Patents by Inventor Akhiro Kojima

Akhiro Kojima 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 and semiconductor light emitting device
    Patent number: 8669698
    Abstract: According to an embodiment, a wavelength converter includes a resin allowing light emitted from a light source to pass through, a plurality of particle-shaped fluorescent substances dispersed in the resin, and fillers dispersed in the resin with a particle diameter smaller than the fluorescent substance. The fluorescent substances absorb the light emitted from the light source and emits fluorescence having a wavelength different from a wavelength of the light emitted from the light source; and a distribution of the fillers has higher density near the fluorescent substance than a density at a middle position between the fluorescent substances adjacent to each other.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: March 11, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Miyoko Shimada, Akhiro Kojima, Yosuke Akimoto, Hideyuki Tomizawa, Hideto Furuyama, Yoshiaki Sugizaki
  • WAVELENGTH CONVERTER AND SEMICONDUCTOR LIGHT EMITTING DEVICE
    Publication number: 20130285536
    Abstract: According to an embodiment, a wavelength converter includes a resin allowing light emitted from a light source to pass through, a plurality of particle-shaped fluorescent substances dispersed in the resin, and fillers dispersed in the resin with a particle diameter smaller than the fluorescent substance. The fluorescent substances absorb the light emitted from the light source and emits fluorescence having a wavelength different from a wavelength of the light emitted from the light source; and a distribution of the fillers has higher density near the fluorescent substance than a density at a middle position between the fluorescent substances adjacent to each other.
    Type: Application
    Filed: August 29, 2012
    Publication date: October 31, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Miyoko SHIMADA, Akhiro Kojima, Yosuke Akimoto, Hideyuki Tomizawa, Hideto Furuyama, Yoshiaki Sugizaki