Patents by Inventor Koichi Akiyama
Koichi Akiyama 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: 11970084Abstract: A vehicle drive device and a control method therefor are provided. The vehicle drive device includes: a power source including a first rotating electrical machine; a second rotating electrical machine; a differential unit including three rotating elements to which a first output shaft, a second output shaft, and the second rotating electrical machine are connected; and an electronic control device. The electronic control device regeneratively controls the first rotating electrical machine and the second rotating electrical machine in such a manner that negative torque is applied to the first output shaft and the second output shaft, when performing regenerative control by the second rotating electrical machine in a drive mode in which torque from the power source is distributed to the first output shaft and the second output shaft by controlling torque of the second rotating electrical machine during deceleration of a vehicle.Type: GrantFiled: February 11, 2022Date of Patent: April 30, 2024Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Atsushi Tabata, Koichi Okuda, Koji Takaira, Yuki Makino, Akinori Homan, Yosuke Akiyama, Akira Ijichi, Kunihiko Usui
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Patent number: 11971579Abstract: A multi-mode interferometric optical waveguide device includes: a multi-mode interferometric optical waveguide which includes a first reflective surface; a first single-mode waveguide connected to the multi-mode interferometric optical waveguide; and a second single-mode waveguide connected to the multi-mode interferometric optical waveguide and oppose the first reflective surface. Consequently, the multi-mode interferometric optical waveguide device can propagate light from the first single-mode waveguide to the second single-mode waveguide, with further reduced optical losses.Type: GrantFiled: October 10, 2018Date of Patent: April 30, 2024Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Masakazu Takabayashi, Kenichi Abe, Satoshi Nishikawa, Koichi Akiyama
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Publication number: 20240122503Abstract: A component measurement device for measuring a given component contained in a sample. The component measurement device includes an excitation light source to emit excitation light onto the optical medium portion, a probe light source to emit probe light onto the optical medium portion, an intensity modulation unit to perform intensity modulation on the excitation light emitted by the excitation light source based on stratum corneum information about stratum corneum of the sample to generate intensity-modulated excitation light and emit the generated intensity-modulated excitation light onto the optical medium portion, and a measurement unit to measure the given component based on a difference between the probe light emitted from the optical medium portion in a first state where the excitation light is emitted and the probe light emitted from the optical medium portion in a second state where the intensity-modulated excitation light is emitted.Type: ApplicationFiled: March 3, 2021Publication date: April 18, 2024Applicant: Mitsubishi Electric CorporationInventors: Yuki TSUDA, Shusaku HAYASHI, Koichi AKIYAMA
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Publication number: 20240123979Abstract: An automatic brake control apparatus to be applied to a vehicle is configured to: detect, with an ultrasonic sensor, a position of an obstacle on reverse travel of the vehicle, in which the ultrasonic sensor is disposed in a rear part of the vehicle; set a brake operation area on plane coordinates corresponding to the detected position by the ultrasonic sensor; and actuate an automatic brake. The brake operation area includes a low-speed operation area and a high-speed operation area. The low-speed operation area is set on the reverse travel at a lower speed than a setting vehicle speed, and the high-speed operation area is set on the reverse travel at a higher speed than the setting vehicle speed. The high-speed operation area is wider than the low-speed operation area at least in a vehicle widthwise direction.Type: ApplicationFiled: December 28, 2023Publication date: April 18, 2024Inventors: Yuna AKIYAMA, Koichi MIZUTANI, Masayoshi KOIJI, Yusuke HAMADA, Kazuki MUTO, Tsubasa TAKASE
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Patent number: 11951692Abstract: The purpose of the present invention is to provide a fiber-reinforced resin material having minimal directionality of strength as well as excellent productivity, a method and device for manufacturing a fiber-reinforced resin material whereby a molded article is obtained, and a device for inspecting a fiber bundle group. A method for manufacturing a sheet-shaped fiber-reinforced resin material in which a paste (P1) is impregnated between cut fiber bundles (CF), the method for manufacturing a fiber-reinforced resin material including a coating step applying a coating of a paste (P1) on a first sheet (S11) conveyed in a predetermined direction, a cutting step for cutting a long fiber bundle (CF) using a cutter (113A), a scattering step for dispersing the cut fiber bundles (CF) and scattering the cut fiber bundles (CF) on the paste (P1), and an impregnation step for pressing a fiber bundle group (F1) and the paste (P1) on the first sheet (S11) and impregnating the paste (P1) between the fiber bundles (CF).Type: GrantFiled: January 18, 2023Date of Patent: April 9, 2024Assignee: Mitsubishi Chemical CorporationInventors: Hiroshi Iwata, Nobuyuki Yamamoto, Hajime Okutsu, Ryuichi Ishikawa, Koichi Akiyama, Takayuki Kobayashi
