Inkjet recording apparatus and inkjet recording method

An inkjet recording apparatus, comprising:

• a recording unit including a first nozzle array in which a plurality of nozzles is arranged in a first direction and a second nozzle array in which a plurality of nozzles is arranged in the first direction, where ink is supplied from a common liquid chamber to the first nozzle array and the second nozzle array, and the nozzles in the second array are arranged while being shifted from each of the nozzles in the first array in the first direction;
• a scanning unit configured to perform relative scanning with a recording medium in a second direction intersecting the first direction;
• and
• a control unit configured to acquire image data and configured to control ejection operation of the ink from the recording unit,
• wherein in a case where ink droplets are ejected from the first nozzle array, part of energy related to the ink ejection operation of the recording unit propagates via the common liquid chambers and vibrates ink supplied to a nozzle adjacent to a nozzle that performs the ink ejection operation in the first direction among the nozzles in the second nozzle array,
• wherein, in a predetermined one time of relative scanning, the control unit performs control such that a difference between a ratio of the ink ejected from one of the first nozzle array and the second nozzle array and a ratio of the ink ejected from an other becomes a first value, for edge areas of a barcode including a plurality of bars in each of which a length in the first direction is longer than a length in the second direction and the edge areas of the barcode include a plurality of pixels in the second direction, and
• wherein, in the predetermined one time of relative scanning, the control unit performs control such that the difference between the ratio of the ink ejected from the one of the first nozzle array and the second nozzle array and the ratio of the ink ejected from the other becomes a second value less than the first value, for non-edge areas of the barcode.

An inkjet recording method using a recording unit including a first nozzle array in which a plurality of nozzles is arranged in a first direction and a second nozzle array in which a plurality of nozzles is arranged in the first direction, where ink is supplied from a common liquid chamber to the first nozzle array and the second nozzle array, and the nozzle in the second array are arranged while being shifted from each of the nozzles in the first array in the first direction, and a scanning unit configured to perform relative scanning with a recording medium in a second direction intersecting the first direction, wherein in a case where ink droplets are ejected from the first nozzle array, part of energy related to the ink ejection operation of the recording unit propagates via the common liquid chamber and vibrates ink supplied to a nozzle adjacent to a nozzle that performs the ink ejection operation in the first direction among the nozzles in the second nozzle array, the inkjet recording method comprising:

• acquiring image data and controlling ink ejection operation of the recording unit,
• wherein, in recording for edge areas of a barcode including a plurality of bars in which a length in the first direction is longer than a length in the second direction, in a predetermined one time of relative scanning, one of the first nozzle array and the second nozzle array is used, and an other of the first nozzle array and the second nozzle array is not used, and the edges areas of the barcode include a plurality of pixels in the second direction.

An inkjet recording method comprising:

• acquiring image data and controlling ink ejection operation of a recording unit including a first nozzle array in which a plurality of nozzles is arranged in a first direction and a second nozzle array in which a plurality of nozzles is arranged in the first direction, where ink is supplied from a common liquid chamber to the first nozzle array and the second nozzle array, and the nozzle in the second array are arranged while being shifted from each of the nozzles in the first array in the first direction, and a scanning unit configured to perform relative scanning with a recording medium in a second direction intersecting the first direction, wherein in a case where ink droplets are ejected from the first nozzle array, part of energy related to the ink ejection operation of the recording unit propagates via the common liquid chamber and vibrates ink supplied to a nozzle adjacent to a nozzle that performs the ink ejection operation in the first direction among the nozzles in the second nozzle array,
• wherein, in recording for edge areas of a barcode including a plurality of bars in which a length in the first direction is longer than a length in the second direction, in a predetermined one time of relative scanning, a difference between a ratio of the ink ejected from one of the first nozzle array and the second nozzle array and a ratio of the ink ejected from an other of the first nozzle array and the second nozzle array is a first value, and
• wherein, in recording for non-edge areas of the barcode in the predetermined one time of relative scanning, the difference between the ratio of the ink ejected from the one of the first nozzle array and the second nozzle array and the ratio of the ink ejected from the other is a second value less than the first value and,
• wherein the edge areas of the barcode include a plurality of pixels in the second direction.