Patents by Inventor Ryoki Jahana
Ryoki Jahana 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: 8184339Abstract: 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.Type: GrantFiled: July 5, 2011Date of Patent: May 22, 2012Assignee: Canon Kabushiki KaishaInventors: Yoshitomo Marumoto, Hiromitsu Yamaguchi, Hitoshi Tsuboi, Ryoki Jahana, Ayako Uji, Eri Noguchi
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Publication number: 20110261373Abstract: 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.Type: ApplicationFiled: July 5, 2011Publication date: October 27, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Yoshitomo Marumoto, Hiromitsu Yamaguchi, Hitoshi Tsuboi, Ryoki Jahana, Ayako Uji, Eri Noguchi
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Patent number: 8018621Abstract: 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.Type: GrantFiled: August 1, 2008Date of Patent: September 13, 2011Assignee: Canon Kabushiki KaishaInventors: Yoshitomo Marumoto, Hiromitsu Yamaguchi, Hitoshi Tsuboi, Ryoki Jahana, Ayako Uji, Eri Noguchi
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Patent number: 8007067Abstract: 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.Type: GrantFiled: September 18, 2008Date of Patent: August 30, 2011Assignee: Canon Kabushiki KaishaInventors: Ryoki Jahana, Ayako Uji
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Patent number: 7911650Abstract: Development of uneven gloss is reduced when printing mutually adjacent printing regions with pigment ink while overlapping boundary regions each other. A joint section and a non-joint section employ mutually different image processing such that a larger amount of ink having a relatively higher gloss level is used in the joint section as compared to the non-joint section. In this way, it is possible to uniform gloss impression between the non-joint section and the joint section and thereby to reduce uneven gloss.Type: GrantFiled: June 9, 2008Date of Patent: March 22, 2011Assignee: Canon Kabushiki KaishaInventors: Ryoki Jahana, Yoshitomo Marumoto
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Patent number: 7517052Abstract: 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.Type: GrantFiled: December 8, 2004Date of Patent: April 14, 2009Assignee: Canon Kabushiki KaishaInventors: Satoshi Wada, Makoto Akahira, Tsuyoshi Shibata, Hiromitsu Yamaguchi, Yoshitomo Marumoto, Ryoki Jahana, Yasunori Fujimoto, Takashi Ochiai, Eri Goto
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Publication number: 20090040550Abstract: 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.Type: ApplicationFiled: August 1, 2008Publication date: February 12, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Yoshitomo Marumoto, Hiromitsu Yamaguchi, Hitoshi Tsuboi, Ryoki Jahana, Ayako Uji, Eri Noguchi
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Patent number: 7481516Abstract: In an inkjet recording apparatus and an inkjet recording method, recording on a first unit region, of unit regions provided on a recording medium, is performed by scanning a recording head an even number of times over the first unit region, and recording on a second unit region adjacent to the first unit region is performed by scanning the recording head an odd number of times over the second unit region. The last of the scanning motions of the recording head over the first and second unit regions is made in a first direction.Type: GrantFiled: January 28, 2008Date of Patent: January 27, 2009Assignee: Canon Kabushiki KaishaInventors: Ryoki Jahana, Yoshitomo Marumoto
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Publication number: 20090015614Abstract: 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.Type: ApplicationFiled: September 18, 2008Publication date: January 15, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Ryoki Jahana, Ayako Uji
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Publication number: 20090015849Abstract: Development of uneven gloss is reduced when printing mutually adjacent printing regions with pigment ink while overlapping boundary regions each other. A joint section and a non-joint section employ mutually different image processing such that a larger amount of ink having a relatively higher gloss level is used in the joint section as compared to the non-joint section. In this way, it is possible to uniform gloss impression between the non-joint section and the joint section and thereby to reduce uneven gloss.Type: ApplicationFiled: June 9, 2008Publication date: January 15, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Ryoki Jahana, Yoshitomo Marumoto
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Publication number: 20090002414Abstract: There is provided an inkjet printing apparatus which prints using a printhead for discharging ink by a plurality of scanning operations of the printhead including forward scanning and reverse scanning in a single area of a print medium. In the inkjet printing apparatus, the ink discharge amount is acquired for each unit area obtained by dividing the end area of the single area in the scanning direction. The acquired ink discharge amount of each unit area is compared with a predetermined threshold. The printing ratios of the plurality of scanning operations are controlled to set the printing ratio of the final scanning operation lower than the average one of the remaining scanning operations in a unit area where the ink discharge amount is larger than the predetermined threshold.Type: ApplicationFiled: June 24, 2008Publication date: January 1, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Tsuyoshi Shibata, Hiromitsu Yamaguchi, Satoshi Wada, Ryoki Jahana
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Patent number: 7441854Abstract: 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.Type: GrantFiled: June 6, 2006Date of Patent: October 28, 2008Assignee: Canon Kabushiki KaishaInventors: Ryoki Jahana, Ayako Uji
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Publication number: 20080204494Abstract: In an inkjet recording apparatus and an inkjet recording method, recording on a first unit region, of unit regions provided on a recording medium, is performed by scanning a recording head an even number of times over the first unit region, and recording on a second unit region adjacent to the first unit region is performed by scanning the recording head an odd number of times over the second unit region. The last of the scanning motions of the recording head over the first and second unit regions is made in a first direction.Type: ApplicationFiled: January 28, 2008Publication date: August 28, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Ryoki Jahana, Yoshitomo Marumoto
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Patent number: 7399049Abstract: When a malfunction nozzle occurs in a joint portion of print elements in a print head, the print head is controlled to minimize image impairments caused by the malfunction nozzle. This prevents an increase in cost of the print head and increases the printing speed while at the same time realizing a high quality of printed image. For the control of the overlapping nozzles in the adjoining print chips, a desired control mode is selectively set from among a plurality of control modes, the control modes having different nozzles removed from use.Type: GrantFiled: May 31, 2006Date of Patent: July 15, 2008Assignee: Canon Kabushiki KaishaInventors: Ryoki Jahana, Satoshi Wada
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Publication number: 20060279606Abstract: 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.Type: ApplicationFiled: June 6, 2006Publication date: December 14, 2006Applicant: CANON KABUSHIKI KAISHAInventors: Ryoki Jahana, Ayako Uji
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Publication number: 20060274099Abstract: When a malfunction nozzle occur in a joint portion of print elements in a print head, this invention controls the print head to minimize image impairments caused by the malfunction nozzle. This prevents an increase in cost of the print head and increases the printing speed while at the same time realizing a high quality of printed image. For the control of the overlapping nozzles in the adjoining print chips, a desired control mode is selectively set from among a plurality of control modes, the control modes having different nozzles removed from use.Type: ApplicationFiled: May 31, 2006Publication date: December 7, 2006Applicant: Canon Kabushiki KaishaInventors: Ryoki Jahana, Satoshi Wada
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Publication number: 20050128248Abstract: 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.Type: ApplicationFiled: December 8, 2004Publication date: June 16, 2005Applicant: Canon Kabushiki KaishaInventors: Satoshi Wada, Makoto Akahira, Tsuyoshi Shibata, Hiromitsu Yamaguchi, Yoshitomo Marumoto, Ryoki Jahana, Yasunori Fujimoto, Takashi Ochiai, Eri Goto