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: The invention relates to a drive unit for a lighting element and an operating method for such drive unit and to a lighting element including such drive unit. By selectively providing power to a control unit of the drive unit using different voltages at different stages of the overall drive unit, there is an additional degree of freedom which may be used for improving power efficiency, in particular for reducing standby power consumption, while still meeting specific space and cost constraints.

Abstract: A detection circuit is configured to detect the presence of an operating dimmer arranged to dim a lamp. The detection circuit includes a first circuit for measuring at a first frequency an impedance at a coupling arranged to carry a possibly dimmed feeding signal for the lamp. The first frequency is higher than the mains frequency of the mains which supplies the possibly dimmed feeding signal for the lamp. The first circuit provides a first output signal indicating the measured impedance at the first frequency. The detection circuit also includes a second circuit for analyzing the first output signal and providing a second output signal indicating whether the operating dimmer is present. The second output signal indicates that the operating dimmer is present if the measured impedance changes by at least a defined minimum deviation within a defined time interval.

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 (12) 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: The invention relates to a light emitting device system (112) comprising power supply terminals (114) and a remote control signal receiver (118), the power supply terminals being adapted for receiving electrical power from an external driver (100), the remote control signal receiver (118) being adapted for receiving a remote control signal, wherein the light emitting device system (112) is further adapted for providing the received remote control signal as remote control signal information exclusively via the power supply terminals (114) and/or via wireless transmission to the driver (100).

Abstract: A system comprising a driver circuit wherein the driver circuit comprises a converter. The system further comprises a controller operable to control a ratio between an input voltage supplied to the driver circuit and a target output voltage to be output from the driver circuit by varying a pulse width modulated signal, and by switching between operating modes of said converter. The controller is configured to determine that the driver circuit is operating in an undesired state caused by a combination of the duty cycle and the operating mode of the converter. The system further comprises a resistance adjustment circuit configured to adjust an equivalent output resistance of the driver circuit in response to the controller determining that the driver circuit is operating in an undesired state.

Abstract: The present invention relates to a driver device for driving a load, in particular an LED unit having one or more LEDs, comprising input terminals for receiving an input voltage from an external power source for powering the load, and a connection unit for connecting the input terminals to each other and for providing a current path for a bleeding current, wherein the connection unit comprises 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, wherein the connection unit comprises a first current control unit for controlling the bleeding current in the connection unit, and wherein the first and the second current path each comprises a second current control unit for controlling the bleeding current in the respective current path.

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 present invention relates to a driver device and a corresponding driving method for driving a load (22), in particular an LED unit, said driver device comprising power input terminals (51, 52) for receiving a periodic supply voltage from an external power supply potentially including a dimmer for dimming said periodic supply voltage, power output terminals (53, 54) for providing a drive voltage and/or drive current for driving a load (22), a power stage (70a, 70b, 70c, 70d) coupled between the power input terminals and the power output terminals for controlling an input current received from said power input terminals to draw a high power from said external power supply in a first mode or to draw a low or no power from said external power supply in a second mode, said high power being higher than the power required for driving said load and said low power being lower than the power required for driving said load, wherein said power stage controls said input current to be in the second mode only for a perc

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: 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: 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: The invention describes a driver arrangement (1) for driving a semiconductor lighting load (2), which driver arrangement (1) comprises a first power converter (10) arranged to drive a portion (2_10, 2_10_11) of the lighting load (2); a second power converter (11) arranged to drive a portion (2_11, 2_10_11) of the lighting load (2); a monitoring arrangement (12) realized to monitor an operating characteristic (12A, 12B, 12C, IR30)° f the second power converter (11); and a control signal generator (13) for generating a control signal (130, Vshunt) for the first power converter (10) on the basis of the monitored operating characteristic (12A, 12B, 12C, IR30). The invention also describes a lighting arrangement (100), which lighting arrangement (100) comprises a semiconductor lighting load (2); and such a driver arrangement (1) for driving the semiconductor lighting load (2). The invention also describes a method of driving a semiconductor lighting load (2).

Abstract: The invention relates to a lighting system comprising: —a substrate comprising a resistive sheet (RS) comprising multiple electrodes (A, B, C, D), each electrode being suitable for connection to a respective voltage source, —a plurality of lighting elements (LEI, LE2, LE3, LE4), each element comprising a light source (LED) and at least two contact pins (CP1, CP2) for electrical connection to respective electrical connection terminals and a control circuit for controlling the light output and/or the color of the light generated by the light source in dependence on the voltage between the contact pins, wherein the electrical connection terminals are distributed over the resistive sheet such that the lighting elements can be connected in different positions and in different orientations, wherein the voltage present between the contact pins depends on the position and orientation of the lighting element and wherein the light output and/or the color of the light generated by the lighting element depends on the mag

Abstract: The invention relates to a method and a lighting device for generating light. The lighting device has at least one light source connected to two receiving-electrodes, at least two supply-electrodes for generating an electrical field, wherein the relative configuration between the receiving-electrodes and the electrical field can change. Such a change may, for example, come about by a movement of the receiving-electrodes relative to the electrical field and/or by changing the configuration of the electrical field. The light source and/or the receiving-electrodes may be embedded in a non-solid filling of a container. Thus three-dimensional structures of light sources can be designed in which the light sources may optionally be movable.

Abstract: Adaptation circuits (1) allow discharge lamps to be replaced by light circuits (45) with light emitting diodes, while keeping ballast circuits (8) designed for connection to the discharge lamps. The adaptation circuits (1) comprise conversion circuits (2) for converting input voltage and current signals coming from the ballast circuits (8) into output voltage and current signals destined for the light circuits (45). The conversion circuits (2) reduce amplitudes of the input voltage signals to values below predefined values during predefined time intervals after energy from the ballast circuits (8) has been transferred to the conversion circuits (2). The time intervals are synchronized with periods of the input voltage signals. Between first draining states for draining energy and second releasing states for releasing the energy, third states such as holding states for holding the energy have been introduced.

Abstract: The invention relates to a drive unit for a lighting element and an operating method for such drive unit and to a lighting element including such drive unit. By selectively providing power to a control unit of the drive unit using different voltages at different stages of the overall drive unit, there is an additional degree of freedom which may be used for improving power efficiency, in particular for reducing standby power consumption, while still meeting specific space and cost constraints.

Abstract: A short detection circuit is provided for detecting a short circuit condition of an LED. A voltage threshold is set which is dependent on the LED operating current, such that there are at least two different voltage thresholds at two different LED operating currents. This means false detections can be reduced and the LED current operating range can be increased over which the short detection functions.

Abstract: The present invention relates to a power control unit (40; 60) for controlling electrical power provided to a load (12), in 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: 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).