Canon Kabushiki Kaisha

Kiichiro Takahashi

Osamu Iwasaki

Naoji Otsuka

Minoru Teshigawara

Kentaro Yano

Hitoshi Nishikori

Tetsuya Edamura

Daigoro Kanematsu

Toshiyuki Chikuma

Hitoshi Sugimoto

Atsushi Arai

Akiko Maru

Takatoshi Nakano

Satoshi Seki

Yoshiaki Murayama

Jiro Moriyama

Toshiharu Inui

Hiromitsu Hirabayashi

Hiroshi Taira

Naoji Ohtsuka

Hirokazu Tanaka

Miyuki Matsubara

Hiroshi Tajika

Shigeyasu Nagoshi

Hidehiko Kanda

Takeshi Yazawa

Fumihiro Gotoh

Naomi Oshio

Yoshinori Nakagawa

Nobuyuki Kuwabara

Hisao Yaegashi

Isao Ebisawa

Tsukasa Doi

Masao Kato

Yuji Akiyama

Fumiko Suzuki

Minako Kato

Mayuko Yamagata

Gou Sasaki

Yutaka Kurabayashi

Kazuhiro Nakata

Wakako Yamamoto

Tetsuo Suzuki

Masahiro Taniguro

Wakako Tanaka

Hiroyuki Saito

Takashi Nojima

Haruyuki Yanagi

Soichi Hiramatsu

Masaya Uetsuki

Hiroyuki Kinoshita

Mitsuhiro Ono

Yuji Konno

Hirokazu Yoshikawa

Masami Ikeda

Noribumi Koitabashi

Norihiro Kawatoko

Makoto Torigoe

Tsutomu Takahashi

Satoshi Kimura

Mamoru Sakaki

Genji Inada

Takuya Fukasawa

Katsuyuki Yokoi

Daisaku Ide

Tetsuhiro Nitta

Hideaki Kawakami

Masahiko Umezawa

Takayuki Murata

Satoshi Saikawa

Shinsuke Ikegami

Kenichi Oonuki

Toshiyuki Onishi

Kaneji Yamada

Masao Sasaki

Hideaki Takamiya

Tetsuyo Ohashi

Tadashi Hanabusa

Tsuneki Inuzuka

Masashi Hayashi

Koichi Tanno

Hiroshi Yoshino

Takashi Kasahara

Kazuyoshi Sumiuchi

Masaya Uetuki

Junichi Yoshikawa

Yoji Ara

Takatoshi Ohta

Yoshiyuki Honda

Masahiro Nagatani

Nobuhiro Kitabatake

Shigeaki Tanaka

Yusuke Komano

Naoiji Otsuka

Minoru Teshikawara

Tetyuya Edamura

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.&#x394;&#x2265;(&#x394;)&#x3e;0 and&#x394;&#x2265;(&#x394;)&#x3e;0Here, &#x394;Lrepresents a difference in lightness between cyan ink and a blank area, &#x394;Lrepresents a difference in lightness between magenta ink and the blank area, and &#x394;Lrepresents a difference in lightness between light blue ink and the blank area. Further, the color material of light blue satisfies the following condition.+()/2&#x2264;&#x2212;()/2Here, hrepresents a hue of the cyan ink, hrepresents a hue of the magenta ink, hrepresents a hue of the image printed with the cyan ink and the magenta ink in the same amount, and hrepresents a hue of the light blue ink.

Image printing apparatus and image printing method

Driving orders of driving blocks are controlled with regard to each of multiple types of ink so that landing positions of ink from the driving blocks differ in multiple scans, and in the mask patterns used, there is a relatively small number of superimposed pixels among pixels regarding which a large number of discharge permitted has been stipulated regarding a mask pattern corresponding to one type of ink and one scan and pixels regarding which a large number of discharge permitted has been stipulated regarding a mask pattern corresponding to another type of ink and the one scan.

Recording apparatus and recording method

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.&#x394;&#x2267;(&#x394;)&#x3e;0 and&#x394;&#x2267;(&#x394;)&#x3e;0Here, &#x394;Lrepresents a difference in lightness between cyan ink and a blank area, &#x394;Lrepresents a difference in lightness between magenta ink and the blank area, and &#x394;Lrepresents a difference in lightness between light blue ink and the blank area. Further, the color material of light blue satisfies the following condition.+()/2&#x2266;&#x2212;()/2Here, hrepresents a hue of the cyan ink, hrepresents a hue of the magenta ink, hrepresents a hue of the image printed with the cyan ink and the magenta ink in the same amount, and hrepresents a hue of the light blue ink.

