Patent · US Expired

Operating device for gas discharge lamp

US6677716B2 · kind B2 · utility

3Cited by

4References

8Claims

0Family size

Assignee

Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventors

Bernd Rudolph · Forstern, DE
Arwed Storm · Dachau, DE

Key dates

Filing date	Dec 20, 2002
Grant date	Jan 13, 2004
Priority date	—
Expiry date	Dec 20, 2022

Classification

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

Abstract

Free-running half-bridge inverter (HP) for operating gas discharge lamps having a current transformer as a feedback device. The half-bridge transistors (T1, T2) are essentially voltage controlled transistors (MOSFET). The drive circuits (1, 2) for the half-bridge transistors (T1, T2) contain a voltage threshold value switch (D2, R2) which, on reaching its voltage threshold, essentially carries a current which is proportional to the load current of the half-bridge inverter (HB).

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