Patents by Inventor Takamasa Ishii

Takamasa Ishii 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).

  • Publication number: 20230258834
    Abstract: A sensor board comprising a substrate comprising a pixel region where pixels are arranged on a first surface of two surfaces, a scintillator arranged on one of the first surface and a second surface of the two surfaces and a light shielding member arranged on the surface on which the scintillator is arranged, is provided. The pixel region comprises a first region where a signal for radiation image is generated and a second region where a signal for correcting a signal output from the first region is generated. The scintillator is arranged to overlap the first region but not to overlap the second region. The light shielding member is arranged to cover the scintillator and overlap the second region. A portion of the light shielding member overlapping the second region is bonded to the surface on which the scintillator is arranged.
    Type: Application
    Filed: February 2, 2023
    Publication date: August 17, 2023
    Inventors: MASAO INA, TAKAMASA ISHII, MASATO OFUJI, KATSURO TAKENAKA
  • Publication number: 20230204803
    Abstract: A method of operating a radiation imaging apparatus including a sensor substrate which includes a plurality of pixels arranged in a matrix, each pixel including a conversion element configured to convert radiation or light into an electric charge and accumulate the electric charge and a switch element. The method includes, supplying a first driving potential to set the switch element in a non-conductive state, changing a bias potential supplied to a second terminal of the conversion element to remain a charge in the conversion element, supplying a second driving potential to the switch element to readout a remaining charge, and calculating a threshold voltage of the switch element based on the remaining charge.
    Type: Application
    Filed: December 19, 2022
    Publication date: June 29, 2023
    Inventors: MASATO OFUJI, KATSURO TAKENAKA, MASAO INA, TAKAMASA ISHII
  • Patent number: 11644582
    Abstract: A radiation imaging apparatus including: a first scintillator layer configured to convert a radiation (R) which has entered the first scintillator layer into light; a second scintillator layer configured to convert a radiation transmitted through the first scintillator layer into light; a fiber optic plate (FOP) provided between the first scintillator layer and the second scintillator layer; and an imaging portion configured to convert the light generated in the first scintillator layer and the light generated in the second scintillator layer into an electric signal.
    Type: Grant
    Filed: October 29, 2020
    Date of Patent: May 9, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takamasa Ishii, Kosuke Terui, Kota Nishibe, Tomohiro Hoshina
  • Publication number: 20220187481
    Abstract: A method of manufacturing a radiation imaging apparatus includes electrically connecting a first surface of a flexible insulating layer to a conductive portion of a circuit substrate, covering an exposed portion of the conductive portion with a protection layer, and separating the flexible insulating layer from a substrate in contact with a second surface of the flexible insulating layer. The circuit substrate includes an integrated circuit mounted on the circuit substrate. The flexible insulating layer includes, on the first surface, a plurality of pixels arranged in a two-dimensional matrix to convert radiation into an electrical signal. The second surface of the flexible insulating layer is opposite to the first surface of the flexible insulating layer. The flexible insulating layer is separated from the substrate by irradiating the second surface with light transmitting through the substrate.
    Type: Application
    Filed: December 3, 2021
    Publication date: June 16, 2022
    Inventors: Masato Ofuji, Yoshito Sasaki, Masato Inoue, Takamasa Ishii
  • Patent number: 11269087
    Abstract: A scintillator panel including a scintillator layer that converts incident radiation into light and a scintillator base that supports the scintillator layer, a sensor panel including a sensor substrate that is disposed on a side of the scintillator layer that is opposite to the scintillator base and has a photoelectric conversion portion that converts the light into an electric signal, and a sensor base that is disposed on the side of the sensor substrate that is opposite to the scintillator layer and supports the sensor substrate, and a sealing member that seals a gap between the scintillator panel and the sensor panel at an edge of the scintillator panel are comprised. The sensor panel is provided with a convex member for narrowing the gap at a position in a vertical direction to a surface of the sensor panel from the edge of the scintillator panel.
