Color cathode ray tube having beam passageways with barrel-like

Details Color cathode ray tube having beam passageways with barrel-like Color cathode ray tube having beam passageways with barrel-like

1997-01-02

1999-08-03

Patel, Vip

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313414, H01J 2950

Patent

active

059329580

ABSTRACT:
A main lens portion in a three beam in-line type color cathode ray tube includes spaced-apart tube-like electrodes having elongated openings at facing ends thereof, and plate electrodes disposed therein. At least one of electron beam apertures in the two plate electrodes is a barrel-like aperture. The barrel-like aperture is defined by two arcs extending in the direction perpendicular to the inline direction and two straight lines extending in the inline direction. The apertures for the side electron beams in the plate electrode can be replaced with cutouts therein. Each of the cutouts is defined by two straight lines extending in the inline direction and an arc convexly curved toward the tube axis and extending in the direction perpendicular to the inline direction.

REFERENCES:
patent: 5146133 (1992-09-01), Shirai et al.
patent: 5461278 (1995-10-01), Misono et al.
patent: 5517078 (1996-05-01), Sugawara et al.
patent: 5592046 (1997-01-01), Kim
patent: 5659225 (1997-08-01), Tsuruoka et al.

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