Patents by Inventor Yuugo Matsuura
Yuugo Matsuura 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: 11964496Abstract: An optical writing device, and a method of controlling the optical writing device. The optical writing device and the method includes controlling speed of operation of a light deflector based on image magnifying-power information in a sub-scanning direction parallel to a direction in which a surface of a photoconductor moves, and controlling a prescribed write clock frequency such that a number of clock pulses of write light will become a target number of pulses over a period where the write light scans an area within a prescribed distance in a main scanning direction, the target number of pulses being maintained even when the speed of operation of the light deflector is changed in the controlling the speed of operation of the light deflector. The write clock frequency controller maintains the target number of pulses even when the speed of operation of the light deflector is changed by the light-deflector controller.Type: GrantFiled: March 3, 2022Date of Patent: April 23, 2024Assignee: Ricoh Company, Ltd.Inventor: Yuugo Matsuura
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Publication number: 20220317440Abstract: An optical writing device, and a method of controlling the optical writing device. The optical writing device and the method includes controlling speed of operation of a light deflector based on image magnifying-power information in a sub-scanning direction parallel to a direction in which a surface of a photoconductor moves, and controlling a prescribed write clock frequency such that a number of clock pulses of write light will become a target number of pulses over a period where the write light scans an area within a prescribed distance in a main scanning direction, the target number of pulses being maintained even when the speed of operation of the light deflector is changed in the controlling the speed of operation of the light deflector. The write clock frequency controller maintains the target number of pulses even when the speed of operation of the light deflector is changed by the light-deflector controller.Type: ApplicationFiled: March 3, 2022Publication date: October 6, 2022Applicant: Ricoh Company, Ltd.Inventor: Yuugo Matsuura
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Patent number: 10089559Abstract: A scanner includes: an acquiring unit that acquires determination result information based on a determination result of whether a target dot of a target pixel of a plurality of pixels constituting image data is a first dot or a second dot; a light source control unit that, if the target dot is the first dot, causes a light source to emit a light beam during a corrected lighting time with a light source characteristic time based on a characteristic of the light source being added to a predetermined lighting time that is preliminarily determined with respect to the target dot, and if the target dot is the second dot, causes the light source to emit a light beam during the predetermined lighting time; and a deflecting unit that deflects the light beam in the main scanning direction.Type: GrantFiled: March 7, 2016Date of Patent: October 2, 2018Assignee: RICOH COMPANY, LTD.Inventors: Katsuhiko Maeda, Takuma Nishio, Yuugo Matsuura
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Patent number: 10073371Abstract: An image forming apparatus includes a photoconductor, a light source, an optical scanning device, an image bearer, an image density sensor, an image processing circuit, and a light source driver. The plurality of images are formed with a plurality of light intensities and a plurality of image area rates on the image bearer. The image density sensor detects a plurality of image densities of the plurality of images at a plurality of positions in a main scanning direction. The image processing circuit determines a light intensity correction value to correct an image density of a target image in the main scanning direction based on the plurality of light intensities, image area rates, image densities, and positions, and the image area rate of the target image, and outputs a control signal to adjust a light intensity. The light source driver adjusts the light intensity based on the control signal.Type: GrantFiled: July 21, 2017Date of Patent: September 11, 2018Assignee: RICOH COMPANY, LTD.Inventors: Yuugo Matsuura, Kohei Matsumoto
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Publication number: 20180059569Abstract: An image forming apparatus includes a photoconductor, a light source, an optical scanning device, an image bearer, an image density sensor, an image processing circuit, and a light source driver. The plurality of images are formed with a plurality of light intensities and a plurality of image area rates on the image bearer. The image density sensor detects a plurality of image densities of the plurality of images at a plurality of positions in a main scanning direction. The image processing circuit determines a light intensity correction value to correct an image density of a target image in the main scanning direction based on the plurality of light intensities, image area rates, image densities, and positions, and the image area rate of the target image, and outputs a control signal to adjust a light intensity. The light source driver adjusts the light intensity based on the control signal.Type: ApplicationFiled: July 21, 2017Publication date: March 1, 2018Applicant: Ricoh Company, Ltd.Inventors: Yuugo MATSUURA, Kohei MATSUMOTO
