Ejection control device, liquid ejecting device, liquid ejecting method, and recording medium and program used therewith

#1. Field of the Invention

#The present invention relates to a liquid ejecting device for delivering liquid droplets onto an object by ejecting the droplets, and an ejection control device for controlling the ejection. In addition, the present invention relates to a liquid ejecting method and program for realizing the liquid ejecting technology, and to a recording medium with the program recorded thereon.

#2. Description of the Related Art

#FIGS. 1A, 1B, and 1C are schematic illustrations of the relationship between an ejection pattern corresponding to a pixel grayscale and a pattern drawn by droplets from a nozzle corresponding to the ejection pattern;

#FIG. 2 is a schematic illustration of a positional relationship between a nozzle and a pixel region in the case of performing no deflective ejection;

#FIG. 3 is a schematic illustration of a positional relationship between nozzles and a pixel region in the case of performing deflective ejection (two directions);

#The above technique of Japanese Unexamined Patent Application Publication No. 2003-226017 has no problem when a droplet ejected from a nozzle is delivered to only one pixel region, as shown in FIG. 2.

#However, the above technique cannot be directly applied to a lateral direction (LD) ejection technology proposed by the present Assignee.

#In the LD ejection technology, ejection of an ejected droplet is electrically controlled to deflect. FIG. 3 shows that, by using a head controlled to eject droplets in three directions, the droplets are delivered to a pixel region in an overlapping manner. As shown in FIG. 3, the grayscale of a pixel is represented by the number of droplets which are separately ejected from a plurality of nozzles (two nozzles in this example). In the example shown in FIG. 3, there are two horizontal ejecting directions for droplet ejection.