Patents by Inventor Shigeoka Toshiaki

Shigeoka Toshiaki 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 Converter, Light-Emitting Device, Method of Producing Wavelength Converter and Method of Producing Light-Emitting Device
    Publication number: 20080231170
    Abstract: A light-emitting device comprises a light-emitting element 3 that is provided on a substrate 2 and emits excitation light, and a wavelength converter 4 that converts the excitation light into visible light. The visible light is output light. The wavelength converter 4 comprises a plurality of wavelength conversion layers 4a, 4b and 4c which respectively contain, as phosphors, at least one type of semiconductor ultrafine particles having a mean particle size of not more than 20 nm and at least one type of fluorescent substance having a mean particle size of not less than 0.1 ?m in a resin matrix. Thereby, self-quenching of phosphors is reduced and high luminous efficiency is attained.
    Type: Application
    Filed: January 26, 2005
    Publication date: September 25, 2008
    Inventors: Fukudome Masato, Shigeoka Toshiaki, Nakagawaji Fujito, Ozaki Tetsuaki