Low-velocity electron excited fluorescent display device

Details Low-velocity electron excited fluorescent display device Low-velocity electron excited fluorescent display device

1978-03-23

1980-06-17

Cooper, Jack

Electric lamp and discharge devices

With luminescent solid or liquid material

Vacuum-type tube

H01J 2920, C09K 1118

Patent

active

042086132

ABSTRACT:
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 [(La.sub.1-x,Y.sub.x).sub.2 O.sub.2 S:Tb, wherein 0.ltoreq.x<1], a copper and aluminium activated zinc cadmium sulfide phosphor [(Zn.sub.1-x,Cd.sub.x)S:Cu, Al, wherein 0.ltoreq.x.ltoreq.0.1], a europium activated strontium gallium sulfide phosphor (SrGa.sub.2 S.sub.4 :Eu.sup.2+), a cerium activated yttrium aluminium gallate phosphor [Y.sub.3 (Al.sub.1-y,Ga.sub.y).sub.5 O.sub.12 :Ce, wherein 0.ltoreq.y.ltoreq.0.5], a manganese activated zinc silicate phosphor (Zn.sub.2 SiO.sub.4 :Mn), a terbium activated yttrium oxysulfide phosphor (Y.sub.2 O.sub.2 S:Tb), a silver activated zinc sulfide phosphor (ZnS:Ag), a europium activated yttrium oxysulfide phosphor (Y.sub.2 O.sub.2 S:Eu), a europium activated yttrium oxide phosphor (Y.sub.2 O.sub.3 :Eu), and a europium activated yttrium vanadate phosphor (YVO.sub.4 :Eu).

REFERENCES:
patent: 3906269 (1975-09-01), Tanji
Nitta et al. "Chem. Abstracts" vol. 83, 1975, 140923s.

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