Patents by Inventor Hideo Iizuka

Hideo Iizuka 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: 10424678
    Abstract: Double groove diffraction gratings are used in combination with various types of photoelectrodes including dye-sensitized and organic photoelectrodes to increase absorption efficiency as well as to provide one or more of a variety of functions including transparency and reflectivity.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: September 24, 2019
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Hideo Iizuka, Yasuhiko Takeda, Hisayoshi Fujikawa
  • Publication number: 20190266992
    Abstract: Acoustic measurement systems include an enclosure having a high efficiency yet very thin acoustic absorber coating portions thereof, in order to diminish background reflections. The thin acoustic absorber includes a reflective sublayer having a periodic array of indentations on its surface. The periodic array of indentations can be one-dimensional or two dimensional. The thin acoustic absorber further includes a thin absorbing layer overlaid on the reflective sublayer, and typically formed of a viscoelastic foam. The thin acoustic absorber possesses unprecedented absorption efficiency across a broad frequency range and at normal or oblique angles of incidence.
    Type: Application
    Filed: February 26, 2018
    Publication date: August 29, 2019
    Inventors: Taehwa Lee, Hideo Iizuka
  • Publication number: 20190252300
    Abstract: The present invention is intended to provide a semiconductor module and a semiconductor device that are compatible with various rated currents. A semiconductor module includes a lead frame, and a semiconductor element joined with the lead frame. The lead frame includes a first joining structure and a second joining structure. The first joining structure includes a void part as a part at which the lead frame does not exist, and the second joining structure includes a void part as a part at which the lead frame does not exist. Each of the first joining structure and the second joining structure has a shape such that one of the first joining structure and the second joining structure complements at least part of the void part of the other assuming that the first joining structure and the second joining structure are overlapped.
    Type: Application
    Filed: November 8, 2016
    Publication date: August 15, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hideo KOMO, Arata IIZUKA, Takeshi OMARU
  • Publication number: 20180334269
    Abstract: A thermal emission structure capable of exhibiting heat release characteristics reverse to those of a Phase-change material used therein includes a first conductor layer, a dielectric layer on the first conductor layer, and a second conductor layer on the dielectric layer and having a periodic geometry, at least one of the first conductor layer and the second conductor layer comprises a Phase-change material having an electrical conduction property that varies between a high-temperature phase and a low-temperature phase.
    Type: Application
    Filed: May 17, 2018
    Publication date: November 22, 2018
    Inventors: Hiroshi Yoshimoto, Toshio Watari, Kota Ito, Hideo Iizuka
  • Patent number: 9971162
    Abstract: A cloaking device includes cloaking region boundary planes oriented non-planar to each other, each of the cloaking region boundary planes having an outward facing mirror surface and an inward facing opaque surface. The cloaking device includes a cloaking region bounded at least partially by the inward facing opaque surfaces of the cloaking region boundary planes. Half mirrors are spaced apart from and generally parallel to the outward facing mirror surfaces such that a half mirror is spaced apart from and generally parallel to each outward facing mirror surface. Light from an object on an object-side of the cloaking device is directed around an article within the cloaking region and forms an image on an image-side of the cloaking device such the article appears transparent to an observer looking towards the object.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: May 15, 2018
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Debasish Banerjee, Hideo Iizuka
  • Patent number: 9968016
    Abstract: A magnetic field shield having a plurality of tunable resonant loops arranged on a planar support medium. The resonant loops are loaded with a lumped component such as a capacitor or variable capacitor and produce magnetic null points. The location of the magnetic null points may be moved three dimensionally about the planar support medium.
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: May 8, 2018
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Debasish Banerjee, Hideo Iizuka
  • Patent number: 9791183
    Abstract: The first and second media are coupled via evanescent waves generated by surface phonon polaritons thermally excited on surfaces of the first and second media. First and second media made of the same material are disposed with a gap formed between for cutting off thermal conduction and the heat transfer between them is performed via the thermally excited evanescent waves. A third medium is provided on a surface of the first medium on a side toward the second medium. Heat flux flows from the second medium to the first medium in a first state wherein the second medium has a first temperature TH and the first medium has a second temperature TL lower than the TH differ in intensity from heat flux which flows from the first to the second medium in a second state wherein the first medium has the TH and the second medium has the TL.
