Electric lamp and discharge devices: systems – Cathode ray tube circuits – Plural ray-type tube
Patent
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
Matsuura Toshiro
Takeda Minoru
Matsushita Electric - Industrial Co., Ltd.
Montone G. E.
Tubbesing T. H.
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