Patents by Inventor Tatsuya Nakazawa
Tatsuya Nakazawa 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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Publication number: 20240313137Abstract: A photoelectric conversion element including a thin film composed of a transition metal dichalcogenide and formed on a base material. In the present invention, a surface of the thin film composed of the transition metal dichalcogenide is modified with at least any nanorod particles of Au nanorod particles composed of Au and Ag nanorod particles composed of Ag. An average aspect ratio of the Au nanorod particles is 3.0 or more and 12.0 or less, and an average aspect ratio of the Ag nanorod particles is 3.0 or more and 13.0 or less. In the invention, the sensitivity to light having wavelengths in the near-infrared region improves by a sensitizing action attributed to localized surface plasmon resonance that is developed by the Au and Ag nanorod particles. The photoelectric conversion element exhibits sensitivity even to light having wavelengths in the near-infrared region near a wavelength range of 1600 nm.Type: ApplicationFiled: October 4, 2021Publication date: September 19, 2024Applicants: TANAKA KIKINZOKU KOGYO K.K., University Industry Foundation, Yonsei UniversityInventors: Tatsuya NAKAZAWA, Shinichi KATO, Hyung Jun KIM, Dong Hyun KIM
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Publication number: 20240258446Abstract: The present invention relates to a thin film containing a chalcogenide of Ir or Ru of a platinum group metal. This thin film is formed on a prescribed substrate, contains a platinum group metal chalcogenide, and the platinum group metal chalcogenide contains any one of Ir2S3, IrS2, RuS2, and RuSe2. A thickness of the thin film is 0.5 nm or more and 500 nm or less. The present invention has revealed, through an experimental method and simulation using first-principles calculation based on density functional theory (DFT), that a thin film containing Ir2S3, IrS2, RuS2 or RuSe2 can exhibit a photoelectric effect by near infrared light irradiation. The present invention is drawn to a thin film that is characterized by sensitivity to light with a wavelength in a near infrared region in particular, and contains a platinum group metal chalcogenide having a constitution previously unknown.Type: ApplicationFiled: March 10, 2022Publication date: August 1, 2024Applicants: TANAKA KIKINZOKU KOGYO K.K., UNIVERSITY INDUSTRY FOUNDATION, YONSEI UNIVERSITYInventors: Tatsuya NAKAZAWA, Hyung Jun KIM, Dong Hyun KIM
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Publication number: 20240085733Abstract: A display device includes a backlight, a display element, a plate for holding at least a portion of an emission surface, from which an image light is emitted, provided on the display element, and a heat dissipation portion that dissipates heat generated from the display element. The display element is connected to the heat dissipation portion via the plate.Type: ApplicationFiled: November 17, 2023Publication date: March 14, 2024Applicant: Maxell, Ltd.Inventors: Eiji KAWAWA, Toshinori SUGIYAMA, Tomoki YAMAMOTO, Tatsuya NAKAZAWA, Keisuke SAWADA, Akio MISAWA, Nozomu SHIMODA
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Publication number: 20240014335Abstract: The present invention relates to a photoelectric conversion element material provided with a base material and a light-receiving layer including a semiconductor film formed on the base material. The semiconductor film that forms this light-receiving layer includes Ag2?xBixSx+1 (x is an integer of 0 or 1) and has a crystallite diameter of 10 nm or more and 40 nm or less. The light-receiving layer can be produced by applying an ink containing the semiconductor nanoparticles dispersed in a dispersion medium to a base material and then firing the ink at 200° C. or higher and 350° C. or lower. The photoelectric conversion element material of the present invention has an absorption property with respect to light with wavelengths in the near infrared region and excellent photoresponsivity.Type: ApplicationFiled: December 27, 2021Publication date: January 11, 2024Applicants: TANAKA KIKINZOKU KOGYO K.K., UNIVERSITY INDUSTRY FOUNDATION, YONSEI UNIVERSITYInventors: Hiroki SATO, Yuusuke OHSHIMA, Tatsuya NAKAZAWA, Hyung Jun KIM, Dong Hyun KIM
