Patents by Inventor Isao Nakazawa

Isao Nakazawa 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: 8929469
    Abstract: The signal processing-system using singularity is provided which is excellent in determination of the original signal against the degradation environment of an operating condition and robust to the signal degradation of noise, can generate the signal suitable to regeneration of the original signal, and has regeneration means to regenerate the original signal, wherein the system comprises: an original signal converter of the signal processing-system which converts the original signal contained in the inputted signal into the signal containing singular points by using the specific function, the converter outputting the signal containing singular points; an original signal regenerator which converts the incoming signals containing singular points into signals having singular points by the specific signal processing, the regenerator extracting the undesired-signal component from the signals having singular points; and a regenerator which regenerates the original signal by carrying out the operation of the generat
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: January 6, 2015
    Assignee: Communication and Broadcasting International Laboratory Co., Ltd.
    Inventor: Isao Nakazawa
  • Patent number: 8351777
    Abstract: An image pickup apparatus includes a focus detector that utilizes a phase detection method, an image pickup device, an optical path switch configured to switch a path of light from an object between a first optical path used to lead the light to the focus detector and a second optical path used to lead the light to the image pickup device, a face detector configured to detect a face of the object from the image data, and a controller configured to provide such a control that the optical path switch can set the second optical path after the optical path switch sets the first optical path and the focus detector detects the on-focus state using the phase difference method, and allows the face detector to detect the face of the object after the optical path switch can set the second optical path.
    Type: Grant
    Filed: September 3, 2010
    Date of Patent: January 8, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Isao Nakazawa
  • Publication number: 20110069945
    Abstract: An image pickup apparatus includes a focus detector that utilizes a phase detection method, an image pickup device, an optical path switch configured to switch a path of light from an object between a first optical path used to lead the light to the focus detector and a second optical path used to lead the light to the image pickup device, a face detector configured to detect a face of the object from the image data, and a controller configured to provide such a control that the optical path switch can set the second optical path after the optical path switch sets the first optical path and the focus detector detects the on-focus state using the phase difference method, and allows the face detector to detect the face of the object after the optical path switch can set the second optical path.
    Type: Application
    Filed: September 3, 2010
    Publication date: March 24, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Isao Nakazawa
  • Publication number: 20110057689
    Abstract: This invention provides the signal processing-system using singularity which is excellent in determination of the original signal against the degradation environment of an operating condition and robust to the signal degradation of noise, can generate the signal suitable to regeneration of the original signal, and has regeneration means to regenerate the original signal. This is the signal processing-system using singularity and has following configuration and features. The original signal converter 10 of the signal processing-system converts the original signal contained in the inputted signal 11 into the signal containing singular points by using the specific function that can convert the signal into signal containing singular points by the signal processing with the specific function. Then it outputs the signal containing singular points 19. The original signal regenerator 20 converts the incoming signals containing singular points 21 into signals having singular points by the specific signal processing.
    Type: Application
    Filed: February 27, 2009
    Publication date: March 10, 2011
    Inventor: Isao Nakazawa
  • Patent number: 7729129
    Abstract: In a package mounting structure for mounting a package on a case, wherein the package internally incorporates at least one of a high-frequency transistor, MIC and MMIC used in the microwave to millimeter-wave band, and a base thereof is formed of metal and serves as ground, an electrically conductive sheet having excellent thermal conductivity and exhibiting restorability and having a size identical with that of the base of the package is laid on the case at a package-bearing location, the package and sheet are fastened together by two or more screws, and the sheet is mounted on the case while it is pressed by a pressing force of 10 N/cm2 or greater owing to fastening.
