Spread illuminating apparatus

摘要

A spread illuminating apparatus includes: a light guide plate including a plurality of protrusions disposed along a side surface thereof such that a plurality of interspaces are formed with each interspace being located between two adjacent protrusions; and a plurality of LEDs which include first row LEDs and second row LEDs disposed in two rows respectively at the interspaces and the protrusions. The distal portion of the protrusion has, at its top end surface, a width which is larger than the width of an opening area of the recess of a lamp house and also smaller than the overall width of the lamp house. The first and second row LEDs adjacent to each other are disposed such that respective lamp houses of two adjacent LEDs partly overlap with each other when viewed from the light emission direction.