Canon Kabushiki Kaisha

Ayako Uji

Noribumi Koitabashi

Yoshitomo Marumoto

Ryoki Jahana

Hiromitsu Yamaguchi

Hitoshi Tsuboi

Eri Noguchi

Takeshi Miyazaki

Daigoro Kanematsu

Yoshinori Nakajima

Yasunori Fujimoto

Yasushi Murayama

Ryota Kato

Eiji Komamiya

Yoshihisa Yamashita

When a feeding amount for multi-pass printing is changed, the purpose related to an image quality using a binary data generation pattern can still be attained by, for example, a density pattern method. Specifically, a multi-pass printing mode is identified, and a density pattern selection matrix associated with a cycle of binary data generation is selected in accordance with the selected printing mode. That is, a density pattern selection matrix employed for binary data generation using a density pattern is changed to a size corresponding to the feeding amount designated by the selected printing mode. Thereby, a phenomenon that a unit used for image processing to gain a predetermined purpose related to an image quality does not match a unit area used for a printing operation is avoided, and an image printing purpose using a binary data generation pattern can be appropriately attained.

Data generation and printing with binarization pattern selected as function of pixel number corresponding to conveying amount of print medium

The present invention is able to print high-grade images by reducing the adverse effect of misdirection of ink in the joining portion between adjacent nozzle lines. To achieve this, an ink jet print head includes a plurality of chips in each of which adjacent nozzle lines are formed. The relative positions of the chips are set depending on the amounts of misdirection of ink ejected from overlapping nozzles in the joining portion.

Ink jet print head, ink jet printing apparatus, and method for manufacturing ink jet print head

The printing elements of each printing element array are divided into blocks. A block to be driven and a block not to be driven are determined for each scanning of a printhead. The printhead is driven to print by complementing blocks to be driven by each scanning in a plurality of scanning operations. In each scanning, the printhead prints while making a printing area corresponding to at least one ink different from a printing area corresponding to another ink.

Inkjet printing apparatus and printing method therefor

A data processing apparatus uses a pattern table arranging binarizing patterns correspondingly to positions of a pixel, each of which is used for a binarization process in which an arrangement of a number of dots depending on a value of multi-valued image data corresponding to the pixel is determined, to select the binarizing pattern depending on the position of the pixel and on the value of multi-valued image data corresponding to the pixel for executing the binarization process. The pattern table corresponding to one of the values to be taken by the multi-valued image data includes a plurality of types of binarizing patterns which determine different arrangements of dots from each other. The arrangement of each of the plurality of types of binarizing patterns in the pattern table corresponding to the one value has a characteristic that the arrangement is aperiodic and that low frequency components are fewer than high frequency components.

Data processing apparatus and method of expanding dot arrangement patterns

In manufacturing a long ink jet print head in which a plurality of chips are arranged, a decrease in yield resulting from inappropriate arrangement of the chips can be suppressed and high-quality images can be printed. An image corresponding to the joining portion between adjacent chips is printed by using, as overlapping nozzles, those of the nozzles located in the joining portion which are selected on the basis of the amount of misalignment between chips.

Ink jet printing apparatus, ink jet print head, ink jet printing method, and method and program for setting print conditions

When an image is formed by imparting aqueous ink discharged from a recording head onto a recording medium P, water content contained in the aqueous ink is evaporated by a heater to suppress curl generated in the recording medium P after the image formation. The aqueous ink contains at least 15% by weight of curl control agent, and the viscosity of the aqueous ink is lower than 4 cp. The viscosity is increased to suppress the curl generation by evaporating the water content contained in the aqueous ink imparted on the recording medium P after the image formation.

Ink jet recording apparatus

The temperature of a recording head used for recording is adjusted by heating a recording head that is not used for recording and utilizing the effect of heat conduction. The adoption of such a configuration makes it possible to adjust the temperature of a recording head during recording by the use of a relatively simple temperature control circuit. Further, since temperature adjustment can be continuously and efficiently conducted, a good discharge condition can be achieved, and the speed of recording can be increased by reducing the number of recovery operations such as preliminary ejections.

Inkjet recording apparatus

An ink jet recording apparatus is provided that changes the adjustment temperature of a recording head depending on the number of recording media so that a favorable recording result can be maintained for any number of recording media and a time required for the recording can be reduced. Different adjustment temperatures Tare used depending on the number of recording media. When the number of recording media is relatively small, Tis determined to be low and, when the number of recording media is relatively large, then Tis determined to be high. When the recording is started, when the head temperature is lower than the determined temperature T, then ink is heated by a sub heater. Depending on the determined temperature, an interval with which a preliminary ejection is performed is changed.

Ink jet recording apparatus and ink jet recording method

An ink jet recording apparatus minimizing adhesion of ink mist to a recording medium due to electrostatic attraction of a belt conveying the recording medium. The apparatus includes a liquid applying device applying a processing liquid to a position on the recording medium corresponding to an attracting-force generating device provided on the conveying belt. The apparatus discharges the processing liquid to the position before the ink is discharged on the recording medium. Since moisture of the processing liquid reduces surface charges of the recording medium, the amount of ink mist adhering to the recording medium can be reduced.

An ink for use in ink jet recording which contains a dye and a pigment as colorants. The pigment is a self-dispersible pigment in which at least one anionic group is bonded directly or through another atomic group to a surface of the pigment, the dye is an anionic dye, 2-pyrrolidone is further contained in the ink as a solvent, and the mass-based content X of 2-pyrrolidone in the ink and the ratio Y of the pigment to the sum of the dye and the pigment satisfy the following formulas 1 to 3 at the same time:12&#x2266;X&#x3c;30&#x2003;&#x2003;formula 150&#x2266;Y&#x2266;75&#x2003;&#x2003;formula 2&#x2267;&#x2212;2+84&#x2003;&#x2003;formula 3.

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Tokyo, Japan

Ayako Uji