Deflection-coil system for color picture tubes

Details Deflection-coil system for color picture tubes Deflection-coil system for color picture tubes

1979-09-12

1981-07-21

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315 13C, 335213, H01J 2970, H01J 2976

Patent

active

042800803

ABSTRACT:
The 45.degree./45.degree. four-pole field required to correct dynamic covergence errors in a color-picture tube have in the past been produced by four auxiliary coils wound around the core of the vertical deflection toroidal-coil. According to the present invention, each of the toroidal-coil halves of the vertical deflection toroidal-coil is subdivided into three coils with alternate ones of the resulting six coils being connected in series. This provides the desired 45.degree./45.degree. four-pole field and the vertical deflection field with a saving of winding wire and winding time.

REFERENCES:
patent: 3851215 (1974-11-01), Dekeijser et al.
patent: 4027219 (1977-05-01), Van Alphen et al.

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