SURFACE LIGHT SOURCE DEVICE

摘要

PURPOSE: A planar light source device is provided for a light emitting surface to uniformly emit light by easily radiating light to outside using a light radiating surface. CONSTITUTION: A light guide plate (33) comprises a light introducing part and a light guide plate main body. The light introducing plate has an inclined surface (36). The inclined surface is inclined to the end of the surface of the light guide plate main body. The light guide plate main body comprises a light radiating pattern. The light radiating pattern radiates light from a light radiating surface (39).