Patent application number | Description | Published |
20080278530 | PRINTING APPARATUS AND METHOD FOR ESTIMATING AMOUNT OF INK - The present invention provides a printing apparatus which is capable of estimate an amount of remaining ink with high accuracy by using ejection of ink from a printing head while restraining a consumption of ink during the estimation of the remaining ink amount, and also provides a method for estimating an amount of ink. An amount of ink ejected per unit time during the ink ejection for estimation of the remaining ink amount is set to be larger than an amount of ink ejected per unit time during printing. | 11-13-2008 |
20090002777 | RECORDING APPARATUS - A recording apparatus, performing recording by time-division driving of multiple recording elements on a recording head in increments of blocks, includes: a storing unit storing recording data; an obtaining unit obtaining information relating to inclination of the recording elements in the main scanning direction; a changing unit changing, in increments of recording elements, the main scanning direction storage position of recording data stored in the storing unit to be provided to recording elements of a group, configured of consecutive recording elements in each block of the recording elements, based on the obtained information; and a determining unit determining the driving order of the recording elements subjected to time-division driving in increments of the blocks, for each of the scans; wherein recording is performed based on recording data with the main scanning direction storage position having been changed by the changing unit, and the driving order determined by the determining unit. | 01-01-2009 |
20090091599 | INK JET PRINTING APPARATUS AND INK JET PRINTING METHOD - The order of the arrangement of ejection opening arrays of two types of ink overlapping in reciprocating scan is decided as follows. An ejection order is decided so that the case where the fixing areas of a main droplet and a satellite are different (dot area is increased) in the forward and backward scan first occurs. By this configuration, the area of the dot and the portion in which different colors are generated due to the difference in the overlapping order in the reciprocating scan can be reduced, compared with the case where the arrangement order is opposite to the above-described case. As a result, a difference in color between areas for which printing is completed by the reciprocating scanning is reduced and thus color unevenness of a printed image can be reduced. | 04-09-2009 |
20090135226 | INK JET PRINT HEAD AND INK JET PRINTING APPARATUS - When paper dirt that could not be removed completely by the wiping gets trapped in the recessed portions formed in the ejection port face, the paper dirt may interfere with ejection ports, giving rise to a possibility of image impairments. To deal with this problem, the ejection ports and the recessed portions in the print head are shifted from each other so that their positions are not aligned in the wiping direction. | 05-28-2009 |
20090141059 | PRINTHEAD, PRINTING APPARATUS, AND PRINTHEAD DRIVING METHOD - A printhead includes a driving unit configured to drive a plurality of heaters, a register configured to input data of a plurality of bits corresponding to the number of heaters, a latch configured holding the data transferred from the register; a generation unit configured to generate a control signal of the driving unit for each heater based on a value of the data and a change in a level of an enable signal including a plurality of pulse signals; and an output unit outputting the control signal generated by the generation unit to the driving unit in synchronism with the pulse signals. | 06-04-2009 |
20090201354 | LIQUID EJECTION HEAD - The present invention provides a liquid ejection head which includes a plurality of ejection ports | 08-13-2009 |
20090231380 | INKJET PRINTING APPARATUS AND METHOD OF PREDICTING - There are provided an inkjet printing apparatus and a method of predicting which can perform an accurate ink remaining amount detection. An inkjet printing apparatus is for performing printing onto a print medium by using a print head including an energy generating element generating energy used for ejecting ink from an ejection opening. The apparatus has a print head temperature detecting unit, an atmosphere temperature detecting unit and a predicting unit. The predicting unit drives the energy generating element at the time a difference between the temperature of the print head before driving the energy generating element and the atmosphere temperature detected by the atmosphere temperature detecting unit is less than a predetermined temperature. | 09-17-2009 |
20090244161 | INK JET PRINTING APPARATUS AND PRINT HEAD RECOVERY METHOD - An ink jet printing apparatus and a print head recovery method are provided which effectively execute a preliminary ejection to eject ink not contributing to image printing from nozzle opening of the print head to maintain the ink ejection performance in good condition. The ink in the print head is heated to a first temperature, at which a first preliminary ejection is executed. Then, when the ink temperature falls to a second temperature, which is lower than the first temperature, a second preliminary ejection is executed. | 10-01-2009 |
