Patents by Inventor Jun Nakagawa
Jun Nakagawa 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: 10816887Abstract: A control device includes an acquirer, a timing detector, a controller, and a driver. The acquirer acquires an output voltage from a light detector for receiving laser light scanned by a light source and a deflector. The timing detector detects reference timings of the laser light on forward and backward paths in a scanning direction based on the output voltage. The controller generates a control signal for causing the light source and the deflector to draw a forward path image on a scanned surface from time obtained by adding a time to the reference timing on the forward path and to draw a backward path image on the surface from time obtained by adding a time to the reference timing on the backward path. The driver draws the images by driving the deflector, based on the control signal.Type: GrantFiled: June 14, 2017Date of Patent: October 27, 2020Assignee: Ricoh Company, Ltd.Inventors: Jun Nakagawa, Toshihiro Yamashiro, Takayuki Shitomi
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Patent number: 10792931Abstract: An optical deflection apparatus includes a mirror unit, a pair of elastic supporting units configured to rotatably support the mirror unit around a predetermined axis, at least one drive unit configured to elastically deform the pair of elastic supporting units, and a drive control unit configured to input a drive frequency into the at least one drive unit so as to control the at least one drive unit, wherein a first time interval at which the drive control unit changes the drive frequency in a first temperature range is shorter than a second time interval at which the drive control unit changes the drive frequency in a second temperature range, the second temperature range being at a higher temperature than the first temperature range.Type: GrantFiled: June 12, 2018Date of Patent: October 6, 2020Assignee: Ricoh Company, Ltd.Inventors: Jun Nakagawa, Toshihiro Yamashiro
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Publication number: 20200174358Abstract: A control device (10) includes an acquirer (32), a timing detector (33), a controller (30), and a driver (31). The acquirer (32) is configured to acquire an output voltage from a light detector (16) for receiving laser light scanned by a light source (12) and a deflector (13). The timing detector (33) is configured to detect reference timings of the laser light on forward and backward paths in a scanning direction based on the output voltage. The controller (30) is configured to generate a control signal for causing the light source (12) and the deflector (13) to draw a forward path image on a scanned surface from time obtained by adding a time to the reference timing on the forward path and to draw a backward path image on the surface from time obtained by adding a time to the reference timing on the backward path. The driver (31) is configured to draw the images by driving the deflector (13), based on the control signal.Type: ApplicationFiled: June 14, 2017Publication date: June 4, 2020Inventors: Jun NAKAGAWA, Toshihiro YAMASHIRO, Takayuki SHITOMI
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Publication number: 20190345878Abstract: This diesel engine (10) has an engine body (11), an EGR device (12), and a control unit (13). The engine body (11) has combustion chambers (15) and injectors (16). The EGR device (12) is provided with: a gas flow path (35) that returns a portion of exhaust gas from the combustion chambers (15) to an intake flow path (17); and an EGR device (37) that has a butterfly valve (42). When the butterfly valve (42) is set to a rotation angle position of 0° when in a closed posture (42A), the control unit (13) drives the butterfly valve (42) within a first rotation angle range of no less than 0° when the injection amount of fuel to be injected by the injectors (16) is no less than a predetermined threshold, and the control unit (13) drives the butterfly valve (42) within a second rotation angle range that passes through 0° when the injection amount is less than the threshold. The threshold is a value greater than zero.Type: ApplicationFiled: September 14, 2017Publication date: November 14, 2019Inventors: Yutaka MASHIMA, Etsuo KIJIMA, Yasuhiko MORII, Jun NAKAGAWA, Tomohiro ITOU, Mitsuru ISHIMOTO, Yuichi KAWAAI
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Patent number: 10459218Abstract: An optical deflector is used for optically scanning a target surface. The optical deflector includes: a mirror device configured to include a mirror capable of oscillating; and a casing configured to include a window unit for facing the mirror device, and to accommodate the mirror device. The window unit has a transmissive reflection structure in which part of an incident beam is caused to transmit through the window unit toward the mirror, and at least part of a remainder of the incident beam is reflected by the window unit to a direction separated from an optical deflection range that is deflected by the mirror device, and the transmissive reflection structure includes a diffraction grating provided on one of a front surface and a back surface of the window unit.Type: GrantFiled: June 2, 2017Date of Patent: October 29, 2019Assignee: RICOH COMPANY, LTD.Inventors: Shuichi Suzuki, Tsuyoshi Hashiguchi, Jun Nakagawa
