Patents by Inventor Yasuyuki Takahashi

Yasuyuki Takahashi 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: 9424923
    Abstract: A semiconductor storage device with a novel structure, which can retain stored data even when power is not supplied (i.e., is non-volatile) and has no limitation on the number of write cycles. The semiconductor storage device includes a memory cell array in which a plurality of memory cells are arranged in matrix, a decoder configured to select a memory cell to operate among the plurality of memory cells in accordance with a control signal, and a control circuit configured to select whether to output the control signal to the decoder. In each of the plurality of memory cells, data is held by turning off a selection transistor whose channel region is formed with an oxide semiconductor.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: August 23, 2016
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shuhei Nagatsuka, Yasuyuki Takahashi
  • Publication number: 20160185248
    Abstract: A battery control system connected to a battery, which controls charge/discharge at the battery, includes: a current detection unit that measures a current value by detecting a charge/discharge current flowing through the battery; a voltage detection unit that detects a voltage at the battery; a temperature detection unit that detects a temperature at the battery; an effective current value calculation unit that calculates, based upon the current value measured by the current detection unit, an effective current value in a predetermined time window; and a charge/discharge restriction unit that imposes a first charge/discharge restriction so as to restrict the charge/discharge current based upon the effective current value calculated by the effective current value calculation unit.
    Type: Application
    Filed: July 25, 2014
    Publication date: June 30, 2016
    Applicants: HITACHI AUTOMOTIVE SYSTEMS, LTD., NISSAN MOTOR CO., LTD.
    Inventors: Yoshinori AOSHIMA, Hiroshi MORIKAWA, Masayuki TAKADA, Kenichiro TSURU, Shigeyuki KIYOTA, Yoshiyuki TANAKA, Toyoki IGUCHI, Hiroaki HASHIMOTO, Yasuyuki TAKAHASHI
  • Publication number: 20160185238
    Abstract: A battery control system connected to a battery, which controls charge/discharge at the battery, includes: a current detection unit that measures a current value by detecting a charge/discharge current flowing through the battery; a voltage detection unit that detects a voltage at the battery; a temperature detection unit that detects a temperature at the battery; an effective current value calculation unit that calculates, based upon the current value measured by the current detection unit, an effective current value in a predetermined time window; a time ratio calculation unit that determines a time ratio indicating a ratio of a length of time over which the effective current value has been in excess of a predetermined allowable value during a predetermined specified time period; and a charge/discharge restriction unit that restricts the charge/discharge current based upon the time ratio determined by the time ratio calculation unit.
    Type: Application
    Filed: July 25, 2014
    Publication date: June 30, 2016
    Applicants: HITACHI AUTOMOTIVE SYSTEMS, LTD., NISSAN MOTOR CO., LTD.
    Inventors: Hiroshi MORIKAWA, Yoshinori AOSHIMA, Masayuki TAKADA, Kenichiro TSURU, Shigeyuki KIYOTA, Yoshiyuki TANAKA, Toyoki IGUCHI, Hiroaki HASHIMOTO, Yasuyuki TAKAHASHI
  • Publication number: 20160176308
    Abstract: A battery control system connected to a battery, which controls charge/discharge at the battery, includes: a current detection unit that measures a current value by detecting a charge/discharge current flowing through the battery; a voltage detection unit that detects a voltage at the battery; a temperature detection unit that detects a temperature at the battery; a temperature history recording unit that records temperature history pertaining to the temperature detected by the temperature detection unit; and a charge/discharge restriction unit that restricts the charge/discharge current in a low-temperature state based upon the temperature history recorded by the temperature history recording unit.
    Type: Application
    Filed: July 25, 2014
    Publication date: June 23, 2016
    Applicants: HITACHI AUTOMOTIVE SYSTEMS, LTD., NISSAN MOTOR CO., LTD.
