摘要:
In an inkjet printing method of performing printing on a printing medium by ejecting inks from a printing head configured to eject chromatic inks and an achromatic ink while moving the printing head, high-quality printing with few boundary stripes produced when the amount of inks is large is realized without complicated control being performed. To this end, print data in a boundary and the vicinity thereof is divided into unit regions, and for each unit region, performed are (A) a first reduction processing which determines a hue of the unit region based on amounts of the chromatic inks, and reduces the amount of chromatic inks applied to the unit region according to the determined hue; and (B) a second reduction processing which reduces an amount of achromatic ink based on the amount of achromatic ink applied to the unit region.
摘要:
On performing a predetermined printing operation, whether or not, among a plurality of printing elements, only a part of the printing elements are applied is detected. If it is judged that only the part of the printing elements are used, a judgment is made whether or not the preliminary discharge operation is performed based on the number of discharges for the part of the printing elements, and if it is not judged that only the part of the printing elements are used, a judgment is made whether or not the preliminary discharge operation is performed based on the number of discharges for all of the printing elements of the printing head. This eliminates an unnecessary preliminary discharge for non-printing elements even in a printing operation mode in which only a part of the printing elements are applied.
摘要:
By subtracting a first parameter related to the printing position deviation inherent to the printing head from a second parameter that is obtained by actually measuring the printing position deviation in a state where the printing head is mounted on the printing apparatus, a third parameter related to the printing position deviation inherent to the printing apparatus is acquired. When a new printing head is mounted on the printing apparatus, a new second parameter is computed from the third parameter and a first parameter that is of the new printing head. By this procedure, it is possible to hold down a time required for actual measurement of the printing position deviation and consumables, and even when the printing head is exchanged, it becomes possible to stably output a uniform image free from the printing position deviation.
摘要:
After a first scan in a forward direction, conveying corresponding to one nozzle block is performed, and then in a second scan in a backward direction, printing of a “printing area 1,” which is a unit area, is completed. Then after completion of printing of the unit area, conveying corresponding to 14 nozzle blocks is performed. Then by reciprocal third and fourth scans, printing of a “printing area 2” is completed in a likewise manner. Subsequently, two scans in a reciprocal manner are performed in a likewise manner to perform printing of each unit area. In any unit area, printing time intervals between scans are such that, at a same position in a scan direction, the time interval is the same. Consequently, differences in density between unit areas that are adjacent in a conveying direction of a printing medium, that is, between-band unevenness becomes more difficult to recognize.
摘要:
An inkjet printing apparatus and a print position correction method are provided which, even if satellites are produced, can evaluate printed position misalignments of main droplets without being influenced by the satellites and correctly perform a print position correction. To this end, when the test patterns are printed, the carriage speed and the head-medium distance are set smaller than those used during normal printing operations so as to keep the influences of the satellites on the printed patterns minimal. From the printed test patterns an amount of print position misalignment is acquired. Before actually executing a normal printing operation, an amount of the print position misalignment corresponding to the carriage speed and the head-medium distance of the actual printing operation is determined based on the amount of misalignment obtained from the test patterns and the print position adjustment is made using the determined amount of the print position misalignment.
摘要:
By subtracting a first parameter related to the printing position deviation inherent to the printing head from a second parameter that is obtained by actually measuring the printing position deviation in a state where the printing head is mounted on the printing apparatus, a third parameter related to the printing position deviation inherent to the printing apparatus is acquired. When a new printing head is mounted on the printing apparatus, a new second parameter is computed from the third parameter and a first parameter that is of the new printing head. By this procedure, it is possible to hold down a time required for actual measurement of the printing position deviation and consumables, and even when the printing head is exchanged, it becomes possible to stably output a uniform image free from the printing position deviation.
摘要:
A recording apparatus includes a recording unit configured to record a first dot and a second dot having a diameter smaller than that of the first dot on a recording medium, and a scanning unit configured to move the recording unit in a scanning direction. A recording resolution of the second dot in the scanning direction is lower than a recording resolution of the first dot in the scanning direction.
摘要:
There is provided an inkjet printing apparatus which executes a proper recovery operation in accordance with the demounting time period of an ink tank and information of the ink tank. In the inkjet printing apparatus of this invention, the demounting time period and information of the ink tank are used as parameters for determining the condition of a recovery operation after the ink tank is once demounted and thereafter mounted again. Since recovery is done in consideration of the degrees of ink evaporation and an increase in viscosity, wasteful ink consumption can be suppressed while a necessary recovery operation is performed.
摘要:
A recording apparatus includes a recording unit configured to record a first dot and a second dot having a diameter smaller than that of the first dot on a recording medium, and a scanning unit configured to move the recording unit in a scanning direction. A recording resolution of the second dot in the scanning direction is lower than a recording resolution of the first dot in the scanning direction.
摘要:
A smooth, uniform image is produced by minimizing the occurrence of satellites of secondary color and dispersing landing positions of the satellites as uniformly as possible. For this purpose, the printing operation performed so that satellites of the two inks (cyan and magenta ink, foe example) ejected toward the same pixel are separated and landed on opposite sides of the main dots on the same pixel. This makes the distribution of satellites uniform and makes individual satellites less noticeable, maintaining the uniformity of an image.