Patent ID: 6412903
Filing Date: 2002-07-02
Classification: B41J

Abstract:
A method of correcting a print error caused due to a misalignment between chips mounted on an array head of an inkjet printer comprising nozzles, the method comprisingcalculating an acceptable limit of a rotation angle of the chips with respect to reference positions, within a range that does not cause a white band to form on a printed image; determining whether the rotation angle of each chip is within the acceptable limit; correcting a machine error of each chip if it is determined that the rotation angle of each chip is not within the acceptable limit; if the rotation angle of each chip is within the acceptable limit, adding a plurality of nozzles on an end of each chip, determining which of the added nozzles to use based on a predetermined trial printing pattern, and correcting a print error in a horizontal direction that is caused due to a misalignment of the chips in the horizontal direction; and correcting a print error in a vertical direction that is caused due to a misalignment between the chips in the vertical direction by determining a reference time for a voltage pulse application to al heater disposed on one of the nozzles of the array head of the inkjet printer based on the trial printing pattern, by variably determining a voltage pulse application time, thereby adjusting a time interval for an ink ejection from respective chips.