Plate-type cathode ray tube device

Details Plate-type cathode ray tube device Plate-type cathode ray tube device

1988-02-03

1990-06-12

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

313422, 313494, 313496, 313497, 340781, 34082579, G09G 310, G09G 330, H01J 2970, H01J 162

Patent

active

049336045

ABSTRACT:
A plate-type cathode ray tube device is disclosed in which a plurality of electron beams are emitted in directions parallel to a fluorescent screen, each of the electron beams is so deflected as to be perpendicular to the fluorescent screen, and performs a scanning operation in a direction parallel to the initial direction of the electron beam, a deflection voltage for deflecting each electron beam and for causing each electron beam to perform the above scanning operation is applied to one of a plurality of deflection plates which is juxtaposed in a direction parallel to the initial direction of the electron beam and each of which extends in a direction perpendicular to the initial direction of the electron beam, in such a manner that the deflection plates are successively applied with the deflection voltage, and a focusing correction voltage for keeping the size of electron beam spot formed on the fluorescent screen constant all over the fluorescent screen is applied to one of the deflection plates at the same time the deflection voltage is applied to a different one of the deflection plates.

REFERENCES:
patent: 4622492 (1986-11-01), Barten
patent: 4694225 (1987-09-01), Tomii et al.

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