Patent application number | Description | Published |
20080252675 | PRINTING APPARATUS AND THE METHOD OF ACQUIRING CORRECTION VALUE OF CONVEYING ERROR - While a conveying error of a roller depends on the eccentricity of the roller, the amount and the state of the eccentricity sometimes makes the roller have different conveying errors from one point in the longitudinal direction of the roller to another. There is provided a construction for obtaining a correction value that is suitable for the correction of the conveying error even in such a case as described above. To this end, plural test patterns are formed in the longitudinal direction of the roller. Then, a suitable correction value for correcting the conveying error that depends on the eccentricity of the roller is obtained on the basis of these test patterns. | 10-16-2008 |
20080252676 | PRINTING APPARATUS AND METHOD OF ACQUIRING CORRECTION VALUE OF CONVEYING ERROR - The sequence of the acquisition of a correction value of a conveying error depending on the eccentricity of the conveying roller (correction value for eccentricity) and the acquisition of a correction value of a conveying error depending on the outer diameter of the roller (correction value for outer diameter) is considered to acquire a precise correction value for outer diameter. A test pattern to acquire the correction values for eccentricity and for outer diameter is formed with an area exceeds the area corresponding to an integer multiple of the circumferential length of the roller. The correction value for eccentricity and that for outer diameter are acquired in this sequence. The fluctuation in the conveying error is reduced by the application of the correction value for eccentricity, and the influence of the excess area is made smaller before the correction value for outer diameter is acquired by averaging the conveying errors. | 10-16-2008 |
20080252677 | PRINTING APPARATUS AND CONVEYING CONTROL METHOD - Provided are a printing apparatus and a conveying-error controlling method capable of printing a high-quality image by correction reflecting the conveying amount of a printing medium. A provided inkjet printing apparatus prints images by printing scans for actual printing and by conveying the printing medium with a roller orthogonally to the printing-scan direction. In each printing scan, the printing medium is scanned with a print head having an array of nozzles from which the ink is ejected. The print head moving direction differs from the arranging direction of the nozzles in the array. The apparatus includes a conveying controller to control the conveying of the printing medium on the basis of a correction value used to correct a conveying error of the roller. The conveying controller changes the correction value to be applied in accordance with the conveying amount of the printing medium between two scans with the print head. | 10-16-2008 |
20080252710 | SHEET CONVEYING APPARATUS, PRINTING APPARATUS, CORRECTION INFORMATION ACQUIRING APPARATUS, PRINTING SYSTEM, METHOD OF CONVEYING SHEETS AND METHOD OF ACQUIRING CORRECTION INFORMATION - Performed is conveying-error correction in accordance with the kind and the number of rollers that are actually involved in the conveying of a printing medium. Each of the rollers that are potentially involved in the conveying of the printing medium has a unique amount of eccentricity, and may affect the quality of image to be printed in a peculiar manner. To address this problem, a surface of the printing medium is divided into areas according to the number and the combination of the rollers that are actually involved in the conveying. A pattern each is printed for each of the areas thus formed while the pattern enables the detection of the conveying error. A correction value to correct the conveying error is calculated using each of the patterns. The correction values thus obtained are reflected in the conveying of the printing medium. | 10-16-2008 |
20080266348 | PRINTING APPARATUS - The present invention aims to obtain preferable correction values to correct the conveying error of a conveying roller in accordance with the size of a printing medium, even when the conveying error caused by the eccentricity of the roller varies from a point to another in the longitudinal direction of a roller, depending on the amount and the state of eccentricity of the roller. To achieve this object, correction values are acquired using the whole part of or only a part of plural test patterns formed in the longitudinal direction of the roller. The correction values thus acquired correspond to the respective zones where the test patterns are formed. | 10-30-2008 |
20090021551 | METHOD OF MEASURING PRINTER CHARACTERISTICS | 01-22-2009 |
20090051725 | INK-JET PRINTING APPARATUS, CONTROL METHOD THEREFOR, PROGRAM, AND STORAGE MEDIUM - An object of this invention is to prevent prolongation of the time taken for a suction recovery operation while suppressing wasteful consumption of ink in the suction recovery operation. An ink-jet printing apparatus includes a plurality of caps which, when a plurality of nozzles of an ink-jet head are divided into a plurality of nozzle groups, are arranged one by one for the respective nozzle groups, and cap the respective nozzle groups, a suction pump which generates a negative pressure in the plurality of caps to suck ink from the plurality of nozzles, and is arranged commonly for the plurality of caps, and a control unit which controls the suction pump so as to make the negative pressure by the suction pump act on all the caps when a common negative pressure is generated in the plurality of caps, and make different negative pressures by the suction pump act sequentially on the plurality of caps when different negative pressures are generated in the respective caps. | 02-26-2009 |
