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:
Oct. 04, 1988
Filed:
May. 08, 1987
Applicant:
Inventors:
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
315224 ; 315244 ; 315290 ; 315292 ; 315226 ; 315D / ;
Abstract
To operate a fluorescent lamp having a lamp operating voltage of to about 0 V from a power supply having a nominal voltage level below lamp operating voltage, and without use of a voltage doubler circuit or a transformer to increase the power supply voltage, the power supply voltage is rectified, chopped, and then applied to the fluorescent lamp through a voltage increasing circuit which is formed as an LC resonance circuit. The inductive component can be formed by the current limiting choke, already present in a typical fluorescent lamp circuit, and the capacitative component by a small capacitor, for example of 6 nF value, connected to the choke to form a series resonance circuit.