    Inventors: Hiroshi MORIKAWA, Yoshinori AOSHIMA, Masayuki TAKADA, Kenichiro TSURU, Shigeyuki KIYOTA, Yoshiyuki TANAKA, Toyoki IGUCHI, Hiroaki HASHIMOTO, Yasuyuki TAKAHASHI
  • Publication number: 20160163720
    Abstract: A semiconductor device including a memory cell is provided. The memory cell comprises a transistor, a memory element and a capacitor. One of first and second electrodes of the memory element and one of first and second electrodes of the capacitor are formed by a same metal film. The metal film functioning as the one of first and second electrodes of the memory element and the one of first and second electrodes of the capacitor is overlapped with a film functioning as the other of first and second electrodes of the capacitor.
    Type: Application
    Filed: August 29, 2014
    Publication date: June 9, 2016
    Inventors: Takayuki Abe, Yasuyuki Takahashi
  • Patent number: 9224251
    Abstract: A gateway device includes a request receiving portion, a request storage, a request conversion portion, a request transmitting portion, a response receiving portion, a response storage, a response conversion portion, and a response transmitting portion. When receiving, from a first diagnosis purpose tool, a diagnosis request for performing a malfunction diagnosis to an ECU equipped to a vehicle, the gateway device relays a diagnosis request and a diagnosis response between the first diagnosis purpose tool and the ECU. When receiving, from a second diagnosis purpose tool, a diagnosis request for performing a malfunction diagnosis to the ECU equipped to the vehicle, the gateway device relays a diagnosis request and a diagnosis response between the second diagnosis purpose tool and the ECU after converting identification informations of the diagnosis request and the diagnosis response.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: December 29, 2015
    Assignee: DENSO CORPORATION
    Inventors: Yuzo Harata, Mitsuyoshi Natsume, Yasuyuki Takahashi
  • Patent number: 9219802
    Abstract: An in-vehicle system comprising a gateway between multiple networks is disclosed. One of the networks specifies that when a source apparatus connected to the one of the networks sends a request message to a destination apparatus connected to another one of the networks, the source apparatus should time-out if the source apparatus does not receive a response message within a specified time after sending the request message. Upon receipt of the request message, the gateway relays the request message to the destination apparatus and sends a wait request code to the source apparatus to instruct the source apparatus to wait by extending the specified time.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: December 22, 2015
    Assignee: DENSO CORPORATION
    Inventors: Takeshi Enosaki, Masaya Ohi, Yuzo Harata, Yasuyuki Takahashi, Hideki Yakabe
  • Publication number: 20150301822
    Abstract: A gateway ECU includes an update condition table that indicates a vehicle load state capable of updating an ECU program corresponding to each of several ECUs. The gateway ECU wirelessly communicates with an external center apparatus to receive an update file. The gateway ECU uses the update condition table to determine whether the current vehicle load state equals a lightly loaded state capable of updating an ECU program or a heavily loaded state incapable of updating an ECU program. If the current vehicle load state is determined to equal the lightly loaded state, the gateway ECU updates an ECU program using the update file received from the center apparatus. If the current vehicle load state is determined to equal the heavily loaded state, the gateway ECU performs environment improvement control based on the update condition table to change the current vehicle load state to the lightly loaded state.
