Patent ID: 7977702

Claim:
A light-emitting device comprising an LED and a light extraction layer, the LED comprising: a substrate having a first surface and an opposing second surface; an active layer sandwiched between a first layer having a first type of doping and a second layer having a second type of doping, the active layer generating light when holes and electrons recombine therein, the first layer, active layer, and second layer located on the first surface of the substrate, the first and second layers being substantially planar; a first electrode connected to the first layer, the first electrode being substantially transparent, and substantially planar; a second electrode connected to the second layer; the first electrode and the second electrode configured to provide a potential difference between the first layer and the second layer; and the light extraction layer located on the second surface of the substrate, the light extraction layer comprising: a clear layer of material with a top surface and a bottom surface; and random light scattering features located on the bottom surface of the clear layer of material; wherein the top surface of the clear layer of material is substantially planar and connected to the second surface of the substrate and wherein the index of refraction of the light extraction layer is equal to or greater than that of the substrate, and less than or equal to that of the surrounding medium of the substrate, wherein light entering the surrounding medium from the light extraction layer not under a condition of total internal reflection exits the light extraction layer through the surrounding medium.