Patent · US Expired

Power network fluorescent lamp operating circuit

US4775822A · kind A · utility

6Cited by

11References

2Claims

0Family size

Assignee

Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventors

Eugen Statnic · Munich, DE
Wolfgang Tausch · Unterhaching, DE
Water Hirschmann · Munich, DE

Key dates

Filing date	May 8, 1987
Grant date	Oct 4, 1988
Priority date	—
Expiry date	May 8, 2007

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S315/07
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.