Color picture tube having an electron gun with reduced convergen

Details Color picture tube having an electron gun with reduced convergen Color picture tube having an electron gun with reduced convergen

1989-10-24

1991-04-23

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313414, H01J 2950, H01J 2951

Patent

active

050102710

ABSTRACT:
A color picture tube includes a screen and an improved inline gun for generating and directing three inline electron beams along separate paths toward the screen. The gun includes a plurality of cathodes and at least six electrodes longitudinally spaced from the cathodes. The improvement comprises the first, second and fourth electrodes from the cathodes being of materials having lower coefficients of thermal expansion than the coefficients of thermal expansion of the materials of the other electrodes.

REFERENCES:
patent: 4119884 (1978-10-01), Blumenberg et al.
patent: 4492894 (1985-01-01), Reule et al.
patent: 4546287 (1985-10-01), Collins et al.
patent: 4631442 (1986-12-01), Reule et al.
patent: 4697120 (1987-09-01), Alig et al.
patent: 4743796 (1988-05-01), Baudry et al.
patent: 4772826 (1988-09-01), Bloom et al.
patent: 4897575 (1990-01-01), Shimoma et al.
patent: 4940917 (1990-07-01), Stil

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