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: 10416542Abstract: A light source device including a light emitting device that emits a first light and a second light; a first light separation element that separates the first light into a first light beam flux and a second light beam flux; a second light separation element that separates the second light into a third light beam flux and a fourth light beam flux; at least one fluorescent body layer that includes a first fluorescence emitting section on which the first light beam flux is incident and a second fluorescence emitting section on which the third light beam flux is incident; and at least one diffusion section that includes a first diffusion light emitting section on which the second light beam flux is incident and a second diffusion light emitting section on which the fourth light beam flux is incident.Type: GrantFiled: September 21, 2016Date of Patent: September 17, 2019Assignee: SEIKO EPSON CORPORATIONInventor: Koichi Akiyama
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Publication number: 20190271907Abstract: A wavelength conversion element includes a wavelength conversion layer that has a light incident surface on which excitation light is incident and converts the excitation light in terms of wavelength into fluorescence and a plurality of light transmissive members each having a curved surface and disposed in the light incident surface, and the curved surfaces reflect the excitation light but transmit the fluorescence.Type: ApplicationFiled: March 1, 2019Publication date: September 5, 2019Applicant: SEIKO EPSON CORPORATIONInventor: Koichi AKIYAMA
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Publication number: 20190258003Abstract: Two input waveguides are made of a semiconductor material. One output waveguide is made of a semiconductor material. A multi-mode-interference part is made of a semiconductor material. The multi-mode-interference part has an incoming end surface connected to the input waveguides, and an outgoing end surface opposite to the incoming end surface and connected to the output waveguide. The multi-mode-interference part has a waveguide width wider than the waveguide widths of the input waveguides and the waveguide width of the output waveguide. Two unwanted-light waveguides are made of a semiconductor material. The unwanted-light waveguides are connected to the outgoing end surface of the multi-mode-interference part so as to sandwich the output waveguide. The unwanted-light waveguides each satisfy a single-mode condition.Type: ApplicationFiled: August 1, 2017Publication date: August 22, 2019Applicant: Mitsubishi Electric CorporationInventors: Kosuke SHINOHARA, Koichi AKIYAMA
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Publication number: 20190243225Abstract: A light source apparatus includes a first laser light emitter that emits red light, a second laser light emitter that emits green light, a third laser light emitter that emits blue light, and a light combiner that the red light emitted from the first laser light emitter, the green light emitted from the second laser light emitter, and the blue light emitted from the third laser light emitter enter and that combines the incident red light, green light, and blue light with one another and outputs the combined light. The first laser light emitter includes L red light emitting devices. The second laser light emitter includes M green light emitting devices. The third laser light emitter includes N blue light emitting devices. L, M, and N are each an integer greater than or equal to one, and N is smaller than L and M.Type: ApplicationFiled: February 5, 2019Publication date: August 8, 2019Applicant: SEIKO EPSON CORPORATIONInventor: Koichi AKIYAMA
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Patent number: 10372027Abstract: An illuminator includes first and second light emitting devices that emit first and second light beams, respectively, first and second lens arrays, a light ray combining element that combines at least parts of the first and second light beams having passed through the first and second lens arrays with each other to produce a combined light ray flux, a light collection lens, and a diffused light producing element on which the combined light ray flux having passed through the light collection lens is incident.Type: GrantFiled: February 26, 2018Date of Patent: August 6, 2019Assignee: SEIKO EPSON CORPORATIONInventor: Koichi Akiyama
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Publication number: 20190229810Abstract: An optical modulation apparatus that can adjust modulation timing. A timing adjuster adjusts the modulation timing on the basis of an intensity detected by a light intensity detector, after a data generator respectively generates, as a first data signal and a second data signal, a first test data signal and a second test data signal each having a data string containing a test pattern in which a plurality of continuous marks and a plurality of continuous spaces are alternately repeated, and after a phase adjuster adjusts a phase difference to zero or ?.Type: ApplicationFiled: May 22, 2017Publication date: July 25, 2019Applicant: Mitsubishi Electric CorporationInventors: Shusaku HAYASHI, Kentaro ENOKI, Koichi AKIYAMA
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Publication number: 20190224926Abstract: 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: April 4, 2019Publication date: July 25, 2019Applicant: Mitsubishi Chemical CorporationInventors: Hiroshi Iwata, Nobuyuki Yamamoto, Hajime Okutsu, Ryuichi Ishikawa, Koichi Akiyama, Takayuki Kobayashi
