Patents Assigned to Nichias Corporation
  • Publication number: 20200041085
    Abstract: A light emitting device includes: a substrate; a plurality of light emitting elements mounted on the substrate; a plurality of wavelength conversion members, each containing phosphor particles and being disposed on a respective one of the light emitting elements; and a plurality of light reflecting members disposed between adjacent ones of the wavelength conversion members to reflect light emitted from the light emitting elements. The wavelength conversion members and the light reflecting members are included in a collective body that has a curved upper surface having a concave shape.
    Type: Application
    Filed: August 5, 2019
    Publication date: February 6, 2020
    Applicant: NICHIA CORPORATION
    Inventors: Hiroshi MIYAIRI, Shinya ENDO
  • Publication number: 20200043405
    Abstract: An image display device includes pixel circuits arranged in a matrix configuration between a first power supply line and a second power supply line. Each of the pixel circuits includes a light-emitting element and a first circuit connected to the light-emitting element and configured to set a duration during which a current is supplied to the light-emitting element based on a result of comparing a first signal and a first direct current voltage. The first signal includes a triangular wave signal. The first direct current voltage is set in a prescribed period. At least one of the pixel circuits includes a second circuit connected in series to the first circuit. The second circuit is configured to control a current supplied to the first circuit based on a second direct current voltage set in a period different from the prescribed period.
    Type: Application
    Filed: July 30, 2019
    Publication date: February 6, 2020
    Applicant: NICHIA CORPORATION
    Inventor: Hajime AKIMOTO
  • Publication number: 20200044129
    Abstract: Provided is a method for producing a light emitting device, including the steps of providing an intermediate body including a precursor substrate including a base member that includes a top surface and a first bottom surface, a pair of first wiring portions on the top surface, and a pair of second wiring portions electrically connected with the pair of first wiring portions respectively and positioned between the top surface and the first bottom surface; and a light emitting element on the first wiring portions; removing a part of the base member off the first bottom surface of the base member to thin the base member so that a second bottom surface of the base member is formed; and forming a pair of external electrodes, to be electrically connected with the pair of second wiring portions respectively, on the second bottom surface.
    Type: Application
    Filed: July 31, 2019
    Publication date: February 6, 2020
    Applicant: NICHIA CORPORATION
    Inventor: Toru HASHIMOTO
  • Publication number: 20200043903
    Abstract: A light-emitting module includes a light-emitting element unit including a light-emitting element, a light-transmissive member covering a main light-emitting surface of the light-emitting element, and a first light-reflective member covering lateral surfaces of the light-emitting element; a light-transmissive light-guiding plate having a first main surface and a second main surface having a recess accommodating the light-emitting element unit; a second light-reflective member covering the second main surface and the light-emitting element unit; and a light-transmissive bonding member disposed in contact with inner lateral surfaces of the recess and outer lateral surfaces of the light-emitting element unit. At least a portion of the first light-reflective member is located outside the recess in a cross-sectional view, and is in contact with the light-transmissive bonding member.
    Type: Application
    Filed: August 1, 2019
    Publication date: February 6, 2020
    Applicant: NICHIA CORPORATION
    Inventors: Daisuke KASAI, Tadao HAYASHI, Toru HASHIMOTO
  • Publication number: 20200044121
    Abstract: A light emitting module includes: a plurality of light emitting elements each having a primary light emitting surface and a lateral surface; a plurality of wavelength conversion members arranged respectively on the primary light emitting surfaces of the plurality of light emitting elements; and a lightguide plate having a first primary surface and a second primary surface and arranged continuously on the plurality of wavelength conversion members so that the second primary surface faces the plurality of wavelength conversion members, wherein the lightguide plate includes a plurality of recessed portions located on the second primary surface, and a lateral surface of at least one of the plurality of wavelength conversion members is partially in contact with an inner lateral surface of at least one of the plurality of recessed portions.
