Patent Number: 7,786,659

Title: Plasma display with a novel green-silicate phosphor

Abstract: Using Eu.sup.2+ as the luminescence center for a green-emitting phosphor, a plasma display panel and a PDP device using it are configured by using an Eu.sup.2+-activated silicate green-emitting phosphate (Ca.sub.1-xM1.sub.x).sub.2-e.M2.Si.sub.2O.sub.7:Eu.sub.e with improved decay characteristics. In the formula, M1 is at least one element selected from the group containing Sr and Ba; M2 is at least one element selected from the group containing Mg and Zn; and x indicates the mole fraction of the component M1 and e indicates the mole fraction of Eu respectively satisfy the following conditions: 0<x<1 and 0.001.ltoreq.e.ltoreq.0.2.

Inventors: Oaku; Hitoshi (Tokyo, JP), Sakuma; Hirotaka (Kokubunji, JP), Okazaki; Choichiro (Kodaira, JP)

Assignee: Hitachi, Ltd.

International Classification: H01J 11/02 (20060101); H01L 33/00 (20100101); C09K 11/08 (20060101)

Expiration Date: 8/31/12018