Abstract: Recording is performs that suppresses ink discharge position deviation between scans while suppressing graininess in a case of using multiple types of ink.

Abstract: The driving order of driving blocks is controlled so that ink landing positions from driving blocks differ from each other in multiple scans. Recording data is generated so that, of pixels where ink is discharged in one scan, the number of pixels adjacent at both sides in the scanning direction to pixels where ink is discharged in another scan is greater than the number of pixels not adjacent at both sides in the scanning direction to pixels where ink is discharged the other scan.

Abstract: An image printing apparatus can print an image in which graininess is suppressed while using a color material of light blue. To achieve this, the color material of light blue satisfies the following condition. ?LB?(?LC??LB)>0 and ?LB?(?LM??LB)>0 Here, ?LC represents a difference in lightness between cyan ink and a blank area, ?LM represents a difference in lightness between magenta ink and the blank area, and ?LB represents a difference in lightness between light blue ink and the blank area. Further, the color material of light blue satisfies the following condition. hC+(h(C+M)?hC)/2?hB?hM?(hM?h(C+M))/2 Here, hC represents a hue of the cyan ink, hM represents a hue of the magenta ink, h(C+M) represents a hue of the image printed with the cyan ink and the magenta ink in the same amount, and hB represents a hue of the light blue ink.

Abstract: A printing apparatus comprising a printhead including two nozzle arrays neighboring in a first direction, each including nozzles arrayed along a second direction, a conveying unit for conveying a sheet in the first direction, a driving unit for driving the printhead so that each nozzle performs preliminary discharge on the sheet, and a unit configured to perform selecting some nozzles as non-driving nozzles and the remaining nozzles as driving nozzles for every column data in image data, determining image data to be assigned to each array as a first data so that a dot corresponding the non-driving nozzle in one of the two arrays is printed by the driving nozzle in the other, determining data for preliminary discharge as a second data so that each driving nozzle performs preliminary discharge, and ORing the first and second data.

Abstract: If a plurality of ejection openings at identical positions in an array direction in which ejection openings are arrayed have experienced an ejection failure, complementary nozzles are selected so that the distance between ejection openings at both ends of the plurality of ejection openings in a cross direction crossing the array direction is the shortest.

Abstract: If a plurality of ejection openings at identical positions in an array direction in which ejection openings are arrayed have experienced an ejection failure, complementary nozzles are selected so that the distance between ejection openings at both ends of the plurality of ejection openings in a cross direction crossing the array direction is the shortest.

Abstract: A printing apparatus comprising a printhead including two nozzle arrays neighboring in a first direction, each including nozzles arrayed along a second direction, a conveying unit for conveying a sheet in the first direction, a driving unit for driving the printhead so that each nozzle performs preliminary discharge on the sheet, and a unit configured to perform selecting some nozzles as non-driving nozzles and the remaining nozzles as driving nozzles for every column data in image data, determining image data to be assigned to each array as a first data so that a dot corresponding the non-driving nozzle in one of the two arrays is printed by the driving nozzle in the other, determining data for preliminary discharge as a second data so that each driving nozzle performs preliminary discharge, and ORing the first and second data.

Abstract: A printing apparatus comprising a printhead including two nozzle arrays neighboring in a first direction, each array including nozzles arrayed in a second direction, a determining unit for determining discharge nozzles and non-discharge nozzles for each array, a conveying unit for conveying a sheet to the first direction, a unit configured to perform (a) determining printing data such that dots corresponding to the non-discharge nozzles in one array are printed by the discharge nozzles in another array, (b) inserting null data into the printing data based on a shift amount of between printing positions of the two nozzle array, and (c) newly determining discharge nozzles and non-discharge nozzles by the determining unit based on the printing data including the null data.

Abstract: A printing apparatus including a printhead and a print control unit, wherein the printhead includes two nozzle arrays, each arranged in a first direction and including nozzles arranged along a second direction, the print control unit performs a first operation of expanding print data onto a memory, a second operation of selecting, for each nozzle array, some of the nozzles as non-driving nozzles and the remaining nozzles as driving nozzles, and a third operation of distributing the expanded print data to the two nozzle arrays such that dots corresponding to the non-driving nozzles of one nozzle array are printed by the driving nozzles of the other nozzle array.

Abstract: Provided is a dental syringe that enables easy discharge of air within a syringe body 1 to the exterior while injecting dental material into the syringe body 1 from a discharge port 1a of the syringe body 1 and easy discharge of the dental material that has been injected into the syringe body 1 during use for treatment. A dental syringe includes a syringe body 1, a plunger 2, and an O-ring 3 to be mounted in an engagement groove 2a formed along a circumferential direction of a front end portion of the plunger 2. The engagement groove 2a includes a shallow groove 2aa at the front end side and a deep groove 2ab at the rear end side.

Abstract: A printing apparatus, comprising a driving unit for driving a printhead including a plurality of nozzles each of which prints a dot, a conveying unit for conveying a printing medium, a memory and a unit, wherein the plurality of nozzles are arranged to form nozzle arrays adjacent to each other, the unit performs a first operation for developing printing data column by column on the memory, a second operation for assigning the printing data to each nozzle array, and a third operation for controlling the driving unit based on the assigned printing data, and, after the first operation and before the second operation, the unit specifies a portion of the printing data corresponding to a dot deviated from a correct printing region due to a tilt of the nozzle arrays and rearranges the portion.

