Patents by Inventor Mikio Fujiwara

Mikio Fujiwara 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: 7067790
    Abstract: The present invention provides a photodetector for weak light that can release charge from the circuit without increasing capacity; the present invention being characterized by a photodetector for weak light that has a charge release means which permits the photodetector for weak light of the present invention to avoid increasing its capacity because it does not require a reset transistor integrated with the photodector, rather the charge reset means of the present invention lowers mounting capacity by removing itself from the circuit after it releases the charge.
    Type: Grant
    Filed: July 6, 2004
    Date of Patent: June 27, 2006
    Assignee: National Institute of Information and Communications Technology Incorporated Administrative Agency
    Inventors: Mikio Fujiwara, Masahide Sasaki, Makoto Akiba
  • Patent number: 6947828
    Abstract: A knock control system for an internal combustion engine having a plurality of cylinders. Operation of the engine is switchable between a partial-cylinder operation for operating some of the cylinders and an all-cylinder operation for operating all of the cylinders. A determination threshold for determining knocking is set according to an output signal from the knock sensor. A level of the output signal from the knock sensor is compared with the determination threshold, and occurrence of knocking is determined according to a result of the comparison. The determination threshold used during the partial-cylinder operation is set to a value less than a value of the determination threshold used during the all-cylinder operation.
    Type: Grant
    Filed: February 2, 2004
    Date of Patent: September 20, 2005
    Assignee: Honda Motor Co., Ltd.
    Inventors: Mikio Fujiwara, Yasuaki Asaki, Jiro Takagi, Hirosuke Niwa
  • Publication number: 20050105468
    Abstract: The video signal processor of the present invention comprises a CCD for storing an inputted image by converting it into an electric charge through photoelectrical conversion to be stored by each field and then outputting the stored electric charge by each field; a shutter pulse generator for supplying a shutter pulse which adjusts storage time of the electric charge in the CCD; and a variable controller for variably controlling adjusting amount of electric charge storage time by the shutter pulse by a field unit.
    Type: Application
    Filed: November 15, 2004
    Publication date: May 19, 2005
    Inventors: Takahiro Mitsui, Mikio Fujiwara, Katsuji Uro
  • Publication number: 20050035274
    Abstract: This invention provides a photodetector for weak light and a weak light detection system including the photodetector for weak light the photodetector for weak light is comprised of a substrate on which an integrating read circuit including a PIN photodiode or an APD and an FET is mounted, wherein the entire assembly is mounted while separating the substrate from a ground potential without grounding the substrate, such a photodetector for weak light can reduce noise and ensure a high enough sensitivity enough to be able to discriminate the number of photons.
    Type: Application
    Filed: July 6, 2004
    Publication date: February 17, 2005
    Inventors: Mikio Fujiwara, Masahide Sasaki, Makoto Akiba
  • Patent number: 6854449
    Abstract: A control apparatus for an internal combustion engine having a plurality of cylinders and a cylinder halting mechanism. The cylinder halting mechanism switches between an all-cylinder operation in which all of the plurality of cylinders are operated and a partial-cylinder operation in which at least one of the plurality of cylinders is halted. Operating parameters of the engine and the atmospheric pressure are detected. The cylinder halting mechanism is controlled to perform the all-cylinder operation or the partial-cylinder operation according to the operating parameters of the engine and the detected atmospheric pressure.
    Type: Grant
    Filed: April 15, 2004
    Date of Patent: February 15, 2005
    Assignee: Honda Motor Co., Ltd.
    Inventors: Junya Iino, Yasuaki Asaki, Mikio Fujiwara, Jiro Takagi, Katsumi Noguchi
  • Publication number: 20050029434
    Abstract: This invention provides a method for manufacturing a circuit for photon number counting without destroying a FET within the circuit by manufacturing a photodetector for weak light, the photodetector for weak light comprising a circuit on a substrate, the circuit comprising light detection means and a field effect transistor (FET), the method comprising: a light detection means connection step; an FET electrode-to-substrate electrode connection step; an external electrode connection step, a light detection means-to-gate connection step.
    Type: Application
    Filed: July 6, 2004
    Publication date: February 10, 2005
    Inventors: Mikio Fujiwara, Masahide Sasaki, Makoto Akiba
  • Publication number: 20050023542
    Abstract: The present invention provides a photodetector for weak light that can release charge from the circuit without increasing capacity; the present invention being characterized by a photodetector for weak light that has a charge release means which permits the photodetector for weak light of the present invention to avoid increasing its capacity because it does not require a reset transistor integrated with the photodector, rather the charge reset means of the present invention lowers mounting capacity by removing itself from the circuit after it releases the charge.
    Type: Application
    Filed: July 6, 2004
    Publication date: February 3, 2005
    Inventors: Mikio Fujiwara, Masahide Sasaki, Makoto Akiba
  • Publication number: 20050023467
    Abstract: The present invention provides a photodetector for weak light that can prevent noise from impurities, prevent electrodes from disconnecting from the substrate, and can be easily cooled; the present invention further provides a photodetector for weak light that can count the number of photons; the present invention solves the above problems by using an ultraviolet light transparent substrate on the photodetector for weak light.
