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:
Mar. 22, 2005
Filed:
Aug. 14, 2001
Yoshiaki Yamauchi, Minori, JP;
Katsuhiko Kimura, Chiyoda, JP;
Mitsuo Satake, Yokohama, JP;
Manabu Ochi, Chiyoda, JP;
Seiichi Kato, Chiyoda, JP;
Yoshiaki Yamauchi, Minori, JP;
Katsuhiko Kimura, Chiyoda, JP;
Mitsuo Satake, Yokohama, JP;
Manabu Ochi, Chiyoda, JP;
Seiichi Kato, Chiyoda, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Media Electronics Co., Ltd., Mizusawa, JP;
Abstract
In a disc driving apparatus, wherein a laser diode and a laser driver circuit board are mounted on a pickup housing in thermal contact therewith and are disposed adjacent to each other, a heat separation member is provided between the laser diode and the laser driver circuit board for effecting thermal separation therebetween, thereby reducing the thermal interference between the heat-generating elements that are adjacent to each other in the optical pickup. This makes it possible to protect the heat-generating elements from being deteriorated, leading to a reduction in the lifetime thereof, as well as, to improve the reliability thereof.