Deflection yoke integrated within a cathode ray tube

Details Deflection yoke integrated within a cathode ray tube Deflection yoke integrated within a cathode ray tube

1981-12-04

1984-01-31

Moore, David K.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Combined cathode ray tube and circuit element structure

313402, 313421, 313431, H01J 2316, H01J 2996

Patent

active

044292546

ABSTRACT:
An electron beam deflection yoke is located within the glass envelope of a cathode ray tube to increase deflection sensitivity and decrease deflection power consumption. The yoke comprises a plurality of elongated core members with pole pieces formed at one end. The horizontal and vertical deflection coils are wound on the elongated core members and are energized to produce deflection fields. Deflection field return flux in the core causes fields to be formed between the pole pieces. Magnetically permeable shielding means interact with the fields produced by the coils to shield the electron beam from the deflection fields outside the region occupied by the pole pieces, resulting in a shorter deflection region which allows wider beam deflection angles.

REFERENCES:
patent: 2143579 (1939-01-01), Ruska
patent: 2143580 (1939-01-01), Ruska
patent: 2206125 (1940-07-01), Ruska
patent: 2698399 (1954-12-01), Orr et al.
patent: 3328627 (1967-06-01), Firmin

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