Patent ID: 8322814
Filing Date: 2012-12-04
Classification: B41J

Abstract:
1. An inkjet recording apparatus, comprising: an inkjet head which includes a plurality of nozzles through which droplets of liquid are ejected and a plurality of pressure generating elements corresponding to the nozzles; a conveyance device which conveys a recording medium; a recording waveform signal generating device which generates a drive signal having a recording waveform which is applied to the pressure generating elements when recording a desired image on the recording medium by means of the inkjet head; an abnormal nozzle detective waveform signal generating device which generates a drive signal having an abnormal nozzle detective waveform including a waveform that is different from the recording waveform and applied to the pressure generating elements when performing ejection for abnormality detection to detect an abnormal nozzle among the nozzles in the inkjet head; a detective ejection control device which causes the ejection for abnormality detection to be performed from the nozzles by applying the drive signal having the abnormal nozzle detective waveform to the pressure generating elements, in a state where the inkjet head is disposed in a head position which enables deposition of the ejected droplets onto the recording medium; an abnormal nozzle detective device which identifies the abnormal nozzle showing an ejection abnormality from results of the ejection for abnormality detection; a correction control device which corrects image data in such a manner that ejection is stopped from the identified abnormal nozzle and the desired image is recorded by the nozzles other than the abnormal nozzle; and a recording ejection control device which performs image recording by controlling ejection from the nozzles other than the abnormal nozzle in accordance with the image data that has been corrected by the correction control device; wherein the abnormal nozzle detective waveform includes a waveform which increases a volume of the liquid swelling from the nozzles compared to the recording waveform.