Circuit arrangement and method for operating at least one electric lamp

US7327094B2 · kind B2 · utility

Assignee

• Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventors

• Olaf Busse · Munich, DE
• Markus Heckmann · Munich, DE
• Reinhard Lecheler · Leibnizweg, DE
• Alfons Lechner · Pfaffenhofen an der Ilm, DE
• Siegfried Mayer · Leinfelden, DE
• Thomas Pollischansky · Stadtbergen, DE
• Bernd Rudolph · Forstern, DE
• Bernhard Schemmel · Weßling, DE
• Kay Schmidtmann · Birkenfeld, DE
• Harald Schmitt · Hersbruck, DE
• Thomas Siegmund · West Lafayette, US
• Arwed Storm · Dachau, DE
• Horst Werni · Birkenfeld, DE

Key dates

• Filing date: Jul 6, 2006
• Grant date: Feb 5, 2008
• Expiry date: Jul 6, 2026

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02B20/00
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

The present invention relates to a circuit arrangement for operating at least one electric lamp (LP) having a drive circuit (16), which has at least one terminal for a system voltage (UN) on the input side and at least one terminal for the at least one electric lamp (LP) on the output side; the drive circuit (16) having a control unit (18) and a step-up converter having a step-up converter inductor (L2) and a switch (S1), and the control unit (18) being designed to operate the step-up converter in a discontinuous mode, in which the current (IN) through the step-up converter inductor (L2) has gaps, the duration (▮t) of these gaps being varied. It also relates to an operating method for at least one electric lamp (LP) using such a circuit arrangement.