Patents by Inventor Toshihito Kamei
Toshihito Kamei 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: 11179950Abstract: A liquid discharge apparatus includes a liquid discharge device, circuitry, and a curing device. The liquid discharge device is configured to discharge a liquid having a curing degree variable by a stimulation amount while relatively moving to a recording medium. The circuitry is configured to acquire surface roughness information indicating glossiness of a formed object formed on the recording medium and set a stimulation amount for the liquid based on the surface roughness information. The curing device is configured to stimulate the liquid discharged by the liquid discharge device based on the stimulation amount set by the circuitry to cure the liquid. The circuitry is configured to set, based on the surface roughness information, the stimulation amount for each region stimulated by the curing device in a same plane of the formed object.Type: GrantFiled: August 10, 2020Date of Patent: November 23, 2021Assignee: RICOH COMPANY, LTD.Inventors: Aya Yamasawa, Manabu Arita, Toshihito Kamei, Shinichi Hatanaka
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Publication number: 20200369046Abstract: A liquid discharge apparatus includes a liquid discharge device, circuitry, and a curing device. The liquid discharge device is configured to discharge a liquid having a curing degree variable by a stimulation amount while relatively moving to a recording medium. The circuitry is configured to acquire surface roughness information indicating glossiness of a formed object formed on the recording medium and set a stimulation amount for the liquid based on the surface roughness information. The curing device is configured to stimulate the liquid discharged by the liquid discharge device based on the stimulation amount set by the circuitry to cure the liquid. The circuitry is configured to set, based on the surface roughness information, the stimulation amount for each region stimulated by the curing device in a same plane of the formed object.Type: ApplicationFiled: August 10, 2020Publication date: November 26, 2020Inventors: Aya YAMASAWA, Manabu Arita, Toshihito KAMEI, Shinichi Hatanaka
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Patent number: 10780718Abstract: A liquid discharge apparatus includes a liquid discharge device, circuitry, and a curing device. The liquid discharge device is configured to discharge a liquid having a curing degree variable by a stimulation amount while relatively moving to a recording medium. The circuitry is configured to acquire surface roughness information indicating glossiness of a formed object formed on the recording medium and set a stimulation amount for the liquid based on the surface roughness information. The curing device is configured to stimulate the liquid discharged by the liquid discharge device based on the stimulation amount set by the circuitry to cure the liquid. The circuitry is configured to set, based on the surface roughness information, the stimulation amount for each region stimulated by the curing device in a same plane of the formed object.Type: GrantFiled: March 19, 2019Date of Patent: September 22, 2020Assignee: Ricoh Company, Ltd.Inventors: Aya Yamasawa, Manabu Arita, Toshihito Kamei, Shinichi Hatanaka
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Publication number: 20190299659Abstract: A liquid discharge apparatus includes a liquid discharge device, circuitry, and a curing device. The liquid discharge device is configured to discharge a liquid having a curing degree variable by a stimulation amount while relatively moving to a recording medium. The circuitry is configured to acquire surface roughness information indicating glossiness of a formed object formed on the recording medium and set a stimulation amount for the liquid based on the surface roughness information. The curing device is configured to stimulate the liquid discharged by the liquid discharge device based on the stimulation amount set by the circuitry to cure the liquid. The circuitry is configured to set, based on the surface roughness information, the stimulation amount for each region stimulated by the curing device in a same plane of the formed object.Type: ApplicationFiled: March 19, 2019Publication date: October 3, 2019Inventors: Aya YAMASAWA, Manabu ARITA, Toshihito KAMEI, Shinichi HATANAKA
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Patent number: 10083380Abstract: A calculating unit calculates, as a reference number N of scans, a sum by adding 1 to a product M of the number m of scans in a main-scanning direction and the number n of scans in a sub-scanning direction. An assigning unit assigns, as a count of scans indicating a scan order, an integer 1 or more and the product M or more to each pixel of a unit image. A changing unit changes the count of scans of some pixels to which a first scan is assigned to an N-th scan. The generating unit generates print data, in which nozzle groups from a nozzle group arranged on a downstream end in the sub-scanning direction to a nozzle group arranged on an upstream end are sequentially assigned to pixels from the pixels to which the first scan is assigned to the pixels to which the N-th scan is assigned.Type: GrantFiled: April 21, 2016Date of Patent: September 25, 2018Assignee: Ricoh Company, Ltd.Inventors: Masanori Hirano, Toshihito Kamei
