Color television cathode ray tube

Details Color television cathode ray tube Color television cathode ray tube

1977-06-28

1979-04-24

Cooper, Jack

Electric lamp and discharge devices

Cathode ray tube

Screen

313468, 2523014R, 2523014S, 2523016S, C09K 1118, C09K 1146, H01J 2920

Patent

active

041514424

ABSTRACT:
A color television cathode ray tube which comprises a phosphor screen formed of (A) a red-emitting phosphor selected from the group consisting of europium-activated rare earth metal oxide and europium-activated rare earth metal oxysulfide; (B) a green-emitting phosphor selected from the group cosisting of a mixture of copper-activated zinc sulfide and gold-activated aluminum-coactivated zinc sulfide and copper- and gold-activated zinc sulfide; and (C) a blue-emitting phosphor of silver-activated zinc sulfide, and wherein the green-emitting phosphor contains 0.005 to 0.02% by weight of copper and 0.005 to 0.15% by weight of gold based on the total amount of the green-emitting phosphor; and current running through the cathodes of electron guns for exciting the red-, green- and blue-phosphors can be made to have a substantially equal amount for the respective electron guns.

REFERENCES:
patent: 2402757 (1946-06-01), Leverenz
patent: 2623858 (1952-12-01), Kroger
patent: 3423621 (1969-01-01), Royce
patent: 3922233 (1975-11-01), Torii et al.

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