Patent ID: 6809781
Filing Date: 2004-10-26
Classification: C09K,G02F,H05B

Abstract:
A phosphor composition for a backlight source of a liquid crystal display (â€œLCDâ€ ), said phosphor composition comprising at least a phosphor emitting blue light, at least a phosphor emitting green light, and at least a phosphor emitting red light; wherein said at least a phosphor emitting blue light is selected from the group consisting of (Sr,Ca,Ba,Mg)10(PO4)6(F,Cl,Br,OH):Eu2+; (Ba,Sr,Ca)MgAl10O17:Eu2+; (Sr,Ca)10(PO4)6â€¢nB2O3:Eu2+, wherein 02O5â€¢0.16 B2O3:Eu2+; Sr2Si3O8â€¢2 SrCl2:Eu2+; Ba3MgSi2O8:Eu2+; Sr4Al14O25:Eu2+; BaAl8O13; Eu2+; and mixtures thereof; said at least a phosphor emitting green light is selected from the group consisting of (Ba,Sr,Ca)MgAl10O17:Eu2+,Mn2+; (Ba,Sr,Ca)Al2O4:Eu2+; (Y,Gd,Lu,Sc,La)BO3:Ce3+,Tb3+; (Ba,Sr,Ca)2SiO4:Eu2+; (Ba,Sr,Ca)2(Mg,Zn)Si2O7:Eu2+; (Sr,Ca,Ba)(Al,Ga,In)2S4:Eu2+; (Y,Gd,Tb,La,Sm,Pr,Lu)x(Al,Ga,In)yO12:Ce3+, wherein x is in the range from about 2.8 to and including 3, and y is in the range from about 4.9 to about 5.1; (Sr,Ca,Ba,Mg,Zn)2P2O7:Eu2+,Mn2+; (Ca,Sr,Ba,Mg)10(PO4)6(F,Cl,Br,OH): Eu2+, Mn2+; (Ca,Sr,Ba)8(Mg,Zn)(SiO4)4(Cl,F)2:Eu2+,Mn2+; and mixtures thereof; and said at least a phosphor emitting red light is selected from the group consisting of (Gd,Y,Lu,La)2O3:Eu3+,Bi3+; (Gd,Y,Lu,La)2O2S:Eu3+, Bi3+; (Gd,Y,Lu,La)VO4:Eu3+,Bi3+; SrS:Eu2+; SrY2S4:Eu2+; CaLa2S4:Ce3+; (Ca,Sr)S:Eu2+; 3.5 MgOâ€¢0.5 MgF2â€¢GeO2:Mn4+; (Ba,Sr,Ca)MgP2O7:Eu2+,Mn2+; and mixtures thereof.