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Publication number: 20180144218Abstract: A calculating unit calculates, as a reference number N of scans, a sum by adding 1 to a product M of the number m of scans in a main-scanning direction and the number n of scans in a sub-scanning direction. An assigning unit assigns, as a count of scans indicating a scan order, an integer 1 or more and the product M or more to each pixel of a unit image. A changing unit changes the count of scans of some pixels to which a first scan is assigned to an N-th scan. The generating unit generates print data, in which nozzle groups from a nozzle group arranged on a downstream end in the sub-scanning direction to a nozzle group arranged on an upstream end are sequentially assigned to pixels from the pixels to which the first scan is assigned to the pixels to which the N-th scan is assigned.Type: ApplicationFiled: April 21, 2016Publication date: May 24, 2018Applicant: Ricoh Company, Ltd.Inventors: Masanori HIRANO, Toshihito KAMEI
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Patent number: 9166018Abstract: When forming a p+ area and n+ area on the same surface of an n? semiconductor wafer, a first ion implantation forms the p+ area on the entire rear surface of the n? semiconductor wafer. Next, a resist mask selectively covering the rear surface of the n? semiconductor wafer is formed. With this resist mask as the mask, an n-type impurity is injected into the rear surface of the n? semiconductor wafer through a second ion implantation to form the n+ area on a portion deeper from the rear surface of the n? semiconductor wafer than the p+ type area. Thereafter, the n? semiconductor wafer is exposed to an oxygen (O2) gas atmosphere with fluorine (F) gas added to remove the resist mask and a silicon part between the rear surface of the n? semiconductor wafer in an FWD area not covered by the resist mask and the n+ area.Type: GrantFiled: May 9, 2014Date of Patent: October 20, 2015Assignee: FUJI ELECTRIC CO., LTD.Inventors: Toshihito Kamei, Seiji Noguchi
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Patent number: 9023692Abstract: IGBT and diode are formed with optimal electrical characteristics on the same semiconductor substrate. IGBT region and FWD region are provided on the same semiconductor substrate. There are a plurality of trenches at predetermined intervals in the front surface of an n? type semiconductor substrate, and P-type channel regions at predetermined intervals in the longitudinal direction of the trench between neighboring trenches, thereby configuring a MOS gate. The p-type channel region and n? type drift region are alternately disposed in longitudinal direction of the trench in the IGBT region. The p-type channel region and a p? type spacer region are alternately disposed in the longitudinal direction of the trench in the FWD region. Pitch in longitudinal direction of the trench of p-type channel region in the IGBT region is shorter than pitch in longitudinal direction of the trench of p-type channel region in the FWD region.Type: GrantFiled: September 12, 2013Date of Patent: May 5, 2015Assignee: Fuji Electric Co., Ltd.Inventors: Souichi Yoshida, Toshihito Kamei, Seiji Noguchi
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Patent number: 8985724Abstract: Disclosed is an image forming apparatus that includes a recording head for forming an image by discharging single color ink from plural nozzle sequences. The image forming apparatus includes a profile generating unit configured to generate a profile including discharging characteristics of the corresponding nozzle sequences and information indicating a positional relationship among the plural nozzle sequences, based on individual images of a predetermined pattern that have been formed by the corresponding nozzle sequences and images that have been formed by the nozzle sequences; and a driving condition determination unit configured to determine drive conditions of the corresponding nozzle sequences by referring to the profile.Type: GrantFiled: September 7, 2012Date of Patent: March 24, 2015Assignee: Ricoh Company, Ltd.Inventors: Yasunobu Takagi, Toshihito Kamei, Takashi Kimura, Yoshimi Nemoto
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Patent number: 8982420Abstract: An image processing method includes dividing a first image into regions according to content of the first image; generating a second image by converting a gradation of pixels of the first image into a gradation of pixels expressible in an image forming apparatus for each region; generating a piece of simulation information of a result of the image forming/outputting process based on the second image and nozzle characteristic information of the image forming apparatus; calculating an error between the first image and a third image for each of the regions, the third image being obtained by converting the piece of simulation information with the gradation of pixels of the first image; and deciding one of the second images as rendering information used to cause the image forming apparatus to perform an image forming/outputting process, based on the calculated errors between the first image and the third images.Type: GrantFiled: December 4, 2013Date of Patent: March 17, 2015Assignee: Ricoh Company, LimitedInventors: Yasunobu Takagi, Toshihito Kamei, Yoshiaki Hoshino, Taku Satoh
