Patents by Inventor Toshiyuki Chikuma
Toshiyuki Chikuma has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8348372Abstract: An ink jet printing apparatus and an ink jet printing method are provided in which information about an ink amount ejected on each of unit areas into which a preceding print medium is divided and information about a size of a following print medium are acquired. A delay time for delaying a printing operation for the following print medium is set based on the information about the ink amount ejected on unit areas which are decided among the divided unit areas according to the information about the size of the following print medium.Type: GrantFiled: December 15, 2009Date of Patent: January 8, 2013Assignee: Canon Kabushiki KaishaInventors: Toshiyuki Chikuma, Hirokazu Yoshikawa, Susumu Hirosawa
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Patent number: 8328311Abstract: Degradation in image quality due to disturbance in landing positions of satellites is suppressed. When scanning and printing with a printing head which has a first nozzle array ejecting relatively large ejection amount of ink, a second nozzle array arranged on one side of the first nozzle array in a scan direction and a third nozzle array arranged on the other side of the first nozzle array in the scan direction, the second and third nozzle arrays ejecting a relatively small ejection amount of ink with the same color, a printing rate of one of the second and third nozzle arrays located at the front side in the scan direction is controlled lower than that of the other located at the back side.Type: GrantFiled: August 6, 2010Date of Patent: December 11, 2012Assignee: Canon Kabushiki KaishaInventors: Takatoshi Nakano, Kiichiro Takahashi, Tetsuya Edamura, Toshiyuki Chikuma, Hirokazu Tanaka, Wakako Yamamoto
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Patent number: 8184342Abstract: A recording apparatus, performing recording by time-division driving of multiple recording elements on a recording head in increments of blocks, includes: a storing unit storing recording data; an obtaining unit obtaining information relating to inclination of the recording elements in the main scanning direction; a changing unit changing, in increments of recording elements, the main scanning direction storage position of recording data stored in the storing unit to be provided to recording elements of a group, configured of consecutive recording elements in each block of the recording elements, based on the obtained information; and a determining unit determining the driving order of the recording elements subjected to time-division driving in increments of the blocks, for each of the scans; wherein recording is performed based on recording data with the main scanning direction storage position having been changed by the changing unit, and the driving order determined by the determining unit.Type: GrantFiled: June 27, 2008Date of Patent: May 22, 2012Assignee: Canon Kabushiki KaishaInventors: Susumu Hirosawa, Jiro Moriyama, Hidehiko Kanda, Norihiro Kawatoko, Toshiyuki Chikuma, Atsushi Sakamoto, Hirokazu Tanaka, Masashi Hayashi
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Patent number: 8177322Abstract: Quality degradation of a print image due to a deviation amount in a landing position of ink is prevented while suppressing degradation of through-put. In a method of completing a print to a unit region by at least one reciprocal scan to the unit region of a print medium by a printing head in which plural ink ejection ports are arrayed for ejecting ink, a printing rate in a scan direction where a deviation amount in a landing position of ink in an array direction of the ink ejection ports is relatively large is set relatively low and the printing rate in the scan direction where the deviation amount in the landing position of ink in the array direction of the ink ejection ports is relatively small is set relatively high.Type: GrantFiled: July 23, 2010Date of Patent: May 15, 2012Assignee: Canon Kabushiki KaishaInventors: Takatoshi Nakano, Kiichiro Takahashi, Tetsuya Edamura, Toshiyuki Chikuma, Hirokazu Tanaka, Wakako Yamamoto
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Patent number: 8177328Abstract: Provided are an ink jet printing apparatus and an ink jet printing method which are capable of printing high-quality images by performing printing scanning in a forward direction and in an opposite direction without needing complicated control of a transfer amount of a printing medium nor causing throughput degradation. Inks are ejected from odd-numbered nozzles in scanning in the forward direction and are ejected from even-numbered nozzles in scanning in the opposite direction.Type: GrantFiled: September 22, 2008Date of Patent: May 15, 2012Assignee: Canon Kabushiki KaishaInventors: Hirokazu Yoshikawa, Hidehiko Kanda, Norihiro Kawatoko, Toshiyuki Chikuma
