| Patent application number | Description | Published |
|---|
| 20090085959 | Liquid ejecting apparatus and raster line forming method - An increase in the width in the first direction of the head unit is controlled and deterioration in image quality is curbed as well. A liquid ejecting apparatus according to the invention is a liquid ejecting apparatus including: a head unit that has a plurality of heads along a first direction, in which a plurality of nozzles that eject a liquid onto a medium are lined up in the first direction, and that ejects the liquid while moving relative to the medium in a second direction, which intersects the first direction, the head unit having a width in the first direction that is greater than a width of the medium in the first direction, a movement mechanism that makes the head unit move relative to the medium a plurality of times alternately in the second direction and the first direction, and a control section that forms a raster line group by forming each raster line by making two or more different nozzles that are different eject the liquid, respectively while making the movement mechanism move the head unit relative to the medium a plurality of times alternately in the second direction and the first direction, makes the movement mechanism move the head unit relatively so that a total amount of movement of the head unit in the first direction when the head unit has moved relatively the plurality of times is less than an effective nozzle width of one of the heads in the first direction, and forms the raster line group so that a number of the raster lines formed by making the nozzles of only one of the heads eject the liquid is not greater than a number of the raster lines formed by making the nozzles of two or more of the heads eject the liquid. | 04-02-2009 |
| 20090096828 | Liquid ejecting apparatus and method for moving medium - A liquid ejecting apparatus includes an upstream-side roller and an downstream-side roller, an ejecting section, and a controller. The controller stores in advance a correction value for correcting a pre-correction target transport amount for transporting the medium, the correction value being associated with a range from a first position to a second position. The controller carries out the transport operation based on a post-correction target transport amount in the case where the controller carries out the transport operation in such a manner as the medium is transported from a third position upstream in the transport direction from the second position to a fourth position downstream in the transport direction from the first position and the third position, the post-correction target transport amount being obtained by correcting, using the correction value, the pre-correction target transport amount for transporting the medium from the third position to the fourth position. | 04-16-2009 |
| 20090115805 | Liquid ejecting apparatus and image forming method - A liquid ejecting apparatus includes a head unit, a movement mechanism, and a control section. The head unit has along a first direction a plurality of heads, in which a plurality of nozzles that eject a liquid onto a medium are lined up in the first direction, and the head unit forms a single raster line by ejecting the liquid while performing m number of movements relative to the medium in a second direction, which intersects the first direction. A width of the head unit in the first direction is greater than a width of the medium in the first direction. The movement mechanism causes the head unit to perform a plurality of movements relative to the medium alternately in the second direction and the first direction. The control section forms an image having a resolution that is n times a pitch of the nozzles, by forming a plurality of the raster lines by the plurality of relative movements of the head unit. Further, the control section sets a total movement amount of the head unit in the first direction when the head unit performs the plurality of relative movements, larger than an effective nozzle width of one of the heads in the first direction multiplied by (m×n−1), and smaller than the effective nozzle width×(m×n). Furthermore, the control section forms the image by setting respective movement amounts of the head unit in the first direction when the head unit performs the plurality of relative movements, larger than the effective nozzle width. | 05-07-2009 |
| 20090237689 | Concentration correcting method - A concentration correcting method includes: forming N test patterns at different positions in a moving direction by repeatedly performing a dot line forming process of forming a dot line in a line region on a test medium in which a plurality of unit areas is arranged in the moving direction by ejecting liquid from nozzles direction and a transport process of transporting the test medium in a transport direction; performing on the N test patterns a process of calculating a concentration correction value, which is used to correct concentrations of the unit areas in a print image; and correcting the concentrations of the unit areas in the print image by the use of interpolated correction values obtained using a linear interpolation method, two concentration correcting values acquired from the two test patterns, and positions of the unit areas in the moving direction. | 09-24-2009 |
