Patent ID: 7488128

Claim:
An image recording apparatus comprising: a conveying mechanism comprising a conveyance information generating section which generates conveyance information of a recording medium when the recording medium is mounted and conveyed in a conveying direction; at least one recording unit, which ejects monochromatic ink, and which comprises a recording head drive circuit and a plurality of recording heads each having a plurality of nozzles which are arranged along a perpendicular direction that is perpendicular to the conveying direction, the recording heads being disposed in one of: (i) a first disposition in which end portions of the recording heads that are adjacent to each other in the perpendicular direction are located on a straight line along the perpendicular direction, and (ii) a second disposition in which the end portions of the recording heads that are adjacent to each other in the perpendicular direction are spaced apart from each other by a predetermined distance in the conveying direction; a recording medium front end detecting section which detects a front end of the recording medium; a recording medium both-lateral ends detecting section which detects both lateral ends of the recording medium; and an integral control section which controls the conveying mechanism, and which controls the recording unit based on information from the conveyance information generating section, information from the recording medium front end detecting section, and information from the recording medium both-lateral ends detecting section, to record image data on the recording medium as an image; wherein the integral control section comprises: a variable processing section which is configured to select a nozzle to eject the ink from the plurality of nozzles of each of the recording heads in the recording unit based on the information from the recording medium both-lateral ends detecting section, and which is configured to control an ejection timing of each nozzle column formed by the plurality of nozzles; and a control section which receives the image data and controls the variable processing section based on the information from the conveyance information generating section with at least the information from the recording medium detecting section as trigger information; wherein the control section comprises: a parameter storage section for each of the recording heads of the recording unit, the parameter storage section storing information on the ejection timing of the nozzle column of each recording head; a plain memory which stores the image data; and a central processing unit which controls at least the parameter storage section and the plain memory; and wherein the information on the ejection timing on the nozzle column of each of the recording heads comprises an adjustment value based on the design of the image recording apparatus.