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Patent number: 8164789Abstract: In an image processing method, on the basis of input image data with respect to a target pixel, independent multi-level data (g0, g1) corresponding to respective plural species of dots which are different in at least one of a density and a diameter are generated, and then data (O0, O1) relating to an amount of generation of the dots with respect to the target pixel are generated on the basis of a relationship between the generated independent multi-level data (g0, g1) corresponding to the plural species of dots. The image processing method is effective in performing design having a high degree of flexibility in proper use of a relatively high power dot (high density dot or large dot) and a relatively low power dot (low density dot or small dot) and can realize obviation or alleviation of an occurrence of granulation or an apparent frame caused due to the relatively high power dot.Type: GrantFiled: January 9, 2009Date of Patent: April 24, 2012Assignee: Canon Kabushiki KaishaInventors: Hitoshi Nishikori, Naoji Otsuka, Kiichiro Takahashi, Osamu Iwasaki, Minoru Teshigawara, Takeshi Yazawa, Toshiyuki Chikuma
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Patent number: 8162432Abstract: A recording apparatus scans a recording head in a main scanning direction to perform time-division driving for a plurality of blocks of recording elements to perform recording. The recording apparatus includes an obtaining unit configured to obtain information regarding inclination of the recording element array with respect to a main scanning direction, a first changing unit configured to change, in units of recording elements, based on the obtained information, storage positions of recording data items that are stored in a storage unit and that are assigned to recording elements in each of groups, each of the groups including recording elements belonging to the blocks in the recording element array which are consecutive, and a second changing unit configured to change, in units of groups, based on the obtained information, the storage positions of the recording data items in the main scanning direction.Type: GrantFiled: March 14, 2011Date of Patent: April 24, 2012Assignee: Canon Kabushiki KaishaInventors: Masashi Hayashi, Norihiro Kawatoko, Hidehiko Kanda, Toshiyuki Chikuma, Minoru Teshigawara
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Patent number: 8136908Abstract: The present invention provides an ink jet printing apparatus and a method for controlling temperature for the ink jet printing apparatus wherein the temperature of a print head, which may lower during printing, is controlled before printing without using any sub-heater to allow a favorable ejection condition to be established without reducing the head temperature below a predetermined value. Thus, scan width information and dot count information are acquired before a carriage starts scanning to determine the heating temperature of the print head on the basis of the information.Type: GrantFiled: January 22, 2010Date of Patent: March 20, 2012Assignee: Canon Kabushiki KaishaInventors: Hirokazu Tanaka, Yuji Hamasaki, Hidehiko Kanda, Norihiro Kawatoko, Atsushi Sakamoto, Toshiyuki Chikuma, Aya Hayashi, Masashi Hayashi, Jiro Moriyama
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Publication number: 20120062636Abstract: 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.Type: ApplicationFiled: September 8, 2011Publication date: March 15, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Wakako Yamamoto, Kiichiro Takahashi, Tetsuya Edamura, Toshiyuki Chikuma, Hirokazu Tanaka, Takatoshi Nakano
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Publication number: 20120026227Abstract: An ink jet printing apparatus and printing method are provided that can, without the addition of a special structure, suppress density imbalance between the print images formed by ink ejected from each of the ejection ports formed on a print head. As for the plurality of ejection ports, one portion of them are established as multiple impact ejection ports that form multiply impacted pixels at which the number of times ink is impacted at the same area is greater than at other pixels of the print area. And, print control is carried out such that more multiply impacted pixels are printed at print areas printed using ejection ports at the ends of the print head than at print areas printed without using ejection ports at the ends of the print head.Type: ApplicationFiled: July 22, 2011Publication date: February 2, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Hirokazu Tanaka, Tetsuya Edamura, Toshiyuki Chikuma, Takatoshi Nakano, Wakako Yamamoto, Kiichiro Takahashi