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Patent number: 10429638Abstract: A control unit to control a movement of a reflector includes a drive signal output unit to apply a drive voltage having a minimum value and a maximum value in one cycle to a piezoelectric element to deform the piezoelectric element, the deformation of the piezoelectric element causing the reflector to move, and circuitry to control the drive voltage to have the minimum value greater than a zero voltage by a given difference value.Type: GrantFiled: March 15, 2017Date of Patent: October 1, 2019Assignee: RICOH COMPANY, LTD.Inventors: Tsuyoshi Hashiguchi, Jun Nakagawa, Shuichi Suzuki
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Publication number: 20180290460Abstract: An optical deflection apparatus includes a mirror unit, a pair of elastic supporting units configured to rotatably support the mirror unit around a predetermined axis, at least one drive unit configured to elastically deform the pair of elastic supporting units, and a drive control unit configured to input a drive frequency into the at least one drive unit so as to control the at least one drive unit, wherein a first time interval at which the drive control unit changes the drive frequency in a first temperature range is shorter than a second time interval at which the drive control unit changes the drive frequency in a second temperature range, the second temperature range being at a higher temperature than the first temperature range.Type: ApplicationFiled: June 12, 2018Publication date: October 11, 2018Applicant: Ricoh Company, Ltd.Inventors: Jun NAKAGAWA, Toshihiro YAMASHIRO
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Patent number: 10050270Abstract: A lithium-ion secondary battery including positive and negative electrodes, a separator element, an electrical conductor element and a binder, wherein the positive electrode includes a lithium-containing metal phosphate compound coated with a carbon material having at least one phase selected from a graphene phase and an amorphous phase, and further includes carbon black and a fibrous carbon material and wherein the negative-electrode material includes a graphite carbon material having at least one carbon phase selected from a graphene phase and an amorphous phase, and further includes carbon black and a fibrous carbon material, and wherein the binder includes a water-soluble synthetic resin or a water-dispersible synthetic resin. The most preferred positive electrode includes LiFePO4, The most preferred negative electrode includes artificial graphite or graphitazable powder. The most preferred binder is carboxyl methyl cellulose further including a surface active agent.Type: GrantFiled: May 6, 2013Date of Patent: August 14, 2018Assignee: HYDRO-QUEBECInventors: Karim Zaghib, Shinji Saito, Abdelbast Guerfi, Takehiko Sawai, Kazunori Urao, Jun Nakagawa, Francis Barray, Joël Fréchette
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Publication number: 20170324089Abstract: The present invention provides an electrode material, for a lithium battery, which is capable of achieving a high-energy density and a high output and continuing its properties for many years, a method of producing the electrode material, and the lithium battery. The electrode material for use in positive and negative electrodes of a lithium battery is formed as a complex by combining a carbon-based conductive material and an electrode active material with each other. The carbon-based conductive material of the electrode material is subjected to hydrophilic treatment by using a gas containing fluorine gas. The electrode material is formed as the complex by calcining a mixture of the carbon-based conductive material subjected to the hydrophilic treatment and the electrode active material in the presence of fluororesin.Type: ApplicationFiled: November 30, 2016Publication date: November 9, 2017Inventors: Takehiko SAWAI, Shinji SAITO, Kazunori URAO, Jun NAKAGAWA, Kazuma HANAI
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Publication number: 20170269354Abstract: An optical deflector is used for optically scanning a target surface. The optical deflector includes: a mirror device configured to include a mirror capable of oscillating; and a casing configured to include a window unit for facing the mirror device, and to accommodate the mirror device. The window unit has a transmissive reflection structure in which part of an incident beam is caused to transmit through the window unit toward the mirror, and at least part of a remainder of the incident beam is reflected by the window unit to a direction separated from an optical deflection range that is deflected by the mirror device, and the transmissive reflection structure includes a diffraction grating provided on one of a front surface and a back surface of the window unit.Type: ApplicationFiled: June 2, 2017Publication date: September 21, 2017Inventors: Shuichi SUZUKI, Tsuyoshi Hashiguchi, Jun Nakagawa