    Type: Grant
    Filed: August 18, 2020
    Date of Patent: March 8, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomohiro Hoshina, Takamasa Ishii, Kota Nishibe
  • Patent number: 11226419
    Abstract: A radiation detecting device in which defective adhesion between an adhesive member and end portions of a plurality of sensor substrates is reduced. A radiation detecting device includes a plurality of sensor substrates disposed adjacent to each other, each sensor substrate including a side surface that connects a first surface, where a plurality of photoelectric converting elements are arranged in an array, and an opposing second surface to each other; a scintillator disposed at a side of the first surfaces of the plurality of sensor substrates; and a sheet-like adhesive member for adhering the plurality of sensor substrates and the scintillator to each other, wherein, between the plurality of sensor substrates, the sheet-like adhesive member adheres to the first surfaces and at least portions of the side surfaces such that the sheet-like adhesive member extends and continuously adheres from the first surfaces to the at least portions of the side surfaces.
    Type: Grant
    Filed: February 19, 2020
    Date of Patent: January 18, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Shinji Ono, Takamasa Ishii, Kota Nishibe
  • Patent number: 11086030
    Abstract: A radiation imaging apparatus includes a sensor base, a sensor array that includes a plurality of sensor chips arranged in an array, and in which three or more sensor chips out of the plurality of sensor chips are arranged in one row of the sensor array, a scintillator positioned on a side opposite to the sensor base with respect to the sensor array, a bonding member that bonds the sensor array and the scintillator, and a plurality of bonding sheets that are separated from each other and bond the sensor base and the plurality of sensor chips. Two adjacent sensor chips out of the three or more sensor chips are bonded to the sensor base using separate bonding sheets out of the plurality of bonding sheets.
    Type: Grant
    Filed: July 16, 2019
    Date of Patent: August 10, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kota Nishibe, Takamasa Ishii, Tomohiro Hoshina
  • Publication number: 20210132240
    Abstract: A radiation imaging apparatus including: a first scintillator layer configured to convert a radiation (R) which has entered the first scintillator layer into light; a second scintillator layer configured to convert a radiation transmitted through the first scintillator layer into light; a fiber optic plate (FOP) provided between the first scintillator layer and the second scintillator layer; and an imaging portion configured to convert the light generated in the first scintillator layer and the light generated in the second scintillator layer into an electric signal.
    Type: Application
    Filed: October 29, 2020
    Publication date: May 6, 2021
    Inventors: Takamasa Ishii, Kosuke Terui, Kota Nishibe, Tomohiro Hoshina
  • Publication number: 20200379130
    Abstract: A scintillator panel including a scintillator layer that converts incident radiation into light and a scintillator base that supports the scintillator layer, a sensor panel including a sensor substrate that is disposed on a side of the scintillator layer that is opposite to the scintillator base and has a photoelectric conversion portion that converts the light into an electric signal, and a sensor base that is disposed on the side of the sensor substrate that is opposite to the scintillator layer and supports the sensor substrate, and a sealing member that seals a gap between the scintillator panel and the sensor panel at an edge of the scintillator panel are comprised. The sensor panel is provided with a convex member for narrowing the gap at a position in a vertical direction to a surface of the sensor panel from the edge of the scintillator panel.
    Type: Application
    Filed: August 18, 2020
    Publication date: December 3, 2020
    Inventors: Tomohiro Hoshina, Takamasa Ishii, Kota Nishibe
  • Publication number: 20200183022
    Abstract: A radiation detecting device in which defective adhesion between an adhesive member and end portions of a plurality of sensor substrates is reduced. A radiation detecting device includes a plurality of sensor substrates disposed adjacent to each other, each sensor substrate including a side surface that connects a first surface, where a plurality of photoelectric converting elements are arranged in an array, and an opposing second surface to each other; a scintillator disposed at a side of the first surfaces of the plurality of sensor substrates; and a sheet-like adhesive member for adhering the plurality of sensor substrates and the scintillator to each other, wherein, between the plurality of sensor substrates, the sheet-like adhesive member adheres to the first surfaces and at least portions of the side surfaces such that the sheet-like adhesive member extends and continuously adheres from the first surfaces to the at least portions of the side surfaces.
