Patents by Inventor Tadaaki Ikeda

Tadaaki Ikeda 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: 11495587
    Abstract: A light emitting device includes a substrate including first, second, third and fourth wiring portions on a top surface of a base member and arrayed in a first direction, and a connection wiring portion connecting the second and third wiring portions. The connection wiring portion includes first and second connection ends respectively connected with the second and third wiring portions, and a connection central portion connecting the first and second connection ends and having a maximum width in a second direction different from each of a maximum width of the first connection end and a maximum width of the second connection end. In the second direction, at least a part of the connection wiring portion has a width narrower than each of a maximum width of the second wiring portion and a maximum width of the third wiring portion.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: November 8, 2022
    Assignee: NICHIA CORPORATION
    Inventors: Takuya Nakabayashi, Tadaaki Ikeda, Tetsuya Ishikawa
  • Publication number: 20220271204
    Abstract: A light emitting device includes: a mounting substrate comprising a mounting substrate first surface; a first light emitting element configured to emit light having a first peak wavelength; a second light emitting element configured to emit light having a second peak wavelength longer than the first peak wavelength; a first light-transmissive member; and a first wavelength converting member located on the first light-transmissive member.
    Type: Application
    Filed: May 13, 2022
    Publication date: August 25, 2022
    Applicant: Nichia Corporation
    Inventors: Tadaaki IKEDA, Yukiko YOKOTE
  • Patent number: 11362241
    Abstract: A light emitting device includes a first light emitting element, a second light emitting element, a first light-transmissive member, and a first wavelength converting member. The first light emitting element has a first light emitting element first surface at which a first n-side electrode and a first p-side electrode are disposed, and a first light emitting element second surface. The second light emitting element has a second light emitting element first surface at which a second n-side electrode and a second p-side electrode are disposed, and a second light emitting element second surface. The first light-transmissive member covers the first light emitting element fourth surface of the first light emitting element and a second light emitting element fourth surface of the second light emitting element. The first wavelength converting member is disposed on the first light-transmissive member.
    Type: Grant
    Filed: September 23, 2020
    Date of Patent: June 14, 2022
    Assignee: NICHIA CORPORATION
    Inventors: Tadaaki Ikeda, Yukiko Yokote
  • Patent number: 11201266
    Abstract: A light-emitting device includes a substrate including a base member having an upper surface having a substantially rectangular shape, a lower surface opposite to the upper surface, a first longer lateral surface, a second longer lateral surface opposite to the first longer lateral surface, a first shorter lateral surface, and a second shorter lateral surface opposite to the first shorter lateral surface, first wirings disposed on the upper surface, and second wirings disposed on the lower surface and each electrically connected with a respective one of the first wirings; at least one light-emitting element; and a light-reflective covering member covering lateral surfaces of the light-emitting element and the upper surface of the base member. The base member has at least one first recess open at the upper surface and the first longer lateral surface. Surfaces defining the at least one first recess are covered with the covering member.
    Type: Grant
    Filed: May 26, 2020
    Date of Patent: December 14, 2021
    Assignee: NICHIA CORPORATION
    Inventors: Takuya Nakabayashi, Tadaaki Ikeda
  • Patent number: 11201258
    Abstract: A method for manufacturing a light emitting device includes: providing an intermediate structure including first and second layered structures arranged in a first direction in a light reflecting member, wherein each of the layered structures includes a first and second electrodes arranged in a second direction, and wherein the intermediate structure has a first surface at which the first and second electrodes are exposed; on the first surface, forming a first hole in the light reflecting member between the first electrodes as viewed in the second direction; on the first surface, forming a second hole in the light reflecting member between the second electrodes as viewed in the second direction; forming a conductive film on exposed surfaces of the first and second electrodes, and in the first and second holes; and severing the light reflecting member and the conductive film at positions that pass through the first and second holes.
