Patent application number | Description | Published |
20090015611 | INK JET PRINTING SYSTEM AND INK JET PRINTING METHOD - 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 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 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. | 01-15-2009 |
20090040550 | DATA GENERATION APPARATUS, PRINTING APPARATUS AND DATA GENERATION METHOD - 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. | 02-12-2009 |
20090219340 | INK JET PRINTING APPARATUS AND INK JET PRINTING METHOD - An ink jet printing apparatus and an ink jet printing method are provided which use a printing head having a plurality of ejection opening arrays and enable high quality printing without causing uneven density in a conveying direction. For this purpose, by providing a plurality of ejection opening arrays to chips constituting the printing head and changing data assigning ratio of each ejection opening array, deviation in impact positions depending on the distance between the ejection opening arrays becomes inconspicuous. | 09-03-2009 |
20090315949 | METHOD OF MANUFACTURING PRINT HEAD AND PRINT HEAD - The present invention provides a checker array print head configured to be able to output an image with possible white or black stripes made unnoticeable even when the conveyance direction of a print medium with respect to the ink jet print head is skewed. A first chip | 12-24-2009 |
20100045723 | INK-JET PRINTING APPARATUS AND INK-JET PRINTING METHOD - The print permitting ratios of the masks in the first to fourth passes of a C ink are respectively 6.2%, 37.5%, 37.5%, and 18.8%. On the other hand, the print permitting ratios of the masks in the first to fourth passes of an M ink are respectively 12.5%, 37.5%, 37.5%, and 12.5%. In this way, the respective masks are set such that a larger amount of the C ink is applied in a later pass as compared with the M ink. Thereby, it is possible to reduce an amount of the M ink to be applied later with respect to the C ink functioning to “reduce a permeation speed of an ink applied later by filling,” and it is possible to prevent a permeation speed from slowing down overall. As a result, it is possible to prevent the occurrence of beading due to a time to complete permeation becoming longer. | 02-25-2010 |
20110148959 | INK JET PRINTING APPARATUS, INK JET PRINTING METHOD, DATA GENERATING APPARATUS, AND STORAGE MEDIUM - 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. | 06-23-2011 |
20110148970 | INK JET PRINTING SYSTEM, INK JET PRINTING METHOD, AND STORAGE MEDIUM - 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. | 06-23-2011 |
20110187775 | RECORDING APPARATUS AND RECORDING METHOD - When a number of passes of multi-pass recording has been changed, a repetitive cycle of a drive pattern is changed, depending on change of feeding amount caused by change of the number of passes. Accordingly, the drive pattern is set to a size corresponding to the changed feeding amount. | 08-04-2011 |
20110261373 | DATA GENERATION APPARATUS, PRINTING APPARATUS AND DATA GENERATION METHOD - 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. | 10-27-2011 |
20120092404 | INK JET PRINTING APPARATUS AND INK JET PRINTING METHOD - 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. | 04-19-2012 |
20120188562 | IMAGE PROCESSING METHOD AND IMAGE PROCESSING APPARATUS - Provided is an image processing apparatus and image processing method that are capable of outputting an image wherein seam lines caused by sudden conveyance error are difficult to notice even for a small number of multi passes printing. In order to achieve this, the number of dots that are printed in pixels is adjusted according to the density level so that the number of dots that are printed in pixels corresponding to boundary portions is larger than in pixels corresponding to areas that are not boundary portions, and so that the number of dots that are printed in pixels corresponding to boundary portions increases the higher the density level of the pixels is. As a result, it is possible to avoid the occurrence of white stripes in high-density areas without emphasizing black stripes in low-density areas. | 07-26-2012 |
20120188582 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - In order to vary a threshold value for performing an error diffusion process depending on a pixel position, a threshold value matrix configured to have pluralities of rows and columns is prepared. In this case, pieces of data in the threshold value matrix are arrayed such that average values in the respective rows and average values in the respective columns are almost the same value. If such a threshold value matrix is used to perform the error diffusion process, the dot sparseness and denseness do not occur with a period of the matrix, and therefore the pattern or sweeping phenomenon specific to the error diffusion can be suppressed. | 07-26-2012 |
20120200625 | PRINT DATA GENERATION APPARATUS AND PRINT DATA GENERATION METHOD - An ink jet printing apparatus, for each level, employs a plurality of density patterns to prevent cancelation of a granularity reduction effect that has been provided by an increase in resolution. Specifically, when determining an arrangement of dot-on areas in the density pattern, the dot-on areas is not located in the areas of a first row of the each of the plurality of density patterns. Thereby, whitish areas appear with the same cycle as a use cycle of the density patterns in a longitudinal direction and thus the whitish areas is not unevenly located. As a result, granularity is prevented from increasing. | 08-09-2012 |
20120249646 | INKJET PRINTING APPARATUS AND INKJET PRINTING METHOD - 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. | 10-04-2012 |
20140184679 | PRINTING CONTROL APPARATUS, PRINTING APPARATUS, AND PRINTING METHOD - A printing apparatus performs printing using a print head in which a plurality of ejection port arrays are arranged in such a way as to form overlap portions. Ink is ejected such that a shape of a first boundary between images printed in a first unit region by ejection ports of a first ejection port array and a second ejection port array in an overlap portion and a shape of a second boundary between images printed in a second unit region in first and second operations of scanning continuously change in an array direction as positions of the first and second boundaries change in a cross direction and the shape of the second boundary becomes different from the shape of the first boundary. | 07-03-2014 |