Osram Ag

Osram Gesellschaft MIT Beschrankter Haftung

Steffen Straub

Robert Kraus

Wolfgang Pabst

An LED lamp has a lamp base and a support connected to the lamp base, on which at least one LED is mounted, the support including at least one hollow element, each with at least two air passage openings to permit an air flow through a cavity of at least one hollow element.

LED lamp

The invention relates to an illumination device () comprising at least one preferably ceramic substrate plate (), at least one luminous element () arranged on a front side (A) of the substrate plate () in particular at least one light emitting diode (LED) (), and at least one preferably metallic heat sink () connected, in particular adhesively bonded and/or soldered, to a rear side (B) of the substrate plate () over a large area, wherein the coefficients of thermal expansion of substrate plate () and heat sink () differ at least by the factor 1.5, in particular by a factor greater than 2. The heat sink () has at least one preferably linear recess () on its side facing the rear side (B) of the substrate plate ().

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Wuppertal, Germany

Steffen Straub