Patents by Inventor Akihiko Yoshikawa

Akihiko Yoshikawa 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: 9530920
    Abstract: A photoelectric conversion device which is a semiconductor device comprising a first conductive layer having a first conductivity type; a second conductive layer formed on the first conductive layer and having a second conductivity type; and a photosensitizing layer formed between the first conductive layer and the second conductive layer, wherein charge carriers generated by photoelectric conversion in the photosensitizing layer are freely movable to at least one of the first conductive layer and the second conductive layer.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: December 27, 2016
    Assignee: National University Corporation Chiba University
    Inventors: Akihiko Yoshikawa, Yoshihiro Ishitani, Kazuhide Kusakabe
  • Patent number: 9509124
    Abstract: A photoelectric conversion device which inhibits characteristic degradation caused by crystal defects, and an inspection method for crystal defects in photoelectric conversion devices. The photoelectric conversion device is provided with an active layer, and a deactivator contained in the active layer.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: November 29, 2016
    Assignee: NATIONAL UNIVERSITY CORPORATION CHIBA UNIVERSITY
    Inventors: Akihiko Yoshikawa, Yoshihiro Ishitani, Kazuhide Kusakabe
  • Patent number: 9444000
    Abstract: A solar cell is provided with: a first conductivity layer comprising a first conductivity type material; a sensitizer layer formed on the first conductivity layer; and a second conductivity layer comprising a second conductivity type material and formed on the sensitizer layer. At least one of the first conductivity layer, the second conductivity layer and the sensitizer layer has a first semiconductor of a first film thickness and a second semiconductor of a second film thickness.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: September 13, 2016
    Assignee: NATIONAL UNIVERSITY CORPORATION CHIBA UNIVERSITY
    Inventors: Akihiko Yoshikawa, Yoshihiro Ishitani, Kazuhide Kusakabe
  • Patent number: 8699129
    Abstract: A microscope system improves the operability of a user in performing a microscope observation. The microscope system attains the improvement by including: a microscope apparatus including a plurality of drive units; a display unit for displaying an operation screen for operation of the microscope apparatus; a pointing device for inputting by a pointer an operation instruction to the microscope apparatus on the operation screen; and a control unit for switching the drive units depending on the position of the pointer on the operation screen, and controlling the operation of the switched drive units depending on the operation of the pointing device.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: April 15, 2014
    Assignee: Olympus Corporation
    Inventors: Tetsuya Shirota, Yasuko Ishii, Akihiko Yoshikawa, Izumi Sakuma
  • Publication number: 20130208267
    Abstract: Disclosed is a photoelectric conversion device which inhibits characteristic degradation caused by crystal defects, and an inspection method for crystal defects in photoelectric conversion devices. The photoelectric conversion device is provided with an active layer, and a deactivator contained in the active layer.
    Type: Application
    Filed: March 14, 2011
    Publication date: August 15, 2013
    Inventors: Akihiko Yoshikawa, Yoshihiro Ishitani, Kazuhide Kusakabe
  • Publication number: 20130174894
    Abstract: A solar cell is provided with: a first conductivity layer comprising a first conductivity type material; a sensitizer layer formed on the first conductivity layer; and a second conductivity layer comprising a second conductivity type material and formed on the sensitizer layer. At least one of the first conductivity layer, the second conductivity layer and the sensitizer layer has a first semiconductor of a first film thickness and a second semiconductor of a second film thickness.
    Type: Application
    Filed: June 17, 2011
    Publication date: July 11, 2013
    Inventors: Akihiko Yoshikawa, Yoshihiro Ishitani, Kazuhide Kusakabe
  • Publication number: 20130016345
    Abstract: Disclosed is a photoelectric conversion device which inhibits characteristic degradation caused by crystal defects, and an inspection method for crystal defects in photoelectric conversion devices. The photoelectric conversion device is provided with an active layer, and a deactivator contained in the active layer.