20090116069 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING PROCESS AND PROGRAM - In an image processing method, on the basis of input image data with respect to a target pixel, independent multi-level data (g | 05-07-2009 |
20090315934 | INK JET PRINTING APPARATUS - An ink jet printing apparatus that can inhibit the possible degradation of image quality caused by variation in the conveyance amount of a print medium is provided. The ink jet printing apparatus includes a detection section detecting the conveyance amount of the print medium, and a print head position adjusting section slightly moving a print head in a conveyance direction of the print medium. The print head position adjusting section adjusts the position of the print head in the conveyance direction according to an error in the conveyance amount of the print medium detected by the detection section. Thus, printing can be performed at the head position adjusted with the error in conveyance amount taken into account. Therefore, the possible degradation of the image quality caused by a conveyance variation can be inhibited. | 12-24-2009 |
20090323094 | CONVEYING APPARATUS AND PRINTING APPARATUS - The apparatus comprising: a mechanism for moving an object; an information acquisition unit acquiring a driving amount information of the mechanism; a sensor for capturing a surface of the object; a processing section for processing a first image data and a second image data acquired by the sensor at different timings; and a control unit for controlling the mechanism, wherein: the processing section performs processings of: (a) cutting out an image pattern of a part of the first image data; (b) limiting a search range in the second image data within which a similar region similar to the image pattern is searched; (c) searching the similar region within the limited search range in the second image data; and (d) obtaining the moving information of the object based on a positional relation between the image pattern in the first image data and the similar region in the second image data. | 12-31-2009 |
20100044947 | RECORDING APPARATUS AND RECORDING METHOD - A recording apparatus includes a conveying roller and an ejection roller for conveying a recording medium. The recording apparatus also includes a controller which controls the conveying roller and the ejection roller. The controller selectively performs a conveyance control process for the rollers when the recording medium leaves the conveying roller. | 02-25-2010 |
20100149245 | RECORDING APPARATUS AND RECORDING METHOD - In the present invention, a conveying operation of a recording medium is controlled on the basis of a first correction value and a second correction value. The first correction value is used for correcting a conveying amount when the recording medium disengages from a first conveying roller, and the second correction value is used for correcting the phase of the first conveying roller and a second conveying roller when the recording medium disengages from the first conveying roller before the recording medium is nipped by the first conveying roller. | 06-17-2010 |
20100309249 | INK JET PRINTING APPARATUS - A plurality of ejection portions are divided into groups, each containing at least one ejection portion, so that the suction-based recovery operation can be performed for each group independently. Since the number of ejection portions contained in each group differs, if an ink flow resistance varies among the different groups, simultaneous suction-based recovery operations can be done by using a common suction pump, without having to sequentially perform the suction-based recovery operations under an optimum pump driving condition. For this purpose, inner diameters of a plurality of ink discharge tubes running from a plurality of cap units, which cap a plurality of print head units having different numbers of ejection portions, to the common pump are differentiated. This allows different flows to be produced in different ink discharge systems, thus generating desirable ink flows for individual ink supply systems. | 12-09-2010 |
20110057980 | PRINTING APPARATUS AND METHOD OF ACQUIRING CORRECTION VALUE OF CONVEYING ERROR - The sequence of the acquisition of a correction value of a conveying error depending on the eccentricity of the conveying roller (correction value for eccentricity) and the acquisition of a correction value of a conveying error depending on the outer diameter of the roller (correction value for outer diameter) is considered to acquire a precise correction value for outer diameter. A test pattern to acquire the correction values for eccentricity and for outer diameter is formed with an area exceeds the area corresponding to an integer multiple of the circumferential length of the roller. The correction value for eccentricity and that for outer diameter are acquired in this sequence. The fluctuation in the conveying error is reduced by the application of the correction value for eccentricity, and the influence of the excess area is made smaller before the correction value for outer diameter is acquired by averaging the conveying errors. | 03-10-2011 |
20110069100 | INK JET PRINTING APPARATUS AND PRINTING METHOD - By suppressing deviation of dot-formation positions stemming from insufficient accuracy in conveying a printing medium due to eccentricity of a conveying roller, a printed image in which unevenness is less visible is obtained. An accumulated amount of conveyance errors is decreased by narrowing a nozzle-use range and reducing a conveyance amount over an entire printing region according to a mode used for printing an image in which the coverage of a printing medium is low due to a small number of ink colors to be used, for example, a mode used for printing a monochrome image by using a black ink dominantly in all of the density regions. | 03-24-2011 |
