Abstract: The invention relates to powering one or more devices, in particular in the context of Power-over-Ethernet (PoE). In an embodiment of the invention, it is proposed to equip each node (11) with a PD interface (22) that can signal multiples of the standard defined unity load (25 k? with tolerances) during the detection process and increase the load during a sequence of detection attempts. In that way, several nodes (11) can share one PSE outlet and determine the number of neighboring loads (11). At the same time, each node (11) will offer full functionality during “normal” stand-alone wiring. This powering concept can be combined with full or limited data communication capabilities.

Abstract: The present invention relates to a Power over Ethernet system (100) which supports additional optical communication via optical fibres. The powered devices (d1, d2, d3) may comprise circuitry to process optical signals, in particular triggering activation of the powered device (d1, d2, d3) after being in a low power state. The power supplying devices (s1-s6) may relay optical signals via direct optical paths. Optical paths in the network may improve timing accuracy of applications. The overall power consumption of the system may be improved in particular during low activity situations in which the system is primarily used for data communication. The additional optical communication paths may provide redundant paths and thus may increase the network's robustness.

Abstract: The invention relates to powering one or more devices, in particular in the context of Power-over-Ethernet (PoE). In an embodiment of the invention, it is proposed to equip each node (11) with a PD interface (22) that can signal multiples of the standard defined unity load (25 k? with tolerances) during the detection process and increase the load during a sequence of detection attempts. In that way, several nodes (11) can share one PSE outlet and determine the number of neighboring loads (11). At the same time, each node (11) will offer full functionality during “normal” stand-alone wiring. This powering concept can be combined with full or limited data communication capabilities.

Abstract: An electronic verification system is provided, comprising: (I) multiple electronic verification devices (120), comprising: —a beacon receiver (124) arranged to receive localizing beacon signals transmitted from multiple beacons (110) installed in the vicinity of the multiple verification devices, the verification device transmits the beacon message to an external beacon verification computer, and (II) the beacon verification computer (130) configured to analyze the multiple beacon messages to determine if a localization system comprising the multiple beacons is functioning correctly.

Abstract: A lighting device (6) comprising a light emitting diode module (8), arranged for being installed in a lighting fixture (1), and for receiving power from a ballast (3) accommodated in the lighting fixture (1). The lighting device (6) has a ballast type detection circuit (12), for determining ballast type detection data from power signals supplied by the ballast (3), and a communication circuit (13), operatively connected to the ballast type detection circuit (12), for exchanging the ballast type detection data, among others for providing maintenance information and for operation of the lighting device (6) in a lighting system.

Abstract: The present invention relates to an energy management device (40) and a method of operating the same. The energy management device (40) comprising a buffer controller (41) and an energy buffer unit (45) wherein the buffer controller is configured to connect the energy buffer unit (45) to operate a load device upon detecting that the load device is in an accepting operational state and the voltage provided by a power supply device is between the first and second threshold, during a power negotiation period between the power supply device (10) and the load device (20).

Abstract: A method of determining the power consumption of a lighting device, the lighting device comprising a lamp unit for emitting illumination to illuminate a space, and a powering device which supplies an electrical power signal to power the lamp unit to emit said illumination. The method comprises: storing power consumption data of a plurality of types of powering device under different lamp unit loading conditions; at the lamp unit, determining a type of the powering device to which the lamp unit is coupled; at the lamp unit, determining an operating status of the lamp unit; determining the corresponding power consumption of the powering device from the stored power consumption data, based on the determined type of powering device, and the operating status of the lamp; and calculating the total power consumption of the lighting device as the sum of the power consumption of the powering device and the lamp unit.

Abstract: An electronic building automation system (100), comprising: (I) one or more electronic building automation devices (120), comprising a processor circuit (128) configured to monitor the building automation device, determine a need for servicing of the building automation device, and (II) a servicing device (150) for locating a building automation device in need of servicing, wherein one of a building automation device and the servicing device comprises: a servicing beacon (110), the servicing beacon is arranged to transmit a localizing beacon signal, and wherein the other of the building automation device and the servicing device comprises: a beacon receiver (124) arranged to receive a localizing beacon signal transmitted from a servicing beacon, the building automation device and servicing device being arranged for the building automation device to be locatable when in need of servicing.

Abstract: A lighting device (6) comprising a light emitting diode module (8), arranged for being installed in a lighting fixture (1), and for receiving power from a ballast (3) accommodated in the lighting fixture (1). The lighting device (6) has a ballast type detection circuit (12), for determining ballast type detection data from power signals supplied by the ballast (3), and a communication circuit (13), operatively connected to the ballast type detection circuit (12), for exchanging the ballast type detection data, among others for providing maintenance information and for operation of the lighting device (6) in a lighting system.

Abstract: A DC-powered lighting device (100) for placement in an external fixture (102) (104), the DC-powered lighting device comprising a lighting unit (110), connector pins (112) configured to mechanically and electrically connect the DC-powered lighting device to the light fixture, a probing unit (118) connected to the connector pins and configured to determine whether electrical power is currently available via the connector pins and to provide a power-present signal indicative of the current availability of electrical power via the connector pins, a DC-power input unit (114) configured to receive DC power from a second external electrical power source, and to deliver the received DC power to the lighting unit and a switching unit (120) configured to allow the delivery of the DC power to the lighting unit in dependence on the power-present signal.

