Electric lamp and discharge devices – Cathode ray tube – Plural beam generating or control
Patent
1978-02-15
1980-11-04
Demeo, Palmer C.
Electric lamp and discharge devices
Cathode ray tube
Plural beam generating or control
H01J 2950
Patent
active
042322464
ABSTRACT:
Improvements in an electron gun assembly for a color picture tube comprising three electron guns arranged in an in-line relation, each of said three electron guns having three grid electrodes which have respective cylindrical portions of the same inside diameter and are arranged spacedly from each other on the same axis, and the non-central two of which are kept at the same electric potential. At least one of the non-central two grid electrodes is not required to be provided with an inner electrode so that it consists only of cap electrodes, and height i.e. the axial length of the inside cylinders of the respective cap electrodes of the non-central electron guns and the central electron guns are selected to be individually less than the inside diameter (D) of the electrodes.
REFERENCES:
patent: 3294999 (1966-12-01), Van Hekken
patent: 3987328 (1976-10-01), Yoshida et al.
patent: 4028581 (1977-06-01), Stratton
Ando Kunio
Fukuzawa Kenichi
Sakurai Soichi
DeMeo Palmer C.
Hitachi , Ltd.
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