Nozzle shading method, and an inkjet printing apparatus using same
AssigneeDainippon Screen Mfg. Co., Ltd.
InventorsSeiya NOMURA, Kazuki FUKUI, Hiroyuki FUCHIOKA, Kunio MURAJI
Life of this patent
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Abstract
An inkjet printing apparatus includes a plurality of nozzles for discharging ink, a CIS (Contact Image Sensor) type scanner for reading, as image data, charts for correction printed in the ink discharged from the nozzles, light emitters for emitting light to the charts for correction, a scanner controller for causing the scanner to scan the charts for correction with a plurality of read conditions, a correction table creator for creating nozzle shading correction tables based on the image data read, and a shading corrector for carrying out shading correction for the nozzles based on the correction tables.
Claims20
A nozzle shading method applicable to nozzles of an inkjet printing apparatus, comprising:
- a reading step for reading charts for shading correction with a CIS (Contact Image Sensor) type scanner with a plurality of read conditions, while emitting light from light emitters, thereby to obtain image data;
- a correction table creating step for creating nozzle shading correction tables based on the image data;
- and
- a shading correcting step for carrying out shading correction based on the correction tables.
An inkjet printing apparatus comprising:
- a plurality of nozzles for discharging ink;
- a CIS (Contact Image Sensor) type scanner for reading, as image data, charts for correction printed in the ink discharged from the nozzles;
- light emitters for emitting light to the charts for correction;
- a scanner controller for causing the scanner to scan the charts for correction with a plurality of read conditions;
- a correction table creator for creating nozzle shading correction tables based on the image data read;
- and
- a shading corrector for carrying out shading correction for the nozzles based on the correction tables.
Dependencies are inferred from the claim text.