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:
Aug. 06, 2002
Filed:
Nov. 03, 2000
Applicant:
Inventors:
Kenichiro Takahashi, Osaka, JP;
Kazuhiko Ito, Osaka, JP;
Takayuki Imai, Osaka, JP;
Mamoru Takeda, Kyoto, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B 3/702 ;
U.S. Cl.
CPC ...
H05B 3/702 ;
Abstract
A fluorescent lamp operating apparatus comprises a power switching element electrically connected to a fluorescent lamp having a pair of electrodes, and means for limiting the current flowing through the power switching element by controlling its conductance so as to prevent the power switching element from being broken by a large current flowing from the power line through the fluorescent lamp when the impedance between the pair electrodes decreases from infinity at the start-up of the fluorescent lamp.