Display tube including a convergence correction device

Details Display tube including a convergence correction device Display tube including a convergence correction device

1994-11-18

1995-07-25

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

31536828, 335213, H01J 2951

Patent

active

054365368

ABSTRACT:
Display tube including a convergence correction device which comprises a plurality of correction coils having coplanar axes and being arranged around the tube neck. The coils are of the planar type. More specifically, there are two sets of four coils for generating two differently oriented four-pole fields and two sets of six coils for generating two differently oriented six-pole fields, while all these coils are arranged on one flexible support which is wound around the tube neck a number of times, for example, one set of coils for each turn.

REFERENCES:
patent: 3368095 (1968-02-01), Jannery
patent: 3466580 (1969-09-01), Bull
patent: 3702450 (1972-11-01), Avery et al.
patent: 3754322 (1973-08-01), Chandler
patent: 4027219 (1977-05-01), Van Alphen et al.
patent: 4642527 (1987-02-01), Takahashi et al.
patent: 4961021 (1990-10-01), Oguro et al.

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