Patents by Inventor Shuji Nakamura

Shuji Nakamura 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: 20200259314
    Abstract: A sensing apparatus, an illumination system, and a data communication system including a Vertical Cavity Surface Emitting Laser (VCSEL) or VCSEL array.
    Type: Application
    Filed: October 31, 2018
    Publication date: August 13, 2020
    Applicant: The Regents of the University of California
    Inventors: Jared Kearns, Charles Forman, Dan Cohen, Kenneth S. Kosik, Shuji Nakamura
  • Publication number: 20200244036
    Abstract: A Vertical Cavity Surface Emitting Laser (VCSEL) including a light emitting III-nitride active region including quantum wells (QWs), wherein each of the quantum wells have a thickness of more than 8 nm, a cavity length of at least 7 ?, or at least 20 ?, where lambda is a peak wavelength of the light emitted from the active region, layers with reduced surface roughness, a tunnel junction intracavity contact. The VCSEL is flip chip bonded using In-Au bonding. This is the first report of a VCSEL capable of continuous wave operation.
    Type: Application
    Filed: October 2, 2018
    Publication date: July 30, 2020
    Applicant: The Regents of the University of California
    Inventors: Charles Forman, SeungGeun Lee, Erin C. Young, Jared Kearns, Steven P. DenBaars, James S. Speck, Shuji Nakamura
  • Publication number: 20200243334
    Abstract: A method for protecting a semiconductor film comprised of one or more layers during processing. The method includes placing a surface of the semiconductor film in direct contact with a surface of a protective covering, such as a separate substrate piece, that forms an airtight or hermetic seal with the surface of the semiconductor film, so as to reduce material degradation and evaporation in the semiconductor film. The method includes processing the semiconductor film under some conditions, such as a thermal annealing and/or controlled ambient, which might cause the semiconductor film's evaporation or degradation without the protective covering.
    Type: Application
    Filed: January 24, 2020
    Publication date: July 30, 2020
    Applicant: The Regents of the University of California
    Inventors: Christian J. Zollner, Michael Iza, James S. Speck, Shuji Nakamura, Steven P. DenBaars
  • Patent number: 10717462
    Abstract: A sensor device includes: multiple sensor units, each of which includes multiple sensor elements and a signal processing unit that generates and transmits an output signal including multiple detection signals corresponding to detection values of the sensor elements; and multiple control units, each of which includes a communication unit that receives the output signal, an abnormality monitoring unit that monitors abnormality of the respective sensor unit, and a physical quantity computation unit that computes a physical quantity based on at least one of the detection signals which is normal. One control unit mutually transmits and receives the detection signals as subject sensor signals received from the respective sensor unit and the detection signals as other sensor signals received from another one of the control units with another system control unit.
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: July 21, 2020
    Assignee: DENSO CORPORATION
    Inventors: Atsuko Oka, Shuji Kuramitsu, Koichi Nakamura
  • Publication number: 20200212258
    Abstract: A gallium nitride (GaN) based light emitting diode (LED), wherein light is extracted through a nitrogen face (N-face) of the LED and a surface of the N-face is roughened into one or more hexagonal shaped cones. The roughened surface reduces light reflections occurring repeatedly inside the LED, and thus extracts more light out of the LED. The surface of the N-face is roughened by an anisotropic etching, which may comprise a dry etching or a photo-enhanced chemical (PEC) etching.
    Type: Application
    Filed: September 5, 2019
    Publication date: July 2, 2020
    Inventors: Tetsuo Fujii, Yan Gao, Evelyn L. Hu, Shuji Nakamura
  • Publication number: 20200207408
    Abstract: A motor controller for controlling a motor includes first and second angle sensors detecting motor rotation, and first and second detection circuits detecting rotation number information based on sensor output from the angle sensors. Further, the motor controller includes a steer angle information obtainer obtaining steer angle information involving steering of a vehicle from an external sensor, which is different from the angle sensors, and an abnormality determiner determining abnormality of information that has a matching degree of lower than a preset value when post-conversion information, or value measured by the same characteristics. This information is compared with each other after conversion from the rotation number information and from the steer angle information, and is used by a control amount calculator to calculate a control amount of the motor based on the information determined as having no abnormality by the abnormality determiner.
    Type: Application
    Filed: December 12, 2019
    Publication date: July 2, 2020
    Inventors: Koichi NAKAMURA, Nobuyori NAKAJIMA, Go ENDOH, Yosuke OGI, Atsuko OKA, Shuji KURAMITSU, Takashi SUZUKI, Haruo SUZUKI
  • Patent number: 10685835
    Abstract: A III-nitride tunnel junction with a modified p-n interface, wherein the modified p-n interface includes a delta-doped layer to reduce tunneling resistance. The delta-doped layer may be doped using donor atoms comprised of Oxygen (O), Germanium (Ge) or Silicon (Si); acceptor atoms comprised of Magnesium (Mg) or Zinc (Zn); or impurities comprised of Iron (Fe) or Carbon (C).
