Patents by Inventor Tatsuya Kameyama
Tatsuya Kameyama 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: 20190153310Abstract: A method of producing semiconductor nanoparticles is provided. The method includes heating primary semiconductor nanoparticles and a salt of an element M1 in a solvent at a temperature set in a range of 100° C. to 300° C. The primary semiconductor nanoparticles contain the element M1, an element M2, optionally an element M3, and an element Z, and have an average particle size of 50 nm or less. The element M1 is at least one element selected from the group consisting of Ag, Cu, and Au. The element M2 is at least one element selected from the group consisting of Al, Ga, In, and Tl. The element M3 is at least one element selected from the group consisting of Zn and Cd. The element Z is at least one element selected from the group consisting of S, Se, and Te.Type: ApplicationFiled: January 29, 2019Publication date: May 23, 2019Applicants: NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY, NICHIA CORPORATIONInventors: Tsukasa TORIMOTO, Tatsuya KAMEYAMA, Akihiro FUKATSU, Daisuke OYAMATSU
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Patent number: 10233389Abstract: A method of producing semiconductor nanoparticles is provided. The method includes heating primary semiconductor nanoparticles and a salt of an element M1 in a solvent at a temperature set in a range of 100° C. to 300° C. The primary semiconductor nanoparticles contain the element M1, an element M2, optionally an element M3, and an element Z, and have an average particle size of 50 nm or less. The element M1 is at least one element selected from the group consisting of Ag, Cu, and Au. The element M2 is at least one element selected from the group consisting of Al, Ga, In, and Tl. The element M3 is at least one element selected from the group consisting of Zn and Cd. The element Z is at least one element selected from the group consisting of S, Se, and Te.Type: GrantFiled: July 21, 2016Date of Patent: March 19, 2019Assignees: NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY, NICHIA CORPORATIONInventors: Tsukasa Torimoto, Tatsuya Kameyama, Akihiro Fukatsu, Daisuke Oyamatsu
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Publication number: 20190031430Abstract: Provided is a pressurizing system which includes: a pressurizing nozzle configured to supply a pressurizing gas into a hopper (3) where pulverized coal is accumulated; a filter configured to face a space in the hopper (3) where the pulverized coal is accumulated, and to allow the pressurizing gas to pass through the filter, the filter being provided at an end of the pressurizing nozzle; buffer tanks (5a), (5b) in which a pressurizing gas to be supplied to the hopper (3) is collected at a first predetermined pressure; and a pressure control means configured to start, at a time of starting pressurization of the hopper (3), supply of a pressurizing gas at a second predetermined pressure which is lower than the first predetermined pressure of the pressurizing gas collected in the buffer tanks (5a), (5b).Type: ApplicationFiled: February 6, 2017Publication date: January 31, 2019Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Yuichiro Urakata, Koji Nishimura, Naoto Nakayama, Yoshinori Koyama, Tatsuya Kameyama
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Patent number: 10081764Abstract: Tellurium compound nanoparticles, including: an element M1 where M1 is at least one element selected from Cu, Ag, and Au; an element M2 where M2 is at least one element selected from B, Al, Ga, and In; Te; and optionally an element M3 where M3 is at least one element selected from Zn, Cd, and Hg; wherein a crystal structure of the tellurium compound nanoparticles is a hexagonal system, the tellurium compound nanoparticles are of a rod shape and have an average short-axis length of 5.5 nm or less, and when irradiated with light at a wavelength in a range of 350 nm to 1,000 nm, the tellurium compound nanoparticles emit photoluminescence having a wavelength longer than the wavelength of the irradiation light.Type: GrantFiled: July 1, 2016Date of Patent: September 25, 2018Assignees: NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY, NICHIA CORPORATIONInventors: Tsukasa Torimoto, Tatsuya Kameyama, Yujiro Ishigami, Kouta Sugiura, Daisuke Oyamatsu
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Publication number: 20180066183Abstract: Provided is a ternary or quaternary semiconductor nanoparticle that enables the band-edge emission and a less toxic composition. A semiconductor nanoparticle is provided that contains Ag, In, and S and has an average particle size of 50 nm or less, wherein the ratio of the number of atoms of Ag to the total number of atoms of Ag and In is 0.320 or more and 0.385 or less, the ratio of the number of atoms of S to the total number of atoms of Ag and In is 1.20 or more and 1.45 or less. The semiconductor nanoparticle is adapted to emit photoluminescence having a photoluminescence lifetime of 200 ns or less upon being irradiated with light having a wavelength in a range of 350 nm to 500 nm.Type: ApplicationFiled: September 5, 2017Publication date: March 8, 2018Applicants: NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY, OSAKA UNIVERSITY, NICHIA CORPORATIONInventors: Tsukasa TORIMOTO, Tatsuya KAMEYAMA, Marino KISHI, Susumu KUWABATA, Taro UEMATSU, Daisuke OYAMATSU
