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 invention relates to a DC power distribution system for distributing DC power from a power supply device (3) to an electrical device (2). The power supply device is operable in a high power mode or in a low power mode for supplying a higher power or a lower power, respectively, to the electrical device via an electrical conductor (4), wherein the electrical device is switchable between a high power mode and a low power mode in which the electrical device consumes more power or less power, respectively. An electrical device control unit (11) controls the mode of the electrical device depending on the power supplied by the power supply device. This automatic control of the electrical device depending on the provided power can lead to a better balance between the power consumption and the power supply and, thus, to an improved efficiency of supplying power to the electrical device.

Abstract: The invention relates to a DC power distribution system for distributing DC power to one or several electrical devices. The system comprises an electrical device (2) for receiving DC power via an electrical conductor (4) from a power supply device (3) with a power supply control unit (5) and for transmitting a signal to the power supply control unit for requesting a lower power or a higher power. The power supply device is operable in a high power mode and in a low power mode, wherein the power supply control unit controls the power mode of the power supply device depending on the received signal. This allows adapting the power supply to the power, which is actually really needed in the DC power distribution system, in a technically relatively simple way. Particularly standby situations can be handled more efficiently.

Abstract: The invention relates to an electrical connector (1) for connecting an electrical device to an electrical conductor (3) for powering the electrical device with DC voltage. The electrical connector comprises a diagnostic information providing unit for providing diagnostic information about a connection between the electrical device and the electrical conductor and an indicator for indicating the determined diagnostic information. An installer can therefore readily see whether the electrical connection is correct or not. Accordingly, the installer can modify the electrical connections such that the indicated determined diagnostic information indicates a correct electrical connection. This reduces the likelihood of a shutdown of the powering of the electrical device with DC voltage, after the installation has been completed.

Abstract: The invention relates to a power supply device (3) for supplying power to an electrical consumer (2) having a variable power consumption in a power distribution system (1), particularly in a DC power distribution system for lighting applications, wherein the power supply device (3) is output current controlled and is adapted to provide the output current depending on the power consumed by the electrical consumer (2). Since the output current is not constant, but controlled depending on the power consumed by the electrical consumer (2) being preferentially a lamp, the output current can be adapted to the actually consumed power, thereby allowing for an improved efficiency of distributing the power in the power distribution system (1). In particular, if less power is consumed by the electrical consumer (2), a lower output current can be provided, thereby reducing losses in cables and electrical connectors of the power distribution system.

Abstract: The present invention relates to a bidirectional semiconductor switch (M1, M2) with extremely low control power consumption and a bootstrap circuit which allows reliable start of operation of the switch and the hosting device after unlimited duration of mains interruptions. Intelligent control options are provided by operating from a small energy storage and no extra means are required to recover from a depleted energy storage condition. The absence of audible noise and mechanical wear also enables more frequent recharging cycles and allows smaller and thus cheaper energy storage components.

Abstract: Disclosed is a lighting device including a circuit including at least two parallel-connected light-emitting diodes of opposite pole in a first parallel branch and comprising at least two parallel-connected light-emitting diodes of opposite pole in a second parallel branch, and also including a capacitor and a coil. At least one of the diodes emits red light, blue light, and/or white light.

Abstract: The present invention relates to a method and apparatus for disconnecting a bias current circuitry (140) in a way that there is no bias current flowing anymore for the transmit output of a network controller (110), e.g. Ethernet controller. Also, the data connection, e.g., TX+ and TX? lines in or at an Ethernet connector (120), are connected to a control circuitry (130) to simulate an active connection by taking over supply of link activation pulses, e.g., link integrity test (LIT) pulses. These two measures will allow the user to save the bias current on the transmit output and maintain the link activation signals to keep the link up towards a network controller (110).

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: An arrangement includes a voltage input, a reactive element connected in series with the voltage input, and an LED light source. The LED light source includes a first LED unit and a second LED unit, each having at least one LED, a controllable switching device to connect the LED units with the reactive element in a low voltage mode and a high voltage mode, and a control unit. The LED light source has a first, higher, forward voltage in the low voltage mode and a second, lower, forward voltage in the high voltage mode. The control unit controls the current through the LED light source by setting the switching device to the low voltage mode when the current, supplied to the LED light source, corresponds to a first threshold value, and by setting the switching device to the high voltage mode when the current corresponds to a second threshold value.

Abstract: The invention relates to an electrical connector for connecting an electrical device to an electrical conductor (3) for powering the electrical device (9) with DC voltage. The electrical connector (1) comprises an arrangement information providing unit for determining arrangement information being information about the arrangement of the electrical connector on the electrical conductor and an indicator (7) for indicating the provided arrangement information Since the arrangement information is provided and indicated, a user like an installer can easily see how the respective electrical connector is arranged on the electrical conductor, in particular, with respect to other electrical connectors. Specifically, if several electrical connectors are present, arrangement information can be provided for the several electrical connectors. This allows the user to easily obtain an overview of components of a DC power distribution system.

