Patent · US Expired

Low-pressure mercury discharge lamp comprising an outer bulb

US6888302B2 · kind B2 · utility

3Cited by

11References

9Claims

0Family size

Assignee

KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

Thomas Juestel · Aachen, DE
Cornelis Reinder Ronda · Aachen, DE
Hans Nikol · Aachen, DE

Key dates

Filing date	May 24, 2001
Grant date	May 3, 2005
Priority date	—
Expiry date	Dec 21, 2021

Classification

Technology area (CPC H)Electricity
CPC primaryH01J61/44
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A low-pressure mercury discharge lamp comprising an inner bulb, which forms a gas discharge vessel and the wall of which is made of a material which is transparent to electromagnetic radiation and is coated with a phosphor, and comprising an outer bulb surrounding the inner bulb, the wall of which contains an UV-A phosphor, and comprising means for generating and maintaining a low-pressure mercury gas discharge.

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