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Publication number: 20170269352Abstract: A control unit to control a movement of a reflector includes a drive signal output unit to apply a drive voltage having a minimum value and a maximum value in one cycle to a piezoelectric element to deform the piezoelectric element, the deformation of the piezoelectric element causing the reflector to move, and circuitry to control the drive voltage to have the minimum value greater than a zero voltage by a given difference value.Type: ApplicationFiled: March 15, 2017Publication date: September 21, 2017Applicant: RICOH COMPANY, LTD.Inventors: Tsuyoshi HASHIGUCHI, Jun NAKAGAWA, Shuichi SUZUKI
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Patent number: 9766450Abstract: A light deflector is provided including a mirror unit having a light reflection plane, a movable frame to support the mirror unit, a support frame disposed to surround the movable frame, a pair of serpentine beams each disposed between the movable frame and the support frame on both sides of the movable frame to form a turning shape, each of the serpentine beams having one end attached to the support frame, and another end attached to the movable frame, and a vibration damper provided on a portion that moves due to deformation of the serpentine beams caused by application of voltage being transferred.Type: GrantFiled: October 1, 2015Date of Patent: September 19, 2017Assignee: Ricoh Company, Ltd.Inventors: Jun Nakagawa, Tsuyoshi Hashiguchi, Eri Watanabe, Goichi Akanuma, Tomofumi Kitazawa
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Patent number: 9740185Abstract: A peripheral device for a programmable controller includes a display unit; a program storage unit; a history information storage unit storing history information that is arithmetic processing information during execution of the user program in the programmable controller and recorded under a predetermined condition; a program display processing unit displaying a designated user program in a user program display area; a trend graph display processing unit displaying a first trend graph obtained by graphing first history information corresponding to the designated user program and a cursor indicating a position on the first trend graph, in a trend graph display area; and a cursor information acquisition unit acquiring a cursor position and acquiring arithmetic processing information corresponding to the cursor position from the first history information, wherein the program display processing unit displays the arithmetic processing information over the user program in the user program display area.Type: GrantFiled: April 12, 2013Date of Patent: August 22, 2017Assignee: Mitsubishi Electric CorporationInventor: Jun Nakagawa
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Publication number: 20170084920Abstract: The present invention provides an electrode material, for a lithium battery, which is capable of achieving a high-energy density and a high output and continuing its properties for many years, a method of producing the electrode material, and the lithium battery. The electrode material for use in positive and negative electrodes of a lithium battery is formed as a complex by combining a carbon-based conductive material and an electrode active material with each other. The carbon-based conductive material of the electrode material is subjected to hydrophilic treatment by using a gas containing fluorine gas. The electrode material is formed as the complex by calcining a mixture of the carbon-based conductive material subjected to the hydrophilic treatment and the electrode active material in the presence of fluororesin.Type: ApplicationFiled: November 30, 2016Publication date: March 23, 2017Inventors: Takehiko SAWAI, Shinji SAITO, Kazunori URAO, Jun NAKAGAWA, Kazuma HANAI
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Publication number: 20160109697Abstract: A light deflector is provided including a mirror unit having a light reflection plane, a movable frame to support the mirror unit, a support frame disposed to surround the movable frame, a pair of serpentine beams each disposed between the movable frame and the support frame on both sides of the movable frame to form a turning shape, each of the serpentine beams having one end attached to the support frame, and another end attached to the movable frame, and a vibration damper provided on a portion that moves due to deformation of the serpentine beams caused by application of voltage being transferredType: ApplicationFiled: October 1, 2015Publication date: April 21, 2016Inventors: Jun NAKAGAWA, Tsuyoshi HASHIGUCHI, Eri WATANABE, Goichi AKANUMA, Tomofumi KITAZAWA
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Patent number: 9257239Abstract: An object of the invention is to provide an electrode material slurry for preparation of lithium-ion secondary batteries favorable in properties and superior in storage stability and an aqueous binder composition for lithium-ion secondary batteries that can be used for production of lithium-ion secondary batteries superior in discharge rate characteristics and cycle characteristics. Provided is a binder composition for lithium-ion secondary battery electrode, comprising polymer particles containing (a) an ethylenic unsaturated carboxylic ester compound and (b) an ethylenic unsaturated sulfonic acid compound at a (a)/(b) mass ratio of (98 to 91)/(2 to 9) in a total (a) and (b) amount of 70 mass % or more, based on the monomeric raw materials.Type: GrantFiled: November 2, 2012Date of Patent: February 9, 2016Assignees: DENKA COMPANY LIMITED, SEI CORPORATIONInventors: Hironori Konishi, Daisuke Shimiya, Kazuhiro Kote, Takehiko Sawai, Shinji Saito, Jun Nakagawa