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Patent number: 11860463Abstract: A HUD includes a plate that connects an emission-surface of the LCD and a heat sink, is formed of a material having a higher thermal conductivity than air, and is provided with an emission-surface exhaust heat path that is formed to: include a holding region fixed to a periphery of the emission-surface directly or via a material having a higher thermal conductivity than air, and an intermediate region connecting the holding region and the heat sink; connect an end portion, which is opposite to the holding region, of the intermediate region with the heat sink directly or via a material having a higher thermal conductivity than air; extend from the emission-surface to the heat sink via the plate; and have a thermal gradient greater than that of a heat transfer path for transferring heat from the emission-surface to the heat sink by using air as a medium.Type: GrantFiled: October 28, 2019Date of Patent: January 2, 2024Assignee: MAXELL, LTD.Inventors: Eiji Kawawa, Toshinori Sugiyama, Tomoki Yamamoto, Tatsuya Nakazawa, Keisuke Sawada, Akio Misawa, Nozomu Shimoda
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Publication number: 20220179259Abstract: A HUD includes a plate that connects an emission-surface of the LCD and a heat sink, is formed of a material having a higher thermal conductivity than air, and is provided with an emission-surface exhaust heat path that is formed to: include a holding region fixed to a periphery of the emission-surface directly or via a material having a higher thermal conductivity than air, and an intermediate region connecting the holding region and the heat sink; connect an end portion, which is opposite to the holding region, of the intermediate region with the heat sink directly or via a material having a higher thermal conductivity than air; extend from the emission-surface to the heat sink via the plate; and have a thermal gradient greater than that of a heat transfer path for transferring heat from the emission-surface to the heat sink by using air as a medium.Type: ApplicationFiled: October 28, 2019Publication date: June 9, 2022Applicant: Maxell, Ltd.Inventors: Eiji KAWAWA, Toshinori SUGIYAMA, Tomoki YAMAMOTO, Tatsuya NAKAZAWA, Keisuke SAWADA, Akio MISAWA, Nozomu SHIMODA
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Patent number: 11066728Abstract: The present invention relates to a Ni-based heat-resistant alloy including Ir: 5.0 mass % or more and 50.0 mass % or less, Al: 1.0 mass % or more and 8.0 mass % or less, W: 5.0 mass % or more and 25.0 mass % or less, and balance Ni, having an L12-structured ?? phase present in the matrix, and including at least one of Zr: 0.01 mass % or more and 3.0 mass % or less and Hf: 0.01 mass % or more and 3.0 mass % or less. This Ni-based heat-resistant alloy has improved toughness over a conventional Ni-based heat-resistant alloy based on a Ni—Ir—Al—W-based alloy, and is also excellent in ambient-temperature strength.Type: GrantFiled: December 5, 2017Date of Patent: July 20, 2021Assignees: TOHOKU TECHNO ARCH CO., LTD., TANAKA KIKINZOKU KOGYO K.K.Inventors: Kiyohito Ishida, Toshihiro Omori, Yutaka Sato, Koichi Sakairi, Kunihiro Tanaka, Tatsuya Nakazawa
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Patent number: 11053570Abstract: The present invention relates to a Ni-based heat-resistant alloy including Ir: 5.0 mass % or more and 50.0 mass % or less, Al: 1.0 mass % or more and 8.0 mass % or less, W: 5.0 mass % or more and 25.0 mass % or less, and balance Ni, having an L12-structured ?? phase present in the matrix, and including at least one of Ru: 0.8 mass % or more and 5.0 mass % or less and Re: 0.8 mass % or more and 5.0 mass % or less. This Ni-based heat-resistant alloy has improved toughness over a conventional Ni-based heat-resistant alloy based on a Ni—Ir—Al—W-based alloy, and is also excellent in ambient-temperature strength.Type: GrantFiled: December 4, 2017Date of Patent: July 6, 2021Assignees: TOHOKU TECHNO ARCH CO., LTD., TANAKA KIKINZOKU KOGYO K.K.Inventors: Kiyohito Ishida, Toshihiro Omori, Yutaka Sato, Koichi Sakairi, Kunihiro Tanaka, Tatsuya Nakazawa
