Patent application number | Description | Published |
20080211850 | Liquid Ejecting Method and Liquid Ejecting Apparatus - A liquid ejecting method includes detecting a faulty nozzle in which an ejection fault occurs when a liquid should be ejected, calculating corrected tone values by correcting tone values of pixels adjacent to pixels at which the liquid should be ejected from the faulty nozzle based on a correction amount, and a liquid ejecting apparatus ejecting the liquid to the adjacent pixels based on the corrected tone values. | 09-04-2008 |
20080253607 | LINE POSITION CALCULATING METHOD, CORRECTION VALUE OBTAINING METHOD, AND STORAGE MEDIUM HAVING PROGRAM STORED THEREON - A line position calculating method is a method for calculating a position, in a second direction, of a line along a first direction in an image, based on image data of the image constituted by a plurality of pixels arranged in a matrix form in the first direction and in the second direction, the method obtains pixel data of each of a plurality of pixels arranged in the first direction, calculates an extent of unevenness of each tone value indicating the pixel data of each of the plurality of pixels arranged in the first direction, sets a threshold value according to the extent of unevenness, sets a range based on the threshold value, detects a defective pixel in which the tone value indicating the pixel data is out of the range, calculates a representative value indicating a tone value of a pixel row, based on the pixel data of the pixels other than the defective pixel of the plurality of pixels constituting the pixel row, and calculates a position, in the second direction, of the line, based on the representative value of each pixel row. | 10-16-2008 |
20090015615 | Liquid ejection control apparatus, liquid ejection control method and liquid ejection apparatus - A liquid ejection control apparatus which controls a liquid ejection mechanism having a plurality of nozzle groups made up of a plurality of nozzles, comprising: a correction data acquisition unit which acquires correction data for each nozzle group; an image data separation unit which inputs image data comprising a plurality of pixels and separates the image data into respective split image data, each comprising pixels which are to be formed for liquid ejection by the respective nozzle groups; a split image data correction unit which corrects the respective split image data, on the basis of the correction data for the nozzle groups to which the split image data respectively correspond; and an ejection execution control unit which executes liquid ejection by driving the respective corresponding nozzle groups, on the basis of the corrected split image data. | 01-15-2009 |
20090015616 | Liquid ejection control apparatus, liquid ejection control method and liquid ejection apparatus - A liquid ejection control apparatus which controls a liquid ejection mechanism having a plurality of nozzle groups made up of a plurality of nozzles for ejecting liquid, comprising: a usage ratio determination unit which determines a usage ratio between the plurality of nozzle groups when performing liquid ejection; a correction data generation unit which generates correction data corresponding to the determined usage ratio, by using respective correction data for correcting density of liquid ejection results corresponding respectively to a plurality of usage ratios between the nozzle groups; an image data correction unit which corrects prescribed image data on the basis of the generated correction data; and an ejection execution control unit which executes liquid ejection by driving the respective nozzle groups on the basis of the corrected image data and the determined usage ratio. | 01-15-2009 |
20090015623 | Liquid discharge apparatus, method for controlling the same, and program for controlling the same - Disclosed is a liquid discharge apparatus that allows a discharge head to discharge liquid to a predetermined object. The apparatus includes the following elements. A plurality of discharge heads are detachable independently. A head switching circuit switches a target discharge head to another target discharge head among the discharge heads in a set switching order to allow the target discharge head to discharge liquid. A monitoring circuit monitors liquid discharge conditions of the respective discharge heads. The liquid discharge conditions of each discharge head include the frequency of use of the discharge head and the presence or absence of a failure in the discharge head. A life determining circuit determines the life of each discharge head on the basis of the result of monitoring by the monitoring circuit. A target head setting circuit sets each of the discharge heads having a remaining life to the target discharge head and sets the switching order so that the frequencies of use of the target discharge heads are imbalanced. A notifying circuit provides a notification for urging replacement of the discharge head whose remaining life is lower than a predetermined value. | 01-15-2009 |
20090141078 | Liquid ejecting device - A liquid ejecting device includes a head unit having a first nozzle array and a second nozzle array that ejects a liquid of a same type as that of the first nozzle array and a movement mechanism that moves at least one between a target in which the liquid lands and the head unit in a movement direction that intersects with a direction of nozzle arrangement of each of the nozzle arrays. The second nozzle array is disposed in a position deviated from the first nozzle array in the movement direction and is disposed in a position deviated from the first nozzle array in the intersection direction such that an end part of the second nozzle array is located in a center part of the first nozzle array in the intersection direction that intersects with the movement direction. | 06-04-2009 |
