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:
Feb. 29, 2000
Filed:
Mar. 03, 1997
Applicant:
Inventor:
Hisako Watanabe, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 38 ;
Abstract
A light emitting element driving circuit which drives a light emitting element including the following. A drive transistor is coupled to a power supply voltage and is provided on a side of an anode of the light emitting element. The drive transistor receives an input signal and supplies the light emitting element with a pulse current and a bias current. A cathode of the light emitting element is connected to a lower potential than the power supply voltage.