Color TV display system

Details Color TV display system Color TV display system

1980-05-14

1982-11-02

Hubler, Malcolm F.

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Electron or ion beam deflecting type

335214, H01F 300

Patent

active

043575862

ABSTRACT:
A self-converging deflection yoke having toroidally-wound vertical deflection coils incorporates a pair of magnetically permeable field formers mounted on either side of the yoke. The field formers shunt a portion of the external field flux to the vicinity of the electron gun assembly where they form a pincushion-shaped field which aids in vertical coma correction. In one embodiment, a yoke comprising planar-wound vertical coils incorporates both coma-correcting rear field formers and a pair of front crossarm assemblies for providing side-pincushion correction. The resultant yoke provides covergence of electron beams free of coma and side-pincushion distortion with reduced sensitivity to transverse motion. In another embodiment, similar results are obtained without the front crossarms by vertical deflection coil having a nonradial winding configuration.

REFERENCES:
patent: 2817782 (1957-12-01), Over et al.
patent: 3274418 (1966-09-01), Crumly
patent: 3495124 (1970-02-01), Thompson et al.
patent: 3505560 (1970-04-01), Marvin
patent: 4237437 (1980-12-01), Vink et al.
patent: 4246560 (1981-01-01), Shimizu et al.
"Deflection Yoke for Dynamic Raster Distortion Correction Free Color Picture Tube", Toshiba New Product Information, pp. 1-12.

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