Patents by Inventor Daisuke Yokoyama

Daisuke Yokoyama 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: 20110233701
    Abstract: A photoelectric conversion device comprising a photoelectric conversion part including a first electrode layer, a second electrode layer and a photoelectric conversion layer provided between the first electrode layer and the second electrode layer, wherein light is made incident from an upper part of the second electrode layer into the photoelectric conversion layer; the photoelectric conversion layer generates a charge containing an electron and a hole corresponding to the incident light from the upper part of the second electrode layer; and the first electrode layer works as an electrode for extracting the hole.
    Type: Application
    Filed: April 22, 2011
    Publication date: September 29, 2011
    Applicant: FUJIFILM Corporation
    Inventors: Tetsuro Mitsui, Daisuke Yokoyama
  • Patent number: 8022395
    Abstract: A photoelectric conversion layer comprising a compound represented by the following formula (I): wherein V1, V2, V3 and V4 each independently represents a hydrogen atom or a substituent.
    Type: Grant
    Filed: June 2, 2006
    Date of Patent: September 20, 2011
    Assignee: FUJIFILM Corporation
    Inventors: Takanori Hioki, Itaru Osaka, Daisuke Yokoyama
  • Patent number: 7999339
    Abstract: A photoelectric conversion device comprising a photoelectric conversion part including a first electrode, a second electrode opposing to the first electrode and a photoelectric conversion layer provided between the first electrode and the second electrode, wherein a smoothing layer for reducing roughness of a surface of the photoelectric conversion layer is provided between the first electrode or the second electrode and the photoelectric conversion layer.
    Type: Grant
    Filed: February 8, 2007
    Date of Patent: August 16, 2011
    Assignee: Fujifilm Corporation
    Inventor: Daisuke Yokoyama
  • Patent number: 7965037
    Abstract: An organic electroluminescence device, includes a substrate; an anode layer; an organic layer including at least one organic material having a fluorescence spectrum; and a cathode layer, wherein the organic electroluminescence device has a primary light outgoing direction that is parallel to a surface of the substrate, wherein the organic electroluminescence device has an optical waveguide that includes a core layer formed by the anode layer and the organic layer, and a clad layer formed by the substrate and the cathode layer, and wherein the optical waveguide has cutoff wavelengths in a transverse electric mode any one of which is within a wavelength range of a full width at half maximum of the fluorescence spectrum of any one of the organic materials included in the organic layer.
    Type: Grant
    Filed: August 15, 2008
    Date of Patent: June 21, 2011
    Assignees: Kyushu University, National University Corporation, Rohm Co., Ltd.
    Inventors: Daisuke Yokoyama, Hajime Nakanotani, Masayuki Yahiro, Chihaya Adachi, Masato Moriwake, Dai Ohnishi, Yousuke Setoguchi
  • Patent number: 7952156
    Abstract: A photoelectric conversion device comprising a photo-electric conversion part including a first electrode layer, a second electrode layer and a photoelectric conversion layer provided between the first electrode layer and the second electrode layer, wherein light is made incident from an upper part of the second electrode layer into the photoelectric conversion layer; the photoelectric conversion layer generates a charge containing an electron and a hole corresponding to the incident light from the upper part of the second electrode layer; and the first electrode layer works as an electrode for extracting the hole.
    Type: Grant
    Filed: September 14, 2006
    Date of Patent: May 31, 2011
    Assignee: Fujifilm Corporation
    Inventors: Tetsuro Mitsui, Daisuke Yokoyama
  • Publication number: 20110026801
    Abstract: A magnetic resonance imaging apparatus is provided, characterized by: one pair of static magnetic field generating means disposed sandwiching a space in which a test object is placed; magnetic field generating means configured to apply a high-frequency magnetic field and a gradient magnetic field to the test object placed in the static magnetic field; and receiving means configured to receive a nuclear magnetic resonance signal generated from the test object, and characterized in that: the receiving means includes a receiving coil having a predetermined coil pattern and capable of being shaped into a cylinder; the receiving coil includes flexible parts and rigid parts alternately disposed along the circumference direction when shaped into the cylinder; and the flexible parts include a flexible substrate on which a portion of the predetermined coil pattern is mounted and a air-bubbles-containing resin section for covering the both surfaces of the flexible substrate.
