Patents by Inventor Makoto Higashiyama
Makoto Higashiyama 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: 9847792Abstract: A communication apparatus includes a serializer configured to convert parallel data into serial data and output the serial data; and a deserializer configured to convert the serial data output from the serializer into parallel data and output the parallel data. The serializer is configured to add first data used for detecting unique data in the parallel data before the unique data, add second data used for detecting the unique data after the unique data, and add third data whose length is variable to each of the first data and the second data.Type: GrantFiled: January 12, 2016Date of Patent: December 19, 2017Assignee: RICOH COMPANY, LTD.Inventors: Tatsuya Miyadera, Satoshi Ohmiya, Tatsuo Ohyama, Masahiko Oikawa, Yuichiro Shukuya, Makoto Higashiyama, Yasuhiro Abe
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Patent number: 9588472Abstract: An image formation apparatus for forming an image and test patterns. The image formation apparatus includes a storage unit that stores dither matrix data used to form the image and the test patterns; and an image formation unit that forms the test patterns based on the dither matrix data. A number of tones of the test patterns to be formed by the image formation unit is changed and the number of tones is determined based on a size of the dither matrix data and a number of bits per pixel within the dither matrix data.Type: GrantFiled: July 13, 2015Date of Patent: March 7, 2017Assignee: Ricoh Company, Ltd.Inventors: Yasuhiro Abe, Satoshi Ohmiya, Masahiko Oikawa, Makoto Higashiyama, Yuichiro Shukuya, Tatsuya Miyadera
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Patent number: 9397697Abstract: A communication apparatus includes a serializer configured to convert parallel data into serial data and output the serial data; and a deserializer configured to convert the serial data output from the serializer into parallel data and output the parallel data. The serializer is configured to add first data used for detecting unique data in the parallel data before the unique data, add second data used for detecting the unique data after the unique data, and add third data whose length is variable to each of the first data and the second data.Type: GrantFiled: January 20, 2015Date of Patent: July 19, 2016Assignee: RICOH COMPANY, LTD.Inventors: Tatsuya Miyadera, Satoshi Ohmiya, Tatsuo Ohyama, Masahiko Oikawa, Yuichiro Shukuya, Makoto Higashiyama, Yasuhiro Abe
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Publication number: 20160126977Abstract: A communication apparatus includes a serializer configured to convert parallel data into serial data and output the serial data; and a deserializer configured to convert the serial data output from the serializer into parallel data and output the parallel data. The serializer is configured to add first data used for detecting unique data in the parallel data before the unique data, add second data used for detecting the unique data after the unique data, and add third data whose length is variable to each of the first data and the second data.Type: ApplicationFiled: January 12, 2016Publication date: May 5, 2016Inventors: Tatsuya MIYADERA, Satoshi OHMIYA, Tatsuo OHYAMA, Masahiko OIKAWA, Yuichiro SHUKUYA, Makoto HIGASHIYAMA, Yasuhiro ABE
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Publication number: 20160018774Abstract: An image formation apparatus for forming an image and test patterns. The image formation apparatus includes a storage unit that stores dither matrix data used to form the image and the test patterns; and an image formation unit that forms the test patterns based on the dither matrix data. A number of tones of the test patterns to be formed by the image formation unit is changed and the number of tones is determined based on a size of the dither matrix data and a number of bits per pixel within the dither matrix data.Type: ApplicationFiled: July 13, 2015Publication date: January 21, 2016Applicant: RICOH COMPANY, LTD.Inventors: Yasuhiro Abe, Satoshi Ohmiya, Masahiko Oikawa, Makoto Higashiyama, Yuichiro Shukuya, Tatsuya Miyadera
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Publication number: 20150222290Abstract: A communication apparatus includes a serializer configured to convert parallel data into serial data and output the serial data; and a deserializer configured to convert the serial data output from the serializer into parallel data and output the parallel data. The serializer is configured to add first data used for detecting unique data in the parallel data before the unique data, add second data used for detecting the unique data after the unique data, and add third data whose length is variable to each of the first data and the second data.Type: ApplicationFiled: January 20, 2015Publication date: August 6, 2015Inventors: Tatsuya MIYADERA, Satoshi OHMIYA, Tatsuo OHYAMA, Masahiko OIKAWA, Yuichiro SHUKUYA, Makoto HIGASHIYAMA, Yasuhiro ABE
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Patent number: 8730522Abstract: An image forming apparatus includes a first light source that emits light when color print is specified; a first deflection unit that deflects the light emitted from the first light source; a first driving unit that drives the first deflection unit; a second light source that emits light when color print is specified and when monochrome print is specified; a second deflection unit that deflects the light emitted from the second light source; a second driving unit that drives the second deflection unit; a control unit that, when a image data receiving unit receives first image data and information specifying that the first image data is to be printed in monochrome and receives second image data and information specifying that the second image data is to be printed in color, causes the first driving unit to operate while a monochrome image corresponding to the first image data is being formed.Type: GrantFiled: July 27, 2012Date of Patent: May 20, 2014Assignee: Ricoh Company, LimitedInventor: Makoto Higashiyama
