Abstract: A lighting device (10) for operating from a main power supply or from an auxiliary power supply (25), in co-operation with a switching device transmitting a wireless control signal indicative of a power condition of the main power supply. The lighting device (10) accommodates in a single housing (11) a light emitting module (20), the auxiliary power supply (25) and a control circuit (30) for monitoring the wireless control signal and a power condition of the main power supply at the lighting device (10). The control circuit (30) is to operate the lighting device from the auxiliary power supply if both the monitored power condition and the control signal indicate absence of power, and is to deactivate the powering from the auxiliary power supply (25) if the monitoring reveals presence of power of the main power supply.

Abstract: A lighting device (10) for operating from a main power supply or from an auxiliary power supply (25), in co-operation with a switching device transmitting a wireless control signal indicative of a power condition of the main power supply. The lighting device (10) accommodates in a single housing (11) a light emitting module (20), the auxiliary power supply (25) and a control circuit (30) for monitoring the wireless control signal and a power condition of the main power supply at the lighting device (10). The control circuit (30) is to operate the lighting device from the auxiliary power supply if both the monitored power condition and the control signal indicate absence of power, and is to deactivate the powering from the auxiliary power supply (25) if the monitoring reveals presence of power of the main power supply.

Abstract: The invention describes an LED lighting module (1) comprising input terminals (13hi, 13lo) for connecting to an input voltage (Uin); an LED load (10) realized to operate at an upper threshold voltage level (Vdim); and a regulation circuit (11, 12) realized to decrease LED current (ILED) through the LED load (10) when the input voltage (Uin) is greater than the upper threshold voltage level (Vdim). The invention further describes an LED lighting arrangement (4) and a method of driving an LED load (10).

Abstract: Control circuits (1) bring power converters (4) in different modes in response to detection results. The power converters (4) exchange possibly rectified first voltage/current signals with electronic halogen transformers (2) and supply second voltage/current signals to light emitting diode circuits (5). The first current signals have, in different modes, different amplitudes. The different amplitudes have different constant values and/or different derivative values. As a result, the first current signal has become a relatively varying first current signal. Then, the halogen transformers (2) no longer experience problems that occur when smaller amounts of power need to be provided than designed to. The detections may comprise polarity detections of and/or zero-crossing detections in the first voltage signals. The halogen transformers (2) comprise self-oscillating switched mode power supplies designed to provide first amounts of power at their outputs.

Abstract: The invention describes an LED lighting module (1) comprising input terminals (13hi, 13lo) for connecting to an input voltage (Uin); an LED load (10) realised to operate at an upper threshold voltage level (Vdim); and a regulation circuit (11, 12) realised to decrease LED current (ILED) through the LED load (10) when the input voltage (Uin) is greater than the upper threshold voltage level (Vdim). The invention further describes an LED lighting arrangement (4) and a method of driving an LED load (10).

Abstract: A light unit (10) is disclosed including a plurality of lighting devices (22, 24, 26), in particular a plurality of LEDs, for emitting light. The light unit comprises connection terminals (12, 14) for connecting the light unit to an external power supply (16) and for receiving an input voltage (V10) and/or an input current (IT) from the external power supply. A first current path (18) and a second current path (20) are connected to the connection terminals each comprising at least one lighting device, wherein the first current path and the second current path are connected in parallel to each other. The second current path has a controllable resistor (28) for controlling an electrical current I1 in the second current path and a current limiter (30) for limiting the current in the second current path.

Abstract: The present invention relates to a driver device (60) for driving a load (12), in particular an LED unit comprising one or more LEDs, said driver device comprising input terminals (28, 30) for receiving an input voltage (V12) from an external power supply (16), output terminals for providing an output voltage to the load (12) for driving the load (12), a converter unit (34) for converting the input voltage (VI 2) to a converted voltage (VI 4) and for providing the converted voltage (VI 4) to internal connection elements (63, 64) of the driver device (60), a signal control device (62) for applying an electrical signal (I) to at least one of the connection elements (63, 64), and a detection circuit for detecting a phase angle of the input voltage (VI 2) by measuring a voltage drop of the converted voltage (VI 4) caused by the electrical signal (I).

