The side surfaces of {HEAD ~ the light guide plate} with {TAIL ~ the light sources} provided thereon have a ridge like inclined surface formed thereon, when viewed from the illuminating surface, and the ridge like inclined surfaces serve as a light receiving surface with the light source arranged thereon 
with
The side surfaces of { HEAD ~ the light guide plate } with { TAIL ~ the light sources } provided thereon have a ridge like inclined surface formed thereon , when viewed from the illuminating surface , and the ridge like inclined surfaces serve as a light receiving surface with the light source arranged thereon
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH