Patents by Inventor Miyuki Fujita
Miyuki Fujita 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: 9457586Abstract: With an ink jet head having for each color two parallel columns of nozzles arranged shifted by one-half the pitch, odd-numbered rasters and even-numbered rasters are printed by the two nozzle columns. The registration between the odd- and even-numbered rasters is secured during the printing to produce a high quality image. The ink ejection timing between the two raster groups is shifted by a predetermined interval to form adjustment patterns; the adjustment patterns are checked and, according to the check result, an adjustment value for the ink ejection timing between the two ink nozzle columns is entered, and the entered adjustment value is stored to be reflected on the actual printing operation. To facilitate the adjustment pattern check, the adjustment patterns have a dot distribution with a blue noise characteristic at a resolution at which the printing apparatus can print.Type: GrantFiled: March 24, 2015Date of Patent: October 4, 2016Assignee: Canon Kabushiki KaishaInventors: Miyuki Fujita, Hiroshi Tajika, Yuji Konno, Shuichi Murakami, Norihiro Kawatoko, Takayuki Ogasahara, Tetsuya Edamura, Tetsuhiro Maeda
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Patent number: 9114631Abstract: With an ink jet head having for each color two parallel columns of nozzles arranged shifted by one-half the pitch, odd-numbered rasters and even-numbered rasters are printed by the two nozzle columns. The registration between the odd- and even-numbered rasters is secured during the printing to produce a high quality image. The ink ejection timing between the two raster groups is shifted by a predetermined interval to form adjustment patterns; the adjustment patterns are checked and, according to the check result, an adjustment value for the ink ejection timing between the two ink nozzle columns is entered, and the entered adjustment value is stored to be reflected on the actual printing operation. To facilitate the adjustment pattern check, the adjustment patterns have a dot distribution with a blue noise characteristic at a resolution at which the printing apparatus can print.Type: GrantFiled: February 28, 2012Date of Patent: August 25, 2015Assignee: Canon Kabushiki KaishaInventors: Miyuki Fujita, Hiroshi Tajika, Yuji Konno, Shuichi Murakami, Norihiro Kawatoko, Takayuki Ogasahara, Tetsuya Edamura, Tetsuhiro Maeda
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Publication number: 20150191009Abstract: With an ink jet head having for each color two parallel columns of nozzles arranged shifted by one-half the pitch, odd-numbered rasters and even-numbered rasters are printed by the two nozzle columns. The registration between the odd- and even-numbered rasters is secured during the printing to produce a high quality image. The ink ejection timing between the two raster groups is shifted by a predetermined interval to form adjustment patterns; the adjustment patterns are checked and, according to the check result, an adjustment value for the ink ejection timing between the two ink nozzle columns is entered, and the entered adjustment value is stored to be reflected on the actual printing operation. To facilitate the adjustment pattern check, the adjustment patterns have a dot distribution with a blue noise characteristic at a resolution at which the printing apparatus can print.Type: ApplicationFiled: March 24, 2015Publication date: July 9, 2015Inventors: Miyuki Fujita, Hiroshi Tajika, Yuji Konno, Shuichi Murakami, Norihiro Kawatoko, Takayuki Ogasahara, Tetsuya Edamura, Tetsuhiro Maeda
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Publication number: 20120218330Abstract: With an ink jet head having for each color two parallel columns of nozzles arranged shifted by one-half the pitch, odd-numbered rasters and even-numbered rasters are printed by the two nozzle columns. The registration between the odd- and even-numbered rasters is secured during the printing to produce a high quality image. The ink ejection timing between the two raster groups is shifted by a predetermined interval to form adjustment patterns; the adjustment patterns are checked and, according to the check result, an adjustment value for the ink ejection timing between the two ink nozzle columns is entered, and the entered adjustment value is stored to be reflected on the actual printing operation. To facilitate the adjustment pattern check, the adjustment patterns have a dot distribution with a blue noise characteristic at a resolution at which the printing apparatus can print.Type: ApplicationFiled: February 28, 2012Publication date: August 30, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Miyuki Fujita, Hiroshi Tajika, Yuji Konno, Shuichi Murakami, Norihiro Kawatoko, Takayuki Ogasahara, Tetsuya Edamura, Tetsuhiro Maeda
