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).

  • 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: 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: 10593854
    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 13, 2019
    Date of Patent: March 17, 2020
    Assignee: The Regents of the University of California
    Inventors: Shuji Nakamura, Steven P. DenBaars, Hirokuni Asamizu
  • Patent number: 10529892
    Abstract: A method for growth and fabrication of semipolar (Ga,Al,In,B)N thin films, heterostructures, and devices, comprising identifying desired material properties for a particular device application, selecting a semipolar growth orientation based on the desired material properties, selecting a suitable substrate for growth of the selected semipolar growth orientation, growing a planar semipolar (Ga,Al,In,B)N template or nucleation layer on the substrate, and growing the semipolar (Ga,Al,In,B)N thin films, heterostructures or devices on the planar semipolar (Ga,Al,In,B)N template or nucleation layer. The method results in a large area of the semipolar (Ga,Al,In,B)N thin films, heterostructures, and devices being parallel to the substrate surface.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: January 7, 2020
    Assignees: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, Japan Science and Technology Agency
    Inventors: Robert M. Farrell, Jr., Troy J. Baker, Arpan Chakraborty, Benjamin A. Haskell, P. Morgan Pattison, Rajat Sharma, Umesh K. Mishra, Steven P. DenBaars, James S. Speck, Shuji Nakamura
  • Publication number: 20200000315
    Abstract: A flexible tube insertion apparatus includes: a flexible tube to be inserted into an insertion target body; a state detector to detect state information of the flexible tube relating to a shape of the flexible tube; and a bent formation determining section to determine whether first and second bent portions bent in different directions are formed on the flexible tube based on the state information. The flexible tube insertion apparatus further includes a shape changing section, arranged in the flexible tube, to actively change the shape of the flexible tube so that an angle at which a first virtual flat plane on which the first bent portion is formed and a second virtual flat plane on which the second bent portion is formed intersect becomes smaller, when the bent formation determining section determines that the first and second bent portions are formed on the flexible tube.
    Type: Application
    Filed: June 19, 2019
    Publication date: January 2, 2020
    Applicant: OLYMPUS CORPORATION
    Inventors: Takeshi Takahashi, Ryo Tezuka, Shuji Nakamura
  • Patent number: 10517461
    Abstract: A flexible tube insertion apparatus includes an insertion section including a plurality of segments, a plurality of stiffness variable portions provided in the respective segments and configured to vary stiffness of the respective segments, and a state detector configured to detect a shape of the insertion section. The apparatus includes a state calculator configured to acquire a shape of a tube at a time when the insertion section advances into the tube, and configured to calculate a relative position of the segment to the tube, and a control device configured to control, based on the shape of the tube, the stiffness variable portion provided in the segment which is calculated the relative position to the tube by the state calculator.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: December 31, 2019
    Assignee: OLYMPUS CORPORATION
    Inventors: Shuji Nakamura, Takeshi Takahashi
  • Publication number: 20190374089
    Abstract: A The flexible tube insertion apparatus includes: a flexible tube section divided into one or more segments; one or more variable stiffness sections to change bending stiffness of the flexible tube section in a segment unit; a state detector to detect information on a bending state of the flexible tube section; a bend determination section to determine whether the flexible tube section bends based on the detected bending state; and a stiffness controller to control the bending stiffness of the flexible tube section in at least one segment unit by changing a bending stiffness value of the variable stiffness section based on information acquired from the bend determination section.
    Type: Application
    Filed: June 24, 2019
    Publication date: December 12, 2019
    Applicant: OLYMPUS CORPORATION
    Inventor: Shuji NAKAMURA
  • Patent number: 10495268
    Abstract: A white light emitting device includes an edge-emitting laser diode, such as a III-nitride laser diode, emitting light in a first wavelength range that is converted to light at a longer wavelength by a single crystal, ceramic or polycrystalline phosphor, such as a Ce:YAG single crystal phosphor, wherein the phosphor absorbs only some of the light emitted from the laser diode, such that a combination of remaining light emitted from the laser diode with the light at the longer wavelength emitted from the phosphor results in emission of high-intensity white light from the device. Reflectors on either side of the edge-emitting III-nitride laser diode reflect the light from both ends of the edge-emitting laser diode towards the phosphor. One or more sides of the phosphor may roughened, or a scattering layer may be added, to promote uniform color mixing of the emissions.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: December 3, 2019
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Michael Cantore, Shuji Nakamura, Steven P. DenBaars
  • Patent number: 10485410
    Abstract: An flexible tube insertion apparatus includes a tubular insertion section including a bending portion and a flexible tube portion, variable stiffness sections to cause a change in a level of a bending stiffness of the flexible tube portion, a variable stiffness control section that controls the change in the bending stiffness by the variable stiffness sections; and a time setting section that sets a time period. The variable stiffness control section causes the bending stiffness of the variable stiffness sections to change in such a manner that the relationship of levels between the bending stiffness of adjacent variable stiffness sections is switched at the set time period when the variable stiffness control section determines that the flexible tube portion is passing through a flexure of the subject.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: November 26, 2019
    Assignee: OLYMPUS CORPORATION
    Inventors: Takeshi Takahashi, Yuichi Ikeda, Shuji Nakamura
  • Publication number: 20190341206
    Abstract: A key switch device includes: an operation member to be depressed; a switch disposed below the operation member; a reaction force generating member that is provided between the operation member and the switch, performs elastic buckling deformation by depression of the operation member, gives a reaction force according to the elastic buckling deformation to the operation member; and a depression member that is provided between the operation member and the switch, and depresses the switch; wherein the reaction force generating member includes a supporter that supports the depression member.