20110242176 | PRINTING APPARATUS, PRINTING METHOD, AND DATA GENERATING APPARATUS - The first printing mode improves gloss uniformity by setting the colorless ink discharge amount to be equal to or smaller than a reference value A at a dark image portion in input image data, and performing normal discharge printing in which printing with a colorless ink starts before completion of printing with a color ink (FIG. | 10-06-2011 |
20120044297 | PRINTING APPARATUS AND PRINTING METHOD - A printing apparatus and a printing method are provided by which, when an image is printed by a plurality of printing modes using different printing elements, a plurality of printing elements can have an equalized use frequency to thereby maintain the uniformity of quality of the printed image. In a first multipath printing control, a use rate of a nozzle group that is not used in the first multipath printing control and that is used in a second multipath printing control is higher than that of a nozzle group that is used in the first and second multipath printing controls. | 02-23-2012 |
20120182346 | RECORDING APPARATUS AND RECORDING METHOD - In the present invention, a conveying operation of a recording medium is controlled on the basis of a first correction value and a second correction value. The first correction value is used for correcting a conveying amount when the recording medium disengages from a first conveying roller, and the second correction value is used for correcting the phase of the first conveying roller and a second conveying roller when the recording medium disengages from the first conveying roller before the recording medium is nipped by the first conveying roller. | 07-19-2012 |
20120206529 | PRINTING APPARATUS AND METHOD OF ACQUIRING CORRECTION VALUE OF CONVEYING ERROR - While a conveying error of a roller depends on the eccentricity of the roller, the amount and the state of the eccentricity sometimes makes the roller have different conveying errors from one point in the longitudinal direction of the roller to another. There is provided a construction for obtaining a correction value that is suitable for the correction of the conveying error even in such a case as described above. To this end, plural test patterns are formed in the longitudinal direction of the roller. Then, a suitable correction value for correcting the conveying error that depends on the eccentricity of the roller is obtained on the basis of these test patterns. | 08-16-2012 |
20120287197 | PRINTING APPARATUS AND THE METHOD OF ACQUIRING CORRECTION VALUE OF CONVEYING ERROR - While a conveying error of a roller depends on the eccentricity of the roller, the amount and the state of the eccentricity sometimes makes the roller have different conveying errors from one point in the longitudinal direction of the roller to another. There is provided a construction for obtaining a correction value that is suitable for the correction of the conveying error even in such a case as described above. To this end, plural test patterns are formed in the longitudinal direction of the roller. Then, a suitable correction value for correcting the conveying error that depends on the eccentricity of the roller is obtained on the basis of these test patterns. | 11-15-2012 |
20130010026 | RECORDING APPARATUS AND RECORDING METHOD - A recording apparatus to record an image on a recording medium using a recording head includes a first conveying roller, a second conveying roller, and a controller. The first conveying roller is positioned upstream of the recording head in a conveying direction and the second conveying roller is positioned downstream of the recording head in the conveying direction. In response to a first conveying mode being selected, the controller performs a rotational phase control in which the controller controls rotational phases of the first conveying roller and the second conveying roller such that the recording medium is conveyed by predetermined sections of circumferences of the first conveying roller and the second conveying roller when a trailing end of the recording medium passes the first conveying roller. In response to the second conveying mode being selected, the controller does not perform the rotational phase control. | 01-10-2013 |
20130084439 | IMAGE PROCESSING APPARATUS, INKJET PRINTING APPARATUS AND IMAGE PROCESSING METHOD - The use amount of clear ink is set to minimum the hue difference Δθs−d from each of the colors corresponding to input signal values. The use amount of the clear ink to provide the minimum hue difference Δθs−d is varied depending on the use amount of color ink used for the color corresponding to the input signal value. Then, a color conversion table having output values of the use amount and ink color data corresponding to the use amount is set. The color conversion in such a relationship is performed, whereby the bronzing color is recognized as a color close to the print color. As a result, undesired bronzing is lessened, so that degradation in image quality can be suppressed. | 04-04-2013 |
20130088537 | PRINTING APPARATUS AND PROCESSING METHOD THEREOF - A printing apparatus comprising, a printhead including an element array in which a plurality of printing elements are arrayed, scanning unit configured to reciprocally scan the printhead, driving unit configured to time-divisionally drive the printing elements, conveyance unit configured to convey a printing medium, and setting unit configured to set a driving order, wherein the conveyance unit performs a first conveyance operation of conveying the printing medium by a conveyance amount which is an integer multiple of a width of the group of the time-divisional driving, and a second conveyance operation of conveying the printing medium by a conveyance amount which is not an integer multiple of the width of the group, and the setting unit sets the driving order in the time-divisional driving for each scan based on the conveyance amount by the conveyance unit. | 04-11-2013 |
