Patents by Inventor Takahiro Kawata

Takahiro Kawata 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: 11708801
    Abstract: Provided is a load drive device capable of diagnosing a failure of an output terminal of the load drive device before a charging voltage stabilizes in a configuration in which a capacitor is connected to an output terminal of the load drive device that drives an inductive load. In the load drive device according to the present invention, a capacitor is connected between a load terminal and a ground terminal, and the presence or absence of a failure of the load terminal is diagnosed on the basis of a current flowing between an internal power supply included in a diagnosis circuit and the load terminal.
    Type: Grant
    Filed: January 24, 2020
    Date of Patent: July 25, 2023
    Assignee: Hitachi Astemo, Ltd.
    Inventors: Takuya Arafune, Takahiro Kawata, Takumi Masubuchi
  • Publication number: 20220049669
    Abstract: Provided is a load drive device capable of diagnosing a failure of an output terminal of the load drive device before a charging voltage stabilizes in a configuration in which a capacitor is connected to an output terminal of the load drive device that drives an inductive load. In the load drive device according to the present invention, a capacitor is connected between a load terminal and a ground terminal, and the presence or absence of a failure of the load terminal is diagnosed on the basis of a current flowing between an internal power supply included in a diagnosis circuit and the load terminal.
    Type: Application
    Filed: January 24, 2020
    Publication date: February 17, 2022
    Inventors: Takuya ARAFUNE, Takahiro KAWATA, Takumi MASUBUCHI
  • Patent number: 10587263
    Abstract: Provided are a load drive apparatus in which a semiconductor chip using DTI for inter-element separation is mounted, the load drive apparatus being capable of diagnosing a dielectric strength voltage of the DTI and highly reliable and a failure diagnosis method of the load drive apparatus. There is provided a load drive apparatus in which a semiconductor chip is mounted. The semiconductor chip includes a load drive output unit formed on a semiconductor substrate. The load drive output unit has a first region where an MOSFET that controls load driving is formed and a second region insulated and separated by DTI from the first region and includes a first leakage current detection element provided in the first region, a second leakage current detection element provided in the second region, and a failure detection unit that determines a failure of the load drive output unit.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: March 10, 2020
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Takahiro Kawata, Yoichiro Kobayashi, Mitsuhiko Watanabe
  • Publication number: 20190305772
    Abstract: Provided are a load drive apparatus in which a semiconductor chip using DTI for inter-element separation is mounted, the load drive apparatus being capable of diagnosing a dielectric strength voltage of the DTI and highly reliable and a failure diagnosis method of the load drive apparatus. There is provided a load drive apparatus in which a semiconductor chip is mounted. The semiconductor chip includes a load drive output unit formed on a semiconductor substrate. The load drive output unit has a first region where an MOSFET that controls load driving is formed and a second region insulated and separated by DTI from the first region and includes a first leakage current detection element provided in the first region, a second leakage current detection element provided in the second region, and a failure detection unit that determines a failure of the load drive output unit.
    Type: Application
    Filed: November 6, 2017
    Publication date: October 3, 2019
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Takahiro KAWATA, Yoichiro KOBAYASHI, Mitsuhiko WATANABE
  • Patent number: 9780773
    Abstract: Provided is a load drive slope control device that can reduce EMI noise, and power loss and heat generation when a drive transistor is turned on and off, and can prevent excessive high temperature-induced damage to the drive transistor at an excessive high temperature.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: October 3, 2017
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Takahiro Kawata, Ryoichi Oura, Masahito Sonehara, Yoshitaka Abe, Takeo Yamashita
  • Patent number: 9748537
    Abstract: There is provided a highly reliable storage battery apparatus which can diagnose the status of a temperature detection unit and a cooling unit. In the storage battery apparatus comprising a battery module including one or more batteries, a plurality of temperature detection units and a cooling unit cooling the battery module, the temperature detection units measure, at least, the temperature of the cooling medium inputted to the storage battery apparatus, the temperature of the cooling medium outputted from the storage battery apparatus, and the temperature of at least one of the batteries and the battery module.
    Type: Grant
    Filed: August 10, 2007
    Date of Patent: August 29, 2017
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Akihiko Emori, Youhei Kawahara, Takahiro Kawata, Akihiko Kudo
  • Publication number: 20150381159
    Abstract: Provided is a load drive slope control device that can reduce EMI noise, and power loss and heat generation when a drive transistor is turned on and off, and can prevent excessive high temperature-induced damage to the drive transistor at an excessive high temperature.
    Type: Application
    Filed: December 13, 2013
    Publication date: December 31, 2015
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Takahiro KAWATA, Ryoichi OURA, Masahito SONEHARA, Yoshitaka ABE, Takeo YAMASHITA
  • Patent number: 8240772
    Abstract: A seatbelt holding structure that comprises a seat body 10 on which a seater is seated, a seatbelt 20 that restrains the seater seated on the seat body 10, and a belt cover 40 as a belt holding unit that holds the seatbelt 20 in a direction in which a seating space of the seat body 10 is open.
