Abstract: A lighting device is disclosed that comprises a glass tube (10); a solid state lighting assembly in said glass tube, said assembly comprising an electrically insulating optical film (20) comprising at least one arcuate portion lining a part (12) of the inner surface of the glass tube, wherein the glass tube further comprises a further part (14) defining a light exit portion; and a plurality of solid state lighting elements (32) on a carrier (30), said carrier contacting said optical film; a thermally conductive member (40, 42) in between at least a part of the solid state lighting assembly and the glass tube for thermally coupling the solid state lighting elements to the glass tube; and a transparent or translucent electrically insulating cover (50, 60) contacting the electrically insulating optical film and covering the solid state lighting elements. A luminaire including such a lighting device and a lighting device assembly method are also disclosed.

Abstract: A lighting device including a glass tube; a solid state lighting assembly in said glass tube, said assembly having an electrically insulating optical film having at least one arcuate portion lining a part of the inner surface of the glass tube, wherein the glass tube further has a further part defining a light exit portion; and a plurality of solid state lighting elements on a carrier, said carrier contacting said optical film; a thermally conductive member in between at least a part of the solid state lighting assembly and the glass tube for thermally coupling the solid state lighting elements to the glass tube; and a transparent or translucent electrically insulating cover contacting the electrically insulating optical film and covering the solid state lighting elements. A luminaire including such a lighting device and a lighting device assembly method are also disclosed.

Abstract: The invention provides a lighting device comprising a light source and a heat sink (200). The heat sink (200) is configured to dissipate thermal energy from the light source when in operation. The heat sink comprises a plurality of pin-shaped fins (210) and a support (220), wherein each fin (210) has a fin height (h) relative to the support (220), a bottom part (213) associated with the support (220) and a top part (214), a cross-section having a first width (d1) and a second width (d2) having a ratio d1/d2 selected from the range of 1.2-10, and a first width axis, wherein the first width axes of the pin-shaped fins (210) are arranged parallel, and wherein the pin-shaped fins (210) are hollow over at least part of their fin height (h).

Abstract: The invention relates to a heat sink (1) for cooling a heat source, the heat sink comprising a heat distributor (12) comprising a 3-dimensional body with a side wall (13) arranged around a main axis (14), and a plurality of plates (11) coupled to and extending from the side wall, each of the plurality of plates being curved in a cross section perpendicular to the main axis, wherein the plates are twisted along the main axis (14) of the heat distributor. The present invention solves the excessive fin length issue that is needed for higher values of the external diameter vs. the internal diameter of the fins section. The fins have curvature in all directions, which is referred to as double curvature. This double curvature is the result of two curving of each fin in a radial direction and twisting of the fins along the axial direction.

Abstract: A lighting device is disclosed that comprises a glass tube (10); a solid state lighting assembly in said glass tube, said assembly comprising an electrically insulating optical film (20) comprising at least one arcuate portion lining a part (12) of the inner surface of the glass tube, wherein the glass tube further comprises a further part (14) defining a light exit portion; and a plurality of solid state lighting elements (32) on a carrier (30), said carrier contacting said optical film; a thermally conductive member (40, 42) in between at least a part of the solid state lighting assembly and the glass tube for thermally coupling the solid state lighting elements to the glass tube; and a transparent or translucent electrically insulating cover (50, 60) contacting the electrically insulating optical film and covering the solid state lighting elements. A luminaire including such a lighting device and a lighting device assembly method are also disclosed.

Abstract: A lighting device including a glass tube; a solid state lighting assembly in said glass tube, said assembly including an electrically insulating optical film having at least one arcuate portion lining a part of the inner surface of the glass tube, wherein the glass tube includes a further part defining a light exit portion; and a plurality of solid state lighting elements on a carrier, said carrier contacting said optical film; a thermally conductive member in between at least a part of the solid state lighting assembly and the glass tube for thermally coupling the solid state lighting elements to the glass tube; and a transparent or translucent electrically insulating cover contacting the electrically insulating optical film and covering the solid state lighting elements. A luminaire including such a lighting device and a lighting device assembly method are also disclosed.

Abstract: The invention provides a lighting device comprising a light source and a heat sink (200). The heat sink (200) is configured to dissipate thermal energy from the light source when in operation. The heat sink comprises a plurality of pin-shaped fins (210) and a support (220), wherein each fin (210) has a fin height (h) relative to the support (220), a bottom part (213) associated with the support (220) and a top part (214), a cross-section having a first width (d1) and a second width (d2) having a ratio d1/d2 selected from the range of 1.2-10, and a first width axis, wherein the first width axes of the pin-shaped fins (210) are arranged parallel, and wherein the pin-shaped fins (210) are hollow over at least part of their fin height (h).

Abstract: The invention relates to a heat sink (1) for cooling a heat source, the heat sink comprising a heat distributor (12) comprising a 3-dimensional body with a side wall (13) arranged around a main axis (14), and a plurality of plates (11) coupled to and extending from the side wall, each of the plurality of plates being curved in a cross section perpendicular to the main axis, wherein the plates are twisted along the main axis (14) of the heat distributor. The present invention solves the excessive fin length issue that is needed for higher values of the external diameter vs. the internal diameter of the fins section. The fins have curvature in all directions, which is referred to as double curvature. This double curvature is the result of two curving of each fin in a radial direction and twisting of the fins along the axial direction.

Abstract: A lighting device is disclosed that comprises a glass tube (10); a solid state lighting assembly in said glass tube, said assembly comprising an electrically insulating optical film (20) comprising at least one arcuate portion lining a part (12) of the inner surface of the glass tube, wherein the glass tube further comprises a further part (14) defining a light exit portion; and a plurality of solid state lighting elements (32) on a carrier (30), said carrier contacting said optical film; a thermally conductive member (40, 42) in between at least a part of the solid state lighting assembly and the glass tube for thermally coupling the solid state lighting elements to the glass tube; and a transparent or translucent electrically insulating cover (50, 60) contacting the electrically insulating optical film and covering the solid state lighting elements. A luminaire including such a lighting device and a lighting device assembly method are also disclosed.