Patent ID: 8598778
Filing Date: 2013-12-03
Classification: C03C,C09K,F21K,F21V,F21Y,H01L,H05B

Abstract:
1. A light emitting device, comprising: a base; a light emitting diode (LED) supported by the base; a first layer spaced apart from the LED and comprising a light emitting material, the first layer having a refractive index n an optic element in contact with the first layer and having a refractive index n wherein the optic element has, at a surface of contact with the first layer, a radius r measured along a ray originating from the LED, and, at an output surface of the optic element, another radius R measured along the same ray originating from the LED, such that R is at least equal to r·(n wherein n wherein a dimension of the first layer corresponds to the radius r, wherein the radius r is at least equal to √[A/(4πP)], wherein A is the surface area of the LED, and wherein P is a specified fraction of reentry.