Abstract: Power management (203) for controlling a delivery of a DC-power to a device (204) operable in an accepting operational state or a non-accepting operational state with respect to receiving the DC-power comprises: receiving DC input power; providing an indication that the DC-power supply device (202) operates in a powered-device detection mode and not in an powered-device operation mode; connecting, when the DC-power supply device (202) is in the powered-device detection mode, the power to an energy storage unit (212); storing electrical energy currently received; determining, whether the power-acceptance criterion is fulfilled and, in case it is fulfilled, providing an instruction to operate in the accepting operational state; connecting the energy storage unit (212) and a power interface unit (206) when the external DC-power supply device (202) is currently operating in the powered-device operation mode.

Abstract: A DC-powered lighting device (100) for placement in an external fixture (102) (104), the DC-powered lighting device comprising a lighting unit (110), connector pins (112) configured to mechanically and electrically connect the DC-powered lighting device to the light fixture, a probing unit (118) connected to the connector pins and configured to determine whether electrical power is currently available via the connector pins and to provide a power-present signal indicative of the current availability of electrical power via the connector pins, a DC-power input unit (114) configured to receive DC power from a second external electrical power source, and to deliver the received DC power to the lighting unit and a switching unit (120) configured to allow the delivery of the DC power to the lighting unit in dependence on the power-present signal.

Abstract: The invention provides an LED chip having an integrated electrostatic switch for electromechanical control of the LED. A suspended beam switch floats above a conductive control electrode, and by a charging of the electrode may be attracted downward to make connection between an LED structure and an external electrode. Components are mounted on a common substrate so that a fully integrated LED with MEMS switch is formed. Methods for producing the LED chip are further provided, in which production of the switching mechanism is fully integrated with the production of the LED structure.

Abstract: A lighting system for improving the alertness of a person comprising: one or more light sources (101) arranged to emit light into an environment, at least one of the one or more light sources being arranged with a primary function comprising providing illumination into the environment; and a controller (103) configured to cause at least one of the at least one light sources to provide a secondary function of emitting at least a first light pulse (503) having a duration of between 1 ms and 50 ms, wherein there is an idle period (505) lasting at least 0.1 s on either side of the first light pulse.

Abstract: A circuit arrangement (1), a detection circuit (50, 70) and an LED driver circuit (100, 110) is disclosed for operating at least one lighting unit, such as an LED unit, with a phase-cut operating voltage. The circuit arrangement (1) comprising at least an input (6) for receiving a phase-cut operating voltage from said power supply and/or an output (7) for connection to said at least one lighting unit and a pulse injection circuit, configured to determine a phase-cut operation of said power supply and to draw a current pulse from said power supply within a delay time between 200-700 ?s after said phase-cut operation to provide a stable operation of said LED unit with the phase-cut power supply.

Abstract: The present invention relates to a powered device (331a, 331b, 531a) with two interfacing connections. The powered device (331a, 331b, 531a) comprises power switching units (350a, 350b, 550a1, 550a2) for forwarding the data signal as well the power received on the input to the output. Forwarding may be based on a detection of the powering state of the PD. In another embodiment, the Power-over-Ethernet input/output ports function bi-directionally, thereby allowing the user to daisy-chain devices in any direction. As power switching units, relays or solid-state power switches may be used.

Abstract: A light unit (10) including one or more lighting devices, in particular one or more LEDs is disclosed. The light unit comprises input terminals (12, 14) for connecting the light unit to an external power supply (16) and for receiving an input voltage (V10) from the external power supply. A first lighting device and at least one additional lighting device (22, 24) connected in series to the input terminals and a charge storage device (26) is connected in series to the first lighting device. The first lighting device (20) and the additional lighting device (22, 24) forms a tapped linear driver that the number of the lighting device (20, 22, 24) being turned on depending on an amplitude of the input voltage (V10).

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.

Abstract: A Power-over-Ethernet (PoE) device for use in a PoE system is described. The PoE device comprising a first PoE port for connecting the device to an upstream PoE device or a central control unit, a second PoE port for connecting the device to a downstream device or PoE device and a control unit for controlling data and/or power communication between the first and second PoE port. The control unit further comprises a first power input terminal connected to the first PoE port to receive electrical power for powering the control unit.

Abstract: The invention provides a lighting unit (1) comprising a light source (20) and an actuator (40). The light source (20) is arranged to generate, during use, a light beam (B) whose light intensity is dependent upon an electrical power signal (I; V). The actuator (40) is arranged to orient, during use, the light beam (B) in an orientation dependent upon the electrical power signal (I; V). The orientation of the light beam has a pre-determined relationship to the light intensity of the light beam. The invention further relates to a lighting system (100) comprising at least one lighting unit, a space (1000) comprising such a lighting system, and a use of such a lighting system.