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Publication number: 20110164261Abstract: A recording apparatus scans a recording head in a main scanning direction to perform time-division driving for a plurality of blocks of recording elements to perform recording. The recording apparatus includes an obtaining unit configured to obtain information regarding inclination of the recording element array with respect to a main scanning direction, a first changing unit configured to change, in units of recording elements, based on the obtained information, storage positions of recording data items that are stored in a storage unit and that are assigned to recording elements in each of groups, each of the groups including recording elements belonging to the blocks in the recording element array which are consecutive, and a second changing unit configured to change, in units of groups, based on the obtained information, the storage positions of the recording data items in the main scanning direction.Type: ApplicationFiled: March 14, 2011Publication date: July 7, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Masashi Hayashi, Norihiro Kawatoko, Hidehiko Kanda, Toshiyuki Chikuma, Minoru Teshigawara
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Patent number: 7946678Abstract: In the case where a multipass printing and an interlace printing are used together, the present invention enables outputting an image of good quality independently of the relation between the number of passes in the multipass printing and increase in the resolution in the sub-scanning direction through the interlace printing. Data processing is executed while pixels of inputted image data are made to correspond to two or more rasters in the sub-scanning direction, so that the dots are arranged in these rasters at a substantially equal rate, in the case where the number of print scannings to be executed multiple times is not an integral multiple of the number of rasters.Type: GrantFiled: September 17, 2008Date of Patent: May 24, 2011Assignee: Canon Kabushiki KaishaInventor: Toshiyuki Chikuma
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Patent number: 7926893Abstract: A recording apparatus scans a recording head in a main scanning direction to perform time-division driving for a plurality of blocks of recording elements to perform recording. The recording apparatus includes an obtaining unit configured to obtain information regarding inclination of the recording element array with respect to a main scanning direction, a first changing unit configured to change, in units of recording elements, based on the obtained information, storage positions of recording data items that are stored in a storage unit and that are assigned to recording elements in each of groups, each of the groups including recording elements belonging to the blocks in the recording element array which are consecutive, and a second changing unit configured to change, in units of groups, based on the obtained information, the storage positions of the recording data items in the main scanning direction.Type: GrantFiled: June 9, 2008Date of Patent: April 19, 2011Assignee: Canon Kabushiki KaishaInventors: Masashi Hayashi, Norihiro Kawatoko, Hidehiko Kanda, Toshiyuki Chikuma, Minoru Teshigawara
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Publication number: 20110037806Abstract: Quality degradation of a print image due to a deviation amount in a landing position of ink is prevented while suppressing degradation of through-put. In a method of completing a print to a unit region by at least one reciprocal scan to the unit region of a print medium by a printing head in which plural ink ejection ports are arrayed for ejecting ink, a printing rate in a scan direction where a deviation amount in a landing position of ink in an array direction of the ink ejection ports is relatively large is set relatively low and the printing rate in the scan direction where the deviation amount in the landing position of ink in the array direction of the ink ejection ports is relatively small is set relatively high.Type: ApplicationFiled: July 23, 2010Publication date: February 17, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Takatoshi Nakano, Kiichiro Takahashi, Tetsuya Edamura, Toshiyuki Chikuma, Hirokazu Tanaka, Wakako Yamamoto
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Publication number: 20110037799Abstract: Degradation in image quality due to disturbance in landing positions of satellites is suppressed. When scanning and printing with a printing head which has a first nozzle array ejecting relatively large ejection amount of ink, a second nozzle array arranged on one side of the first nozzle array in a scan direction and a third nozzle array arranged on the other side of the first nozzle array in the scan direction, the second and third nozzle arrays ejecting a relatively small ejection amount of ink with the same color, a printing rate of one of the second and third nozzle arrays located at the front side in the scan direction is controlled lower than that of the other located at the back side.Type: ApplicationFiled: August 6, 2010Publication date: February 17, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Takatoshi Nakano, Kiichiro Takahashi, Tetsuya Edamura, Toshiyuki Chikuma, Hirokazu Tanaka, Wakako Yamamoto
