Patent ID: 6878969

Claim:
A light emitting device comprising: a semiconductor light emitting unit producing a light, said light emitting unit being composed of a first semiconductor layer of a first conductive type and a second semiconductor layer of a second conductive type opposite to said first conductive type, said second semiconductor layer being integrally stacked on said first semiconductor layer to define therebetween an interface; a pair of electrodes being attached respectively to said first and second semiconductor layers to apply a voltage across said interface for emitting the light from around said interface, a light guide superimposed on said first semiconductor layer and directing the light therethrough, said first semiconductor layer being developed directly on said light guide to form a unitary structure with said light guide and said second semiconductor layer; said light guide having a radiation surface through which said light is given off, wherein said radiation surface is formed with a refractor layer which comprises an array of a first medium and a second medium, said first and second mediums having refraction indexes different from each other and being arranged alternately across said radiation surface.