Canon Kabushiki Kaisha

Hidehiko Kanda

Jiro Moriyama

Toshiyuki Chikuma

Atsushi Sakamoto

Norihiro Kawatoko

Yuji Hamasaki

Hirokazu Tanaka

Daigoro Kanematsu

Osamu Iwasaki

Masashi Hayashi

Aya Hayashi

Kentaro Yano

Kiichiro Takahashi

Toshio Kashino

Hitoshi Nishikori

Takeshi Yazawa

Yuji Akiyama

Yoshinori Nakajima

Hiromitsu Hirabayashi

Yoshinori Nakagawa

Fumihiro Gotoh

Hitoshi Sugimoto

Miyuki Matsubara

Hisao Yaegashi

Wakako Yamamoto

Keiji Kuriyama

Hiroshi Tajika

Naoji Otsuka

Hirokazu Yoshikawa

Masahiko Kubota

Teruo Ozaki

Atsushi Arai

Koromo Shirota

Isao Ebisawa

Ryuji Katsuragi

Atsuhiko Masuyama

Toshiharu Inui

Hideaki Takamiya

Susumu Hirosawa

Masahiko Umezawa

Akihiro Tomida

Kenichi Oonuki

Noribumi Koitabashi

Masaya Uetsuki

Yoshie Asakawa

Takayuki Ushiyama

Naoji Ohtsuka

Aya Sugimoto

Masao Kato

Yutaka Kano

Shingo Nishioka

Hajime Nagai

Minoru Teshigawara

Yoshinori Misumi

Satoshi Wada

Hiroshi Taira

Kentarou Muro

Masaya Uetuki

Eiji Komamiya

Naomi Yamamoto

Ayako Ohta

Akitoshi Yamada

Hiroyuki Ishinaga

Yoshiyuki Imanaka

Ichiro Saito

Mitsuhiro Ono

Shigeyasu Nagoshi

Yuji Konno

Hiroyuki Tanaka

Takaaki Yamaguchi

Nobuyuki Matsumoto

Akiko Maru

Takeshi Okazaki

Miyuki Fujita

Hitoshi Tsuboi

Muga Mochizuki

Junichi Saito

Shingo Nagata

Shinya Matsui

Souhei Tanaka

Tetsuya Kawanabe

Tetsuya Saito

Takumi Kaneko

Akira Kuronuma

Takeji Niikura

Takeaki Nakano

Kei Yoshizawa

Hisatsugu Naito

Serena Yoshikawa

Monta Matsui

Akiko Aichi

Nobuo Ohnuma

Tetsurou Inoue

Rumi Akiyama

Yasutoshi Saito

A printing apparatus includes a printing unit to apply ink containing a coloring material, and a reactive liquid that reacts with the ink, to a printing medium, a reading unit to read an ink image on the printing medium, and a printing control unit to cause the printing unit to print a plurality of ink images different in application amount of the reactive liquid on the printing medium. In addition, a determination unit determines an application amount of the reactive liquid in printing using a predetermined type of printing medium, based on a ratio of a plurality of reading results obtained by the reading unit by reading the plurality of ink images printed on the predetermined type of printing medium.

Printing apparatus applying ink containing a coloring material and a reactive liquid, control method, and storage medium

A technique capable of obtaining the displacement amount of the ejection position of a reaction liquid without changing a test pattern according to the configuration of the ejection head is to be provided. A test pattern including a detection pattern, which extends in a predetermined direction and in which, if divided into two, at least two inks and the reaction liquid are ejected to one area and only the at least two inks or the at least two inks and the reaction liquid of an amount that is smaller than that of the reaction liquid ejected to the one area are ejected to the other area, is printed, and the optical characteristics of the printed detection pattern are obtained. Further, based on the obtained optical characteristics of the detection pattern, the displacement amount of the ejection position of the reaction liquid in the predetermined direction is obtained.

Printing apparatus, printing method, and storage medium

An image processing apparatus includes an acquisition unit that acquires N-valued image data corresponding to an image including at least one object, and edge data indicating an edge area of the object, an image processing unit that generates M-valued (N>M≥2) quantized data where each of a plurality of pixels is associated with one of a value indicating that no dot is to be recorded and a value indicating that a dot is to be recorded, based on the acquired image data, using an image processing parameter, and a changing unit that changes at least one pixel among pixels that indicate the edge area of the object in the edge data and have the value indicating that no dot is to be recorded in the quantized data so that the at least one pixel has the value indicating that the dot is to be recorded.

Image processing apparatus, image processing method, and storage medium for improving the quality of printed edges

An inkjet printing apparatus includes a printhead in which a plurality of ejection ports that eject ink are formed, a carriage mounted with the printhead and reciprocated in a predetermined direction, a conveyance unit to convey a print medium, a platen to support, at a printing position, the conveyed print medium, and an obtaining unit to obtain information regarding a distance from an ejection port surface of the printhead to the print medium at positions in the predetermined direction. The apparatus controls an ink ejection timing in accordance with the information regarding the obtained distance and information corresponding to the number of passes of printing, which is the number of times of moving the carriage to print the image in a unit area of the print medium.

Inkjet printing apparatus and control method thereof

A plurality of test patterns are printed with different print conditions, the test patterns each being formed by two inks out of a plurality of inks and a reaction liquid and including a plurality of patterns among which ejection positions of the reaction liquid relative to ejection positions of the two inks are displaced by a predetermined amount at a time. The optical properties of the respective test patterns printed on the print medium are detected. A displacement amount of the relative ejection positions of the reaction liquid from the ejection positions of the plurality of inks is obtained based on the optical property of the test pattern in which an optical density difference between the patterns in the test pattern is greater than a predetermined value and which has an optical density of a lowest level among the optical properties of the test patterns detected.

