Patent ID: 8801257

Claim:
An edge light type planar light source device comprising: a light guide plate arranged to emit light, which enters from an end face of the light guide plate, from a front face of the light guide plate; a linear light source unit that comprises: a plurality of LED elements each comprising light emitting surfaces from which light is emitted; and an LED substrate on which the LED elements are aligned, the light emitting surfaces being opposed to the end face of the light guide plate; a floor face, on which the light guide plate is disposed; and a locking member erecting on the floor face, that is inserted in a peripheral portion of the light guide plate from a back face of the light guide plate toward the front face of the light guide plate, wherein some of the LED elements are disposed in a vicinity of the locking member, and the some LED elements are disposed on the LED substrate such that the light emitting surfaces of the some LED elements are inclined toward the end face of the light guide plate to gather the light at the rear of the locking member.