Abstract: The invention relates to an overload detection device (1) for detecting an overload condition in a DC system (5) comprising a DC voltage source (4) and several electrical devices (8, 9, 10) electrically connected to the DC voltage source. The overload detection device comprises an overload detection unit for detecting the overload condition and a reducing unit for reducing the power consumed by an electrical device of the several electrical devices, if the overload detection unit detects the overload condition. Since the overload detection device reduces the power consumed by an electrical device of the several electrical devices, if the overload detection unit detects the overload condition, the overload condition may be removed, without requiring manual intervention. This allows for an improved recovery of the DC system.

Abstract: The invention provides a lighting unit comprising a substantially continuous, pliable surface (10) and a plurality of light sources. The light sources (20) are arranged to generate light beams (24) with respective optical axes (O). Each of the light sources (20) is connected to the pliable surface (10) at respective surface areas (30) of the pliable surface (10), whereby orientations of the respective surface areas (20) and orientations of the respective optical axes (O) are linked. The pliable surface (10) has a profile (Z) that is pliable into different profiles with corresponding different orientations of at least part of the plurality of surface areas (30). The lighting unit can thus easily provide different illumination profiles. In this way, a flexible lighting unit is provided, as the profile of the pliable surface can be defined and, after having been initially defined, also changed in dependence on e.g. user needs.

Abstract: Driver arrangements (1) comprise division circuits (100) with division inputs (101-102) for receiving input signals and division outputs (111-118) for supplying output signals to light sources (301-308). The division circuits (100) convert respective first and second input signals of a plurality of input signals into respective first and second parts of a further plurality of output signals. The driver arrangements (1) further comprise driver circuits (200) for driving the light sources (301-308) via the division circuits (100). The driver circuits (200) have driver outputs (201-202) for supplying the input signals to the division inputs (101-102). Such driver arrangements (1) no longer require a switch per light source (301-308). The plurality is preferably equal to or larger than two and smaller than the further plurality, and at least some of the first and the second parts are mutually different in size, amplitude or absolute value.

Abstract: The invention relates an electrical device for providing an output depending on an electrical input. The electrical device (1) is adapted to provide a constant output, if the electrical input is in a first electrical input range, and a dependent output, if the electrical input is in a second electrical input range, wherein the dependent output depends on the electrical input. The output can therefore remain constant, even if the electrical input, which is preferentially a DC grid voltage, fluctuates within the first electrical input range. Moreover, in the second electrical input range the output can be controlled by just controlling the electrical input like the DC grid voltage, without necessarily requiring an additional control construction of the electrical device. A resistance against fluctuations of the electrical input and a controllability of the output can therefore be realized in a relatively simple way.

Abstract: An apparatus coupling a power source to a light emitting diode lamp includes a first part for receiving first voltage and current signals from the power source and a second part for supplying second voltage and current signals to the lamp. The first part includes a detection part for detecting a first amplitude reduction in at least one of the first signals, for example in the first voltage signal, and the second part includes an introduction part for, in response to a detection result, introducing a second amplitude reduction into at least one of the second signals, for example into the second current signal. As a result, the first part detects a first dimming state caused by the power source, and the second part introduces a second dimming state in response to the first part having detected the first dimming state, and the apparatus has self-dimming capabilities, to keep the grid stable.

Abstract: An apparatus coupling a power source to a light emitting diode lamp includes a first part for receiving first voltage and current signals from the power source and a second part for supplying second voltage and current signals to the lamp. The first part includes a detection part for detecting a first amplitude reduction in at least one of the first signals, for example in the first voltage signal, and the second part includes an introduction part for, in response to a detection result, introducing a second amplitude reduction into at least one of the second signals, for example into the second current signal.

Abstract: The present invention relates to an illumination device comprising at least one light source and a reflector system forming a spotlight (1), one or several actuators (5) arranged to pivot the spotlight (1) relative in a mounting base (4) for varying an illumination angle, and a camera (13) attached to the spotlight (1) and aligned to acquire images of an illumination region (7) to which the spotlight (1) is directed. The spotlight (1) is designed to comprise a central region from which the illumination region (7) is visible and which does not reflect or emit light of the light source towards the illumination region (7), wherein the camera (13) is arranged in said central region on an optical axis (14) of the spotlight (1). With the proposed illumination device an exact aiming of the spotlight (1) can be achieved even in applications in which the illuminated region (7) is close to the spotlight (1) without causing undesired shadows in the illumination region (7).

Abstract: The invention provides a lighting system (1) comprising a plurality of elements (10) adjustably connected to a plurality of supports (11) arranged on a grid. Each of the plurality of elements (10) comprises a light source (L1). Each of the plurality of elements (10) further comprises at least two adjustable connections (12). The adjustable connections (12) connect the corresponding element (10) to respective supports (11) and adjustably position the corresponding element (10) relative to the respective supports (11). The invention further relates to a space comprising such a lighting system, a method of providing an illumination profile using such a lighting system and the use of such a lighting system for defining an illumination profile in a space.

Abstract: Driving a lighting device by a driving circuit for providing driving power for driving a lighting device, and by a decoupling unit for electrically decoupling the driving circuit from a lighting circuit. The driving power is transferred at least partially from the driving circuit to the lighting circuit, and the lighting device is arranged within the lighting circuit such that its anode is at ground potential of the driving circuit.