Abstract: A lighting device is configured to receive a first voltage signal, and includes: a first circuit coupled to input terminals for receiving the first voltage signal, the first circuit including: rectifying diodes for rectifying the first voltage signal and supplying a second voltage signal, a first capacitor for buffering the second voltage signal, and a second capacitor coupled in parallel to one of the rectifying diodes of the first circuit; a second circuit receiving an input voltage signal, corresponding to the second voltage signal, and converting the input voltage into an output signal; and a light circuit receiving the output signal of the second circuit and including at least one light emitting diode, wherein the first circuit includes a fourth circuit in parallel to the second capacitor, the fourth circuit including at least two fourth circuit diodes and being connected by a fourth capacitor to one of the input terminals.

Abstract: Control circuits (1) bring power converters (4) in different modes in response to detection results. The power converters (4) exchange possibly rectified first voltage/current signals with electronic halogen transformers (2) and supply second voltage/current signals to light emitting diode circuits (5). The first current signals have, in different modes, different amplitudes. The different amplitudes have different constant values and/or different derivative values. As a result, the first current signal has become a relatively varying first current signal. Then, the halogen transformers (2) no longer experience problems that occur when smaller amounts of power need to be provided than designed to. The detections may comprise polarity detections of and/or zero-crossing detections in the first voltage signals. The halogen transformers (2) comprise self-oscillating switched mode power supplies designed to provide first amounts of power at their outputs.

Abstract: The invention describes a low-power load arrangement (1) comprising a low-power load (3); a driver (2) for the low-power load (3); connectors (300) for connecting to an electronic transformer (2) realized for converting a mains power supply (4) to a power supply for a normal-power load (5); and a reverse current generating means (LP, SB) realized to provide a reverse current (Irev_LP, Irev_SB) to sustain self-oscillation during operation of the electronic transformer (2), wherein the direction of current flow of the reverse current (Irev_LP, Irev_SB) is opposite in direction to the output current of the electronic transformer (2).

Abstract: Determining an amount of light output from a solid state lighting (SSL) unit based on a dimmer setting includes determining the dimmer setting of the dimmer during a readout mode by analyzing a power signal received from the dimmer, the dimmer setting indicating a desired level of light, determining power needed at input terminals of the SSL unit for an SSL load to output the desired level of output light, and determining a value of an adjusting signal for adjusting the power at the input terminals of the SSL unit during a power reception mode, based at least in part on the determined dimmer setting, causing the SSL unit to output the desired level of light.

Abstract: Control circuits (1) bring power converters (4) in different modes in response to detection results. The power converters (4) exchange possibly rectified first voltage/current signals with electronic halogen transformers (2) and supply second voltage/current signals to light emitting diode circuits (5). The first current signals have, in different modes, different amplitudes. The different amplitudes have different constant values and/or different derivative values. As a result, the first current signal has become a relatively varying first current signal. Then, the halogen transformers (2) no longer experience problems that occur when smaller amounts of power need to be provided than designed to. The detections may comprise polarity detections of and/or zero-crossing detections in the first voltage signals. The halogen transformers (2) comprise self-oscillating switched mode power supplies designed to provide first amounts of power at their outputs.

Abstract: The present invention relates to a driver device (30) for driving a load (32), in particular an LED unit (32) having one or more LEDs, comprising input terminals (45) for receiving an input voltage (V14) from an external power source (12) for powering the load (32), a current path (46) including a controllable switch (50) for connecting the input terminals (45) to each other, a measurement path (48) including a resistor (56, 58, 84, 86) connecting the input terminals (45) to each other for providing an alternating voltage corresponding to the input voltage (V14) and including a measuring device (64, 70) for measuring the alternating voltage (V15) at the measurement path (48), and a controller (54, 62) for controlling the controllable switch (50) on the basis of the measured alternating voltage.