| 20090278882 | Method of calculating correction value, method of ejecting liquid, and liquid ejecting apparatus - A method of calculating a correction value includes: forming a test pattern by ejecting a liquid by a liquid ejecting apparatus, which has a first nozzle row in which a plurality of nozzles ejecting the liquid to a medium are arranged in a predetermined direction and a second nozzle row in which a plurality of nozzles ejecting the liquid to the medium are arranged in the predetermined direction, the second nozzle row being disposed so that an end portion on one side thereof in the predetermined direction overlaps with an end portion on the other side of the first nozzle row in the predetermined direction, to an area of the medium corresponding to certain pixel data on the basis of the certain pixel data from first nozzles belonging to the end portion on the other side of the first nozzle row and second nozzles belonging to the end portion on the one side of the second nozzle row; acquiring a read-out gray scale value by allowing a scanner to read-out the test pattern; and calculating a correction value used to correct the pixel data corresponding to the area to which the liquid is ejected from the first and the second nozzles on the basis of the read-out gray scale value. | 11-12-2009 |
| 20100245441 | FLUID EJECTING APPARATUS AND METHOD OF CORRECTING PIXEL DATA - A fluid ejecting apparatus and a method for correcting pixel data are disclosed. The fluid ejecting apparatus includes a nozzle line having nozzles which eject fluid onto a medium and are lined up in a predetermined direction; a moving mechanism relatively moving the nozzle line and the medium in a direction intersecting the predetermined direction; and a control unit that ejects the fluid from the nozzle line while relatively moving the nozzle line and the medium in the intersecting direction by using the moving mechanism, based on pixel data of the predetermined number of gradations according to certain kinds of dots which can be formed by the fluid ejected from the nozzles, the control unit correcting the pixel data of the predetermined number of gradations in accordance with the correction value set for every image line data which is the plurality of pixel data lined up in a direction corresponding to the intersecting direction in the pixel data. | 09-30-2010 |
| 20100245871 | METHOD OF CORRECTING PIXEL DATA AND FLUID EJECTING APPARATUS - A method for correcting pixel data and a fluid ejecting apparatus and are disclosed. The method for correcting pixel data in the fluid ejecting apparatus which relatively moves a nozzle array having nozzles for ejecting a fluid onto a medium and arranged in parallel in a predetermined direction, and the medium in a direction intersecting the predetermined direction, onto which the fluid is ejected from the nozzle array based on pixel data of the first number of gradations, while the nozzle array and the medium are relatively moved in the intersecting direction, the method includes converting original pixel data of the first number of gradations into pixel data of the second number of gradations higher than the first number of gradations; correcting the pixel data of the second number of gradations, of which the number of gradations is converted, by a correction value set for every pixel line data which is the plurality of pixel data lined up in a direction corresponding to the intersecting direction on the pixel data; and converting the pixel data of the second number of gradations which is corrected by the correction value into the pixel data of the first number of gradations. | 09-30-2010 |
| 20100253728 | CORRECTION VALUE CALCULATING METHOD AND METHOD OF MANUFACTURING LIQUID EJECTING APPARATUS - There is provided a method of calculating a correction value in a liquid ejecting apparatus in which a plurality of heads is arranged in a predetermined direction and each of the heads has a nozzle row in which nozzles ejecting a liquid on a medium are arranged in the predetermined direction. The method includes: forming a first and second pattern by a first and second operation; and calculating, on the basis of the first pattern, a first correction value and, on the basis of the first and second patterns, a second correction valve to line up a landed position of the liquid ejected in the first operation and the second operation. | 10-07-2010 |
| 20110235125 | PRINTING APPARATUS, CORRECTION VALUE CALCULATING METHOD, AND STORAGE MEDIUM - A correction value calculating method includes: printing a pattern based on an instruction gray scale value indicating a predetermined density; acquiring a read gray scale value, which is a result obtained when a scanner reads the pattern, for each line area; calculating a first correction value, which is a correction value of each line area corresponding to a middle portion of the pattern, based on the read gray scale value of each line area corresponding to the middle portion of the pattern; and calculating a second correction value, which is a correction value of the line area corresponding to an end portion of the pattern in the predetermined direction, based on the read gray scale value of the line area in the vicinity of the line area corresponding to the end portion of the pattern. | 09-29-2011 |
