Patents by Inventor Ken Shimizu

Ken Shimizu 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: 11400817
    Abstract: A controller of an embodiment includes a limiter receiving an active current command initial value, limiting a maximum value of the active current command initial value with a predetermined value, and outputting a first value; a circuit to calculate a reactive current command initial value; a calculator to calculate a reactive current command adjustment value; a unit receiving the first value as an input, and calculating a reactive current upper limit value such that a composite value of the first value and the reactive current upper limit value is equal to or smaller than an input current maximum value; and a limiter to output the reactive current command adjustment value or the reactive current upper limit value, whichever is smaller. The predetermined value is a value to set the reactive current upper limit value to a value larger than zero and smaller than the input current maximum value.
    Type: Grant
    Filed: January 27, 2020
    Date of Patent: August 2, 2022
    Assignees: Central Japan Railway Company, Toshiba Infrastructure Systems & Solutions Corporation
    Inventors: Ken Kunomura, Toshimasa Shimizu, Kenji Sato, Hirokazu Kato, Kazuaki Yuuki, Toshiyuki Uchida, Masatsugu Morita, Hiroki Miyajima, Yukitaka Monden
  • Patent number: 11381192
    Abstract: Provided is a power conversion controller in which variation in reactive power among power conversion controllers can be inhibited while maintaining the running performance of vehicles. The power conversion controller includes a power factor setter that sets a power factor based on a detection value of an overhead line voltage, and a calculator that calculates a reactive current command value by multiplying an active current command value by a tangent of a power factor angle of the power factor. The power factor setter sets a reference value set in advance as the power factor if the detection value is within a reference range, sets a value smaller than the reference value as the power factor if the detection value is below the reference range, and sets a value larger than the reference value as the power factor if the detection value is beyond the reference range.
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: July 5, 2022
    Assignee: CENTRAL JAPAN RAILWAY COMPANY
    Inventors: Ken Kunomura, Toshimasa Shimizu, Kenji Sato, Toshiaki Takami
  • Publication number: 20220205675
    Abstract: An air conditioner of an embodiment includes a plurality of outdoor units, one or more indoor units, and a control unit. The outdoor unit includes a compressor, a four-way valve, an outdoor heat exchanger, an outdoor expansion valve and an outdoor blower, and the outdoor units exchange heat between the outside air and a refrigerant. The indoor unit is an indoor unit connected to the plurality of outdoor units by a refrigerant pipe, includes an indoor heat exchanger, an indoor expansion valve, and an indoor blower, and exchanges heat between the indoor air and the refrigerant. The control unit controls the plurality of outdoor units and the one or more indoor units. The control unit controls the condensation pressure of the outdoor unit in a heating operation or the suction pressure of the outdoor unit in a defrosting operation to be equal to or smaller than an upper limit pressure, which is 1/1.
    Type: Application
    Filed: March 15, 2022
    Publication date: June 30, 2022
    Applicant: Toshiba Carrier Corporation
    Inventors: Ken MIURA, Tetsuma HAMASHIMA, Katsuhiro SHIMIZU
  • Publication number: 20220205671
    Abstract: According to one embodiment, an air conditioner carries out a heating operation, a cooling operation, a cooling/heating mixed operation in which a higher priority is given to cooling, and a cooling/heating mixed operation in which a higher priority is given to heating.
    Type: Application
    Filed: March 17, 2022
    Publication date: June 30, 2022
    Inventors: Tetsuma Hamashima, Yukio Kiguchi, Shun Asari, Shohei Arita, Ken Miura, Tomoki Shimizu
  • Publication number: 20220181526
    Abstract: A first conversion layer material is formed on unmasked pixel areas of a substrate. Mask material is selectively removed from a second set of pixel areas, leaving a third set of pixel areas masked. A coating is formed on sidewalls of the second pixel areas, and then a second conversion layer material is formed on the second pixel areas and against their sidewalls. Mask material is removed from the third pixel areas, a coating is formed on sidewalls of the third pixel areas, and a third conversion layer material is formed on the third pixel areas and against their sidewalls. The resulting wavelength-conversion layer includes contiguously arranged regions of the first, second, and third conversion layer materials, at least two of which are wavelength-converting phosphor materials. The sidewall coatings between the regions act as barriers to lateral light transmission.
