Patent ID: 7819496
Filing Date: 2010-10-26
Classification: B41J

Abstract:
1. An inkjet recording apparatus comprising: a recording head that moves in a main scanning direction and ejects ink from a plurality of nozzles toward a recording medium to perform a main scan; a conveying mechanism that conveys the recording medium in a sub-scanning direction by a predetermined conveyance amount to perform a sub-scan, the sub-scanning direction being configured to be perpendicular to the main scanning direction; a control unit that controls the recording head and the conveying mechanism to repeat the main scan and the sub-scan alternately to eject the ink on the recording medium at a position upstream in the sub-scanning direction with an interval satisfying a required resolution from the ink ejected on the recording medium in a previous main scan, the control unit setting the predetermined conveyance amount to be greater than a theoretical conveyance amount set based on a number of the nozzles being used and the required resolution, wherein the theoretical conveyance amount is an integral multiple of an interval corresponding to the required resolution and a difference between the predetermined conveyance amount and the theoretical conveyance amount is smaller than the interval corresponding to the required resolution; and a determining unit that determines whether the required resolution is higher than a first resolution, wherein the control unit sets the predetermined conveyance amount greater than the theoretical conveyance amount only when it has been determined by the determining unit that the required resolution is higher than the first resolution; the recording head is constructed so as to be capable of recording at a resolution equal to or lower than a second resolution in the sub-scanning direction by the main scan; and the first resolution is set to a resolution equal to or more than twice the second resolution.