Patent ID: 9108446
Filing Date: 2015-08-18
Classification: B41J

Abstract:
1. An ink jet printing apparatus comprising: a print head including a nozzle array formed by a plurality of nozzles that are for ejecting ink and that are arranged in a predetermined direction for forming an image on a print medium; a scanning unit configured to scan the print head in a forward direction and a backward direction crossing said predetermined direction; a conveying unit for conveying the print medium forward and backward in the predetermined direction; a generation unit configured to generate print data used for printing by the print head in such a manner that print duty of the print head for performing said scanning in the forward direction is higher than print duty of the print head for performing said scanning in the backward direction; and a control unit configured to control the print head, the scanning unit, and the conveying unit, wherein, after printing on one image area of the print medium by the print head scanned in the forward direction by the scanning unit, the control unit controls the conveying unit to convey the print medium forward for printing on another image area of the print medium adjacent to said one image area in the predetermined direction, and the control unit controls the print head and the scanning unit such that the print head being scanned in the forward direction by the scanning unit prints an image on the another image area, and wherein, after the print head prints the image on the another image area, the control unit controls the conveying unit to convey the print medium backward for printing on an area straddling said one image area and the another image area, and the control unit controls the print head and the scanning unit such that the print head being scanned in the backward direction by the scanning unit prints an image on said area straddling said one image area and the another image area.