Electron gun apparatus with auxiliary electrodes for a color cat

Electric lamp and discharge devices – Cathode ray tube – Plural beam generating or control

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Details

313449, 315 15, H01J 2946, H01J 2956

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active

048251208

ABSTRACT:
In an electron gun apparatus for color cathode-ray tube, first and second focusing electrodes respectively for focusing electron beams emitted from three electron guns are disposed. Between the first and second focusing electrodes, a pair of third focusing electrodes for forming an axial-nonsymmetrical electron lens are also disposed. Mutually different dynamic voltages are supplied to the third focusing electrodes in accordance with the change in deflection angle of the electron beam. Owing to the above described structure, uniform resolution is obtained at both the central part and the peripheral part of the screen.

REFERENCES:
patent: 4712043 (1987-12-01), Takenaka et al.

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