Abstract: The invention describes a low-power load arrangement (1) comprising a low-power load (3); a driver (2) for the low-power load (3); connectors (300) for connecting to an electronic transformer (2) realised for converting a mains power supply (4) to a power supply for a normal-power load (5); and a reverse current generating means (LP, SB) realised to provide a reverse current (Irev LP, Irev SB) to sustain self-oscillation during operation of the electronic transformer (2), wherein the direction of current flow of the reverse current (Irev_LP, Irev_SB) is opposite in direction to the output current of the electronic transformer (2).

Abstract: The invention relates to LED lighting system comprising a power supply circuit and one or more LED modules. The power supply circuit is equipped with input terminals (K1, K2) for connection to a supply voltage source and first and second output terminals (K3, K4), and a driver circuit (I, II) coupled between the input terminals and the first and second output terminals for generating a LED current. The driver circuit (I, II) comprises a driver control circuit (II) equipped with an input terminal (K7) for increasing or decreasing the LED current in dependency of a signal present at the input terminal of the driver control circuit.

Abstract: Circuits (1) for receiving output signals from transformers (2) comprise filters (11) and switches (12). In the case of magnetic/electronic transformers, the filters (11) are activated/deactivated, for example for filtering/not filtering unwanted signals coming from converters (4). The filters (11) may comprise capacitors. The switches (12) may comprise fuses. Output signals of magnetic/electronic transformers comprise relatively low/high frequency signals that result in relatively small/large currents flowing through the capacitors, which currents will not blow/blow the fuses. The capacitors, when activated, form, together with leakage inductances of the magnetic transformers, electromagnetic interference filters. Alternatively, the circuits (1) may further comprise detectors (13) for detecting transformer types and for controlling the switches (12) in response to detection results.

Abstract: A light unit (10) is disclosed including a plurality of lighting devices (22, 24, 26), in particular a plurality of LEDs, for emitting light. The light unit comprises connection terminals (12, 14) for connecting the light unit to an external power supply (16) and for receiving an input voltage (V10) and/or an input current (IT) from the external power supply. A first current path (18) and a second current path (20) are connected to the connection terminals each comprising at least one lighting device, wherein the first current path and the second current path are connected in parallel to each other. The second current path has a controllable resistor (28) for controlling an electrical current I1 in the second current path and a current limiter (30) for limiting the current in the second current path.

Abstract: Electrical device (30) for compensating an effect of an electrical current (IL) of a load (14; 34), in particular an LED unit having one or more LEDs, when the load is supplied via a phase cut dimmer, which is normally conceived for traditional filament lamps. The electrical device comprising a connection element (66) for electrically connecting the electrical device (30) to an external power source (12) providing a supply voltage (V 10) for powering the load (14;34), a monitoring device (46; 52) for monitoring the electrical current (IL) of the load (14;34) during a first time interval (Toff), and a signal controller (62, 64) connected to the connection element (66) for providing an electrical compensation signal (13) to the connection element (66) during a second time interval (TIR, TDC) on the basis of the electrical current (IL) monitored by the monitoring device (46; 52).

Abstract: 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 a first rectifier output terminal and a second rectifier output terminal, —a bleeder circuit connecting the rectifier output terminals, —a series arrangement comprising a first unidirectional element and first capacitive means connecting the rectifier output terminals, —a converter circuit, having input terminals coupled to respective sides of the first 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, —a series arrangement com

Abstract: The invention relates to a LED lighting system comprising a power supply circuit for supplying a LED current, equipped with input terminals (K1, K2) for connection to a supply voltage source and output terminals (K3, K4), modulation circuitry (MS, DC2), coupled between the output terminals, for alternately maintaining the voltage between the output terminals at a high level during a first time interval and a low level during a second time interval, a current sensor (R1, R2, S1) for sensing the current through the output terminals during the second time interval, and a driver circuit (DC1, DC2), coupled between the input terminals and the output terminals and coupled to the current sensor, for generating the LED current, out of a supply voltage supplied by the supply voltage source, wherein the LED current equals the current sensed by the current sensor multiplied by a predetermined constant multiplication factor and for supplying the LED current to the output terminals during each first time interval.