    Type: Application
    Filed: August 1, 2019
    Publication date: February 6, 2020
    Applicant: NICHIA CORPORATION
    Inventors: Mamoru IMADA, Toshiaki MORIWAKI, Yusaku ACHI, Ryohei YAMASHITA
  • Publication number: 20200041845
    Abstract: A light emitting device according to the present invention includes a flexible wiring board that electrically connects light emitting modules to each other. The light emitting modules include anode-side and cathode-side terminals that are arranged on their back surface and are connected to light emitting elements, which are included in their light emitting module and connected to each other in series or in parallel, in order to supply currents to light emitting elements. The wiring board has a comb shape that includes a number of comb-tooth portions extending in row or column direction of the matrix arrangement of the light emitting modules. The comb-tooth portions include an electrically-conductive pattern. The anode-side and cathode-side terminals of light emitting modules are connected to the electrically-conductive pattern of the comb-tooth portions of the wiring board.
    Type: Application
    Filed: August 2, 2019
    Publication date: February 6, 2020
    Applicant: NICHIA CORPORATION
    Inventors: Satoshi YOSHINAGA, Kana SAKAMOTO
  • Patent number: 10550324
    Abstract: Disclosed are a production method for a nitride fluorescent material, a nitride fluorescent material and a light emitting device. The production method is for producing a nitride fluorescent material that has, as a fluorescent material core, a calcined body having a composition containing at least one element Ma selected from the group consisting of Sr, Ca, Ba and Mg, at least one element Mb selected from the group consisting of Li, Na and K, at least one element Mc selected from the group consisting of Eu, Ce, Tb and Mn, and Al, and optionally Si, and N, and the method includes preparing a calcined body having the above-mentioned composition, bringing the calcined body into contact with a fluorine-containing substance, and subjecting it to a first heat treatment at a temperature of 100° C. or higher and 500° C.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: February 4, 2020
    Assignee: NICHIA CORPORATION
    Inventors: Sadakazu Wakui, Kazuya Nishimata, Shoji Hosokawa
  • Patent number: 10553768
    Abstract: A light-emitting device includes: a light-emitting element which includes an upper surface and a first lateral surface; a light-transmitting member disposed above the light-emitting element, the light-transmitting member having a substantially rectangular shape with a pair of first sides and a pair of second sides; a wavelength conversion member having a plurality of lateral surfaces; and a reflecting member. The light-transmitting member has a pair of second lateral surfaces each including a corresponding one of the first sides, and a pair of third lateral surfaces each including a corresponding one of the second sides. The reflecting member covers the first lateral surface, an entirety of the plurality of lateral surfaces of the wavelength conversion member, and an entirety of the pair of second lateral surfaces of the light-transmitting member. Each of the pair of third lateral surfaces of the light-transmitting member is partially exposed out of the reflecting member.
    Type: Grant
    Filed: April 10, 2019
    Date of Patent: February 4, 2020
    Assignee: NICHIA CORPORATION
    Inventor: Yoshiki Sato
  • Patent number: 10553763
    Abstract: A light emitting device includes a base including a support having a support surface. A light emitting element includes a semiconductor layer and a sapphire substrate provided on the semiconductor layer opposite to the support surface. A light-transmissive covering member is provided on the sapphire substrate to sandwich the sapphire substrate between the semiconductor layer and the reflecting film. A light emitted from the semiconductor layer is configured to be extracted from the sapphire substrate between the semiconductor layer and the reflecting film. A height of the light-transmissive covering member viewed in a direction in which a width of the light-transmissive covering member appears smallest is 0.5 times or less of the width of the light-transmissive covering member.
