Patent · US Expired

Aluminate phosphor with a polyphosphate coating

US5998047A · kind A · utility

12Cited by

5References

8Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Helmut Bechtel · Aachen, DE
Wolfram Czarnojan · Aachen, DE
Walter Mayr · Alsdorf, DE
Thomas Justel · Witten, DE
Hans Nikol · Aachen, DE
Cornelis Rhonda · Aachen, DE

Key dates

Filing date	Jun 25, 1998
Grant date	Dec 7, 1999
Priority date	—
Expiry date	Jun 25, 2018

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2991
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A plasma display device with a phosphor screen, comprising a phosphor composition of an UV-phosphor furnished with a coating which includes one or more catena-polyphosphates of metals of the group formed by the alkaline earth metals, zinc, cadmium and manganese, can effectively be used to counteract degradation of the phosphor by UV-excitation.

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