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US 2003/0156328 A1Published application
Light guide plate and surface light source device utilizing same
AssigneeSanyo Electric Co., Ltd.
InventorsYouichiro Goto, Toru Nose
Life of this patent
Estimating the term…
Abstract
A surface light source device includes a light guide plate. A light beam generated from a point light source is irradiated from a corner portion formed at a side surface of the light guide plate. The irradiated light beam is emitted from an upper surface on which prisms are formed. The prisms extend in a circular arc form so as to connect two side surfaces forming the corner portion.
Claims6
A light guide plate, comprising:
- a corner portion formed by a first side surface and a second side surface;
- and
- one main surface for emitting a light beam irradiated from said corner portion, wherein said one main surface is formed with a prism extending in circular arc form with rendering said corner portion as a center so as to connect said first side surface and said second side surface.
Dependencies are inferred from the claim text.