Convergence apparatus

Details Convergence apparatus Convergence apparatus

1977-05-24

1979-02-20

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315 13C, H01J 2970, H01J 2976

Patent

active

041409485

ABSTRACT:
A convergence apparatus in a color CRT display scanning the display surface by a plurality of electron beams, comprising convergence coils for pole pieces which impart electromagnetic action to the electron beams and a transistor circuit for superposing both of the horizontal and vertical convergence correction currents to each of the convergence coils whereby the precise convergence correction is attained.

REFERENCES:
patent: 3735191 (1973-05-01), Peter
patent: 3935506 (1976-01-01), Brockmann

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