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Publication number: 20140377941Abstract: When forming a p+ area and n+ area on the same surface of an n? semiconductor wafer, a first ion implantation forms the p+ area on the entire rear surface of the n? semiconductor wafer. Next, a resist mask selectively covering the rear surface of the n? semiconductor wafer is formed. With this resist mask as the mask, an n-type impurity is injected into the rear surface of the n? semiconductor wafer through a second ion implantation to form the n+ area on a portion deeper from the rear surface of the n? semiconductor wafer than the p+ type area. Thereafter, the n? semiconductor wafer is exposed to an oxygen (O2) gas atmosphere with fluorine (F) gas added to remove the resist mask and a silicon part between the rear surface of the n? semiconductor wafer in an FWD area not covered by the resist mask and the n+ area.Type: ApplicationFiled: May 9, 2014Publication date: December 25, 2014Applicant: FUJI ELECTRIC CO., LTD.Inventors: Toshihito KAMEI, Seiji NOGUCHI
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Patent number: 8905512Abstract: An image forming apparatus that performs correction to make gradation values adding both of two head areas (A+C, B+D) approximately equal. An area whose density is the lowest is set as a target density. Assuming densities for head areas A=70, B=100, C=40, D=90, head areas B and D are corrected with correction amount that ?B become equal to ?D (?B=?D=40) in accordance with target value (A+C=100).Type: GrantFiled: August 7, 2013Date of Patent: December 9, 2014Assignee: Ricoh Company, Ltd.Inventors: Taku Satoh, Yasunobu Takagi, Toshihito Kamei, Takashi Kimura
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Patent number: 8804190Abstract: A method including the steps of obtaining an original image, generating a converted image by converting a gradation of a pixel of the original image into a prescribed gradations for an image forming apparatus to express, outputting a dot pattern image through a nozzle based on a predetermined dot pattern signal, generating nozzle characteristic information of the nozzle based on the dot pattern image, generating simulation information based on the converted image and the nozzle characteristic information, generating converted simulation information by converting the simulation information to the same gradation as that of the pixel of the original image, comparing the converted simulation information with the original image, and calculating an error between the original image and the converted simulation information.Type: GrantFiled: August 8, 2012Date of Patent: August 12, 2014Assignee: Ricoh Company, Ltd.Inventors: Yasunobu Takagi, Toshihito Kamei, Masanori Hirano
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Publication number: 20140153056Abstract: An image processing method includes dividing a first image into regions according to content of the first image; generating a second image by converting a gradation of pixels of the first image into a gradation of pixels expressible in an image forming apparatus for each region; generating a piece of simulation information of a result of the image forming/outputting process based on the second image and nozzle characteristic information of the image forming apparatus; calculating an error between the first image and a third image for each of the regions, the third image being obtained by converting the piece of simulation information with the gradation of pixels of the first image; and deciding one of the second images as rendering information used to cause the image forming apparatus to perform an image forming/outputting process, based on the calculated errors between the first image and the third images.Type: ApplicationFiled: December 4, 2013Publication date: June 5, 2014Inventors: Yasunobu TAKAGI, Toshihito Kamei, Yoshiaki Hoshino, Taku Satoh
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Patent number: 8684490Abstract: An image forming apparatus includes a joint head in which a plurality of heads, each having a plurality of nozzles, are arranged in a nozzle arranging direction, and end portions of the heads adjacent to each other overlap, an overlap processing unit that distributes recording dot pattern data used for forming dots by using nozzles of an overlapping portion of the heads out of recording dot pattern data to the nozzles of the recording head adjacent to each other, a first tone correcting unit that performs tone correction, by a first correction characteristic, on recording dot pattern data using the nozzles other than the overlapping portion, and a second tone correcting unit that performs tone correction by a second correction characteristic on recording dot pattern data by using the nozzles of the overlapping portion.Type: GrantFiled: December 12, 2011Date of Patent: April 1, 2014Assignee: Ricoh Company, LimitedInventors: Yasunobu Takagi, Toshihito Kamei, Takayuki Ito
