Patent ID: 6808829
Filing Date: 2004-10-26
Classification: C09K,Y10S

Abstract:
An image-display device comprisinga faceplate formed with a phosphor layer, and a device adapted to apply an electron beam to said phosphor layer, wherein said phosphor layer consists of a ZnS phosphor which is expressed by a general formula: Zn (1âˆ’x)MIIAxS:MIB,MIII whereMIIA is at least one IIA element selected from the group of Be, Mg, Ca, Sr and Ba; MIIB is at least one IB element selected from the group of Cu, Ag and Au; MIII is a III element including at least one of Al and Ga; and a solubility x is 0wherein a crystal structure of said ZnS phosphor is a compound crystal form comprising a hexagonal form (&agr;) and a cubic form (&bgr;), wherein a composition formula for said crystal structure is a formula &agr;a&bgr;(1âˆ’a), a solubility &agr; is 0