Patent ID: 7571976

Claim:
A method of forming a nozzle check pattern by relatively moving a recording medium with respect to a liquid droplet ejection head in which a nozzle row is formed and ejecting liquid droplets from the nozzle row onto the recording medium, the method comprising: forming a first pattern by assigning consecutive numbers in order to the nozzles in the nozzle row, dividing the nozzle row into a plurality of first nozzle groups, and ejecting predetermined dots onto the recording medium in order from the nozzle with the smallest number to the nozzle with the largest number in each of the first nozzle groups; and forming a second pattern by dividing the nozzle row into plural second nozzle groups whose number is larger than that of the first nozzle groups and ejecting predetermined dots onto the recording medium in order from the nozzle with the smallest number to the nozzle with the largest number in each of the second nozzle groups.