摘要:
The present invention provides an inkjet printing apparatus and an inkjet printing method for printing a high-definition image while improving glossiness of the image surface without causing complication and enlargement of the apparatus. A plurality of inks are ejected from first and second printing heads so that a weighted average of a printing rate for each scan regarding an ink having the highest lightness becomes the largest among the plurality of inks and so that a maximum value regarding the printing rate of the ink having the highest lightness becomes larger than those of other inks.
摘要:
The present invention provides an ink jet printing system and method which allows high-quality images to be printed while improving the gloss of an image surface, as well as a relevant storage medium. According to the present invention, an image is printed using a print head including multiple nozzle arrays provided for ink in respective multiple colors and in each of which multiple nozzles configured to eject ink are arranged; the print head ejects the ink in the multiple colors onto the same print area on a print medium during multiple scans. The multiple types of ink are ejected from the print head so that the connectivity of ink dots formed on the front outermost surface of a print area is higher than that of other ink dots formed in the print area.
摘要:
An image data signal value conversion is performed such that the volume of ink applied to image areas on a print medium to be printed by the overlapping portions of the printing element substrates is smaller than that applied to image areas on the print medium to be printed by portions other than the overlapping portions. Alternatively, the image data signal value conversion is performed such that the volume of ink applied to overlapping areas on the print medium to be printed by two consecutive printing main scans is smaller than that applied to areas other than the overlapping areas. For this reason, even when forming photographic images by using an elongate “joining head”, high-quality images with no density unevenness between overlapping areas and other areas on a print medium can be produced. Also in a serial type printing apparatus, uniform images with no seam stripes can be produced.
摘要:
An inkjet printing apparatus and an inkjet printing method capable of suppressing generation of bronze phenomenon regardless of the color gamut is provided. For this purpose, in multipass printing, there are set more pixels permitted to print by at least one type of achromatic color ink than pixels permitted to print by chromatic color ink in the last print scan to a unit region. Accordingly, it becomes possible to apply achromatic color ink having a high bronze phenomenon reduction effect on the topmost layer of the print medium, and thereby generation of bronze phenomenon can be suppressed without any hue shift.
摘要:
When a feeding amount for multi-pass printing is changed, the purpose related to an image quality using a binary data generation pattern can still be attained by, for example, a density pattern method. Specifically, a multi-pass printing mode is identified, and a density pattern selection matrix associated with a cycle of binary data generation is selected in accordance with the selected printing mode. That is, a density pattern selection matrix employed for binary data generation using a density pattern is changed to a size corresponding to the feeding amount designated by the selected printing mode. Thereby, a phenomenon that a unit used for image processing to gain a predetermined purpose related to an image quality does not match a unit area used for a printing operation is avoided, and an image printing purpose using a binary data generation pattern can be appropriately attained.
摘要:
A printing apparatus that includes nozzle arrays, formed of nozzles for ejecting ink of the first to fourth ink color groups, and that scans a print medium while moving the nozzle arrays to perform printing. For printing a unit area of a print medium, where printing is to be completed by performing a plurality of scans, the printing apparatus performs a plurality of scans, and conveys, between movements, a print medium a predetermined amount, which is equivalent to the width of the unit area. Then, to perform a plurality of scans using the nozzle arrays for the first to fourth ink color groups, print data are generated, so that for the nozzle arrays that belong to two ink color groups, the nozzle array for the first ink color group is employed to eject ink into the unit area prior to the nozzle array for the second ink color group.
摘要:
An ink jet printing apparatus and an ink jet printing method can enable high quality printing, without causing uneven thickness in a conveying direction, using a printing head having a plurality of ejection port arrays. To this end, the printing is performed by making distribution ratios of printing in each ejection port array in the printing head different from one another according to gradation.
摘要:
In a printing apparatus and method, both high-speed and high-quality formation of images can be achieved. The apparatus has a full-line printhead that includes printhead chips. A plurality of printing element arrays are disposed in parallel on the same printhead chip, and a distribution ratio of print data is controlled so as to at least differ in an overlap area in which end portions of the printing element arrays overlap each other.
摘要:
In both a full-line and a serial printer, the amount of ink passing through nozzles of print heads is sometimes decreased below a normal value before and during actual printing. In the printer of the present invention, a preliminary ejecting operation is performed taking the opportunity in which the amount of ink passing through nozzles is decreased below a normal value. Then, the amount of ink passing through nozzles recovers to the normal value in ink ejection after the preliminary ejecting operation. Since only a small amount of ink is ejected through the nozzles during the preliminary ejection operation, dots formed on a print sheet are not noticeable. Further, it is unnecessary to move the print heads to a home position where an ejection recovering process is executed to remove ink having an increased viscosity.
摘要:
An ink jet printing apparatus and an ink jet printing method which enable a high quality printing without causing uneven thickness in a conveying direction using a printing head having a plurality of ejection port arrays are provided. To this end, the printing is performed by making distribution ratios of printing in each ejection port array in the printing head different from one another according to gradation.