20090256879 | INKJET PRINTING APPARATUS AND INKJET PRINTING METHOD - There are provided an inkjet printing apparatus and an inkjet printing method, whereby, the temperature of a print head is controlled and the ejection volume of ink to be ejected is stabilized to print a high-quality image, even at a high printing duty. Based on print data, an ejection number of ink to be ejected into a unit printing area is counted. The print head is heated to a target temperature that is raised in consonance with an increase in the count value. | 10-15-2009 |
20100238226 | PRINTING APPARATUS AND PRINTING CONTROL METHOD - The present invention uses a temperature sensor to sense the temperature of a print head configured to eject ink, and senses the environmental temperature of a printing apparatus. The temperature of the print head is corrected based on the environmental temperature only if information from the temperature sensor is different from the last information acquired. | 09-23-2010 |
20100309242 | RECORDING APPARATUS AND METHOD FOR ADJUSTING RECORDING POSITION - According to the present invention, a recording apparatus is provided which is capable of recording a plurality of patterns, on a recording medium, for detecting an amount of displacement between a recording position of a first discharge port array and a recording position of a second discharge port array in a conveyance direction and acquiring an amount of inclination based on the amount of displacement without conveying the recording medium. | 12-09-2010 |
20110037799 | PRINTING APPARATUS AND PRINTING METHOD - Degradation in image quality due to disturbance in landing positions of satellites is suppressed. When scanning and printing with a printing head which has a first nozzle array ejecting relatively large ejection amount of ink, a second nozzle array arranged on one side of the first nozzle array in a scan direction and a third nozzle array arranged on the other side of the first nozzle array in the scan direction, the second and third nozzle arrays ejecting a relatively small ejection amount of ink with the same color, a printing rate of one of the second and third nozzle arrays located at the front side in the scan direction is controlled lower than that of the other located at the back side. | 02-17-2011 |
20110037806 | PRINTING APPARATUS AND PRINTING METHOD - Quality degradation of a print image due to a deviation amount in a landing position of ink is prevented while suppressing degradation of through-put. In a method of completing a print to a unit region by at least one reciprocal scan to the unit region of a print medium by a printing head in which plural ink ejection ports are arrayed for ejecting ink, a printing rate in a scan direction where a deviation amount in a landing position of ink in an array direction of the ink ejection ports is relatively large is set relatively low and the printing rate in the scan direction where the deviation amount in the landing position of ink in the array direction of the ink ejection ports is relatively small is set relatively high. | 02-17-2011 |
20120026227 | INK JET PRINTING APPRATUS AND PRINTING METHOD - An ink jet printing apparatus and printing method are provided that can, without the addition of a special structure, suppress density imbalance between the print images formed by ink ejected from each of the ejection ports formed on a print head. As for the plurality of ejection ports, one portion of them are established as multiple impact ejection ports that form multiply impacted pixels at which the number of times ink is impacted at the same area is greater than at other pixels of the print area. And, print control is carried out such that more multiply impacted pixels are printed at print areas printed using ejection ports at the ends of the print head than at print areas printed without using ejection ports at the ends of the print head. | 02-02-2012 |
20120062636 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - There is provided an image processing apparatus in which in a case of tone-expressing one pixel corresponding to a plurality of areas (printing resolution) in a multi-pass print, it is possible to output a uniform image without graininess or density unevenness over all-tone regions from a low-density region to a high-density region. To this end, by referring to dot patterns in which a print or a non-print of dots onto each pixel (area) corresponding to a printing resolution are in advance defined, quantization data is converted into binary data having the higher printing resolution. At this time, the dot patterns are prepared to be different from each other for M times of scans in a multi-pass print of M passes. In consequence, it is possible to restrict a variation of a coverage ratio due to a printing position displacement in each printing scan. | 03-15-2012 |