Patent · US Expired

Discharge lamp

US6157129A · kind A · utility

1Cited by

3References

16Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Bernd Rausenberger · Aachen, DE
Dieter Leers · Stolberg, DE
Horst Dannert · Besigheim, DE
Klaus Lohn · Simmerath, DE
Martin Ossmann · Aachen, DE

Key dates

Filing date	Oct 2, 1998
Grant date	Dec 5, 2000
Priority date	—
Expiry date	Oct 2, 2018

Classification

Technology area (CPC H)Electricity
CPC primaryH01J61/56
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The discharge lamp comprises a piezotransformer and at least one of the lamp electrodes comprises a secondary side of the piezotransformer. Since the piezotransformer functions as a lamp electrode, as a ballast choke and as a transformer, the discharge lamp can be operated by means of a relatively simple and cheap ballast circuit.

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