Patent · US Expired

Low-pressure mercury-vapor discharge lamp

US6646365B1 · kind B1 · utility

6Cited by

5References

4Claims

0Family size

Assignee

KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

Cornelis Johannes Maria Denissen · Nuth, NL
Cornelis Reinder Ronda · Aachen, DE
Volker Weiler · Aachen, DE
Klaus Gawron · Aachen, DE

Key dates

Filing date	Nov 20, 2000
Grant date	Nov 11, 2003
Priority date	—
Expiry date	Dec 18, 2021

Classification

Technology area (CPC H)Electricity
CPC primaryH01J61/72
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A low-pressure mercury-vapor discharge lamp has a discharge vessel with a filling of mercury and an inert gas. Electrodes in the discharge space have electrode shields, which operate at temperatures above 450° C. An inner surface of the electrode shield may have a heat-absorbing coating, for example a carbon film. The electrode shield may be supported by a support wire, at least a part of which is made from stainless steel. A lamp according to the invention has comparatively low mercury consumption.

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