Patent ID: 9551824
Date: 2017-01-24
CPC Classifications: G02B,G02F,Y10T

Claim:
1. A light guide plate comprising: a light exit surface; a back surface opposed to the light exit surface; a light entrance surface consisting of at least part of a side surface between the light exit surface and the back surface; said light guide plate further comprising: a body portion; and a light exit-side layer disposed on a side of the light exit surface side relative to the body portion and formed by curing of an ionizing radiation curable resin; wherein the light exit-side layer includes an optical element portion which defines the light exit surface and which has a plurality of unit shaped elements arranged in one direction, the one direction intersecting a direction connecting the light entrance surface and a surface which consists of another part of the side surface and which is opposed to the light entrance surface, each unit shaped element extending linearly in a direction intersecting the one direction; wherein a ratio (L/T) of a length L of the light guide plate, from the light entrance surface to the surface consisting of another part of the side surface and opposed to the light entrance surface, relative to an average thickness T of the light guide plate along a normal direction of a plate plane of the light guide plate, is not more than 500; and wherein a ratio (t