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. 11, 2010
Filed:
Oct. 16, 2006
Masaru Kijima, Kanagawa, JP;
Kazuhiro Sakai, Kanagawa, JP;
Tsutomu Hamada, Kanagawa, JP;
Yoshihide Sato, Kanagawa, JP;
Masaru Kijima, Kanagawa, JP;
Kazuhiro Sakai, Kanagawa, JP;
Tsutomu Hamada, Kanagawa, JP;
Yoshihide Sato, Kanagawa, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
An optical transmitter includes a light-emitting element, a driving circuit, a temperature detection unit, a storage device and a control circuit. The driving circuit causes, based on an input signal, the light-emitting element to emit an optical signal having a pulse shape. The temperature detection unit detects an ambient temperature of the light-emitting element. The storage device stores temperature characteristics information of the light-emitting element. The control circuit controls the driving circuit based on the ambient temperature detected by the temperature detection unit and the temperature characteristic information stored in the storage device, so that an extinction ratio of the optical signal having the pulse shape becomes substantially constant.