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Patent number: 8684491Abstract: An image forming apparatus includes a recording head including a plurality of nozzles for ejecting recording liquid to perform image formation on a recording medium; and a correcting unit. The correcting unit is configured to divide the recording head by different division patterns each indicating that the recording head is divided into a plurality of segments by at least one different dividing point, correct input and output characteristics for each of the segments in each division pattern to calculate correction effect of the each division pattern, and determine one of the division patterns based on the calculated correction effects of the division patterns as a specified division pattern to correct input and output characteristics of the recording head.Type: GrantFiled: March 1, 2012Date of Patent: April 1, 2014Assignee: Ricoh Company, LimitedInventors: Yasunobu Takagi, Toshihito Kamei, Takashi Kimura, Taku Satoh
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Publication number: 20140070270Abstract: IGBT and diode are formed with optimal electrical characteristics on the same semiconductor substrate. IGBT region and FWD region are provided on the same semiconductor substrate. There are a plurality of trenches at predetermined intervals in the front surface of an n? type semiconductor substrate, and P-type channel regions at predetermined intervals in the longitudinal direction of the trench between neighboring trenches, thereby configuring a MOS gate. The p-type channel region and n? type drift region are alternately disposed in longitudinal direction of the trench in the IGBT region. The p-type channel region and a p? type spacer region are alternately disposed in the longitudinal direction of the trench in the FWD region. Pitch in longitudinal direction of the trench of p-type channel region in the IGBT region is shorter than pitch in longitudinal direction of the trench of p-type channel region in the FWD region.Type: ApplicationFiled: September 12, 2013Publication date: March 13, 2014Applicant: FUJI ELECTRIC CO., LTD.Inventors: Souichi YOSHIDA, Toshihito KAMEI, Seiji NOGUCHI
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Publication number: 20140043391Abstract: An image forming apparatus that performs correction to make gradation values adding both of two head areas (A+C, B+D) approximately equal. An area whose density is the lowest is set as a target density. Assuming densities for head areas A=70, B=100, C=40, D=90, head areas B and D are corrected with correction amount that ?B become equal to ?D (?B=?D=40) in accordance with target value (A+C=100).Type: ApplicationFiled: August 7, 2013Publication date: February 13, 2014Applicant: Ricoh Company, Ltd.Inventors: Taku SATOH, Yasunobu TAKAGI, Toshihito KAMEI, Takashi KIMURA
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Publication number: 20130063512Abstract: Disclosed is an image forming apparatus that includes a recording head for forming an image by discharging single color ink from plural nozzle sequences. The image forming apparatus includes a profile generating unit configured to generate a profile including discharging characteristics of the corresponding nozzle sequences and information indicating a positional relationship among the plural nozzle sequences, based on individual images of a predetermined pattern that have been formed by the corresponding nozzle sequences and images that have been formed by the nozzle sequences; and a driving condition determination unit configured to determine drive conditions of the corresponding nozzle sequences by referring to the profile.Type: ApplicationFiled: September 7, 2012Publication date: March 14, 2013Applicant: RICOH COMPANY, LTD.Inventors: Yasunobu TAKAGI, Toshihito KAMEI, Takashi KIMURA, Yoshimi NEMOTO
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Publication number: 20130057879Abstract: A method including the steps of obtaining an original image, generating a converted image by converting a gradation of a pixel of the original image into a prescribed gradations for an image forming apparatus to express, outputting a dot pattern image through a nozzle based on a predetermined dot pattern signal, generating nozzle characteristic information of the nozzle based on the dot pattern image, generating simulation information based on the converted image and the nozzle characteristic information, generating converted simulation information by converting the simulation information to the same gradation as that of the pixel of the original image, comparing the converted simulation information with the original image, and calculating an error between the original image and the converted simulation information.Type: ApplicationFiled: August 8, 2012Publication date: March 7, 2013Applicant: Ricoh Company, Ltd.Inventors: Yasunobu TAKAGI, Toshihito KAMEI, Masanori HIRANO