Surface light source device of side light type and display

A display for illuminating an object to be illuminated by a surface light source device of side light type arranged on the rear of the substance to be illuminated, comprising:

• the surface light source device including a light guide plate having an emitting surface as one of major surfaces, a primary light source to supply light to said light guide plate through a lateral side thereof so as to allow light to emit through said emitting surface, a reflection sheet member arranged along a surface opposite to said emitting surface of said light guide plate, and having a function to return light, which leaks out of said light guide plate through the surface opposite to said emitting surface, to said light guide plate, a support member including a side plate to surround the lateral side of said light guide plate and a muntin connected to said side plate so as to support said light guide plate and said reflection member, and a light quantity correction surface to prevent irregularities in luminance from occurring on said emitting surface correspondingly to said muntin;
• wherein said light quantity correction surface corrects at least one of a quantity of illumination light, which is transmitted through said reflection member and is then allowed to return to said light guide plate after having been reflected by said muntin, and a quantity of illumination light, which is allowed to return to said light guide plate without being reflected by said muntin, so as to allow said light leaking out of said light guide plate to uniformly return to said light guide plate.