Patent ID: 7458658

Claim:
A printing method, comprising: providing a printing head having a plurality of nozzles arranged in a row in an arrangement direction, wherein the distance between any two neighboring nozzles is P; determining an angle θ that makes (P×cos θ)/YO and (P×sin θ)/XO both be closest to positive integers by calculating (P×cos θ)/YO and (P×sin θ)/XO at every an interval of a predetermined angle from an initial angle of θ, wherein the distance between the dots of a data to be printed in the first direction is X 0 , and the distance between the dots of the data to be printed in the second direction perpendicular to the first direction is Y 0 ; increasing the resolution of the data to be printed, such that a distance between the dots of the data to be printed with increased resolution in the first direction is X 1 , and a distance between the dots of the data to be printed with increased resolution in the second direction is Y 1 ; rotating the printing head, such that an angle exists between the arrangement direction and the second direction is the determined angle θ, P×sin θ is substantially an integral multiples of X 1 , and P×cos θ is substantially an integral multiples of Y 1 ; and printing with the rotated printing head.