US Patent 7665873 Headlamp for vehicles

A headlamp for vehicles has at least one illumination device with one or more light-emitting diodes and with an optical system that is disposed in the light exit area and focuses the light of the light-emitting diodes for a forward lighting of the vehicle. At least one cooling body is provided for dissipating the heat output by the light-emitting diode, and the cooling body contains a number of cooling ribs. To configure the light cone, the cooling body is disposed in the optical axis of the light exit area of the light-emitting diodes between the light-emitting diodes and the optical system, at least the tip of a cooling rib of the cooling body is located at the focal point between the light-emitting diode and the optical system.