Electric lamp and discharge devices – Cathode ray tube – Plural beam generating or control
Patent
1999-03-31
2000-01-04
Patel, Vip
Electric lamp and discharge devices
Cathode ray tube
Plural beam generating or control
313412, 313426, 313427, H01J 2950
Patent
active
060113480
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.
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Hitachi , Ltd.
Patel Vip
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