Patent ID: 8038259

Claim:
An ink-jet recording apparatus comprising: a conveying unit configured to convey a recording medium; an ink jet head including an ink ejection surface having a plurality of nozzles formed thereon configured to eject ink to the recording medium conveyed by the conveying unit in a first direction; a storage unit configured to store a plurality of first resolutions with respect to the first direction of an image to be formed on the recording medium, a number of the first resolutions defined as n (n≧2); a resolution designation unit configured to designate one of the first resolutions stored in the storage unit; and a head control unit configured to control driving of the ink-jet head according to the designated first resolution, wherein the plurality of nozzles are arranged on the ink ejection surface in a matrix in the first direction and in a second direction orthogonal to the first direction, wherein the plurality of nozzles are grouped into a plurality of nozzle sets, each of the plurality of nozzle sets including nozzles arranged along the second direction, and wherein the plurality of nozzle sets are spaced from one another in the first direction by first distances, each of the first distances is an integral multiple of a distance that is obtained by multiplying a unit distance by 2 n-1 , the unit distance corresponding to a highest resolution among the first resolutions stored in the storage unit.