Patent ID: 8994896
Filing Date: 2015-03-31
Classification: G02B,G02F,G09F,H01L

Abstract:
1. A surface light source comprising: a light emitting device including a light source and a lens, the lens being configured to cover the light source and expand light from the light source; and a diffuser plate configured to be disposed opposite to the light emitting device and be extended orthogonal to an optical axis of the light source, wherein a plurality of the light emitting devices are configured to be disposed in line along one side of the diffuser plate and be opposite to a central portion of the diffuser plate, the lens including: an incident surface configured to enter the light from the light source into the lens; an output surface configured to output the light incident to the lens from the lens; and a bottom surface configured to be located around the incident surface and located on an opposite side relative to the output surface, and the bottom surface including a reflection unit having a concave shape along the optical axis at a flat area of the bottom surface.