    Type: Application
    Filed: December 6, 2021
    Publication date: June 9, 2022
    Applicant: LUMILEDS LLC
    Inventors: Marcel Rene BOHMER, Ken SHIMIZU
  • Publication number: 20220173284
    Abstract: A laterally heterogenous wavelength-converting optical element includes pixel regions surrounded by border regions; each includes down-converting phosphor particles bound by a coating or solid medium. The pixel regions are aligned with LEDs of an array. The phosphor regions differ with respect to one or more of compositions, particle sizes, coating thicknesses, refractive indices, or voids (size, number density, or volume fraction). Those difference(s) can result in the border regions exhibiting larger optical scattering, which can improve contrast of down-converted light emitted by adjacent pixels of the array.
    Type: Application
    Filed: November 30, 2021
    Publication date: June 2, 2022
    Applicant: LUMILEDS LLC
    Inventors: Marcel Rene BOHMER, Toni LOPEZ, Ken SHIMIZU
  • Publication number: 20220097513
    Abstract: A vehicle drive device that includes a rotary electric machine that serves as a driving force source for wheels; a first rotation member coupled to a rotor of the rotary electric machine; and a fluid coupling that is disposed on an axial first side, which is one side in an axial direction with respect to the rotary electric machine, and that has a rotation housing.
    Type: Application
    Filed: March 27, 2020
    Publication date: March 31, 2022
    Applicants: AISIN CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroshi OTA, Ken SHIMIZU, Ren OKAZAWA, Masashi IKEMURA, Guo Dong TAN, Takao OKI
  • Publication number: 20220059736
    Abstract: A method of fabricating closely spaced pcLEDs (100) arranged in a matrix array (200) of perpendicular rows and columns comprises an initial phosphor deposition step in which phosphor (803, 905) is deposited at alternating locations (pixels) in the matrix array in a checkerboard pattern, so that the locations (504) in the array at which phosphor (803, 905) is deposited are not adjacent to each other. In a subsequent phosphor deposition step phosphor is deposited at the alternating locations at which phosphor was not deposited in the first deposition step.
    Type: Application
    Filed: December 17, 2019
    Publication date: February 24, 2022
    Applicant: Lumileds LLC
    Inventors: Marcel Rene BOHMER, Jacques Heuts, Ken SHIMIZU, Peter Josef SCHMIDT
  • Patent number: 11127887
    Abstract: A semiconductor light emitting device (100;200;300;400,400B,400C;500;600;700) may have a reflective side coating (120;220;320;420;520;620;720) disposed on a sidewall (118;215;315;415,435;515) of a semiconductor light emitting device structure. Such a device may be fabricated by dicing a semiconductor structure to separate a semiconductor light emitting device structure and then forming a reflective side coating (120;220;320;420;520;620;720) on a sidewall (118;215;315;415,435;515) of the separated semiconductor light emitting device structure.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: September 21, 2021
    Assignee: Lumileds LLC
    Inventors: Hisashi Masui, Oleg B. Shchekin, Ken Shimizu, Lex Kosowsky, Ken Davis
  • Publication number: 20210239329
    Abstract: A ceiling-embedded air conditioner includes, a casing, a motor including an output shaft protruding downward, the output shaft being driven to rotate about an axis, a main plate fixed to the output shaft and extending radially outward, a turbofan including an impeller, a heat exchanger passed through by air that is sent from the turbofan. And the main plate includes, a tapered portion, a recess formed to be recessed radially inward from the tapered portion, the recess being defined by a cylindrical plate portion extending along the axis, and a disk plate portion extending radially outward from the upper end of the cylindrical plate portion. And an opening is formed in the cylindrical plate portion, the opening penetrates the cylindrical plate portion in the radial direction, and configured such that a circulation flow that exits from the impeller and flows around above the main plate passes through the opening.
