Inkjet recording apparatus and image forming method utilizing local variation processing parameters
First Claim
1. An inkjet recording apparatus, comprising:
- a recording head which has a nozzle row composed of a plurality of nozzles for ejecting ink;
a storage device which stores local variation processing parameters determined according to a nozzle locality showing displacement from an ideal state of dot depositions due to defectiveness of the nozzles;
a digital halftoning processing device which converts inputted image data to dot data;
a local variation processing device which receives the dot data from the digital halftoning processing device and varies the dot data so as to compensate a nozzle locality by using the local variation processing parameters stored in the storage device; and
a control device which controls ink ejection of the plurality of nozzles of the recording head according to the dot data that has been varied by the local variation processing device.
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Abstract
An inkjet recording apparatus has a recording head which has a nozzle row composed of a plurality of nozzles for ejecting ink, a storage device which stores local variation processing parameters determined according to nozzle locality showing displacement from an ideal state of dot depositions due to defectiveness of the nozzles, a digital halftoning processing device which converts inputted image data to dot data, a local variation processing device which varies the dot data obtained by the digital halftoning processing device so as to compensate the nozzle locality by using the local variation processing parameters stored in the storage device, and a control device which controls ink ejection of the plurality of nozzles of the recording head according to the dot data generated through processing by the local variation processing device.
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Citations
12 Claims
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1. An inkjet recording apparatus, comprising:
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a recording head which has a nozzle row composed of a plurality of nozzles for ejecting ink; a storage device which stores local variation processing parameters determined according to a nozzle locality showing displacement from an ideal state of dot depositions due to defectiveness of the nozzles; a digital halftoning processing device which converts inputted image data to dot data; a local variation processing device which receives the dot data from the digital halftoning processing device and varies the dot data so as to compensate a nozzle locality by using the local variation processing parameters stored in the storage device; and a control device which controls ink ejection of the plurality of nozzles of the recording head according to the dot data that has been varied by the local variation processing device. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An image forming method of forming an image on a printing medium using a recording head having a nozzle row composed of a plurality of nozzles for ejecting ink, the method comprising:
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a locality determining step of determining nozzle locality showing displacement from an ideal state of dot depositions due to defectiveness of the nozzles; a calculating step of calculating local variation processing parameters for compensating the nozzle locality according to the nozzle locality determined in the locality determining step; a storing step of storing, in a storage device, the local variation processing parameters calculated in the calculating step; a digital halftoning processing step of converting inputted image data to dot data with a digital halftoning method; a local variation processing step of, after converting the inputted image data to dot data in the digital halftoning processing step, varying the dot data so as to compensate the nozzle locality by using the local variation processing parameters stored in the storage device; and a control step of controlling ink ejection of the plurality of nozzles of the recording head according to the dot data generated in the local variation processing step. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification