Abstract: The disclosed embodiments relate to a lighting device (1) comprising an exit window (2) and a light source substrate (3) arranged to carry at least one solid-state light source (4), the at least one light source (4) being arranged to emit light through the exit window (2). The exit window (2) is shaped to allow a front surface of the light source substrate (3) to be brought into physical contact with a surface of the exit window facing the light source substrate (3), and in that the light source substrate (3) is held in physical contact with the exit window (2), thereby enabling thermal contact between the light source substrate (3) and the exit window (2). Since thermal contact between the exit window and the light source substrate is secured, the heat transfer of the lighting device will be improved.

Abstract: The present invention discloses an illumination device (100). The illumination device (100) comprises a light source (110) arranged to generate light, a carrier (120) arranged to support the light source and an envelope (130) enclosing the light source and the carrier. The envelope comprises at least two enveloping parts which, when joined together, form the envelope. Further, the carrier is arranged in thermal contact with at least one of the enveloping parts for dissipating heat out of the illumination device.

Abstract: A lighting device includes at least one light source arranged in contact with an electrically conducting layer, and mechanically secured to an electrically insulating heat sink element.

Abstract: A LED light source comprises: a first rectifier with a first and a second input terminal for connection to an AC supply voltage source and a first and a second output terminal connected by a first LED-string, a second rectifier having a first and a second input terminal and output terminals, said first input terminal of said second rectifier being coupled to the first input terminal of the first rectifier and the second input terminal of the second rectifier being coupled to the second input terminal of the first rectifier, and the output terminals being connected by a second LED-string, and means for causing a phase shift between the voltages that are present during operation at the output terminals of the first rectifier and the output terminals of the second rectifier respectively. The LED strings are driven by very simple circuitry that can be supplied by mains supply voltage. Due to the phase shift stroboscopic effects are suppressed.

Abstract: A lighting device is described. In one example, the lighting device comprises a first and second light sources disposed opposing the first light source, both the first and second light sources configured to generate light, a first and second electrically insulating heat sink elements comprises ovelapping portions separated by a distance, and a first and second flexible electrically conducting layers. The first and second light sources are arranged in contact with the first and second electrically conducting layers, respectively. The first and second electrically conducting layers are mounted to the first and second heat sink elements, respectively. The first and second heat sink elements each include a recess having shape of the first and second electrically conducting layers, respectively.

Abstract: The present invention provides an illumination device (100) comprising a light source (110) arranged to generate light, a carrier (120) arranged to support the light source and an envelope (130) enclosing the light source and the carrier. Further, the carrier is arranged in thermal contact with the envelope and both the envelope and the carrier are made of ceramic material. The present invention is advantageous in that it provides an illumination device providing an effective heat transfer.

Abstract: An illumination device comprising a light source (110). The illumination device comprises a thermally conducting carrier (130) arranged to support the light source. Furthermore, the illumination device comprises an envelope (120), wherein the carrier and the envelope together form a single compartment (140) at least partially enclosing the light source. The carrier is arranged to transfer heat (160) away from the light source to the envelope, and the envelope is arranged to dissipate heat (170) away from the illumination device. The carrier and the envelope of the illumination device may further form a single integrated part.

Abstract: The invention provides an illumination arrangement (1) for illuminating horticultural growths (100) with for instance LEDs as a light source. These LEDs are placed in a lighting unit (10). The lighting unit may especially have the ability to direct substantially all light from the light source (here the LEDs) to the horticultural growths (in the greenhouse). Additionally, a horticultural growth-recognition system (50) can be implemented in the illumination arrangement, so that the system can adapt for instance its beam (11) to the location of the horticultural growth(s) (in the case of growth or moving of plants, etc).

Abstract: There is provided a lighting device (100) in which at least one light source (121) is arranged to generate light. The lighting device comprises an electrically insulating heat sink element (111) onto which an electrically conducting layer (120) is arranged by means of a mechanical fastening means (130). The at least one light source is arranged in contact with the electrically conducting layer.

Abstract: This invention relates to thermal management for removing heat generated by a heat source (110). This is done by a combination of a heat conducting member (120), which is thermally connected to the heat source in one end and to a remotely arranged heat sink (130) in the opposite end, and a synthetic jet actuator (140). The synthetic jet actuator is arranged to provide active cooling directly onto the heat source by generating and directing an air flow towards the heat source. The synthetic jet actuator comprises a resonator cavity housing (150) and an oscillating member (160). The oscillator member is arranged at least partly inside said resonator cavity. The combination of the heat conducting member and the synthetic jet actuator provides a highly efficient cooling.

