Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1985-03-21
1986-09-09
Blum, Theodore M.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
H01J 2970, H01J 2976
Patent
active
046111514
ABSTRACT:
A television apparatus, for generating a deflection rate parabolic auxiliary deflection current that corrects convergence distortions, includes a deflection generator output stage coupled to a deflection winding. The deflection generator output stage generates a trace scanning current during a trace interval. The primary winding of a transformer is coupled in a current path of the trace current. A parabolic voltage developing capacitance is coupled across a first secondary winding of the transformer. The trace scanning current in the primary winding of the transformer causes a deflection rate parabolic voltage to develop across a second secondary winding of the transformer. The parabolic voltage across a second secondary winding of the transformer is used for generating the convergence distortion correction current.
REFERENCES:
patent: 4352124 (1982-09-01), Kline
patent: 4472662 (1984-09-01), Freed
A data sheet for Dynamic Focusing Transformer No. AT4043/67 published by Philips Corporation dated Apr. 1980.
A schematic entitled Schematics Deflection Board, cover page and pp. 12-14 of the accompanying text that are included in the operating manual VR-Series of Moniterm Corporation.
A service manual for CTC 132 Series made by RCA Corporation, entitled Projection Television Basic Service Data, dated 1984, cover page and pp. 44-46 and 54-57 enclosed.
An article entitled Projection Television: Correcting Distortions by Konrad Schiecke and published in IEEE Spectrum, dated Nov. 1981, pp. 40-45.
Hoover Alan A.
Lendaro Jeffery B.
Luz David W.
Blum Theodore M.
Henig Sammy S.
Laks Joseph J.
RCA Corporation
Whitacre Eugene M.
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