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Patent number: 10890763Abstract: Provided is an information display apparatus that significantly improves light resistance with respect to sunlight. The information display apparatus, which displays video-image information on a projection surface by a virtual image, includes in a housing partly having an opening: a video-image-light generator that generates video-image light for displaying the video-image information; a video-image-light processor that performs a predetermined optical processing to a video image generated by the video-image-light generator; and a projector that projects, onto the projection surface through the opening of the housing, the video-image light optically processed by the video-image-light processor so that a viewer is capable of virtually recognizing the video-image information as a virtual image in front of the projection surface, wherein a light path in the housing is provided with a suppressor selectively suppressing a P-polarizing component of light in a visible light region.Type: GrantFiled: November 13, 2017Date of Patent: January 12, 2021Assignee: MAXELL, LTD.Inventors: Koji Hirata, Masahiko Yatsu, Toshinori Sugiyama, Akio Misawa, Shigeki Hoshino, Kazuomi Kaneko, Tatsuya Nakazawa, Takumi Nakada, Yuki Nagano, Tomoki Yamamoto
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Patent number: 10620757Abstract: An input device includes a casing having a recess in its inner surface, and a pressure-sensitive sensor disposed in the recess. The pressure-sensitive sensor is fixed in the recess so that a sensing surface of the pressure-sensitive sensor and a bottom surface of the recess are in contact with each other.Type: GrantFiled: January 26, 2016Date of Patent: April 14, 2020Assignee: Sony CorporationInventors: Yoshiteru Taka, Takeshi Koizumi, Tomoki Kawabata, Munetake Ebihara, Tatsuya Nakazawa, Machiko Endo, Takuya Goto, Keiichi Nakamura, Yukio Sakakibara
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Publication number: 20190346676Abstract: Provided is an information display apparatus that significantly improves light resistance with respect to sunlight. The information display apparatus, which displays video-image information on a projection surface by a virtual image, includes in a housing partly having an opening: a video-image-light generator that generates video-image light for displaying the video-image information; a video-image-light processor that performs a predetermined optical processing to a video image generated by the video-image-light generator; and a projector that projects, onto the projection surface through the opening of the housing, the video-image light optically processed by the video-image-light processor so that a viewer is capable of virtually recognizing the video-image information as a virtual image in front of the projection surface, wherein a light path in the housing is provided with a suppressor selectively suppressing a P-polarizing component of light in a visible light region.Type: ApplicationFiled: November 13, 2017Publication date: November 14, 2019Inventors: Koji HIRATA, Masahiko YATSU, Toshinori SUGIYAMA, Akio MISAWA, Shigeki HOSHINO, Kazuomi KANEKO, Tatsuya NAKAZAWA, Takumi NAKADA, Yuki NAGANO, Tomoki YAMAMOTO
