Patents by Inventor Kentaro Nakahara

Kentaro Nakahara 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).

  • Publication number: 20200359412
    Abstract: A communication unit according to the present disclosure includes a communication circuit section that transmits and receives data to and from at least one communication target unit over a period of a plurality of time segments each divided into a plurality of time slots, receives data transmitted from the communication target unit during a period of a time slot assigned to the communication target unit out of each of the communication target units, and transmits data to the at least one communication target unit during a period of a time slot that differs from the time slot assigned to the communication target unit out of each of the communication target units, and a controller that, in a case where the at least one communication target unit enters a sleep period during which the at least one communication target unit temporarily suspends transmission operation, controls, during the sleep period, the communication circuit section to transmit data during the period of the time slot assigned to the communicati
    Type: Application
    Filed: June 12, 2018
    Publication date: November 12, 2020
    Applicant: Sony Semiconductor Solutions Corporation
    Inventor: Kentaro NAKAHARA
  • Patent number: 10637054
    Abstract: The present invention relates to a lithium manganese composite oxide having a metal-containing compound film and a carbon coating, in which at least a part of a surface of the lithium manganese composite oxide represented by Formula (1) is coated with the metal-containing compound film, and at least a part of the surface thereof is further coated with the carbon coating. The present invention can provide a positive electrode material capable of improving the discharge characteristics and the capacity retention rate after cycles of lithium ion secondary batteries. Li1+x(FeyNizMn1?y?z)1?xO2??(1), where 0<x<?, 0?y, 0?z<0.5, and y+z<1.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: April 28, 2020
    Assignee: NEC Corporation
    Inventors: Ryota Yuge, Kentaro Nakahara, Sadanori Hattori
  • Patent number: 10608276
    Abstract: The present invention provides a novel carbon material comprising a three-dimensional graphene network constituting a plurality of cells interconnecting as a whole, where at least one of the cells has single-layer graphene wall. The carbon material is suitable for a lithium ion battery.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: March 31, 2020
    Assignee: NEC Corporation
    Inventors: Qian Cheng, Noriyuki Tamura, Kentaro Nakahara
  • Patent number: 10601043
    Abstract: The present invention provides an anode material for a lithium-ion battery comprising a carbon particle having a particle size of 5 ?m to 30 ?m, and including defective portions on a surface of the carbon particle, the defective portions being holes or pores formed by anodic oxidation of the carbon particle.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: March 24, 2020
    Assignee: NEC Corporation
    Inventors: Qian Cheng, Noriyuki Tamura, Kentaro Nakahara
  • Patent number: 10461885
    Abstract: The present technology relates to a communication system, and a transmission method that a restoration time from a state that a transmission of a signal between AC-coupled apparatuses is suspended can be shortened without increasing a power consumption. A first control signal is transmitted via the second signal line in a case where a transmission of the signal via the first signal line is restored from a suspended state, and that a transmission of a charging signal that charges an AC coupling capacitance serially connected to the first signal line via the first signal line is started before a timing when the transmission of the first control signal is ended. The present technology is applicable, for example, to a communication system in conformity with the eDP standard.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: October 29, 2019
    Assignee: Sony Corporation
    Inventors: Kentaro Nakahara, Hideyuki Matsumoto
  • Patent number: 10431825
    Abstract: The present invention relates to a negative electrode for a lithium ion secondary battery comprising an oxetane compound represented by a predetermined formula in an amount within a range of 0.001% by mass or more and 5.0% by mass or less based on the amount of a negative electrode active material, and a lithium ion secondary battery using the same.
    Type: Grant
    Filed: August 4, 2014
    Date of Patent: October 1, 2019
    Assignee: NEC CORPORATION
    Inventors: Midori Shimura, Noriyuki Tamura, Kentaro Nakahara
  • Patent number: 10340514
    Abstract: A negative electrode for a lithium ion secondary battery, including a negative electrode active material layer containing a negative electrode active material including silicon (Si) as a constituent element, in which a coating including iron (Fe), manganese (Mn) and oxygen (O) as constituent elements is formed on a surface of the negative electrode active material layer.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: July 2, 2019
    Assignee: NEC CORPORATION
    Inventors: Noriyuki Tamura, Ryota Yuge, Qian Cheng, Kentaro Nakahara
  • Publication number: 20190181978
    Abstract: A communication unit of the present disclosure includes a decoding section configured to decode transfer data transmitted from a communicated unit, by a first method using a first error detecting code, and a second method using at least an error correcting code, and a determination section that performs determination as to whether the transfer data are data in the first method including the first error detecting code or data in the second method including the error correcting code.
