Color CRT having a self-converging deflection yoke

Details Color CRT having a self-converging deflection yoke Color CRT having a self-converging deflection yoke

1996-05-30

2000-02-29

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

313440, G09G 128

Patent

active

060313455

ABSTRACT:
In a color CRT having an in-line electron gun and a self-converging deflection yoke, a first quadrupole electro-magnetic coil is provided on the deflection yoke, and is wider at the screen side than at the neck side, and a second quadrupole electro-magnetic coil which is provided on the deflection yoke and which is wider at the neck side than at the screen side. The main lens of the in-line electron gun may have a cross section of a race-track shape. A deflection electrode provided for deflecting the side beams may be provided in the vicinity of the main lens of the in-line electron gun. A quadrupole electric-field lens may be additionally provided for correcting an astigma of the side beam, provided in the vicinity of the deflection electrode.

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A-159992 Enhanced Elliptical Aperture Lens Gun for Color Picture Tubes, S. Shirai et al, pp. 185-191.

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