Patents by Inventor Masahito TOTSUKA

Masahito TOTSUKA 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).

  • Planar illumination device and method of producing same
    Patent number: 8992064
    Abstract: A planar illumination device includes a light source unit, including a substantially planar emitting surface, configured to emit light to illuminate a substantially planar object, and a frame, formed in a frame shape enclosing the light source unit, disposed on an outer circumferential side of the light source unit, configured to hold the light source unit. The frame includes a reflecting part configured to reflect the light, and an absorbing part, formed integral with at least a part of an outer circumferential surface of the reflecting part, configured to absorb the light. The reflecting part and the absorbing part include joint interface therebetween that is inclined to a direction vertical to the emitting surface.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: March 31, 2015
    Assignee: Minebea Co., Ltd.
    Inventors: Tomotaka Horikawa, Masahito Totsuka, Shinji Kawai, Satoshi Kawashima
  • PLANAR ILLUMINATION DEVICE AND METHOD OF PRODUCING SAME
    Publication number: 20130135898
    Abstract: A planar illumination device includes a light source unit, including a substantially planar emitting surface, configured to emit light to illuminate a substantially planar object, and a frame, formed in a frame shape enclosing the light source unit, disposed on an outer circumferential side of the light source unit, configured to hold the light source unit. The frame includes a reflecting part configured to reflect the light, and an absorbing part, formed integral with at least a part of an outer circumferential surface of the reflecting part, configured to absorb the light. The reflecting part and the absorbing part include joint interface therebetween that is inclined to a direction vertical to the emitting surface.
    Type: Application
    Filed: March 30, 2012
    Publication date: May 30, 2013
    Applicant: MINEBEA CO., LTD.
    Inventors: Tomotaka HORIKAWA, Masahito TOTSUKA, Shinji KAWAI, Satoshi KAWASHIMA