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:
Jul. 28, 2009
Filed:
Sep. 27, 2007
Hisamichi Sekine, Tokyo, JP;
Yoshihiro Okuyama, Yamagata, JP;
Masahiro Ishikawa, Yamagata, JP;
Mitsumi Electric Co., Ltd., Tokyo, JP;
Abstract
A laser diode driver for driving laser light sources of a N-wavelength optical pickup capable of recording on and playing N types of optical discs by using N laser beams having different wavelengths, the N-wavelength optical pickup including first to N-th laser diodes for emitting first to N-th laser beams as the laser light sources and one front monitor for monitoring intensity of the first to N-th laser beams, the laser diode driver comprising a current/voltage conversion amplifier for converting a monitor current monitored by the front monitor into a monitor voltage and outputting the monitor voltage as a monitor output signal, wherein N is an integer which is two or more.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile