Ink-jet printing apparatus and ink-jet printing method

An ink jet printing method of performing printing by ejecting ink onto a printing medium from a printing head while scanning the printing head relatively to the printing medium,

• wherein the printing head is provided, for at least two kinds of ink, with ejection opening rows, each including a plurality of ejection openings arranged in a direction different from a direction of the scanning, the ejection opening rows being arranged to be apart from each other in the scanning direction at a predetermined distance and including respective ejection openings overlapping each other in the scanning direction,
• wherein printing is performed in which the number of times of scanning is m (m is a positive integer), which is required for completing an image on a predetermined area by means of a first ejection opening row set for use out of the ejection opening rows for the at least two kinds of ink, and the number of times of scanning is n (n is a positive integer), which is required for completing an image on the predetermined area by means of a second ejection opening row set for use out of the ejection opening rows for the at least two kinds of ink, where at least one of m and n is 2 or more, and an amount at which the printing medium is moved for each time of the scanning in a direction different from the direction of the scanning is L (L is a positive integer),
• wherein the second ejection opening row is staggered, relative to the first ejection opening row, toward a feed side regarding moving of the printing medium at a distance (m+a)×L (a is a positive integer), which is measured as a distance between respective ejection openings located at a discharge side end regarding the moving of the printing medium.

An ink jet printing method of performing printing by ejecting ink onto a printing medium from a printing head while scanning the printing head relatively to the printing medium,

• wherein the printing head is provided, for at least two kinds of ink, with ejection opening rows, each including a plurality of ejection openings arranged in a direction different from a direction of the scanning, the ejection opening rows being arranged to be apart from each other in the scanning direction at a predetermined distance and including respective ejection openings overlapping each other in the scanning direction,
• wherein printing is performed in which the number of times of scanning is m (m is a positive integer), which is required for completing an image on a predetermined area by means of a first ejection opening row set for use out of the election opening rows for the at least two kinds of ink, and the number of times of scanning is n (n is a positive integer), which is required for completing an image on the predetermined area by means of a second ejection opening row set for use out of the ejection opening rows for the at least two kinds of ink, where at least one of m and n is 2 or more, and an amount at which the printing medium is moved for each time of the scanning in a direction different from the direction of the scanning is L (L is a positive integer),
• wherein the second ejection opening row is staggered, relative to the first ejection opening row toward a discharge side regarding moving of the printing medium at a distance which is larger than (m+a)×L (a is a positive integer) and is shorter than (m+a+1)×L, the distance being measured as a distance between respective ejection openings located at a feed side end regarding the moving of the printing medium.

An ink jet printing method of performing printing by ejecting ink onto a printing medium from a printing head while scanning the printing head relatively to the printing medium,

• wherein the printing head is provided, for at least two kinds of ink, with ejection opening rows, each including a plurality of ejection openings arranged in a direction different from a direction of the scanning, the ejection opening rows being arranged to be apart from each other in the scanning direction at a predetermined distance and including respective ejection openings overlapping each other in the scanning direction,
• wherein printing is performed in which the number of times of scanning is m (m is a positive integer), which is required for completing an image on a predetermined area by means of a first ejection opening row set for use out of the ejection opening rows for the at least two kinds of ink, and the number of times of scanning is n (n is a positive integer), which is required for completing an image on the predetermined area by means of a second ejection opening row set for use out of the ejection opening rows for the at least two kinds of ink, where at least one of m and n is 2 or more, and an amount at which the printing medium is moved for each time of the scanning in a direction different from the direction of the scanning is L (L is a positive integer),
• wherein the second ejection opening row is staggered, relative to the first ejection opening row toward a feed side regarding moving of the printing medium at a distance which is larger than (m+a)×L (a is a positive integer) and is shorter than (m+a+1)×L, the distance being measured as a distance between respective ejection openings located at a discharge side end regarding the moving of the printing medium.

An ink jet printing method of performing printing by using a printing head having a first ejection opening row including a plurality of ejection openings ejecting a first kind of ink and a second ejection opening row including a plurality of ejection openings ejecting a second kind of ink different from the first kind of ink, the first and second ejection opening rows being set by selecting ejection openings from respective ejection opening rows for first and second kinds of inks, which rows are arranged to be apart from each other in a direction of scanning the printing head at a predetermined distance and include respective ejection openings overlapping each other in the scanning direction, and by ejecting ink onto a printing medium from the printing head, said method comprising:

• controlling the printing for an area, which has a length corresponding to a divided length of an ejection opening arranged length of at least one of the first and second ejection opening rows, to be completed by scanning the at least one of the first and second ejection opening rows to the area a plurality of times, between successive two times of scanning the printing medium is moved at a distance of the divided length, and assigning different ejection opening to the area from each of the plurality of times of scanning,
• wherein printing of a first image is completed by using the first kind of ink ejected by the first ejection row, then printing of a second image adjacent to the first image completed is completed by using the second kind of ink ejected by the second ejection row, and the time of scanning in which printing is not performed on the area of the first image exists between the time of a last scanning for completing the first image and the time of a first scanning for printing the second image.

