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 present invention relates to a driver device (50) for driving a load (12), in particular an LED unit (12) having one or more LEDs (54), comprising input terminals (28, 29) for receiving an input voltage (V12) from an external power source (16) for powering the load (12), and a connection unit (66) for connecting the input terminals (28, 29) to each other and for providing a current path (74, 76) for a bleeding current (12), wherein the connection unit (66) comprises a first current path (74) for connecting the input terminals (28, 29) in a first current direction and a second current path (76) for connecting the input terminals (28, 29) in a second current direction opposite to the first current direction, wherein the connection unit (66) comprises a first current control unit (72) for controlling the bleeding current (12) in the connection unit (66), and wherein the first and the second current path (74, 76) each comprises a second current control unit (80, 82) for controlling the bleeding current (12) i

Abstract: The present invention relates to a data generating system comprising a memory device (302), which comprises memory cells (306, 308) and a cell content access unit (310) arranged to access content in the memory cells and provide corresponding output data, wherein the output data originating from at least one of the memory cells (306) is changeable by means of an external physical effect acting directly on the memory device.

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: Drivers (2) comprise converters (21) for converting input signals from dimmers (1) into output signals destined for light emitting diode circuits (3) and controllers (22) for detecting dimming levels of the input signals and for bringing the drivers (2) from first, normal dimming modes into second, eco dimming modes in response to detection results defining the dimming levels being equal to/smaller than threshold levels. In the first/second dimming modes, the first input signals are converted into first/second output signals according to first/second curves (I, II). The second curves (II) define higher light outputs than the first curves (I) for most of the dimming levels. Dimmers (1) comprise indicators (11, 2, 13) for indicating to users the dimming levels of the input signals being equal to/smaller than the threshold levels. The indicators (11, 12, 13) may comprise light emitting diode 10 apparatuses (11), mechanical clicks when turning knobs (12) and markers or markings (13) on the dimmer.

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: A driver device for driving a load, in particular an LED unit having one or more LEDs. The driver device includes input terminals for receiving an input voltage from an external power source and a polarity-dependent unit for connecting the input terminals to each other and for providing a current path dependent on the polarity of the input voltage. The polarity-dependent unit includes a first current path for connecting the input terminals in a first current direction and a second current path for connecting the input terminals in a second current direction opposite to the first current direction. The first and the second current path each comprise a current control unit for controlling a bleeding current in the respective current path and diodes for blocking the bleeding current in the respective current path in a reverse direction opposite to the respective current direction.

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: Detection circuits (1, 2) for detecting presences of operating dimmers arranged to dim lamps (14) comprise first circuits (1) for measuring impedances at couplings (12) arranged to carry possibly dimmed feeding signals for the lamps (14). The first circuits (1) provide first output signals defining the measured impedances that comprise impedances at frequencies larger than mains frequencies. The detection circuits (1, 2) further comprise second circuits (2) for analyzing the first output signals. The second circuits (2) provide second output signals defining the operating dimmers being present or not. The impedance may be measured several times per time-interval. A change in the measured impedance of a certain minimum deviation or more within the time-interval may be indicative for the presence of an operating dimmer. The second circuits (2) may comprise filters (21), averaging circuits (22), threshold circuits (23), comparators (24) and controllers (25).

Abstract: The invention relates to a dimmable LED light source comprising:—a rectifier having rectifier input terminals for connection to respective output terminals of a phase cut dimmer of the trailing edge type, input terminals of the phase cut dimmer being connected to the mains supply, and having rectifier output terminals,—a first bleeder circuit connecting the rectifier output terminals, —a series arrangement comprising a unidirectional element and a capacitive means connecting the rectifier output terminals, —a converter circuit, having input terminals coupled to respective sides of the capacitive means and output terminals coupled to a LED load, for generating a current through the LED load, in dependence on a dim signal, out of a voltage present across the capacitive means, —a dim circuit for generating a dim signal as a function of the adjusted phase angle of the phase cut dimmer and for supplying the dim signal to a dim input of the converter circuit, the dim circuit comprising: —gradient detection circuitr

Abstract: A circuit arrangement for selective powering of distributed loads (D1-D7, 220-226, 213a-213e) is provided, comprising a plurality of load segments (10, 20, 30, 40, 50, 60, 70), each being electrically connected to at least one supply terminal al for receiving a variable voltage, wherein each load segment (10, 20, 30, 40, 50, 60, 70) comprises at least a load unit (D1-D7, 220-226, 213a-213e) and a proximity sensor unit (11), coupled with said load unit and comprising at least a reactive device (L1-L7, L1a-L7a, C1-C7, C1a-C7a, 214a-214e, 215d) having a reactance, said reactance depending on the proximity of a detection object (100, 102).

