Patents by Inventor Kei Yonezawa

Kei Yonezawa 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).

  • Patent number: 9997803
    Abstract: Provided are an electrolyte having superior adhesion strength to an electrode and superior permeability into the electrode, and a battery using the electrolyte. An electrolyte comprises, for example, a high molecular weight compound and an electrolyte solution prepared by dissolving an electrolyte salt in a solvent, and the electrolyte is formed through applying a coating solution prepared by dissolving the high molecular weight compound in a mixed solvent to at least either a cathode or an anode. The high molecular weight compound includes a first high molecular weight compound with a weight-average molecular weight of 550,000 or more and a second high molecular weight compound with a weight-average molecular weight of 1,000 or more but not exceeding 300,000. Thereby, the adhesion strength of the electrolyte to the electrode, the permeability of the electrolyte into the electrode and the mechanical strength of the electrolyte can be improved, and the capability of holding a solvent can be improved.
    Type: Grant
    Filed: July 15, 2004
    Date of Patent: June 12, 2018
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Kei Yonezawa
  • Patent number: 9450244
    Abstract: A battery capable of improving load characteristics, low-temperature characteristics and high-temperature cycle characteristics is provided. A cathode (13) includes a lithium cobalt complex oxide represented by LiaCoxMIyMIIzO2 (MI includes at least one kind selected from the group consisting of Al, Cr, V, Mn and Fe, MII includes at least one kind selected from the group consisting of Mg and Ca, 0.9?a?1.1, 0.9?x<1, 0.001?y?0.05, 0.001?z?0.05, x+y+z=1), and further includes Zr as a sub-component element. The content of Zr is within a range from 0.01 mol % to 10 mol % both inclusive as a ratio (Zr/Co) of Zr to Co in the lithium cobalt complex oxide.
    Type: Grant
    Filed: March 28, 2006
    Date of Patent: September 20, 2016
    Assignee: Sony Corporation
    Inventors: Kei Yonezawa, Takashi Sato, Tsuyoshi Okawa, Yoshikatsu Yamamoto
  • Publication number: 20150326040
    Abstract: Charging equipment and a charge control unit are provided, in which a plurality of devices mounted with battery can be simultaneously charged by the single charging equipment. Further, a method of controlling charge and a method of receiving charge are also provided. The charging equipment supplies electric power to the battery for charging, comprising a power output part which outputs DC power used for charging, a plurality of user operation units which can be connected with a vehicle equipped with a battery as a device mounted with battery, and the charge control unit which controls a power supply from the power output part to the user operation unit. Herein, the charge control unit distributes the electric power outputted from the power output part to supply the distributed power to the user operation unit connected with the vehicle.
    Type: Application
    Filed: July 22, 2015
    Publication date: November 12, 2015
    Applicant: HITACHI, LTD.
    Inventors: Shoji Kawai, Tomoyuki Marui, Masami Takahashi, Kazumi Rissen, Takafumi Ebara, Kei Yonezawa, Yoshihito Nasu
  • Patent number: 9168841
    Abstract: Charging equipment and a charge control unit are provided, in which a plurality of devices mounted with battery can be simultaneously charged by the single charging equipment. Further, a method of controlling charge and a method of receiving charge are also provided. The charging equipment supplies electric power to the battery for charging, comprising a power output part which outputs DC power used for charging, a plurality of user operation units which can be connected with a vehicle equipped with a battery as a device mounted with battery, and the charge control unit which controls a power supply from the power output part to the user operation unit. Herein, the charge control unit distributes the electric power outputted from the power output part to supply the distributed power to the user operation unit connected with the vehicle.
    Type: Grant
    Filed: May 18, 2011
    Date of Patent: October 27, 2015
    Assignee: HITACHI, LTD.
    Inventors: Shoji Kawai, Tomoyuki Marui, Masami Takahashi, Kazumi Rissen, Takafumi Ebara, Kei Yonezawa, Yoshihito Nasu
  • Patent number: 8197968
    Abstract: A cathode contains: a lithium cobalt composite oxide expressed by LixCoaM1bM2cO2, where M1 denotes the first element; M2 indicates the second element; x, a, b, and c are set to values within ranges of 0.9?x?1.1, 0.9?a?1, 0.001?b?0.05, and 0.001?c?0.05; and a+b+c=1; a first sub-component element of at least one kind selected from a group containing Ti, Zr, and Hf, and a second sub-component element of at least one kind selected from a group containing Si, Ge, and Sn. 0.01 mol %?(content of the first sub-component element)?10 mol % as a ratio to cobalt in the lithium cobalt composite oxide. 0.01 mol %?(content of the second sub-component element)?10 mol % as a ratio to cobalt in the lithium cobalt composite oxide.
