The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 10, 2009
Filed:
Sep. 29, 2006
Shigeo Nakamura, Odawara, JP;
Takeshi Shimano, Yokohama, JP;
Masaya Horino, Ishioka, JP;
Irizo Naniwa, Odawara, JP;
No-cheol Park, Seoul, KR;
Jeonghoon Yoo, Seoul, KR;
Dong-ju Lee, Seoul, KR;
Jeseung OH, Seoul, KR;
Chul Park, Seoul, KR;
Shigeo Nakamura, Odawara, JP;
Takeshi Shimano, Yokohama, JP;
Masaya Horino, Ishioka, JP;
Irizo Naniwa, Odawara, JP;
No-Cheol Park, Seoul, KR;
Jeonghoon Yoo, Seoul, KR;
Dong-Ju Lee, Seoul, KR;
Jeseung Oh, Seoul, KR;
Chul Park, Seoul, KR;
Hitachi, Ltd., Tokyo, JP;
Abstract
A small-sized optical disc drive includes one voice coil motor magnet within which a tracking coil and two focusing coils are disposed such that the tracking coil straddles the two poles of permanent magnets that are adjacently disposed. The two focusing coils are disposed on either side of the tracking coil, with each of the two focusing coils being only disposed over one of the permanent magnets.