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Patent number: 8147019Abstract: By using an ink jet head, which has for each color two parallel columns of nozzles arranged side by side in the main scan direction and shifted from each other by one-half the pitch at which the nozzles are arranged in each column, odd-numbered rasters and even-numbered rasters making up an image are printed by the two nozzle columns. The registration between the odd- and even-numbered rasters is secured during the printing to produce an image with high print quality. For that purpose, the ink ejection timing between the two raster groups is shifted by a predetermined interval to form a plurality of adjustment patterns; the adjustment patterns printed are checked and, according to the check result, an adjustment value for the ink ejection timing between the two ink nozzle columns is entered, and the entered adjustment value is stored to be reflected on the actual printing operation.Type: GrantFiled: August 22, 2005Date of Patent: April 3, 2012Assignee: Canon Kabushiki KaishaInventors: Miyuki Fujita, Hiroshi Tajika, Yuji Konno, Shuichi Murakami, Norihiro Kawatoko, Takayuki Ogasahara, Tetsuya Edamura, Tetsuhiro Maeda
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Patent number: 7533949Abstract: An image forming system includes an electronic device and image forming device. The electronic device has a recording unit for recording a target image together with a recording condition of the target image and an output unit for outputting an image and a recording condition recorded by the recording unit. The image forming device has a requesting unit for requesting the electronic device to output an image to be formed and an image forming unit for applying an image processing to an image output by the output unit responsive to a request by the requesting unit. The requesting unit controls a quality of an image that the image forming device requests the electronic device to output in conformity with the recording condition and an image forming condition.Type: GrantFiled: July 6, 2007Date of Patent: May 19, 2009Assignee: Canon Kabushiki KaishaInventors: Hirowo Inoue, Hisashi Ishikawa, Hiroshi Tajika, Miyuki Fujita, Yuji Konno, Kenji Takahashi, Norihiro Kawatoko
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Patent number: 7500739Abstract: Replacement of a recording head on a recording apparatus is detected on the basis of a serial number allocated to each recording head. The recording head also carries head characteristic information such as color information, shading information and so forth. When the recording head is replaced with a new one, the head characteristic information of the newly mounted recording head is automatically stored, so that head driving conditions are automatically determined to optimize the recording conditions without requiring any manual adjustment. Recovery operation is automatically executed when replacement of the recording head is detected, so that required recording conditions are recovered without manual instructions.Type: GrantFiled: November 1, 2004Date of Patent: March 10, 2009Assignee: Canon Kabushiki KaishaInventors: Yasuhiro Numata, Kazuyoshi Takahashi, Yoshiaki Takayanagi, Souhei Tanaka, Hiroshi Tajika, Noribumi Koitabashi, Hitoshi Sugimoto, Miyuki Fujita
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Patent number: 7477422Abstract: When recording a gradation pixel by performing pseudo-halftone processing, the occurrence of unevenness in the density in the recorded image is suppressed. For that purpose, when recording a pseudo-halftone image using dot patterns, a dot-pattern table storing a plurality of different dot patterns is provided for each gradation value. One dot-pattern table is selected from N dot-pattern tables based on gradation-value information for each pixel. One dot pattern is selected from the selected dot-pattern table, based on position information indicated by the pixel, and recording is performed using the selected dot pattern. It is thereby possible to prevent the concentrated use of a particular nozzle of a recording head, and suppress the occurrence of unevenness in the density due to characteristics of the specific nozzle.Type: GrantFiled: March 30, 2006Date of Patent: January 13, 2009Assignee: Canon Kabushiki KaishaInventors: Yuji Konno, Hisashi Ishikawa, Hiroshi Tajika, Miyuki Fujita, Norihiro Kawatoko, Tetsuya Edamura, Tetsuhiro Maeda
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Patent number: 7360852Abstract: An imaging apparatus which outputs image data to be processed by an image processing apparatus. The imaging apparatus includes an image acquiring unit, a storage, and a communication unit. The image acquiring unit is adapted to acquire image data from an image storing medium. The storage is adapted to store information of an image processing condition suited to the image processing apparatus. The information is usable to control image processing for the image data acquired by the image acquiring unit. The communication unit is adapted to communicate with the image processing apparatus to transmit the image data and the information of an image processing condition.Type: GrantFiled: January 13, 2005Date of Patent: April 22, 2008Assignee: Canon Kabushiki KaishaInventors: Hirowo Inoue, Hisashi Ishikawa, Hiroshi Tajika, Miyuki Fujita, Yuji Konno, Kenji Takahashi, Norihiro Kawatoko
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Publication number: 20070258117Abstract: An image forming system includes an electronic device and image forming device. The electronic device has a recording unit for recording a target image together with a recording condition of the target image and an output unit for outputting an image and a recording condition recorded by the recording unit. The image forming device has a requesting unit for requesting the electronic device to output an image to be formed and an image forming unit for applying an image processing to an image output by the output unit responsive to a request by the requesting unit. The requesting unit controls a quality of an image that the image forming device requests the electronic device to output in conformity with the recording condition and an image forming condition.Type: ApplicationFiled: July 6, 2007Publication date: November 8, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Hirowo Inoue, Hisashi Ishikawa, Hiroshi Tajika, Miyuki Fujita, Yuji Konno, Kenji Takahashi, Norihiro Kawatoko
