Patent ID: 7700965
Filing Date: 2010-04-20
Classification: H01L

Abstract:
1. An LED comprising: a base having a concave depression; a chip mounted on a bottom of the concave depression; a first transparent material received in the depression and sealing the chip, wherein the chip includes a light emitting surface, the first transparent material includes a light output surface over the light emitting surface and faces ambient air, the light output surface defines a plurality of recesses, and a mixture comprising a second transparent material and fluorescent powder is filled in each of the recesses, the first and second transparent materials having different refractive indexes; and wherein the chip generates first light rays, the fluorescent powder generates second light rays after absorbing a portion of the first light rays which falls incident on the mixtures in the recesses, and another portion of the first light rays directly coming out to the ambient air via other parts of the light output surface without the recesses interacts with the second light rays to form third light rays.