Patent ID: 7264332

Claim:
An inkjet head comprising: a plurality of nozzles that eject ink, the nozzles arranged so that: (a) the nozzles are arranged in a first direction on an ink ejection surface to form a plurality of rows parallel to one another; and (b) when the nozzles are projected from a second direction, which is parallel to the ink ejection surface and perpendicular to the first direction, onto a virtual straight line extending in the first direction, projective dots of the nozzles are arranged at equally spaced intervals on the virtual straight line, wherein: each of adjacent projective dot pairs includes two projective dots adjacent to each other; a most-distant adjacent projective dot pair represents an adjacent projective dot pair having a longest distance between two rows, which two nozzles corresponding to two projective dots thereof belong to, among the adjacent projective dot pairs; and a spatial frequency, which is determined based on an appearance interval of the most-distant adjacent projective dot pair in the first direction, is lower than a spatial frequency corresponding to a peak value of a visual transfer function.