Patent ID: 7438373

Claim:
A liquid droplet ejection apparatus which forms an image on a recording medium in accordance with image data, comprising: a plurality of ejection ports which eject droplets, the ejected droplets being deposited on the recording medium to form the image; an ejection data generation device which generates ejection data for the plurality of ejection ports in accordance with the image data: an ejection interval calculation device which calculates an ejection interval of a first ejection port of the ejection ports; an ejection interval judgment device which judges whether or not the calculated ejection interval of the first ejection port exceeds an ejection defect period, the first ejection port suffering an ejection defect once the ejection interval of the first ejection port exceeds the ejection defect period; a first image effect level judgment device which judges whether or not a first image effect level exceeds a first tolerance level, when the calculated ejection interval of the first ejection port is judged to exceed the ejection defect period, the first image effect level indicating an effect of the ejection defect of the first ejection port on the image; and an ejection control device which controls the first ejection port not to suffer from the ejection defect, when the first image effect level is judged to exceed the first to tolerance level.