Abstract: The present invention relates to a power control unit (40; 60) for controlling electrical power provided to a load (12), Min particular an LED unit (12) comprising one or more LEDs, said driver device comprising a converter unit (10) having an input terminal (42) for receiving an input voltage (V10) from an external power supply (22) and having an output terminal (44) for providing an output voltage (V14) to power the load (12), wherein the converter unit (10) comprises a switching device (14) for transforming the input voltage (V10) to the output voltage (V14), a control unit (20) for controlling the switching device (14), signal means (46; 62) connected to the output terminal (44) for applying a voltage or current signal to the output terminal (44), wherein the control unit (20) is connected to the signal means (46; 62) and adapted to control the signal means (46; 62).

Abstract: There is provided a housing comprising an electrically powered device and electrical connecting means. The (electrical connecting means of the) housing fit an interface means of an electrical power supply. The housing is provided with magnetically activable switching means which in a passive isolation state are open. The magnetically activable switching means prevent an electric current from passing between the electrical connecting means and the electrically powered device. The interface means comprise magnetic activation means enable an electric current to pass between the electrical connecting means and the electrically powered device when the housing has been properly installed.

Abstract: The invention relates to GLS-look-alike LED light source (100) comprising two different types of LEDs (21, 22), preferably LEDs emitting with a near UV spectrum and a blue or white spectrum, respectively. The light source (100) further preferably comprises a transparent bulb (40) with a shape similar to an incandescent lamp that is coated by a luminescent layer (30) to achieve a white lamp spectrum. The luminescent layer may contain one or two luminescent compositions.

Abstract: In a circuit (1) for sensing a property of light there are provided a first circuit element (7) that is sensitive to light and that is realized to generate an output signal (I1) during a measurement time period (?tM), wherein the output signal (I1) is generated according to light to which the first circuit element (7) is exposed and the temperature (T) of the first circuit element (7), and a second circuit element (8) that is realized to increase the temperature (T) of the first circuit element (7) during a warming time period (?tW) that precedes the measurement time period (?tM).

Abstract: Driver device (1) and a corresponding driving method for driving a load (100), in particular an LED assembly comprising two or more LEDs.

Abstract: Disclosed are methods and systems for controlling of a lighting system with a plurality of light sources, particularly to the semi-automatic commissioning of light sources of the lighting system or controlling of the creation of lighting scenes with the lighting system. A spatial coding of light is used for controlling a lighting system, particularly for commissioning of light sources of the lighting system. Some exemplary systems for controlling a lighting system with a plurality of light sources, include a light system controller for controlling the light sources to create a spatial light pattern coding one or more attributes of the light sources, and a light pattern capturing device comprising a scanner for capturing the created spatial light pattern and a communication unit for communicating with the light system controller in order to enable the controlling of the one or more light sources based on the captured spatial light pattern.

Abstract: What is described is a lighting unit 10 with a plurality of lighting segments 30a, 30b. The lighting segments 30a, 30b are arranged on a strip 40 in spaced relation from each other. Each lighting segment 30a, 30b is connected to an electrical supply terminal 20. In order to obtain a lighting unit with a flexible electrical configuration, each lighting segment 30a, 30b comprises at least one LED element and at least one driver circuit 36 including a controllable, current limiting element for controlling a current through the LED element.

Abstract: A device for controlling current to a solid state lighting load includes a capacitor (241, 341) and a current source (245, 345). The capacitor is connected in a parallel arrangement with the solid state lighting load (260, 360). The current source is connected in series with the parallel arrangement of the capacitor and the solid state lighting load. The current source is configured to modulate dynamically an amplitude of an input current provided to the parallel arrangement of the capacitor and the solid state lighting load based on an input voltage.

Abstract: The present invention relates to an LED lamp (1) adapted for operation with an alternating current. The LED retrofit lamp (1) comprises a LED unit (7, 7?, 7?, 7??) and a compensation circuit with a controllable switching device (9, 9?), connected parallel to said LED unit (7, 7?, 7?, 7??) to provide an alternate current path. A control unit (10, 10?, 10?) is adapted to control said switching device (9, 9?) in a compensation mode in which said switching device (9, 9?) is set to the conducting state for the duration of a shunt period in each half cycle of the alternating current to allow adapting the power/current of the inventive LED lamp (1), so that a versatile and optimized operation of the lamp (1) is possible.

Abstract: The invention relates to a LED circuit arrangement (1) with at least a voltage input (4), adapted to provide an operating voltage, a reactive element (6) connected in series with said voltage input (4) and a LED light source (3). To enable the LED circuit arrangement (1) to be driven at an operating voltage, the LED light source (3) comprises a first and a second LED unit (8, 9), each having one light emitting diode, controllable switching means (10) to connect said LED units (8, 9) with said reactive element (6) in a low voltage mode and a high voltage mode and a control unit (12). The LED light source (3) shows a first forward voltage in said low voltage mode and a second forward voltage in said high voltage mode, said second forward voltage being higher than said first forward voltage.

Abstract: A Power-over-Ethernet (PoE) device (200) for use in a PoE system is described. The PoE device (200) comprising a first PoE port (210) for connecting the device to an upstream PoE device or a central control unit, a second PoE port (220) for connecting the device to a downstream device or PoE device and a control unit (240) for controlling data (335) and/or power communication (400) between the first (210) and second (220) PoE port. The control unit (240) further comprises a first power input terminal (305) connected to the first PoE port (210) to receive electrical power (320) for powering the control unit (240).

