Patent · US Expired

Luminescent screen

US5684358A · kind A · utility

0Cited by

2References

15Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Markus Haase · Aachen, DE
Helmut Bechtel · Aachen, DE
Wolfram Czarnojan · Aachen, DE
Dieter Wadow · Aachen, DE

Key dates

Filing date	Nov 22, 1995
Grant date	Nov 4, 1997
Priority date	—
Expiry date	Nov 22, 2015

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K11/883
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 is composed of germanium disulphide and/or germanium diselenide. In such a display screen, in particular a low-energy cathode ray display screen, the advantages of the efficient sulphide or selenide-containing phosphors can be used and said display screen remains bright and rich in contrast for a long period of time because the coating, which is composed of germanium disulphide and/or germanium diselenide, 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.