Patents by Inventor Yoko MICHIWAKI

Yoko MICHIWAKI 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).

  • ELECTROLUMINESCENT ELEMENT, LIGHT EMITTING DEVICE, AND PRODUCTION METHOD FOR ELECTROLUMINESCENT ELEMENT
    Publication number: 20240150649
    Abstract: A light-emitting element includes an anode electrode, a QD layer containing QDs, and a cathode electrode, in which the QDs are Cd-free quantum dots having a core-shell structure including a core containing at least Ag, Ga, and at least one of S and Se, and a shell containing at least Zn, and exhibit fluorescence characteristics with a fluorescence full-width at half-maximum of 40 nm or less and a fluorescence quantum yield percentage of 70% or more.
    Type: Application
    Filed: March 31, 2021
    Publication date: May 9, 2024
    Inventors: Kazuki GOTO, Yusuke SAKAKIBARA, Masaki YAMAMOTO, Tatsuya RYOHWA, Akio MISHIMA, Soichiro NIKATA, Vit KALOUSEK, Yuko OGURA, Yoko MICHIWAKI
  • ELECTROLUMINESCENT ELEMENT
    Publication number: 20240107792
    Abstract: A light-emitting element includes an anode electrode, a cathode electrode, and a QD layer provided between the anode electrode and the cathode electrode, the QD layer containing the QDs. The QDs are AgInxGa1-xSySe1-y-based or ZnAgInxGa1-xSySe1-y-based Cd-free QDs (0?x<1, 0?y?1) and exhibit fluorescence characteristics having a fluorescent half width of 45 nm or less and a fluorescence quantum yield of 35% or more in a green wavelength region to a red wavelength region.
    Type: Application
    Filed: February 18, 2021
    Publication date: March 28, 2024
    Inventors: Kazuki GOTO, YUSUKE SAKAKIBARA, Yuma YAGUCHI, Keisuke KITANO, Masaki YAMAMOTO, Soichiro NIKATA, Yoko MICHIWAKI, Yuko OGURA, Vit KALOUSEK, Akio MISHIMA
  • QUANTUM DOT AND METHOD FOR PRODUCING THE SAME
    Publication number: 20240059966
    Abstract: To provide Cd-free chalcopyrite-based quantum dots with a narrow fluorescence FWHM and a high fluorescence quantum yield. The quantum dots of the present invention contain AgInxGa1-xSySe1-y or ZnAgInxGa1-xSySe1-y (where 0?x<1 and 0?y?1) and exhibit fluorescence properties including a fluorescence FWHM of less than or equal to 45 nm and a fluorescence quantum yield of greater than or equal to 35% in the green wavelength range to the red wavelength range.
    Type: Application
    Filed: October 24, 2023
    Publication date: February 22, 2024
    Applicant: NS MATERIALS INC.
    Inventors: Soichiro NIKATA, Yoko MICHIWAKI, Tomoaki HIEDA, Yuko OGURA, Akio MISHIMA, Vit KALOUSEK
  • Quantum dot and method for producing the same
    Patent number: 11834596
    Abstract: To provide Cd-free chalcopyrite-based quantum dots with a narrow fluorescence FWHM and a high fluorescence quantum yield. The quantum dots of the present invention contain AgInxGa1-xSySe1-y or ZnAgInxGa1-xSySe1-y (where 0?x<1 and 0?y?1) and exhibit fluorescence properties including a fluorescence FWHM of less than or equal to 45 nm and a fluorescence quantum yield of greater than or equal to 35% in the green wavelength range to the red wavelength range.
    Type: Grant
    Filed: July 31, 2020
    Date of Patent: December 5, 2023
    Assignee: NS MATERIALS INC.
    Inventors: Soichiro Nikata, Yoko Michiwaki, Tomoaki Hieda, Yuko Ogura, Akio Mishima, Vit Kalousek
  • QUANTUM DOT AND METHOD FOR PRODUCING THE SAME
    Publication number: 20210363422
    Abstract: To provide Cd-free chalcopyrite-based quantum dots with a narrow fluorescence FWHM and a high fluorescence quantum yield. The quantum dots of the present invention contain AgInxGa1-xSySe1-y or ZnAgInxGa1-xSySe1-y (where 0?x<1 and 0?y?1) and exhibit fluorescence properties including a fluorescence FWHM of less than or equal to 45 nm and a fluorescence quantum yield of greater than or equal to 35% in the green wavelength range to the red wavelength range.
    Type: Application
    Filed: July 31, 2020
    Publication date: November 25, 2021
    Applicant: NS Materials Inc.
    Inventors: Soichiro NIKATA, Yoko MICHIWAKI, Tomoaki HIEDA, Yuko OGURA, Akio MISHIMA, Vit KALOUSEK