Patent ID: 8567891

Claim:
An inkjet recording apparatus comprising: at least four recording heads including a plurality of nozzle arrays in which a plurality of nozzles are arrayed in an arraying direction, each corresponding to a first color ink, a second color ink, a third color ink, and a fourth color ink and being arranged in an intersecting direction that is substantially perpendicular to the arraying direction, wherein the nozzle arrays in each of the four recording heads are arranged in the arraying direction such that predetermined number of nozzles arrayed in an end portion of one nozzle array and predetermined number of nozzles arrayed in an end portion of a nozzle array which is adjoined to the one nozzle array and shifted to the one nozzle array in the arraying direction form an overlapping portion which is able to eject ink to same position on a recording medium in the arraying direction, and a controlling unit configured to control ejection of ink from the recording head to the recording medium for forming an image on the recording medium based on data of image while the relative movement of the four recording heads and the recording medium in a moving direction that intersects to the arraying direction, wherein a number of colors represented by using the first color ink and the second color ink in representable colors that are representable based on the data by the inkjet recording apparatus is fewer than a number of colors represented by using the third color ink and the fourth color ink in the representable colors, and wherein a width with which the overlapping portion of the recording head for the first color ink and the overlapping portion of the recording head for the second color ink overlap in the arraying direction is larger than a width with which the overlapping portion of the recording head for the third color ink and the overlapping portion of the recording head for the fourth color ink overlap in the arraying direction.