    Type: Application
    Filed: March 14, 2011
    Publication date: January 17, 2013
    Inventors: Akihiko Yoshikawa, Yoshihiro Ishitani, Kazuhide Kusakabe
  • Patent number: 8280142
    Abstract: An object of the present invention is to provide a predetermined site luminescence measuring method and a predetermined site luminescence measuring apparatus, which allow for determining whether, when the luminescence from the predetermined site in live samples is measured, a photoprotein is localized at the predetermined site in the same ones as the samples.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: October 2, 2012
    Assignee: Olympus Corporation
    Inventors: Hirobumi Suzuki, Yoko Ohashi, Kenji Kawasaki, Kiyotsugu Kojima, Kenichi Koyama, Akihiko Yoshikawa
  • Patent number: 8268075
    Abstract: A method of producing a zinc oxide-based semiconductor crystal, including: introducing at least zinc and oxygen on a surface of a substrate; and growing a zinc oxide-based semiconductor crystal on the substrate, wherein a total or partial portion of the zinc is ionized in a vacuum atmosphere of 1×10?4 Torr or less and is introduced to the surface of the substrate to grow the ZnO based semiconductor crystal. As a result, it is possible to provide a method of producing a zinc oxide based semiconductor crystal capable of growing a zinc oxide semiconductor crystal having excellent surface flatness and crystallinity and including an extremely small amount of impurities at a high growth rate.
    Type: Grant
    Filed: June 22, 2007
    Date of Patent: September 18, 2012
    Assignees: Fujikura Ltd., Chiba University
    Inventors: Koji Omichi, Yoshikazu Kaifuchi, Munehisa Fujimaki, Akihiko Yoshikawa
  • Publication number: 20120186640
    Abstract: A photoelectric conversion device which is a semiconductor device comprising a first conductive layer having a first conductivity type; a second conductive layer formed on the first conductive layer and having a second conductivity type; and a photosensitizing layer formed between the first conductive layer and the second conductive layer, wherein charge carriers generated by photoelectric conversion in the photosensitizing layer are freely movable to at least one of the first conductive layer and the second conductive layer.
    Type: Application
    Filed: August 5, 2010
    Publication date: July 26, 2012
    Applicant: NATIONAL UNIVERSITY CORPORATION CHIBA UNIVERSITY
    Inventors: Akihiko Yoshikawa, Yoshihiro Ishitani, Kazuhide Kusakabe
  • Patent number: 8194313
    Abstract: A microscope includes an illuminating unit that includes an excitation light source emitting an excitation light, and a phosphor receiving the excitation light and emitting illumination light in a specific wavelength range. The illuminating unit illuminates a specimen with the illumination light. The microscope also includes an observation unit for observing the specimen illuminated by the illuminating unit.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: June 5, 2012
    Assignee: Olympus Corporation
    Inventors: Akihiko Yoshikawa, Atsuhiro Tsuchiya, Masahiro Aoki
  • Publication number: 20110249137
    Abstract: An object of the present invention is to provide a predetermined site luminescence measuring method and a predetermined site luminescence measuring apparatus, which allow for determining whether, when the luminescence from the predetermined site in live samples is measured, a photoprotein is localized at the predetermined site in the same ones as the samples.
    Type: Application
    Filed: June 20, 2011
    Publication date: October 13, 2011
    Applicant: OLYMPUS CORPORATION
    Inventors: Hirobumi SUZUKI, Yoko OHASHI, Kenji KAWASAKI, Kiyotsugu KOJIMA, Kenichi KOYAMA, Akihiko YOSHIKAWA
  • Patent number: 7986824
    Abstract: An object of the present invention is to provide a predetermined site luminescence measuring method and a predetermined site luminescence measuring apparatus, which allow for determining whether, when the luminescence from the predetermined site in live samples is measured, a photoprotein is localized at the predetermined site in the same ones as the samples.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: July 26, 2011
    Assignee: Olympus Corporation
    Inventors: Hirobumi Suzuki, Yoko Ohashi, Kenji Kawasaki, Kiyotsugu Kojima, Kenichi Koyama, Akihiko Yoshikawa
  • Publication number: 20110170181
    Abstract: A microscope includes an illuminating unit that includes an excitation light source emitting an excitation light, and a phosphor receiving the excitation light and emitting illumination light in a specific wavelength range. The illuminating unit illuminates a specimen with the illumination light. The microscope also includes an observation unit for observing the specimen illuminated by the illuminating unit.
    Type: Application
    Filed: March 18, 2011
    Publication date: July 14, 2011
    Applicant: OLYMPUS CORPORATION
    Inventors: Akihiko Yoshikawa, Atsuhiro Tsuchiya, Masahiro Aoki
  • Publication number: 20110164314
    Abstract: A microscope system improves the operability of a user in performing a microscope observation. The microscope system attains the improvement by including: a microscope apparatus including a plurality of drive units; a display unit for displaying an operation screen for operation of the microscope apparatus; a pointing device for inputting by a pointer an operation instruction to the microscope apparatus on the operation screen; and a control unit for switching the drive units depending on the position of the pointer on the operation screen, and controlling the operation of the switched drive units depending on the operation of the pointing device.