    Type: Grant
    Filed: April 16, 2013
    Date of Patent: October 17, 2017
    Assignee: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Hideo Iizuka, Shanhui Fan
  • Publication number: 20170227781
    Abstract: A cloaking device includes cloaking region boundary planes oriented non-planar to each other, each of the cloaking region boundary planes having an outward facing mirror surface and an inward facing opaque surface. The cloaking device includes a cloaking region bounded at least partially by the inward facing opaque surfaces of the cloaking region boundary planes. Half mirrors are spaced apart and generally parallel to the outward facing mirror surfaces such that a half mirror is spaced apart and generally parallel to each outward facing mirror surface. Light from an object on an object-side of the cloaking device is directed around an article within the cloaking region and forms an image on an image-side of the cloaking device such the article appears transparent to an observer looking towards the object.
    Type: Application
    Filed: June 17, 2016
    Publication date: August 10, 2017
    Inventors: Debasish Banerjee, Hideo Iizuka
  • Patent number: 9701211
    Abstract: A resonant wireless energy transfer system comprises first and second antennas made up of dual parallel wire helixes wherein the wires are terminated by short wires. Voltage controlled variable capacitors are connected into the antennas to permit progressive variation between folded dipole and normal dipole operating modes such that optimum energy transfer can be achieved between the antennas over a wide range of antenna separation distances. A vehicle battery charging system using the above-described antennas is provided including an installation which allows purchase of battery charging power by members of the general public. In-vehicle energy transfer for sensors, computers, cell phones and the like is also described.
    Type: Grant
    Filed: July 16, 2014
    Date of Patent: July 11, 2017
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Hideo Iizuka, Jae Seung Lee, Paul Donald Schmalenberg, Brian Joseph Robert
  • Patent number: 9500785
    Abstract: A grating structure and a solar cell assembly. In one aspect, the grating structure suppresses the zero order transmission to near 0%. In another aspect, the solar cell assembly has improved absorption due to coupling with a grating structure.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: November 22, 2016
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., The Trustees of the University of Pennsylvania, Toyota Central Research and Development Laboratories, Inc.
    Inventors: Hideo Iizuka, Nader Engheta, Yasuhiko Takeda
  • Patent number: 9500784
    Abstract: Optical devices using double-groove diffraction gratings having periodic sets of TiO2 elements on one or more surfaces of an SiO2 substrate are disclosed. First order components of incident polarized light coupled into the substrate are reflected so as to propagate through the substrate to terminus points where they either change direction for further propagation or exit the substrate. A windshield display system using the principles of the invention is disclosed.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: November 22, 2016
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., The Trustees of the University of Pennsylvania
    Inventors: Hideo Iizuka, Nader Engheta
  • Patent number: 9285519
    Abstract: A double-sided grating divider acts as a light switch where the upper and lower grating dividers are arranged to accommodate a relative lateral shift therebetween of about one-fourth of the period of the diffraction grating elements and where the critical refraction angles of the grating dividers are more than about 43.6°. Lateral shift may be achieved by various devices including MEMS and metal couplers having a known/calibrated thermal coefficient of expansion over a temperature range of interest.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: March 15, 2016
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., The Trustess of the University of Pennsylvania
    Inventors: Hideo Iizuka, Nader Engheta
  • Publication number: 20160044837
    Abstract: A magnetic field shield having a plurality of tunable resonant loops arranged on a planar support medium The resonant loops are loaded with a lumped component such as a capacitor or variable capacitor and produce magnetic null points.
    Type: Application
    Filed: August 11, 2014
    Publication date: February 11, 2016
    Inventors: Debasish Banerjee, Hideo Iizuka
  • Patent number: 9136406
    Abstract: A solar cell structure using either a dye-sensitized or organic absorber is provided with a diffraction grating on at least one side to enhance the travel of first order diffraction components through the photo sensitive material. A two-sided cell uses diffraction gratings both top and bottom wherein the periodic diffraction elements of one grating are shifted by one-quarter of the grating period relative to the other.
