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US 8,136,903 B2Granted
Ink jet printing apparatus and ink jet printing method
AssigneeCanon Kabushiki Kaisha
InventorSyunichi Kunihiro
Life of this patent
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Abstract
In an ink jet printing apparatus including a plurality of nozzle arrays, if a print position displacement between the nozzle arrays is adjusted, it is possible to perform high-speed printing at the time of performing a printing operation using only a single nozzle array. Specially at the time of changing a printing state of using a first nozzle array and a second nozzle array into a printing state of using the first nozzle array only, a conveying amount of the printing medium is changed in accordance with the displacement of the printing medium.
Claims11
A printing apparatus comprising:
- a printing unit having a first nozzle array and a second nozzle array which respectively arrange a plurality of nozzles in a predetermined direction;
- a conveying unit for conveying a print medium in the predetermined direction;
- and
- a control unit for controlling said printing unit and said conveying unit to print an image on the print medium,
- wherein said control unit is configured to perform a first mode, where the first nozzle array is used for printing, and a second mode, where the first and second nozzle arrays are used for printing, and
- said control unit changes use nozzles in the first nozzle array in accordance with a relative print position displacement in the predetermined direction between the first and second nozzle arrays when performing the second mode, and changes a conveying amount of the print medium, where conveyance is performed between the first mode and the second mode, in accordance with the relative print position displacement.
3 more elements
A printing method comprising:
- a printing step of controlling a printing unit having a first nozzle array and a second nozzle array which respectively arrange a plurality of nozzles in a predetermined direction and a conveying unit for conveying a print medium in the predetermined direction to print an image on the print medium,
- wherein said printing step performs a first mode, where the first nozzle array is used for printing, and a second mode where the first and second nozzle arrays are used for printing, and
- said printing step changes use nozzles in the first nozzle array in accordance with a relative print position displacement in the predetermined direction between the first and second nozzle arrays when performing the second mode, and changes a conveying amount of the print medium, where conveyance is performed between the first mode and the second mode, in accordance with the relative print position displacement.
Dependencies are inferred from the claim text.