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Patent number: 9911518Abstract: A cathode active material for lithium-ion battery is provided, which provides good battery characteristics such as cycle characteristics. The cathode active material for lithium-ion battery is expressed by the composition formula: LixNi1-yMyO?, wherein M is one or more selected from Ti, Cr, Mn, Fe, Co, Cu, Al, Sn, Mg and Zr; 0.9?x?1.2; 0<y?0.5; and 2.0???2.2, wherein the crystallite size obtained by analyzing the XRD pattern is 870 ? or more and the unit lattice volume is 101.70 ?3 or less.Type: GrantFiled: September 30, 2013Date of Patent: March 6, 2018Assignee: JX Nippon Mining & Metals CorporationInventors: Tatsuya Kameyama, Tomoya Tamura
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Publication number: 20170267924Abstract: A semiconductor nanoparticle includes a core and a shell covering a surface of the core. The shell has a larger bandgap energy than the core and is in heterojunction with the core. The semiconductor nanoparticle emits light when irradiated with light. The core is made of a semiconductor that contains M1, M2, and Z. M1 is at least one element selected from the group consisting of Ag, Cu, and Au. M2 is at least one element selected from the group consisting of Al, Ga, In and Tl. Z is at least one element selected from the group consisting of S, Se, and Te. The shell is made of a semiconductor that consists essentially of a Group 13 element and a Group 16 element.Type: ApplicationFiled: March 15, 2017Publication date: September 21, 2017Applicants: OSAKA UNIVERSITY, NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY, NICHIA CORPORATIONInventors: Susumu KUWABATA, Taro UEMATSU, Kazutaka WAJIMA, Tsukasa TORIMOTO, Tatsuya KAMEYAMA, Daisuke OYAMATSU, Kenta NIKI
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Publication number: 20170022413Abstract: A method of producing semiconductor nanoparticles is provided. The method includes heating primary semiconductor nanoparticles and a salt of an element M1 in a solvent at a temperature set in a range of 100° C. to 300° C. The primary semiconductor nanoparticles contain the element M1, an element M2, optionally an element M3, and an element Z, and have an average particle size of 50 nm or less. The element M1 is at least one element selected from the group consisting of Ag, Cu, and Au. The element M2 is at least one element selected from the group consisting of Al, Ga, In, and Tl. The element M3 is at least one element selected from the group consisting of Zn and Cd. The element Z is at least one element selected from the group consisting of S, Se, and Te.Type: ApplicationFiled: July 21, 2016Publication date: January 26, 2017Applicants: NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY, NICHIA CORPORATIONInventors: Tsukasa TORIMOTO, Tatsuya KAMEYAMA, Akihiro FUKATSU, Daisuke OYAMATSU
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Publication number: 20170002265Abstract: Tellurium compound nanoparticles, including: an element M1 where M1 is at least one element selected from Cu, Ag, and Au; an element M2 where M2 is at least one element selected from B, Al, Ga, and In; Te; and optionally an element M3 where M3 is at least one element selected from Zn, Cd, and Hg; wherein a crystal structure of the tellurium compound nanoparticles is a hexagonal system, the tellurium compound nanoparticles are of a rod shape and have an average short-axis length of 5.5 nm or less, and when irradiated with light at a wavelength in a range of 350 nm to 1,000 nm, the tellurium compound nanoparticles emit photoluminescence having a wavelength longer than the wavelength of the irradiation light.Type: ApplicationFiled: July 1, 2016Publication date: January 5, 2017Applicants: NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY, NICHIA CORPORATIONInventors: Tsukasa TORIMOTO, Tatsuya KAMEYAMA, Yujiro ISHIGAMI, Kouta SUGIURA, Daisuke OYAMATSU
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Publication number: 20150188134Abstract: A cathode active material for lithium-ion battery is provided, which provides good battery characteristics such as cycle characteristics. The cathode active material for lithium-ion battery is expressed by the composition formula: LixNi1-yMyO?, wherein M is one or more selected from Ti, Cr, Mn, Fe, Co, Cu, Al, Sn, Mg and Zr; 0.9?x?1.2; 0<y?0.5; and 2.0???2.2, wherein the crystallite size obtained by analyzing the XRD pattern is 870 ? or more and the unit lattice volume is 101.70 ?3 or less.Type: ApplicationFiled: September 30, 2013Publication date: July 2, 2015Applicant: JX Nippon Mining & Metals CorporationInventors: Tatsuya Kameyama, Tomoya Tamura