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Patent number: 8659629Abstract: An image forming apparatus that includes an optical writing device for applying light corresponding to image data to form a first image of the image data includes: a temperature detecting unit that detects temperature at a plurality of positions in the optical writing device; and an adjustment processing unit that, when a temperature difference between the positions detected by the temperature detecting unit is out of a predetermined range, forms a second image for quality verification and performs a process for adjusting color registration of the first image by using the second image.Type: GrantFiled: February 16, 2012Date of Patent: February 25, 2014Assignee: Ricoh Company, LimitedInventor: Makoto Higashiyama
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Patent number: 8488203Abstract: An image forming apparatus includes a skew correcting unit that performs skew correction by dividing an input image that has undergone a halftone process into image data in a predetermined skew correction area in a main scanning direction and by shifting the image data in the skew correction area in a sub-scanning direction; an edge detecting unit that detects whether a pixel at a division position is an edge pixel based on concentrations of a set of pixels including the pixel at the division position; a correction area determining unit that, if detected that the pixel at the division position is the edge pixel, determines a correction area that is an area of pixels including the edge pixel to be subjected to concentration correction within the skew correction area; and an edge correcting unit that corrects concentrations of the pixels within the correction area.Type: GrantFiled: March 17, 2010Date of Patent: July 16, 2013Assignee: Ricoh Company, LimitedInventors: Makoto Higashiyama, Yoshiaki Kawai, Shingo Nishizaki, Tomohide Kondoh, Masashi Suzuki
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Publication number: 20130038885Abstract: An image forming apparatus includes a first light source that emits light when color print is specified; a first deflection unit that deflects the light emitted from the first light source; a first driving unit that drives the first deflection unit; a second light source that emits light when color print is specified and when monochrome print is specified; a second deflection unit that deflects the light emitted from the second light source; a second driving unit that drives the second deflection unit; a control unit that, when a image data receiving unit receives first image data and information specifying that the first image data is to be printed in monochrome and receives second image data and information specifying that the second image data is to be printed in color, causes the first driving unit to operate while a monochrome image corresponding to the first image data is being formed.Type: ApplicationFiled: July 27, 2012Publication date: February 14, 2013Inventor: Makoto HIGASHIYAMA
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Patent number: 8320024Abstract: An image forming apparatus capable of minimizing degradation in density correction as a part of skew correction includes a noise-occurrence determining unit, a correction-target-pixel selecting unit, a density correcting unit, and a phase correcting unit. When the noise-occurrence determining unit determines that noise would appear, the density correcting unit performs density correction on a correction target pixel that is determined by the correction-target-pixel selecting unit. The phase correcting unit corrects an output point in time of image data of the density-corrected correction target pixel in a pixel period during which the image data can be output so as to output the image data at a position displaced away from a shift position or toward a shift position.Type: GrantFiled: March 16, 2009Date of Patent: November 27, 2012Assignee: Ricoh Company, LimitedInventors: Yoshiaki Kawai, Shingo Nishizaki, Makoto Higashiyama, Tomohide Kondoh, Masashi Suzuki
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Publication number: 20120229585Abstract: An image forming apparatus that includes an optical writing device for applying light corresponding to image data to form a first image of the image data includes: a temperature detecting unit that detects temperature at a plurality of positions in the optical writing device; and an adjustment processing unit that, when a temperature difference between the positions detected by the temperature detecting unit is out of a predetermined range, forms a second image for quality verification and performs a process for adjusting color registration of the first image by using the second image.Type: ApplicationFiled: February 16, 2012Publication date: September 13, 2012Applicant: RICOH COMPANY, LIMITEDInventor: Makoto Higashiyama
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Patent number: 8159722Abstract: An image forming apparatus capable of accurately compensating an increase or decrease of a toner area coverage resulting from shifting that is performed to correct skew is provided. A color density of image data represented by a correction target pixel is corrected such that the increase or decrease in the toner area coverage on the correction target pixel is compensated excluding a toner area coverage on the correction target pixel covered by a toner image that would be formed based on a color density of image data to be represented by a neighboring pixel of the correction target pixel. This effectively reduces banding noise on an output of the image data and prevents degradation in image quality.Type: GrantFiled: February 24, 2009Date of Patent: April 17, 2012Assignee: Ricoh Company, LimitedInventors: Makoto Higashiyama, Masashi Suzuki, Tomohide Kondoh
