Printing apparatus and printing method

Abstract

The invention provides a printing apparatus and a printing method that can sufficiently suppress the occurrence of variations in density due to the shifting of landing positions. A printing apparatus includes a carriage unit, and carries out printing on a recording medium while transporting the recording medium. The carriage unit includes a first head that discharges an ink and a second head that discharges an ink of the same color, and the second head is disposed so as to be adjacent to the first head in an x axis direction, and to overlap with the first head in a y axis direction. In an outgoing path in the reciprocation of the carriage unit, a printing density of a first image, which the first head prints, gradually decreases toward a downstream side in a transport direction of the recording medium, and the first image includes a dot group, in which at least two dots formed using the ink from the first nozzles are linked to one another in the x axis direction. In addition, in a return path in the reciprocation of the carriage unit, the second nozzles print a second image, which supplements a decrease in the printing density of the first image.

Description

technical field [0001] The present invention relates to a printing device and a printing method. Background technique [0002] There is known a printing device that performs printing on a flexible sheet-like recording medium by an inkjet method. Such printing devices generally include a plurality of print heads that eject ink onto a recording medium. These print heads are arranged so that adjacent print heads partially overlap in the array direction. [0003] In an overlapping area (overlapping area) between the print heads, ink is ejected from two adjacent print heads to complete an image. [0004] However, in the overlapping area of ​​such printing devices, there is a problem of density unevenness due to variations in landing positions. [0005] In order to solve such a problem, an attempt has been made to place, among adjacent print heads, printing pixels overlapping with those of a print head that ejects ink first, within the print pixels of a print head that ejects i...

AI Technical Summary

Problems solved by technology

[0006] However, in the above-mentioned method, it is impossible to sufficiently suppress the density unevenness due to the deviation of the landing position, especially it is difficult to suppress the density unevenness in the transport direction of the recording medium.

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