Patents by Inventor Noriyoshi Kumazawa

Noriyoshi Kumazawa 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 source device
    Patent number: 8182115
    Abstract: Disclosed is a light source device that has lower costs and lower power consumption compared to a halogen lamp, and has the same spectral characteristics as the halogen lamp. The light source device includes a white LED that emits White light having an emission peak in a blue range and an optical filter that partially reduces the quantity of light in the blue range in the white light emitted from the white LED such that the spectral characteristics of the white light emitted from the white LED are close to those of light emitted from a halogen lamp.
    Type: Grant
    Filed: August 14, 2009
    Date of Patent: May 22, 2012
    Assignee: Fujinon Corporation
    Inventors: Hidenori Takahashi, Noriyoshi Kumazawa
  • LIGHT SOURCE DEVICE
    Publication number: 20100085758
    Abstract: Disclosed is a light source device that has lower costs and lower power consumption compared to a halogen lamp, and has the same spectral characteristics as the halogen lamp. The light source device includes a white LED that emits white light having an emission peak in a blue range and an optical filter that partially reduces the quantity of light in the blue range in the white light emitted from the white LED such that the spectral characteristics of the white light emitted from the white LED are close to those of light emitted from a halogen lamp.
    Type: Application
    Filed: August 14, 2009
    Publication date: April 8, 2010
    Inventors: Hidenori Takahashi, Noriyoshi Kumazawa