Patent ID: 7023461

Claim:
A method for reducing cross-talk between pixel areas printed in a line on a thermographic material (m) by a thermal printing system comprising a thermal printer with a thermal head (TH) having a set of energisable heater elements (Hn), the energisable heater elements (Hn) being drivable with at least one activation pulse for supplying a controllable amount of heat to the heater elements to generate a graphical output level (Gn) of pixel areas on the thermographic material, wherein a plurality of subsets (Ns) of the heater elements are sequentially driving elements to print pixel areas in each line and wherein the crosstalk between pixel areas printed by heater elements in the same and/or different subsets is reduced by the steps of: calculating a value relating to heat supplied to an n th heater element from any one other heater element after activation thereof, in accordance with a predetermined relationship relating the effect of heat from any said one other heater element after activation thereof on the graphical output of all heater elements in a same and/or a different subset and driving the n th heater element in accordance with the calculated value.