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Patent number: 9028723Abstract: Copper(II) acetate, zinc(II) acetate, and tin(IV) acetate are weighed so that the total amount of metal ions is 2.0×10?4 mol and the molar ratio of ions is Cu:Zn:Sn=2:1:1, and 2.0 cm3 of oleylamine is added to prepare a mixed solution. Apart from this, 1.0 cm3 of oleylamine is added to 2.0×10?4 mol of sulfur powder to prepare a mixed solution. These mixed solutions are separately heated at 60° C. and mixed at room temperature. The pressure in a test tube is reduced, followed by nitrogen filling. The test tube is heated at 240° C. for 30 minutes and then allowed to stand until room temperature. The resultant product is separated into a supernatant and precipitates by centrifugal separation. The separated supernatant is filtered, methanol is added to produce precipitates. The precipitates are dissolved by adding chloroform to prepare a semiconductor nanoparticle solution.Type: GrantFiled: February 25, 2010Date of Patent: May 12, 2015Assignees: National University Corporation Nagoya University, Osaka University, Tokyo University of Science Educational Foundation Administrative OrganizationInventors: Tsukasa Torimoto, Ken-ichi Okazaki, Tatsuya Kameyama, Takaaki Osaki, Susumu Kuwabata, Akihiko Kudo
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Patent number: 8266450Abstract: It is possible to achieve the protection of software with reduced overhead. For example, a memory for storing an encrypted code prepared in advance and a decryptor module for decrypting the code are provided. The decryptor module includes, for example, a three-stage pipeline and a selector for selecting one output from the outputs of each stage of the pipeline. When a branch instruction is issued and subsequent inputs of the pipeline are in the order of CD?1, CD?2, . . . , the decryptor module outputs a first decrypted code by performing a one-stage pipeline process to CD?1. Next, the decryptor module outputs a second decrypted code by performing a two-stage pipeline process to CD?2, and the decryptor module outputs a third decrypted code by performing a three-stage pipeline process to CD?3 (and subsequent codes). Therefore, in particular, the overhead to CD?1 can be reduced.Type: GrantFiled: April 3, 2009Date of Patent: September 11, 2012Assignee: Renesas Electronics CorporationInventors: Takashi Endo, Toshio Okochi, Shunsuke Ota, Tatsuya Kameyama
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Publication number: 20120074361Abstract: Copper(II) acetate, zinc(II) acetate, and tin(IV) acetate are weighed so that the total amount of metal ions is 2.0×10?4 mol and the molar ratio of ions is Cu:Zn:Sn=2:1:1, and 2.0 cm3 of oleylamine is added to prepare a mixed solution. Apart from this, 1.0 cm3 of oleylamine is added to 2.0×10?4 mol of sulfur powder to prepare a mixed solution. These mixed solutions are separately heated at 60° C. and mixed at room temperature. The pressure in a test tube is reduced, followed by nitrogen filling. The test tube is heated at 240° C. for 30 minutes and then allowed to stand until room temperature. The resultant product is separated into a supernatant and precipitates by centrifugal separation. The separated supernatant is filtered, methanol is added to produce precipitates. The precipitates are dissolved by adding chloroform to prepare a semiconductor nanoparticle solution.Type: ApplicationFiled: February 25, 2010Publication date: March 29, 2012Applicants: National University Corporation Nagoya University, Tokyo University of Science Educational Foundation Administrative Organization, Osaka UniversityInventors: Tsukasa Torimoto, Ken-ichi Okazaki, Tatsuya Kameyama, Takaaki Osaki, Susumu Kuwabata, Akihiko Kudo
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Patent number: 8009827Abstract: An increase in safety from attacks by use of hardware-like methods by small-sized hardware is achieved. An encryption processing device includes a logical circuit capable of programmably setting logics for executing cipher processing, a memory that stores plural pieces of logical configuration information corresponding to an identical cipher processing algorithm, and a CPU that selectively sets plural logics corresponding to an identical cipher processing algorithm in the logical circuit. Even in processing using an identical cipher key, by changing the logic of the logical circuit for each processing, power consumption in cipher processing can be varied, and places a timing in which malfunctions occur can be varied. Moreover, an increase in the scale of hardware for realizing plural logics can be curbed.Type: GrantFiled: January 17, 2007Date of Patent: August 30, 2011Assignee: Hitachi, Ltd.Inventors: Toshio Okochi, Takashi Endo, Takashi Watanabe, Tatsuya Kameyama, Shunsuke Ota
