Patents by Inventor Tomoaki Hirai

Tomoaki Hirai 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: 7962311
    Abstract: The present invention relates to a method for discriminating the morphology of a passenger seating in an automotive seat, comprising the steps of i) providing a set of a plurality of capacitive sensors (100) covering substantially a transversal cross section of a seat, ii) collecting the outputs of said plurality of capacitive sensors (100) provided on the seat, iii) determining the morphology of a target (10) facing the seat on the basis of measured distance separating the target (10) from the sensors (100) and measured surface of the sensors (100) covered by the target (10), from said outputs, and iv) comparing the determined morphology with at least a reference so as to classify the determined morphology between a plurality of reference ones.
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: June 14, 2011
    Assignee: Hitachi Computer Products (Europe) S.A.S.
    Inventors: Claude Launay, Tomoaki Hirai, Joaquim Da Silva, Florent Voisin, Takanori Ninomiya, Shunji Maeda
  • Patent number: 7895014
    Abstract: The present invention relates to a method to locate a target in regard of a sensor, comprising the steps of collecting the outputs of a capacitive sensor comprising a plurality of electrodes and combining said outputs so as to obtain a signal representative of the distance separating said target from the sensor.
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: February 22, 2011
    Assignee: Hitachi Computer Products (Europe) S.A.S.
    Inventors: Claude Launay, Joaquim Da Silva, Florent Voisin, Tomoaki Hirai, Takanori Ninomiya, Shunji Maeda
  • Publication number: 20100113132
    Abstract: A game machine having a control unit as a first game chance control device generating a game chance achieving at least one winning combination in winning combinations whose achievement probability varies in a game within a predetermined range provided to the player in exchange for medals, a dividend value control device setting a correspondence relationship between the winning combinations and the dividend values for the player, a dividend display control device displaying an odds display section where the winning combinations are related with the dividend values on a monitor according to the correspondence relationship set by the dividend value control device, a dividend creating device generating the dividend for the player corresponding to the achieved winning combination according to the correspondence relationship set by the dividend value control device when any winning combination is achieved, and a condition determining device determining whether a predetermined dividend change condition is establishe
    Type: Application
    Filed: February 29, 2008
    Publication date: May 6, 2010
    Applicant: KONAMI DIGITAL ENTERTAINMENT CO. LTD.
    Inventors: Yosuke Sasaki, Shinichi Ishii, Makoto Ando, Yaku Hiranabe, Tomoaki Hirai, Emiko Miyaji
  • Publication number: 20090088929
    Abstract: The present invention relates to a method determining the morphology of the occupant of an automotive car, characterized in that it comprises the steps of collecting (200) the outputs of a plurality of capacitive sensors (100) provided on a seat, determining for each capacitive sensors (100) a first value representative of the distance (di) separating a target (10) from the sensor (100) and a second value (Sdi) representative of the surface of the sensor (100) covered by the target (10), applying (210) to the second values (Sdi) representative of the surface of the sensor (100) covered by the target (10) a respective weighting (Wi) based on the corresponding first value (di) representative of the distance separating the target (10) from the same sensor (100), and determining (240) the morphology of the target (10) on the basis of the collection of weighted second values (SdixWi).
    Type: Application
    Filed: May 15, 2007
    Publication date: April 2, 2009
    Inventors: Claude Launay, Joaquim Da Silva, Florent Voisin, Tomoaki Hirai, Takanori Ninomiya, Shunji Maeda
  • Publication number: 20080033691
    Abstract: The present invention relates to a method to locate a target in regard of a sensor, comprising the steps of collecting the outputs of a capacitive sensor comprising a plurality of electrodes and combining said outputs so as to obtain a signal representative of the distance separating said target from the sensor.
    Type: Application
    Filed: May 15, 2007
    Publication date: February 7, 2008
    Inventors: Claude Launay, Joaquim Da Silva, Florent Voisin, Tomoaki Hirai, Takanori Ninomiya, Shunji Maeda
  • Publication number: 20080021650
    Abstract: The present invention relates to a method for discriminating the morphology of a passenger seating in an automotive seat, comprising the steps of i) providing a set of a plurality of capacitive sensors (100) covering substantially a transversal cross section of a seat, ii) collecting the outputs of said plurality of capacitive sensors (100) provided on the seat, iii) determining the morphology of a target (10) facing the seat on the basis of measured distance separating the target (10) from the sensors (100) and measured surface of the sensors (100) covered by the target (10), from said outputs, and iv) comparing the determined morphology with at least a reference so as to classify the determined morphology between a plurality of reference ones.