    Type: Application
    Filed: February 19, 2020
    Publication date: June 11, 2020
    Inventors: Shinji Ono, Takamasa Ishii, Kota Nishibe
  • Publication number: 20200025953
    Abstract: A radiation imaging apparatus includes a sensor base, a sensor array that includes a plurality of sensor chips arranged in an array, and in which three or more sensor chips out of the plurality of sensor chips are arranged in one row of the sensor array, a scintillator positioned on a side opposite to the sensor base with respect to the sensor array, a bonding member that bonds the sensor array and the scintillator, and a plurality of bonding sheets that are separated from each other and bond the sensor base and the plurality of sensor chips. Two adjacent sensor chips out of the three or more sensor chips are bonded to the sensor base using separate bonding sheets out of the plurality of bonding sheets.
    Type: Application
    Filed: July 16, 2019
    Publication date: January 23, 2020
    Inventors: Kota Nishibe, Takamasa Ishii, Tomohiro Hoshina
  • Patent number: 10448908
    Abstract: Provided is a radiographic imaging apparatus that is high in sharpness of a picked up image and excellent in DQE by improving the amount of light that enters a photoelectric conversion element, despite a scintillator layer being formed thick. The radiographic imaging apparatus includes: the photoelectric conversion element; and a wavelength converting layer which has a bottom surface located above the photoelectric conversion element and a top surface for receiving an incident radiation ray, and which contains a scintillator layer. The wavelength converting layer has light transmitting properties in at least a region positioned to be above the photoelectric conversion element, and contains the scintillator layer at a density that is lower on the bottom surface side than on the top surface side in the thickness direction of the region.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: October 22, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yoshito Sasaki, Shoshiro Saruta, Takamasa Ishii
  • Patent number: 10345455
    Abstract: A radiation detection apparatus includes a plurality of detection substrates on which photoelectrical conversion elements are arranged, a plate configured to support the plurality of detection substrates, a scintillator, and a plurality of bonding material members configured to bond the plurality of detection substrates and the scintillator. The plurality of bonding material members bond one-side surfaces of the plurality of detection substrates and a one-side surface of the scintillator, and the plurality of bonding material members are separated from each other and arranged so that outer edges of the plurality of bonding material members are not positioned between the plurality of detection substrates.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: July 9, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takamasa Ishii, Kota Nishibe, Tomohiro Hoshina
  • Publication number: 20190033470
    Abstract: A radiation detection apparatus includes a plurality of detection substrates on which photoelectrical conversion elements are arranged, a plate configured to support the plurality of detection substrates, a scintillator, and a plurality of bonding material members configured to bond the plurality of detection substrates and the scintillator. The plurality of bonding material members bond one-side surfaces of the plurality of detection substrates and a one-side surface of the scintillator, and the plurality of bonding material members are separated from each other and arranged so that outer edges of the plurality of bonding material members are not positioned between the plurality of detection substrates.
    Type: Application
    Filed: July 24, 2018
    Publication date: January 31, 2019
    Inventors: Takamasa Ishii, Kota Nishibe, Tomohiro Hoshina
  • Patent number: 9529094
    Abstract: A radiation imaging apparatus for sensing a radiation image, includes a radiation imaging panel including a plurality of imaging substrates and a scintillator having a first face and a second face which oppose each other, a housing configured to house the radiation imaging panel and including a first plate-shaped portion and a second plate-shaped portion, a first support member located between the first face of the scintillator and the first plate-shaped portion of the housing so as to support the scintillator via the plurality of imaging substrates, and a second support member located between the second face of the scintillator and the second plate-shaped portion of the housing so as to support the scintillator.
