G - Physics – 09 – G
Patent
G - Physics
09
G
375/46
G09G 1/00 (2006.01) H04N 9/64 (2006.01)
Patent
CA 2039904
Visible Moiré interference is eliminated by alternately shifting the phase of the horizontal sync signal or video signals such that the phase of each video line, and hence the phase of the resulting Moiré interference associated with that video line, is also alternately shifted. The phase of the Moiré interferences are shifted such that persistence of vision in the human eye averages oppositely phased phosphor intensity variations occurring on alternating scan lines and/or vertical fields. When viewed by a user of the CRT, optical cancellation of the Moiré interference patterns results.
Élimination de l'interférence de moirage visible par le déphasage alternatif du signal de synchronisation horizontal ou des signaux vidéo. Ce prodédé consiste à déphaser alternativement chaque ligne vidéo et, par conséquent, l'interférence de moirage associée à chaque ligne vidéo. Les interférences de moirage sont déphasées de telle façon que la persistance rétinienne de l'oeil humain fait la moyenne des variations d'intensité des luminophores en opposition de phase qui se produisent sur les lignes de balayage alternantes et/ou les trames verticales. Pour celui qui regarde le tube cathodique, il se produit une annulation optique des motifs d'interférence de moirage.
Riches Mckenzie & Herbert Llp
Sun Microsystems Inc.
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