Cathode ray tube with deflection aberration correcting electrode

Details Cathode ray tube with deflection aberration correcting electrode Cathode ray tube with deflection aberration correcting electrode

1996-09-10

1999-05-18

O'Shea, Sandra

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313414, H01J29/51

Patent

active

059053313

ABSTRACT:
A color cathode ray tube includes an electron gun including electrodes (5, 6) forming a main lens (38) for shaping three in line electron beams, and a shield cup arranged neighboring the electrodes (5, 6) forming the main lens to protect the shaped electron beams from an external environment along a tubular axis, the electrodes (5, 6) forming the main lens (38), and the shield cup arranged in order along the tubular axis; wherein a deflection aberration correcting electrode (39) is provided in a bottom portion of the shield cup, the deflection aberration correcting electrode (39) changing the focusing or diverging action of the electron beams to change the diameter of the beams depending upon the amount of deflection of the electron beams.

REFERENCES:
patent: 4086513 (1978-04-01), Evans, Jr.
patent: 5113112 (1992-05-01), Shimoma et al.
patent: 5461278 (1995-10-01), Misono et al.

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