    Type: Application
    Filed: June 21, 2007
    Publication date: January 24, 2008
    Inventors: Claude Launay, Tomoaki Hirai, Joaquim Da Silva, Florent Voisin, Takanori Ninomiya, Shunji Maeda
  • Patent number: 7088665
    Abstract: An error detector circuit compares a value corresponding to a laser power supplied from a monitor diode of an optical pickup with a value representative of a target laser power, and outputs an error from the target value to a change-over switch. The change-over switch selects one of low-pass filters used for CAV recording and CLV recording. The low-pass filter used for CAV recording has a larger time constant than that of the low-pass filter used for CLV recording. The servo gain of a servo loop during the CAV recording is therefore set smaller than that of a servo loop during the CLV recording. A change in the laser power becomes gentle.
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: August 8, 2006
    Assignee: Yamaha Corporation
    Inventors: Atsushi Ogawa, Tomoaki Hirai
  • Patent number: 6990050
    Abstract: An optical disk recording and reproducing apparatus operates in a read mode for controlling a laser driver to maintain a laser power at a target read level so as to read a signal from an optical disk, and operates in a write mode for controlling the laser driver to alternate the laser power between a target write level and a target bottom level comparative with the target read level so as to write a signal into the optical disk. In the write mode, a value obtained by sampling and holding the bottom level is set as the target value of a bottom level, and a bottom level control signal is outputted according to a difference between this target value and the detected value of the bottom level. Thus, the laser power control can be performed without any errors being generated even if an offset has occurred in the detected bottom power. Thus, the bottom laser power can be maintained constant.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: January 24, 2006
    Assignee: Yamaha Corporation
    Inventors: Yoshihiko Shiozaki, Tomoaki Hirai
  • Patent number: 6920099
    Abstract: An optical disk recording apparatus operates in a write mode for controlling a laser driver to alternate a laser power between a target write level and a target bottom level so as to write a signal at a constant density into an optical disk which is rotated at a constant angular velocity. A controller operates in the write mode for outputting a bottom level control signal according to a difference between an actual bottom level and the target bottom level.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: July 19, 2005
    Assignee: Yamaha Corporation
    Inventors: Yoshihiko Shiozaki, Tomoaki Hirai
  • Patent number: 6661594
    Abstract: A signal processing circuit for a magnetic recording/reproducing apparatus, including at least an AGC, a PLL, a LPF, an equalizer circuit and a detection circuit, wherein a coefficient compensation circuit is formed by defining a constitution of the equalizer circuit, an error detection circuit is provided which operates by receiving input from the detection circuit, and the LSI is formed by a plurality of analog and digital chips, and the analog and digital chips are connected by current-output type D/A converters connected to at least the AGC and the PLL.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: December 9, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Naoki Satoh, Seiichi Mita, Shoichi Miyazawa, Terumi Takashi, Yosuke Hori, Yoshiju Watanabe, Akihiko Hirano, Satoshi Minoshima, Hideki Miyasaka, Toshihiro Nitta, Tomoaki Hirai, Ryushi Shimokawa, Koji Shida, Yasuhide Ouchi
  • Publication number: 20030035236
    Abstract: A signal processing circuit for a magnetic recording/reproducing apparatus, including at least an AGC, a PLL, a LPF, an equalizer circuit and a detection circuit, wherein a coefficient compensation circuit is formed by defining a constitution of the equalizer circuit, an error detection circuit is provided which operates by receiving input from the detection circuit, and the LSI is formed by a plurality of analog and digital chips, and the analog and digital chips are connected by current-output type D/A converters connected to at least the AGC and the PLL.
    Type: Application
    Filed: October 23, 2002
    Publication date: February 20, 2003
    Applicant: Hitachi, Ltd.
    Inventors: Naoki Satoh, Seiichi Mita, Shoichi Miyazawa, Terumi Takashi, Yosuke Hori, Yoshiju Watanabe, Akihiko Hirano, Satoshi Minoshima, Hideki Miyasaka, Toshihiro Nitta, Tomoaki Hirai, Ryushi Shimokawa, Koji Shida, Yasuhide Ouchi
  • Publication number: 20020100861
    Abstract: An error detector circuit compares a value corresponding to a laser power supplied from a monitor diode of an optical pickup with a value representative of a target laser power, and outputs an error from the target value to a change-over switch. The change-over switch selects one of low-pass filters used for CAV recording and CLV recording. The low-pass filer used for CAV recording has a larger time constant than that of the low-pass filter used for CLV recording. The servo gain of a servo loop during the CAV recording is therefore set smaller than that of a servo loop during the CLV recording. A change in the laser power becomes gentle.
    Type: Application
    Filed: January 30, 2002
    Publication date: August 1, 2002
    Inventors: Atsushi Ogawa, Tomoaki Hirai
  • Publication number: 20020041552
    Abstract: An optical disk recording and reproducing apparatus operates in a read mode for controlling a laser driver to maintain a laser power at a target read level so as to read a signal from an optical disk, and operates in a write mode for controlling the laser driver to alternate the laser power between a target write level and a target bottom level comparative with the target read level so as to write a signal into the optical disk. In the write mode, a value obtained by sampling and holding the bottom level is set as the target value of a bottom level, and a bottom level control signal is outputted according to a difference between this target value and the detected value of the bottom level. Thus, the laser power control can be performed without any errors being generated even if an offset has occurred in the detected bottom power. Thus, the bottom laser power can be maintained constant.