    Type: Application
    Filed: April 7, 2009
    Publication date: February 3, 2011
    Applicant: HITACHI MEDICAL CORPORATION
    Inventors: Masayoshi Dohata, Shizuka Nagai, Daisuke Yokoyama
  • Publication number: 20100327025
    Abstract: A liquid discharging apparatus in which a liquid is flowed in one direction in a circulation flow path at the time of non-discharge, and the flow path is refilled with liquid from both directions at the time of discharge. The liquid discharging apparatus includes a pressure adjustment unit that satisfies a condition “Pu>Pd, Pn>?Pd”, where Pu denotes a fluid pressure at a predetermined position on the upstream side of a discharge port, Pd denotes a fluid pressure at a predetermined position on the downstream side thereof, and Pn denotes a pressure equivalent to a capillary force of the discharge port for absorbing the liquid from the flow path into the discharge port immediately after the liquid has been discharged therefrom.
    Type: Application
    Filed: June 28, 2010
    Publication date: December 30, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Daisuke Yokoyama, Yasuyuki Tamura
  • Patent number: 7750423
    Abstract: A photoelectric conversion device comprising a lower electrode, an upper electrode opposing to the lower electrode and a photoelectric conversion layer provided between the lower electrode and the upper electrode, the photoelectric conversion device being for collecting a photocurrent upon application of a bias voltage between the lower electrode and the upper electrode, wherein the upper electrode works as an electrode in a light incident side, the upper electrode is transparent, and the lower electrode is a metallic electrode having a function to reflect light.
    Type: Grant
    Filed: April 2, 2007
    Date of Patent: July 6, 2010
    Assignee: FUJIFILM Corporation
    Inventor: Daisuke Yokoyama
  • Patent number: 7586528
    Abstract: A color sensor comprises: light reception elements that generate color signals corresponding to stimulus values of colors in an RGB color system, the stimulus values of colors comprising a stimulus value of blue (B) and a stimulus value of red (R), wherein the light reception elements comprise a first light reception element that generates a red (R) color signal corresponding to the stimulus values of red (R); and a first portion that adds a signal corresponding to the stimulus value of blue (B) as a positive sensitivity component to one of: the first light reception element; and a red (R) color signal generated by the first light reception element.
    Type: Grant
    Filed: March 11, 2005
    Date of Patent: September 8, 2009
    Assignee: FUJIFILM Corporation
    Inventors: Toshiaki Fukunaga, Daisuke Yokoyama
  • Patent number: 7582943
    Abstract: The invention provides a light receiving device having a single semiconductor substrate and a short-wavelength light receiving section. The single semiconductor substrate has regions of a first conductivity type and regions of a second (opposite) conductivity type alternately multiply laminated. Each of junction surfaces between the regions of the first conductivity type and the regions of the second conductivity type is formed to have a depth which enables converting light in a wavelength band, which is different from light in other wavelength bands converted by other junction surfaces, to electricity. The short-wavelength light receiving section is provided on or above the incident light surface of the semiconductor substrate and detects light having a wavelength shorter than the central wavelengths of all the respective wavelength bands converted by the junction surfaces. The invention further provides an image pickup device which uses an array of a plurality of the light receiving device.
    Type: Grant
    Filed: June 2, 2005
    Date of Patent: September 1, 2009
    Assignee: FUJIFILM Corporation
    Inventors: Toshiaki Fukunaga, Daisuke Yokoyama
  • Patent number: 7579665
    Abstract: A light receiving device and an image pickup device in which a plurality of light receiving devices are arranged are provided. The light receiving device comprises a single semiconductor substrate and a light receiving device that has a first photoelectric conversion part and a second photoelectric conversion part. The single semiconductor substrate comprises regions of a first conductivity type and regions of a second conductivity type in an alternately multiply stacked manner. Depths of each of the junction surfaces between the regions of first conductivity type and second conductivity type are formed at depths such that light mainly in the blue or red wavelength regions can be photo-electrically converted. The respective detected wavelengths of the first photoelectric conversion part and second photoelectric conversion part are longer than the central wavelength of the blue wavelength region, and shorter than the central wavelength of the red wavelength region.
    Type: Grant
    Filed: July 27, 2005
    Date of Patent: August 25, 2009
    Assignee: FUJIFILM Corporation
    Inventors: Daisuke Yokoyama, Toshiaki Fukunaga
  • Patent number: 7566943
    Abstract: A photoelectric conversion device including a photoelectric conversion part including a pair of electrodes and a photoelectric conversion layer provided between the pair of electrodes, wherein the photoelectric conversion part further includes a first charge blocking layer for reducing an injection of a charge into the photoelectric conversion layer from one of the pair of electrodes when a voltage is applied between the pair of electrodes, the first charge blocking layer being provided between the one of the pair of electrodes and the photoelectric conversion layer; and the first charge blocking layer has a relative dielectric constant larger than a relative dielectric constant of the photoelectric conversion layer.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: July 28, 2009
    Assignee: FUJIFILM Corporation
    Inventor: Daisuke Yokoyama
  • Publication number: 20090058274
    Abstract: There is provided an organic electroluminescence device including of a substrate, an anode layer, an organic layer including at least one organic material and a cathode layer. A primary light outgoing direction of the device is parallel to a surface of the substrate. Any one of cutoff wavelengths in a transverse electric mode of an optical waveguide having a core layer partially formed of the organic layer is within a wavelength range of a full width at half maximum of a fluorescence spectrum of any one of the organic materials included in the organic layer.