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Patent number: 7130083Abstract: When recording a gradation pixel by performing pseudo-halftone processing, the occurrence of unevenness in the density in the recorded image is suppressed. For that purpose, when recording a pseudo-halftone image using dot patterns, a dot-pattern table storing a plurality of different dot patterns is provided for each gradation value. One dot-pattern table is selected from N dot-pattern tables based on gradation-value information for each pixel. One dot pattern is selected from the selected dot-pattern table, based on position information indicated by the pixel, and recording is performed using the selected dot pattern. It is thereby possible to prevent the concentrated use of a particular nozzle of a recording head, and suppress the occurrence of unevenness in the density due to characteristics of the specific nozzle.Type: GrantFiled: June 5, 2000Date of Patent: October 31, 2006Assignee: Canon Kabushiki KaishaInventors: Yuji Konno, Hisashi Ishikawa, Hiroshi Tajika, Miyuki Fujita, Norihiro Kawatoko, Tetsuya Edamura, Tetsuhiro Maeda
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Publication number: 20060187507Abstract: When recording a gradation pixel by performing pseudo-halftone processing, the occurrence of unevenness in the density in the recorded image is suppressed. For that purpose, when recording a pseudo-halftone image using dot patterns, a dot-pattern table storing a plurality of different dot patterns is provided for each gradation value. One dot-pattern table is selected from N dot-pattern tables based on gradation-value information for each pixel. One dot pattern is selected from the selected dot-pattern table, based on position information indicated by the pixel, and recording is performed using the selected dot pattern. It is thereby possible to prevent the concentrated use of a particular nozzle of a recording head, and suppress the occurrence of unevenness in the density due to characteristics of the specific nozzle.Type: ApplicationFiled: March 30, 2006Publication date: August 24, 2006Applicant: CANON KABUSHIKI KAISHAInventors: Yuji Konno, Hisashi Ishikawa, Hiroshi Tajika, Miyuki Fujita, Norihiro Kawatoko, Tetsuya Edamura, Tetsuhiro Maeda
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Patent number: 7057756Abstract: The present invention reduces the granularity of the dots for the entire density range by optimally setting formation amounts of a low-density dot and of a high-density dot per unit area. For this purpose, the formation amounts of the low-density dot and of the high-density dot in accordance with the density level are determined in such a way that as the density level rises, the formation amount of the low-density dot is gradually increased up to a first peak amount (200%) and, after reaching the first peak, gradually decreased, and in a range of density levels higher than a predetermined density level at which the low-density dot is formed to a specified amount (200%), as the density level rises, the formation amount of the high-density dot is gradually increased up to a second peak amount (100%) smaller than the first peak amount.Type: GrantFiled: July 13, 2001Date of Patent: June 6, 2006Assignee: Canon Kabushiki KaishaInventors: Takayuki Ogasahara, Hiroshi Tajika, Miyuki Fujita, Yuji Konno, Norihiro Kawatoko, Tetsuya Edamura, Tetsuhiro Maeda, Atsuhiko Masuyama
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Publication number: 20060044334Abstract: By using an ink jet head, which has for each color two parallel columns of nozzles arranged side by side in the main scan direction and shifted from each other by one-half the pitch at which the nozzles are arranged in each column, odd-numbered rasters and even-numbered rasters making up an image are printed by the two nozzle columns. The registration between the odd- and even-numbered rasters is secured during the printing to produce an image with high print quality. For that purpose, the ink ejection timing between the two raster groups is shifted by a predetermined interval to form a plurality of adjustment patterns; the adjustment patterns printed are checked and, according to the check result, an adjustment value for the ink ejection timing between the two ink nozzle columns is entered, and the entered adjustment value is stored to be reflected on the actual printing operation.Type: ApplicationFiled: August 22, 2005Publication date: March 2, 2006Applicant: Canon Kabushiki KaishaInventors: Miyuki Fujita, Hiroshi Tajika, Yuji Konno, Shuichi Murakami, Norihiro Kawatoko, Takayuki Ogasahara, Tetsuya Edamura, Tetsuhiro Maeda
