Patent ID: 7472980

Claim:
A method for updating a printing parameter of a printer, the method comprising following steps: (a) a plurality of first nozzles of a row of an inkjet print head of a printer simultaneously printing ink onto a print medium when the inkjet print head of the printer is moving in a first horizontal direction; (b) after executing step (a), moving the print medium along a vertical direction a distance less than a center distance between two adjacent nozzles; (c) after executing step (b), a plurality of second nozzles of a row of the inkjet print head simultaneously printing ink onto the print medium when the inkjet print head is moving in a second horizontal direction opposite to the first horizontal direction, wherein the plurality of first nozzles are different from the plurality of second nozzles; and (d) updating the printing parameter of the printer according to a result of step (a) and step (c).