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Publication number: 20160033953Abstract: A peripheral device for a programmable controller includes a display unit; a program storage unit; a history information storage unit storing history information that is arithmetic processing information during execution of the user program in the programmable controller and recorded under a predetermined condition; a program display processing unit displaying a designated user program in a user program display area; a trend graph display processing unit displaying a first trend graph obtained by graphing first history information corresponding to the designated user program and a cursor indicating a position on the first trend graph, in a trend graph display area; and a cursor information acquisition unit acquiring a cursor position and acquiring arithmetic processing information corresponding to the cursor position from the first history information, wherein the program display processing unit displays the arithmetic processing information over the user program in the user program display area.Type: ApplicationFiled: April 12, 2013Publication date: February 4, 2016Applicant: Mitsubishi Electric CorporationInventor: Jun NAKAGAWA
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Publication number: 20150162610Abstract: A lithium-ion secondary battery including positive and negative electrodes, a separator element, an electrical conductor element and a binder, wherein the positive electrode includes a lithium-containing metal phosphate compound coated with a carbon material having at least one phase selected from a graphene phase and an amorphous phase, and further includes carbon black and a fibrous carbon material and wherein the negative-electrode material includes a graphite carbon material having at least one carbon phase selected from a graphene phase and an amorphous phase, and further includes carbon black and a fibrous carbon material, and wherein the binder includes a water-soluble synthetic resin or a water-dispersible synthetic resin. The most preferred positive electrode includes LiFePO4. The most preferred negative electrode includes artificial graphite or graphitazable powder. The most preferred binder is carboxyl methyl cellulose further including a surface active agent.Type: ApplicationFiled: May 6, 2013Publication date: June 11, 2015Applicants: Hydro-Québec, SEI CorporationInventors: Karim Zaghib, Shinji Saito, Abdelbast Guerfi, Takehiko Sawai, Kazunori Urao, Jun Nakagawa, Francis Barray, Joël Fréchette
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Patent number: 8897614Abstract: An electro-optical element includes a core layer made of an electro-optical material, a clad structure disposed on each of opposite sides of the core layer and configured to form an optical waveguide together with the core layer, and a pair of electrode layers, one of which being disposed on one side of the clad structure and another being disposed on another side of the clad structure. The clad structure includes a first clad layer and a second layer. The second clad layer has a dielectric permittivity larger than that of the first clad layer, and the second clad layer has a thickness thicker than that of the first clad layer.Type: GrantFiled: August 25, 2010Date of Patent: November 25, 2014Assignee: Ricoh Company, Ltd.Inventors: Shuichi Suzuki, Atsushi Sakai, Koichiro Nakamura, Jun Nakagawa
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Patent number: RE49319Abstract: A lithium-ion secondary battery including positive and negative electrodes, a separator element, an electrical conductor element and a binder, wherein the positive electrode includes a lithium-containing metal phosphate compound coated with a carbon material having at least one phase selected from a graphene phase and an amorphous phase, and further includes carbon black and a fibrous carbon material and wherein the negative-electrode material includes a graphite carbon material having at least one carbon phase selected from a graphene phase and an amorphous phase, and further includes carbon black and a fibrous carbon material, and wherein the binder includes a water-soluble synthetic resin or a water-dispersible synthetic resin. The most preferred positive electrode includes LiFePO4, The most preferred negative electrode includes artificial graphite or graphitazable powder. The most preferred binder is carboxyl methyl cellulose further including a surface active agent.Type: GrantFiled: March 3, 2020Date of Patent: November 29, 2022Assignee: HYDRO-QUEBECInventors: Karim Zaghib, Shinji Saito, Abdelbast Guerfi, Takehiko Sawai, Kazunori Urao, Jun Nakagawa, Francis Barray, Joel Frechette