    Type: Application
    Filed: November 5, 2013
    Publication date: October 22, 2015
    Inventors: Yasuyuki TAKAHASHI, Yuzo HARATA, Takao MORI, Masaya OHI
  • Patent number: 9165632
    Abstract: Provided is a memory device with reduced overhead power. A memory device includes a first circuit retaining data in a first period during which a power supply voltage is supplied; a second circuit saving the data retained in the first circuit in the first period and retaining the data saved from the first circuit in a second period during which the power supply voltage is not supplied; and a third circuit saving the data retained in the second circuit in the second period and retaining the data saved from the second circuit in a third period during which the power supply voltage is not supplied. The third circuit includes a transistor in which a channel formation region is provided in an oxide semiconductor film and a capacitor to which a potential corresponding to the data is supplied through the transistor.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: October 20, 2015
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kiyoshi Kato, Takuro Ohmaru, Yasuyuki Takahashi
  • Patent number: 9153313
    Abstract: The first circuit has a function of retaining data in a first period during which a power supply voltage is supplied. The second circuit has functions of saving the data retained in the first circuit in the first period and retaining the data saved from the first circuit in a second period during which application of the power supply voltage is stopped. The third circuit has functions of saving the data retained in the second circuit in the second period and retaining the data saved from the second circuit in a third period during which application of the power supply voltage is stopped. The second circuit is capable of being written with the data for a shorter time than the third circuit. The third circuit is capable of maintaining the data for a longer time than the second circuit.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: October 6, 2015
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kiyoshi Kato, Takuro Ohmaru, Yasuyuki Takahashi
  • Publication number: 20150281022
    Abstract: A gateway device includes a request receiving portion receiving, from diagnosis purpose tools, diagnosis requests for performing malfunction diagnosis to an ECU of a vehicle, an outputting portion outputting the diagnosis request to an in-vehicle LAN, a response receiving portion receiving a diagnosis response output from the ECU to the in-vehicle LAN as a response to the diagnosis request, a transmitting portion transmitting the diagnosis response to corresponding diagnosis purpose tool, and an arbitration portion.
    Type: Application
    Filed: October 4, 2013
    Publication date: October 1, 2015
    Inventors: Yuzo Harata, Mitsuyoshi Natsume, Yasuyuki Takahashi
  • Publication number: 20150254909
    Abstract: A gateway device includes a request receiving portion, a request storage, a request conversion portion, a request transmitting portion, a response receiving portion, a response storage, a response conversion portion, and a response transmitting portion. When receiving, from a first diagnosis purpose tool, a diagnosis request for performing a malfunction diagnosis to an ECU equipped to a vehicle, the gateway device relays a diagnosis request and a diagnosis response between the first diagnosis purpose tool and the ECU. When receiving, from a second diagnosis purpose tool, a diagnosis request for performing a malfunction diagnosis to the ECU equipped to the vehicle, the gateway device relays a diagnosis request and a diagnosis response between the second diagnosis purpose tool and the ECU after converting identification informations of the diagnosis request and the diagnosis response.
    Type: Application
    Filed: October 4, 2013
    Publication date: September 10, 2015
    Applicant: DENSO CORPORATION
    Inventors: Yuzo Harata, Mitsuyoshi Natsume, Yasuyuki Takahashi
  • Patent number: 9129667
    Abstract: A semiconductor device in which a nonvolatile memory can normally operate and power saving can be performed with a P-state function, and a driving method of the semiconductor device are provided. The semiconductor device includes: a first circuit configured to control a state including a driving voltage and a clock frequency of a processor core; a first memory circuit and a second memory circuit which store state data; a second circuit generating a power supply voltage and a third circuit generating a clock which are electrically connected to the first circuit; and the processor core electrically connected to the second circuit and the third circuit through a switch. The processor cores includes: a volatile memory; and a nonvolatile memory transmitting and receiving data to/from the first memory.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: September 8, 2015
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yasuyuki Takahashi, Seiichi Yoneda
  • Patent number: 9058047
    Abstract: Provided is a startup circuit which allows a reference voltage generating circuit to start up and reach a stable equilibrium state in an extremely short period. The startup circuit is configured to hold voltage which is substantially the same as internal voltage of the reference voltage generating circuit in the stable equilibrium state even when power is not supplied to the startup circuit. The voltage is output from the startup circuit to the reference voltage generation circuit when the reference voltage generating circuit is started.
