Patents by Inventor Takuma Hashmoto

Takuma Hashmoto 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).

  • Light emitting device using light emitting diode chip
    Patent number: 7717589
    Abstract: A light emitting device comprises: an LED chip mounted in a recess formed in a mounting substrate; a wavelength converting member that is disposed so as to cover the recess and the edge area around the recess and that is excited by light emitted from the LED chip to emit light of a wavelength different from an excitation wavelength; and an emission control member disposed at a light output side of the wavelength converting member so as to allow emission of light coming from an area of the wavelength converting member that corresponds to the recess and to prevent emission of light coming from an area of the wavelength converting member that corresponds to the edge area around the recess. This can prevent variations in color between light emitted from the central part of the wavelength converting member and light emitted from the part of the wavelength converting member that is located on the edge area around the recess of the mounting substrate, thereby reducing unevenness of color on the irradiation surface.
    Type: Grant
    Filed: November 25, 2004
    Date of Patent: May 18, 2010
    Assignee: Panasonic Electric Works Co., Ltd.
    Inventors: Kouji Nishioka, Masaru Sugimoto, Hideyoshi Kimura, Ryoji Yokotani, Yutaka Iwahori, Takuma Hashmoto, Shinya Ishizaki, Satoshi Mori, Hiroyuki Sekii, Eiji Shiohama
  • Light emitting device using light emitting diode chip
    Publication number: 20070085103
    Abstract: A light emitting device comprises: an LED chip mounted in a recess formed in a mounting substrate; a wavelength converting member that is disposed so as to cover the recess and the edge area around the recess and that is excited by light emitted from the LED chip to emit light of a wavelength different from an excitation wavelength; and an emission control member disposed at a light output side of the wavelength converting member so as to allow emission of light coming from an area of the wavelength converting member that corresponds to the recess and to prevent emission of light coming from an area of the wavelength converting member that corresponds to the edge area around the recess. This can prevent variations in color between light emitted from the central part of the wavelength converting member and light emitted from the part of the wavelength converting member that is located on the edge area around the recess of the mounting substrate, thereby reducing unevenness of color on the irradiation surface.
    Type: Application
    Filed: November 25, 2004
    Publication date: April 19, 2007
    Applicant: MATSUSHITA ELECTRIC WORKS, LTD.
    Inventors: Kouji Nishioka, Masaru Sugimoto, Hideyoshi Kimura, Ryoji Yokotani, Yutaka Iwahori, Takuma Hashmoto, Shinya Ishizaki, Satoshi Mori, Hiroyuki Sekii, Eiji Shiohama