Patent · US Expired

Low-pressure gas discharge lamp having a mercury-free gas filling with an indium compound

US6972521B2 · kind B2 · utility

3Cited by

17References

14Claims

0Family size

Assignee

KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

Robert Scholl · Roetgen, DE
Rainer Hilbig · Aachen, DE
Achim Koerber · Kerkrade, NL
Johannes Baier · Harsewinkel, DE

Key dates

Filing date	Sep 7, 2001
Grant date	Dec 6, 2005
Priority date	—
Expiry date	Nov 18, 2021

Classification

Technology area (CPC H)Electricity
CPC primaryH01J65/048
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A low-pressure gas discharge lamp provided with a gas discharge vessel containing a mercury-free gas filling with an indium compound in an amount of about 1 to 10 microgram per cubic centimeter and a partial pressure in the range from 1.0 to 30 micro bar, and a buffer gas for emitting radiation in a continuous spectrum in the visible and near UVA regions of the electromagnetic spectrum, which low-pressure gas discharge lamp is also provided with electrodes and a ballast for controlling the ignition and operation of the lamp.

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