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: June 16, 2015
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Yasuyuki Takahashi
  • Patent number: 9038132
    Abstract: A bus monitoring security device is connected to a bus, which includes a tool side bus having a tool connection terminal and an ECU side bus. The ECU side bus is coupled with an ECU, and the tool side bus is coupled with a tool capable of communicating with the ECU via the tool connection terminal. The tool side bus and the ECU side bus are separately coupled with the bus monitoring security device. The bus monitoring security device includes: a controller for determining whether the tool being to access the ECU is connected to the ECU side bus, and for restricting transmission and reception of data between the tool and the ECU when the controller determines that the tool is connected to the ECU side bus.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: May 19, 2015
    Assignee: DENSO CORPORATION
    Inventors: Yuzo Harata, Yasuyuki Takahashi, Satoshi Suzuki, Mitsuyoshi Natsume, Tomohisa Kishigami
  • Patent number: 8873308
    Abstract: A signal processing circuit that consumes less power by stop of supply of power for a short time. In a storage element, before supply of power is stopped, data in a first storage circuit is stored to a second storage circuit, and the data is read from the second storage circuit and a verification circuit can determine whether or not the data in the second storage circuit matches the data in the first storage circuit. After supply of power is restarted, the data in the second storage circuit is stored to the first storage circuit, and the verification circuit can determine whether or not the data in the second storage circuit matches the data in the first storage circuit. In such a manner, verification can be performed without requiring a time for verification.
    Type: Grant
    Filed: June 21, 2013
    Date of Patent: October 28, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Seiichi Yoneda, Atsuo Isobe, Yuji Iwaki, Koichiro Kamata, Yasuyuki Takahashi, Masumi Nomura
  • Publication number: 20140293711
    Abstract: The first circuit has a function of retaining data in a first period during which a power supply voltage is supplied. The second circuit has functions of saving the data retained in the first circuit in the first period and retaining the data saved from the first circuit in a second period during which application of the power supply voltage is stopped. The third circuit has functions of saving the data retained in the second circuit in the second period and retaining the data saved from the second circuit in a third period during which application of the power supply voltage is stopped. The second circuit is capable of being written with the data for a shorter time than the third circuit. The third circuit is capable of maintaining the data for a longer time than the second circuit.
    Type: Application
    Filed: March 24, 2014
    Publication date: October 2, 2014
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Kiyoshi Kato, Takuro Ohmaru, Yasuyuki Takahashi
  • Publication number: 20140277925
    Abstract: A vehicular system includes a master ECU, a first slave ECU, and a second slave ECU. The second slave ECU transmits a storing request to the master ECU on detection of a malfunction. The master ECU transmits a storing instruction for causing diagnostic information to be stored, on reception of the storing request. The first slave ECU generates diagnostic information on the first slave ECU, on reception of the storing instruction from the master ECU. The first slave ECU further stores the generated diagnostic information in a retention storage medium. The retention storage medium is configured to retain validity determination information in a condition where the first slave ECU is not supplied with electric power source.
    Type: Application
    Filed: May 28, 2014
    Publication date: September 18, 2014
    Applicant: DENSO CORPORATION
    Inventors: Masahiko TANAKA, Mitsuyoshi NATSUME, Yasuyuki TAKAHASHI, Yuzo HARATA
  • Patent number: 8822996
    Abstract: A semiconductor device including a memory cell is provided. The memory cell comprises a transistor, a memory element and a capacitor. One of first and second electrodes of the memory element and one of first and second electrodes of the capacitor are formed by a same metal film. The metal film functioning as the one of first and second electrodes of the memory element and the one of first and second electrodes of the capacitor is overlapped with a film functioning as the other of first and second electrodes of the capacitor.
    Type: Grant
    Filed: September 14, 2009
    Date of Patent: September 2, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Takayuki Abe, Yasuyuki Takahashi
  • Patent number: 8825943
    Abstract: In a semiconductor device including a control circuit and a memory, the memory includes at least a sector for preventing additional writing and an information sector. When data for preventing additional writing is written to the sector for preventing additional writing and information is written to the information sector which is electrically connected to the sector for preventing additional writing, additional writing to the information sector is impossible.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: September 2, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Masato Ishii, Yasuyuki Takahashi, Takuro Ohmaru, Hidetomo Kobayashi, Yutaka Shionoiri