Patents by Inventor Hiroki BANNO

Hiroki BANNO 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: 20250053074
    Abstract: A light source device includes a first light source section including one or more first light emitters to emit first light; a second light source section including one or more second light emitters to emit second light; a light-transmissive member having a central axis to transmit the first light and the second light; and circuitry to individually drive the one or more first light emitters and the one or more second light emitters to reduce illuminance of light emitted from the light-transmissive member to below a predetermined illuminance level. The first light source section emits the first light that enters the light-transmissive member at a positive angle relative to the central axis in a view in a direction orthogonal to the central axis, and the second light source section emits the second light that enters the light-transmissive member at a negative angle relative to the central axis in the view.
    Type: Application
    Filed: July 22, 2024
    Publication date: February 13, 2025
    Inventors: Kazuhiro FUJITA, Naoki NAKAMURA, Noritada OHI, Hiroki TANAKA, Yoshio KUBO, Toshiharu HACHISUKA, Kasumi NAKAMURA, Mayu BANNO
  • Patent number: 12006459
    Abstract: A phosphor powder of the present invention is a phosphor powder which contains an inorganic compound in which Eu as an activator is solid-soluted in a crystal represented by Ba26Si51O2N84 or in an inorganic crystal having the same crystal structure as the crystal represented by Ba26Si51O2N84, and which is constituted such that in an emission spectrum obtained by irradiating the phosphor powder with excitation light having a wavelength of 450 nm, when a luminescence intensity at a peak wavelength in a range of equal to or more than 750 nm and equal to or less than 950 nm is P0, and when a luminescence intensity at a peak wavelength in a range of equal to or more than 520 nm and equal to or less than 600 nm is P1, 0.01?P1/P0?0.12 is satisfied by P0 and P1.
    Type: Grant
    Filed: August 10, 2021
    Date of Patent: June 11, 2024
    Assignee: DENKA COMPANY LIMITED
    Inventors: Hiroki Banno, Hiroaki Toyoshima
  • Publication number: 20240124773
    Abstract: A phosphor powder containing a phosphor represented by General Formula (I) below. In General Formula (I), M1 includes at least La and optionally further includes one or more elements selected from the group made of lanthanoid elements other than Y and La, M2 includes at least Ba and optionally further includes one or more elements selected from the group made of Mg, Ca, and Sr, x is equal to or more than 0.005 and equal to or less than 0.2, y is equal to or more than 0 and equal to or less than 0.1, and z is more than 0.44 and equal to or less than 0.99: (Eu(1-x)(1-z)M1xM2(1-x)z)2(Si1-yAly)5N8 . . . (I).
    Type: Application
    Filed: February 25, 2022
    Publication date: April 18, 2024
    Applicant: DENKA COMPANY LIMITED
    Inventors: Hiroki BANNO, Hiroaki TOYOSHIMA
  • Patent number: 11952520
    Abstract: A method for manufacturing a phosphor powder of the present invention, in which the phosphor powder contains an inorganic compound in which Eu as an activator is solid-soluted in a crystal represented by Ba26Si51O2N84 or in an inorganic crystal having the same crystal structure as the crystal represented by Ba26Si51O2N84, the method including: a mixing step of mixing a raw material containing each element constituting the inorganic compound to obtain a raw material mixture blended such that b=51 and a/b>(26?c)/51 are satisfied when molar ratios of Ba, Si, and Eu in the raw material mixture are respectively a, b, and c; a firing step of firing the raw material mixture to obtain a fired product; and a cleaning treatment step of subjecting the fired product to an acid treatment and/or a water treatment.
    Type: Grant
    Filed: August 10, 2021
    Date of Patent: April 9, 2024
    Assignee: DENKA COMPANY LIMITED
    Inventors: Hiroki Banno, Hiroaki Toyoshima
  • Publication number: 20230323199
    Abstract: A method for manufacturing a phosphor powder of the present invention, in which the phosphor powder contains an inorganic compound in which Eu as an activator is solid-soluted in a crystal represented by Ba26Si51O2N84 or in an inorganic crystal having the same crystal structure as the crystal represented by Ba26Si51O2N84, the method including: a mixing step of mixing a raw material containing each element constituting the inorganic compound to obtain a raw material mixture blended such that b=51 and a/b>(26?c)/51 are satisfied when molar ratios of Ba, Si, and Eu in the raw material mixture are respectively a, b, and c; a firing step of firing the raw material mixture to obtain a fired product; and a cleaning treatment step of subjecting the fired product to an acid treatment and/or a water treatment.
    Type: Application
    Filed: August 10, 2021
    Publication date: October 12, 2023
    Applicant: DENKA COMPANY LIMITED
    Inventors: Hiroki BANNO, Hiroaki TOYOSHIMA
  • Publication number: 20230323201
    Abstract: A phosphor powder of the present invention is a phosphor powder which contains an inorganic compound in which Eu as an activator is solid-soluted in a crystal represented by Ba26Si51O2N84 or in an inorganic crystal having the same crystal structure as the crystal represented by Ba26Si51O2N84, and which is constituted such that in an emission spectrum obtained by irradiating the phosphor powder with excitation light having a wavelength of 450 nm, when a luminescence intensity at a peak wavelength in a range of equal to or more than 750 nm and equal to or less than 950 nm is P0, and when a luminescence intensity at a peak wavelength in a range of equal to or more than 520 nm and equal to or less than 600 nm is P1, 0.01?P1/P0?0.12 is satisfied by P0 and P1.
    Type: Application
    Filed: August 10, 2021
    Publication date: October 12, 2023
    Applicant: DENKA COMPANY LIMITED
    Inventors: Hiroki BANNO, Hiroaki TOYOSHIMA