Abstract: A recording apparatus for recording an image on a recording medium by scanning the recording medium with a recording head for discharging ink includes a thinning unit configured to thin data for discharging ink by the recording head on a plurality of areas formed by dividing scanning regions including at least a first scanning region and a second scanning region to be recorded each by one scan of the recording head in the scan direction, and a recording head drive unit configured to discharge ink by driving the recording head based on data which has been thinned by the thinning unit, wherein a boundary between the areas in the first scanning region is located in a different position from that of a boundary between areas in the second scanning region, which is adjacent to the first scanning region, in the scan direction.

Abstract: In a printing apparatus and method, both high-speed and high-quality formation of images can be achieved. The apparatus has a full-line printhead that includes printhead chips. A plurality of printing element arrays are disposed in parallel on the same printhead chip, and a distribution ratio of print data is controlled so as to at least differ in an overlap area in which end portions of the printing element arrays overlap each other.

Abstract: A process for synthesizing an organic transition metal complex compound with an atom group having an electron-donor ability, in an industrially and economically advantageous manner, without a compound having a proton-donor ability being a metal salt, and a metathesis catalyst produced with the use of the above process, are provided. A process for producing an organic transition metal complex compound in which an atom group having an electron-withdrawing ability can be converted into an atom group having a stronger electron-donor ability, by contacting an compound having a proton-donor ability with the organic transition metal complex compound with an atom group having an electron-withdrawing ability, in the presence of an basic compound, and a metathesis catalyst of which the content of an alkali metal is reduced, and which is obtainable with the use of the above process, are provided.

Abstract: A spliced ink-jet head including head chips, each of which is capable of discharging inks of two or more colors, and which are spliced in a staggered manner which restrains the occurrence of splice streaks, white streaks caused by deflection at ends or uneven colors attributable to different landing orders of ink droplets in spliced portions of different colors when one-pass recording is carried out. The head chips is arranged such that, in a relationship between two adjoining head chips, at least one discharge port of one head chip and one discharge port of the other head chip for the same color tone ink in end portions overlap on a line in a recording material feeding direction, while discharge ports for different color tone inks do not overlap.

Abstract: An image data signal value conversion is performed such that the volume of ink applied to image areas on a print medium to be printed by the overlapping portions of the printing element substrates is smaller than that applied to image areas on the print medium to be printed by other than the overlapping portions. Alternatively, the image data signal value conversion is performed such that the volume of ink applied to overlapping areas on the print medium to be printed by two consecutive printing main scans is smaller than that applied to other than the overlapping areas. For this reason, even when forming photographic images by using an elongate “joining head”, high-quality images with no density unevenness between overlapping areas and other areas on a print medium can be produced. Also in a serial type printing apparatus, uniform images with no seam stripes can be produced.

Abstract: An ink jet printing apparatus and an ink jet printing method are provided which use a printing head having a plurality of ejection opening arrays and enable high quality printing without causing uneven density in a conveying direction. For this purpose, by providing a plurality of ejection opening arrays to chips constituting the printing head and changing data assigning ratio of each ejection opening array, deviation in impact positions depending on the distance between the ejection opening arrays becomes inconspicuous.

Abstract: An ink jet printing apparatus and an ink jet printing method which enable a high quality printing without causing uneven thickness in a conveying direction using a printing head having a plurality of ejection port arrays are provided. To this end, the printing is performed by making distribution ratios of printing in each ejection port array in the printing head different from one another according to gradation.

Abstract: An inkjet printing apparatus which performs time-divisional driving poses the following problem for at least some gray levels when halftoning control by the unit matrix is performed. More specifically, the shape of a dot cluster in each unit matrix periodically changes due to the mismatch between the unit matrix size and the unit section size of time-divisional driving. For this reason, periodical density unevenness is generated and appears as degradation of the image quality. In order to prevent degradation of the image quality, according to this invention, image data is shifted in accordance with the unit section of time-divisional driving, or the discharge timing of ink from a printhead is shifted.

Abstract: The invention discloses a printing apparatus and method whereby it is possible to achieve both high-speed and high-quality formation of images. The apparatus has a full-line printhead that includes printhead chips. A plurality of printing element arrays are disposed in parallel on the same printhead chip, and a distribution ratio of print data is controlled so as to at least differ in an overlap area in which end portions of the printing element arrays overlap each other.

Abstract: In an inkjet printing apparatus which generates satellites droplets, problems in an image attributable to the satellites are mitigated as far as possible. For this purpose, each parameter is adjusted to satisfy a relationship such that the distance between positions of placement of a main droplet and a satellite substantially agrees with an integral multiple of the width of an index pattern. As a result, a satellite is likely to be placed in a position overlapping a dot formed by a main droplet printed in the same area of a pixel located in the vicinity of the satellite, which prevents satellites from placement blank positions where no dot should be printed. Thus, the influence of satellites is mitigated, and problems in an image attributable to satellite are reduced.

Abstract: There is provided an ink jet printing apparatus capable of printing an image having few joining stripes. Dot count is performed regarding an image printed in the vicinity of the joining stripe, and print duty is judged. Next, a dot count value is determined from the print duty. Then, a print data correction rank is determined beforehand in accordance with properties of the printing apparatus, and image data to be printed in the vicinity of the joining stripe is added or thinned out. Thus, an image can be printed which has few black and white stripes.