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Publication number: 20240101807Abstract: Provided are a flame retardant composition for expandable styrene resin that can be used to produce a foamed molded article having excellent flame retardancy and excellent heat resistance, a flame-retardant expandable styrene-based resin composition, and an extrusion-foamed molded article of the styrene-based resin compostion. The flame retardant composition for expandable styrene resin of the present invention comprises at least tetrabromobisphenol A-bis(2,3-dibromo-2-methylpropyl ether) as a component (B1), fatty acid zinc as a component (C), and a fatty acid metal salt, excluding the component (C), as a component (D), the component (C) being contained in an amount of 0.1 to 15 parts by mass based on 100 parts by mass of the component (B1), and the component (D) being contained in an amount of 1 to 35 parts by mass based on 100 parts by mass of the component (B1).Type: ApplicationFiled: January 14, 2022Publication date: March 28, 2024Applicant: DKS Co. Ltd.Inventors: Ken MORISHITA, Koichi AKIYAMA, Ginga HOSHI
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Publication number: 20240080420Abstract: An illuminator includes a first light source that emits first light, a second light source that emits second light, a light combining member that combines the first light and the second light, a light diffuser that diffuses combined light, a light collector that is disposed between the light combining member and the light diffuser and directs the combined light toward the light diffuser, and a collimator that parallelizes the combined light emitted from the light diffuser. The light diffuser includes a diffusion plate having a diffusion surface that diffusively reflects the combined light, and a driver that rotates the diffusion plate. The diffusion surface inclines with respect to the optical axis of the light collector. An incidence position where the chief ray of the combined light is incident on the light collector is shifted with respect to the optical axis toward the side where the collimator is disposed.Type: ApplicationFiled: September 6, 2023Publication date: March 7, 2024Applicant: SEIKO EPSON CORPORATIONInventor: Koichi AKIYAMA
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Patent number: 11911945Abstract: Provided are an injection molding machine and an injection molding method. An injection molding machine includes: a plasticizing unit which rotates a screw to plasticize a molding material inside a plastication cylinder, and an injection unit. The injection unit has: a plunger reciprocally moving inside an injection chamber, and an injection driving device reciprocally moving the plunger. By driving the injection driving device to move the plunger backward and forward inside the injection chamber, and driving a rotary driving device to alternately rotate the screw in a normal rotation direction and a reverse rotation direction, the molding material is controlled to reciprocate between the plastication cylinder and the injection chamber.Type: GrantFiled: July 19, 2021Date of Patent: February 27, 2024Assignee: Sodick Co., Ltd.Inventors: Yoshikazu Kubo, Hisakazu Araki, Koichi Hirota, Kenzo Akiyama
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Publication number: 20240004280Abstract: A wavelength converter includes, a first optical member including a first optical layer that transmits first light, a wavelength conversion layer that is disposed at a substrate, has a light incident surface, and converts the first light into second light, a light emitting portion, and a second optical member disposed at the light emitting portion and including a second optical layer that reflects the first light and transmits the second light. The first optical layer inclines with respect to the light incident surface and reflects the second light. The wavelength conversion layer includes a first layer that the first light having passed through the first optical layer enters, and a second layer which the first light having passed through the first layer enters. The second layer scatters the first light by a degree greater than the degree by which the first layer scatters the first light.Type: ApplicationFiled: June 29, 2023Publication date: January 4, 2024Inventor: Koichi AKIYAMA
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Patent number: 11832942Abstract: A biological material measuring apparatus includes an infrared light source unit to radiate infrared light in entirety or part of a wavelength region including absorption wavelengths of a biological material, a prism to cause the infrared light radiated from the infrared light source unit to pass therethrough and emit the infrared light to a living body surface while being in contact with the living body surface, a light source to radiate light of a wavelength in a visible light region or a near infrared region to the prism, and a light position detector to detect a path of light from the light source by detecting light from the light source which is emitted from the prism.Type: GrantFiled: February 2, 2018Date of Patent: December 5, 2023Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Kosuke Shinohara, Kentaro Enoki, Koichi Akiyama, Shimpei Ogawa, Daisuke Fujisawa
