Color cathode ray tube including a channel plate electron multip

Details Color cathode ray tube including a channel plate electron multip Color cathode ray tube including a channel plate electron multip

1986-01-24

1988-01-26

Blum, Theodore M.

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

315366, 313103CM, 313105CM, H01J 2970, H01J 2972

Patent

active

047218800

ABSTRACT:
A channel plate electron multiplier is mounted parallel to, but spaced from, the screen. The electron multiplier comprises a stack of juxtaposed substantially planar apertured dynodes with the apertures therein aligned to form channels. An apertured extractor electrode is mounted on the output side of the electron multiplier. Preferably two or more foraminous deflector electrodes are mounted on the extractor electrode. The apertures in the foraminous deflector electrodes have the same pitch as the channels of the electron multiplier but are offset laterally relative to each other and to the axes of the channels by amounts which allow the emergent electron beam from each channel to pass through to the screen without impinging upon the deflector electrodes. By applying a potential difference between the deflector electrodes an electron beam emerging from its respective channel is deflected laterally onto a respective one of its associated group of phosphor stripes. The apertures in the deflector electrodes may be circular, elliptical or polygonal for example square, rectangular or hexagonal.

REFERENCES:
patent: 4560898 (1985-12-01), Knapp et al.

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