Patents Assigned to Masakatsu Uchiyama
  • Light diffusion type light emitting diode
    Patent number: 5140220
    Abstract: An improved light emitting diode housing member comprises a transparent housing that can extend over the light emitting surface of the LED and can position a plurality of granular optical particles, such as calcium fluoride, over the source of light to provide a diffusion of the emitted light, thereby increasing its viewing angle.
    Type: Grant
    Filed: September 1, 1988
    Date of Patent: August 18, 1992
    Assignees: Yumi Sakai, Masakatsu Uchiyama
    Inventor: Yasuo Hasegawa