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Publication number: 20190338398Abstract: The present invention relates to a Ni-based heat-resistant alloy including Ir: 5.0 mass % or more and 50.0 mass % or less, Al: 1.0 mass % or more and 8.0 mass % or less, W: 5.0 mass % or more and 25.0 mass % or less, and balance Ni, having an L12-structured ?? phase present in the matrix, and including at least one of Ru: 0.8 mass % or more and 5.0 mass % or less and Re: 0.8 mass % or more and 5.0 mass % or less. This Ni-based heat-resistant alloy has improved toughness over a conventional Ni-based heat-resistant alloy based on a Ni—Ir—Al—W-based alloy, and is also excellent in ambient-temperature strength.Type: ApplicationFiled: December 4, 2017Publication date: November 7, 2019Applicants: TOHOKU TECHNO ARCH CO., LTD., TANAKA KIKINZOKU KOGYO K.K.Inventors: Kiyohito ISHIDA, Toshihiro OMORI, Yutaka SATO, Koichi SAKAIRI, Kunihiro TANAKA, Tatsuya NAKAZAWA
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Publication number: 20190316229Abstract: The present invention relates to a Ni-based heat-resistant alloy including Ir: 5.0 mass % or more and 50.0 mass % or less, Al: 1.0 mass % or more and 8.0 mass % or less, W: 5.0 mass % or more and 25.0 mass % or less, and balance Ni, having an L12-structured ?? phase present in the matrix, and including at least one of Zr: 0.01 mass % or more and 3.0 mase/0 or less and Hf: 0.01 mass % or more and 3.0 mass % or less. This Ni-based heat-resistant alloy has improved toughness over a conventional Ni-based heat-resistant alloy based on a Ni—Ir—Al—W-based alloy, and is also excellent in ambient-temperature strength.Type: ApplicationFiled: December 5, 2017Publication date: October 17, 2019Applicants: TOHOKU TECHNO ARCH CO., LTD., TANAKA KIKINZOKU KOGYO K.K.Inventors: Kiyohito ISHIDA, Toshihiro OMORI, Yutaka SATO, Koichi SAKAIRI, Kunihiro TANAKA, Tatsuya NAKAZAWA
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Patent number: 10137496Abstract: The present invention provides a metal wire rod composed of iridium or an iridium alloy, wherein the number of crystal grains on any cross-section in a longitudinal direction is 2 to 20 per 0.25 mm2, and the Vickers hardness at any part is 200 Hv or more and less than 400 Hv. The iridium wire rod is a material which is produced by a ?-PD method, and has low residual stress and which has a small change in the number of crystal grains and hardness even when heated to a temperature equal to or higher than a recrystallization temperature (1200° C. to 1500° C.). The metal wire rod of the present invention is excellent in oxidative consumption resistance under a high-temperature atmosphere, and mechanical properties.Type: GrantFiled: March 23, 2015Date of Patent: November 27, 2018Assignee: TANAKA KIKINZOKU KOGYO K.K.Inventors: Akira Yoshikawa, Yuui Yokota, Muneki Nakamura, Kunihiro Tanaka, Tatsuya Nakazawa, Koichi Sakairi
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Patent number: 10094012Abstract: The present invention relates to a NiIr-base heat-resistant alloy which includes a Ni—Ir—Al—W-base alloy which contains Ir: 5.0 to 50.0 mass %, Al: 1.0 to 8.0 mass %, W: 5.0 to 20.0 mass %, and the balance is Ni, and a ?? phase having an L12 structure precipitating and dispersing in a matrix as an essential strengthening phase, and a ratio (Y/X) of a peak intensity (Y) of (201) plane of the Ir3W phase observed in the range of 2?=48° to 50° to a peak intensity (X) of (111) plane of the ?? phase observed in the range of 2?=43° to 45° in X-ray diffraction analysis is 0.5 or less. The alloy exhibits good high-temperature property stably.Type: GrantFiled: March 23, 2015Date of Patent: October 9, 2018Assignee: TANAKA KIKINZOKU KOGYO K.K.Inventors: Kiyohito Ishida, Toshihiro Omori, Yutaka Sato, Kunihiro Tanaka, Muneki Nakamura, Koichi Sakairi, Tatsuya Nakazawa
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Patent number: 9935558Abstract: To achieve reduction in size and reduction in cost of a DC-DC converter apparatus. Rectifier elements and are installed onto a metal base, and a drive circuit board is installed to an upper part of the rectifier element. Each terminal of the rectifier elements and is soldered to the drive circuit board. Three terminals of the rectifier elements are soldered, respectively, to a drive signal wiring pattern, a high-potential-side main current wiring pattern, and a low-potential-side main current wiring pattern of the board. A pair of output terminals of a transformer is connected to at least the pair of high-potential-side main current wiring patterns using high-potential-side metal conductors.Type: GrantFiled: October 1, 2014Date of Patent: April 3, 2018Assignee: Hitachi Automotive Systems, Ltd.Inventors: Tatsuya Nakazawa, Yuji Sobu, Hidenori Shinohara, Yoshiharu Yamashita