    Type: Grant
    Filed: August 24, 2018
    Date of Patent: February 4, 2020
    Assignee: NICHIA CORPORATION
    Inventors: Yuichi Yamada, Motokazu Yamada
  • Patent number: 10553770
    Abstract: A light emitting device includes a light emitting element and a mounting substrate on which the light emitting element is mounted such that the mounting substrate faces an upper side of the light emitting element. The light emitting element includes a substrate, first and second light emitting cells each including a semiconductor layered structure that includes an n-side semiconductor layer and a p-side semiconductor layer in order from a substrate side, a first insulating layer, wiring electrodes, and a second insulating layer. One of the wiring electrodes is electrically connected to the n-side semiconductor layer of the first light emitting cell and to the p-side semiconductor layer of the second light emitting cell. The mounting substrate includes wiring terminals, one of which is electrically connected to the n-side semiconductor layer of the first light emitting cell and to the p-side semiconductor layer of the second light emitting cell.
    Type: Grant
    Filed: April 4, 2018
    Date of Patent: February 4, 2020
    Assignee: NICHIA CORPORATION
    Inventor: Keiji Emura
  • Patent number: 10551006
    Abstract: A light emitting device includes light emitting elements mounted on a first surface of a board, and a common-lead region disposed on the first surface of the board between the first light emitting element and the second light emitting element. A wavelength conversion member covers the light emitting elements and the common-lead region. The wavelength conversion member has a first end and a second end. A first metal plate protrudes at the first end of the wavelength conversion member. A second metal plate protrudes at the second end of the wavelength conversion member. The first light emitting element is connected to the common-lead region via the first wire and is electrically connected to the first metal plate via the second wire. The second light emitting element is connected to the common-lead region via the third wire and is electrically connected to the second metal plate via the fourth wire.
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: February 4, 2020
    Assignee: NICHIA CORPORATION
    Inventors: Yuichiro Tanda, Toshio Matsushita
  • Patent number: 10553568
    Abstract: A light emitting device of a side-surface light emission type includes a package defining a recess and having a shape elongated in a lateral direction, the package including a pair of lead electrodes arranged next to each other in the lateral direction and forming main portions of a bottom of the recess, and a molded body integrally formed with the pair of lead electrodes and defining sidewalls of the recess, and a light emitting element disposed on at least one of the pair of lead electrodes at the bottom of the recess. The molded body has a reinforcing portion connecting between two sidewalls of the recess opposite to each other in a longitudinal direction. The reinforcing portion is made of two end portions respectively connected to the two sidewalls, and an intermediate portion provided between the two end portions.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: February 4, 2020
    Assignee: NICHIA CORPORATION
    Inventor: Tetsuya Ishikawa
  • Patent number: 10553765
    Abstract: A method for manufacturing a light emitting device includes: providing a substrate; placing a light emitting element on a top surface of the substrate; arranging on the top surface of the substrate a translucent frame body that is spaced apart from the light emitting element and that surrounds the light emitting element so that a top surface of the translucent frame body is at a position higher than a top surface of the light emitting element; arranging a wavelength conversion member in a region surrounded by the translucent frame body so as to cover the top surface and a side surface of the light emitting element and to be in contact with an inside surface of the frame body; and forming a translucent member that covers the substrate, the translucent frame body, and the wavelength conversion member.
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: February 4, 2020
    Assignee: NICHIA CORPORATION
    Inventors: Toru Hashimoto, Takahiro Amo
  • Publication number: 20200036158
    Abstract: A light source device includes at least one first wiring, a plurality of second wirings, a plurality of light emitting elements each having a lower-surface-side electrode connected to a respective one of the at least one first wiring, a plurality of protective elements each having a lower-surface-side electrode connected to a respective one of the plurality of second wirings each corresponding to a respective one of the plurality of light emitting elements, each of the plurality of protective elements connected to a respective one of the plurality of light emitting elements, a plurality of first wirings each connecting an upper-surface-side electrode of each of the plurality of light emitting elements and a respective one of the plurality of second wirings, a plurality of second wires each connecting the upper-surface-side electrodes of two adjacent ones of the protective elements; and a plurality of third wires each connecting an upper-surface-side electrode of a respective one of the plurality of protective
    Type: Application
    Filed: July 29, 2019
    Publication date: January 30, 2020
    Applicant: Nichia Corporation
    Inventors: Tadaaki MIYATA, Hideaki TAKEDA
  • Publication number: 20200035860
    Abstract: A light emitting element includes: a first conductivity type semiconductor rod having a plurality of side surfaces arranged to form a polygonal column shape; an active layer formed of a semiconductor and covering the side surfaces; and a second conductive type semiconductor layer covering the active layer. The active layer includes a plurality of well layers respectively disposed over at least two adjacent side surfaces among the plurality of side surfaces. Adjacent well layers among the plurality of well layers are separated from each other along a ridge line where the at least two adjacent side surfaces are in contact with each other. The active layer further includes a ridge portion formed of a semiconductor and disposed on the ridge line, the ridge portion connecting the adjacent well layers. A bandgap of the ridge portion is wider than a bandgap of each of the plurality of well layers.
