Index type color picture tube

Details Index type color picture tube Index type color picture tube

1985-07-01

1987-07-14

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Screen

313471, 2523014S, H01J 2920, C09K 1108

Patent

active

046805028

ABSTRACT:
An index type color picture tube having a stripe type fluorescent screen with strips of a zinc sulfide-based green color phosphor, a zinc sulfide-based blue color phosphor, a red color phosphor which is a mixture of a Y.sub.2 O.sub.2 S:Eu phosphor containing not more than 2 ppm of Tb and a Y.sub.2 O.sub.3 :Eu phosphor, or a Y.sub.2 O.sub.2 S:Eu phosphor containing 5 to 30 ppm of Tb, and a phosphor for index detection has a uniform current-brightness characteristic of tricolor phosphors, and a less variation in white color tone of the picture reproduced over a range of from low current to high current.

REFERENCES:
patent: 3989977 (1976-11-01), Ashizaki
patent: 4113648 (1978-09-01), Ferri et al.
patent: 4507585 (1985-03-01), Inoue et al.
J. Electrochem. Soc., vol. 123, No. 1, pp. 75-78 and vol. 125, No. 2, pp. 305-312; "Enhancement of Cathodoluminescence Efficiency of Rare Earth Activated Y.sub.2 O.sub.2 S by Tb.sup.3+ or Pr.sup.3+ " and Synthesis and Luminescence Properties of Europium Activated Yttrium Oxysulfide Phosphors".

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