    Type: Grant
    Filed: May 1, 2007
    Date of Patent: June 12, 2012
    Assignee: Sony Corporation
    Inventors: Takahisa Ishimatsu, Kei Yonezawa, Takashi Sato, Masumi Terauchi, Yoshikatsu Yamamoto
  • Publication number: 20110285345
    Abstract: Charging equipment and a charge control unit are provided, in which a plurality of devices mounted with battery can be simultaneously charged by the single charging equipment. Further, a method of controlling charge and a method of receiving charge are also provided. The charging equipment supplies electric power to the battery for charging, comprising a power output part which outputs DC power used for charging, a plurality of user operation units which can be connected with a vehicle equipped with a battery as a device mounted with battery, and the charge control unit which controls a power supply from the power output part to the user operation unit. Herein, the charge control unit distributes the electric power outputted from the power output part to supply the distributed power to the user operation unit connected with the vehicle.
    Type: Application
    Filed: May 18, 2011
    Publication date: November 24, 2011
    Inventors: Shoji Kawai, Tomoyuki Marui, Masami Takahashi, Kazumi Rissen, Takafumi Ebara, Kei Yonezawa, Yoshihito Nasu
  • Patent number: 7525437
    Abstract: Information optimal for a place where a user is located is provided to the user by specifying the place in a short range using RFID tags and a terminal which the user holds. To accomplish this, an RFID reader-equipped information terminal performs a process of reading RFID tags attached to arbitrary places a predetermined number of times per unit time and automatically measures a distance between the RFID reader-equipped information terminal and each RFID tag based on the number of times each responding RFID tag has been able to be read. A position at which the user is located is specified based on the automatically measured distance and information suitable for the position is then provided to the user.
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: April 28, 2009
    Assignee: Hitachi, Ltd.
    Inventors: Daisuke Takeuchi, Kei Yonezawa, Shuji Terada
  • Publication number: 20090004567
    Abstract: A battery capable of improving load characteristics, low-temperature characteristics and high-temperature cycle characteristics is provided. A cathode (13) includes a lithium cobalt complex oxide represented by LiaCoxMIyMIIzO2 (MI includes at least one kind selected from the group consisting of Al, Cr, V, Mn and Fe, MII includes at least one kind selected from the group consisting of Mg and Ca, 0.9?a?1.1, 0.9?x<1, 0.001?y?0.05, 0.001?z?0.05, x+y+z=1), and further includes Zr as a sub-component element. The content of Zr is within a range from 0.01 mol % to 10 mol % both inclusive as a ratio (Zr/Co) of Zr to Co in the lithium cobalt complex oxide.
    Type: Application
    Filed: March 28, 2006
    Publication date: January 1, 2009
    Applicant: SONY CORPORATION
    Inventors: Kei Yonezawa, Takashi Sato, Tsuyoshi Okawa, Yoshikatsu Yamamoto
  • Patent number: 7442469
    Abstract: A cathode with a cathode active material is provided. The cathode active material is obtained by mixing a zirconium-containing lithium cobalt composite oxide containing zirconium as a sub-component element in a first lithium cobalt composite oxide expressed by a formula LitCoMsO2 (where M is at least one kind of element selected from Fe, V, Cr, Ti, Mg, Al, B, and Ca; 0?s?0.03; 0.05?t?1.15), and a second lithium cobalt composite oxide expressed by a formula LixCol-yAyO2 (where A is at least one kind of element selected from Mg and Al; 0.05?x?1.15; 0?y?0.03).
    Type: Grant
    Filed: February 13, 2007
    Date of Patent: October 28, 2008
    Assignee: Sony Corporation
    Inventors: Takashi Sato, Takahisa Ishimatsu, Kei Yonezawa, Yoshikatsu Yamamoto
  • Publication number: 20080151163
    Abstract: An optical compensation panel is disclosed. The optical compensation panel includes a first optical compensation layer, a second optical compensation layer and an adhesive layer for bonding the first optical compensation layer and the second optical compensation layer so as to face each other, wherein the adhesive layer is made of a photopolymerization material, photopolymerization of which is started by a photopolymerization initiator upon irradiation with light, with the photopolymerization initiator being contained in an amount of from 2 to 5% by weight relative to the photopolymerization material in starting the photopolymerization, and the adhesive layer is formed so as to have a rate of change in glass transition temperature of the adhesive layer falling within 150% and a rate of change in weight of the adhesive layer falling within 5% before and after an annealing treatment.