    Type: Application
    Filed: January 21, 2021
    Publication date: August 5, 2021
    Inventors: Chihiro MYOREN, Takanori SHIBATA, Ken SHIMIZU
  • Publication number: 20210151500
    Abstract: Pixelated array light emitters are formed with closely-spaced pixels having ultra-smooth sidewalk. In methods for making such pixelated array light emitters, a converter layer of phosphor particles dispersed in a binder is disposed on a carrier, and then singulated by saw cuts or similar methods to form an array of phosphor pixels. The binder is fully cured prior to singulation of the converter layer. Further, the carrier is rigid rather than flexible. As a consequence of fully curing the binder and of using a rigid carrier to support the converter layer, singulation results in phosphor pixels having smooth side walls. The array of phosphor pixels is subsequently attached to a corresponding array of LEDs with an adhesive layer, separate from the binder used to form the converter layer. The pixel sidewalls may be formed with controlled morphology, for example at acute or obtuse angles with respect to the carrier.
    Type: Application
    Filed: January 25, 2021
    Publication date: May 20, 2021
    Applicant: LUMILEDS LLC
    Inventors: Hisashi MASUI, Ken SHIMIZU, Emma DOHNER
  • Patent number: 10930825
    Abstract: A method of fabricating closely spaced pcLEDs arranged in a matrix array of perpendicular rows and columns comprises an initial phosphor deposition step in which phosphor is deposited at alternating locations (pixels) in the matrix array in a checkerboard pattern, so that the locations in the array at which phosphor is deposited are not adjacent to each other. In a subsequent phosphor deposition step phosphor is deposited at the alternating locations at which phosphor was not deposited in the first deposition step. In between the two phosphor deposition steps, reflective or scattering structures may be fabricated on sidewalls of the phosphor pixels to optically isolate pcLEDs in the resulting array from each other.
    Type: Grant
    Filed: December 26, 2018
    Date of Patent: February 23, 2021
    Assignee: Lumileds LLC
    Inventors: Marcel Rene Bohmer, Jacques Heuts, Ken Shimizu, Peter Schmidt
  • Patent number: 10910433
    Abstract: The pcLED pixels in a phosphor-converted LED array each comprise an optical element on the light-emitting surface above the phosphor layer. In methods for making such pixelated LED arrays, a thin layer of a sacrificial phosphor carrier substrate is retained as the optical element on the output surface of the phosphor pixels upon completion of the fabrication process.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: February 2, 2021
    Assignee: Lumileds LLC
    Inventors: Hisashi Masui, Ken Shimizu, Emma Dohner
  • Patent number: 10903266
    Abstract: Pixelated array light emitters are formed with closely-spaced pixels having ultra-smooth sidewalls. In methods for making such pixelated array light emitters, a converter layer of phosphor particles dispersed in a binder is disposed on a carrier, and then singulated by saw cuts or similar methods to form an array of phosphor pixels. The binder is fully cured prior to singulation of the converter layer. Further, the carrier is rigid rather than flexible. As a consequence of fully curing the binder and of using a rigid carrier to support the converter layer, singulation results in phosphor pixels having smooth side walls. The array of phosphor pixels is subsequently attached to a corresponding array of LEDs with an adhesive layer, separate from the binder used to form the converter layer. The pixel sidewalls may be formed with controlled morphology, for example at acute or obtuse angles with respect to the carrier.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: January 26, 2021
    Assignee: Lumileds LLC
    Inventors: Hisashi Masui, Ken Shimizu, Emma Dohner
  • Publication number: 20210013380
    Abstract: Systems for apparatuses formed of light emitting devices. Solutions for controlling the off-state appearance of lighting system designs is disclosed. Thermochromic materials are selected in accordance with a desired off-state of an LED device. The thermochromic materials are applied to a structure that is in a light path of light emitted by the LED device. In the off-state the LED device produces a desired off-state colored appearance. When the LED device is in the on-state, the thermochromic materials heat up and become more and more transparent. The light emitted from the device in its on-state does not suffer from color shifting due to the presence of the thermochromic materials. Furthermore, light emitted from the LED device in its on-state does not suffer from attenuation due to the presence of the thermochromic materials. Techniques to select and position thermochromic materials in or around LED apparatuses are presented.
