Ink jet printing apparatus, calibration method and calibration chart printing method
AssigneeCanon Kabushiki Kaisha
InventorYuji Akiyama
Life of this patent
Estimating the term…
Abstract
In addition to the patches to be measured, a pattern of strips, one of which is formed by a combination of cyan and magenta and the other by a combination of yellow and black, is printed prior to the printing of the patches. The band patterns are printed by setting each of the component colors at the same gray scale value as the maximum value of the measurement patches for each color. Thus, in the printing of each band pattern, ink is ejected at two times the duty of the patch with the maximum gray scale value, thereby eliminating the viscous ink almost completely.
Claims26
An ink jet printing apparatus, which uses a printing head for ejecting ink, ejecting the ink to a printing medium so as to perform printing, said apparatus comprising:
- printing means that prints a chart for a calibration of said ink jet printing apparatus by causing the printing head to eject the ink to the printing medium,
- wherein the chart includes a patch to be measured by a measurement device and a pattern which is printed before said patch and is printed at an ejection duty equal to or higher than a maximum ejection duty in an ejection duty, at which said patch is printed.
An ink jet printing apparatus, which uses a printing head for ejecting ink, ejecting the ink to a printing medium so as to perform printing, said apparatus comprising:
- printing means that prints a chart for a calibration of said ink jet printing apparatus by causing the printing head to eject the ink to the printing medium,
- wherein the chart includes a patch to be measured by a measurement device and a pattern which is printed before said patch and is printed at a predetermined ejection duty and as the pattern of a predetermined size.
A calibration method for calibrating an ink jet printing apparatus, which uses a printing head for ejecting ink, ejecting the ink to a printing medium so as to perform printing, said method comprising the steps of:
- printing a chart for a calibration of said ink jet printing apparatus by causing the printing head to eject the ink to the printing medium;
- executing a measurement of the chart by using a measurement device;
- generating calibration data based on a result of the measurement;
- and
- changing predetermined data for printing, based on the generated calibration data,
- wherein the chart includes a patch to be measured by the measurement device and a pattern which is printed before said patch and is printed at an ejection duty equal to or higher than a maximum ejection duty in an ejection duty, at which said patch is printed.
A calibration method for calibrating an ink jet printing apparatus, which uses a printing head for ejecting ink, ejecting the ink to a printing medium so as to perform printing, said method comprising the steps of:
- printing a chart for a calibration of said ink jet printing apparatus by causing the printing head to eject the ink to the printing medium;
- executing a measurement of the chart by using a measurement device;
- generating calibration data based on a result of the measurement;
- and
- changing predetermined data for printing, based on the generated calibration data,
- wherein the chart includes a patch to be measured by the measurement device and a pattern which is printed before said patch and is printed at a predetermined ejection duty and as the pattern of a predetermined size.
A method of printing a chart used for a calibration to calibrate an ink jet printing apparatus, which uses a printing head for ejecting ink, ejecting the ink to a printing medium so as to perform printing, said method comprising the step of:
- printing the chart by causing the printing head to eject the ink to the printing medium,
- wherein the chart includes a patch to be measured by a measurement device and a pattern which is printed before said patch and is printed at an ejection duty equal to or higher than a maximum ejection duty in an ejection duty, at which said patch is printed.
A method of printing a chart used for a calibration to calibrate an ink jet printing apparatus, which uses a printing head for ejecting ink, ejecting the ink to a printing medium so as to perform printing, said method comprising the step of:
- printing the chart by causing the printing head to eject the ink to the printing medium,
- wherein the chart includes a patch to be measured by a measurement device and a pattern which is printed before said patch and is printed at a predetermined ejection duty and as the pattern of a predetermined size.
A program of processing for printing a chart used for a calibration to calibrate an ink jet printing apparatus, which uses a printing head for ejecting ink, ejecting the ink to a printing medium so as to perform printing, said processing comprising the step of:
- printing the chart by causing the printing head to eject the ink to the printing medium,
- wherein the chart includes a patch to be measured by a measurement device and a pattern which is printed before said patch and is printed at an ejection duty equal to or higher than a maximum ejection duty in an ejection duty, at which said patch is printed.
A program of processing for printing a chart used for a calibration for calibrating an ink jet printing apparatus, which uses a printing head for ejecting ink, ejecting the ink to a printing medium so as to perform printing, said processing comprising the step of:
- printing the chart by causing the printing head to eject the ink to the printing medium,
- wherein the chart includes a patch to be measured by a measurement device and a pattern which is printed before said patch and is printed at a predetermined ejection duty and as the pattern of a predetermined size.
A storage medium storing a program of processing, which is readable by a computer, for printing a chart used for a calibration to calibrate an ink jet printing apparatus, which uses a printing head for ejecting ink, ejecting the ink to a printing medium so as to perform printing, said processing comprising the step of:
- printing the chart by causing the printing head to eject the ink to the printing medium,
- wherein the chart includes a patch to be measured by a measurement device and a pattern which is printed before said patch and is printed at an ejection duty equal to or higher than a maximum ejection duty in an ejection duty, at which said patch is printed.
A storage medium storing a program of processing, which is readable by a computer, for printing a chart used for a calibration for calibrating an ink jet printing apparatus, which uses a printing head for ejecting ink, ejecting the ink to a printing medium so as to perform printing, said processing comprising the step of:
- printing the chart by causing the printing head to eject the ink to the printing medium,
- wherein the chart includes a patch to be measured by a measurement device and a pattern which is printed before said patch and is printed at a predetermined ejection duty and as the pattern of a predetermined size.
Dependencies are inferred from the claim text.