Patent · US Active

Method for igniting and starting high-pressure discharge lamps

US8450939B2 · kind B2 · utility

0Cited by

6References

5Claims

0Family size

Assignee

OSRAM GmbH · DE

Inventors

Bernd Koch · Berlin, DE
Stefan Lichtenberg · Falkensee, DE

Key dates

Filing date	May 7, 2007
Grant date	May 28, 2013
Priority date	—
Expiry date	May 8, 2028

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02B20/00
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method for igniting and for starting high-pressure discharge lamps is provided. The method may include applying a takeover voltage to the lamp for a predetermined time of a burst; superimposing ignition pulses on the takeover voltage in such a way that the voltage of the ignition pulses and the takeover voltage are added up and an interruption being provided between two bursts; and changing the ignition pulses from burst to burst or within a burst from the positive half-cycle of the takeover voltage to the negative half-cycle of the takeover voltage, and vice versa.

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