Patent · US Active

Electronic ballast and method for operating at least one first and second discharge lamp

US8441200B2 · kind B2 · utility

0Cited by

6References

9Claims

0Family size

Assignee

OSRAM Gesellschaft mit beschraenkter Haftung · DE

Inventors

Olaf Busse · Munich, DE
Siegfried Mayer · Leinfelden, DE
Arwed Storm · Dachau, DE

Key dates

Filing date	Nov 9, 2007
Grant date	May 14, 2013
Priority date	—
Expiry date	Jun 14, 2028

Classification

Technology area (CPC H)Electricity
CPC primaryH05B41/382
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electronic ballast for operating at least two discharge lamps is provided, which may include a starting detection apparatus for detecting whether one of the discharge lamps has been started; wherein a drive circuit includes an input, which is coupled to a starting detection apparatus, wherein a threshold value entry apparatus is designed to enter a second threshold value for a setpoint value of a total current through at least two inductances, wherein the second threshold value has a smaller magnitude than a first threshold value; and wherein the drive circuit is designed to drive a first electronic switch and a second electronic switch taking into consideration the first threshold value as setpoint value prior to detection of the starting of a discharge lamp by the starting detection apparatus, and taking into consideration the second threshold value as setpoint value.

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