Abstract: The invention relates to a lighting device comprising a light source (31) which is mounted on a heat sink (32) having an outer contour (34). Furthermore, it comprises a cooling device (35) for dynamically cooling the light source via cooling of the heat sink by means of a fluid flowing alongside the contour of the heat sink, the cooling device having one or a plurality of cooling openings (36, 43). The cooling device is a vibrating membrane cooling system for generating a sequence of fluid pulses (39). The cooling openings are arranged alongside the heat sink. The light source comprises optical means (33) for collimating and directing light originating from the light source during operation, while the contour of the heat sink has a shape similar to that of the optical means.

Abstract: A multi-dimensional controller (150) controls the multiple parameters of a lighting system (250). A track-ball (100) that provides three axes of rotation (101-103), for example, is used to control each of three lighting parameters, such as chrominance, luminance, and saturation. In like manner, intensity, direction, and diffusion control may be controlled by a device with three degrees of freedom/control. Force-feedback (120) is optionally provided to indicate divergence from established presets (220) or recommended operating conditions. Switches (130) and other control elements are also provided to store or recall preset parameters (220), override scheduled lighting settings, and so on.

Abstract: The present invention provides an illumination device (100) comprising a light source (110) arranged to generate light, a carrier (120) arranged to support the light source and an envelope (130) enclosing the light source and the carrier. Further, the carrier is arranged in thermal contact with the envelope and both the envelope and the carrier are made of ceramic material. The present invention is advantageous in that it provides an illumination device providing an effective heat transfer.

Abstract: The present invention discloses an illumination device (100) and a method (4000) for assembly of such an illumination device. The illumination device (100) comprises a light source (110) arranged to generate light, a carrier (120) arranged to support the light source and an envelope (130) enclosing the light source and the carrier. The envelope comprises at least two enveloping parts which, when joined together, form the envelope. Further, the carrier is arranged in thermal contact with at least one of the enveloping parts for dissipating heat out of the illumination device. The method comprises the steps of mounting (4100) the light source in thermal contact with the carrier and enclosing (4200) the light source and the carrier with the envelope. The present invention is advantageous in that it provides a convenient design which facilitates the assembly of the illumination device. Further, the present invention is advantageous in that it provides an illumination device with improved heat transfer.

Abstract: The invention provides an illumination arrangement (1) for illuminating horticultural growths (100) with for instance LEDs as a light source. These LEDs are placed in a lighting unit (10). The lighting unit may especially have the ability to direct substantially all light from the light source (here the LEDs) to the horticultural growths (in the greenhouse). Additionally, a horticultural growth-recognition system (50) can be implemented in the illumination arrangement, so that the system can adapt for instance its beam (11) to the location of the horticultural growth(s) (in the case of growth or moving of plants, etc).

Abstract: This invention relates to thermal management for removing heat generated by a heat source (110). This is done by a combination of a heat conducting member (120), which is thermally connected to the heat source in one end and to a remotely arranged heat sink (130) in the opposite end, and a synthetic jet actuator (140). The synthetic jet actuator is arranged to provide active cooling directly onto the heat source by generating and directing an air flow towards the heat source. The synthetic jet actuator comprises a resonator cavity housing (150) and an oscillating member (160). The oscillator member is arranged at least partly inside said resonator cavity. The combination of the heat conducting member and the synthetic jet actuator provides a highly efficient cooling.

Abstract: The invention relates to a lighting device comprising a light source (31) which is mounted on a heat sink (32) having an outer contour (34). Furthermore, it comprises a cooling device (35) for dynamically cooling the light source via cooling of the heat sink by means of a fluid flowing alongside the contour of the heat sink, the cooling device having one or a plurality of cooling openings (36, 43). The cooling device is a vibrating membrane cooling system for generating a sequence of fluid pulses (39). The cooling openings are arranged alongside the heat sink. The light source comprises optical means (33) for collimating and directing light originating from the light source during operation, while the contour of the heat sink has a shape similar to that of the optical means.

Abstract: A supply assembly for a LED lighting module, comprising a supply unit to which the LED lighting module can be connected and a burst control unit which is capable of switching the power supply unit on and off with a burst frequency (fburst) so as to control the mean light output. Preferably, the burst control unit is provided with a pulse duration modulator for controlling the pulse length (T pulse) during which the supply unit is operative.

Abstract: A supply assembly for a LED lighting module, comprising a supply unit to which the LED lighting module can be connected and a burst control unit which is capable of switching the power supply unit on and off with a burst frequency (fburst) so as to control the mean light output. Preferably, the burst control unit is provided with a pulse duration modulator for controlling the pulse length (T pulse) during which the supply unit is operative.

Abstract: In an upconverter comprising a choke, a switching element and a diode, the switching element is controlled in such a way that the time interval during which the switching element is non-conducting is proportional to the time interval during which the diode is conducting. The upconverter has a high power factor for a wide range of the amplitude of the line voltage and a wide range of power taken at the output of the upconverter.