    Type: Grant
    Filed: November 1, 2016
    Date of Patent: June 16, 2020
    Assignees: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, KING ABDULAZIZ CITY FOR SCIENCE AND TECHNOLOGY (KACST)
    Inventors: Benjamin P. Yonkee, Erin C. Young, John T. Leonard, Tal Margalith, James S. Speck, Steven P. DenBaars, Shuji Nakamura
  • Publication number: 20200180685
    Abstract: A steering system in a vehicle includes a plurality of subsystems provided with a control unit. The control unit includes a storage unit storing steer angle information regarding a steer angle of one of a steering mechanism and a steered mechanism when the steering mechanism or the steered mechanism stops, an abnormality determiner determining abnormality of the motor rotation detection value and the detection circuit in the plurality of subsystems at a start time of a motor based on a comparison of at least two parameters, and a steer angle calculator calculating the steer angle based on the parameters having been determined by the abnormality determiner as not abnormal.
    Type: Application
    Filed: December 4, 2019
    Publication date: June 11, 2020
    Inventors: Takashi SUZUKI, Shuji KURAMITSU, Nobuyori NAKAJIMA, Go ENDOH, Haruo SUZUKI, Koichi NAKAMURA, Yosuke OGI, Atsuko OKA
  • Publication number: 20200181414
    Abstract: A powder mixture including spherical barium titanate particles and spherical oxide particles and having an average particle diameter of 2 ?m or more and 30 ?m or less, wherein the spherical oxide particles have an average particle diameter of 0.05 ?m or more and 1.5 ?m or less, and the spherical oxide particles are contained in an amount of 0.02% by mass or more and 15% by mass or less based on the powder mixture. The spherical oxide particles are preferably amorphous silicon dioxide particles and/or aluminum oxide particles. According to the present invention, it is possible to provide a spherical barium titanate-based powder which enables to prepare a high dielectric resin composition with which reduced wire sweep amount and burr are achieved.
    Type: Application
    Filed: March 30, 2018
    Publication date: June 11, 2020
    Applicant: DENKA COMPANY LIMITED
    Inventors: Shuji SASAKI, Yuzo NAKAMURA, Kohki ICHIKAWA
  • Patent number: 10668945
    Abstract: A motor control apparatus includes: multiple motor drive circuits that drive at least one motor; and multiple microcomputers that are operated by a microcomputer power source and include a drive signal generator that generates a motor drive signal. The microcomputers include at least one microcomputer including a stop determiner that determines that operation of an own microcomputer is about to be stopped and transmits information as a stop determination signal. A microcomputer having received the stop determination signal from at least one different microcomputer actually stops operation of an own microcomputer.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: June 2, 2020
    Assignee: DENSO CORPORATION
    Inventors: Masaya Taki, Toshimitsu Sakai, Koichi Nakamura, Shuji Kuramitsu
  • Publication number: 20200164629
    Abstract: Provided are a lithographic printing plate precursor having an image-recording layer on an aluminum support, in which the image-recording layer contains a polymerization initiator, an infrared absorber, a polymer particle, and a polymerizable compound, and the polymerizable compound has a) a molecular weight of 1,500 to 3,000, b) a double bond equivalent of 200 or less, and c) a CLog P of 9 or less and a method for producing a lithographic printing plate in which the lithographic printing plate precursor is used.
