Patent ID: 8714678
Filing Date: 2014-05-06
Classification: B41J,H04N

Abstract:
1. An inkjet printing device using a print head comprising a first color liquid nozzle array in which a plurality of nozzles capable of ejecting ink containing a color material are arranged and a second improvement liquid nozzle array in which a plurality of nozzles capable of ejecting an image quality improvement liquid containing no color material are arranged, the inkjet printing device printing an image on a print medium by repeating a print scan in which the print head is moved in a main scan direction with ejecting the ink from the print head and a conveying operation of conveying the print medium in a conveying direction crossing the main scan direction, the inkjet printing device comprising: first control means for, during a first print scan, allowing nozzles positioned on an upstream side of the first color liquid nozzle array in the conveying direction to eject the ink onto the print medium; second control means for, during the first print scan, allowing nozzles positioned on an upstream side of the second improvement liquid nozzle array in the conveying direction to eject the image quality improvement liquid into an area on the print medium in which the ink has already been ejected; and third control means for, during a second print scan after the first print scan, allowing nozzles positioned on a downstream side of the second improvement liquid nozzle array in the conveying direction to eject the image quality improvement liquid into the area on the print medium into which the ink has already been ejected.