Patent ID: 9044984
Filing Date: 2015-06-02
Classification: B41J

Abstract:
1. An ink jet recording apparatus comprising: an ink jet head for ejecting ink droplets from a plurality of nozzles to draw an image on a medium; a deflected ejection amount detector for detecting a deflected ejection amount of each of the nozzles; an uneven concentration correction parameter creation part for creating an uneven concentration correction parameter required for uneven concentration correction by analyzing an image of a test chart drawn on the medium by the ink jet head; an uneven concentration correction part for performing uneven concentration correction on the basis of the uneven concentration correction parameter created by the uneven concentration correction parameter creation part; an allowable value range determination part for determining an allowable value range of a deflected ejection amount for each of the nozzles with respect to a deflected ejection amount of each of the nozzles when the test chart is drawn; a deflected ejection nozzle detector for detecting a nozzle in which a deflected ejection amount exceeds the allowable value range so that a deflected ejection occurs, as a deflected ejection nozzle; and a non-ejection correction part for performing non-ejection correction by not allowing the deflected ejection nozzle to eject ink.