Abstract: The invention relates to a peripheral device for communicating with a host and for controlling a controlled device, to a system including such peripheral device and at least the controlled device and to a corresponding method including a communication and a controlling. In order to allow for a possibility for upgrading controlled devices with further functionality during their service life at low initial costs or efforts on the side of the controlled devices, it is provided for an interconnection between a portion of the system using a complex standard and another portion of the system not using such standard by means of the peripheral device having a dual purpose, as a peripheral device to the standard compliant host and as a controlling device to the controlled device. In both cases, however, power is provided to the peripheral device from either the host or from the controlled device.

Abstract: An AC input power converter comprising a rectifier circuit (D3, D4, D5, D6) for rectifying an AC input signal, a first unidirectional device (D1) coupled in series with a first capacitor (C1) for charging the first capacitor (C1) and wherein the first unidirectional device (D1) and the first capacitor (C1) are arranged in parallel to an output of the rectifier circuit (D3, D4, D5, D6), a second unidirectional device (D2) coupled in series with a second capacitor (C2) for charging the second capacitor (C2) and wherein the second unidirectional device (D2) and the second capacitor (C2) are arranged in parallel to an output of the rectifier circuit (D3, D4, D5, D6), a first output (OUT1) for providing a first power and a first average voltage to a first power converter, wherein the first output (OUT1) s coupled to a first node between the first capacitor (C1) and the first unidirectional device (D1) and a second output (OUT2) for providing a second power and a second average voltage to a second power converter,

Abstract: An AC/DC converter and conversion method are provided, in which an AC input is rectified and shaped by a waveform shaping capacitor. A current source circuit is used to provide the output current to the output load which has a parallel bulk capacitor. The current source circuit is switched on and off with timing which is dependent on the phase of the AC input signal. This enables a relatively high power factor, for example between 0.7 and 0.9, with low cost circuitry with few components.

Abstract: An AC input power converter comprising a rectifier circuit (D3, D4, D5, D6) for rectifying an AC input signal, a first unidirectional device (D1) coupled in series with a first capacitor (C1) for charging the first capacitor (C1) and wherein the first unidirectional device (D1) and the first capacitor (C1) are arranged in parallel to an output of the rectifier circuit (D3, D4, D5, D6), a second unidirectional device (D2) coupled in series with a second capacitor (C2) for charging the second capacitor (C2) and wherein the second unidirectional device (D2) and the second capacitor (C2) are arranged in parallel to an output of the rectifier circuit (D3, D4, D5, D6), a first output (OUT1) for providing a first power and a first average voltage to a first power converter, wherein the first output (OUT1) s coupled to a first node between the first capacitor (C1) and the first unidirectional device (D1) and a second output (OUT2) for providing a second power and a second average voltage to a second power converter,

Abstract: An AC/DC converter and conversion method are provided, in which an AC input is rectified and shaped by a waveform shaping capacitor. A current source circuit is used to provide the output current to the output load which has a parallel bulk capacitor. The current source circuit is switched on and off with timing which is dependent on the phase of the AC input signal. This enables a relatively high power factor, for example between 0.7 and 0.9, with low cost circuitry with few components.

Abstract: A lighting device (100) and a method of manufacturing a lighting device, wherein the lighting device comprises at least one light source (110) arranged to generate light. The lighting device further comprises a light-transmissive envelope (120) enclosing the at least one light source and being arranged to transmit the light generated from the light source. The lighting device further comprises a driver unit (130) arranged for electrical supply to the at least one light source, the driver unit comprising a primary driver circuit (140) connectable to an electric energy source, at least one secondary driver circuit (150) connected to the at least one light source, and a transformer (160) arranged to transfer electrical energy between the primary driver circuit and the at least one secondary driver circuit, wherein at least the transformer and the at least one secondary driver circuit driver unit are arranged within the envelope.

Abstract: The invention relates to a peripheral device for communicating with a host and for controlling a controlled device, to a system including such peripheral device and at least the controlled device and to a corresponding method including a communication and a controlling. In order to allow for a possibility for upgrading controlled devices with further functionality during their service life at low initial costs or efforts on the side of the controlled devices, it is provided for an interconnection between a portion of the system using a complex standard and another portion of the system not using such standard by means of the peripheral device having a dual purpose, as a peripheral device to the standard compliant host and as a controlling device to the controlled device. In both cases, however, power is provided to the peripheral device from either the host or from the controlled device.

Abstract: Arrangements (1) for buffering energy comprise buffer capacitor circuits (10) with one or more buffer capacitors (11), first circuits (20) for guiding charging currents for charging the buffer capacitor circuits (10), and second circuits (30) with current source circuits (31-34) for defining amplitudes of de-charging currents for de-charging the buffer capacitor circuits (10), to better control the de-charging of the buffer capacitor circuits (10). The second circuits (30) may further comprise trigger circuits (51-53) for bringing the current source circuits (31-34) into activated modes, and latch circuits (61-63) for latching the current source circuits (31-34). The arrangements (1) may further comprise smoothing capacitor circuits (40) with one or more smoothing capacitors (41). The buffer capacitor circuits (10) may be coupled serially to the first circuits (20), and the first and second circuits (20, 30) may be coupled in parallel to each other.