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Publication number: 20160275381Abstract: A scanner includes: an acquiring unit that acquires determination result information based on a determination result of whether a target dot of a target pixel of a plurality of pixels constituting image data is a first dot or a second dot; a light source control unit that, if the target dot is the first dot, causes a light source to emit a light beam during a corrected lighting time with a light source characteristic time based on a characteristic of the light source being added to a predetermined lighting time that is preliminarily determined with respect to the target dot, and if the target dot is the second dot, causes the light source to emit a light beam during the predetermined lighting time; and a deflecting unit that deflects the light beam in the main scanning direction.Type: ApplicationFiled: March 7, 2016Publication date: September 22, 2016Inventors: Katsuhiko MAEDA, Takuma NISHIO, Yuugo MATSUURA
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Patent number: 9332655Abstract: An electronic circuit having an electronic component mounted on a substrate, a light source device having the electronic circuit, and a method of manufacturing the electronic circuit on which the electronic component is mounted on the substrate are described. The electronic component has a plurality of lead pins to be electrically connected to wirings on the substrate. The substrate is formed with a hole having a larger dimension than a maximum distance between at least two lead pins of the lead pins. The lead pins are inserted into the hole from sides of tips of the lead pins while being bent at a plurality of bending portions, and fixed to the substrate by a solder.Type: GrantFiled: December 23, 2013Date of Patent: May 3, 2016Assignee: Ricoh Company, Ltd.Inventors: Hiroyuki Basho, Katsuhiko Maeda, Masashi Suzuki, Yuugo Matsuura
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Patent number: 9310708Abstract: An optical scanning device includes a light source emitting light to form an image by optical scanning; and a control section generating a control signal, which is for turning on and off the light source, based on an image signal. Further, the control section generates a pulse signal having a predetermined time width when the image signal indicates that the light source is to be turned off.Type: GrantFiled: July 18, 2014Date of Patent: April 12, 2016Assignee: Ricoh Company, Ltd.Inventors: Katsuhiko Maeda, Tadashi Shinohara, Yuugo Matsuura
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Patent number: 9063455Abstract: A light-emitting substrate including: a first and second light-emitting devices each including terminals; and a substrate including a first hole and a second hole, the first hole and the second hole respectively having at least one receiving portion, wherein the receiving portion of the first hole receives the terminal of the first light-emitting device, and the receiving portion of the second hole receives the terminal of the second light-emitting device, a first line drawn through a center of the receiving portion of the first hole and a center of the first hole, and a second line drawn through a center of the receiving portion of the second hole and a center of the second hole are not aligned in line.Type: GrantFiled: August 12, 2013Date of Patent: June 23, 2015Assignee: RICOH COMPANY, LIMITEDInventors: Katsuhiko Maeda, Hiroyuki Basho, Masashi Suzuki, Yuugo Matsuura
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Publication number: 20150054902Abstract: An optical scanning device includes a light source emitting light to form an image by optical scanning; and a control section generating a control signal, which is for turning on and off the light source, based on an image signal. Further, the control section generates a pulse signal having a redetermined time width when the image signal indicates that the light source is to be turned off.Type: ApplicationFiled: July 18, 2014Publication date: February 26, 2015Applicant: RICOH COMPANY, LTD.Inventors: Katsuhiko MAEDA, Tadashi SHINOHARA, Yuugo MATSUURA
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Publication number: 20140198469Abstract: An electronic circuit having an electronic component mounted on a substrate, a light source device having the electronic circuit, and a method of manufacturing the electronic circuit on which the electronic component is mounted on the substrate are described. The electronic component has a plurality of lead pins to be electrically connected to wirings on the substrate. The substrate is formed with a hole having a larger dimension than a maximum distance between at least two lead pins of the lead pins. The lead pins are inserted into the hole from sides of tips of the lead pins while being bent at a plurality of bending portions, and fixed to the substrate by a solder.Type: ApplicationFiled: December 23, 2013Publication date: July 17, 2014Inventors: Hiroyuki BASHO, Katsuhiko MAEDA, Masashi SUZUKI, Yuugo MATSUURA
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Publication number: 20140063168Abstract: A light-emitting substrate including: a first and second light-emitting devices each including terminals; and a substrate including a first hole and a second hole, the first hole and the second hole respectively having at least one receiving portion, wherein the receiving portion of the first hole receives the terminal of the first light-emitting device, and the receiving portion of the second hole receives the terminal of the second light-emitting device, a first line drawn through a center of the receiving portion of the first hole and a center of the first hole, and a second line drawn through a center of the receiving portion of the second hole and a center of the second hole are not aligned in line.Type: ApplicationFiled: August 12, 2013Publication date: March 6, 2014Inventors: Katsuhiko MAEDA, Hiroyuki Basho, Masashi Suzuki, Yuugo Matsuura