Planar light source and method of manufacture of the same

摘要

The planar light source of this invention comprises: a light guide plate made of a platelike, light-transmitting material formed with a reflection surface on a bottom side thereof, the reflection surface being formed by combining a plurality of kinds of reflection means; and an illuminating light source arranged opposite a light receiving side surface of the light guide plate; wherein the light guide plate has formed smooth a boundary on the reflection surface between the plurality of kinds of reflection means so as not to form any step between the adjoining reflection means. This construction prevents the formation of a dark-bright fringe pattern between the plurality of reflections means when the light source is illuminated.