Patent ID: 7759691
Filing Date: 2010-07-20
Classification: H01L

Abstract:
1. A light emitting diode comprising: a substrate; a light emitting diode chip mounted on the substrate; and an encapsulation unit disposed on the substrate and encapsulating the light emitting diode chip, the encapsulation unit comprising a first encapsulation material located over the light emitting diode chip and a second encapsulation material encircling the first encapsulation material, a plurality of first particles with a first distributing density being distributed in the first encapsulation material, a plurality of second particles with a second distributing density being distributed in the second encapsulation material; wherein the first distributing density is larger than the second distributing density, a central portion of light from the light emitting diode chip transmits through the first encapsulation material and exits the encapsulation unit via a top surface of the first encapsulation material, and a periphery portion of light from the light emitting diode chip transmits through the second encapsulation material and exits the encapsulation unit via a top surface of the second encapsulation material.