Patent · US Expired

Luminescent screen

US5574332A · kind A · utility

3Cited by

1References

8Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Ulrich Kynast · Roetgen, DE
Volker Weiler · Aachen, DE

Key dates

Filing date	Dec 16, 1994
Grant date	Nov 12, 1996
Priority date	—
Expiry date	Dec 16, 2014

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K11/77214
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to a luminescent screen and to a low pressure mercury discharge lamp comprising such a luminescent screen. According to the invention the luminescent screen comprises a zeolite containing trivalent Ce. The luminescent screen exhibits a large quantum efficiency for converting UV radiation of 254 nm into radiation having an emission maximum at approximately 346 nm.

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