Patent ID: 7222931

Claim:
A method of correcting a printing error in an inkjet printer having a printer head on which a 1 st through 2N th nozzles are provided, in which N is a positive integer greater than 0, and a feed roller, the method comprising: determining if a trailing end of a print paper has escaped from the feed roller which periodically moves the print paper a width of the printer head; if the trailing end of the print paper is determined to have escaped from the feed roller, moving the print paper half the width of the printer head width, and printing a reference line at a predetermined interval using a k th nozzle (1≦k≦N) from among the 1 st through N th nozzles; moving the print paper on which the reference line is printed half the width of the printer head, and printing comparison lines at a predetermined interval using the (N+1) th through 2N th nozzles; detecting an error distance between the reference line and one of the comparison lines printed by an I th nozzle (N+1≦I≦2N), the l th nozzle being disposed at a position corresponding to the k th nozzle among the (N+1)th through 2N th nozzles; and correcting a distance that the print paper is moved according to the detected error distance.