Patents by Inventor Noboru Iwata

Noboru Iwata 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).

  • Publication number: 20250255094
    Abstract: An electroluminescent element including an anode, a cathode, and a light-emitting layer provided between the anode and the cathode, in which the electroluminescent element further includes an electron transport layer including n-type semiconductor particles and a first insulating polymer, and a hole transport layer including p-type semiconductor particles, the electron transport layer is provided between the cathode and the light-emitting layer, the hole transport layer is provided between the anode and the light-emitting layer, and a volume proportion of the n-type semiconductor particles in the electron transport layer is smaller than a volume proportion of the p-type semiconductor particles in the hole transport layer.
    Type: Application
    Filed: March 21, 2025
    Publication date: August 7, 2025
    Inventors: NOBORU IWATA, HISAYUKI UTSUMI, YOSHIHIRO UETA
  • Patent number: 12284861
    Abstract: An electroluminescent element including an anode, a cathode, and a light-emitting layer provided between the anode and the cathode, in which the electroluminescent element further includes an electron transport layer [[(33) including n-type semiconductor particles and a first insulating polymer, and a hole transport layer including p-type semiconductor particles, the electron transport layer is provided between the cathode and the light-emitting layer, the hole transport layer is provided between the anode and the light-emitting layer, and a volume proportion of the n-type semiconductor particles in the electron transport layer is smaller than a volume proportion of the p-type semiconductor particles in the hole transport layer.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: April 22, 2025
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Noboru Iwata, Hisayuki Utsumi, Yoshihiro Ueta
  • Patent number: 12209214
    Abstract: A light-emitting element includes a hole transport layer between a light-emitting layer and an anode, the hole transport layer containing either a metal oxide of (NiO)1-x(LaNiO3)x (composition formula 1) or (CuyO)1-x(LaNiO3)x (composition formula 2), where 0<x?1 and 1?y?2.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: January 28, 2025
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Shinichi Handa, Yoshihiro Ueta, Noboru Iwata
  • Patent number: 12200953
    Abstract: A light-emitting device includes an HTL including a metal chalcogenide between an anode and an EML, with an IL including an organic material at least between the HTL and the EML. A distance between the HTL and the EML in a light-emitting element that emits light in a wavelength band having the shortest light emission peak wavelength is greater than a distance between the HTL and the EML in each of the other light-emitting elements.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: January 14, 2025
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Takayuki Naka, Yoshihiro Ueta, Noboru Iwata
  • Publication number: 20240373663
    Abstract: A light-emitting element includes: an anode; a hole transport layer, a light-emitting layer containing quantum dots; an electron transport layer, and a cathode, arranged in this order, the light-emitting element further including a charge blocking layer either between the light-emitting layer and the hole transport layer or between the light-emitting layer and the electron transport layer or both, wherein the charge blocking layer contains, as an element: a transition metal element that is a component of an oxide semiconductor, at least one selected from Al, Mg, and Si; and O.
    Type: Application
    Filed: July 22, 2024
    Publication date: November 7, 2024
    Inventors: Noboru Iwata, Kenji Kimoto
  • Patent number: 12114521
    Abstract: A light-emitting element is provided with an anode, a light-emitting layer including quantum dots, and a cathode. The light-emitting element includes: an electron transport layer provided between the cathode and the light-emitting layer; and a hole tunneling insulating layer provided between the anode and the light-emitting layer and in contact with the anode and the light-emitting layer.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: October 8, 2024
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Takayuki Naka, Yoshihiro Ueta, Noboru Iwata
  • Patent number: 12075643
    Abstract: A light-emitting element (2) includes: an anode (4); a hole transport layer (6); a light-emitting layer (8) containing quantum dots (16); an electron transport layer (10); and a cathode (12), arranged in this order, the light-emitting element further including a charge blocking layer (14) either between the light-emitting layer and the hole transport layer or between the light-emitting layer and the electron transport layer or both, wherein the charge blocking layer contains, as an element: a transition metal element that is a component of an oxide semiconductor; at least one selected from Al, Mg, and Si; and O.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: August 27, 2024
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Noboru Iwata, Kenji Kimoto
  • Patent number: 11943947
    Abstract: A light-emitting device includes: an anode; a cathode; a light-emitting layer between the anode and the cathode; and a hole transport layer between the anode and the light-emitting layer, the hole transport layer containing carbon and a metal oxide in a prescribed, adjusted ratio.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: March 26, 2024
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Shinichi Handa, Noboru Iwata
  • Publication number: 20230413589
    Abstract: A light-emitting element includes: an anode; a cathode provided across from the anode; and a light-emitting layer provided between the anode and the cathode, and containing first quantum dots and second quantum dots, the first quantum dots each having a core-shell structure including a first core and a first shell provided on a surface of the first core, and the second quantum dots each having a core-shell structure including a second core and a second shell provided on a surface of the second core. A CBM of the first shell is lower than a CBM of the second shell, and a VBM of the first shell is lower than a VBM of the second shell.
