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

1988-07-18

1989-09-26

Wieder, Kenneth

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313 39, 313456, H01J 2902, H01J 2982

Patent

active

048703206

ABSTRACT:
The present invention provides an improved electron gun in a color picture tube. Such electron gun includes a beam-forming region comprising cathodes and at least two electrodes and a main focus lens formed by two electrodes. The cathodes and all of the electrodes are interconnected to a plurality of insulative support rods. The improvement comprises forming a first focus lens electrode, nearest the beam-forming region, of two separated portions that are electrically connected. The portion of the first focus lens electrode that is nearest the other focus lens electrode only is interconnected to the support rods near the main focus lens. The portion of the first focus lens electrode that is nearest the beam-forming region is connected to the support rods immediately adjacent to a beam-forming electrode.

REFERENCES:
patent: 4491764 (1985-01-01), D'Amato
patent: 4514661 (1985-04-01), Stone
patent: 4629933 (1986-12-01), Bijma et al.
patent: 4697120 (1987-09-01), Alig et al.

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