    Type: Application
    Filed: September 22, 2020
    Publication date: January 14, 2021
    Applicant: LUMILEDS LLC
    Inventors: Hisashi MASUI, Okeg SHCHEKIN, Ken SHIMIZU, Marcel BOHMER, Frank JIN, Jyoti BHARDWAJ
  • Patent number: 10886703
    Abstract: A distributed Bragg reflector (DBR) structure on a substrate includes a high refractive index layer comprising titanium oxide (TiO2) and a low refractive index layer having a high carbon region and at least one low carbon region that contacts the high refractive index layer. Multiple layers of the high refractive index layer and the low refractive index layer are stacked. Typically, the multiple layers of the high refractive index layer and the low refractive index layer are stacked to a thickness of less than 10 microns. Each of the respective layers of the high refractive index layer and the low refractive index layer have a thickness of less than 0.2 microns.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: January 5, 2021
    Assignee: Lumileds LLC
    Inventors: Ken Shimizu, Hisashi Masui, Ted Wangensteen
  • Publication number: 20200412098
    Abstract: A distributed Bragg reflector (DBR) structure on a substrate includes a high refractive index layer comprising titanium oxide (TiO2) and a low refractive index layer having a high carbon region and at least one low carbon region that contacts the high refractive index layer. Multiple layers of the high refractive index layer and the low refractive index layer are stacked. Typically, the multiple layers of the high refractive index layer and the low refractive index layer are stacked to a thickness of less than 10 microns. Each of the respective layers of the high refractive index layer and the low refractive index layer have a thickness of less than 0.2 microns.
    Type: Application
    Filed: July 31, 2020
    Publication date: December 31, 2020
    Applicant: Lumileds LLC
    Inventors: Ken SHIMIZU, Hisashi MASUI, Ted WANGENSTEEN
  • Publication number: 20200412097
    Abstract: A distributed Bragg reflector (DBR) structure on a substrate includes a high refractive index layer comprising titanium oxide (TiO2) and a low refractive index layer having a high carbon region and at least one low carbon region that contacts the high refractive index layer. Multiple layers of the high refractive index layer and the low refractive index layer are stacked. Typically, the multiple layers of the high refractive index layer and the low refractive index layer are stacked to a thickness of less than 10 microns. Each of the respective layers of the high refractive index layer and the low refractive index layer have a thickness of less than 0.2 microns.
    Type: Application
    Filed: June 27, 2019
    Publication date: December 31, 2020
    Applicant: Lumileds LLC
    Inventors: Ken SHIMIZU, Hisashi MASUI, Ted WANGENSTEEN
  • Publication number: 20200411728
    Abstract: A light emitting package and method of making the package are described. The package contains an LED bonded to a light converting layer using an adhesive. The adhesive is jet printed, mask sprayed or extruded onto one of the surfaces before bonding. The adhesive has materials in different sections that differ in refractive index, oxygen permeability, and/or heat conductivity. The materials are formed in concentric rings around the adhesive center, islands or lines and are disposed to provide optical lensing or increasing permeability/heat conductivity with decreasing distance from the center. A substantially-reflective optical side coat surrounds the LED, adhesive layer and connecting structure.
    Type: Application
    Filed: June 28, 2019
    Publication date: December 31, 2020
    Inventors: Vernon Wong, Ken Shimizu, Daniel B. Roitman
  • Patent number: 10862007
    Abstract: A light emitting package and method of making the package are described. The package contains an LED bonded to a light converting layer using an adhesive. The adhesive is jet printed, mask sprayed or extruded onto one of the surfaces before bonding. The adhesive has materials in different sections that differ in refractive index, oxygen permeability, and/or heat conductivity. The materials are formed in concentric rings around the adhesive center, islands or lines and are disposed to provide optical lensing or increasing permeability/heat conductivity with decreasing distance from the center. A substantially-reflective optical side coat surrounds the LED, adhesive layer and connecting structure.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: December 8, 2020
    Assignee: Lumileds LLC
    Inventors: Vernon Wong, Ken Shimizu, Daniel B. Roitman