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: A lighting device (100) and a method of manufacturing a lighting device, wherein the lighting device comprises at least one light source (110) arranged to generate light. The lighting device further comprises a light-transmissive envelope (120) enclosing the at least one light source and being arranged to transmit the light generated from the light source. The lighting device further comprises a driver unit (130) arranged for electrical supply to the at least one light source, the driver unit comprising a primary driver circuit (140) connectable to an electric energy source, at least one secondary driver circuit (150) connected to the at least one light source, and a transformer (160) arranged to transfer electrical energy between the primary driver circuit and the at least one secondary driver circuit, wherein at least the transformer and the at least one secondary driver circuit driver unit are arranged within the envelope.

Abstract: A lighting system (1) comprises a power unit (20) for producing data-modulated current, and a light unit (10) receiving this current at its input and output terminals (11, 12). The light unit comprises two or more light modules (100A; 100B; 100C) connected in series. Each light module comprises: a LED string (110) of one or more LEDs (111, 112, 113) connected between module input and output terminals (101, 102), each LED having an associated controllable shunt switch (121, 122, 123) connected in parallel thereto; a module controller (190) for controlling the shunt switches, the module controller (190) having a input terminals (191, 192) connected to said module input and output terminals, respectively. The module controller demodulates the data and controls the switches on the basis of an action command contained therein, if an address information contained therein matches the unique controller address.

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: The invention relates to an illumination device for embedding data symbols of a data signal into a luminance output of the illumination device. The device includes a LED comprising at least two segments which have a common electrode and are individually controllable. The LED is configured to generate the luminance output in response to a drive signal. The device further includes a controller configured for switching one of the segments on or off in response to the data signal to embed data symbols of the data signal into the light output of the device. One advantage of such an approach is that the proposed device is compatible with conventional LED drivers since no additional electronics for modulating the drive signal are necessary, which enables simple implementation and reduced costs.

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: In various embodiments a device and method for providing power to an LED unit and modulating light emitted from the LED unit is disclosed. In one example, the device is configured to be connected between a driver and the LED unit. In this example, the device comprises a controllable resistor that receives from the driver a driver output voltage and to provides a load current to power the LED unit, a frequency filter for providing a substantially constant voltage to the LED unit, the frequency filter being connected to the controllable resistor to provide a substantially constant electrical power to the LED unit, and a modulator coupled in series to the LED unit for modulating the drive current and for modulating the emitted light output, wherein the substantially constant voltage applied to the LED unit is further applied to the modulator by means of the frequency filter.

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: Arrangements (1) for buffering energy comprise buffer capacitor circuits (10) with one or more buffer capacitors (11), first circuits (20) for guiding charging currents for charging the buffer capacitor circuits (10), and second circuits (30) with current source circuits (31-34) for defining amplitudes of de-charging currents for de-charging the buffer capacitor circuits (10), to better control the decharging of the buffer capacitor circuits (10). The second circuits (30) may further comprise trigger circuits (51-53) for bringing the current source circuits (31-34) into activated modes, and latch circuits (61-63) for latching the current source circuits (31-34). The arrangements (1) may further comprise smoothing capacitor circuits (40) with one or more smoothing capacitors (41). The buffer capacitor circuits (10) may be coupled serially to the first circuits (20), and the first and second circuits (20, 30) may be coupled in parallel to each other.

Abstract: In various embodiments a device and method for providing power to an LED unit and modulating light emitted from the LED unit is disclosed. In one example, the device is configured to be connected between a driver and the LED unit. In this example, the device comprises a controllable resistor that receives from the driver a driver output voltage and to provides a load current to power the LED unit, a frequency filter for providing a substantially constant voltage to the LED unit, the frequency filter being connected to the controllable resistor to provide a substantially constant electrical power to the LED unit, and a modulator coupled in series to the LED unit for modulating the drive current and for modulating the emitted light output, wherein the substantially constant voltage applied to the LED unit is further applied to the modulator by means of the frequency filter.

Abstract: A circuit arrangement (3) is provided for operating at least one low-power lighting unit with a power supply (4) and in particular with a self-oscillating power supply. The circuit arrangement (3) comprises at least an input (12) for receiving an operating voltage (28) from said power supply (4) and an output (11) for connection to one or more low-power lighting units. To allow an efficient operation of said low-power lighting unit with the power supply (4), the circuit (3) comprises a pulse generator (17), connected with said input (12) and adapted to inject at least one trigger pulse (40a, 40b) into said power supply (4) during operation.