Patent ID: 7542635
Filing Date: 2009-06-02
Classification: G02B,G09F

Abstract:
1. A light emitting device providing illumination comprising: a) a first light emitting surface; b) a second light emitting surface opposite the first surface; c) at least one light emitting source comprising an array of light emitting diodes; d) a first anisotropic backward and forward scattering region disposed in the optical path from the light source to the first light emitting surface comprising a first continuous phase material of refractive index n wherein the first anisotropic backward and forward scattering region anisotropically scatters light backward toward the second light emitting surface and anisotropically scatters light forward toward the first light emitting surface, the light emitting device emits illuminating light from the first and second light emitting surfaces, and the emitted light from at least one of the light emitting surfaces provides anisotropic illumination.