Abstract: This invention relates to a lighting device comprising a light transmissive light outlet unit (102), and light emitting diodes (104) generating light which is emitted through the light outlet unit. The lighting device further comprises a conductive layer structure (114), which is arranged as a coating on a portion of an inner surface of the light outlet unit. The light emitting diodes are mounted on and electrically connected with the conductive layer structure.

Abstract: The invention relates to lighting devices (100) for producing ultimate light comprising first light of a relatively warm color and second light of a relatively cool color. The lighting devices (100) comprise first and second circuits (1, 2) for producing the first and second light, third circuits (3) for reaching a temperature per intensity state of the ultimate light, and fourth circuits (4) thermally coupled to the third circuits (3) and comprising temperature-dependent circuits for giving the ultimate light a, for example, relatively warm color at lower intensity states and for giving the ultimate light a, for example, relatively cool color at higher intensity states.

Abstract: There is provided a housing comprising an electrically powered device and electrical connecting means. The (electrical connecting means of the) housing fit an interface means of an electrical power supply. The housing is provided with magnetically activable switching means which in a passive isolation state are open. The magnetically activable switching means prevent an electric current from passing between the electrical connecting means and the electrically powered device. The interface means comprise magnetic activation means enable an electric current to pass between the electrical connecting means and the electrically powered device when the housing has been properly installed.

Abstract: The invention describes an AC-LED lighting circuit (1) comprising an AC-LED arrangement (10) with at least a first set (11) of LEDs connected according to a first polarity and a second set (12) of LEDs connected according to the opposite polarity, which AC-LED lighting circuit (1) is characterized by (i) a source (61) of a polarity-selectable DC input signal (51) to be applied to the AC-LED arrangement (10), or a connecting means (40) for connecting the AC-LED lighting circuit (1) to a fixed-polarity DC input signal (50) and a conversion means (T1, T2, T3, T4) for converting the fixed-polarity DC input signal (50) to a polarity-selectable DC signal (50?) to be applied to the AC-LED arrangement (10); and (ii) a polarity controller (70, 71) realized to control the polarity of the polarity-selectable DC signal (50?, 51) applied to the AC-LED arrangement (10) such that the first set (11) of LEDs of the AC-LED arrangement (10) is driven when the polarity-selectable DC signal (50?, 51) has the first polarity, and t

Abstract: In a lighting device (100) comprising an AC light source (14) and a cooling arrangement (52, 62) and a coil (11) for producing a magnetic field for driving the arrangement (52, 62), the coil (11) is serially coupled to the AC light source (14) for making the lighting device (100) more compact. The arrangement (52, 62) comprises a moveable part for displacing a quantity of air or another gas or a fluid. Preferably, the lighting device (100) comprises a further coil (21) for producing a further magnetic field for further driving the arrangement (52, 62), and a phase-shift is introduced between currents flowing through the coil (11) and the further coil (21). The AC light source (14) comprises a combination of a rectifier and a light emitting diode and/or comprises a combination of at least two light emitting diodes combined in an anti-parallel manner.

Abstract: Information technology is becoming more and more present in illumination applications, such as lighting devices. To limit the installation effort and cost of such illumination applications lighting devices compliant with the Power over Ethernet can be used. There is provided a lighting device which is powered via Power over Ethernet and where the driver of the lighting device is directly compatible with the Power over Ethernet standard. With such an internal Power over Ethernet driver, the power delivered to the light source of the lighting device can be influence gradually, thereby allowing the light source to operate at a different power level instead of shutting the light source down completely.

Abstract: The invention relates to a driver device for a load (11), particularly an LED/OLED unit (12; 20, 22), comprising a shunting switch (30) parallel to the load, a control unit (14, 26) for controlling the shunting switch (30), an energy storage element (40) adapted to supply energy to at least the control unit (14, 26), and a recharge control circuitry (46) arranged in series with the energy storage element (40), the series connection of energy storage element (40) and recharge control circuitry (46) being provided parallel to the shunting switch (30), wherein said control unit (14, 26) is adapted to activate said recharge control circuitry (46) and to switch said shunting switch (30) off, when said energy storage element (40) is to be recharged. The invention also relates to a method of driving a load (11).

Abstract: The invention relates to an LED lamp (1, 1?, 1?, 1??, 1??) comprising at least one light emitting diode (LED, 2) arranged in a housing (3), and an isolation monitoring device (4) configured to determine a defect of the housing (3) and disconnect said at least one LED (2) from power in case said defect is detected, to enhance the safety of the LED lamp (1, 1?, 1?, 1??, 1??) and reduce the risk of electric shock for a user.

Abstract: The invention provides a lighting unit (1) comprising a light source (20) and an actuator (40). The light source (20) is arranged to generate, during use, a light beam (B) whose light intensity is dependent upon an electrical power signal (I; V). The actuator (40) is arranged to orient, during use, the light beam (B) in an orientation dependent upon the electrical power signal (I; V). The orientation of the light beam has a pre-determined relationship to the light intensity of the light beam. The invention further relates to a lighting system (100) comprising at least one lighting unit, a space (1000) comprising such a lighting system, and a use of such a lighting system.