Abstract: The invention relates to a power distribution track system, in particular, to a DC power distribution track system, comprising a track (3) with position markers (17) representing positional information being indicative of the respective longitudinal position. The system further comprises an electrical device like a luminair connected to the track (3) at a longitudinal position, wherein the electrical device comprises a reading unit for reading out the positional information represented by the position marker at the longitudinal position at which the electrical device is connected. Since the reading unit reads out the positional information at the respective longitudinal position represented by the respective position marker, positional information can be provided, which can be used for automatically determining the longitudinal position of the electrical device, especially without requiring an installer installing the electrical device to determine the position of the electrical device.

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: To avoid clock signals and to separate power wiring from control wiring in a driver, and to avoid three-terminal light emitting diodes with control electrodes, a driver for driving light emitting diode circuits (10, 20, 30) is provided with first and second terminals (1, 2) for receiving a voltage signal from a source (5) and with a first switching circuit (11, 2) coupled to the second terminal (2) and to a third terminal (3). The first and the third 5 terminal (1, 3) are to be coupled to electrodes of a first light emitting diode circuit (10). The first switching circuit (11, 12) comprises a first switch (11) and a first timing circuit (12) for, in response to a first pulse signal as added to the voltage signal, activating the first switch (11) to switch on the first light emitting diode circuit (10). Sequential pulse signals may be used to sequentially switch on light emitting diode circuits (10, 20).

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 present invention relates to a method and apparatus for controlling data transfer and power supply to at least one load device (61-64) connected to a two-wire data communication cable (70) in a bus-type structure. Power supply and data transfer are multiplexed via the two-wire data communication cable so that a standard coaxial cable can be used for shared power and data transport, enabling the operation of lighting applications or other applications in retail and office, based on cheap, flexible, preconfigured cables in a bus topology and using known chipsets.

Abstract: The present invention relates to a driver device (10) for driving a load (14), in particular a light unit (14) having one or more light emitters, comprising input terminals for receiving an input voltage (V10) from an external power source (12), output terminals for providing electrical power to the load for powering the load (14), a driver stage (16) connected to the input terminals and to the output terminals, wherein the driver stage (16) is adapted to control an input current (I1) drawn from the external power supply (I2) and to control the electrical power provided to the output terminal shaving a predefined level, a detection device (24) for measuring at least one electrical parameter (V10, V12, I2, V20) of the driver stage (16) and for determining an input voltage deviation from predefined supply conditions on the basis of the electrical parameter (V10, V12, I2, V20), wherein the driver stage (16) is adapted to control the input current (I1) according to predefined conditions if the input voltage devia

Abstract: Devices comprise first and second terminals (1,2) connected to first load circuits (21) comprising first light emitting diodes, and third and fourth terminals (3, 4) connected to second load circuits (22) comprising second light emitting diodes, first connections (11) that interconnect the first and third terminals (1, 3), second connections (12) that interconnect the second and fourth terminals (2, 4), at least one of the first and second connections (11, 12) being a power dissipating connection, at least one of the first and second load circuits (21, 22) being adapted to receive first power from a source (31) via the first and second connections (11, 12), and capacitors (41) coupled in parallel to the second load circuits (22) for storing energy received via elements (42) with current-direction-dependencies and for providing second power to at least the second load circuit (22).

Abstract: The invention relates to embedding data symbols of a data signal into a luminance output of an illumination device. The device includes a controller configured for receiving a first base pattern and a second base pattern within a frame period, and generating a shifted second pattern by phase shifting the second base pattern within the frame period with respect to the first base pattern in response to the data signal such that the data symbols are embedded in the luminance output of the device. The device also includes a first light source configured to generate a first luminance output in response to the first base pattern and a second light source configured to generate a second luminance output in response to the shifted second pattern. The first and second luminance outputs have different output spectra and the luminance output of the illumination device comprises both the first and second luminance outputs.

Abstract: The invention relates to a LED lighting system comprising a power supply circuit and at least one LED module. The power supply circuit comprises input terminals (K1, K2) for connection to a supply voltage source and output terminals (K3, K4),and a driver circuit (I, II) coupled between the input terminals and the output terminals for generating a LED current out of a supply voltage supplied by the supply voltage source, and comprising a driver control circuit (II) with an input terminal (K7) for receiving a current control signal and for generating a LED current in dependency of the current control signal.