    Type: Application
    Filed: August 15, 2008
    Publication date: March 5, 2009
    Applicants: ROHM CO., LTD., KYUSHU UNIVERSITY
    Inventors: Daisuke Yokoyama, Hajime Nakanotani, Masayuki Yahiro, Chihaya Adachi, Masato Moriwake, Dai Ohnishi, Yousuke Setoguchi
  • Publication number: 20070228503
    Abstract: A photoelectric conversion device comprising a lower electrode, an upper electrode opposing to the lower electrode and a photoelectric conversion layer provided between the lower electrode and the upper electrode, the photoelectric conversion device being for collecting a photocurrent upon application of a bias voltage between the lower electrode and the upper electrode, wherein the upper electrode works as an electrode in a light incident side, the upper electrode is transparent, and the lower electrode is a metallic electrode having a function to reflect light.
    Type: Application
    Filed: April 2, 2007
    Publication date: October 4, 2007
    Applicant: FUFJIFILM Corporation
    Inventor: Daisuke Yokoyama
  • Publication number: 20070205477
    Abstract: A photoelectric conversion device including a photoelectric conversion part including a pair of electrodes and a photoelectric conversion layer provided between the pair of electrodes, wherein the photoelectric conversion part further includes a first charge blocking layer for reducing an injection of a charge into the photoelectric conversion layer from one of the pair of electrodes when a voltage is applied between the pair of electrodes, the first charge blocking layer being provided between the one of the pair of electrodes and the photoelectric conversion layer; and the first charge blocking layer has a relative dielectric constant larger than a relative dielectric constant of the photoelectric conversion layer.
    Type: Application
    Filed: March 6, 2007
    Publication date: September 6, 2007
    Applicant: FUJIFILM Corporation
    Inventor: Daisuke Yokoyama
  • Publication number: 20070194400
    Abstract: A photoelectric conversion device comprising a photoelectric conversion part including a first electrode, a second electrode opposing to the first electrode and a photoelectric conversion layer provided between the first electrode and the second electrode, wherein a smoothing layer for reducing roughness of a surface of the photoelectric conversion layer is provided between the first electrode or the second electrode and the photoelectric conversion layer.
    Type: Application
    Filed: February 8, 2007
    Publication date: August 23, 2007
    Inventor: Daisuke Yokoyama
  • Publication number: 20070120045
    Abstract: An organic photoelectric conversion device comprising; a lower electrode; an organic layer; and an upper electrode provided in this order, in which at least one of the lower electrode and the upper electrode is a transparent electrode and an electron is collected in a side of one of the lower electrode and the upper electrode and a hole is collected in a side of other of the lower electrode and the upper electrode so as to read out photocurrent, wherein the electrode in the side of collecting an electron is the transparent electrode and has a word function of 4.5 eV or less.
    Type: Application
    Filed: August 31, 2006
    Publication date: May 31, 2007
    Inventor: Daisuke Yokoyama
  • Publication number: 20070057339
    Abstract: A photoelectric conversion device comprising a photo-electric conversion part including a first electrode layer, a second electrode layer and a photoelectric conversion layer provided between the first electrode layer and the second electrode layer, wherein light is made incident from an upper part of the second electrode layer into the photoelectric conversion layer; the photoelectric conversion layer generates a charge containing an electron and a hole corresponding to the incident light from the upper part of the second electrode layer; and the first electrode layer works as an electrode for extracting the hole.
    Type: Application
    Filed: September 14, 2006
    Publication date: March 15, 2007
    Inventors: Tetsuro Mitsui, Daisuke Yokoyama
  • Publication number: 20060278869
    Abstract: A photoelectric conversion layer comprising a compound represented by the following formula (I): wherein V1, V2, V3 and V4 each independently represents a hydrogen atom or a substituent.
    Type: Application
    Filed: June 2, 2006
    Publication date: December 14, 2006
    Inventors: Takanori Hioki, Itaru Osaka, Daisuke Yokoyama
  • Patent number: D591862
    Type: Grant
    Filed: May 19, 2008
    Date of Patent: May 5, 2009
    Assignee: Hitachi Medical Corporation
    Inventors: Takeshi Taniguchi, Shinichiro Suzuki, Takahide Shimoda, Masayoshi Dohata, Daisuke Yokoyama