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Patent number: 7664939Abstract: A program to be executed by a computer is divided into a plurality of code blocks, and, a unique code block ID is allotted to each code block. At the moment when the execution of the program is started, the code block ID corresponding to the execution start address is written in a memory, and in the case when the control transits from the code block to other code block, by use of code block operation values obtained beforehand from these two code block IDs thereof, the code block ID in the memory is updated, and it is judged whether the updated code block ID in the memory and the code block ID allotted to the code block as the execution objective are identical or not so that a control flow error is detected.Type: GrantFiled: April 12, 2007Date of Patent: February 16, 2010Assignee: Hitachi, Ltd.Inventors: Takashi Endo, Toshio Okochi, Takashi Watanabe, Shunsuke Ota, Tatsuya Kameyama
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Publication number: 20090254740Abstract: It is possible to achieve the protection of software with reduced overhead. For example, a memory for storing an encrypted code prepared in advance and a decryptor module for decrypting the code are provided. The decryptor module includes, for example, a three-stage pipeline and a selector for selecting one output from the outputs of each stage of the pipeline. When a branch instruction is issued and subsequent inputs of the pipeline are in the order of CD?1, CD?2, . . . , the decryptor module outputs a first decrypted code by performing a one-stage pipeline process to CD?1. Next, the decryptor module outputs a second decrypted code by performing a two-stage pipeline process to CD?2, and the decryptor module outputs a third decrypted code by performing a three-stage pipeline process to CD?3 (and subsequent codes). Therefore, in particular, the overhead to CD?1 can be reduced.Type: ApplicationFiled: April 3, 2009Publication date: October 8, 2009Inventors: Takashi Endo, Toshio Okochi, Shunsuke Ota, Tatsuya Kameyama
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Publication number: 20070255980Abstract: A program to be executed by a computer is divided into a plurality of code blocks, and, a unique code block ID is allotted to each code block. At the moment when the execution of the program is started, the code block ID corresponding to the execution start address is written in a memory, and in the case when the control transits from the code block to other code block, by use of code block operation values obtained beforehand from these two code block IDs thereof, the code block ID in the memory is updated, and it is judged whether the updated code block ID in the memory and the code block ID allotted to the code block as the execution objective are identical or not so that a control flow error is detected.Type: ApplicationFiled: April 12, 2007Publication date: November 1, 2007Inventors: Takashi ENDO, Toshio Okochi, Takashi Watanabe, Shunsuke Ota, Tatsuya Kameyama
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Publication number: 20070195949Abstract: An increase in safety from attacks by use of hardware-like methods by small-sized hardware is achieved. An encryption processing device includes a logical circuit capable of programmably setting logics for executing cipher processing, a memory that stores plural pieces of logical configuration information corresponding to an identical cipher processing algorithm, and a CPU that selectively sets plural logics corresponding to an identical cipher processing algorithm in the logical circuit. Even in processing using an identical cipher key, by changing the logic of the logical circuit for each processing, power consumption in cipher processing can be varied, and places a timing in which malfunctions occur can be varied. Moreover, an increase in the scale of hardware for realizing plural logics can be curbed.Type: ApplicationFiled: January 17, 2007Publication date: August 23, 2007Inventors: Toshio Okochi, Takashi Endo, Takashi Watanabe, Tatsuya Kameyama, Shunsuke Ota
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Patent number: 7136356Abstract: Flow identifier data of layered audiovisual data to be processed on the occurrence of congestion, as well as control code data for initiating or terminating the discard of packet data, is retained. When congestion occurs, selective transmission units perform discard initiation or termination on data having the flow identifier data indicating the layered audiovisual data retained, based on the control code data for performing the discard-initiating or -terminating operation of the packet data.Type: GrantFiled: March 16, 2001Date of Patent: November 14, 2006Assignee: Hitachi, Ltd.Inventors: Toshiaki Suzuki, Itaru Mimura, Tatsuya Kameyama
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Patent number: 6975645Abstract: When one-video program data (layer-coded data) of a plurality of layers is transmitted in a single channel, a video signal is layer-coded in an MPEG system, the layer-coded ES (Elementary Stream) data is converted to a PES (Packetized Elementary Stream) for each layer, and the PES is then converted to a RTP (Real-Time Protocol) packet, which is then converted to a UDP (User Datagram Protocol). An identifier is then annexed to a UDP packet data for each layer to form an IP (Internet Protocol) packet.Type: GrantFiled: July 28, 2000Date of Patent: December 13, 2005Assignee: Hitachi, Ltd.Inventors: Toshiaki Suzuki, Satoshi Yoshizawa, Mitsuru Ikezawa, Itaru Mimura, Tatsuya Kameyama