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

Recording apparatus for reducing discharge position deviation of discharged ink, and recording method for the same

A recording apparatus includes a recording head including a plurality of recording elements arranged in a predetermined direction, and a determination unit configured to determine a first mode in which a specified image is recorded or a second mode in which a pattern is recorded in each of recording scannings in forward and backward directions to form an adjustment pattern for adjusting a recording position in the intersecting direction of the recording head, and the recording position of the recording head in accordance with the formed adjustment pattern is adjusted, in which a driving unit controls driving of the recording elements in a manner that a correspondence relationship between positions in the predetermined direction and the intersecting direction among a plurality of dots that form the same column is varied or is the same in the recording scannings in the forward and backward directions in accordance with the determined mode.

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.

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.

Image processing apparatus, image processing method, and image recording apparatus

The ink jet printing apparatus, wherein, to print images on a printing medium, a plurality of print heads, each of which includes an ejection port array provided by arranging multiple ink ejection ports in a widthwise direction of the printing medium, are arranged in a conveying direction of the printing medium, including: a unit for detecting a printing position displacement with respect to a printing position of a reference print head on the printing medium for each of remaining print heads excluding the reference print head which is one of the plurality of print heads; and a unit for adding non-image data corresponding to the printing position displacement to print data to be printed by the plurality of print heads, so as to align the printing positions of the plurality of print heads.

Ink jet printing apparatus and control method thereof

This invention relates to suppression of density unevenness caused by occurrence of ink-landing position shifts between print scans. In an embodiment, upon printing by scanning an inkjet printhead including printing elements, the following control is executed. That is, in order to form an image by print scans of the printhead on a single print area on a print medium, image data are acquired in correspondence with the respective scans. Also, the printing elements are partitioned into plural groups each including continuously arrayed printing elements, and the printing elements in each of the plural groups are time-divisionally driven based on drive sequences. Then, the drive sequences upon time-divisional driving in respective scans are set to include elements having the same drive timings and those having different drive timings.

Printing apparatus and printing control method thereof

The present invention provides an ink jet printing apparatus and an ink jet printing method which are based on the multi-pass printing method using a print head having a plurality of nozzle rows and which enables a reduction in the number of nozzles to be simultaneously driven, allowing ink to be stably ejected. On the basis of the multi-pass printing method of dividing print data into a plurality of pieces by using mask patterns, the mask patterns are offset according to the positional relationship between the plurality of nozzle rows in the print head.

Ink jet printing apparatus and ink jet printing method

A recording apparatus includes: a recording head having a recording element row in which multiple recording elements are disposed, with recording elements at dispersed positions in the recording element rows as blocks; a scanning unit configured to scan the recording head in a main scanning direction; a time-division driving unit configured to drive the recording elements in increments of blocks; a storing unit configured to store recording data; an obtaining unit configured to obtain information relating to the inclination of the recording element row relative to the main scanning direction; and a changing unit operable to change, in increments of individual recording elements, the storage position in the main scanning direction of recording data stored in the storing unit that is to be provided to recording elements of a group, which is configured of consecutive recording elements in each block in the recording element row, based on the obtained information.

Recording apparatus

Textures in a printed image are reduced with a configuration that, provided that a matrix made up of a plurality of dot arrangement patterns is treated as a unit, binarizes image data is repeatedly applying such a matrix to the image data. Specifically, when a shift value K=k, a shift process calculates X+kY for the position (X, Y) of each cell in a 4&#xd7;4 base matrix. The dot arrangement patterns are then shifted overall such that the cell where the value is k from among these values moves to the position (0, 0). The shift process is conducted while setting different shift values for every repeated use of the base matrix. As a result, regular textures are decreased in the case of using a base matrix made up of a gradation value Lv1 on a pixel area.

Data processing apparatus and print data generating method

In an ink jet printing apparatus and control method using a plurality of parts of a printing unit, ink ejection can be immediately started. First and second heating units heat first and second parts of the printing unit. Each of the first and second heating units performs heating when the temperature of each of the first and second parts of the printing unit is lower than a reference temperature, and stops heating when the temperature of each of the first and second parts of the printing unit is at least equal to the reference temperature. A control unit controls ejecting of ink from the printing unit such that the printing unit starts ejecting ink according to both first and second information, the first and second information indicating that the temperature of the first and second parts of the printing unit once reached the reference temperature under certain circumstances.

Ink jet printing apparatus and method for controlling ink jet printing apparatus

There is provided an image processing apparatus in which in a case of tone-expressing one pixel corresponding to a plurality of areas (printing resolution) in a multi-pass print, it is possible to output a uniform image without graininess or density unevenness over all-tone regions from a low-density region to a high-density region. To this end, by referring to dot patterns in which a print or a non-print of dots onto each pixel (area) corresponding to a printing resolution are in advance defined, quantization data is converted into binary data having the higher printing resolution. At this time, the dot patterns are prepared to be different from each other for M times of scans in a multi-pass print of M passes. In consequence, it is possible to restrict a variation of a coverage ratio due to a printing position displacement in each printing scan.

Image processing apparatus and image processing method

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.

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Yokohama, Japan

Kiichiro Takahashi