Patent ID: 7766534

Claim:
A planar lighting device comprising: a pair of light sources; a light guide plate being disposed between said pair of light sources and having a sectional shape in a form of a reversed wedge growing wider in a direction in which light beam emitted by each of said pair of light sources travels, said light guide plate including: a light exit plane; and a pair of light entrance planes, each being provided opposite to each of said pair of light sources; a housing for accommodating said pair of light sources and said light guide plate; heat sinks, each for absorbing heat generated by each of said pair of light sources, and each being connected to each of said pair of light sources; and heat pipes, each for releasing said heat absorbed by each of said heat sinks toward a center area of said housing, and each being disposed on a face of each of said heat sinks so as to extend toward said center of said housing.