FLUORESCENT COMPOSITIONS AND LOW-VELOCITY ELECTRON EXCITED FLUORESCENT DISPLAY DEVICES UTLIZING THE SAME

摘要

Fluorescent compositions which contain zinc 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 rod light under low-velocity electron excitation, said group consisting of a copper and-aluminium activated zinc cadmium sulfide phosphor ¢(Zn1-x, Cdx)S:Cu, Al, wherein 0?x?0.1!, a cerium activated yttrium aluminium gallium oxide phosphor ¢Y3(Al3-y, Gay)5O12:Ce, wherein 0?y?0.5!, a manganese activated zinc silicate phosphor (Zn2SiO4:Mn), a terbium activated yttrium lanthanum oxysulfide phosphor ¢(Y1-z, Laz)2O2S: Tb, wherein 0?z?1!, a europium activated strontium gallium sulfide phosphor (SrGa2S4:Eu2+), a silver activated zinc sulfide phosphor (ZnS:Ag), and a europium activated yttrium oxysulfide phosphor (Y2O2S:Eu).