    Type: Application
    Filed: July 6, 2017
    Publication date: June 13, 2019
    Applicant: Sony Semiconductor Solutions Corporation
    Inventors: Tatsuki Amimoto, Ryoji Ikegaya, Kentaro Nakahara
  • Patent number: 10211929
    Abstract: [Object] To provide a device capable of implementing an extended association procedure that enables compatibility with the existing association procedures. [Solution] Provided is a device including: a determination unit configured to determine whether transmission timing of a first frame received from a communication terminal is a first timing in an intra-body communication system; and a timing decision unit configured to decide timing to transmit a second frame to the communication terminal on the basis of a determination result by the determination unit.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: February 19, 2019
    Assignee: SONY CORPORATION
    Inventors: Masanori Sato, Kentaro Nakahara
  • Patent number: 10164250
    Abstract: There is provided a lithium-iron-manganese-based composite oxide capable of providing a lithium-ion secondary battery which has a high capacity retention rate in charge/discharge cycles and in which the generation of a gas caused by charge/discharge cycles is reduced. A lithium-iron-manganese-based composite oxide having a layered rock-salt structure, wherein at least a part of the surface of a lithium-iron-manganese-based composite oxide represented by the following formula (1) is coated with an inorganic material: LixM1(y-p)MnpM2(z-p)FeqO(2-?) (1) (wherein 1.05?x?1.32, 0.33?y?0.63, 0.06?z?0.50, 0<p?0.63, 0.06?q?0.50, 0???0.80, y?p, and z?q; M1 is at least one element selected from Ti and Zr; and M2 is at least one element selected from the group consisting of Co, Ni and Mn).
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: December 25, 2018
    Assignees: NEC Corporation, Tanaka Chemical Corporation
    Inventors: Kentaro Nakahara, Ryota Yuge, Noriyuki Tamura, Sadanori Hattori, Kentaro Kuratani, Kyousuke Doumae, Hideka Shibuya, Mitsuharu Tabuchi
  • Patent number: 10069166
    Abstract: The present invention relates to a non-aqueous electrolyte solution characterized by containing at least one type of cyclic sulfonic acid ester compound represented by general formula (1). According to the present invention, a non-aqueous electrolyte solution capable of improving battery characteristics can be provided. (In the formula, R1 to R4 are each independently a hydrogen atom, a fluorine atom, an alkyl group having 1-6 carbon atoms or an alkoxy group having 1-6 carbon atoms, and Z is a substituted or unsubstituted alkylene group having 1-6 carbon atoms, a substituted or unsubstituted fluoroalkylene group having 1-6 carbon atoms, or a divalent organic group having 2-6 carbon atoms in which alkylene unit(s) or fluoroalkylene unit(s) are bonded via one or more ether bonds.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: September 4, 2018
    Assignee: NEC Corporation
    Inventors: Katsumi Maeda, Kentaro Nakahara
  • Publication number: 20180068633
    Abstract: The present technology relates to a transmission apparatus and a transmission method, a reception apparatus and a reception method, a transmission system, and a program by which the communication efficiency can be enhanced and power saving can be realized in transmitting and receiving additional data instead of audio data in addition to visible image data in a DisplayPort (trademark) standard. In the DisplayPort (trademark) standard, the visible image data is provided with a format by which audio data can be transmitted in addition to the visible image data. In transmitting other additional data by using this format for transmitting the audio data, a part of an error correction code included in the format is omitted if high reliability is not required unlike the audio data. The present technology is applicable to a display port.
    Type: Application
    Filed: March 10, 2016
    Publication date: March 8, 2018
    Inventors: Takashi Yokokawa, Kentaro Nakahara
  • Publication number: 20180034582
    Abstract: The present technology relates to a communication system, and a transmission method that a restoration time from a state that a transmission of a signal between AC-coupled apparatuses is suspended can be shortened without increasing a power consumption. A first control signal is transmitted via the second signal line in a case where a transmission of the signal via the first signal line is restored from a suspended state, and that a transmission of a charging signal that charges an AC coupling capacitance serially connected to the first signal line via the first signal line is started before a timing when the transmission of the first control signal is ended. The present technology is applicable, for example, to a communication system in conformity with the eDP standard.