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Patent number: 6967745Abstract: When highly redundant information that expresses five tones using 4 bits is transferred to a printer in terms of a unit data length in data transfer, efficiency is very poor. Hence, multi-valued data is quantized to 5-valued data, which is output as a 4-bit code that can express five values. 4-bit codes for three bits are combined to be converted into an 8-bit code. The 8-bit codes are packed into data of a 16-bit unit, and the packed data is transferred to the printer.Type: GrantFiled: August 25, 2000Date of Patent: November 22, 2005Assignee: Canon Kabushiki KaishaInventors: Yuji Konno, Hisashi Ishikawa, Hiroshi Tajika, Miyuki Fujita, Norihiro Kawatoko, Tetsuya Edamura, Tetsuhiro Maeda
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Patent number: 6960036Abstract: By using an ink jet head, which has for each color two parallel columns of nozzles arranged side by side in the main scan direction and shifted from each other by one-half the pitch at which the nozzles are arranged in each column, odd-numbered rasters and even-numbered rasters making up an image are printed by the two nozzle columns. The registration between the odd- and even-numbered rasters is secured during the printing to produce an image with high print quality. For that purpose, the ink ejection timing between the two raster groups is shifted by a predetermined interval to form a plurality of adjustment patterns; the adjustment patterns printed are checked and, according to the check result, an adjustment value for the ink ejection timing between the two ink nozzle columns is entered; and the entered adjustment value is stored to be reflected on the actual printing operation.Type: GrantFiled: August 15, 2000Date of Patent: November 1, 2005Assignee: Canon Kabushiki KaishaInventors: Miyuki Fujita, Hiroshi Tajika, Yuji Konno, Shuichi Murakami, Norihiro Kawatoko, Takayuki Ogasahara, Tetsuya Edamura, Tetsuhiro Maeda
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Patent number: 6957880Abstract: The present invention relates to an ink jet printing apparatus which sufficiently heats a head even in a low-temperature environment, which enables a proper image to be printed by stably ejecting ink, and which can be inexpensively and simply constructed. According to the present invention, if the detected temperature of a printhead is lower than a first heating threshold temperature, a heating mode in which the printhead can be heated is set before a printing operation. Further, when the heating mode is set and the detected temperature of the printhead is lower than a second heating threshold temperature, a heating unit heats the printhead. Consequently, even in a low-temperature environment, the heating operation keeps ink in a desired condition suitable for printing.Type: GrantFiled: July 29, 2002Date of Patent: October 25, 2005Assignee: Canon Kabushiki KaishaInventors: Norihiro Kawatoko, Hiroshi Tajika, Miyuki Fujita, Yuji Konno, Takayuki Ogasahara, Tetsuya Edamura, Tetsuhiro Maeda, Atsuhiko Masuyama
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Publication number: 20050122411Abstract: An imaging apparatus which outputs image data to be processed by an image processing apparatus. The imaging apparatus includes an image acquiring unit, a storage, and a communication unit. The image acquiring unit is adapted to acquire image data from an image storing medium. The storage is adapted to store information of an image processing condition suited to the image processing apparatus. The information is usable to control image processing for the image data acquired by the image acquiring unit. The communication unit is adapted to communicate with the image processing apparatus to transmit the image data and the information of an image processing condition.Type: ApplicationFiled: January 13, 2005Publication date: June 9, 2005Applicant: CANON KABUSHIKI KAISHAInventors: Hirowo Inoue, Hisashi Ishikawa, Hiroshi Tajika, Miyuki Fujita, Yuji Konno, Kenji Takahashi, Norihiro Kawatoko
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Patent number: 6885472Abstract: A printer stores head information about a printhead in an EEPROM, and outputs the head information from an I/F. A host computer receives the head information, and sets the processing parameters of an image processor for printing data to be output to the printer on the basis of the input head information.Type: GrantFiled: August 18, 2000Date of Patent: April 26, 2005Assignee: Canon Kabushiki KaishaInventors: Yuji Konno, Miyuki Fujita, Tetsuhiro Maeda
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Publication number: 20050083365Abstract: Replacement of a recording head on a recording apparatus is detected on the basis of a serial number allocated to each recording head. The recording head also carries head characteristic information such as color information, shading information and so forth. When the recording head is replaced with a new one, the head characteristic information of the newly mounted recording head is automatically stored, so that head driving conditions are automatically determined to optimize the recording conditions without requiring any manual adjustment. Recovery operation is automatically executed when replacement of the recording head is detected, so that required recording conditions are recovered without manual instructions.Type: ApplicationFiled: November 1, 2004Publication date: April 21, 2005Applicant: CANON KABUSHIKI KAISHAInventors: Yasuhiro Numata, Kazuyoshi Takahashi, Yoshiaki Takayanagi, Hiroshi Tajika, Noribumi Koitabashi, Hitoshi Sugimoto, Souhei Tanaka, Miyuki Fujita