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Publication number: 20230305375Abstract: A light source device includes a substrate having a supporting surface, a light source emitting first light, a first optical member having a first optical layer facing the supporting surface and reflecting the first light, a first wavelength conversion layer disposed on the supporting surface, a second wavelength conversion layer disposed at a first wavelength conversion layer side, and a light emitting portion formed by at least the substrate and the first optical member. The first optical layer is inclined with respect to the supporting surface and further reflects the second and third lights. The second wavelength conversion layer converts a part of the first light emitted from the light source into third light. The first wavelength conversion layer converts a part of the first light emitted from the second wavelength conversion layer into second light. The light emitting portion emits the first, second, and third lights.Type: ApplicationFiled: March 24, 2023Publication date: September 28, 2023Inventor: Koichi AKIYAMA
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Publication number: 20230305374Abstract: A light source device includes a substrate having a supporting surface, a first light source disposed at the substrate and emitting a first light, a first optical member having a first optical layer facing the supporting surface and reflecting the first light, a first wavelength conversion layer having a light incident surface and converting the first light into second light, a light emitting portion formed by at least the substrate and the first optical member, and a second optical member disposed at the light emitting portion and having a second optical layer which reflects the first light and transmits the second light. The first optical layer is inclined with respect to the light incident surface and reflects the second light. The first wavelength conversion layer is disposed on one of a surface of the first optical layer and the supporting surface. The light emitting portion emits the second light.Type: ApplicationFiled: March 24, 2023Publication date: September 28, 2023Inventor: Koichi AKIYAMA
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Publication number: 20230305373Abstract: A wavelength converter includes a substrate having a support surface, a first optical member including a first optical layer that transmits first light, a first wavelength conversion layer that is disposed at the support surface and converts the first light into second light, a second wavelength conversion layer that is disposed at a first wavelength conversion layer side with respect to the first optical layer and converts the first light into third light, a light emitting part that is formed by at least the substrate and the first optical member and emits light, and a second optical member that includes a second optical layer that reflects the first light and transmits the second and third lights and is disposed in the light emitting part. The first optical layer reflects the second and third lights. The second wavelength conversion layer converts part of the first light into the third light.Type: ApplicationFiled: March 24, 2023Publication date: September 28, 2023Inventor: Koichi AKIYAMA
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Publication number: 20230251417Abstract: A semiconductor optical integrated element according to the present disclosure includes:; a first optical amplifier which amplifies a signal beam inputted from a first end surface; a first passive optical waveguide which guides the amplified signal beam toward a direction different from a direction of the optical waveguide; an optical splitter which splits the guided signal beam into a plurality of signal beams; a phase modulator which is connected to the first passive optical waveguide and performs phase modulation on the plurality of signal beams; a second passive optical waveguide which guides each phase-modulated signal beam toward the direction of the optical waveguide; an optical multiplexer which multiplexes the plurality of phase-modulated signal beams into one signal beam; and a second optical amplifier which amplifies the signal beam guided by the second passive optical waveguide, and whose saturated beam output is smaller than that of the first optical amplifier.Type: ApplicationFiled: July 3, 2020Publication date: August 10, 2023Applicant: Mitsubishi Electric CorporationInventors: Yosuke SUZUKI, Koichi AKIYAMA
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Patent number: 11681210Abstract: An illuminator includes a light source that outputs first light having a first wavelength band, a wavelength converter that converts the first light into second light having a second wavelength band different from the first, a first optical element that reflects part of the first light to cause the reflected first light to be incident on the wavelength converter and transmits the other part of the first light and the second light, and a second optical element that reflects the other part of the first light having the first wavelength band and passing through the first optical element, the direction of the reflected light being the traveling direction of the second light having the second wavelength band and passing through the first optical element, and transmits the second light having the second wavelength band and emitted from the wavelength converter.Type: GrantFiled: August 26, 2021Date of Patent: June 20, 2023Assignee: SEIKO EPSON CORPORATIONInventors: Tomoko Akagawa, Koichi Akiyama, Katsuyuki Uehara