    Type: Grant
    Filed: May 22, 2008
    Date of Patent: August 14, 2012
    Assignee: COMBI Corporation
    Inventors: Takahiro Kawata, Shushi Hosoya
  • Patent number: 8193763
    Abstract: The present invention provides enhanced serial communication reliability in a situation where a plurality of cell controllers and a battery controller are daisy-chained to form a serial communication configuration. While the plurality of cell controllers and the battery controller are daisy-chained to form a serial communication configuration, the battery controller or each cell controller includes a communication speed detection means, which detects the communication speed of data input from an additional controller, and a reception timing correction means, which corrects the reception timing for data input from the additional controller in accordance with the communication speed detected by the communication speed detection means.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: June 5, 2012
    Assignee: Hitachi Vehicle Energy, Ltd.
    Inventors: Takahiro Kawata, Akihiko Emori, Youhei Kawahara, Akihiko Kudo
  • Publication number: 20120013403
    Abstract: An amplifier circuit is configured to be preceded by a single-ended-to-differential translate circuit using a BTL configuration operating at a low voltage and succeeded by amplifiers to amplify output signals VOT and VOB from the single-ended-to-differential translate circuit. The amplifier circuit activates a mute function of the subsequent amplifiers during state transition when the single-ended-to-differential translate circuit turns on. Consequently, the amplifier circuit fixes output signals OUTP and OUTN to 0 V and masks an output noise. The amplifier circuit inactivates the mute function after signals VOT and VOB become stable. Thereby, the amplifier circuit is capable of easily preventing a pop noise using a BTL configuration requested for high voltage output to drive a piezoelectric actuator.
    Type: Application
    Filed: July 14, 2011
    Publication date: January 19, 2012
    Inventors: Ryusuke SAHARA, Satoshi UENO, Takahiro KAWATA
  • Publication number: 20120013220
    Abstract: Disclosed is a piezoelectric actuator drive unit that includes a piezoelectric actuator drive amplifier and a piezoelectric actuator drive unit power supply. Combinations of high and low signal levels of a first control signal, which controls the supply voltage and amplifier bias voltage of the piezoelectric actuator drive amplifier, and a second control signal, which controls the driving force of the piezoelectric actuator drive amplifier, are associated with a haptic feedback function, a receiver function for generating an audio output, and a speaker function for generating music or the like. Thus, the piezoelectric actuator drive unit, which vibrates a piezoelectric actuator, is adapted to the haptic feedback function, the receiver function, and the speaker function, and can optimize its power and drive amplifier characteristics.
    Type: Application
    Filed: July 14, 2011
    Publication date: January 19, 2012
    Inventors: Takahiro KAWATA, Ryusuke Sahara, Satoshi Ueno
  • Publication number: 20110187326
    Abstract: The present invention provides enhanced serial communication reliability in a situation where a plurality of cell controllers and a battery controller are daisy-chained to form a serial communication configuration. While the plurality of cell controllers and the battery controller are daisy-chained to form a serial communication configuration, the battery controller or each cell controller includes a communication speed detection means, which detects the communication speed of data input from an additional controller, and a reception timing correction means, which corrects the reception, timing for data input from the additional controller in accordance with the communication speed detected by the communication speed detection means.
    Type: Application
    Filed: February 10, 2011
    Publication date: August 4, 2011
    Applicant: HITACHI VEHICLE ENERGY, LTD.
    Inventors: Takahiro KAWATA, Akihiko EMORI, Youhei KAWAHARA, Akihiko KUDO
  • Patent number: 7952327
    Abstract: The present invention provides an assembled battery total voltage detection and leak detection apparatus which is reduced in size and is reduced in manufacturing costs. Detection of a total voltage is performed at a measurement time of a total voltage of an assembled battery 1 by connecting an output of a positive electrode resistance voltage dividing circuit composed of resistors 9 and 10 to + input of a differential amplifier 20 and connecting an output of a negative electrode resistance voltage dividing circuit composed of resistors 12 and 11 to ? input of the amplifier 20, and it performs leak detection at a leak detection time by connecting an output of a positive electrode resistance voltage dividing circuit to + input of the amplifier 20 and connecting + input of the amplifier 20 to the minus input of the differential amplifier 20 to measure an output voltage of the amplifier 20.
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: May 31, 2011
    Assignee: Hitachi Vehicle Energy, Ltd.
    Inventors: Akihiko Kudo, Masaki Nagaoka, Akihiko Emori, Takahiro Kawata
  • Patent number: 7911178
    Abstract: The present invention provides enhanced serial communication reliability in a situation where a plurality of cell controllers and a battery controller are daisy-chained to form a serial communication configuration. While the plurality of cell controllers and the battery controller are daisy-chained to form a serial communication configuration, the battery controller or each cell controller includes a communication speed detection means, which detects the communication speed of data input from an additional controller, and a reception timing correction means, which corrects the reception timing for data input from the additional controller in accordance with the communication speed detected by the communication speed detection means.
    Type: Grant
    Filed: January 24, 2008
    Date of Patent: March 22, 2011
    Assignee: Hitachi Vehicle Energy, Ltd.
