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. 09, 2010
Filed:
Jan. 29, 2007
Manabu Ochi, Fujisawa, JP;
Fumihito Ichikawa, Yokohama, JP;
Hiroyasu Yoshida, Yokohama, JP;
Mitsuo Satake, Yokohama, JP;
Manabu Ochi, Fujisawa, JP;
Fumihito Ichikawa, Yokohama, JP;
Hiroyasu Yoshida, Yokohama, JP;
Mitsuo Satake, Yokohama, JP;
Hitachi Media Electronics Co., Ltd., Iwate-Ken, JP;
Abstract
The present invention provides an optical head for realizing the stable operation by controlling the temperature of the semiconductor laser to a low level by reducing the heat transfer rate from a laser driver IC to a housing in the vicinity of a semiconductor laser, and an optical disc drive using the same. It provides an optical head having a semiconductor laser and a photo detector arranged on one side with respect to a straight line through the center of an object lens of an object lens actuator and in parallel to the axis contacted with bearings, and a laser driver IC arranged on the other side with respect to the straight line. Thereby, the distance from the laser driver IC to the semiconductor laser can sufficiently be ensured so that the heat transfer rate from the laser driver IC to the housing can be reduced.