INK JET RECORDING APPARATUS AND METHOD

摘要

The present invention relates to an ink jet recording apparatus and method. In an aspect of the present invention, uneven concentration correction and non-ejection correction are performed at the time of drawing an image. In the non-ejection correction, a non-ejecting nozzle and a deflected ejection nozzle are detected as a defective nozzle, the detected defective nozzle is not allowed to eject ink to perform the non-ejection correction. When a deflected ejection nozzle is detected, an allowable value range of a deflected ejection amount of each of nozzles with respect to a deflected ejection amount of each of nozzles at the time of creating an uneven concentration correction parameter is determined. A nozzle in which a deflected ejection amount exceeds the allowable value range so that the deflected ejection occurs is detected as a deflected ejection nozzle.

主权项

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.