Planar light source and method for forming a light scatterer for a planar light source

摘要

A plane display lamp using one or two dot-like light sources. This plane display lamp comprises a plate-like light guiding member; a bottom plate covering a bottom surface of said light guiding member; a casing frame covering side faces of said light guiding member; a diffusing sheet covering a top surface of said light guiding member; and dot-like light sources provided on one side face or on two side faces opposite to each other of said light guiding member and emitting light to said light guiding member, and a light scatterer pattern is provided on a bottom surface of the light guiding member. When a side face thereof is inclined, a light scatterer pattern may be provided also on the inclined side face or just below the inclined side face.