Patent ID: 8998362
Filing Date: 2015-04-07
Classification: B41J

Abstract:
1. A liquid ejection apparatus, comprising: a head which has a plurality of ejection openings for ejecting liquid, the ejection openings being arranged at equal intervals relative to one direction, a conveyor which conveys a recording medium relatively to the head, in the conveyance direction intersecting the one direction; an image dot controller which controls the head based on image data so that the liquid is ejected from the ejection openings to form image dots structuring pixels of an image on the recording medium conveyed by the conveyor; a determiner which successively determines, for each of the ejection openings, whether an image dot non-forming period is equal to or longer than a predetermined time period, the image dot non-forming period being a period from a first time point where an image dot is formed to another time point where a subsequent image dot is formed under control by the image dot controller; and a non-image ejection data generator which generates non-image ejection data for non-image dot formation, a non-image dot controller which controls the head so that each of the ejection openings ejects, based on the non-image ejection data for the respective ejection opening, the liquid once within the non-image dot forming period in the image dot non-forming period for the respective ejection opening to form on the recording medium the non-image dot, which is not based on the image data, so that a plurality of the non-image dots structured by the liquid ejected from the ejection openings are scattered in the conveyance direction.