Patent ID: 7513600
Filing Date: 2009-04-07
Classification: B41J

Abstract:
1. A liquid droplet discharge head, comprising: a plurality of nozzles which discharge liquid droplets onto a recording medium, wherein the nozzles are arranged two-dimensionally in a main scanning direction perpendicular to a conveyance direction in which the recording medium is conveyed relatively with respect to the liquid droplet discharge head, and a sub-scanning direction which coincides with the conveyance direction, comprising: at least a portion of dots formed by the droplets deposited on the recording medium from the nozzles overlap mutually in the main scanning direction; and a first nozzle and a second nozzle located in adjacent nozzle blocks which discharge droplets to form mutually adjacent dots in the main scanning direction on the recording medium, and a third nozzle which is adjacent to the first nozzle in the sub-scanning direction, wherein the positions of the first nozzle and the second nozzle are separated in the sub-scanning direction by at least a distance equal to a product of a distance between the first nozzle and the third nozzle in the sub-scanning direction and an integer that is at least two, and the positions of the first nozzle and the third nozzle are separated in the main scanning direction by at least a distance of diameter of the discharged liquid droplets.