Electron gun structure for a color picture tube apparatus

Details Electron gun structure for a color picture tube apparatus Electron gun structure for a color picture tube apparatus

1988-07-25

1990-01-30

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Plural concentrating, accelerating, and/or de-accelerating...

313412, 313414, H01J 2946, H01J 2956

Patent

active

048975753

ABSTRACT:
A color picture tube apparatus comprises an envelope including a funnel, a face plate and a neck, a phosphor screen on an inner surface of the face plate, an electron gun structure in the neck of the envelope for generating at least one electron beam, resistor means for supplying predetermined voltage to the electron gun structure, and deflection means for generating non-uniform deflection magnetic field to deflect the electron beam. The electron gun structure includes a focusing electrode including first means for generating an asymmetric converging electric field near the focusing electrode having a relative strong converging action in one direction compared with the converging action in another direction perpendicular to the one direction, an accelerating electrode including second means for generating an asymmetric diverging electric field near the accelerating electrode having a relative strong diverging action in the one direction compared with the diverging action in the other direction, and at least one intermediate electrode between the focusing electrode and the accelerating electrode for separating the converging electric field from the diverging electric field.

REFERENCES:
patent: 4443736 (1984-04-01), Chen
patent: 4701677 (1987-10-01), Ashizaki et al.
patent: 4710671 (1987-12-01), Sluyterman
patent: 4712043 (1987-12-01), Takenaka et al.
patent: 4728858 (1988-03-01), Koshigoe et al.

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