Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1985-05-22
1987-08-25
Blum, Theodore M.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
H01J 2956
Patent
active
046895264
ABSTRACT:
To achieve improved and, in particular, optimum deflection correction of television picture tubes the sawtooth signal from the horizontal or vertical oscillator which is conventionally subjected to a correction, is left uncorrected. Per line, the time relation of the digital video signal controlling the picture tube via digital-to-analog converters is changed with respect to the time relation of the video signals as reconditioned with the aid of a video processor, i.e., by the correcting value depending on the respective locus of an image spot on the screen. Accordingly, the deflection correction is not carried out by influencing deflection means, but by a corresponding correction of the time relation of the video signals with respect to their loci on the picture screen.
REFERENCES:
patent: 3893174 (1975-07-01), Sano et al.
patent: 4282546 (1981-08-01), Reitmeier
patent: 4354143 (1982-10-01), Judd
patent: 4401922 (1983-08-01), Kamata et al.
patent: 4549117 (1985-10-01), Takahashi et al.
patent: 4600945 (1986-07-01), Bolger
Blum Theodore M.
Deutsche ITT Industries GmbH
Peterson T. L.
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