Shadow mask type color cathode ray tube

Details Shadow mask type color cathode ray tube Shadow mask type color cathode ray tube

1988-03-03

1990-01-09

Yusko, Donald J.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313477R, H01J 2981

Patent

active

048930547

ABSTRACT:
A color cathode ray tube which comprises a face panel including a faceplate having a phosphor screen formed of a pattern of triads of phosphor dots on an inner surface of the faceplate, the phosphor screen, and a color selecting shadow mask having a pattern of apertures for the passage of electron beams therethrough and held flat under tension by the face panel so as to confront, and spaced a predetermined distance inwardly from, the phosphor screen. At least the inner surface of the faceplate is curved so that the pitch between each neighboring apertures in the shadow mask can, while satisfying a predetermined condition relative to the distance between the inner surface of the faceplate and the shadow mask, decrease progressively away from the center of the faceplate towards a peripheral region of the faceplate.

REFERENCES:
patent: 3686525 (1972-08-01), Naruse et al.
patent: 3721853 (1973-03-01), Naruse et al.
patent: 3904912 (1975-09-01), Duistermaat
patent: 4547696 (1985-10-01), Strauss
patent: 4570101 (1986-02-01), Campbell
SID 86 Digest, pp. 322-326.
Information Display, Oct. 1986, pp. 43-44.

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