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. 11, 2000
Filed:
Dec. 04, 1998
Applicant:
Inventors:
Guan-Chyun Hsieh, Taipei, TW;
Chang-Hua Lin, Taipei, TW;
Assignee:
National Science Council, Taipei, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
315276 ; 315244 ; 3152 / ; 315307 ;
Abstract
A technology for eliminating acoustic resonance in a fluorescent lamp is disclosed in the present invention. The feature of the invention is to provide a harmonic compensating device to work with the fluorescent lamp and its relative peripheral circuits, such that current-dependent sources are provided to modulate the current in the lamp, thereby spreading the harmonic energy of the current in the lamp and eliminating acoustic resonance.