Patent · US Expired

Luminescent screen including a luminescent zeolite

US5900695A · kind A · utility

2Cited by

4References

8Claims

0Family size

Assignee

U.S. Phillips Corp. · US

Inventors

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

Key dates

Filing date	Feb 7, 1997
Grant date	May 4, 1999
Priority date	—
Expiry date	Feb 7, 2017

Classification

Technology area (CPC H)Electricity
CPC primaryH01J29/20
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A luminescent screen includes a luminescent zeolite containing rare earths, such as terbium (Tb), and europium (Eu), and an oxide of a transition metal, such as, molybdenum (Mo), tungsten (W), niobium (Nb), and tantalum (Ta). It was found that a zeolite containing both terbium, and tungsten oxide had an absorbability that was approximately 60 times as high as that of a zeolite containing only terbium, thus increasing the luminescent efficiency of the zeolite.

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