    Type: Grant
    Filed: September 1, 2015
    Date of Patent: December 27, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takamasa Ishii, Masato Inoue, Kota Nishibe, Shinji Ono
  • Publication number: 20160291172
    Abstract: A radiation detecting device in which defective adhesion between an adhesive member and end portions of a plurality of sensor substrates is reduced. A radiation detecting device includes a plurality of sensor substrates disposed adjacent to each other, each sensor substrate including a side surface that connects a first surface, where a plurality of photoelectric converting elements are arranged in an array, and an opposing second surface to each other; a scintillator disposed at a side of the first surfaces of the plurality of sensor substrates; and a sheet-like adhesive member for adhering the plurality of sensor substrates and the scintillator to each other, wherein, between the plurality of sensor substrates, the sheet-like adhesive member adheres to the first surfaces and at least portions of the side surfaces such that the sheet-like adhesive member extends and continuously adheres from the first surfaces to the at least portions of the side surfaces.
    Type: Application
    Filed: October 30, 2014
    Publication date: October 6, 2016
    Inventors: Shinji Ono, Takamasa Ishii, Kota Nishibe
  • Patent number: 9417338
    Abstract: A radiation image pickup apparatus includes an image pickup panel in which a plurality of image pickup substrates including photoelectric-conversion elements is fixed onto a base, a scintillator portion including a scintillator layer of alkali halide-based columnar crystal and overlaid on the image pickup panel, and a moisture-proof layer provided between the base and the scintillator layer, at least between the plurality of image pickup substrates. The water vapor permeability of the moisture-proof layer is 10 g/m2/day or less.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: August 16, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takamasa Ishii, Masato Inoue, Shinichi Takeda, Satoru Sawada, Taiki Takei, Kota Nishibe
  • Patent number: 9366767
    Abstract: A radiation detecting apparatus includes a scintillator and a photoelectric conversion panel. The photoelectric conversion panel includes a frame member disposed on an outer side of a photoelectric conversion section along at least a portion of one side of the photoelectric conversion panel. The frame member includes an inclined surface having a downward slope toward the photoelectric conversion section. The scintillator includes a first scintillator formed continuously on the inclined surface of the frame member and a surface of the photoelectric conversion section, and a second scintillator formed on the first scintillator. The first scintillator has a non-columnar crystal structure, and the second scintillator has a columnar crystal structure.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: June 14, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masato Inoue, Shinichi Takeda, Satoru Sawada, Takamasa Ishii, Taiki Takei, Kota Nishibe
  • Patent number: 9354333
    Abstract: A radiation detection apparatus, comprising a housing including a first plate portion and a second plate portion arranged to face each other, a scintillator configured to convert radiation into light, supported by a supporting portion arranged in a side of the second plate portion in the housing, a sensor panel including a sensor array in which a plurality of sensors for detecting light are arrayed, interposed between the scintillator and the first plate portion in the housing, and a member interposed between the first plate portion and the sensor panel in the housing, wherein the sensor panel is arranged to position an outer edge of the sensor panel outside an outer edge of the scintillator, and the member is arranged to position an outer edge of the member inside the outer edge of the scintillator.
    Type: Grant
    Filed: May 24, 2013
    Date of Patent: May 31, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masato Inoue, Shinichi Takeda, Satoru Sawada, Takamasa Ishii, Taiki Takei, Kota Nishibe
  • Publication number: 20160097865
    Abstract: Provided is a radiographic imaging apparatus that is high in sharpness of a picked up image and excellent in DQE by improving the amount of light that enters a photoelectric conversion element, despite a scintillator layer being formed thick. The radiographic imaging apparatus includes: the photoelectric conversion element; and a wavelength converting layer which has a bottom surface located above the photoelectric conversion element and a top surface for receiving an incident radiation ray, and which contains a scintillator. The wavelength converting layer has light transmitting properties in at least a region positioned to be above the photoelectric conversion element, and contains the scintillator at a density that is lower on the bottom surface side than on the top surface side in the thickness direction of the region.
    Type: Application
    Filed: September 30, 2015
    Publication date: April 7, 2016
    Inventors: Yoshito Sasaki, Shoshiro Saruta, Takamasa Ishii