Patent ID: 6155668
Filing Date: 2000-12-05
Classification: B41J,G06K

Abstract:
A printer that forms a plurality of raster lines with a head, each of the raster lines comprising an array of dots aligned in a raster-forming direction, which is one direction of a printing medium, and carries out a sub-scan that moves said printing medium in a sub-scanning direction, which is another direction crossing the raster-forming direction, thereby printing an image corresponding to input image data on said printing medium, said printer comprising:said head having a plurality of nozzles configured to create dots of an identical color and arranged in the sub-scanning direction at a fixed interval;a raster-forming unit that drives said head to form the plurality of raster lines;a first sub-scan unit that carries out the sub-scan with a first accuracy;a second sub-scan unit that carries out the sub-scan with a second accuracy, which is lower than the first accuracy, when said printing medium is located at a predetermined position;a first control unit that controls said first sub-scan unit and said raster-forming unit in a first area where said first sub-scan unit carries out the sub-scan to record the image; anda second control unit that controls said second sub-scan unit and said raster-forming unit in a second area where said second sub-scan unit carries out the sub-scan, to compensate for a decrease in accuracy of the sub-scan and form the raster lines.