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Publication number: 20180039353Abstract: An input device includes a casing having a recess in its inner surface, and a pressure-sensitive sensor disposed in the recess. The pressure-sensitive sensor is fixed in the recess so that a sensing surface of the pressure-sensitive sensor and a bottom surface of the recess are in contact with each other.Type: ApplicationFiled: January 26, 2016Publication date: February 8, 2018Applicant: Sony CorporationInventors: Yoshiteru Taka, Takeshi Koizumi, Tomoki Kawabata, Munetake Ebihara, Tatsuya Nakazawa, Machiko Endo, Takuya Goto, Keiichi Nakamura, Yukio Sakakibara
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Patent number: 9814154Abstract: Provided is a power converter without a crack in a board or peeling-off of a pattern at the time of being grounded to a metal base. A GND protruding terminal is molded in a metal base in an integrated manner. A drive circuit board is provided with rectifier elements, first to third wiring patterns, and a ground pattern. A ground metal conductor, which connects the ground pattern and the metal base, is placed on a top surface of the GND protruding terminal, and is screwed to a female screw portion of the GND protruding terminal.Type: GrantFiled: October 1, 2014Date of Patent: November 7, 2017Assignee: Hitachi Automotive Systems, Ltd.Inventors: Tatsuya Nakazawa, Hidenori Shinohara, Yoshiharu Yamashita
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Patent number: 9776514Abstract: As an object of reducing a noise resulted from the mutual influences between circuit-configuring components, a DC-DC converter includes a high voltage circuit section that is electrically connected to a transformer, a low voltage circuit section that is electrically connected to the transformer, a housing in which the high voltage circuit section and the low voltage circuit section are accommodated, a control circuit board that controls the driving of the low voltage circuit section, and a frame that supports the control circuit board. The frame is arranged on a position facing a bottom surface of the housing while crossing the low voltage circuit section. The housing includes a first wall that separates a first space in which the high voltage circuit section is accommodated and a second space in which circuit components configuring the low voltage circuit section are accommodated. The frame forms a second wall that protrudes toward a direction approaching a leading end of the first wall.Type: GrantFiled: November 6, 2013Date of Patent: October 3, 2017Assignee: Hitachi Automotive Systems, Ltd.Inventors: Yuuji Sobu, Mikito Komatsu, Keisuke Fukumasu, Tatsuya Nakazawa
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Publication number: 20170130310Abstract: The present invention relates to a NiIr-base heat-resistant alloy which includes a Ni—Ir—Al—W-base alloy which contains Ir: 5.0 to 50.0 mass %, Al: 1.0 to 8.0 mass %, W: 5.0 to 20.0 mass %, and the balance is Ni, and a ?? phase having an L12 structure precipitating and dispersing in a matrix as an essential strengthening phase, and a ratio (Y/X) of a peak intensity (Y) of (201) plane of the Ir3W phase observed in the range of 2?=48° to 50° to a peak intensity (X) of (111) plane of the ?? phase observed in the range of 2?=43° to 45° in X-ray diffraction analysis is 0.5 or less. The alloy exhibits good high-temperature property stably.Type: ApplicationFiled: March 23, 2015Publication date: May 11, 2017Applicant: Tanaka Kikinzoku Kogyo K.K.Inventors: Kiyohito ISHIDA, Toshihiro OMORI, Yutaka SATO, Kunihiro TANAKA, Muneki NAKAMURA, Koichi SAKAIRI, Tatsuya NAKAZAWA