CRT display

Details CRT display CRT display

1992-06-08

1996-12-03

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

H01J 2951

Patent

active

055811620

ABSTRACT:
A CRT display for producing picture images on a cathode ray tube comprising a bipolar electromagnet located at a neck portion of a cathode ray tube and having field coils to produce a bipolar magnetic field for imparting a corrective horizontal or vertical deflection to an electron beam being deflected by the deflection yoke, upon receiving, from a current supply circuit, a sawtooth current with positive and negative alternations in synchronism with the deflection current of the cathode ray tube. The bipolar electromagnet is adopted to produce a bipolar magnetic field on the basis of an alternating sawtooth current which is supplied to its field coils in synchronism with the deflection current.

REFERENCES:
patent: 3398320 (1968-08-01), Hursh
patent: 3631296 (1971-12-01), Collie, Jr.
patent: 3930185 (1975-12-01), Barkow et al.
patent: 5086259 (1992-02-01), Sakurai et al.

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