Printing device and printing method

摘要

A printing device that forms a background by a first ink and images on the background by a second ink includes a head having first and second nozzle lines that eject, respectively, the first and second inks. The inks are ejected as the head moves, with respect to a medium, in a main scanning direction intersecting the first and second nozzle lines. A transport section transports the medium in a sub-scanning direction along the first and second nozzle lines. In an ejecting operation, the first and second inks are ejected in the relative movement in the main scanning direction and the relative transportation in the sub-scanning direction is performed. In the sub-scanning direction, first and second nozzle line used areas are set where the first and second inks, respectively, are ejected from the first and second nozzle lines. A nozzle unused area is defined therebetween.

主权项

1. A printing device which forms a first image using a first ink and forms a second image on the first image using a second ink, comprising:
first nozzles that are capable of ejecting the first ink; second nozzles that are capable of ejecting the second ink; and a controller that performs an image forming operation that moves the first nozzles and the second nozzles in an inward path or outward path of a main scanning direction, and on a medium forms a first dot of the first ink and a second dot of the second ink; wherein the controller performs the image forming operation to control moving the first nozzles and the second nozzles in the main scanning direction without forming either of the first dot by a part of the first nozzles or the second dot by a part of the second nozzles due to the presence of one or more unused nozzles that do not eject ink, such moving occurring during a period extending from a time after the first dot is formed using the first ink on the medium to a time before the second dot is formed on at least a portion of the first dot; and wherein in one image forming operation, a number of used first nozzles that eject the first ink differs from a number of used second nozzles that eject the second ink.