    Type: Application
    Filed: October 14, 2020
    Publication date: December 21, 2023
    Inventors: TAKAYUKI NAKA, NOBORU IWATA, MAKOTO IZUMI
  • Patent number: 11832466
    Abstract: An electroluminescent element according to an aspect of the disclosure includes: a pair of a cathode electrode and an anode electrode; a light-emitting layer provided between the cathode electrode and the anode electrode; an electron transport layer provided between the cathode electrode and the light-emitting layer; and a hole transport layer provided between the anode electrode and the light-emitting layer. The light-emitting layer includes ZnSe-based quantum dots including ZnSe and one of the electron transport layer and the hole transport layer is composed of ZnO particles having an average particle size of 3 nm or greater and 30 nm or less.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: November 28, 2023
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tadashi Kobashi, Kenichi Yoshimura, Masashi Kago, Noboru Iwata
  • Patent number: 11822075
    Abstract: A display device according to one aspect of the present invention includes: a display unit configured to have display information and emits visible light having a continuous spectrum; an infrared cut-off part configured to transmit the visible light from the display unit and to reduce the amount of infrared light striking the display unit; and a reflecting part configured to reflect the visible light having passed through the infrared cut-off part. The infrared cut-off part includes a first polymer film and a second polymer film, the first polymer film includes an infrared cut-off layer configured to reduce infrared light transmission, and the second polymer film includes a high-retardation polyester film and is disposed between the first polymer film and the display unit.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: November 21, 2023
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Yuji Saito, Noboru Iwata, Atsushi Ono, Kentaro Tamura
  • Patent number: 11737295
    Abstract: An electroluminescent element according to an aspect of the disclosure includes: a pair of a cathode electrode and an anode electrode; a light-emitting layer provided between the cathode electrode and the anode electrode; an electron transport layer provided between the cathode electrode and the light-emitting layer; and a hole transport layer provided between the anode electrode and the light-emitting layer. The light-emitting layer includes ZnSe-based quantum dots including ZnSe and one of the electron transport layer and the hole transport layer is composed of ZnO particles having an average particle size of 3 nm or greater and 30 nm or less.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: August 22, 2023
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tadashi Kobashi, Kenichi Yoshimura, Masashi Kago, Noboru Iwata
  • Publication number: 20230006166
    Abstract: A light-emitting device includes an HTL including a metal chalcogenide between an anode and an EML, with an IL including an organic material at least between the HTL and the EML. A distance between the HTL and the EML in a light-emitting element that emits light in a wavelength band having the shortest light emission peak wavelength is greater than a distance between the HTL and the EML in each of the other light-emitting elements.
    Type: Application
    Filed: December 4, 2019
    Publication date: January 5, 2023
    Inventors: TAKAYUKI NAKA, YOSHIHIRO UETA, NOBORU IWATA
  • Publication number: 20220393130
    Abstract: An electroluminescent element including an anode, a cathode, and a light-emitting layer provided between the anode and the cathode, in which the electroluminescent element further includes an electron transport layer including n-type semiconductor particles and a first insulating polymer, and a hole transport layer including p-type semiconductor particles, the electron transport layer is provided between the cathode and the light-emitting layer, the hole transport layer is provided between the anode and the light-emitting layer, and a volume proportion of the n-type semiconductor particles in the electron transport layer is smaller than a volume proportion of the p-type semiconductor particles in the hole transport layer.
