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US 5,627,555 AGranted
Line flicker suppression by adaptive de-interlacing
AssigneeRCA Thomson Licensing Corporation
InventorWillem den Hollander
Life of this patent
Estimating the term…
Abstract
A television display system employing edge brightness flicker reduction by modulation of the vertical deflection signal has digital control words for modulation polarity (D) and magnitude (S). These digital words are coupled to an amplifier (900) and converted to a bipolar analog signal (Bp). The bipolar analog signal comprises values in a first and second range. Signals in the first range produce vertical deflection modulation in a first direction and signals in the second range produce vertical deflection modulation in the opposite direction.
Claims15
A video display comprising:
- a CRT having a scanning electron beam describing a raster;
- means (950) for supplementary deflection of said electron beam;
- means (200) coupled to a source of display video signals for detecting therein flicker causative signals and generating therefrom a shift signal (S) of magnitude related to an amplitude of said flicker causative signals and a direction signal (D) indicative of a direction required for flicker compensation;
- means (910) coupled to said shift signal and said direction signal for generating an analog signal (Up);
- and
- means (920) for coupling said analog signal to said supplementary deflection means (950) for deflection of said electron beam in said direction established by said direction signal (D) and by an amount related to said shift signal (S).
3 more elements
A video display comprising:
- a CRT having a scanning electron beam describing a raster;
- means for supplementary vertical deflection (950) of said electron beam;
- means (200) responsive to a video signal for generating therefrom a digital signal (M) for supplementary vertical deflection;
- means (910) coupled to said digital signal for generating an analog signal (Up) of one polarity only, having a first and second range of amplitude values, where said first range of values represents deflection of said electron beam in a first direction, and said second range of values represents deflection of said electron beam in an opposite direction;
- and
- means (920) responsive to said analog signal for driving said supplementary vertical deflection means (950) for deflection of said electron beam in said first or said second vertical direction responsive to said first or second range of amplitude values, respectively.
3 more elements
Dependencies are inferred from the claim text.