20090195580 | Liquid ejection control device, liquid ejection control method, liquid ejection control program, and liquid ejection device - A liquid ejection control device controlling a liquid ejecting mechanism having a plurality of liquid ejection heads, includes a dividing unit to which image data consisting of a plurality of pixels is inputted and which divides the image data into a plurality of pieces of divided image data, each corresponding to pixels which undergo a liquid ejection, of each of the liquid ejection heads, a correction data acquiring unit which acquires correction data eliminating a deviation of liquid ejection locations of the plurality of liquid ejection heads, a correcting unit which corrects the divided image data on the basis of the correction data, and a liquid ejection controlling unit which performs liquid ejection control by which each of the liquid ejection heads is driven on the basis of the divided image data which is corrected. | 08-06-2009 |
20090213431 | METHOD FOR OBTAINING CORRECTION VALUE, LIQUID EJECTING DEVICE - A method for obtaining a correction value including: forming a first test pattern configured to include a plurality of pixel rows, each of which has a plurality of pixels arrayed in a predetermined direction, arrayed in a direction crossing the predetermined direction; obtaining a first read gray-scale value for every pixel row by making a scanner read the first test pattern; calculating a first correction value for every pixel row on the basis of the first read gray-scale value; forming a second test pattern, which is configured to include the pixel rows arrayed in the crossing direction, using the first correction value; obtaining a second read gray-scale value for every pixel row by making the scanner read the second test pattern; calculating a correction amount for every pixel row on the basis of the first read gray-scale value and the second read gray-scale value; and calculating a second correction value of the certain pixel row on the basis of the correction amount of the pixel row and the correction amount of the pixel row adjacent to the pixel row. | 08-27-2009 |
20090244153 | Method of calculating correction value and method of discharging liquid - A method of calculating a correction value including: forming a first test pattern on a medium by using a first nozzle group and a second nozzle group and a third nozzle group of a liquid discharging device, forming a second test pattern on the medium, setting the first test pattern in a scanner, setting the second test pattern in the scanner, acquiring a read-out result of a portion formed by the second nozzle group, and acquiring a read-out result of a portion formed by the third nozzle group from a read-out result of the second test pattern as a fourth read-out gray scale value, converting the first read-out gray scale value, the second read-out gray scale value, the third read-out gray scale value, and the fourth read-out gray scale value into corrected read-out gray scale values, and calculating a correction value based on the corrected read-out gray scale values. | 10-01-2009 |
20090244154 | Method of calculating correction value and method of discharging liquid - There is provided a method of calculating a correction value. The method includes forming a first test pattern on a medium by using a first nozzle group and a second nozzle group of a liquid discharging device including a nozzle row, in which a plurality of nozzles for discharging liquid is aligned in a predetermined direction, having the first nozzle group, the second nozzle group, and a third nozzle group, forming a second test pattern on the medium by using the second nozzle group and the third nozzle group of the liquid discharging device, setting the first test pattern in a scanner, acquiring a read-out result of a portion formed by the first nozzle group from a read-out result of the first test pattern as a first read-out gray scale value, and acquiring a read-out result of a portion formed by the second nozzle group from a read-out result of the first test pattern as a second read-out gray scale value, setting the second test pattern other than the first test pattern in the scanner, acquiring a read-out result of a portion formed by the second nozzle group from a read-out result of the second test pattern as a third read-out gray scale value, and acquiring a read-out result of a portion formed by the third nozzle group from a read-out result of the second test pattern as a fourth read-out gray scale value, calculating an average gray scale value that is an average value of the second read-out gray scale value and the third read-out gray scale value, and calculating a correction value of the second nozzle group based on the average gray scale value. | 10-01-2009 |
20090256877 | Method of calculating correction value, correctioin value calculating program, and liquid ejecting apparatus - A method of calculating a correction value includes forming a test pattern in which a dot row formed A method of calculating a correction value includes forming a test pattern in which a dot row formed by aligning dots in a direction intersecting a predetermined direction is aligned in the predetermined direction on a medium and forming information on the test pattern on the medium, calculating a correction value of the first nozzle group based on the pattern included in read-out data values in a case where the information included in the read-out data values represents that the test pattern is formed by a first nozzle group, and calculating a correction value of a second nozzle group based on the test pattern included in the read-out data values in a case where the information included in the read-out data values represents that the test pattern is formed by the second nozzle group. | 10-15-2009 |
20100026747 | PRINTING APPARATUS AND METHOD OF ADJUSTING NOZZLE ARRAY - A printing apparatus includes: a first nozzle array with nozzles aligned in a predetermined direction for ejecting liquid on a medium; a second nozzle array with nozzles aligned in the predetermined direction for ejecting liquid on the medium, the second nozzle array being aligned in a direction cross to the predetermined direction of the first nozzle array; and a moving mechanism for relatively moving the first nozzle array, the second nozzle array, and the medium in the moving direction. Here, when a plurality of dot arrays disposed along the moving direction is formed in a direction cross to the moving direction with a predetermined interval therebetween by using the nozzles belonging to the first nozzle array, and a plurality of dot arrays disposed along the moving direction is formed in a direction cross to the moving direction with a predetermined interval therebetween by using the nozzles belonging to the second nozzle array, the dot arrays are formed by a specific first nozzle among the nozzles belonging to the first nozzle array and a specific second nozzle among the nozzles belonging to the second nozzle array, and have a length different from the dot arrays formed by the other nozzles. | 02-04-2010 |
