Patent ID: 9625641
Date: 2017-04-18
CPC Classifications: G02B,Y10T

Claim:
1. A light guide device comprising: a base substrate having a first refractive index, wherein one or more light sources are mounted upon a first surface of the base substrate; a first guide layer having a second refractive index that is less than or equal to the first refractive index and which comprises a light output surface, the first guide layer being arranged so as to encapsulate the one or more light sources upon the first surface, wherein the base surface and the first guide layer form a composite transparent structure, wherein light produced by the one or more light sources is guided within both the base substrate and the first guide layer over the first surface; and a heat sink plate attached to a lower surface of the base substrate via discrete portions of thermal bonding material positioned in line with the one or more light sources such that the discrete portions of thermal bonding material are completely blocked from view by the one or more light sources when viewed from the light output surface of the first guide layer, and there are one or more air gaps formed between the heat sink plate and the base substrate.