    Type: Grant
    Filed: November 14, 2019
    Date of Patent: December 14, 2021
    Assignee: NICHIA CORPORATION
    Inventors: Tadaaki Ikeda, Toru Hashimoto
  • Patent number: 11189758
    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: Grant
    Filed: July 23, 2019
    Date of Patent: November 30, 2021
    Assignee: NICHIA CORPORATION
    Inventors: Takuya Nakabayashi, Yukiko Yokote, Tadaaki Ikeda
  • Patent number: 11165006
    Abstract: The method of manufacturing a light emitting device includes: providing a first intermediate body, the first intermediate body including a temporary substrate including a base and a pair of first wirings, and a light emitting element including a pair of element electrodes, each of the pair of element electrodes connected to a respective one of the first wirings via a respective one of a plurality of solders; removing a portion of the temporary substrate to form a second intermediate body having a second lower surface in which a lower surface of each of the element electrodes and a lower surface of each of the plurality of solders are located; and forming a pair of external connection electrodes on the second lower surface such that each of the pair of external connection electrodes cover a respective one of the element electrodes and a respective one of the plurality of solders.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: November 2, 2021
    Assignee: NICHIA CORPORATION
    Inventors: Toru Hashimoto, Yoichi Bando, Tadaaki Ikeda, Gensui Tamura
  • Publication number: 20210305218
    Abstract: A light emitting device includes light emitting elements, light-transmissive members, a covering member, at least one first protrusion, and two second protrusions. The light emitting elements are aligned in a first direction. The light-transmissive members are respectively disposed on upper surfaces of the light emitting elements. The covering member includes at least one first covering portion and two second covering portions. The at least one first covering portion is arranged between adjacent ones of the light-transmissive members, and the second covering portions are arranged at distal ends of the light emitting device in the first direction with the light-transmissive members being arranged between the second covering portions. The at least one first protrusion is arranged on an upper surface of the at least one first covering portion and being spaced apart from the light-transmissive members. The second protrusions respectively arranged on upper surfaces of the second covering portions.
    Type: Application
    Filed: March 22, 2021
    Publication date: September 30, 2021
    Inventors: Tadaaki IKEDA, Yuki KAGEYAMA, Tetsuya ISHIKAWA, Toshifumi IMURA
  • Publication number: 20210257524
    Abstract: A method of manufacturing a light emitting element includes: providing a first light emitting part and a second light emitting part, the first light emitting part comprising a first base member and a first semiconductor layered body, the second light emitting part comprising a second base member and a second semiconductor layered body; bonding the first and second light emitting parts to each other such that the first base member and the second base member are disposed between the first semiconductor layered body and the second semiconductor layered body; disposing a light reflecting member to cover the bonded first and second light emitting parts; removing a portion of the light reflecting member to expose surfaces of the first and second base members; and disposing a wavelength conversion member on the exposed surface of the first base member and the exposed surface of the second base member.
    Type: Application
    Filed: April 19, 2021
    Publication date: August 19, 2021
    Applicant: NICHIA CORPORATION
    Inventors: Yoshiki INOUE, Naoto FURUHA, Tadaaki IKEDA
  • Patent number: 11038089
    Abstract: A light emitting device is provided. The light emitting device includes a light emitting element, which emits blue light, and a light transmissive member having a first principal face bonded to the light emitting element and a second principal face opposite the first principal face. The light transmissive member has a light transmissive base material and wavelength conversion substances, which are contained in the base material and which absorb the light from the light emitting element and emit light. The wavelength conversion substances are localized in the base material towards the first principal face, and include a first phosphor which emits green to yellow light and a second phosphor which emits red light. The first phosphor is more localized towards the first principal face than the second phosphor. The second phosphor is a manganese-activated fluoride phosphor.
    Type: Grant
    Filed: June 10, 2020
    Date of Patent: June 15, 2021
    Assignee: NICHIA CORPORATION
    Inventors: Tadaaki Ikeda, Takuya Nakabayashi
  • Patent number: 11011688
    Abstract: A light emitting element includes: a light reflecting member including a first region and a second region; a first semiconductor layered body disposed between the first region and the second region and configured to emit first light having a first peak wavelength; a second semiconductor layered body disposed between the first semiconductor layered body and the second region and configured to emit second light having a second peak wavelength different from the first peak wavelength; a base member disposed between the first semiconductor layered body and the second semiconductor layered body; and a wavelength conversion member on which the first light and the second light is incident, the wavelength conversion member producing third light having a third peak wavelength different from the first peak wavelength and the second peak wavelength.
