optical disc and moves the optical pickup device to record and/or reproduce information signals onto or from the information recording surface. Two printed coil boards, with a first printed coil with a first shape formed on at least one face and a second printed coil with a second shape formed on the other face, are provided in parallel in an objective lens driving device of this invention, and a moveable portion on which an objective lens is provided is connected with the two printed coil boards; also, a magnet is positioned between the two printed coil boards provided in parallel. A driving current is supplied to each of the first and second printed coils to drive the objective lens in the vertical and/or lateral directions. By means of the objective lens driving device of this invention, twice the propelling force is generated by the two printed coil boards positioned on either side of the magnet, so that driving control of the objective lens can be performed satisfactorily using a simple construction.
REFERENCES:
patent: 5949590 (1999-09-01), Hong
patent: 6341104 (2002-01-01), Yamaguchi et al.
patent: 8-194963 (1996-07-01), None
patent: 11-259883 (1999-09-01), None
patent: 2000-298856 (2000-10-01), None
patent: 2001-28137 (2001-01-01), None
patent: 2001-118266 (2001-04-01), None
Kato Norihiro
Kubo Takeshi
Suzuki Junichi
Tanaka Tetsu
Dang Hung Xuan
Kananen Ronald P.
Martinez Joseph
Rader & Fishman & Grauer, PLLC
Sony Corporation
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