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

1979-05-01

Cooper, Jack

Electric lamp and discharge devices

With luminescent solid or liquid material

Vacuum-type tube

H01J 2920, H01J 2100

Patent

active

041526236

ABSTRACT:
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 red light under low-velocity electron excitation, said group consisting of 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 cerium activated yttrium aluminium gallium oxide 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 lanthanum oxysulfide phosphor [(Y.sub.1-z, La.sub.z).sub.2 O.sub.2 S: Tb, wherein 0.ltoreq.z.ltoreq.1], a europium activated strontium gallium sulfide phosphor (SrGa.sub.2 S.sub.4 :Eu.sup.2+), a silver activated zinc sulfide phosphor (ZnS:Ag), and a europium activated yttrium oxysulfide phosphor (Y.sub.2 O.sub.2 S:Eu).

REFERENCES:
patent: 3133027 (1964-05-01), Lehmann
patent: 3152995 (1964-10-01), Strock
patent: 3649553 (1972-03-01), Tanaka et al.
patent: 3737705 (1973-06-01), Takeda et al.
patent: 3846662 (1974-11-01), Hooker
patent: 3906269 (1975-09-01), Tanji

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