Patent ID: 8835958

Claim:
An LED package, comprising: a substrate with a top surface, a bottom surface, a plurality of side surfaces interconnecting the top surface with the bottom surface, and two opposite notches depressed downward from lateral peripheral portions of the top surface; two electrodes penetrating through the substrate, each of the two electrodes being exposed at both the top surface and the bottom surface of the substrate; an LED die arranged on the substrate and electrically connected to the two electrodes; and a lens arranged on the substrate and covering the LED die, the lens comprising a contacting surface adjoining the top surface of the substrate, two protrusions extending from lateral peripheral portions of the contacting surface and being respectively embedded in the two notches; wherein the contacting surface defines a recess at a center thereof, the recess accommodating the LED die therein, the recess being depressed away from the substrate and defining a curved inner surface for functioning as a light incident surface for the light emitted from the LED die; wherein the inner surface is rough; wherein a roughness of the inner surface decreases from a center of the inner surface towards a peripheral portion of the inner surface; and wherein the lens comprises a plurality of cone-like protrusions extending from the inner surface, the cone-like protrusions have different sizes, wherein the size of the cone-like protrusions at a central portion of the inner surface is larger than that at the peripheral portion of the inner surface.