    Type: Application
    Filed: September 26, 2001
    Publication date: April 11, 2002
    Inventors: Yoshihiko Shiozaki, Tomoaki Hirai
  • Publication number: 20020039339
    Abstract: An optical disk recording apparatus operates in a write mode for controlling a laser driver to alternate a laser power between a target write level and a target bottom level so as to write a signal at a constant density into an optical disk which is rotated at a constant angular velocity. A controller operates in the write mode for outputting a bottom level control signal according to a difference between an actual bottom level and the target bottom level.
    Type: Application
    Filed: September 27, 2001
    Publication date: April 4, 2002
    Inventors: Yoshihiko Shiozaki, Tomoaki Hirai
  • Publication number: 20010009483
    Abstract: A signal processing circuit for a magnetic recording/reproducing apparatus, including at least an AGC, a PLL, a LPF, an equalizer circuit and a detection circuit, wherein a coefficient compensation circuit is formed by defining a constitution of the equalizer circuit, an error detection circuit is provided which operates by receiving input from the detection circuit, and the LSI is formed by a plurality of analog and digital chips, and the analog and digital chips are connected by current-output type D/A converters connected to at least the AGC and the PLL.
    Type: Application
    Filed: February 20, 2001
    Publication date: July 26, 2001
    Inventors: Naoki Satoh, Seiichi Mita, Shoichi Miyazawa, Terumi Takashi, Yosuke Hori, Yoshiju Watanabe, Akihiko Hirano, Satoshi Minoshima, Hideki Miyasaka, Toshihiro Nitta, Tomoaki Hirai, Ryushi Shimokawa, Koji Shida, Yasuhide Ouchi
  • Patent number: 5818655
    Abstract: A signal processing circuit for a magnetic recording/reproducing apparatus, including at least an AGC, a PLL, a LPF, an equalizer circuit and a detection circuit, wherein a coefficient compensation circuit is formed by defining a constitution of the equalizer circuit, an error detection circuit is provided which operates by receiving input from the detection circuit, and the LSI is formed by a plurality of analog and digital chips, and the analog and digital chips are connected by current-output type D/A converters connected to at least the AGC and the PLL.
    Type: Grant
    Filed: July 25, 1995
    Date of Patent: October 6, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Naoki Satoh, Seiichi Mita, Shoichi Miyazawa, Terumi Takashi, Yosuke Hori, Yoshiju Watanabe, Akihiko Hirano, Satoshi Minoshima, Hideki Miyasaka, Toshihiro Nitta, Tomoaki Hirai, Ryushi Shimokawa, Koji Shida, Yasuhide Ouchi
  • Patent number: 5434717
    Abstract: A timing adjusting circuit is provided to define the operating order of a differential amplifier circuit for amplifying read-out signals and an output circuit in order to minimize changes in output DC level. A damping resistor is disposed between two magnetic head terminals and a clamp circuit in a magnetic head driving circuit. To attend to a composite head configuration, short-circuiting with a power supply and a current flowing into the magnetic head during a non-write operation are detected as abnormalities. In addition, short-circuiting and open-circuiting of the magnetic head are also detected as abnormalities. Also, a read circuit is added to a write magnetic head, in order to output read-out signals in a read mode, so that the read-out signals are utilized for detecting errors in read-out signals from an exclusively designed read head or for detecting and correcting such errors.
    Type: Grant
    Filed: March 18, 1994
    Date of Patent: July 18, 1995
    Assignee: Hitachi, Ltd.
    Inventors: Masaki Yoshinaga, Yuji Nagaya, Tsuyoshi Hirose, Noriaki Hatanaka, Tomoaki Hirai, Tatsuo Mochizuki
  • Patent number: 5392172
    Abstract: A magnetic head circuit for a plurality of magnetic heads includes two emitter follower transistors for receiving magnetic head writing data, two differential transistors connected to the two emitter follower transistors for performing differential operation control thereover, and two resistors connected to collectors of the two differential transistors for supplying a base current to the two emitter follower transistors, and wherein the emitter follower transistors are connected in series with each other to perform differential switch operations over a magnetic head writing current. A magnetic head fly-back voltage has a clamp voltage which varies according to a writing current flowing through a pair of signal terminals. A pair of differential transistors, whose bases are connected to the pair of signal terminals and whose emitters are connected directly to each other, are operated according to a voltage appearing between the pair of signal terminals.
    Type: Grant
    Filed: January 28, 1993
    Date of Patent: February 21, 1995
    Assignee: Hitachi, Ltd.
    Inventors: Masaki Yoshinaga, Noriaki Hatanaka, Tomoaki Hirai, Yuji Nagaya, Tsuyoshi Hirose, Tadao Kaji