Color cathode ray tube having improved resolution

Details Color cathode ray tube having improved resolution Color cathode ray tube having improved resolution

1997-03-18

1999-04-27

Patel, Vip

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313412, 313426, 313427, H01J 2950

Patent

active

058982604

ABSTRACT:
A color cathode ray tube includes an electron gun for generating and focusing three in-line electron beams, a deflection device for deflecting the three electron beams in the horizontal and vertical directions, and a phosphor screen which luminesces when the electron beams impinge thereon. A pair of electrodes of a plurality of electrodes form a final main lens between single openings provided in opposing ends of the pair of electrodes, each of the single openings being common to the three in-line electron beams, and a size of an aperture for a center electron beam of the three in-line electron beams in at least one of the first grid electrode and the second grid electrode is smaller than that of an aperture for a side electron beam of the three in-line electron beams in the at least one of the first grid electrode and the second grid electrode.

REFERENCES:
patent: 4898556 (1990-02-01), Day
patent: 5013963 (1991-05-01), Ikegami et al.
patent: 5034653 (1991-07-01), Cho et al.
patent: 5635792 (1997-06-01), Jung et al.
patent: 5710479 (1998-01-01), Adriaanse et al.

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