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: A lighting device or a lamp bulb (100, 200) with a smooth appearance comprises at least one light source (101); a heat sink component (104, 204), having a bottom (1043) and a side wall (1044) extending from the bottom (1044), wherein the bottom (1043) comprises a protrusion (1041) and wherein the at least one light source (101) thermally contacts the protrusion (1041) of the heat sink component (104, 204); and a cover provided on the sidewall (1044) opposite to the bottom(1043), thereby defining an air chamber (1051, 2051) between the cover, the side wall (1044), the bottom (1043) and the protrusion (1041).

Abstract: A light bulb (1) is disclosed. The light bulb (1) comprises: a connector (2) for mechanically and electrically connecting the light bulb (1) to a light bulb socket; a light source (4) electrically connected to receive electrical power from the connector (2), wherein the light source (4) is separated from the connector (2) along a central axis (A) of the light bulb (1); and an internal structure (5) arranged along the central axis (A) between the connector (2) and the light source (4), wherein an axial direction is defined along the central axis (A) from the connector (2) towards the internal structure (5). The light bulb (1) further comprises a light-transmissive optical element (7) provided with an internal cavity (8) housing the light source (4) and the internal structure (5), the optical element (7) thereby forming an outer contour of the light bulb (1).

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 or a lamp bulb (100, 200) with a smooth appearance comprises at least one light source (101); a heat sink component (104, 204), having a bottom (1043) and a side wall (1044) extending from the bottom (1044), wherein the bottom (1043) comprises a protrusion (1041) and wherein the at least one light source (101) thermally contacts the protrusion (1041) of the heat sink component (104, 204); and a cover provided on the sidewall (1044) opposite to the bottom(1043), thereby defining an air chamber (1051, 2051) between the cover, the side wall (1044), the bottom (1043) and the protrusion (1041).

Abstract: A cooling arrangement (1) for cooling of an apparatus (10) which in use may generate heat is disclosed. The cooling arrangement (1) comprises a first member (2), which comprises a first base (4) and a first spiral wrap (5) extending from the first base (4), and a second member (3), which comprises a second base (6) and a second spiral wrap (7) extending from the second base (6). The first spiral wrap (5) and the second spiral wrap (7) are interleaved. The first member (2) is configured to at least thermally couple the apparatus (10) thereto. At least one of the first member (2) and the second member (3) can be moved so as to result in an orbiting motion of one of the first spiral wrap (5) and the second spiral wrap (7) relatively to the other one of the first spiral wrap (5) and the second spiral wrap (7) such that a volume of fluid in at least one space between the first spiral wrap (5) and the second spiral wrap (7) progressively moves during the orbiting motion.

Abstract: According to the invention a lamp (100, 200) is provided. The lamp (100, 200) comprising: a wick structure (102, 202) hosting a solid state light source (104, 204) and comprising a fixed wick material (108, 208), an envelope (106, 206) forming a cavity (109, 209) hosting the wick structure (102, 202), wherein the cavity (109, 209) is configured as a heat pipe comprising a working fluid (110, 210), wherein the envelope (106, 206) is shaped such that condensed working fluid (110, 210) is guided towards the fixed wick material (108, 208) independently of the spatial orientation of the lamp (100, 200).

Abstract: According to the invention a lamp (100, 200) is provided. The lamp (100, 200) comprising: a wick structure (102, 202) hosting a solid state light source (104, 204) and comprising a fixed wick material (108, 208), an envelope (106, 206) forming a cavity (109, 209) hosting the wick structure (102, 202), wherein the cavity (109, 209) is configured as a heat pipe comprising a working fluid (110, 210), wherein the envelope (106, 206) is shaped such that condensed working fluid (110, 210) is guided towards the fixed wick material (108, 208) independently of the spatial orientation of the lamp (100, 200).

Abstract: The present invention relates to a flat lighting device (1) comprising a carrier (2) including a thermally conductive layer (7), at least one solid state light source (3) arranged on a front side of the carrier (2), and an electrically insulating cover member (5a, 5b) in thermal contact with said front side and a back side opposite said front side. The cover member (5a, 5b) is adapted to transfer heat from said carrier (2) out of the lighting device. The cover member (5a, 5b) comprises an optical structure (4) arranged on the carrier (2) in front of the at least one light source (3) and adapted to direct the light emitted by the at least one solid state light source (3).

Abstract: An illumination device includes a carrier, at least two light sources mounted on a first side of a carrier, and an envelope at least partially enclosing light sources and the carrier. At least one of the light sources is mounted on a portion of the carrier and at least another one of the light sources is mounted on a different portion of the carrier, and the carrier is folded such that the second side of the first portion of the carrier at least partially faces the second side of the second portion of the carrier.

Abstract: A lighting device (100, 400) comprising a cover having an inside (128) and an outside (129). The cover defines a light emitting portion (112), a driver circuitry chamber (114), a transition portion (113) between the light emitting portion (112) and the driver circuitry chamber (114), and a cap portion (115) at the opposite end of the driver circuitry chamber (114) compared to the transition portion (113). The lighting device (100, 400) further comprises a carrier (104) arranged in the light emitting portion (112) and solid state light sources (106) mounted on the carrier (106). The lighting device (100, 400) further comprises a thermally conductive inlay (120, 121, 420, 421) in thermal contact with the cover and arranged along the inside of the cover for transferring heat from the light emitting portion (112) to at least one of the transition portion (113), the driver circuitry chamber (114) and the cap portion (115).