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Publication number: 20190219912Abstract: An illuminator includes a light source apparatus that outputs, in a first direction, light containing first polarized light and second polarized light polarized in directions different from each other, a polarized light combiner that combines the first polarized light and the second polarized light and causes the combined light to exit in the first direction, and a rod integrator that the combined light having exited out of the polarized light combiner enters. The light source apparatus includes a first light emitter group having a configuration in which a plurality of semiconductor lasers including a first semiconductor laser that emits the first polarized light are arranged in a second direction and a second light emitter group having a configuration in which a plurality of semiconductor lasers including a second semiconductor laser that emits the second polarized light are arranged in the second direction.Type: ApplicationFiled: January 15, 2019Publication date: July 18, 2019Applicant: SEIKO EPSON CORPORATIONInventor: Koichi AKIYAMA
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Publication number: 20190219913Abstract: An illuminator according to an aspect of the invention includes a light source apparatus including a first light emitter that emits first light having a first color, a plurality of second light emitters that each emit second light having a second color, and a plurality of third light emitters that each emit third light having a third color, a rod integrator that combines the first light, the second light, and the third light with one another, a first lens that causes the first light, the second light, and the third light to be focused in the rod integrator, and a second lens that transmits only the first light out of the first light, the second light, and the third light. The plurality of second light emitters and the plurality of third light emitters are so disposed as to surround the first light emitter.Type: ApplicationFiled: January 16, 2019Publication date: July 18, 2019Applicant: SEIKO EPSON CORPORATIONInventor: Koichi AKIYAMA
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Patent number: 10343352Abstract: 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: June 24, 2016Date of Patent: July 9, 2019Assignee: Mitsubishi Chemical CorporationInventors: Hiroshi Iwata, Nobuyuki Yamamoto, Hajime Okutsu, Ryuichi Ishikawa, Koichi Akiyama, Takayuki Kobayashi
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Publication number: 20190196317Abstract: An illumination device includes a light source device, a first collimate optical system on which a light beam emitted from the light source device is made incident, a condensing optical system provided at a post-stage of the first collimate optical system, a rod provided at a post-stage of the condensing optical system, a second collimate optical system provided at a post-stage of the rod, a lens integrator provided at a post-stage of the second collimate optical system, and a superimposing lens provided at a post-stage of the lens integrator. The lens integrator includes a first lens array and a second lens array provided at a post-stage of the first lens array. A light-emitting end face of the rod and a lens surface of the second lens array are substantially conjugate with each other.Type: ApplicationFiled: August 23, 2017Publication date: June 27, 2019Applicant: SEIKO EPSON CORPORATIONInventor: Koichi AKIYAMA
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Patent number: 10323133Abstract: The present invention relates to a molding material, having: (A): a fiber substrate made of carbon fibers 5 mm or longer; (B): at least either an epoxy (meth)acrylate resin or an unsaturated polyester resin; (C): (C-1) inorganic fibrous filler with a cross-sectional area of at least 0.8 ?m2, or (C-2) inorganic flaky filler with a cross-sectional area of at least 0.05 ?m2, both of which have an aspect ratio of 2.0 or higher and a length of less than 3 mm; and (D): a polyisocyanate compound.Type: GrantFiled: September 8, 2015Date of Patent: June 18, 2019Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Koichi Akiyama, Yuji Kazehaya, Mitsushi Nishimura, Shinichiro Furuya
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Publication number: 20190165862Abstract: A timing adjuster shifts a timing between a first data-stream group and a second data-stream group in accordance with a timing setting. A data generator in first test mode generates a first test-data stream repeating 2N-bit marks and 2N-bit spaces as each of a first data stream and a third data stream, and generates a second test-data stream that is N-bit shifted from the first test-data stream, where N denotes a natural number. A first phase-difference setting and a second phase-difference setting are rendered zero. The timing adjuster adjusts the timing setting so as to maximize a detected value from a peak detection circuit.Type: ApplicationFiled: May 18, 2017Publication date: May 30, 2019Applicant: Mitsubishi Electric CorporationInventors: Shusaku HAYASHI, Kentaro ENOKI, Koichi AKIYAMA
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Patent number: 10300666Abstract: 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: June 24, 2016Date of Patent: May 28, 2019Assignee: Mitsubishi Chemical CorporationInventors: Hiroshi Iwata, Nobuyuki Yamamoto, Hajime Okutsu, Ryuichi Ishikawa, Koichi Akiyama, Takayuki Kobayashi