    Type: Grant
    Filed: July 7, 2010
    Date of Patent: September 15, 2015
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Hideo Iizuka, Yasuhiko Takeda, Hisayoshi Fujikawa
  • Publication number: 20150090862
    Abstract: A lens reflecting a light of a predetermined wavelength, or transmitting and condensing or diverging the light is provided. The lens includes a substrate, and a quasi-periodic structure layer. A plane of the quasi-periodic structure layer is divided into unit cells and is filled with the unit cells in a two-dimensional period. The unit cell has a first region and a second region. An occupancy rate is changed as a distance from a center of the substrate. A resonance mode is defined by a relationship between the occupancy rate and the period length. A lowest order resonance mode is defined by the resonance mode. The period length is set to a predetermined value within a predetermined range including an optimum value. Another lens is provided. A minimum occupancy rate is defined by a smallest occupancy rate. A variation range of the occupancy rate changes across the minimum occupancy rate.
    Type: Application
    Filed: September 26, 2014
    Publication date: April 2, 2015
    Inventors: Takayuki MATSUI, Hisayoshi FUJIKAWA, Hideo IIZUKA, Hiroyuki WADO, Shuichi YAMASHITA
  • Publication number: 20150082810
    Abstract: The first and second media are coupled via evanescent waves generated by surface phonon polaritons thermally excited on surfaces of the first and second media. First and second media made of the same material are disposed with a gap formed between for cutting off thermal conduction and the heat transfer between them is performed via the thermally excited evanescent waves. A third medium is provided on a surface of the first medium on a side toward the second medium. Heat flux flows from the second medium to the first medium in a first state wherein the second medium has a first temperature TH and the first medium has a second temperature TL lower than the TH differ in intensity from heat flux which flows from the first to the second medium in a second state wherein the first medium has the TH and the second medium has the TL.
    Type: Application
    Filed: April 16, 2013
    Publication date: March 26, 2015
    Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Hideo Iizuka, Shanhui Fan
  • Patent number: 8976450
    Abstract: A light switch (or valve) made up of two mutually inverted, substantially identical diffraction gratings with a liquid medium therebetween, arranged to allow the grating substrates to be shifted laterally relative to one another so as to align and mis-align the grating elements. When aligned, incident-polarized light passes through the switch and when misaligned, light does not pass through the switch but is reflected.
    Type: Grant
    Filed: April 4, 2011
    Date of Patent: March 10, 2015
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., The Trustees of the University of Pennsylvania
    Inventors: Hideo Iizuka, Nader Engheta, Hisayoshi Fujikawa
  • Publication number: 20140327301
    Abstract: A resonant wireless energy transfer system comprises first and second antennas made up of dual parallel wire helixes wherein the wires are terminated by short wires. Voltage controlled variable capacitors are connected into the antennas to permit progressive variation between folded dipole and normal dipole operating modes such that optimum energy transfer can be achieved between the antennas over a wide range of antenna separation distances. A vehicle battery charging system using the above-described antennas is provided including an installation which allows purchase of battery charging power by members of the general public. In-vehicle energy transfer for sensors, computers, cell phones and the like is also described.
    Type: Application
    Filed: July 16, 2014
    Publication date: November 6, 2014
    Inventors: HIDEO IIZUKA, JAE SEUNG LEE, PAUL DONALD SCHMALENBERG, BRIAN JOSEPH ROBERT
  • Patent number: 8803484
    Abstract: A resonant wireless energy transfer system comprises first and second antennas made up of dual parallel wire helixes wherein the wires are terminated by short wires. Voltage controlled variable capacitors are connected into the antennas to permit progressive variation between folded dipole and normal dipole operating modes such that optimum energy transfer can be achieved between the antennas over a wide range of antenna separation distances. A vehicle battery charging system using the above-described antennas is provided including an installation which allows purchase of battery charging power by members of the general public. In-vehicle energy transfer for sensors, computers, cell phones and the like is also described.
    Type: Grant
    Filed: June 4, 2013
    Date of Patent: August 12, 2014
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Hideo Iizuka, Jae Seung Lee, Paul Donald Schmalenberg, Brian Joseph Robert
  • Patent number: 8797702
    Abstract: An example apparatus for obtaining a desired magnetic field distribution from an incident magnetic field, such as a kHz magnetic field, comprises a structure receiving the incident magnetic field and generating the desired magnetic field distribution at a predetermined distance from the transmitting side of the apparatus. The desired magnetic field distribution results from a spatial distribution of induced electrical current over the structure. Examples of the invention also include design methods and methods of using the apparatus.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: August 5, 2014
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Debasish Banerjee, Hideo Iizuka, Jaewook Lee, Ercan Mehmet Dede