An ink jet printing apparatus for performing printing by ejecting ink onto a printing medium from a printing head while scanning the printing head relatively to the printing medium,

• wherein the printing head is provided, for at least two kinds of ink, with ejection opening rows, each including a plurality of ejection openings arranged in a direction different from a direction of the scanning, the ejection opening rows being arranged to be apart from each other in the scanning direction at a predetermined distance and including respective ejection openings overlapping each other in the scanning direction,
• wherein printing is performed in which the number of times of scanning is m (m is a positive integer), which is required for completing an image on a predetermined area by means of a first ejection opening row set for use out of the ejection opening rows for the at least two kinds of ink, and the number of times of scanning is n (n is a positive integer), which is required for completing an image on the predetermined area by means of a second ejection opening row set for use out of the ejection opening rows for the at least two kinds of ink, where at least one of m and n is 2 or more, and an amount at which the printing medium is moved for each time of the scanning in a direction different from the direction of the scanning is L (L is a positive integer),
• wherein the second ejection opening row is staggered, relative to the first ejection opening row toward a discharge side regarding moving of the printing medium at a distance (m+a)×L (a is a positive integer), which is measured as a distance between respective ejection openings located at a feed side end regarding the moving of the printing medium.

An ink jet printing apparatus for performing printing by ejecting ink onto a printing medium from a printing head while scanning the printing head relatively to the printing medium,

• wherein the printing head is provided, for at least two kinds of ink, with ejection opening rows, each including a plurality of ejection openings arranged in a direction different from a direction of the scanning, the ejection opening rows being arranged to be apart from each other in the scanning direction at a predetermined distance and including respective ejection openings overlapping each other in the scanning direction,
• wherein printing is performed in which the number of times of scanning is m (m is a positive integer), which is required for completing an image on a predetermined area by means of a first ejection opening row set for use out of the ejection opening rows for the at least two kinds of ink, and the number of times of scanning is n (n is a positive integer), which is required for completing an image on the predetermined area by means of a second ejection opening row set for use out of the ejection opening rows for the at least two kinds of ink, where at least one of m and n is 2 or more, and an amount at which the printing medium is moved for each time of the scanning in a direction different from the direction of the scanning is L (L is a positive integer),
• wherein the second ejection opening row is staggered, relative to the first ejection opening row toward a feed side regarding moving of the printing medium at a distance (m+a)×L (a is a positive integer), which is measured as a distance between respective ejection openings located at a discharge side end regarding the moving of the printing medium.

An ink jet printing apparatus for performing printing by ejecting ink onto a printing medium from a printing head while scanning the printing head relatively to the printing medium,

• wherein the printing head is provided, for at least two kinds of ink, with ejection opening rows, each including a plurality of ejection openings arranged in a direction different from a direction of the scanning, the ejection opening rows being arranged to be apart from each other in the scanning direction at a predetermined distance and including respective ejection openings overlapping each other in the scanning direction,
• wherein printing is performed in which the number of times of scanning is m (m is a positive integer), which is required for completing an image on a predetermined area by means of a first ejection opening row set for use out of the ejection opening rows for the at least two kinds of ink, and the number of times of scanning is n (n is a positive integer), which is required for completing an image on the predetermined area by means of a second ejection opening row set for use out of the ejection opening rows for the at least two kinds of ink, where at least one of m and n is 2 or more, and an amount at which the printing medium is moved for each time of the scanning in a direction different from the direction of the scanning is L (L is a positive integer),
• wherein the second ejection opening row is staggered, relative to the first ejection opening row toward a feed side regarding moving of the printing medium at a distance (m+a)×L (a is a positive integer), which is measured as a distance between respective ejection openings located at a discharge side end regarding the moving of the printing medium.

An ink jet printing apparatus for performing printing by ejecting ink onto a printing medium from a printing head while scanning the printing head relatively to the printing medium,

• wherein the printing head is provided, for at least two kinds of ink, with ejection opening rows, each including a plurality of ejection openings arranged in a direction different from a direction of the scanning, the ejection opening rows being arranged to be apart from each other in the scanning direction at a predetermined distance and including respective ejection openings overlapping each other in the scanning direction,
• wherein printing is performed in which the number of times of scanning is m (m is a positive integer), which is required for completing an image on a predetermined area by means of a first ejection opening row set for use out of the ejection opening rows for the at least two kinds of ink, and the number of times of scanning is n (n is a positive integer), which is required for completing an image on the predetermined area by means of a second ejection opening row set for use out of the ejection opening rows for the at least two kinds of ink, where at least one of m and n is 2 or more, and an amount at which the printing medium is moved for each time of the scanning in a direction different from the direction of the scanning is L (L is a positive integer),
• wherein the second ejection opening row is staggered, relative to the first ejection opening row toward a feed side regarding moving of the printing medium at a distance (m+a)×L (a is a positive integer), which is measured as a distance between respective ejection openings located at a discharge side end regarding the moving of the printing medium.