    Type: Application
    Filed: July 6, 2004
    Publication date: February 3, 2005
    Inventors: Mikio Fujiwara, Masahide Sasaki, Makoto Akiba
  • Patent number: 6827062
    Abstract: An ignition timing control apparatus for an internal combustion engine having a plurality of cylinders, wherein operation of the engine is switchable between a partial-cylinder operation, which operates some of the cylinders, and an all-cylinder operation, which operates all of the cylinders. Basic ignition timing is calculated according to an operating condition of the engine. Knocking is determined based on an output of the knock sensor. A correction amount of the ignition timing is calculated according to a result of the knocking determination to suppress knocking, and the basic ignition timing is corrected with the calculated correction amount. Learning values of the correction amount are calculated corresponding, respectively, to partial-cylinder operation and all-cylinder operation, and one of the calculated learning values is used according to the operating condition of the engine.
    Type: Grant
    Filed: February 12, 2004
    Date of Patent: December 7, 2004
    Assignee: Honda Motor Co., Ltd.
    Inventors: Takaaki Fukusako, Mikio Fujiwara, Jiro Takagi
  • Publication number: 20040209735
    Abstract: A control apparatus for an internal combustion engine having a plurality of cylinders and a cylinder halting mechanism. The cylinder halting mechanism switches between an all-cylinder operation in which all of the plurality of cylinders are operated and a partial-cylinder operation in which at least one of the plurality of cylinders is halted. Operating parameters of the engine and the atmospheric pressure are detected. The cylinder halting mechanism is controlled to perform the all-cylinder operation or the partial-cylinder operation according to the operating parameters of the engine and the detected atmospheric pressure.
    Type: Application
    Filed: April 15, 2004
    Publication date: October 21, 2004
    Applicant: Honda Motor Co., Ltd.
    Inventors: Junya Iino, Yasuaki Asaki, Mikio Fujiwara, Jiro Takagi, Katsumi Noguchi
  • Publication number: 20040163623
    Abstract: An ignition timing control apparatus for an internal combustion engine having a plurality of cylinders, wherein operation of the engine is switchable between a partial-cylinder operation, which operates some of the cylinders, and an all-cylinder operation, which operates all of the cylinders. Basic ignition timing is calculated according to an operating condition of the engine. Knocking is determined based on an output of the knock sensor. A correction amount of the ignition timing is calculated according to a result of the knocking determination to suppress knocking, and the basic ignition timing is corrected with the calculated correction amount. Learning values of the correction amount are calculated corresponding, respectively, to partial-cylinder operation and all-cylinder operation, and one of the calculated learning values is used according to the operating condition of the engine.
    Type: Application
    Filed: February 12, 2004
    Publication date: August 26, 2004
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Takaaki Fukusako, Mikio Fujiwara, Jiro Takagi
  • Publication number: 20040158388
    Abstract: A knock control system for an internal combustion engine having a plurality of cylinders. Operation of the engine is switchable between a partial-cylinder operation for operating some of the cylinders and an all-cylinder operation for operating all of the cylinders. A determination threshold for determining knocking is set according to an output signal from the knock sensor. A level of the output signal from the knock sensor is compared with the determination threshold, and occurrence of knocking is determined according to a result of the comparison. The determination threshold used during the partial-cylinder operation is set to a value less than a value of the determination threshold used during the all-cylinder operation.
    Type: Application
    Filed: February 2, 2004
    Publication date: August 12, 2004
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Mikio Fujiwara, Yasuaki Asaki, Jiro Takagi, Hirosuke Niwa
  • Patent number: 6773936
    Abstract: The present invention relates to a method for reducing low-frequency noise in a cooled circuit wherein low-frequency noise in a cryogenic semiconductor device is reduced by carrying out thermal cure. The semiconductor device is turned on at a first temperature, and the temperature of the semiconductor device is temporarily raised, while flowing current in the semiconductor device, to a second temperature that is higher than the first temperature, and then cooling the temperature of the semiconductor device from the second temperature to a cryogenic temperature, at which the semiconductor device can operate.
    Type: Grant
    Filed: September 6, 2002
    Date of Patent: August 10, 2004
    Assignee: Communications Research Laboratory, Independent Administrative Institution
    Inventors: Mikio Fujiwara, Makoto Akiba
  • Patent number: 6691021
    Abstract: There is provided a failure determination system for a variable-cylinder internal combustion engine which is capable of promptly and accurately carrying out failure determination of the valve-actuating system for cylinders for being made idle during a partial-cylinder operation mode. The failure determination system is capable of switching a cylinder operation mode between an all-cylinder operation mode in which all the cylinders are operated, and a partial-cylinder operation mode in which part of the cylinders are made idle. The failure determination system includes an ECU which executes a failure-determining operation mode for causing a valve-actuating mechanism to resume actuation of intake valves and exhaust valves of the part of the cylinders in a state in which fuel supply to the part of the cylinders is stopped, when the cylinder operation mode is shifted from the partial-cylinder operation mode to the all-cylinder operation mode.
