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. 18, 2008
Filed:
Sep. 28, 2004
Manabu Ochi, Fujisawa, JP;
Hiroshi Ogasawara, Yokohama, JP;
Hirofumi Taguchi, Yokohama, JP;
Seiichi Katou, Tsuchiura, JP;
Manabu Ochi, Fujisawa, JP;
Hiroshi Ogasawara, Yokohama, JP;
Hirofumi Taguchi, Yokohama, JP;
Seiichi Katou, Tsuchiura, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Media Electronics Co., Ltd., Mizusawa-shi, Iwate-ken, JP;
Abstract
An optical pickup apparatus comprises a laser beam source to generate laser beam, and a laser driving circuit to drive the laser beam source. The laser driving circuit is connected to a flexible substrate and arranged in a groove or hole provided in the vicinity of that portion of an optical pickup housing, to which the laser beam source is fixed. The laser driving circuit is connected through a heat conduction member to an upper cover among upper and lower covers, the upper cover being close to the laser driving circuit. Thereby, heat generated from the laser driving circuit is conducted through the heat conduction member to the upper cover to be transferred outside the optical pickup apparatus while being scattered in an inplane direction of the upper cover.