Dynamic electron beam convergence apparatus

Details Dynamic electron beam convergence apparatus Dynamic electron beam convergence apparatus

1974-04-10

1976-04-27

Tubbesing, T. H.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Plural ray-type tube

H01J 2951

Patent

active

039537609

ABSTRACT:
An apparatus for converging three electron beams accurately on the picture tube screen of a color television reproducing system. In this apparatus, a controlled pulse is produced from a deflection drive pulse which is supplied to the reproducing system as one of several synchronizing pulses separately from the color component signals, or is produced from a synchronizing pulse which is separated from the composite signal in the reproducing system. Desired tilt controlled parabola currents are produced from the sawtooth voltage which is generated from the controlled pulse the position of the leading edge and pulse width of which are preferably set for adjusting the phase of the convergence fields relative to that of the deflection field and to avoid causing a distortion of the resultant parabola currents at the end of the blanking period.

REFERENCES:
patent: 3273008 (1966-09-01), Galloway et al.
patent: 3602764 (1971-08-01), Poel
patent: 3767962 (1973-10-01), Arya
patent: 3784869 (1974-01-01), Takahashi
patent: 3821591 (1974-06-01), Lister

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