Patent · US Expired

Switching apparatus for operating discharge lamps

US6914392B2 · kind B2 · utility

4Cited by

9References

2Claims

0Family size

Assignee

Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventors

Thomas Hanisch · Dresden, DE
Igor Kartashev · Wolfsberg, AT
Arnulf Rupp · Munich, DE

Key dates

Filing date	Jul 2, 2003
Grant date	Jul 5, 2005
Priority date	—
Expiry date	Sep 2, 2023

Classification

Technology area (CPC H)Electricity
CPC primaryH05B41/042
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The following circuit is proposed for discharge lamps having a particularly high starting voltage. An a.c. voltage generator (1) provides a corresponding a.c. voltage. A starting voltage generating device, which comprises a piezo transformer (2), is connected to the a.c. voltage generator (1) and can be connected at its output to a discharge lamp (4), generates a starting voltage from the a.c. voltage. The starting voltage generating device in this case comprises at least one diode (3) which is connected in parallel with the output of the starting voltage generating device. A zero-order pump circuit is thus integrated in the starting circuit. Advantageous here is the use of higher-order pump circuits.

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