    Type: Application
    Filed: July 16, 2019
    Publication date: November 7, 2019
    Applicant: FUJITSU COMPONENT LIMITED
    Inventors: Takeshi NISHINO, Shuji NAKAMURA, Akihiko TAKEMAE, Tamotsu KOIKE
  • Patent number: 10454010
    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: May 24, 2019
    Date of Patent: October 22, 2019
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Shuji Nakamura, Steven P. DenBaars, Hirokuni Asamizu
  • Patent number: 10446714
    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: Grant
    Filed: May 19, 2014
    Date of Patent: October 15, 2019
    Assignees: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, JAPAN SCIENCE AND TECHNOLOGY AGENCY
    Inventors: Tetsuo Fujii, Yan Gao, Evelyn L. Hu, Shuji Nakamura
  • Patent number: 10410806
    Abstract: A key switch device includes: an operation member to be depressed; a switch disposed below the operation member; a reaction force generating member that is provided between the operation member and the switch, performs elastic buckling deformation by depression of the operation member, gives a reaction force according to the elastic buckling deformation to the operation member; and a depression member that is provided between the operation member and the switch, and depresses the switch; wherein the reaction force generating member includes a supporter that supports the depression member.
    Type: Grant
    Filed: June 1, 2017
    Date of Patent: September 10, 2019
    Assignee: FUJITSU COMPONENT LIMITED
    Inventors: Takeshi Nishino, Shuji Nakamura, Akihiko Takemae, Tamotsu Koike
  • Publication number: 20190273194
    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: Application
    Filed: January 3, 2019
    Publication date: September 5, 2019
    Applicant: The Regents of the University of California
    Inventors: Shuji Nakamura, Steven P. DenBaars, Hirokuni Asamizu
  • Patent number: 10384656
    Abstract: A brake pedal device includes a pedal bracket, an operation pedal, an intermediate lever, and a coupling link. The pedal bracket includes a first side plate member and a second side plate member secured to a dash panel and arranged at interval in a vehicle width direction, and is fastened and secured with respect to a vehicle body side bracket located on a vehicle rear side by a nut and a bolt at one location. The first side plate member and the second side plate member include a deformation allowing part and a deformation allowing part between a first support shaft located on a rearward side among the first support shaft and a second support shaft, and an attachment/securing part and an attachment/securing part.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: August 20, 2019
    Assignees: TOYODA IRON WORKS CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tomohiro Tsuguma, Hiroaki Tsuzuki, Shuji Nakamura, Hirotaka Shinada
  • Publication number: 20190207043
    Abstract: A physical vapor deposition (e.g., sputter deposition) method for III-nitride tunnel junction devices uses metal-organic chemical vapor deposition (MOCVD) to grow one or more light-emitting or light-absorbing structures and electron cyclotron resonance (ECR) sputtering to grow one or more tunnel junctions. In another method, the surface of the p-type layer is treated before deposition of the tunnel junction on the p-type layer. In yet another method, the whole device (including tunnel junction) is grown using MOCVD and the p-type layers of the III-nitride material are reactivated by lateral diffusion of hydrogen through mesa sidewalls in the III-nitride material, with one or more lateral dimensions of the mesa that are less than or equal to about 200 ?m. A flip chip display device is also disclosed.
    Type: Application
    Filed: August 17, 2017
    Publication date: July 4, 2019
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Benjamin P. Yonkee, Asad J. Mughal, David Hwang, Erin C. Young, James S. Speck, Steven P. DenBaars, Shuji Nakamura
  • Publication number: 20190165213
    Abstract: A III-Nitride LED which utilizes n-type III-Nitride layers for current spreading on both sides of the device. A multilayer dielectric coating is used underneath the wire bond pads, both LED contacts are deposited in one step, and the p-side wire bond pad is moved off of the mesa. The LED has a wall plug efficiency or External Quantum Efficiency (EQE) over 70%, a fractional EQE droop of less than 7% at 20 A/cm2 drive current and less than 15% at 35 A/cm2 drive current. The LEDs can be patterned into an LED array and each LED can have an edge dimension of between 5 and 50 ?m. The LED emission wavelength can be below 400 nm and aluminum can be added to the n-type III-Nitride layers such that the bandgap of the n-type III-nitride layers is larger than the LED emission photon energy.
    Type: Application
    Filed: August 17, 2017
    Publication date: May 30, 2019
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Benjamin P. Yonkee, Erin C. Young, James S. Speck, Steven P. DenBaars, Shuji Nakamura
  • Publication number: 20190099064
    Abstract: An insertion apparatus includes a flexible tube to be inserted into an insertion target. The flexible tube is divided into segments arranged in series along a central axis. The insertion apparatus also includes a variable stiffness portion that varies a bending stiffness of the flexible tube in units of segments, a detector that detects state information of the flexible tube including velocity information, a calculator that calculates the velocity information of the flexible tube at two portions of the flexible tube based on the state information, and a controller that controls the bending stiffness of the flexible tube in units of segments through the variable stiffness portion based on a velocity ratio calculated based on the velocity information of the two portions.
    Type: Application
    Filed: December 4, 2018
    Publication date: April 4, 2019
    Applicant: OLYMPUS CORPORATION
    Inventor: Shuji NAKAMURA
  • Patent number: 10238787
    Abstract: A blood reservoir (20) for storing blood includes a first storage section (21), a second storage section (22), and a third storage section (23) that is provided between the first storage section and the second storage section, and communicates with the first storage section and the second storage section. A volume of the blood reservoir (20) can be adjusted by changing the amount of expansion or contraction of a bellows structure (28) using a bellows adjustment mechanism (83, 93).
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: March 26, 2019
    Assignee: TRANSELL Co., Ltd.
    Inventors: Hiroaki Takuwa, Satoshi Hirai, Yoshiki Tanaka, Shuji Nakamura, Katsuyuki Sado, Kenta Kaneda