Patent ID: 7604389

Claim:
A surface light-source device comprising: a plurality of point light sources; a light-guide plate arranged for receiving light, emitted from the point light sources, incident on at least one lateral side of the light-guide plate, and for emitting light from an emitting surface thereof perpendicular to the one lateral side; a first case having a first lateral side formed approximately in parallel to the one lateral side of the light-guide plate; a light-source substrate on which the point light sources are arranged at predetermined intervals, the light-source substrate being disposed on the first lateral side of the first case; a substrate holder having projections in positions corresponding to the intervals between the point light sources, for clamping the light-source substrate and the first lateral side of the first case together by the projections; wherein first holes are formed in the first case on the side thereof opposite from the emitting surface of the light-guide plate, in order for the projections to pass through.