Printing apparatus and method for controlling the same

A print position adjustment mode is performed with high accuracy while consumption of print media is saved. An inkjet printing apparatus prints an adjustment pattern including multiple patches for adjusting print positions of dots by a print head on a print medium. Patches set next to each other in a scanning direction are printed above platen ribs at intervals based on rib pitches at which the platen ribs are arranged.

Inkjet printing apparatus and printing method using adjustment pattern

A printing apparatus provides a conveyance operation in which a conveyance unit conveys a print medium in a conveyance direction, and includes a control unit to control a printing unit such that, in a case where an image is to be printed onto a print medium of a first type in a first state in which the print medium of the first type is supported by a first conveyance member and not supported by a second conveyance member, the printing unit uses a printing element included in a first region from which a distance to the print medium of the first type in a height direction perpendicular to a surface where the printing elements are arrayed is a first distance, and does not use a printing element included in a second region from which a distance to the print medium of the first type in the height direction is a second distance greater than the first distance.

Printing apparatus and control method

There is a case where a reading unit cannot read an entire area of a recording medium in a scanning direction of a carriage, or a case where reading accuracy is low in the entire area. In such a case, a result of reading a test pattern for adjusting an ejection timing at each position cannot be obtained with high accuracy in a single reading operation. In order to solve the issue, a recording apparatus performs a reading operation a plurality of times and generates, based on results from the respective operations, an adjustment value for adjusting the ejection timing at each position in the scanning direction.

Recording apparatus, control method, and storage medium

According to an embodiment of the present disclosure, there is provided a recording apparatus, wherein a quantization pattern is applied to a unit area in an end part area located at a boundary with a central area while being offset so as to correspond to an end part of the quantization pattern.

Recording apparatus and recording method

With respect to an area quantized by using an area of part in a quantization pattern and also without using an area of the other part in the quantization pattern in quantized data, a mask pattern part corresponding to the area of the part among mask pattern parts constituted by dividing a mask pattern is applied.

Image processing apparatus and image processing method

An embodiment of this invention implements both suppression of occurrence of a print failure, and suppression of wasteful ink consumption along with bubble exhaust. Bubble sucking is performed as follows in a printing apparatus including a printhead in which a plurality of orifices are provided for discharging ink, an ink tank for supplying ink to the printhead through an ink channel, and a suction unit configured to suck ink from the orifices. A bubble is injected to the ink channel by using, for example, a pump and hollow needle. After injecting the bubble to the ink channel, the suction unit is operated to suck the injected bubble from the orifices.

Printing apparatus and bubble exhaust method therefor

When the head temperature Tfinish, which is the head temperature at the time of completion of a preceding scan, is higher than the stable ejection temperature Tstable, the target temperature is made a temperature that is only a temperature value &#x394;T lower than the head temperature Tfinish. On the other hand, when Tfinish, the head temperature at the time of print completion, is lower than the stable ejection temperature Tstable, the target temperature is made a temperature that is only a temperature value &#x394;T higher than the head temperature Tfinish. Because of this it is possible to inhibit head temperature rise in the case where an image with a high print density is printed.

Ink jet printing apparatus and print head temperature control method

An ink-jet recording device is capable of correcting a recording position due to a leaning of a printing head and correcting of driving timing between multiple printing heads. Each nozzle row of a printing head is classified into multiple nozzle groups, and the driving timing of the nozzle groups other than the nozzle group serving as a reference of correction of the multiple nozzle groups is adjustable to correct for any leaning of the printing head. Moreover, in the event of performing the driving timing between printing heads, the driving timing of a non-reference printing head is adjustable relative to a reference printing head employed for leaning correction of multiple printing heads.

Ink-jet recording device and ink-jet recording control method

The invention provides a printing apparatus and a recovery method therefore which can minimize ink consumption in a recovery process for a print head of the apparatus. The invention has a control unit to cause a print head to eject ink from nozzles arrayed on the print head so as to recover ink ejecting function of the nozzles, and a specification unit to specify a set print mode selected from among a plurality of print modes. The print modes define number and position of nozzles in use for printing an image. The control unit executes a first preliminary ejection process before or after printing an image on a print medium. The first preliminary ejection process has selectively ejecting ink from both of the nozzles in use selected by the currently set print mode and the unused nozzles in the vicinity of the nozzles in use.

Ink jet printing apparatus and recovery method for a print head thereof

A recording apparatus to record an image to a recording medium includes a recording head having nozzles arranged in a predetermined direction in a nozzle array, scanning, recording control, obtaining, determining, and adjusting units. The scanning unit scans the recording head to the recording medium in a crossing direction. The recording control unit causes the recording head to record an adjusting pattern and a detecting pattern by discharging ink from a nozzle group. The obtaining unit obtains an information regarding number of defective discharge nozzles in the nozzle group based on the detecting pattern. The determining unit determines an adjusting value based on the recorded adjusting pattern where the indicated number is smaller than a threshold value, and not based on the adjusting pattern where the indicated number is larger than the threshold value. The adjusting unit adjusts the recording head recording position based on the determined adjusting value.

Recording apparatus and pattern forming method

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Yokohama, Japan

Hidehiko Kanda