PLANAR ILLUMINATION DEVICE

摘要

PURPOSE: A surface lighting device is provided to improve light efficiency by including a light source unit which supplies light to the thickness direction of a light guide plate. CONSTITUTION: A light guide plate emits incoming light through a lower surface. A light source unit (120) comprises multiple light emitting diodes and a substrate. The light source unit supplies light to the thickness direction of the light guide plate. A side reflecting member (180) is equipped in the side end portion of the light guide plate. A frame (110) installs the light guide plate, the light source unit, and the side reflecting member.