Plasma picture screen with red phosphor

US6572785B2 · kind B2 · utility

Assignee

• KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

• Thomas Justel · Witten, DE
• Walter Mayr · Alsdorf, DE
• Hans Nikol · Aachen, DE

Key dates

• Filing date: Dec 19, 2000
• Grant date: Jun 3, 2003
• Expiry date: Dec 19, 2020

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01J2211/42
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A plasma picture screen fitted with a phosphor layer comprising a red phosphor activated by Eu3+ shows an improved red color point (x≧0.64 and y≦0.35) and shorter decay times &tgr;1/10 as compared with the standard phosphor (Y,Gd)BO3. The phosphor according to the invention has a lattice in which the activator Eu3+ occupies a location which has no inversion symmetry.