Patents by Inventor Hitomi Miki

Hitomi Miki 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: 7825578
    Abstract: An object of the present invention is to provide a light emitting device which emits light of deep yellowish color with high luminance. The light emitting device of the present invention comprises a light emitting element having a peak emission wavelength shorter than 490 nm, a fluorescent material for wavelength conversion which absorbs light from the light emitting element and emits light of a wavelength longer than that of the light from the light emitting element, and a filter which cuts off a part of a mixed light produced by mixing the light of the light emitting element and the light of the fluorescent material, wherein the light transmitted through the filter has a chromaticity coordinate on the chromaticity diagram according to CIE 1931 plotted in a region defined by a first point (x=0.450, y=0.450), a second point (x=0.250, y=0.650), a third point (x=0.350, y=0.750) and a fourth point (x=0.250, y=0.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: November 2, 2010
    Assignee: Nichia Corporation
    Inventors: Suguru Takashima, Masato Aihara, Tomohisa Kishimoto, Hitomi Miki, Kenichi Aoyagi, Takeshi Kihara
  • Publication number: 20070205711
    Abstract: An object of the present invention is to provide a light emitting device which emits light of deep yellowish color with high luminance. The light emitting device of the present invention comprises a light emitting element having a peak emission wavelength shorter than 490 nm, a fluorescent material for wavelength conversion which absorbs light from the light emitting element and emits light of a wavelength longer than that of the light from the light emitting element, and a filter which cuts off a part of a mixed light produced by mixing the light of the light emitting element and the light of the fluorescent material, wherein the light transmitted through the filter has a chromaticity coordinate on the chromaticity diagram according to CIE 1931 plotted in a region defined by a first point (x=0.450, y=0.450), a second point (x=0.250, y=0.650), a third point (x=0.350, y=0.750) and a fourth point (x=0.250, y=0.
    Type: Application
    Filed: February 28, 2007
    Publication date: September 6, 2007
    Applicant: NICHIA CORPORATION
    Inventors: Suguru Takashima, Masato Aihara, Tomohisa Kishimoto, Hitomi Miki, Kenichi Aoyagi, Takeshi Kihara