    Type: Application
    Filed: September 27, 2017
    Publication date: January 30, 2020
    Applicant: NICHIA CORPORATION
    Inventor: Atsuo MICHIUE
  • Publication number: 20200035874
    Abstract: A light-emitting device has a longitudinal direction and a width direction perpendicular to the longitudinal direction, and includes a first light-emitting element, a second light-emitting element having a peak emission wavelength different from a peak emission wavelength of the first light-emitting element and being aligned with the first light-emitting element in the longitudinal direction, a light-transmissive member covering a first element light extracting surface and a second element light extracting surface such that a portion of a light-guide member is located between the light-transmissive member and each of the first element light extracting surface and the second element light extracting surface, a first reflective member surrounding the first light-emitting element, the second light-emitting element, and the light-guide member in a top view, and a first inclined member between the first light-emitting element and the first reflective member in the longitudinal direction and having an inclined surf
    Type: Application
    Filed: July 23, 2019
    Publication date: January 30, 2020
    Applicant: NICHIA CORPORATION
    Inventors: Takuya NAKABAYASHI, Yukiko YOKOTE, Tadaaki IKEDA
  • Patent number: 10546982
    Abstract: A light emitting device includes: a light emitting element, a wavelength conversion member disposed on an upper face of the light emitting element and having a lower face that has a larger area than the upper face of the light emitting element, a first light guide member extending from a lateral face of the light emitting element to the lower face of the wavelength conversion member, a light transmissive member disposed on an upper face of the wavelength conversion member and having a lower face that has a smaller area than the upper face of the wavelength conversion member, and a second light guide member extending from the upper face of the wavelength conversion member to a lateral face of the light transmissive member.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: January 28, 2020
    Assignee: NICHIA CORPORATION
    Inventor: Kenji Ozeki
  • Patent number: 10544931
    Abstract: A wavelength conversion member includes a light-reflecting member and a phosphor-containing layer. The light-reflecting member is configured to reflect laser light. The phosphor-containing layer includes a base component provided on the light-reflecting member and one or more projecting portions protruding from the base component toward a direction away from the light-reflecting member. Each of the one or more projecting portions is configured to be irradiated with laser light. Each of the one or more projecting portions is smaller than the base component and larger than a spot of the laser light to be irradiated.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: January 28, 2020
    Assignee: NICHIA CORPORATION
    Inventor: Toshiaki Yamashita
  • Patent number: 10546981
    Abstract: A light emitting device includes: a light emitting element emitting first light; a fluorescent material layer disposed on the light emitting element and excited by the first light to emit second light being longer in wavelength than the first light; a reflective film disposed on the fluorescent material layer to reflect the first light and transmit the second light; a light-transmissive member disposed on the reflective film; and an absorbing layer disposed on the light-transmissive member to absorb the first light.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: January 28, 2020
    Assignee: NICHIA CORPORATION
    Inventor: Taiki Yuasa
  • Patent number: 10544864
    Abstract: A gasket including a sheet part that includes exfoliated clay minerals, wherein the exfoliated clay minerals are irregularly dispersed in the sheet part without being oriented.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: January 28, 2020
    Assignee: NICHIAS CORPORATION
    Inventors: Hirotaka Natori, Tomokazu Watanabe, Nahoko Kitajima