Patent ID: 6543892
Filing Date: 2003-04-08
Classification: B41J

Abstract:
A printing apparatus for printing on a printing medium with a printhead while a user moves a housing on the printing medium, comprising:detecting means for detecting the moving velocity of said housing; supply means for supplying a driving signal for driving said printhead; storing means for storing a plurality of velocity thresholds; and adjusting means for comparing a detection result from said detecting means with the plurality of velocity thresholds, and adjusting the supply timing of the driving signal on the basis of the comparing result so as to adjust a printing position, wherein said detecting means detects a variation of acceleration of said housing from a point where said housing is located at least two columns before a discharging operation is to be effected by said printhead to a point where said housing is located one column before the discharging operation is to be effected, and determines a period of the driving signal to be supplied to said printhead, based on an approximated integral value including the variation of acceleration between precedent columns.