Patent ID: 8467013
Filing Date: 2013-06-18
Classification: G02B,Y10T

Abstract:
1. A light guide device comprising: a base substrate having a first refractive index, upon a first surface of which are mounted one or more light sources and a first guide layer having a second refractive index that is less than or equal to the first refractive index, the first guide layer being arranged so as to encapsulate the one or more light sources upon the first surface, wherein upon the first guide layer is mounted a second guide layer having a third refractive index that is equal to or greater than the first guide layer, wherein at the interface between the first and second guide layers and above the one or more light sources is located one or more reflective light scattering structures, wherein the base substrate and the guide layers form a composite structure for guiding light produced by the one or more light sources over the first surface, and wherein said one or more reflective light scattering structures mask the appearance of the one or more light sources, wherein the light guide device comprises one or more further reflecting light scattering structures arranged so as to direct light away from the first surface of the base substrate, and wherein the one or more further reflecting light scattering structures are located on a second surface of the base substrate which is opposite to the first surface.