Abstract: The present invention relates to a flat lighting device (1) comprising a carrier (2) including a thermally conductive layer (7), at least one solid state light source (3) arranged on a front side of the carrier (2), and an electrically insulating cover member (5a, 5b) in thermal contact with said front side and a back side opposite said front side. The cover member (5a, 5b) is adapted to transfer heat from said carrier (2) out of the lighting device. The cover member (5a, 5b) comprises an optical structure (4) arranged on the carrier (2) in front of the at least one light source (3) and adapted to direct the light emitted by the at least one solid state light source (3).

Abstract: A cooling fan (1) for cooling an electronic device (2) is disclosed. The cooling fan (1) comprises a heat sink (5) thermally connectable to the electronic device (2), the heat sink (5) having a first clearance side (6a, 6b) centered relative to a longitudinal axis (L) of the heat sink (5), and several thermally conductive fan blades (13) arranged in a circle centered on the longitudinal axis (L). The fan blades (13) are rotatable relative to the heat sink (5) about the longitudinal axis (L) by a motor (19) and each fan blade (13) has a second clearance side (14) facing the first clearance side (6a, 6b). A clearance space (18) is provided between the first clearance side (6) and each second clearance side (14), the majority of said clearance spaces (18) having a size of 100 micrometer or less in a direction perpendicular to the first clearance side (6a, 6b) and the corresponding second clearance side (18).

Abstract: A cooling fan (1) for cooling an electronic device (2) is disclosed. The cooling fan (1) comprises a heat sink (5) thermally connectable to the electronic device (2), the heat sink (5) having a first clearance side (6a, 6b) centered relative to a longitudinal axis (L) of the heat sink (5), and several thermally conductive fan blades (13) arranged in a circle centered on the longitudinal axis (L). The fan blades (13) are rotatable relative to the heat sink (5)about the longitudinal axis (L) by a motor (19) and each fan blade (13) has a second clearance side (14) facing the first clearance side (6a, 6b). A clearance space (18) is provided between the first clearance side (6) and each second clearance side (14),the majority of said clearance spaces(18) having a size of 100 micrometer or less in a direction perpendicular to the first clearance side (6a, 6b) and the corresponding second clearance side (18).

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 present invention relates to a lighting device (11) comprising a light emitting portion with at least two solid state light sources, SSL (18). The light emitting portion includes a first cover member (12a) with a first light source carrier (13a) and a first light transmitting portion (14), a second cover member (12b) with a second light source carrier (13b) and a second light transmitting portion (14). The first and second cover member are arranged such that a first light transmitting portion is aligned with the second SSL to allow transmission of light emitted from the second SSL through the first cover member, and a second light transmitting portion is aligned with the first SSL to allow transmission of light emitted from the first SSL through the second cover member. According to this design, light emitted from an SSL on one cover member will be transmitted through the other cover member. Dissipation of heat from each SSL may be provided in the other direction, i.e.

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: The invention provides a lamp (1) comprising a light source (10), and a light transmissive heat pipe (251) configured to dissipate thermal energy from the light source (10), wherein the heat pipe (251) has an internal surface (53) and includes a heat pipe working fluid (252), wherein the heat pipe (251) further includes a flexible conduit (270) configured as wick, wherein the flexible conduit (270) comprises a flexible conduit connection part (271a), an outer face (273), a longitudinal channel (274) with an opening at an end (271, 272), and at least one side opening (275) in the outer face (273) to the longitudinal channel (274), wherein the flexible conduit (270) is connected at the flexible conduit connection part (271a) with the internal surface (53) at a first position (51).

Abstract: A light source cooling body (100), a light source assembly, a luminaire and a method to manufacture a light source cooling body or a light source assembly are provided. The light source cooling body comprises a homogeneous body (104) made of a thermally conductive material. The homogenous body comprises an open space that comprises a wick structure, a condenser (112) and an evaporator (116). Near the evaporator the light source cooling body has an interface area (102) to thermally couple with a light source and to receive heat from the light source. The condenser is arranged away from the interface area. A portion 114 of the open space is tubular shaped. The open space may hold a cooling liquid partially in the gaseous phase and partially in the liquid phase and the wick structure is configured to transport the cooling material in the liquid phase towards the evaporator.

Abstract: The invention provides a lamp (1) comprising (i) a solid state light source (10) and a first envelope (100) at least partially enclosing the light source (10), thereby forming a first cavity (150) hosting said solid state light source (10), wherein at least part of the first envelope (100) is transmissive for visible light (11) generated by the solid state light source (10); and (ii) a second envelope (200) at least partially enclosing the first envelope (100), wherein the first envelope (100) and the second envelope (200) provide a second cavity (250) at least partially enclosing the light source (10), wherein at least part of the second envelope (200) is transmissive for visible light (11) generated by the light source (10) and transmitted through the first envelope (100) into the second cavity (250), wherein the second cavity (250) is configured as a heat pipe (251).