Patents by Inventor Michiyo Tokita

Michiyo Tokita 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 guide plate for surface light source
    Patent number: 8033710
    Abstract: A plurality of mirror surfaces (5), which extend in a direction (X-axis direction) perpendicular to a light incident surface (2a), are formed side by side in a longitudinal direction (Y-axis direction) of the light incident surface (2a) on a light distribution control surface (4a) of both surfaces (4a, 4b) of a light guide plate (1) in a thickness direction (Z-axis direction) thereof, and a plurality of prisms (7) extending in the Y-axis direction are formed side by side in the X-axis direction in areas other than the mirror surfaces (5). The mirror surfaces 5 are formed in such a way that Y-axis direction widths thereof vary in the X-axis direction.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: October 11, 2011
    Assignee: Stanley Electric Co., Ltd.
    Inventors: Atsushi Omori, Michiyo Tokita
  • LIGHT GUIDE PLATE FOR SURFACE LIGHT SOURCE
    Publication number: 20090086509
    Abstract: A plurality of mirror surfaces (5), which extend in a direction (X-axis direction) perpendicular to a light incident surface (2a), are formed side by side in a longitudinal direction (Y-axis direction) of the light incident surface (2a) on a light distribution control surface (4a) of both surfaces (4a, 4b) of a light guide plate (1) in a thickness direction (Z-axis direction) thereof, and a plurality of prisms (7) extending in the Y-axis direction are formed side by side in the X-axis direction in areas other than the mirror surfaces (5). The mirror surfaces 5 are formed in such a way that Y-axis direction widths thereof vary in the X-axis direction.
    Type: Application
    Filed: September 23, 2008
    Publication date: April 2, 2009
    Applicant: STANLEY ELECTRIC CO., LTD.
    Inventors: Atsushi Omori, Michiyo Tokita