    Type: Application
    Filed: September 26, 2019
    Publication date: December 8, 2022
    Inventors: NOBORU IWATA, HISAYUKI UTSUMI, YOSHIHIRO UETA
  • Patent number: 11417851
    Abstract: A light-emitting element includes: a first electrode; a second electrode; a quantum dot layer including layered quantum dots between the first electrode and the second electrode; and a hole transport layer formed of LaNiO3 between the quantum dot layer and the first electrode.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: August 16, 2022
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Shinichi Handa, Yoshihiro Ueta, Noboru Iwata
  • Publication number: 20220235265
    Abstract: A light-emitting element includes a hole transport layer between a light-emitting layer and an anode, the hole transport layer containing either a metal oxide of (NiO)1-x(LaNiO3)x (composition formula 1) or (CuyO)1-x(LaNiO3)x (composition formula 2), where 0<x?1 and 1?y?2.
    Type: Application
    Filed: June 24, 2019
    Publication date: July 28, 2022
    Inventors: SHINICHI HANDA, YOSHIHIRO UETA, NOBORU IWATA
  • Patent number: 11342524
    Abstract: A light-emitting element is provided to improve light emission efficiency of a light-emitting element. The light-emitting element includes: a first electrode; a second electrode; a quantum dot layer provided between the first electrode and the second electrode, in which quantum dots are layered; and a hole-transport layer provided between the quantum dot layer and the first electrode, wherein the hole-transport layer includes a plurality of layers each containing a different material, the plurality of layers of the hole-transport layer each have an ionization potential increasing from the first electrode toward the quantum dot layer, and, among the plurality of layers of the hole-transport layer, a layer in contact with the quantum dot layer is higher in ionization potential than the quantum dot layer.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: May 24, 2022
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yoshihiro Ueta, Shinichi Handa, Noboru Iwata
  • Publication number: 20220158115
    Abstract: A light-emitting element is provided with an anode, a light-emitting layer including quantum dots, and a cathode. The light-emitting element includes: an electron transport layer provided between the cathode and the light-emitting layer; and a hole tunneling insulating layer provided between the anode and the light-emitting layer and in contact with the anode and the light-emitting layer.
    Type: Application
    Filed: March 4, 2019
    Publication date: May 19, 2022
    Inventors: TAKAYUKI NAKA, YOSHIHIRO UETA, NOBORU IWATA
  • Publication number: 20220149309
    Abstract: A light-emitting element (2) includes: an anode (4); a hole transport layer (6); a light-emitting layer (8) containing quantum dots (16); an electron transport layer (10); and a cathode (12), arranged in this order, the light-emitting element further including a charge blocking layer (14) either between the light-emitting layer and the hole transport layer or between the light-emitting layer and the electron transport layer or both, wherein the charge blocking layer contains, as an element: a transition metal element that is a component of an oxide semiconductor; at least one selected from Al, Mg, and Si; and O.
    Type: Application
    Filed: February 26, 2019
    Publication date: May 12, 2022
    Inventors: NOBORU IWATA, KENJI KIMOTO
  • Patent number: 11289667
    Abstract: The light-emitting device includes, between an anode electrode and a cathode electrode, a light-emitting layer, a hole transport layer, and an electron transport layer. The light-emitting layer includes quantum dots configured to emit light as a result of combination of positive holes and electrons. The electron transport layer includes a metal oxide, and an energy level of a lower end of a conduction band of the metal oxide is less than or equal to an energy level of a lower end of a conduction band of the quantum dots.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: March 29, 2022
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tadashi Kobashi, Yoshihiro Ueta, Makoto Izumi, Noboru Iwata