SURFACE LIGHT SOURCE DEVICE AND ITS LIGHT GUIDE PLATE

摘要

A light guide plate has a light introduction part having an end face configured to have light incident thereon, and a light guide plate body disposed continuously to the light introduction part and comprising a thickness smaller than a maximum thickness of the light introduction part. The light guide plate body has a light emitting surface that emits the light incident from the end face. The light introduction part comprises an inclined face disposed on at least one side of the light guide plate. The inclined face is inclined smoothly from a surface of a part thicker than the light guide plate body toward an end of the light guide plate body. An optical pattern part has a linear pattern element is disposed near a region in a proximity of the inclined face in a face on a light exit side of the light guide plate body.

主权项

1. A light guide plate comprising:
a light introduction part comprising an end face configured to have light incident thereon; and a light guide plate body disposed continuously to the light introduction part and comprising a thickness smaller than a maximum thickness of the light introduction part, wherein the light guide plate body comprises a light emitting surface that emits the light incident from the end face, wherein the light introduction part comprises an inclined face disposed on at least one side of the light guide plate, wherein the inclined face is inclined smoothly from a surface of a part thicker than the light guide plate body toward an end of the light guide plate body, and wherein an optical pattern part comprising a linear pattern element is disposed near a region in a proximity of the inclined face in a face on a light exit side of the light guide plate body.