Deflection yoke for a color cathode ray tube

Details Deflection yoke for a color cathode ray tube Deflection yoke for a color cathode ray tube

1981-06-19

1984-02-21

Demeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

335211, H01F 312

Patent

active

044332688

ABSTRACT:
A deflection yoke for a color cathode ray tube is disclosed which does not cause raster distortion and avoids electron beam convergence error. Both horizontal and vertical deflection coils generate fields having a pincushion distribution. Front end magnetic members extend the pincushion type vertical deflection magnetic field toward the viewing screen of the tube. Rear end magnetic members deform one portion of the magnetic field generated by the vertical deflection coils into a barrel type so that the sum of the vertical deflection magnetic field is effectively a barrel type distribution.

REFERENCES:
patent: 4143345 (1979-03-01), Barkow
patent: 4217566 (1980-08-01), Hamano et al.
patent: 4231009 (1980-10-01), Barkow
patent: 4257023 (1981-03-01), Kamijo
"DPC-Free Color Picture Tube," by Taketoshi Shimona et al., Toshiba Review, vol. 34, No. 4, pp. 348-351, Apr., 1979.
"Development of a Full Pincushion Free Deflection Yoke for 110 Degree Color CRT" by Eiji Tamaki et al., of Toshiba Corp., Television Gatsukai Gijutsu Houkoku (Televigatsu-Gi-Ho, vol. 4, No. 13, pp. 1-6, published Aug. 28, 1980.

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