Patent ID: 6952242
Filing Date: 2005-10-04
Classification: H04N

Abstract:
1. A control signal for controlling a means for correction of at least one electron beam that scans a screen line by line, the control signal comprising: an amplitude of which varies along each screen line according to a first curve of a first type determined by a plurality of line parameters, each of the plurality of line parameters generated to vary from screen line to screen line according to a second curve of the first type determined by a plurality of column parameters, each of the first and second curves of the first type comprises the combination of: a constant level, determined by a first parameter, two half X a double-top curve with a continuous derivative formed by at least two humps placed end to end and located on either side of a center of the double-top curve, each hump having a null derivative at its top, and each minimum or maximum value of the double-top curve set by a respective parameter.