Patent · US Expired

Circuit arrangement for igniting and operating gas discharge lamps

US4714862A · kind A · utility

6Cited by

4References

11Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Horst Dannert · Besigheim, DE
Hans G. Ganser · Stolberg, DE
Ralf Schafer · Marbach, DE
Hans Peter Stormberg · Stolberg, DE

Key dates

Filing date	Oct 15, 1985
Grant date	Dec 22, 1987
Priority date	—
Expiry date	Oct 15, 2005

Classification

Technology area (CPC H)Electricity
CPC primaryH05B41/042
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A circuit arrangement for igniting and operating gas discharge lamps comprises a choke coil (1) connected between a lamp (2) and an a.c. supply source. The choke coil has an inductance L and an ignition device (3) is connected to the lamp. A capacitor (9) having a capacitance C is connected in parallel with at least a part of the choke coil in order to pass an ignition current to the lamp that is higher than the normal lamp operating current. The relationship betweeen the capacitive reactance of the capacitor and the inductive reactance of the choke coil is 1/.omega.C>3.omega.L.

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