Patent ID: 8030834

Claim:
A flat display device comprising a phosphor layer comprising phosphors coated with at least a heat-resistant material selected from the group consisting of a Group II atom-containing material, a Group III atom-containing material, and a Group IV atom containing material, wherein the heat-resistant material comprises at least one selected from the group consisting of TiO, TiN, TiC, and ZrN; wherein the phosphor is selected from the group consisting of a red phosphor including at least a phosphor selected from the group consisting of a Y(V,P)O 4 :Eu phosphor, a Y 2 O 3 :Eu phosphor, and a (Y,Gd)BO 3 :Eu phosphor; a green phosphor including at least a phosphor selected from the group consisting of a LaPO 4 :Ce,Tb phosphor, a ZnGa 2 O 4 :Mn phosphor, a ReBO 3 :Tb phosphor where Re is a rare earth element or a combination of rare earth elements, a Zn 2 SiO 4 :Mn phosphor, and a BaMgAl 10 O 17 :Eu,Mn phosphor; and a blue phosphor including at least a phosphor selected from the group consisting of a BaMgAl 10 O 17 :Eu phosphor, a BaMgAl 14 O 23 :Eu phosphor, a BaMg 2 Al 16 O 27 :Eu phosphor, and a CaMgSi 2 O 6 :Eu phosphor.