HIGHLY EFFICIENT PLANAR LIGHT SOURCE ELEMENT USING PLANAR SIDE FACE LIGHT SOURCE

摘要

PROBLEM TO BE SOLVED: To provide a planar light source that is highly efficient and environment-friendly by adhering the whole side of a light guide body having an emitting light control sheet to a planar side light source which uses electroluminescence (EL).;SOLUTION: By optically coupling the whole side of the light guide body into which light is made incident from at least one side face where the emitted light control sheet is installed with the planar side light source as the incident light by means of physical sticking or scientific adhesion, light loss caused by the total reflection of the emitted light from the light source to the side face of the light guide body is prevented, and the light from the light-emitting face of the light guide body can be taken out efficiently toward the front direction while brightness unevenness is made less.;COPYRIGHT: (C)2008,JPO&INPIT