20100060691 | PRINTING METHOD AND PRINTER - [Task] To achieve reduction of the number of correction value tables. | 03-11-2010 |
20100194809 | Liquid Ejection Method and Liquid Ejection Apparatus - A liquid ejection method includes determining, according to image data, an ejection pixel that is a pixel at which a liquid is to be ejected and a non-ejection pixel that is a pixel at which a liquid is not to be ejected; determining, according to the image data, a nozzle requiring flushing; and ejecting liquid from the nozzle requiring flushing to the non-ejection pixel adjacent to the ejection pixel, the non-ejection pixel being among pixels associated with the nozzle requiring flushing. | 08-05-2010 |
20100201726 | FLUID EJECTING APPARATUS AND MANUFACTURING METHOD OF FLUID EJECTING APPARATUS - A manufacturing method of a fluid ejecting apparatus includes: forming first and second test patterns by ejecting fluid from first and second nozzle rows which intersect with a relative movement direction of a medium, wherein the first nozzle row forms the first test pattern by ejecting the fluid in accordance with a first driving pulse and the second nozzle row forms the second test pattern by ejecting the fluid in accordance with a second driving pulse; measuring the density of the first test pattern and the density of the second test pattern; and correcting a parameter of the first driving pulse and a parameter of the second driving pulse such that the density of the first test pattern and the density of the second test pattern become a common target density. | 08-12-2010 |
20100220140 | RECORDING APPARATUS AND TRANSPORTING METHOD - A recording apparatus of this invention includes a head; a transport mechanism that transports a medium in a transport direction with respect to the head, according to a target transport amount to be targeted; a memory that stores a plurality of correction values associated with a relative position of the head and the medium; and a controller that controls the transport mechanism based on the target transport amount that has been corrected, after correcting the target transport amount based on correction values, which are in number according to a size of the target transport amount, and which include the correction value according to the relative position when transporting by the target transport amount. | 09-02-2010 |
20110138608 | METHOD FOR MANUFACTURING PRINTING DEVICE - A dither mask is used in a halftone process that is performed by the printer that includes the preceding and following heads. The dither mask includes preceding and following head storage regions. The preceding head storage region is used for a printing portion of the preceding head. The following head storage region is used for a printing portion of the following head. The dither mask is generated by determining, using comprehensive evaluation values, storage elements in which thresholds are to be stored under the condition that dots are permitted to be formed by the preceding and following heads at the same position in the region corresponding the overlapping regions. | 06-16-2011 |
20130100191 | PRINTING APPARATUS AND PRINTING METHOD - A head unit is provided that includes a plurality of head groups having a first head and a second head in a direction which crosses a transport direction of a medium. Color difference is obtained which indicates difference in color between patches formed for each band using dots having the same dot diameter from among a plurality of patches based on the result of color measurement performed on a test pattern which includes the plurality of patches for each band, the plurality of patches being formed for each head group using dots having different dot diameters. The amount of first ink and the amount of second ink, which are respectively ejected from the first head and the second head which are included in all the head groups, are adjusted such that the dot diameter becomes the dot diameter which is determined based on the color difference. | 04-25-2013 |
20150054869 | DROPLET DISCHARGING METHOD AND DROPLET DISCHARGING APPARATUS - A droplet discharging method includes: forming a plurality of dots on a first region of a medium, on a second region which is positioned in a −Y direction from the first region, and on a third region which is positioned in the −Y direction from the second region. The dots are formed on the first region by using a first head and a second head to cause a second head use ratio to be constant, the dots are formed on the second region by using the first head and the second head so as to cause the second head use ratio to be increased from a value less than a first set value to a value greater than a second set value greater than the first set value in the −Y direction, and the dots are formed on the third region by using the second head. | 02-26-2015 |
20150054871 | DROPLET DISCHARGING METHOD AND DROPLET DISCHARGING APPARATUS - A droplet discharging method includes: forming a plurality of dots on a first region of a medium, on a second region which is positioned in a −Y direction from the first region, and on a third region which is positioned in the −Y direction from the second region. The dots are formed on the first region by using a first head, the dots are formed on the second region by using the first head and a second head so that a second head use ratio is increased from a value less than a first set value to a value greater than a second set value greater than the first set value in the −Y direction, and the dots are formed on the third region by using the first head and the second head to cause the second head use ratio to be constant. | 02-26-2015 |