Abstract: A heat sink for cooling a heat generating device comprises a body part with a first surface for contacting the heat generating device, and a second surface contacting a cooling part, and the cooling part including a cooling structure. The structure density of the cooling structure decreases with increasing distance to body part. The cooling structure may be a three dimensional structure e.g. a grid or a lattice, but the cooling structure may also be fins projecting or extending from the second surface of the body part. The heat sink can be manufactured using additive manufacturing e.g. selective laser melting process (SLM). The heat sink can be made of metals e.g. aluminum, copper, ceramics e.g. aluminium nitride (AlN), silicon carbide or a composite containing graphite, graphene or carbon nanotubes.

Abstract: There is provided a LED (light emitting diode) lamp assembly including a heat sink having a cooling structure with an outer circumference part and a centre part that supports a plurality of LEDs, and wherein a material thickness of the cooling structure increases inwards from the outer circumference part to the centre of the heat sink. There is also provided a LED lamp assembly including a heat sink having a centre, an outer circumference part supporting a plurality of LEDs, and a cooling structure with a number of vent-holes allowing passage of air, where the cooling structure is supported by the outer circumference part and extending inwards towards the centre from the outer circumference part, and where a material thickness of the cooling structure may decrease inwards from the outer circumference part to the centre of the heat sink.

Abstract: There is provided a LED lamp assembly (1300) comprising a heat sink (1301) having a cooling structure with an outer circumference part and a center part (1311), which supports a plurality of LEDs, and the material thickness of the cooling structure increases inwards from the outer circumference part to the center of the heat sink. The LED assembly may further comprise a lampshade supported by the outer circumference part of the heat sink. There is also provided a LED lamp assembly comprising a heat sink having a center, an outer circumference part supporting a plurality of LEDs, and a cooling structure with a number of vent-holes allowing passage of air, the cooling structure supported by the outer circumference part and extending inwards towards the center from the outer circumference part.

Abstract: There is provided a LED lamp assembly (1300) comprising a heat sink (1301) having a cooling structure with an outer circumference part and a centre part (1311), which supports a plurality of LEDs, and the material thickness of the cooling structure increases inwards from the outer circumference part to the centre of the heat sink. The LED assembly may further comprise a lampshade supported by the outer circumference part of the heat sink. There is also provided a LED lamp assembly comprising a heat sink having a centre, an outer circumference part supporting a plurality of LEDs, and a cooling structure with a number of vent-holes allowing passage of air, the cooling structure supported by the outer circumference part and extending inwards towards the centre from the outer circumference part.