Abstract: A printing apparatus including a print head including nozzle groups each having nozzles, each of the nozzle groups applying ink having a plurality of volumes from the nozzles to form dots including dots differing in size, including: an arrangement determination unit to determine an arrangement of dots to be formed by each of the nozzle groups; a size determination unit to determine sizes of ink ejected to print the dots determined by the arrangement determination unit, according to respective ejection characteristics of the nozzle groups, such that a print characteristic of an image based on the dot arrangement determined by the arrangement determination unit is within a predetermined range; and an ejection control unit to control the print head to eject ink having the plurality of sizes determined by the size determination unit in positions of a print medium based on the arrangement determined by the arrangement determination unit.

Abstract: A printing apparatus, comprising a driving unit for driving a printhead including a plurality of nozzles each of which prints a dot, a conveying unit for conveying a printing medium, a memory and a unit, wherein the plurality of nozzles are arranged to form nozzle arrays adjacent to each other, the unit performs a first operation for developing printing data column by column on the memory, a second operation for assigning the printing data to each nozzle array, and a third operation for controlling the driving unit based on the assigned printing data, and, after the first operation and before the second operation, the unit specifies a portion of the printing data corresponding to a dot deviated from a correct printing region due to a tilt of the nozzle arrays and rearranges the portion.

Abstract: An image processing apparatus for generating dot data to form an image by forming dots on a recording medium includes a receiving unit, a first, second, and third generating unit, and a correcting unit. The receiving unit receives first and second image data included in image data. The first generating unit generates, per the first image data, first ink color data representing a multi-valued signal value corresponding to an ink color. The second generating unit generates, per the second image data, second ink color data representing a multi-valued signal value corresponding to an ink color. The correcting unit corrects the signal value represented by the generated first and second ink color data. The third generating unit generates, per the first and second ink color data of which the signal values have been corrected, the dot data representing existence of formation of dots to form an image.

Abstract: Adequate correction processing is performed on image data based on the degree of ink concentration that occurs even. An image processing apparatus having: acquisition unit for acquiring multi-value image data and a first parameter related to the degree of concentration of ink; first generation unit for generating corrected data by correcting the multi-value data that is to be printed for the first pixel based on the multi-value data that is to printed in the first pixel and a first parameter; and second generation unit for generating the first parameter and a second parameter that indicates the degree of ink concentration of the plurality of nozzles when printing a second pixel that is printed by the nozzles next to the first pixel.

Abstract: Provided are an inkjet printing apparatus and inkjet printing method that can, regardless of an ejection frequency of a print head, stabilize density of an image expressed on a print medium. For this purpose, an ink concentration integrated value is obtained according to the ejection history of each nozzle so as to be increased by data indicating non-ejection of the nozzle or decreased by data indicating ejection. Then, image data on the target pixel is corrected such that density of the target pixel is further reduced as the pixel is subjected to printing by a nozzle having a higher ink concentration integrated value.

Abstract: A printing device using a print head ejecting ink from a plurality of nozzles to print ink dots of a plurality of dot diameters, includes a print-characteristic acquisition unit obtaining print characteristic information on dot diameters of ink dots to be printed per each predetermined portion of the plurality of nozzles, a distribution ratio determination unit determining a distribution ratio for distributing image data to the predetermined portions of the plurality of nozzles based on the information, a dot print position determination unit quantizing the image data to determine a dot print position based on the image data and sizes and an array of thresholds; and a plurality of masks based on dot distribution order determined according to the distribution ratio, distributing printing of each of the ink dots of the plurality of dot diameters to the dot print position determined by the dot print position determination unit.

Abstract: An ink jet printing apparatus comprises a distributing unit configured to distribute print data for printing dot into data used for printing by first printing elements provided in a print head and data used for printing by second printing elements provided in the same print head, and a determining unit configured to, for the data used for printing by the respective parts of the printing element arrays of each of first and second print heads which have the overlapped print regions, determine a ratio between amount of the data used for printing by a combination of the first and second printing element arrays in the first print head and a combination of the first and second printing element arrays in the second print head.

Abstract: A printing apparatus including a print head including nozzle groups each having nozzles, each of the nozzle groups applying ink having a plurality of volumes from the nozzles to form dots including dots differing in size, including: an arrangement determination unit to determine an arrangement of dots to be formed by each of the nozzle groups; a size determination unit to determine sizes of ink ejected to print the dots determined by the arrangement determination unit, according to respective ejection characteristics of the nozzle groups, such that a print characteristic of an image based on the dot arrangement determined by the arrangement determination unit is within a predetermined range; and an ejection control unit to control the print head to eject ink having the plurality of sizes determined by the size determination unit in positions of a print medium based on the arrangement determined by the arrangement determination unit.

Abstract: An image processing apparatus for generating dot data to form an image by forming dots on a recording medium includes a receiving unit, a first, second, and third generating unit, and a correcting unit. The receiving unit receives first and second image data included in image data. The first generating unit generates, per the first image data, first ink color data representing a multi-valued signal value corresponding to an ink color. The second generating unit generates, per the second image data, second ink color data representing a multi-valued signal value corresponding to an ink color. The correcting unit corrects the signal value represented by the generated first and second ink color data. The third generating unit generates, per the first and second ink color data of which the signal values have been corrected, the dot data representing existence of formation of dots to form an image.