Field harmonic enhancer in a deflection yoke

Details Field harmonic enhancer in a deflection yoke Field harmonic enhancer in a deflection yoke

1991-11-27

1994-04-26

Yusko, Donald J.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313431, 313426, 313440, 335210, 335213, 335284, 335296, H01J 2976, H01F 700

Patent

active

053069820

ABSTRACT:
In a deflection yoke mounted on a cathode ray tube, a pair of silicon steel field harmonic enhancers are placed over rear portions of a horizontal deflection coil of a saddle coil type near an electron beam entrance region of the coils such that portions of the saddle coils are interposed between the field harmonic enhancers and a neck portion of the cathode ray tube. The field harmonic enhancers reduce horizontal coma error by making the horizontal deflection field in the rear portion of the saddle coils more pincushion shaped.

REFERENCES:
patent: 4386331 (1983-05-01), Kohzuki et al.
patent: 4524340 (1985-06-01), Sluyterman
patent: 4853588 (1989-08-01), Ohtsu et al.
patent: 5117151 (1992-05-01), Sluyterman et al.
patent: 5121028 (1992-06-01), Milili
patent: 5138290 (1992-08-01), Togane et al.
patent: 5204649 (1993-04-01), Togane et al.
Article by Heinjnemans et al., published by Philips Tech. Rev. 39, No. 6/7, The Deflection Coils Of The 30 AX Colour-Picture System (undated).

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