Patent · US Active

Controlling a lamp ballast

US7834552B2 · kind B2 · utility

1Cited by

4References

28Claims

0Family size

Assignee

Infineon Technologies Austria AG · AT

Inventors

Martin Feldtkeller · Munich, DE
Antoine Fery · Munich, DE
Michael Herfurth · Gilching, DE

Key dates

Filing date	Jul 17, 2007
Grant date	Nov 16, 2010
Priority date	—
Expiry date	Sep 14, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH05B41/2828
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method and apparatus for providing electrical current to a lamp, detecting a power supply voltage outage, detecting a return of the power supply voltage, determining how long the power supply voltage outage lasted, and preheating the lamp responsive to determining that the power supply voltage outage lasted greater than a threshold amount of time.

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