Patents by Inventor Ai HAYASAKA

Ai HAYASAKA 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).

  • Wavelength conversion member
    Patent number: 11060020
    Abstract: A wavelength conversion member is provided which includes a phosphor layer having an increased pencil hardness and thereby has a reduced risk of breakage such as scattering of fragments of the phosphor layer or separation of the phosphor layer. A substrate 12 is made of sapphire, and a phosphor layer 14 is disposed on the substrate 12 and includes phosphor particles 16 and a light transmissive inorganic material 22. The phosphor layer 14 has a pencil hardness of 5B or above. The high hardness of the phosphor layer 14 reduces the risk of breakage such as the phosphor layer 14 being scattered as fragments or being separated from the substrate 12.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: July 13, 2021
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Toshimitsu Kikuchi, Yoshifumi Tsutai, Takashi Abe, Ai Hayasaka
  • WAVELENGTH CONVERSION MEMBER
    Publication number: 20190316034
    Abstract: A wavelength conversion member is provided which includes a phosphor layer having an increased pencil hardness and thereby has a reduced risk of breakage such as scattering of fragments of the phosphor layer or separation of the phosphor layer. A substrate 12 is made of sapphire, and a phosphor layer 14 is disposed on the substrate 12 and includes phosphor particles 16 and a light transmissive inorganic material 22. The phosphor layer 14 has a pencil hardness of 5B or above. The high hardness of the phosphor layer 14 reduces the risk of breakage such as the phosphor layer 14 being scattered as fragments or being separated from the substrate 12.
    Type: Application
    Filed: December 4, 2017
    Publication date: October 17, 2019
    Inventors: Toshimitsu KIKUCHI, Yoshifumi TSUTAI, Takashi ABE, Ai HAYASAKA