Patent ID: 7554258

Claim:
A conversion LED, comprising: one LED for emitting a primary radiation, the LED comprising a semiconductor material selected from the group consisting of GaInN, GaN, and a combination thereof; and one luminescence conversion body for converting the primary radiation into a secondary radiation, wherein the luminescence conversion body is a polycrystalline ceramic body sintered together from individual base crystallites that are formed by a base material that is doped by a dopant such that the polycrystalline ceramic body acts partly or completely as luminescent material by virtue of at least part of the base material being activated by said dopant, wherein the ceramic body has a ceramic density of above 90% so that the ceramic body is translucent to both the primary radiation and the secondary radiation, wherein the ceramic body comprises at least one optical element for influencing a beam path of the primary radiation and a beam path of the secondary radiation, said optical element being formed from a plurality of scattering centers, the scattering centers comprising impurity crystallites selected from the group consisting of aluminum oxide, titanium oxide, yttrium aluminum garnet (YAG), yttrium oxide, and combinations thereof within the ceramic body, and wherein one or more zone of the ceramic body have a high concentration of the impurity crystallites.