Patents by Inventor Kazuyuki Ishida

Kazuyuki Ishida 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: 8208812
    Abstract: A control-target-value setting unit sets a control target value corresponding to the number of multiplexed wavelengths measured by a number-of-multiplexed-wavelengths measuring unit. A controller controls the variable optical attenuator based on the control target value. An optical amplifier performs an optical amplification with a constant gain regardless of power of a wavelength-multiplexed light. The controller performs feedback control of the variable optical attenuator such that a result of measurement of the total power of the wavelength-multiplexed light coincides with the control target value.
    Type: Grant
    Filed: May 25, 2006
    Date of Patent: June 26, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Toshiyuki Tokura, Katsuhiro Shimizu, Kazuyuki Ishida, Kuniaki Motoshima
  • Patent number: 8059971
    Abstract: An optical reception device realizes stabilization of reception sensitivity inexpensively and highly precisely. The optical reception device includes: a Mach-Zehnder type 1-bit delay unit including a one-terminal input port and two-terminal output ports for decoding an optical difference phase shift keying (DPSK) signal and provided with one or more phase control functions to control the phase state of light; photoelectric conversion means for branching a portion of an optical output signal output from the one-side output port of the Mach-Zehnder type 1-bit delay unit, to convert the branched portion into an electric signal; and a phase control unit for controlling the phase state of the Mach-Zehnder type 1-bit delay device by using as an error signal the output signal of the photoelectric conversion means.
    Type: Grant
    Filed: December 28, 2004
    Date of Patent: November 15, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shunsuke Mitani, Kazuyuki Ishida, Katsuhiro Shimizu
  • Publication number: 20110104511
    Abstract: By respectively abutting first and second outer diameter sections of a second metallic member against first and second inner diameter sections of a first metallic member, and energizing the first metallic member and the second metallic member using a pair of electrodes while pressurizing both metallic members in an axial direction thereof, a first junction where the first inner diameter section and the first outer diameter section are bonded and a second junction where the second inner diameter section and the second outer diameter section are bonded are formed between both metallic members, and a gap in which the metals do not come into contact with each other is formed between both junctions over a predetermined axial length. Accordingly, a high joint strength can be secured using less energy for bonding.
    Type: Application
    Filed: October 28, 2010
    Publication date: May 5, 2011
    Applicants: MAZDA MOTOR CORPORATION, ORIGIN ELECTRIC COMPANY, LIMTED
    Inventors: Shinya OKUMURA, Akira HASHIMOTO, Kazuyuki SHIINO, Takeshi FUJII, Akinobu YAMAGATA, Hiroaki HAYASHI, Tomoo SAWAZAKI, Kazuyuki ISHIDA, Masatoshi HAMANO, Hiroji SASAKI
  • Publication number: 20110032422
    Abstract: In a video processing system which divides HD-size image data into a plurality pieces of sub-image data and performs image processing for upconversion to 4K×2K image data, four image processors synchronous with an HD signal each process a corresponding one of the four pieces of sub-image data. In this case, the image processors process the four pieces of sub-image regions while causing the four pieces of sub-image regions to overlap at their division boundaries, and particularly process the overlapping regions during respective blanking periods. After the image processing of the image processors, the overlapping data is removed. Thereafter, the pieces of image data of the four sub-regions are combined. Therefore, the division boundaries of the pieces of sub-images can be processed without a degradation in image quality.
    Type: Application
    Filed: October 18, 2010
    Publication date: February 10, 2011
    Applicant: PANASONIC CORPORATION
    Inventors: Nariaki YAMAMOTO, Shun KINOSHITA, Hiroshi TANIUCHI, Kunihiro KAIDA, Kazuyuki ISHIDA
  • Publication number: 20100310835
    Abstract: Disclosed is a coating composition for a plastic label, which contains an oxetane compound, an epoxy compound, and a cyclic acetal and/or a poly(vinyl butyral). The coating composition excels in suitability for printing such as gravure printing or flexographic printing, cures rapidly to give excellent productivity, and after curing, gives a coating layer that excels in adhesion to a plastic base film and in toughness. A plastic label formed using the coating composition excels in surface scratch resistance and crumpling resistance, and therefore is particularly useful as a label for use in plastic containers, and metal containers such as bottle cans.
    Type: Application
    Filed: December 19, 2006
    Publication date: December 9, 2010
    Applicant: FUJI SEAL INTERNATIONAL, INC.
    Inventors: Kazuyuki Ishida, Akira Shintani, Akira Miyazaki, Suguru Arai
  • Patent number: 7809281
    Abstract: A differential encoder generates a differentially encoded signal based on a data signal. An RZ (return to zero) encoder generates an electric RZ differential signal as an RZ signal in an electric area based on the differentially encoded signal. A Mach-Zehnder interferometer type intensity modulator generates an optical RZ-DSPK (differential phase shift keying) signal as an RZ signal in an optical area based on the electric RZ differential signal.