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Patent number: 11681211Abstract: A light source apparatus according to the present disclosure includes a first light source including a plurality of first light emitters arranged in a single row along a first direction, a second light source including a plurality of second light emitters arranged in a single row along a second direction, and a polarization combiner. The polarization combiner transmits the first luminous flux from the first light source and reflects the second luminous flux from the second light source. In an imaginary plane perpendicular to the center axis of the combined luminous flux, the direction in which the plurality of first beams are arranged in the single row and the direction in which the plurality of second beams are arranged in the single row intersect with each other, and the first luminous flux and the second luminous flux partially overlap with each other.Type: GrantFiled: March 10, 2022Date of Patent: June 20, 2023Assignee: SEIKO EPSON CORPORATIONInventor: Koichi Akiyama
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Publication number: 20230150210Abstract: The purpose of the present invention is to provide a fiber-reinforced resin material having minimal directionality of strength as well as excellent productivity, a method and device for manufacturing a fiber-reinforced resin material whereby a molded article is obtained, and a device for inspecting a fiber bundle group. A method for manufacturing a sheet-shaped fiber-reinforced resin material in which a paste (P1) is impregnated between cut fiber bundles (CF), the method for manufacturing a fiber-reinforced resin material including a coating step applying a coating of a paste (P1) on a first sheet (S11) conveyed in a predetermined direction, a cutting step for cutting a long fiber bundle (CF) using a cutter (113A), a scattering step for dispersing the cut fiber bundles (CF) and scattering the cut fiber bundles (CF) on the paste (P1), and an impregnation step for pressing a fiber bundle group (F1) and the paste (P1) on the first sheet (S11) and impregnating the paste (P1) between the fiber bundles (CF).Type: ApplicationFiled: January 18, 2023Publication date: May 18, 2023Applicant: Mitsubishi Chemical CorporationInventors: Hiroshi IWATA, Nobuyuki YAMAMOTO, Hajime OKUTSU, Ryuichi ISHIKAWA, Koichi AKIYAMA, Takayuki KOBAYASHI
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Patent number: 11652964Abstract: Four of laser light source sections each includes a semiconductor laser. Any two of the laser light source sections are disposed in an imaginary plane perpendicular to the center axis of a luminous flux and on a first imaginary line that intersects with the center axis so as to face each other with the center axis sandwiched between the two laser light source sections, and other two of the laser light source sections are disposed on a second imaginary line perpendicular to the first imaginary line so as to face each other with the center axis sandwiched between the two laser light source sections. The laser light source sections are at the same distance from the center axis. The first light, the second light, the third light, and the fourth light are each linearly polarized light and have the same polarization direction.Type: GrantFiled: February 14, 2022Date of Patent: May 16, 2023Assignee: SEIKO EPSON CORPORATIONInventor: Koichi Akiyama
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Patent number: 11630383Abstract: A light source apparatus according to an aspect of the present disclosure includes a first light source section, a second light source section, a first polarization separator, a second polarization separator that reflects part of second light and transmits the other part of the second light, a first phase retarder which is disposed between the first polarization separator and the second polarization separator and on which the part of the second light reflected off the second polarization separator is incident, a wavelength conversion layer that converts the first light and the part of the second light into third light having a second wavelength band and outputs the third light toward the first polarization separator, and a first light focusing optical system disposed between the wavelength conversion layer and the first polarization separator. The wavelength conversion layer has a first surface via which the third light exits and a second surface that intersects with the first surface.Type: GrantFiled: December 22, 2021Date of Patent: April 18, 2023Assignee: SEIKO EPSON CORPORATIONInventor: Koichi Akiyama
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Patent number: 11619872Abstract: A light source device according to the present disclosure includes a light source unit configured to emit a first light beam, a second light beam, and a third light beam, a first polarization split element configured to transmit the first light beam and the second light beam and reflect the third light beam, a second polarization split element configured to transmit the first light beam and reflect the second light beam, a first retardation element, a first diffusion element configured to diffuse the third light beam, a second diffusion element configured to diffuse the second light beam, and a third diffusion element configured to diffuse the first light beam. The first retardation element converts a polarization direction of the second light beam from the first polarization split element, and converts a polarization direction of the another part of the second light beam from the second polarization split element.Type: GrantFiled: February 25, 2022Date of Patent: April 4, 2023Assignee: SEIKO EPSON CORPORATIONInventor: Koichi Akiyama