Patent · US Expired

Luminescent screen containing phosphor particles coated with MoO.sub.3

US5879795A · kind A · utility

2Cited by

6References

4Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Markus Haase · Aachen, DE
Helmut Bechtel · Aachen, DE
Wolfram Czarnojan · Aachen, DE
Joseph Lauter · Aachen, DE

Key dates

Filing date	Dec 11, 1995
Grant date	Mar 9, 1999
Priority date	—
Expiry date	Dec 11, 2015

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2991
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

The invention relates to a display screen comprising a phosphor composition of a sulphide and/or selenide-containing phosphor which is provided with a coating which comprises molybdenum (VI)-trioxide. In such display screens, the advantages of the efficient sulphide or selenide-containing phosphors can be used and said display screens remain bright and rich in contrast for a long period of time because the coating, which comprises molybdenum (VI)-trioxide, surprisingly acts as a stabilizing protective coating which limits the corrosion processes in sulphide and/or selenide-containing phosphors induced by low-energy radiation.

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