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: June 1, 2010
    Assignee: Fujitsu Limited
    Inventors: Masafumi Shigaki, Isao Nakazawa, Kazunori Yamanaka
  • Patent number: 7582854
    Abstract: A focus detection apparatus comprising a focus detection unit adapted to employ a photoelectric conversion element to detect a relative positional relationship between a pair of object images corresponding to a focus detection field; and wherein the focus detection unit are switchable between a first mode of operation in which such an object image corresponding to a focus detection field is detected by using a first number of areas of the photoelectric conversion element, and a second mode of operation in which such an object image corresponding to a focus detection field is detected by using a second number of areas of the photoelectric conversion element, different from the first number.
    Type: Grant
    Filed: July 27, 2007
    Date of Patent: September 1, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventor: Isao Nakazawa
  • Patent number: 7495615
    Abstract: An antenna coupling module for electromagnetically coupling a planar antenna and a planar type oxide superconductive high frequency circuit not reducing the antenna effective area and sharply reducing the signal loss due to coupling, comprised of a planar antenna and a substrate forming a planar superconductive high frequency circuit arranged in a perpendicular direction with respect to the element surface of the planar antenna and having the planar antenna and the superconductive high frequency circuit electromagnetically coupled.
    Type: Grant
    Filed: March 3, 2004
    Date of Patent: February 24, 2009
    Assignee: Fujitsu Limited
    Inventors: Kazunori Yamanaka, Isao Nakazawa, Masafumi Shigaki
  • Publication number: 20080144287
    Abstract: In a package mounting structure for mounting a package on a case, wherein the package internally incorporates at least one of a high-frequency transistor, MIC and MMIC used in the microwave to millimeter-wave band, and a base thereof is formed of metal and serves as ground, an electrically conductive sheet having excellent thermal conductivity and exhibiting restorability and having a size identical with that of the base of the package is laid on the case at a package-bearing location, the package and sheet are fastened together by two or more screws, and the sheet is mounted on the case while it is pressed by a pressing force of 10 N/cm2 or greater owing to fastening.
    Type: Application
    Filed: October 17, 2007
    Publication date: June 19, 2008
    Applicant: FUJITSU LIMITED
    Inventors: Masafumi Shigaki, Isao Nakazawa, Kazunori Yamanaka
  • Patent number: 7379023
    Abstract: An antenna device includes a plane-type antenna element, a heat insulation container for blocking heat entering from the outside, the heat insulation container having a radio-wave window allowing a radio wave to pass therethrough, and housing the plane-type antenna element, a waveguide housed in the heat insulation container and arranged between the radio-wave window and an antenna pattern formation surface of the plane-type antenna element, and cooling means for cooling the plane-type antenna element. The waveguide is shaped and dimensioned so that the directivity of the plane-type antenna element is enhanced, and a superconducting film is used for the antenna pattern of the plane-type antenna element.
    Type: Grant
    Filed: June 16, 2006
    Date of Patent: May 27, 2008
    Assignee: Fujitsu Limited
    Inventors: Kazunori Yamanaka, Masafumi Shigaki, Isao Nakazawa
  • Publication number: 20080024764
    Abstract: A focus detection apparatus comprising a focus detection unit adapted to employ a photoelectric conversion element to detect a relative positional relationship between a pair of object images corresponding to a focus detection field; and wherein the focus detection unit are switchable between a first mode of operation in which such an object image corresponding to a focus detection field is detected by using a first number of areas of the photoelectric conversion element, and a second mode of operation in which such an object image corresponding to a focus detection field is detected by using a second number of areas of the photoelectric conversion element, different from the first number.