    Inventors: Takahiro Kawata, Akihiko Emori, Youhei Kawahara, Akihiko Kudo
  • Publication number: 20100213696
    Abstract: [Problem to be Solved] The present invention has been achieved to provide a seatbelt holding structure that can increase the openness of a seating space by holding the entire seatbelt, and that can prevent tampering of an attachment by an infant or loss of the attachment. [Means for Solving Problem] The seatbelt holding structure comprises a seat body 10 on which a seater is seated, a seatbelt 20 that restrains the seater seated on the seat body 10, and a belt cover 40 as a belt holding unit that holds the seatbelt 20 in a direction in which a seating space of the seat body 10 is open. According to the invention, the seating space S in front of the seat body 10 can be maintained open without interposition of the seatbelts 20, and it is possible to prevent the non-fastened seatbelts 20 from being obstacle against seating action.
    Type: Application
    Filed: May 22, 2008
    Publication date: August 26, 2010
    Applicant: Combi Corporation
    Inventors: Takahiro Kawata, Shushi Hosoya
  • Publication number: 20080219337
    Abstract: The present invention provides enhanced serial communication reliability in a situation where a plurality of cell controllers and a battery controller are daisy-chained to form a serial communication configuration. While the plurality of cell controllers and the battery controller are daisy-chained to form a serial communication configuration, the battery controller or each cell controller includes a communication speed detection means, which detects the communication speed of data input from an additional controller, and a reception timing correction means, which corrects the reception timing for data input from the additional controller in accordance with the communication speed detected by the communication speed detection means.
    Type: Application
    Filed: January 24, 2008
    Publication date: September 11, 2008
    Applicant: HITACHI VEHICLE ENERGY, LTD.
    Inventors: Takahiro Kawata, Akihiko Emori, Youhei Kawahara, Akihiko Kudo
  • Publication number: 20080076011
    Abstract: There is provided a highly reliable storage battery apparatus which can diagnose the status of a temperature detection unit and a cooling unit. In the storage battery apparatus comprising a battery module including one or more batteries, a plurality of temperature detection units and a cooling unit cooling the battery module, the temperature detection units measure, at least, the temperature of the cooling medium inputted to the storage battery apparatus, the temperature of the cooling medium outputted from the storage battery apparatus, and the temperature of at least one of the batteries and the battery module.
    Type: Application
    Filed: August 10, 2007
    Publication date: March 27, 2008
    Inventors: Akihiko Emori, Youhei Kawahara, Takahiro Kawata, Akihiko Kudo
  • Publication number: 20080054907
    Abstract: The present invention provides an assembled battery total voltage detection and leak detection apparatus which is reduced in size and is reduced in manufacturing costs. Detection of a total voltage is performed at a measurement time of a total voltage of an assembled battery 1 by connecting an output of a positive electrode resistance voltage dividing circuit composed of resistors 9 and 10 to + input of a differential amplifier 20 and connecting an output of a negative electrode resistance voltage dividing circuit composed of resistors 12 and 11 to ? input of the amplifier 20, and it performs leak detection at a leak detection time by connecting an output of a positive electrode resistance voltage dividing circuit to + input of the amplifier 20 and connecting + input of the amplifier 20 to the minus input of the differential amplifier 20 to measure an output voltage of the amplifier 20.
    Type: Application
    Filed: April 17, 2007
    Publication date: March 6, 2008
    Applicant: HITACHI VEHICLE ENERGY, LTD.
    Inventors: Akihiko Kudo, Masaki Nagaoka, Akihiko Emori, Takahiro Kawata
  • Publication number: 20080030198
    Abstract: A communication means (105) of a battery monitoring device (101) receives setting information (measuring parameters) about the type or structure of a storage battery (102) to be monitored from a host system (106). A setting means (107) acquires the measuring parameters and performs setting for a measuring means (103) and a digital signal conversion means (104). In other words, the setting means (107) sets, in accordance with the type or structure of the storage battery (102), the measuring parameters (namely, the measuring time interval, the measuring channel number, the measurement range and the like) for the measuring means (103) and the digital signal conversion means (104). Thus, even when the type and construction of the storage battery (102) changes, state of charge and the like of the storage battery (102) can be accurately measured and monitored by the battery monitoring device (101).
    Type: Application
    Filed: August 2, 2007
    Publication date: February 7, 2008
    Inventors: Takahiro KAWATA, Akihiko Emori, Youhei Kawahara, Hiroshi Arita
  • Patent number: 7009246
    Abstract: To reduce the width of isolation between the first and second p channel MIS•FETs driven by different voltages, a first p channel MIS•FET driven by a first supply voltage and a second p channel MIS•FET driven by a second supply voltage higher than the first supply voltage are arranged in the same n well of the same semiconductor substrate, and the second supply voltage is supplied as a common well bias voltage to the n well.
    Type: Grant
    Filed: February 6, 2004
    Date of Patent: March 7, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Takahiro Kawata, Shigeru Nakahara, Keiichi Higeta