Color display tube with channel electron multiplier means

Details Color display tube with channel electron multiplier means Color display tube with channel electron multiplier means

1986-10-23

1990-01-09

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Secondary emissive electrode

313105CM, H01J 2980, H01J 2946

Patent

active

048930539

ABSTRACT:
A color display tube which has a channel plate electron multiplier for multiplying a low voltage, low current electron beam and thereby obtaining an amplified output beam for producing an image on a screen formed of a plurality of different phosphors arranged as dots, each of which is surrounded by at least one ring. In order to form the output beam into well defined dots and rings to obtain good color purity, the source-to-screen distance of the output beam is varied in a predetermined manner. A means for doing this comprises additional electrodes mounted on the output side of the electron multiplier.

REFERENCES:
patent: 4023063 (1977-05-01), King et al.
patent: 4034254 (1977-07-01), King et al.
patent: 4511822 (1985-04-01), Washington et al.

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