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Patent number: 7843604Abstract: A pattern generating unit generates correction patterns on a transfer belt. Detection sensors detect the correction patterns, and amounts of magnification correction, amounts of misregistration in the main- and the sub-scanning direction are calculated. The amount of skew between each of colors is then calculated, and a position where an image is divided and a direction for shifting a divided image are determined. Possible dividing-positions are also determined, and a calculated dividing position and each of the possible dividing positions are compared with one another. Then, a possible dividing position closest to the calculated dividing position is set as an actual dividing position.Type: GrantFiled: December 19, 2007Date of Patent: November 30, 2010Assignee: Ricoh Company, LimitedInventors: Makoto Higashiyama, Yoshiaki Kawai, Shingo Nishizaki, Tomohide Kondoh, Masashi Suzuki
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Publication number: 20100253981Abstract: An image forming apparatus includes a skew correcting unit that performs skew correction by dividing an input image that has undergone a halftone process into image data in a predetermined skew correction area in a main scanning direction and by shifting the image data in the skew correction area in a sub-scanning direction; an edge detecting unit that detects whether a pixel at a division position is an edge pixel based on concentrations of a set of pixels including the pixel at the division position; a correction area determining unit that, if detected that the pixel at the division position is the edge pixel, determines a correction area that is an area of pixels including the edge pixel to be subjected to concentration correction within the skew correction area; and an edge correcting unit that corrects concentrations of the pixels within the correction area.Type: ApplicationFiled: March 17, 2010Publication date: October 7, 2010Inventors: Makoto HIGASHIYAMA, Yoshiaki KAWAI, Shingo NISHIZAKI, Tomohide KONDOH, Masashi SUZUKI
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Patent number: 7734198Abstract: An image forming apparatus includes a rotating member that is rotatable, a communication medium, and a receiving unit. The communication medium that is attached to an outer circumference of the rotating member stores therein information on the rotating member and relays the information on the rotating member via wireless communication. The receiving unit receives the information on the rotating member from the communication medium.Type: GrantFiled: August 21, 2007Date of Patent: June 8, 2010Assignee: Ricoh Company, LimitedInventors: Makoto Higashiyama, Kazumasa Koike, Shingo Nishizaki, Kazuyuki Sato, Toyokazu Aoki, Masaki Tsugawa
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Publication number: 20090231606Abstract: An image forming apparatus capable of minimizing degradation in density correction as a part of skew correction includes a noise-occurrence determining unit, a correction-target-pixel selecting unit, a density correcting unit, and a phase correcting unit. When the noise-occurrence determining unit determines that noise would appear, the density correcting unit performs density correction on a correction target pixel that is determined by the correction-target-pixel selecting unit. The phase correcting unit corrects an output point in time of image data of the density-corrected correction target pixel in a pixel period during which the image data can be output so as to output the image data at a position displaced away from a shift position or toward a shift position.Type: ApplicationFiled: March 16, 2009Publication date: September 17, 2009Inventors: Yoshiaki KAWAI, Shingo NISHIZAKI, Makoto HIGASHIYAMA, Tomohide KONDOH, Masashi SUZUKI
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Publication number: 20090213401Abstract: An image forming apparatus capable of accurately compensating an increase or decrease of a toner area coverage resulting from shifting that is performed to correct skew is provided. A color density of image data represented by a correction target pixel is corrected such that the increase or decrease in the toner area coverage on the correction target pixel is compensated excluding a toner area coverage on the correction target pixel covered by a toner image that would be formed based on a color density of image data to be represented by a neighboring pixel of the correction target pixel. This effectively reduces banding noise on an output of the image data and prevents degradation in image quality.Type: ApplicationFiled: February 24, 2009Publication date: August 27, 2009Inventors: Makoto Higashiyama, Masashi Suzuki, Tomohide Kondoh
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Publication number: 20080174799Abstract: A pattern generating unit generates correction patterns on a transfer belt. Detection sensors detect the correction patterns, and amounts of magnification correction, amounts of misregistration in the main- and the sub-scanning direction are calculated. The amount of skew between each of colors is then calculated, and a position where an image is divided and a direction for shifting a divided image are determined. Possible dividing-positions are also determined, and a calculated dividing position and each of the possible dividing positions are compared with one another. Then, a possible dividing position closest to the calculated dividing position is set as an actual dividing position.Type: ApplicationFiled: December 19, 2007Publication date: July 24, 2008Inventors: Makoto Higashiyama, Yoshiaki Kawai, Shingo Nishizaki, Tomohide Kondoh, Masashi Suzuki
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Publication number: 20080044195Abstract: An image forming apparatus includes a rotating member that is rotatable, a communication medium, and a receiving unit. The communication medium that is attached to an outer circumference of the rotating member stores therein information on the rotating member and relays the information on the rotating member via wireless communication. The receiving unit receives the information on the rotating member from the communication medium.Type: ApplicationFiled: August 21, 2007Publication date: February 21, 2008Inventors: Makoto Higashiyama, Kazumasa Koike, Shingo Nishizaki, Kazuyuki Sato, Toyokazu Aoki, Masaki Tsugawa