Patent · US Expired

Drive circuit for a fluorescent lamp with a diagnosis circuit, and method for diagnosis of a fluorescent lamp

US7378807B2 · kind B2 · utility

8Cited by

10References

36Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

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

Key dates

Filing date	Aug 2, 2005
Grant date	May 27, 2008
Priority date	—
Expiry date	Aug 2, 2025

Classification

Technology area (CPC H)Electricity
CPC primaryH05B41/2985
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A drive circuit for at least one fluorescent lamp has a half-bridge circuit for production of a supply voltage a resonant tuned circuit coupled to the half-bridge circuit and to which the at least one fluorescent lamp can be connected, a diagnosis circuit with a resistance element coupled to the resonant tuned circuit, at least one current/voltage converter connected to the resistance element that produces at least one measurement voltage from a current flowing through the resistance element, and an evaluation circuit which is connected to the current/voltage converter and is supplied with the at least one measurement voltage and to a method for diagnosis of a fluorescent lamp.

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