Patent ID: 7794127
Filing Date: 2010-09-14
Classification: H01L,Y10S

Abstract:
1. A light emitting diode (LED) comprising: an LED chip comprising a light emitting surface; and an encapsulant enclosing of the LED chip, the encapsulant comprising a light output surface over the light emitting surface, wherein the light output surface defines a plurality of grooves each of which extends along a circumferential direction of the light output surface, each groove being cooperatively enclosed by a first groove wall and a second groove wall, the first groove wall being a portion of a circumferential side surface of an imaginary cone, a conical tip of the imaginary cone being located on the light emitting surface of the LED chip; wherein the plurality of grooves are located at a top of the LED, and the LED chip is located opposite to the grooves and closer to a bottom of the LED than the grooves; and wherein some ones of the second groove walls each have a diameter gradually decreasing from a bottom towards a top thereof, and other ones of the second groove walls each have a diameter gradually increasing from a bottom towards a top thereof.