    Type: Application
    Filed: July 27, 2007
    Publication date: January 31, 2008
    Applicant: Canon Kabushiki Kaisha
    Inventor: Isao Nakazawa
  • Patent number: 7285429
    Abstract: In a package mounting structure for mounting a package on a case, wherein the package internally incorporates at least one of a high-frequency transistor, MIC and MMIC used in the microwave to millimeter-wave band, and a base thereof is formed of metal and serves as ground, an electrically conductive sheet having excellent thermal conductivity and exhibiting restorability and having a size identical with that of the base of the package is laid on the case at a package-bearing location, the package and sheet are fastened together by two or more screws, and the sheet is mounted on the case while it is pressed by a pressing force of 10 N/cm2 or greater owing to fastening.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: October 23, 2007
    Assignee: Fujitsu Limited
    Inventors: Masafumi Shigaki, Isao Nakazawa, Kazunori Yamanaka
  • Patent number: 7283855
    Abstract: A dielectric waveguide which comprises a first single crystal magnesium oxide block having a surface of face (001), (100) or (010) and a first copper oxide superconducting film formed on the above-described surface in a c-axis crystal orientation perpendicular to the surface, and a method of production thereof are provided.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: October 16, 2007
    Assignee: Fujitsu Limited
    Inventors: Kazunori Yamanaka, Akihiko Akasegawa, Masafumi Shigaki, Isao Nakazawa
  • Patent number: 7177599
    Abstract: A line quality characteristic evaluation system for estimating a line quality characteristic under an interference environment including nonlinear interference for a wireless communication system including at least one interfering wireless line, including a line quality estimating unit estimating the line quality of a wireless communication line under a nonlinear interference wireless line in an area in which wireless communication lines and interfering wireless lines are present together based on nonlinear distortion included by all wireless lines and expressed by an intercept point input level (IIP), a reception equivalent band limitation expressed by attenuation of the intercept point input level (IIP), reception side thermal noise of the wireless communication lines, and leakage power from other interfering wireless lines leaking into the reception equivalent band.
    Type: Grant
    Filed: August 19, 2003
    Date of Patent: February 13, 2007
    Assignees: Fujitsu Limited, National Institute of Information and Communications Technology, KDDI Corporation
    Inventors: Isao Nakazawa, Yoshiaki Kobayashi, Ryoichi Shimada, Toshikazu Youkai, Tatsuaki Hamai, Kaoru Murakami, Hiroyo Ogawa
  • Publication number: 20070001910
    Abstract: An antenna device includes a plane-type antenna element, a heat insulation container for blocking heat entering from the outside, the heat insulation container having a radio-wave window allowing a radio wave to pass therethrough, and housing the plane-type antenna element, a waveguide housed in the heat insulation container and arranged between the radio-wave window and an antenna pattern formation surface of the plane-type antenna element, and cooling means for cooling the plane-type antenna element. The waveguide is shaped and dimensioned so that the directivity of the plane-type antenna element is enhanced, and a superconducting film is used for the antenna pattern of the plane-type antenna element.
    Type: Application
    Filed: June 16, 2006
    Publication date: January 4, 2007
    Applicant: FUJITSU LIMITED
    Inventors: Kazunori Yamanaka, Masafumi Shigaki, Isao Nakazawa
  • Patent number: 7107011
    Abstract: An interference measurement and evaluation system for accurately estimating an interference characteristic of a receiving side including nonlinear interference for a wireless communications system, having a transmission signal for wireless communication and an interference signal between an interfered side and the receiving side, provided with a nonlinear interfering side giving an interference signal having a level unable to be neglected compared with the level of the modulated carrier transmitted from the interfered side, and provided with an interference characteristic estimating means for estimating an interference characteristic including a nonlinear interference characteristic possessed by the receiving side in accordance with a received signal level and a received level when a nonlinear interference theoretical curve given in relation with the line quality satisfies a predetermined line quality.
    Type: Grant
    Filed: August 19, 2003
    Date of Patent: September 12, 2006
    Assignees: Fujitsu Limited, National Institute of Information and Communications Technology, KDDI Corporation
    Inventors: Isao Nakazawa, Yoshiaki Kobayashi, Ryoichi Shimada, Toshikazu Youkai, Tatsuaki Hamai, Kaoru Murakami, Hiroyo Ogawa
  • Patent number: 6859029
    Abstract: A monitoring system for high-frequency circuits which minimizes the insertion loss of additional monitoring circuits while requiring only a small space. An input coupler is placed at the input of a high-frequency circuit whose frequency response is to be monitored. The input coupler has a space where a given high-frequency probing signal can propagate, and it combines this propagating signal with a given electrical input signal. The combined signal is processed by the high-frequency circuit, and the resulting signal is supplied to an output coupler. The output coupler has a space for propagation of a high-frequency probing signal component contained in the received combined signal. The output coupler extracts this propagating signal component for the purpose of monitoring.