    Type: Application
    Filed: March 4, 2016
    Publication date: February 1, 2018
    Inventors: Kentaro Nakahara, Hideyuki Matsumoto
  • Patent number: 9865872
    Abstract: The present invention relates to a lithium-ion battery. The lithium-ion battery comprises a positive electrode containing, as a principal component, a lithium oxide having a layered rock-salt structure and represented by chemical formula: LixM1yM2zO2-d. In this chemical formula, 1.16?x?1.32, 0.33?y?0.63, 0.06?z?0.50, M1 represents a metal ion selected from Mn, Ti and Zr, or a mixture thereof, and M2 represents a metal ion selected from Fe, Co, Ni and Mn, or a mixture thereof. The lithium-ion battery also comprises a negative electrode containing, as a principal component, a material capable of intercalating/deintercalating lithium ions, wherein peroxide ion(s) (O22?) are contained in the positive electrode.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: January 9, 2018
    Assignee: NEC Corporation
    Inventors: Kentaro Nakahara, Sadanori Hattori
  • Publication number: 20170346574
    Abstract: [Object] To provide a device capable of implementing an extended association procedure that enables compatibility with the existing association procedures. [Solution] Provided is a device including: a determination unit configured to determine whether transmission timing of a first frame received from a communication terminal is a first timing in an intra-body communication system; and a timing decision unit configured to decide timing to transmit a second frame to the communication terminal on the basis of a determination result by the determination unit.
    Type: Application
    Filed: November 6, 2015
    Publication date: November 30, 2017
    Inventors: MASANORI SATO, KENTARO NAKAHARA
  • Patent number: 9812735
    Abstract: A lithium ion secondary battery comprising: a positive electrode comprising a positive electrode active material; a negative electrode comprised mainly of a material capable of storing and releasing lithium ions; and an electrolytic liquid, the positive electrode active material being a lithium-iron-manganese complex oxide having a layered rock salt structure and represented by a chemical formula: LixFesM1(z-s)M2yO2-? wherein 1.05?x?1.32, 0.06?s?0.50, 0.06?z?0.50, 0.33?y?0.63, and 0???0.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: November 7, 2017
    Assignees: SEKISUI CHEMICAL CO., LTD., NEC CORPORATION
    Inventors: Masaru Heishi, Takuya Toyokawa, Katsumi Maeda, Noriyuki Tamura, Kentaro Nakahara
  • Publication number: 20170283265
    Abstract: The present invention provides a novel carbon material comprising a three-dimensional graphene network constituting a plurality of cells interconnecting as a whole, where at least one of the cells has single-layer graphene wall. The carbon material is suitable for a lithium ion battery.
    Type: Application
    Filed: August 29, 2014
    Publication date: October 5, 2017
    Inventors: Qian CHENG, Noriyuki TAMURA, Kentaro NAKAHARA
  • Publication number: 20170288224
    Abstract: The present invention provides an anode material for a lithium-ion battery comprising a carbon particle having a particle size of 5 ?m to 30 ?m, and including defective portions on a surface of the carbon particle, the defective portions being holes or pores formed by anodic oxidation of the carbon particle.
    Type: Application
    Filed: August 29, 2014
    Publication date: October 5, 2017
    Inventors: Qian CHENG, Noriyuki TAMURA, Kentaro NAKAHARA
  • Patent number: 9647269
    Abstract: In a secondary battery utilizing redox by a radical site, charge-discharge is carried out in such a manner that a lithium ion moves between a positive electrode and a negative electrode (rocking chair-type). An anion in an amount necessary for electrode doping during charge-discharge is made unnecessary, thereby reducing the amount of an electrolytic solution. A secondary battery with a large energy density is achieved. Provided is an electrode active material including at least one polymer including a radical site capable of being converted into a first cation, and an anion site capable of being bonded with the first cation or a second cation.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: May 9, 2017
    Assignee: NEC Corporation
    Inventors: Hiroyuki Nishide, Kenichi Oyaizu, Hiroki Yakushiji, Shigeyuki Iwasa, Kentaro Nakahara
  • Publication number: 20160322667
    Abstract: The present invention relates to a non-aqueous electrolyte solution characterized by containing at least one type of cyclic sulfonic acid ester compound represented by general formula (1). According to the present invention, a non-aqueous electrolyte solution capable of improving battery characteristics can be provided. (In the formula, R1 to R4 are each independently a hydrogen atom, a fluorine atom, an alkyl group having 1-6 carbon atoms or an alkoxy group having 1-6 carbon atoms, and Z is a substituted or unsubstituted alkylene group having 1-6 carbon atoms, a substituted or unsubstituted fluoroalkylene group having 1-6 carbon atoms, or a divalent organic group having 2-6 carbon atoms in which alkylene unit(s) or fluoroalkylene unit(s) are bonded via one or more ether bonds.
    Type: Application
    Filed: December 16, 2014
    Publication date: November 3, 2016
    Applicant: NEC Corporation
    Inventors: Katsumi MAEDA, Kentaro NAKAHARA