    Type: Grant
    Filed: January 17, 2002
    Date of Patent: February 10, 2004
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Jiro Takagi, Yasuaki Asaki, Mikio Fujiwara
  • Patent number: 6636881
    Abstract: In order to provide an inexpensive binary data counting device of which the processing is done at high speed and which can be implemented with a small circuit scale, a shifter array 10 is provided for outputting binary data of N bits, which comprises N×(N+1)/2 shifters of which the control inputs are the data expressed in a binary manner comprising N bits so that binary data wherein is are filled in from the right in the same number as 1s in the data expressed in a binary manner comprising N bits are outputted by controlling the operation of each shifter in the shifter array 10 with each bit value of the data expressed in a binary manner comprising N bits. An encoder is also provided for converting said binary data into a multi-valued number in accordance with the position of 1 in said binary data on the MSB side.
    Type: Grant
    Filed: August 8, 2000
    Date of Patent: October 21, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Mikio Fujiwara
  • Publication number: 20030087508
    Abstract: The present invention relates to a method for reducing low-frequency noise in a cooled circuit wherein low-frequency noise in a cryogenic semiconductor device is reduced by carrying out thermal cure. The semiconductor device is turned on at a first temperature, and the temperature of the semiconductor device is temporarily raised, while flowing current in the semiconductor device, to a second temperature that is higher than the first temperature, and then cooling the temperature of the semiconductor device from the second temperature to a cryogenic temperature, at which the semiconductor device can operate.
    Type: Application
    Filed: September 6, 2002
    Publication date: May 8, 2003
    Applicant: Communications Research Laboratory, Independent Administrative Institution
    Inventors: Mikio Fujiwara, Makoto Akiba
  • Patent number: 6499470
    Abstract: A control system for an internal combustion engine having a plurality of cylinders and a cylinder halting mechanism for halting operation of at least one of the plurality of cylinders. The cylinder halting mechanism is controlled to operate all of the plurality of cylinders or to halt the operation of the at least one of the plurality of cylinders. The operating state of the cylinder halting mechanism is detected based on the amount of change in the detected intake pressure of the engine.
    Type: Grant
    Filed: September 19, 2001
    Date of Patent: December 31, 2002
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Jiro Takagi, Yasuaki Asaki, Mikio Fujiwara
  • Publication number: 20020099495
    Abstract: There is provided a failure determination system for a variable-cylinder internal combustion engine which is capable of promptly and accurately carrying out failure determination of the valve-actuating system for cylinders for being made idle during a partial-cylinder operation mode. The failure determination system is capable of switching a cylinder operation mode between an all-cylinder operation mode in which all the cylinders are operated, and a partial-cylinder operation mode in which part of the cylinders are made idle. The failure determination system includes an ECU which executes a failure-determining operation mode for causing a valve-actuating mechanism to resume actuation of intake valves and exhaust valves of the part of the cylinders in a state in which fuel supply to the part of the cylinders is stopped, when the cylinder operation mode is shifted from the partial-cylinder operation mode to the all-cylinder operation mode.
    Type: Application
    Filed: January 17, 2002
    Publication date: July 25, 2002
    Applicant: HONDA GIKEN KOGYO KABUSHIKI KAISHA
    Inventors: Jiro Takagi, Yasuaki Asaki, Mikio Fujiwara
  • Publication number: 20020035986
    Abstract: A control system for an internal combustion engine having a plurality of cylinders and a cylinder halting mechanism for halting operation of at least one of the plurality of cylinders. The cylinder halting mechanism is controlled to operate all of the plurality of cylinders or to halt the operation of the at least one of the plurality of cylinders. The operating state of the cylinder halting mechanism is detected based on the amount of change in the detected intake pressure of the engine.
    Type: Application
    Filed: September 19, 2001
    Publication date: March 28, 2002
    Applicant: HONDA GIKEN KOGYO KABUSHIKI KAISHA
    Inventors: Jiro Takagi, Yasuaki Asaki, Mikio Fujiwara
  • Patent number: 6181494
    Abstract: In order to enhance adjustment efficiencies by automatic adjustment and gain excellent interchangeability overcoming the changes in characteristics due to variations in characteristics and wear of magnetic heads and the variations in characteristics of record media in high density recording/playback equipment, the present invention discloses a recording format provided with two recording areas of sinusoidal waves of a reference wavelength for making an adjustment of a playback amplifier and a short wavelength for making an adjustment of a playback equalizer, a recording area of adjustment data for detecting errors and making an accurate adjustment of the playback equalizer and a non-data area for recording system adjustment, and further provided on part of the foregoing areas with an indication that the medium is for automatic adjustment and at the same time with identification data to indicate kinds of the medium and, if necessary, to indicate kinds of the foregoing areas and also provided with time code, if
    Type: Grant
    Filed: December 8, 1998
    Date of Patent: January 30, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Mikio Fujiwara