    Type: Application
    Filed: November 30, 2007
    Publication date: June 26, 2008
    Applicant: SONY CORPORATION
    Inventors: Toshinobu Sekiuchi, Kei Yonezawa
  • Publication number: 20070275303
    Abstract: A cathode contains: a lithium cobalt composite oxide expressed by LixCoaM1bM2cO2, where M1 denotes the first element; M2 indicates the second element; x, a, b, and c are set to values within ranges of 0.9?x?1.1, 0.9?a?1, 0.001?b?0.05, and 0.001?c?0.05; and a+b+c=1; a first sub-component element of at least one kind selected from a group containing Ti, Zr, and Hf, and a second sub-component element of at least one kind selected from a group containing Si, Ge, and Sn. 0.01 mol %?(content of the first sub-component element)?10 mol % as a ratio to cobalt in the lithium cobalt composite oxide. 0.01 mol %?(content of the second sub-component element)?10 mol % as a ratio to cobalt in the lithium cobalt composite oxide.
    Type: Application
    Filed: May 1, 2007
    Publication date: November 29, 2007
    Applicant: SONY CORPORATION
    Inventors: Takahisa Ishimatsu, Kei Yonezawa, Takashi Sato, Masumi Terauchi, Yoshikatsu Yamamoto
  • Publication number: 20070229265
    Abstract: Information optimal for a place where a user is located is provided to the user by specifying the place in a short range using RFID tags and a terminal which the user holds. To accomplish this, an RFID reader-equipped information terminal performs a process of reading RFID tags attached to arbitrary places a predetermined number of times per unit time and automatically measures a distance between the RFID reader-equipped information terminal and each RFID tag based on the number of times each responding RFID tag has been able to be read. A position at which the user is located is specified based on the automatically measured distance and information suitable for the position is then provided to the user.
    Type: Application
    Filed: November 20, 2006
    Publication date: October 4, 2007
    Applicant: Hitachi, Ltd.
    Inventors: Daisuke Takeuchi, Kei Yonezawa, Shuji Terada
  • Publication number: 20070190421
    Abstract: A cathode with a cathode active material is provided. The cathode active material is obtained by mixing a zirconium-containing lithium cobalt composite oxide containing zirconium as a sub-component element in a first lithium cobalt composite oxide expressed by a formula LitCoMsO2 (where M is at least one kind of element selected from Fe, V, Cr, Ti, Mg, Al, B, and Ca; 0?s?0.03; 0.05?t?1.15), and a second lithium cobalt composite oxide expressed by a formula LixCo1-yAyO2 (where A is at least one kind of element selected from Mg and Al; 0.05?x?1.15; 0?y?0.03).
    Type: Application
    Filed: February 13, 2007
    Publication date: August 16, 2007
    Applicant: Sony Corporation
    Inventors: Takashi Sato, Takahisa Ishimatsu, Kei Yonezawa, Yoshikatsu Yamamoto
  • Patent number: 7157188
    Abstract: A battery wherein a cathode and an anode are layered and wound with a separator and an electrolyte in between them. The electrolyte is formed by firstly forming a coating layer containing a high molecular weight compound, a high viscosity solvent having a boiling point of more than 150° C., and an electrolyte salt on the cathode and the anode, and then injecting an injection solution containing a low viscosity solvent having a boiling point of 150° C., or less in the coating layer. A concentration of the low viscosity solvent in the electrolyte changes in the facing direction of the cathode and the anode. The concentration of the low viscosity solvent in the electrolyte is higher between the cathode and the anode, than on the cathode side and the anode side. Therefore, a diffusion rate of lithium ions is raised, and overvoltage is reduced.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: January 2, 2007
    Assignee: Sony Corporation
    Inventors: Akira Yamaguchi, Kei Yonezawa
  • Publication number: 20050048374
    Abstract: Provided are an electrolyte having superior adhesion strength to an electrode and superior permeability into the electrode, and a battery using the electrolyte. An electrolyte comprises, for example, a high molecular weight compound and an electrolyte solution prepared by dissolving an electrolyte salt in a solvent, and the electrolyte is formed through applying a coating solution prepared by dissolving the high molecular weight compound in a mixed solvent to at least either a cathode or an anode. The high molecular weight compound includes a first high molecular weight compound with a weight-average molecular weight of 550,000 or more and a second high molecular weight compound with a weight-average molecular weight of 1,000 or more but not exceeding 300,000. Thereby, the adhesion strength of the electrolyte to the electrode, the permeability of the electrolyte into the electrode and the mechanical strength of the electrolyte can be improved, and the capability of holding a solvent can be improved.