    Type: Grant
    Filed: July 24, 2003
    Date of Patent: February 22, 2005
    Assignee: Fujitsu Limited
    Inventors: Kazunori Yamanaka, Isao Nakazawa, Masafumi Shigaki, Manabu Kai
  • Publication number: 20050029546
    Abstract: In a package mounting structure for mounting a package on a case, wherein the package internally incorporates at least one of a high-frequency transistor, MIC and MMIC used in the microwave to millimeter-wave band, and a base thereof is formed of metal and serves as ground, an electrically conductive sheet having excellent thermal conductivity and exhibiting restorability and having a size identical with that of the base of the package is laid on the case at a package-bearing location, the package and sheet are fastened together by two or more screws, and the sheet is mounted on the case while it is pressed by a pressing force of 10 N/cm2 or greater owing to fastening.
    Type: Application
    Filed: August 27, 2004
    Publication date: February 10, 2005
    Inventors: Masafumi Shigaki, Isao Nakazawa, Kazunori Yamanaka
  • Publication number: 20040189533
    Abstract: An antenna coupling module for electromagnetically coupling a planar antenna and a planar type oxide superconductive high frequency circuit not reducing the antenna effective area and sharply reducing the signal loss due to coupling, comprised of a planar antenna and a substrate forming a planar superconductive high frequency circuit arranged in a perpendicular direction with respect to the element surface of the planar antenna and having the planar antenna and the superconductive high frequency circuit electromagnetically coupled.
    Type: Application
    Filed: March 3, 2004
    Publication date: September 30, 2004
    Applicant: FUJITSU LIMITED
    Inventors: Kazunori Yamanaka, Isao Nakazawa, Masafumi Shigaki
  • Publication number: 20040179484
    Abstract: A line quality characteristic evaluation system for estimating a line quality characteristic under an interference environment including nonlinear interference for a wireless communication system including at least one interfering wireless line, including a line quality estimating unit estimating the line quality of a wireless communication line under a nonlinear interference wireless line in an area in which wireless communication lines and interfering wireless lines are present together based on nonlinear distortion included by all wireless lines and expressed by an intercept point input level (IIP), a reception equivalent band limitation expressed by attenuation of the intercept point input level (IIP), reception side thermal noise of the wireless communication lines, and leakage power from other interfering wireless lines leaking into the reception equivalent band.
    Type: Application
    Filed: August 19, 2003
    Publication date: September 16, 2004
    Inventors: Isao Nakazawa, Yoshiaki Kobayashi, Ryoichi Shimada, Toshikazu Youkai, Tatsuaki Hamai, Kaoru Murakami, Hiroyo Ogawa
  • Publication number: 20040171351
    Abstract: An interference measurement and evaluation system for accurately estimating an interference characteristic of a receiving side including nonlinear interference for a wireless communications system, having a transmission signal for wireless communication and an interference signal between a transmitting means and receiving means, provided with a nonlinear interfering means for giving an interference signal having a level unable to be neglected compared with the level of the modulated carrier transmitted from the transmitting means, and provided with an interference characteristic estimating means for estimating an interference characteristic including a nonlinear interference characteristic possessed by a receiving means in accordance with a received signal level and a received level when a nonlinear interference theoretical curve given in relation with the line quality satisfies a predetermined line quality.
    Type: Application
    Filed: August 19, 2003
    Publication date: September 2, 2004
    Inventors: Isao Nakazawa, Yoshiaki Kobayashi, Ryoichi Shimada, Toshikazu Youkai, Tatsuaki Hamai, Kaoru Murakami, Hiroyo Ogawa