    Type: Application
    Filed: March 21, 2011
    Publication date: July 7, 2011
    Applicant: OLYMPUS CORPORATION
    Inventors: Tetsuya Shirota, Yasuko Ishii, Akihiko Yoshikawa, Izumi Sakuma
  • Patent number: 7945108
    Abstract: The present invention provides a control method for a microscope apparatus, comprising: a first step for recognizing a type of a specimen retention member retaining a specimen; a second step for obtaining a first image including the whole image of a specimen retention member showing a picture of the entirety of the specimen retention member and an image of the specimen, and obtaining a second image including only the whole image of the specimen retention member in accordance with the type of the specimen retention member; and a third step for obtaining a macro observation image with a self fluorescence removed except for the specimen based on the first image and second image.
    Type: Grant
    Filed: August 17, 2007
    Date of Patent: May 17, 2011
    Assignee: Olympus Corporation
    Inventors: Takayuki Kono, Akihiko Yoshikawa
  • Patent number: 7825360
    Abstract: This is an optical apparatus provided with an objective with a correction collar for correcting aberration due to an error in the optical thickness of a piece of cover glass comprising a focusing mechanism for changing a distance between the objective and the sample, an optical thickness detecting unit for detecting the optical thickness of the cover glass, an operating unit for calculating the amount of aberration correction, based on the optical thickness of the cover glass detected by the optical thickness detecting unit, a driver unit for driving a correction collar, based on the amount of aberration correction calculated by the operating unit and an imaging sensor for forming the image of the sample that passes through the objective.
    Type: Grant
    Filed: April 29, 2008
    Date of Patent: November 2, 2010
    Assignee: Olympus Corporation
    Inventors: Masayoshi Karasawa, Akihiko Yoshikawa, Kazuhiro Hayashi
  • Publication number: 20090274360
    Abstract: An object of the present invention is to provide a predetermined site luminescence measuring method and a predetermined site luminescence measuring apparatus, which allow for determining whether, when the luminescence from the predetermined site in live samples is measured, a photoprotein is localized at the predetermined site in the same ones as the samples.
    Type: Application
    Filed: March 30, 2006
    Publication date: November 5, 2009
    Applicant: Olympus Corporation
    Inventors: Hirobumi Suzuki, Yoko Ohashi, Kenji Kawasaki, Kiyotsugu Kojima, Kenichi Koyama, Akihiko Yoshikawa
  • Publication number: 20090260563
    Abstract: A method of producing a zinc oxide-based semiconductor crystal, including: introducing at least zinc and oxygen on a surface of a substrate; and growing a zinc oxide-based semiconductor crystal on the substrate, wherein a total or partial portion of the zinc is ionized in a vacuum atmosphere of 1×10?4 Torr or less and is introduced to the surface of the substrate to grow the ZnO based semiconductor crystal. As a result, it is possible to provide a method of producing a zinc oxide based semiconductor crystal capable of growing a zinc oxide semiconductor crystal having excellent surface flatness and crystallinity and including an extremely small amount of impurities at a high growth rate.
    Type: Application
    Filed: June 22, 2007
    Publication date: October 22, 2009
    Applicants: Fujikura Ltd., Chiba University
    Inventors: Koji Omichi, Yoshikazu Kaifuchi, Munehisa Fujimaki, Akihiko Yoshikawa
  • Publication number: 20080310016
    Abstract: This is an optical apparatus provided with an objective with a correction collar for correcting aberration due to an error in the optical thickness of a piece of cover glass comprising a focusing mechanism for changing a distance between the objective and the sample, an optical thickness detecting unit for detecting the optical thickness of the cover glass, an operating unit for calculating the amount of aberration correction, based on the optical thickness of the cover glass detected by the optical thickness detecting unit, a driver unit for driving a correction collar, based on the amount of aberration correction calculated by the operating unit and an imaging sensor for forming the image of the sample that passes through the objective.
    Type: Application
    Filed: April 29, 2008
    Publication date: December 18, 2008
    Applicant: Olympus Corporation
    Inventors: Masayoshi Karasawa, Akihiko Yoshikawa, Kazuhiro Hayashi