20130300788 | IMAGE PROCESSING APPARATUS, INKJET PRINTING APPARATUS, AND INKJET PRINTING METHOD - In a color mode, the image quality improving liquid is set to the same rate of 20% for all input signal values. Meanwhile, in a monochrome mode, the image quality improving liquid is set to a rate of 30% in the highlight region, and the ink rate gradually decreases starting from the intermediate tones and proceeding towards the high-density region. Thus, the optimal printing method and usage rate for image quality improving liquid can be adjusted in accordance with the image quality characteristics of the color mode and the monochrome mode. As a result, it is possible to reduce color change in specular light while maintaining at least a certain level of image clarity in both modes, and thus favorably print both color images and monochrome images. | 11-14-2013 |
20130300790 | INKJET PRINTING APPARATUS - Provided is an inkjet printing apparatus that, when performing multi-pass printing using pigmented ink and image enhancing liquid for adjusting the glossiness, is capable of outputting a high-quality image in which gloss unevenness due to displacement of the printing position cannot be noticed. In order to accomplish this, dot arrangement data is generated based on input image data so that the dot arrangement of image enhancing liquid includes a greater low-frequency component in the spatial frequency than the dot arrangement of colored ink on a print medium. As a result, it is possible to suppress gloss unevenness even when printing position displacement occurs, while at the same time suitably suppressing a feeling of graininess in colored ink. | 11-14-2013 |
20130300791 | IMAGE PROCESSING APPARATUS, INKJET PRINTING APPARATUS, AND INKJET PRINTING METHOD - In a color mode, among clear ink data CL | 11-14-2013 |
20130301066 | IMAGE PROCESSING APPARATUS - Provided is an ink jet printing apparatus that, without causing an increase in apparatus size, can print an image having high evenness in both of image clarity and glossiness regardless a gradation or gamut of the image. For this purpose, on the basis of input image data, pieces of multivalued color data respectively corresponding to colored inks, and first multivalued data and second multivalued data that correspond to image enhancing liquid are generated. On a print medium, the colored inks and the image enhancing liquid according to the first multivalued data are printed at nearly the same timing, and after the printing of them has been completed, the image enhancing liquid according to the second multivalued data is printed. In doing so, gloss properties appearing on the print medium can be made to fall within certain ranges, respectively, independently of input image data. | 11-14-2013 |
20140205813 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - One objective of the present invention is to provide an image processing apparatus and an image processing method, whereby a difference of gloss at irregular, very small portions can be appropriately reproduced. The image processing apparatus determines, based on image data for an image to be printed on a print medium, amounts of a color printing material for printing the image on the print medium and an image quality control material for adjusting glossiness of the image, and obtains information on an unevenness level of a surface of the image based on the image data. In the above determining, the amount of the image quality control material to be applied to the print medium is determined based on the unevenness level indicated by the obtained information. | 07-24-2014 |
20140375717 | INK JET PRINTING APPARATUS AND INK JET PRINTING METHOD - Printing with color material inks is performed in an area (i.e., a unit area) having a width of 128 pixels by scanning four times. In contrast, in a mask pattern for a colorless ink, there are no ON dots at portions corresponding to the first pass to the fourth pass whereas there are ON dots in mask areas corresponding to a fifth pass and a seventh pass. Specifically, printing with respect to the unit area is completed by scannings eight times consisting of alternately forward scan and backward scan. In this case, the printing with the colorless ink is performed in the fifth pass and the seventh pass, that is, scanning in the same direction. In this manner, the dot printing misregistration with the colorless ink is reduced, thus suppressing the fluctuation of coverage with respect to the color material inks. | 12-25-2014 |
20150015640 | PRINTING APPARATUS AND PROCESSING METHOD THEREOF - A printing apparatus comprising, a printhead including an element array in which a plurality of printing elements are arrayed, scanning unit configured to reciprocally scan the printhead, driving unit configured to time-divisionally drive the printing elements, conveyance unit configured to convey a printing medium, and setting unit configured to set a driving order, wherein the conveyance unit performs a first conveyance operation of conveying the printing medium by a conveyance amount which is an integer multiple of a width of the group of the time-divisional driving, and a second conveyance operation of conveying the printing medium by a conveyance amount which is not an integer multiple of the width of the group, and the setting unit sets the driving order in the time-divisional driving for each scan based on the conveyance amount by the conveyance unit. | 01-15-2015 |