Abstract: In an ink jet printing apparatus in which satellites are produced, it is an object to minimize image impairments caused by the satellites in a variety of print modes. To this end, index patterns are prepared which have different sizes for different print modes. This enables satellites to land at print positions of main dots in other pixels in any of the print modes that have different distances between main dots and satellites. It is therefore possible to minimize image impairments caused by the satellites and to output a crisp image.

Abstract: In an ink jet printing apparatus in which satellites are produced, it is an object to minimize image impairments caused by the satellites in a variety of print modes. To this end, index patterns are prepared which have different sizes for different print modes. This enables satellites to land at print positions of main dots in other pixels in any of the print modes that have different distances between main dots and satellites. It is therefore possible to minimize image impairments caused by the satellites and to output a crisp image.

Abstract: In an inkjet printing apparatus which generates satellites droplets, problems in an image attributable to the satellites are mitigated as far as possible. For this purpose, each parameter is adjusted to satisfy a relationship such that the distance between positions of placement of a main droplet and a satellite substantially agrees with an integral multiple of the width of an index pattern. As a result, a satellite is likely to be placed in a position overlapping a dot formed by a main droplet printed in the same area of a pixel located in the vicinity of the satellite, which prevents satellites from placement blank positions where no dot should be printed. Thus, the influence of satellites is mitigated, and problems in an image attributable to satellite are reduced.

Abstract: An inkjet printing apparatus which performs time-divisional driving poses the following problem when halftoning control by the unit matrix is performed for at least some gray levels. More specifically, the shape of a dot cluster in each unit matrix periodically changes owing to the mismatch between the unit matrix size and the unit section size of time-divisional driving. The periodical change stands out as periodical density unevenness to the eye, degrading the image quality. In order to solve this problem, according to this invention, the unit matrix size and the unit section size of time-divisional driving are determined so that unit matrices have the same shape. More specifically, the unit section size of time-divisional driving and the unit matrix size in the nozzle array direction are set to (unit section size of time-divisional driving)×n=(unit matrix size in nozzle array direction) (n is a natural number).

Abstract: An inkjet printing apparatus which performs time-divisional driving poses the following problem for at least some gray levels when halftoning control by the unit matrix is performed. More specifically, the shape of a dot cluster in each unit matrix periodically changes due to the mismatch between the unit matrix size and the unit section size of time-divisional driving. For this reason, periodical density unevenness is generated and appears as degradation of the image quality. In order to prevent degradation of the image quality, according to this invention, image data is shifted in accordance with the unit section of time-divisional driving, or the discharge timing of ink from a printhead is shifted.

Abstract: In a multipass printing system, this invention prints a quality image even when the number of passes is reduced to increase a printing speed. For this purpose, in a multipass printing system which repetitively alternates a printing scan, which causes the print head to eject ink from the nozzles as it moves in the main scan direction, and a feeding operation, which feeds a print medium in a sub-scan direction, this invention sets the feed distance of the print medium according to a density of an image being printed on the print medium.

Abstract: A spliced ink-jet head including head chips, each of which is capable of discharging inks of two or more colors, and which are spliced in a staggered manner which restrains the occurrence of splice streaks, white streaks caused by deflection at ends or uneven colors attributable to different landing orders of ink droplets in spliced portions of different colors when one-pass recording is carried out. The head chips is arranged such that, in a relationship between two adjoining head chips, at least one discharge port of one head chip and one discharge port of the other head chip for the same color tone ink in end portions overlap on a line in a recording material feeding direction, while discharge ports for different color tone inks do not overlap.

Abstract: The present invention is to provide a fluorine-containing polymer having excellent light transmission in the vacuum ultraviolet region of not more than 193 nm, a monomer favorably used for preparing the fluorine-containing polymer, a process for preparing the fluorine-containing polymer, and uses of the fluorine-containing polymer. The fluorine-containing polymer has at least a repeated unit structure represented by the following formula (1) and has an absorption coefficient of not more than 3.0 ?m?1 at 157 nm of ultraviolet rays. wherein R1 to R12 are each fluorine, a fluorine-containing alkyl group of 1 to 20 carbon atoms, or the like; X1 is —CRaRb—, —NRa— or —PRa— (Ra and Rb are each fluorine, a fluorine-containing alkyl group of 1 to 20 carbon atoms, hydrogen, —O—, —S—, an alkyl group of 1 to 20 carbon atoms, or the like); at least one of R1 to R12 and X1 is fluorine or a fluorine-containing group; and n is 0 or an integer of 1 to 3.

Abstract: A hydrogenated ring-opening metathesis polymer which contains at least a structural unit [B] of the following general formula [3] and/or a structural unit [C] of the following general formula [4]: wherein, R8 to R11 and R13 to R16 each independently represent a hydrogen atom or a linear, branched or cyclic alkyl group having 1 to 10 carbon atoms, and X2s and X3s are the same or different and represent —O— or —CR122— wherein, R12 represents a hydrogen atom or a linear or branched alkyl group having 1 to 10 carbon atoms). One of Y1 and Y2 represents —(C═O)— and the other of Y1 and Y2 represents —CR182— wherein, R18 represents a hydrogen atom or a linear or branched alkyl group having 1 to 10 carbon atoms and m and n represent an integer of 0 or 1 to 3.