Patents by Inventor Shigeio Takeda

Shigeio Takeda 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: 20180254387
    Abstract: A light emitting device includes a first phosphor emitting a fluorescence having a peak emission wavelength of not less than 445 nm and not more than 490 nm, a second phosphor emitting a fluorescence having a peak emission wavelength of not less than 491 nm and not more than 600 nm, a third phosphor emitting a fluorescence having a peak emission wavelength of not less than 601 nm and not more than 670 nm, and a light emitting element that emits a light having a peak emission wavelength at a shorter wavelength side than the peak emission wavelength of the first phosphor. 0.586?x?0.734, 0.017?y?0.081, 0.239?z?0.384 and x+y+z=1 are satisfied, where x, y, z are defined as mass ratios of the first, second and third phosphors, respectively, to a total mass of the first, second and third phosphors.
    Type: Application
    Filed: November 21, 2017
    Publication date: September 6, 2018
    Inventors: Tomohiro Miwa, Shota Shimonishi, Shigeio Takeda, Satomi Seki, Daisuke Kato