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:
May. 29, 2007
Filed:
Jul. 25, 2005
Applicants:
Shintaro Takehara, Yokohama, JP;
Katsuo Iwata, Tokyo, JP;
Maho Kuwahara, Tokyo, JP;
Sumitaka Maruyama, Yokohama, JP;
Inventors:
Shintaro Takehara, Yokohama, JP;
Katsuo Iwata, Tokyo, JP;
Maho Kuwahara, Tokyo, JP;
Sumitaka Maruyama, Yokohama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 15/52 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to an optical head device and an optical disk unit using the same. The optical head device includes a relay lens control unit to control at least one of lenses of a relay lens unit based on an output signal outputted from a first optical detector and a power control circuit to control an intensity of a light beam emits from a light source.