| 摘要 |
Fluorescent compositions which contain indium oxide and one phosphor selected from the group hereinafter defined in a weight ratio within the range of 1/9 to 9/1, and fluorescent display devices having said fluorescent compositions in the form of a fluorescent screen, which can emit green, blue or red light under low-velocity electron excitation, said group consisting of a terbium activated lanthanum oxysulfide phosphor or a terbium activated lanthanum yttrium oxysulfide phosphor [(La1-x,Yx)2O2S:Tb, wherein 0</=x<1], a copper and aluminium activated zinc cadmium sulfide phosphor [(Zn1-x,Cdx)S:Cu, Al, wherein 0</=x</=0.1], a europium activated strontium gallium sulfide phosphor (SrGa2S4:Eu2+), a cerium activated yttrium aluminium gallate phosphor [Y3(Al1-y,Gay)5O12:Ce, wherein 0</=y</=0.5], a manganese activated zinc silicate phosphor (Zn2SiO4:Mn), a terbium activated yttrium oxysulfide phosphor (Y2O2S:Tb), a silver activated zinc sulfide phosphor (ZnS:Ag), a europium activated yttrium oxysulfide phosphor (Y2O2S:Eu), a europium activated yttrium oxide phosphor (Y2O3:Eu), and a europium activated yttrium vanadate phosphor (YVO4:Eu).
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