    Type: Application
    Filed: July 15, 2004
    Publication date: March 3, 2005
    Inventor: Kei Yonezawa
  • Publication number: 20040234866
    Abstract: The invention provides a battery which has both excellent high load characteristics and low temperature characteristics. The battery comprises a battery device, wherein a cathode and an anode are layered and wound with a separator and an electrolyte in between. The electrolyte is formed by firstly forming coating layer containing a high molecular weight compound, a high viscosity solvent having a boiling point of more than 150° C., and an electrolyte salt on the cathode and the anode, and then injecting an injection solution containing a low viscosity solvent having a boiling point of 150° C., or less in the coating layer. A concentration of the low viscosity solvent in the electrolyte changes in the facing direction of the cathode and the anode. The concentration of the low viscosity solvent in the electrolyte is higher between the cathode and the anode, than on the cathode side and the anode side. Therefore, a diffusion rate of lithium ions is raised, and overvoltage is reduced.
    Type: Application
    Filed: March 2, 2004
    Publication date: November 25, 2004
    Inventors: Akira Yamaguchi, Kei Yonezawa
  • Patent number: 6679423
    Abstract: An electronic-money collecting system is capable of returning a lost IC card used as an ‘electronic purse’ to a legitimate owner or an issuing institution with a high degree of efficiency. When a lost IC card containing data representing electronic money is found, the finder inserts the card into a public terminal, and information read from the card is transmitted to a card center by way of a communication line. At the center, a storage unit containing identification and contact data is searched for owner contact data, and the owner of the lost IC card is notified of the implementation of processing to collect the IC card. Also, a finder is given reward money recorded in a found IC card or, when an attempt made by a finder to illegally draw money, information on the finder is recorded, allowing abuse of a found IC card to be detected early.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: January 20, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Makoto Ijichi, Shigeyuki Itoh, Masaaki Hiroya, Hiroshi Asao, Naomi Sato, Kei Yonezawa
  • Publication number: 20030033390
    Abstract: A program distribution system includes a program transmitting device configured to transmit a program content to a remote location. A viewer terminal device is configured to receive the transmitted program content and output the content to a display. The viewer terminal device is further configured to provide a viewer with a choice of viewing the content in a first viewing setting or a second viewing setting. The first viewing setting displays one or more commercials at predetermined time intervals. The second viewing setting displays the one or more commercials at different times than the predetermined time intervals.
    Type: Application
    Filed: April 16, 2002
    Publication date: February 13, 2003
    Applicant: Hitachi, Seisakusho Corp., Ltd.
    Inventors: Kei Yonezawa, Kou Sugawara, Kazumi Rissen
  • Publication number: 20020125311
    Abstract: The present invention relates to an electronic-money collecting system capable of returning a lost IC card used as an ‘electronic purse’ to the owner of the lost IC card or an institution issuing the lost IC card with a high degree of efficiency without giving a troublesome load to the lost-IC-card finder or the institution issuing the IC card. When a lost IC card in which money data representing the amount of electronic money is stored is found, the found IC card is entered to a terminal installed at places such as a banking organ or a public institution. At that time, information read out from the IC card is transmitted to a center apparatus by way of a communication line. At the center apparatus, a storage unit is searched for information on the legitimate owner of the IC card such as information for contacting the owner.
    Type: Application
    Filed: June 13, 2001
    Publication date: September 12, 2002
    Applicant: Hitachi, Ltd.
    Inventors: Makoto Ijichi, Shigeyuki Itoh, Masaaki Hiroya, Hiroshi Asao, Naomi Sato, Kei Yonezawa
  • Patent number: 6273334
    Abstract: An electronic-money collecting system is capable of returning a lost IC card used as an ‘electronic purse’ to the owner of the lost IC card or an institution issuing the lost IC card with a high degree of efficiency without imposing a burden on the lost-IC-card finder or the institution issuing the IC card. When a lost IC card in which money data representing the amount of electronic money stored on the card is found, the found IC card is inserted into a terminal installed at places, such as a banking organization or a public institution. At that time, information read out from the IC card is transmitted to a center by way of a communication line. At the center, a storage unit is searched for information on the legitimate owner of the IC card. owner. The owner of the lost IC card is then notified.
    Type: Grant
    Filed: June 15, 1999
    Date of Patent: August 14, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Makoto Ijichi, Shigeyuki Itoh, Masaaki Hiroya, Hiroshi Asao, Naomi Sato, Kei Yonezawa