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Publication number: 20190129289Abstract: A light source apparatus includes a plurality of semiconductor lasers arranged on a substrate along a first direction, a rod integrator on which the plurality of light beams from the plurality of semiconductor lasers are incident, and a cylindrical lens so provided between the plurality of semiconductor lasers and the light incident end surface of the rod integrator as to cover the optical paths of the plurality of light beams. The plurality of semiconductor lasers include a first, second and third semiconductor laser. The center axis of each of the plurality of light beams intersects the first direction. A light emitting region of each of the semiconductor lasers has a lengthwise direction. The generatrix of the cylindrical lens is parallel to the lengthwise direction. First to third color light beams are combined with one another by the rod integrator, and the combined light exits out of the rod integrator.Type: ApplicationFiled: October 25, 2018Publication date: May 2, 2019Applicant: SEIKO EPSON CORPORATIONInventor: Koichi AKIYAMA
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Publication number: 20190129273Abstract: The present invention has an object to provide an optical modulator having a small-sized circuit configuration and a smaller voltage drop amount in a terminating resistor. An optical modulator includes first and second optical waveguides, a first signal electrode that inputs a first high frequency signal into the first optical waveguide, a second signal electrode that inputs a second high frequency signal having a reverse phase with respect to a phase of the first high frequency signal into the second optical waveguide, a first terminating resistor connected to the first signal electrode at a terminating part side, a second terminating resistor connected to the second signal electrode at a terminating part side, a connection point that connects the first and second signal electrodes via the first and second terminating resistors, and a direct current voltage supply connected to the connection point.Type: ApplicationFiled: February 23, 2017Publication date: May 2, 2019Applicant: Mitsubishi Electric CorporationInventors: Toshiyuki TANAKA, Koichi AKIYAMA, Eiji YAGYU, Kiyotomo HASEGAWA
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Publication number: 20190124305Abstract: An illuminator includes a light source apparatus including a red solid-state light source unit that emits red light, a green solid-state light source unit that emits green light, and a blue solid-state light source unit that emits blue light, a light combining system that combines the red light, the green light, and the blue light to generate illumination light and emits the illumination light in a first direction, a focusing lens on which the illumination light emitted from the light combining system is incident, a diffuser disposed on the light exiting side of the focusing lens, and an adjustment lens that is located between the green solid-state light source unit and the light combining system and adjusts the position where the green light is focused.Type: ApplicationFiled: October 24, 2018Publication date: April 25, 2019Applicant: SEIKO EPSON CORPORATIONInventor: Koichi AKIYAMA
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Publication number: 20190121275Abstract: A paper feeding device includes a paper roll holder, a first roller that is rotated to convey paper drawn out from the paper roll, a bending portion having a curved inner guide and a curved outer guide between which the paper conveyed by the first roller is conveyed, a second roller that is disposed downstream of the bending portion in a conveying direction of the paper, and configured to be rotated to convey the paper conveyed from the bending portion and to idle when the paper conveyed from the bending portion applies a rotation force thereto, and a control unit configured to control rotation of the first roller so that the first roller conveys the paper at a target conveying speed.Type: ApplicationFiled: July 11, 2018Publication date: April 25, 2019Inventor: Koichi AKIYAMA
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Patent number: 10268113Abstract: An illumination device is provided with a light source device including a first light-emitting element that emits a first pencil of rays, and a light shaping optical system including a first lens surface on which the first pencil of rays is incident. The first lens surface has a first free-form surface represented by Expression (1) in which x and y are used as variables. In Expression (1), in a case where h is set to a positive integer, the coefficient Cj of the x2h term is different from the coefficient Cj of the y2h term.Type: GrantFiled: January 16, 2018Date of Patent: April 23, 2019Assignee: SEIKO EPSON CORPORATIONInventors: Katsuyuki Uehara, Koichi Akiyama
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Publication number: 20190094672Abstract: An illumination device according to the invention includes a light source section including a plurality of light emitting devices adapted to emit light, and a holding member adapted to hold the plurality of light emitting devices, a polarization separation element adapted to separate the light emitted from the light source section into a first light beam and a second light beam, a wavelength conversion device adapted to convert the first light beam into a third light beam, a conversion optical system adapted to convert the second light beam into a fourth light beam, a color combining element, a detection device adapted to detect an intensity of the third light beam and an intensity of the fourth light beam, and a control device adapted to change a polarization state of the light emitted from the light source section in accordance with a detection result by the detection device.Type: ApplicationFiled: September 26, 2018Publication date: March 28, 2019Applicant: SEIKO EPSON CORPORATIONInventor: Koichi AKIYAMA