    Type: Grant
    Filed: August 27, 2003
    Date of Patent: October 5, 2010
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kazuyuki Ishida, Kaoru Kinjo, Takashi Mizuochi
  • Publication number: 20100239263
    Abstract: A control-target-value setting unit sets a control target value corresponding to the number of multiplexed wavelengths measured by a number-of-multiplexed-wavelengths measuring unit. A controller controls the variable optical attenuator based on the control target value. An optical amplifier performs an optical amplification with a constant gain regardless of power of a wavelength-multiplexed light. The controller performs feedback control of the variable optical attenuator such that a result of measurement of the total power of the wavelength-multiplexed light coincides with the control target value.
    Type: Application
    Filed: May 25, 2006
    Publication date: September 23, 2010
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Toshiyuki Tokura, Katsuhiro Shimizu, Kazuyuki Ishida, Kuniaki Motoshima
  • Publication number: 20080175602
    Abstract: An optical reception device realizes stabilization of reception sensitivity inexpensively and highly precisely. The optical reception device includes: a Mach-Zehnder type 1-bit delay unit including a one-terminal input port and two-terminal output ports for decoding an optical difference phase shift keying (DPSK) signal and provided with one or more phase control functions to control the phase state of light; photoelectric conversion means for branching a portion of an optical output signal output from the one-side output port of the Mach-Zehnder type 1-bit delay unit, to convert the branched portion into an electric signal; and a phase control unit for controlling the phase state of the Mach-Zehnder type 1-bit delay device by using as an error signal the output signal of the photoelectric conversion means.
    Type: Application
    Filed: December 28, 2004
    Publication date: July 24, 2008
    Inventors: Shunsuke Mitani, Kazuyuki Ishida, Katsuhiro Shimizu
  • Publication number: 20060245763
    Abstract: A differential encoder generates a differentially encoded signal based on a data signal. An RZ (return to zero) encoder generates an electric RZ differential signal as an RZ signal in an electric area based on the differentially encoded signal. A Mach-Zehnder interferometer type intensity modulator generates an optical RZ-DSPK (differential phase shift keying) signal as an RZ signal in an optical area based on the electric RZ differential signal.
    Type: Application
    Filed: August 27, 2003
    Publication date: November 2, 2006
    Applicant: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kazuyuki Ishida, Kaoru Kinjo, Takashi Mizuochi
  • Patent number: 7092643
    Abstract: The optical transmission apparatus has a Mach-Zehnder optical modulator, a light source for applying an optical signal of a continuous light to the optical modulator, a driving circuit for inputting a driving signal into the optical modulator, a branching filter for taking out a part of an output optical signal, a photodiode for converting the taken-out output optical signal into an electric signal, a band pass filter for extracting a frequency component of a driving signal included in this electric signal, an error signal generator circuit for generating an error signal of a bias voltage that minimizes a value of the extracted frequency component, and a bias voltage control circuit for applying a bias voltage added with this error signal to the optical modulator.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: August 15, 2006
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Satoshi Kajiya, Kazuyuki Ishida, Katsuhiro Shimizu, Yukio Kobayashi
  • Patent number: 7058313
    Abstract: In the multi-value modulation apparatus, one optical intensity detecting unit detects optical intensity of a modulation optical signal generated by one optical modulation signal generating unit and output from the variable optical attenuator. The detected optical intensity is provided to the comparator. Another optical intensity detecting unit detects optical intensity of a modulation optical signal output from another optical modulation signal generating unit. The attenuator attenuates the optical intensity detected by the another optical intensity detecting unit, and provides it to the comparator. The output of the comparator is provided to the optical variable attenuator as a control signal. The variable optical attenuator controls optical intensity of the modulation optical signal based on the control signal.
    Type: Grant
    Filed: October 4, 2001
    Date of Patent: June 6, 2006
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Katsuhiro Shimizu, Kazuyuki Ishida, Yukio Kobayashi
  • Patent number: 6836622
    Abstract: The optical transmitter comprises a light source which inputs continuous optical signal and a driving circuit which inputs driving signal to an optical modulator of Mach-Zehnder type. A photo coupler separates a part of the output of the optical modulator. A photo diode converts this part into electric signal. A band-pass filter and a pre-amplifier extract a frequency component of the driving signal contained in the electric signal. A mixer conducts synchronous detection between the driving signal and the extracted frequency component. Finally, a bias voltage control circuit controls a bias voltage based on a result of the phase comparison.
    Type: Grant
    Filed: April 24, 2001
    Date of Patent: December 28, 2004
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Tatsuya Kobayashi, Kazuyuki Ishida, Katsuhiro Shimizu, Yukio Kobayashi
  • Patent number: 6832048
    Abstract: An AWG (arrayed-waveguide grating/10A) divides input ports (11A1 to 11An+1−1) into 1 number of groups, each group comprising m number of input ports, and combines optical signals belonging to each of the groups. For example, the optical signals of wavelengths &lgr;1 to &lgr;m are input from the input ports (11A1 to 11Am) and output from an output port (12A1) as multiplex light. The multiplex light output in each of the groups in the above manner is input into a wave combination coupler (18A) and output to a transmission line (19A) as multiplex light of the optical signals of the wavelengths &lgr;1 to &lgr;n.