    Type: Grant
    Filed: November 13, 2019
    Date of Patent: May 18, 2021
    Assignee: NICHIA CORPORATION
    Inventors: Yoshiki Inoue, Naoto Furuha, Tadaaki Ikeda
  • Publication number: 20210098663
    Abstract: A light emitting device includes a first light emitting element, a second light emitting element, a first light-transmissive member, and a first wavelength converting member. The first light emitting element has a first light emitting element first surface at which a first n-side electrode and a first p-side electrode are disposed, and a first light emitting element second surface. The second light emitting element has a second light emitting element first surface at which a second n-side electrode and a second p-side electrode are disposed, and a second light emitting element second surface. The first light-transmissive member covers the first light emitting element fourth surface of the first light emitting element and a second light emitting element fourth surface of the second light emitting element. The first wavelength converting member is disposed on the first light-transmissive member.
    Type: Application
    Filed: September 23, 2020
    Publication date: April 1, 2021
    Applicant: NICHIA CORPORATION
    Inventors: Tadaaki IKEDA, Yukiko YOKOTE
  • Patent number: 10957834
    Abstract: A light-emitting device having an upper surface, a lower surface opposite to the upper surface, and a first lateral surface, the upper surface serving as a light-emitting surface, the first lateral surface being adjacent and orthogonal to the upper surface, the first lateral surface serving as a mounting surface, the light-emitting device including: a pair of a first metal films disposed at the lower surface; and a pair of second metal films disposed at the first lateral surface; wherein an area of each of the second metal films is larger than an area of each of the first metal films.
    Type: Grant
    Filed: October 7, 2019
    Date of Patent: March 23, 2021
    Assignee: NICHIA CORPORATION
    Inventor: Tadaaki Ikeda
  • Publication number: 20210050488
    Abstract: A light emitting device includes a first light emitting element including a rectangular first light extraction surface, a second light emitting element including a rectangular second light extraction surface and emitting light having an emission peak wavelength different from an emission peak wavelength of the first light emitting element, and a light-transmissive member covering the first light extraction surface and the second light extraction surface. The light-transmissive member includes a first light-transmissive layer facing the first light extraction surface and the second light extraction surface, a wavelength conversion layer located on the first light-transmissive layer, and a second light-transmissive layer located on the wavelength conversion layer. The first light-transmissive layer contains a first matrix and first diffusive particles. The wavelength conversion layer contains a second matrix and wavelength conversion particles.
    Type: Application
    Filed: November 2, 2020
    Publication date: February 18, 2021
    Applicant: NICHIA CORPORATION
    Inventors: Takuya NAKABAYASHI, Tadaaki IKEDA, Toru HASHIMOTO, Yukiko YOKOTE
  • Patent number: 10854790
    Abstract: A light emitting device includes a first light emitting element including a rectangular first light extraction surface, a second light emitting element including a rectangular second light extraction surface and emitting light having an emission peak wavelength different from an emission peak wavelength of the first light emitting element, and a light-transmissive member covering the first light extraction surface and the second light extraction surface. The light-transmissive member includes a first light-transmissive layer facing the first light extraction surface and the second light extraction surface, a wavelength conversion layer located on the first light-transmissive layer, and a second light-transmissive layer located on the wavelength conversion layer. The first light-transmissive layer contains a first matrix and first diffusive particles. The wavelength conversion layer contains a second matrix and wavelength conversion particles.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: December 1, 2020
    Assignee: NICHIA CORPORATION
    Inventors: Takuya Nakabayashi, Tadaaki Ikeda, Toru Hashimoto, Yukiko Yokote
  • Publication number: 20200303599
    Abstract: A light emitting device is provided. The light emitting device includes a light emitting element, which emits blue light, and a light transmissive member having a first principal face bonded to the light emitting element and a second principal face opposite the first principal face. The light transmissive member has a light transmissive base material and wavelength conversion substances, which are contained in the base material and which absorb the light from the light emitting element and emit light. The wavelength conversion substances are localized in the base material towards the first principal face, and include a first phosphor which emits green to yellow light and a second phosphor which emits red light. The first phosphor is more localized towards the first principal face than the second phosphor. The second phosphor is a manganese-activated fluoride phosphor.
