Color cathode ray tube system with reduced spot growth

Details Color cathode ray tube system with reduced spot growth Color cathode ray tube system with reduced spot growth

1990-01-16

1991-01-29

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

H01J 2970, H01J 2976

Patent

active

049889265

ABSTRACT:
A color cathode ray tube system comprising three coplanar electron guns and one deflection unit. A dynamically controlled element driving the outer electron beams away from each other is arranged at the input side of the deflection unit. The underconvergence induced thereby is compensated in that the deflection unit generates deflection fields which cause an overconvergence of the outer beams. This leads to a reduction of the spot growth upon deflection.

REFERENCES:
patent: 4642527 (1987-02-01), Takahashi et al.
patent: 4725763 (1988-02-01), Okuyama et al.
patent: 4864195 (1989-09-01), Masterton

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