Patent ID: 8317283

Claim:
An image forming apparatus comprising: a recording head which has a nozzle surface including a plurality of nozzles for ejecting an ink onto a recording medium; a movement device which causes relative movement between the recording head and the recording medium; an image forming controller which controls the recording head according to image data in such a manner that an image corresponding to the image data is formed on the recording medium; an ejection abnormality detection device which detects ejection abnormality including at least one of non-ejection and ejection direction deviation of the plurality of nozzles; a compensation device which compensates an image defect caused by the ejection abnormality; a determination device which determines whether or not the recording head is in a state where a compensation effect caused by the compensation device is not expected, according to detection result of the ejection abnormality detection device; and a display unit which shows a warning display when the determination device determines that the recording head is in a state where a compensation effect caused by the compensation device is not expected.