There is described an illumination unit with a planar carrier part having a plurality of light-emitting semiconductor components, in particular high-power light-emitting diodes, arranged on both sides of a main surface. On each side of the carrier part a heat sink is provided in each case. Each of the...http://www.google.fr/patents/US7794115?utm_source=gb-gplus-shareBrevet US7794115 - Illumination unit
