Patent ID: 9600750
Date: 2017-03-21
CPC Classifications: B41J,G06K

Claim:
1. A printing control device for a printing unit that forms a print image corresponding to print data by performing main scanning to move a nozzle line, in which a plurality of nozzles are arranged in a different direction from a main scanning direction, relative to a print substrate in the main scanning direction and by performing sub-scanning to move the print substrate relative to the nozzle line in a sub-scanning direction: wherein main scanning performed two times by interposing sub-scanning of a distance d longer than a pitch of nozzles of the nozzle line in the sub-scanning direction is referred to as first main scanning and second main scanning, a region in which a print image is formed at a time of the first main scanning is referred to as a first print region, and a region in which the print image is formed at a time of the second main scanning is referred to as a second print region, and wherein the printing control device comprises: a record density acquisition unit that acquires record density of the print image in a determination region including at least a part of the first print region based on the print data; and a sub-scanning control unit that changes an overlap between the first and second print regions in the sub-scanning direction by changing the distance d of the sub-scanning according to the acquired record density.