    Type: Grant
    Filed: February 14, 2001
    Date of Patent: December 14, 2004
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kazuyuki Ishida, Katsuhiro Shimizu
  • Publication number: 20020167705
    Abstract: In the multi-value modulation apparatus, one optical intensity detecting unit detects optical intensity of a modulation optical signal generated by one optical modulation signal generating unit and output from the variable optical attenuator. The detected optical intensity is provided to the comparator. Another optical intensity detecting unit detects optical intensity of a modulation optical signal output from another optical modulation signal generating unit. The attenuator attenuates the optical intensity detected by the another optical intensity detecting unit, and provides it to the comparator. The output of the comparator is provided to the optical variable attenuator as a control signal. The variable optical attenuator controls optical intensity of the modulation optical signal based on the control signal.
    Type: Application
    Filed: October 4, 2001
    Publication date: November 14, 2002
    Inventors: Katsuhiro Shimizu, Kazuyuki Ishida, Yukio Kobayashi
  • Publication number: 20020003648
    Abstract: The optical transmitter comprises a light source which inputs continuous optical signal and a driving circuit which inputs driving signal to an optical modulator of Mach-Zehnder type. A photo coupler separates a part of the output of the optical modulator. A photo diode converts this part into electric signal. A band-pass filter and a pre-amplifier extract a frequency component of the driving signal contained in the electric signal. A mixer conducts synchronous detection between the driving signal and the extracted frequency component. Finally, a bias voltage control circuit controls a bias voltage based on a result of the phase comparison.
    Type: Application
    Filed: April 24, 2001
    Publication date: January 10, 2002
    Inventors: Tatsuya Kobayashi, Kazuyuki Ishida, Katsuhiro Shimizu, Yukio Kobayashi
  • Publication number: 20020001116
    Abstract: The optical transmission apparatus has a Mach-Zehnder optical modulator, a light source for applying an optical signal of a continuous light to the optical modulator, a driving circuit for inputting a driving signal into the optical modulator, a branching filter for taking out a part of an output optical signal, a photodiode for converting the taken-out output optical signal into an electric signal, a band pass filter for extracting a frequency component of a driving signal included in this electric signal, an error signal generator circuit for generating an error signal of a bias voltage that minimizes a value of the extracted frequency component, and a bias voltage control circuit for applying a bias voltage added with this error signal to the optical modulator.
    Type: Application
    Filed: June 28, 2001
    Publication date: January 3, 2002
    Inventors: Satoshi Kajiya, Kazuyuki Ishida, Katsuhiro Shimizu, Yukio Kobayashi
  • Publication number: 20020001115
    Abstract: The optical transmission apparatus has an optical modulator of Mach-Zehnder type, a light source which supplies an optical signal to the optical modulator, a branching filter for taking out a part of an output optical signal, an optical spectrum monitor for monitoring an optical spectrum of an output optical signal taken out, an error signal generator circuit for generating an error signal that shows a bias voltage error based on a result of this monitoring, and a bias voltage control circuit for applying a bias voltage added with this error signal to the optical modulator.
    Type: Application
    Filed: May 17, 2001
    Publication date: January 3, 2002
    Inventors: Kazuyuki Ishida, Katsuhiro Shimizu, Yukio Kobayashi
  • Publication number: 20010013966
    Abstract: An AWG (arrayed-waveguide grating/10A) divides input ports (11A1 to 11An+1−1) into 1 number of groups, each group comprising m number of input ports, and combines optical signals belonging to each of the groups. For example, the optical signals of wavelengths &lgr;1 to &lgr;m are input from the input ports (11A1 to 11Am) and output from an output port (12A1) as multiplex light. The multiplex light output in each of the groups in the above manner is input into a wave combination coupler (18A) and output to a transmission line (19A) as multiplex light of the optical signals of the wavelengths &lgr;1 to &lgr;n.
    Type: Application
    Filed: February 14, 2001
    Publication date: August 16, 2001
    Inventors: Kazuyuki Ishida, Katsuhiro Shimizu
  • Patent number: 5003977
    Abstract: A device for analyzing fluorescent light signals consists of memory means for storing as a reference spectrum a spectrum obtained under predetermined conditions, and extraction means for extracting a predetermined component spectrum based on the results of a conversion of the reference spectrum using a specific wavelength of a measured spectrum obtained during actual measurement and a specific wavelength of the reference spectrum. The arrangement of the invention allows the spectrum of a specific component to be extracted accurately from measured spectra.
    Type: Grant
    Filed: March 9, 1989
    Date of Patent: April 2, 1991
    Assignees: Agency of Industrial Science and Technology, Ministry of International Trade and Industry
    Inventors: Susumu Suzuki, Kazuyuki Ishida, Takeo Ozaki