Patent · US Expired

Circuit apparatus and method for operating a lamp

US7053561B2 · kind B2 · utility

5Cited by

8References

3Claims

0Family size

Assignee

Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventors

Siegfried Mayer · Leinfelden, DE
Arwed Storm · Dachau, DE

Key dates

Filing date	Jul 23, 2003
Grant date	May 30, 2006
Priority date	—
Expiry date	Aug 30, 2023

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S315/07
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The current through the components of a half-bridge of an electronic ballast is intended to be limited during the starting phase. For this purpose, the gate of a half-bridge transistor (T2) is driven by a current limiting circuit (D1, D2, D3, T3, C3) in such a way that the current through the transistors (T1, T2) is limited during the starting phase, whereas it remains unlimited during the glow phase and burning phase of the lamp (LA).

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