    Type: Application
    Filed: June 10, 2020
    Publication date: September 24, 2020
    Applicant: NICHIA CORPORATION
    Inventors: Tadaaki IKEDA, Takuya NAKABAYASHI
  • Publication number: 20200287095
    Abstract: A light-emitting device includes a substrate including a base member having an upper surface having a substantially rectangular shape, a lower surface opposite to the upper surface, a first longer lateral surface, a second longer lateral surface opposite to the first longer lateral surface, a first shorter lateral surface, and a second shorter lateral surface opposite to the first shorter lateral surface, first wirings disposed on the upper surface, and second wirings disposed on the lower surface and each electrically connected with a respective one of the first wirings; at least one light-emitting element; and a light-reflective covering member covering lateral surfaces of the light-emitting element and the upper surface of the base member. The base member has at least one first recess open at the upper surface and the first longer lateral surface. Surfaces defining the at least one first recess are covered with the covering member.
    Type: Application
    Filed: May 26, 2020
    Publication date: September 10, 2020
    Applicant: NICHIA CORPORATION
    Inventors: Takuya NAKABAYASHI, Tadaaki IKEDA
  • Patent number: 10734555
    Abstract: A light emitting device is provided. The light emitting device includes a light emitting element, which emits blue light, and a light transmissive member having a first principal face bonded to the light emitting element and a second principal face opposite the first principal face. The light transmissive member has a light transmissive base material and wavelength conversion substances, which are contained in the base material and which absorb the light from the light emitting element and emit light. The wavelength conversion substances are localized in the base material towards the first principal face, and include a first phosphor which emits green to yellow light and a second phosphor which emits red light. The first phosphor is more localized towards the first principal face than the second phosphor. The second phosphor is a manganese-activated fluoride phosphor.
    Type: Grant
    Filed: September 18, 2018
    Date of Patent: August 4, 2020
    Assignee: NICHIA CORPORATION
    Inventors: Tadaaki Ikeda, Takuya Nakabayashi
  • Patent number: 10707384
    Abstract: A light-emitting device includes a substrate including a base member having an upper surface having a substantially rectangular shape, a lower surface opposite to the upper surface, a first longer lateral surface, a second longer lateral surface opposite to the first longer lateral surface, a first shorter lateral surface, and a second shorter lateral surface opposite to the first shorter lateral surface, first wirings disposed on the upper surface, and second wirings disposed on the lower surface and each electrically connected with a respective one of the first wirings; at least one light-emitting element; and a light-reflective covering member covering lateral surfaces of the light-emitting element and the upper surface of the base member. The base member has at least one first recess open at the upper surface and the first longer lateral surface. Surfaces defining the at least one first recess are covered with the covering member.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: July 7, 2020
    Assignee: NICHIA CORPORATION
    Inventors: Takuya Nakabayashi, Tadaaki Ikeda
  • Patent number: 10700248
    Abstract: A light emitting device includes: a rectangular substrate, a light emitting element, a reflective member disposed at one or more lateral sides of the light emitting element while being away from therefrom, a light guide member, and a light transmissive member on the light guide member. The reflective member includes one or more first reflective members opposing lateral faces of the light emitting element, and a second reflective member outside the first reflective member. The first reflective members have inner lateral faces opposing each other each having an oblique or curved portion slanted so that a distance therebetween increases towards the light transmissive member from a side close to the substrate. The second reflective member covers outer lateral faces of the light transmissive member and the first reflective members, and an upper face of the second reflective member is flush with an upper face of the light transmissive member.
    Type: Grant
    Filed: August 20, 2019
    Date of Patent: June 30, 2020
    Assignee: NICHIA CORPORATION
    Inventors: Tadaaki Ikeda, Toru Hashimoto