Patent · US Expired

Circuit arrangement for operating electrical lamps

US6144568A · kind A · utility

10Cited by

8References

11Claims

0Family size

Assignee

Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventors

Felix Franck · Hersbruck, DE
Theodor Kiermeier · Munich, DE

Key dates

Filing date	May 12, 1999
Grant date	Nov 7, 2000
Priority date	—
Expiry date	May 12, 2019

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S323/905
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to a circuit arrangement for operating electrical lamps which encompasses an invertor (WR) with oscillation build-up circuit (trigger generator), comprising diac (DC1) and drive circuit. The drive circuit comprises a high-pass filter, in particular an RC high-pass filter (R1, C1). As a result, the trigger initiation is shifted closer to the zero crossing of the supply voltage. This means, in turn, that a more sinusoidal power supply current consumption with a smaller proportion of harmonics is obtained. In addition, more stable lamp operation is achieved in combination with power supply segment control dimmers.

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