An ink jet printing method of performing printing by using a printing head having a first ejection opening row including a plurality of ejection openings ejecting a first kind of ink and a second ejection opening row including a plurality of ejection openings ejecting a second kind of ink different from the first kind of ink, the first and second ejection opening rows being set by selecting ejection openings from respective ejection opening rows for first and second kinds of inks, which rows are arranged to be apart from each other in a direction of scanning the printing head at a predetermined distance and include respective ejection openings overlapping each other in the scanning direction, and by ejecting ink onto a printing medium from the printing head, said method comprising:

• control means for controlling the printing for an area, which has a length corresponding to a divided length of an ejection opening arranged length of at least one of the first and second ejection opening rows, to be completed by scanning the at least one of the first and second ejection opening rows to the area a plurality of times, between successive two times of scanning the printing medium, is moved at a distance of the divided length, and assigning different ejection opening to the area from each of the plurality of times of scanning,
• wherein printing of a first image is completed by using the first kind of ink ejected by the first ejection row, then printing of a second image adjacent to the first image completed is completed by using the second kind of ink ejected by the second ejection row, and the time of scanning in which printing is not performed on the area of the first image exists between the time of a last scanning for completing the first image and the time of a first scanning for printing the second image.

An ink jet printing method of performing printing by ejecting ink from a printing head while scanning a printing medium with a printing head, which manges a first ejection opening row, in which a plurality of ejection openings for ejecting a first kind of ink are arranged in a predetermined direction, and a second ejection opening row, in which a plurality of ejection openings for ejecting a first kind of ink are arranged in a predetermined direction, to be apart from each other in a direction of the scanning at a predetermined distance, said method comprising:

• a first printing step, of scanning a predetermined area of the printing medium with the printing head plural times to complete printing of a first image on the predetermined area by means of the first ejection opening row, the first ejection opening row faces the predetermined area during each of the plural times of scanning,
• a second printing step, of printing a second image by means of the second ejection opening row, the second image being printed on the predetermined area adjacent to the first image;
• and
• a selecting step, of selecting respective ejection openings used for said first and said second printing steps so that scanning, in which printing is not performed exists between a last scanning for printing the first image in said first printing step and first scanning for printing the second image in said second printing step.

An ink jet printing method of performing printing by ejecting ink from a printing head while scanning a printing medium with a printing head, which ranges a first ejection opening row, in which a plurality of ejection openings for ejecting a first kind of ink arranged in a predetermined direction, and a second ejection opening row, in which a plurality of ejection openings for ejecting a first kind of ink are arranged in a predetermined direction, to be apart from each other in a direction of the scanning at a predetermined distance, said method comprising:

• a printing step, of performing printing on a predetermined area in which the number of times of scanning is in (m is a positive integer), which is required fur completing a first image on the predetermined ares by means of the first ejection opening row, and the number of times of scanning is n (n is a positive integer), which is required for completing an image on the predetermined area by means of a second ejection opening row, where at least one of in and n is 2 or more, and an amount at which the printing medium is moved for each time of the scanning in a direction perpendicular the direction of the scanning is L (L is a positive integer) and
• a selecting step, of selecting respective ejection openings used for said printing step from the tint and second ejection opening rows,
• wherein said selecting step includes selecting the respective ejection openings so that the second ejection opening row is parted from the first ejection opening row toward a discharge side regarding moving of the printing medium at a distance (m+a)×L (a is a positive integer), which is measured as a distance between respective ejection openings used for printing, which are located at a feed side end regarding the moving of the printing medium.

An ink jet printing method of performing printing by ejecting ink from a printing head while scanning a printing medium with a printing head, which arranges a first ejection opening row, in which a plurality of ejection openings for ejecting a first kind of ink are arranged in a predetermined direction, and a second ejection opening row, in which a plurality of ejection openings for ejecting a first kind of ink are arranged in a predetermined direction, to be apart from each other in a direction of the scanning at a predetermined distance, said method comprising:

• a printing step, of performing printing on a predetermined area in which the number of times of scanning is a (in is a positive integer), which is required for completing a first image on the predetermined area by means of the first ejection opening row, and the number of times of scanning is n (m is a positive integer). which is required for completing an image on the predetermined area by means of a second ejection opening row, where at least one of m and n is 2 or more, and an amount at which the printing medium is moved for each time of the scanning in a direction perpendicular to the direction of the scanning is L (L is a positive integer);
• and
• a selecting step, of selecting respective ejection openings used for said printing step from the first and second ejection opening rows,
• wherein said selecting step includes selecting the respective ejection openings so that the second ejection opening row is parted from the first ejection opening row toward a feed side regarding moving of the punting medium at a distance (m+a)×L (a is a positive integer), which is measured as a distance between respective ejection openings used for printing, which are located at a discharge side end regarding the moving of the printing medium.