    Type: Application
    Filed: November 28, 2019
    Publication date: May 28, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Ryo NAKAMURA, Kenjiro ARAKI, Shuji HIRANO, Koji SONOKAWA, Yuuya MIYAGAWA
  • Patent number: 10660504
    Abstract: In a flexible tube insertion apparatus, at least one circuit determines whether an S-shape is formed in an insertion section based on a shape information of the insertion section detected by a detector, determines whether an intersection angle between an extension line of a central axis of the insertion section and a tangential line for the insertion section at an inflection point is enlarged or not based on the shape information, and determines whether or not the stiffness variable portions are provided in a position of the S-shape in the insertion section when it is determined that the S-shape is formed and the intersection angle is enlarged. A stiffness controller increases a stiffness of the stiffness variable portions included in the position of the S-shape in accordance with the determination of the circuit.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: May 26, 2020
    Assignee: OLYMPUS CORPORATION
    Inventors: Shuji Nakamura, Takeshi Takahashi
  • Patent number: 10666179
    Abstract: A control system includes a plurality of control devices each including an initial check unit that performs an initial check before drive control of a rotary electric machine, a transmission/reception unit that transmits/receives an end signal indicating that the initial check is ended, and a drive control unit that performs the drive control of the rotary electric machine after the initial check. The drive control unit starts the drive control of the rotary electric machine when the initial check of the corresponding control device is ended and the end signal is acquired from another control device, and starts the drive control of the rotary electric machine after a lapse of a predetermined time from the start of the initial check of the corresponding control device when the initial check of the corresponding control device is ended and the end signal is not acquired from the another control device.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: May 26, 2020
    Assignee: DENSO CORPORATION
    Inventors: Koichi Nakamura, Shuji Kuramitsu, Atsuko Oka
  • Patent number: 10654518
    Abstract: A motor control apparatus include: multiple motor drive circuits that drives at least one motor; multiple microcomputers that include a drive signal generator, and a drive timing generator; and multiple clock generation circuits. The microcomputers include a synchronization signal transmitter microcomputer as at least one microcomputer that transmits a synchronization signal synchronized with the drive timing of an own microcomputer and synchronizing the drive timing of the microcomputers. The microcomputers include a synchronization signal receiver microcomputer as at least one microcomputer that receives the synchronization signal transmitted from the synchronization signal transmitter microcomputer.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: May 19, 2020
    Assignee: DENSO CORPORATION
    Inventors: Toshimitsu Sakai, Masaya Taki, Shuji Kuramitsu, Koichi Nakamura
  • Patent number: 10658557
    Abstract: A transparent light emitting diode (LED) includes a plurality of III-nitride layers, including an active region that emits light, wherein all of the layers except for the active region are transparent for an emission wavelength of the light, such that the light is extracted effectively through all of the layers and in multiple directions through the layers. Moreover, the surface of one or more of the III-nitride layers may be roughened, textured, patterned or shaped to enhance light extraction.
    Type: Grant
    Filed: September 12, 2019
    Date of Patent: May 19, 2020
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Shuji Nakamura, Steven P. DenBaars, Hirokuni Asamizu
  • Patent number: 10644213
    Abstract: A transparent light emitting diode (LED) includes a plurality of III-nitride layers, including an active region that emits light, wherein all of the layers except for the active region are transparent for an emission wavelength of the light, such that the light is extracted effectively through all of the layers and in multiple directions through the layers. Moreover, the surface of one or more of the III-nitride layers may be roughened, textured, patterned or shaped to enhance light extraction.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: May 5, 2020
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Shuji Nakamura, Steven P. DenBaars, Hirokuni Asamizu
  • Publication number: 20200114967
    Abstract: A rotation detection device includes a plurality of detectors each including a plurality of calculators respectively calculating a detection value. A control unit of the rotation detection device monitors abnormality of detection values respectively detected by the plurality of detectors, and, when determining abnormality, identifies a calculator calculating an abnormal detection value based on a result of comparison between the detection values of the plurality of calculators. Then, the control unit continues calculation of an absolute angle by using the detection values from the calculators other than the identified calculator.
    Type: Application
    Filed: October 9, 2019
    Publication date: April 16, 2020
    Inventors: Nobuyori NAKAJIMA, Haruo SUZUKI, Takashi SUZUKI, Go ENDOH, Koichi NAKAMURA, Yosuke OGI, Atsuko OKA, Shuji KURAMITSU
  • Publication number: 20200114961
    Abstract: A rotation detector has a first controller that monitors abnormality of a rotation number calculated by a rotation number calculator based on the calculated rotation number and a preset rotation angle. The first controller in a first system is configured to output rotation information calculated by a second controller in a second system upon having determination that the rotation number of the first system has abnormality, for a continuation of the rotation information calculation.
    Type: Application
    Filed: October 9, 2019
    Publication date: April 16, 2020
    Inventors: Haruo SUZUKI, Nobuyori NAKAJIMA, Koichi NAKAMURA, Go ENDOH, Atsuko OKA, Takashi SUZUKI, Yosuke OGI, Shuji KURAMITSU
  • Publication number: 20200100653
    Abstract: A flexible tube insertion device includes a flexible tube section, at least one variable stiffness unit, at least one state detector, and a stiffness controller. The flexible tube section is segmented along an axial direction into segments and configured to be inserted into an insertion target. The variable stiffness unit is configured to vary bending stiffness of the flexible tube section in units at least one segment. The state detector is configured to detect information relating to shape information of the flexible tube section. The stiffness controller is configured to cause the variable stiffness unit to reduce bending stiffness of a portion of the flexible tube section including a place where the flexible tube section is easy to bend in units of at least one segment based on the shape information.
    Type: Application
    Filed: November 18, 2019
    Publication date: April 2, 2020
    Applicant: OLYMPUS CORPORATION
    Inventor: Shuji NAKAMURA
  • Patent number: D880367
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: April 7, 2020
    Assignee: SUZUKI MOTOR CORPORATION
    Inventors: Toshiyuki Koike, Shuji Matsuzawa, Tatsuya Nakamura, Rodolfo Frascoli