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Publication number: 20100309242Abstract: According to the present invention, a recording apparatus is provided which is capable of recording a plurality of patterns, on a recording medium, for detecting an amount of displacement between a recording position of a first discharge port array and a recording position of a second discharge port array in a conveyance direction and acquiring an amount of inclination based on the amount of displacement without conveying the recording medium.Type: ApplicationFiled: June 4, 2010Publication date: December 9, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Toshiyuki Chikuma, Kiichiro Takahashi, Tetsuya Edamura, Hirokazu Tanaka, Takatoshi Nakano, Wakako Yamamoto
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Patent number: 7819497Abstract: Printing can be properly performed on a print medium other than print media preset in accordance with print modes of a printer. Specifically, when the print medium other than the print media preset in accordance with the print modes is used, patches are printed on the print medium in each combination of the ink ejection amount and the number of passes, and information regarding each evaluation of granularity and banding based on colorimetry of the patches is obtained for each combination of the ink ejection amount and the number of passes. Next, a combination of the maximum ink ejection amount and the maximum number of passes is selected from the combinations that each evaluation of the granularity and the banding satisfies a certain level. Then, a print mode having a combination nearest the combination is selected from the plurality of print modes.Type: GrantFiled: December 12, 2007Date of Patent: October 26, 2010Assignee: Canon Kabushiki KaishaInventors: Yuji Konno, Hiroshi Tajika, Hitoshi Nishikori, Daisaku Ide, Hideaki Takamiya, Kiichiro Takahashi, Toshiyuki Chikuma
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Publication number: 20100156981Abstract: An ink jet printing apparatus and an ink jet printing method are provided in which information about an ink amount ejected on each of unit areas into which a preceding print medium is divided and information about a size of a following print medium are acquired. A delay time for delaying a printing operation for the following print medium is set based on the information about the ink amount ejected on unit areas which are decided among the divided unit areas according to the information about the size of the following print medium.Type: ApplicationFiled: December 15, 2009Publication date: June 24, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Toshiyuki Chikuma, Hirokazu Yoshikawa, Susumu Hirosawa
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Patent number: 7735946Abstract: The present invention provides an ink jet printing apparatus and a method for controlling temperature for the ink jet printing apparatus wherein the temperature of a print head, which may lower during printing, is controlled before printing without using any sub-heater to allow a favorable ejection condition to be established without reducing the head temperature below a predetermined value. Thus, scan width information and dot count information are acquired before a carriage starts scanning to determine the heating temperature of the print head on the basis of the information.Type: GrantFiled: June 5, 2007Date of Patent: June 15, 2010Assignee: Canon Kabushiki KaishaInventors: Hirokazu Tanaka, Yuji Hamasaki, Hidehiko Kanda, Norihiro Kawatoko, Atsushi Sakamoto, Toshiyuki Chikuma, Aya Hayashi, Masashi Hayashi, Jiro Moriyama
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Publication number: 20100118080Abstract: The present invention provides an ink jet printing apparatus and a method for controlling temperature for the ink jet printing apparatus wherein the temperature of a print head, which may lower during printing, is controlled before printing without using any sub-heater to allow a favorable ejection condition to be established without reducing the head temperature below a predetermined value. Thus, scan width information and dot count information are acquired before a carriage starts scanning to determine the heating temperature of the print head on the basis of the information.Type: ApplicationFiled: January 22, 2010Publication date: May 13, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Hirokazu TANAKA, Yuji HAMASAKI, Hidehiko KANDA, Norihiro KAWATOKO, Atsushi SAKAMOTO, Toshiyuki CHIKUMA, Aya HAYASHI, Masashi HAYASHI, Jiro MORIYAMA