Abstract: The invention relates to a proxy node comprising means for managing a proxy table, a receiver for receiving a message from a first resource restricted device, said message being intended to at least one corresponding destination device, control means for checking whether an entry for the first resource restricted device is included in the set of entries of the proxy table, the set of entries of the proxy table indicating the set of resource-restricted devices the proxy node is in charge of, a transmitter for forwarding the message depending on the result of the proxy table checking, the means for managing the proxy table being arranged for cleaning the proxy table of the entry relative to the resource-restricted device by monitoring the relative usage of the proxy node for forwarding messages for the resource restricted device with the usage of competitor proxy nodes for forwarding messages for the resource restricted device.

Abstract: The present invention proposes to use a power negotiation connection (e.g. the VBUS channel) of a power delivery interface for transmitting or receiving control commands or, respectively, status information to/from a lighting device. The power negotiation connection can be used as a communication channel that is fully independent of the data connection. It uses, for example, different protocols and different wires than the data connection. Control commands, such as dim level or color, can be encoded in a vendor defined message of a related power negotiation protocol.

Abstract: A luminaire comprising: at least one light source arranged to emit light to illuminate an outdoor environment of the luminaire; at least one sensor, each of the at least one sensor arranged to provide a sensor output signal; a control module arranged to receive the sensor output signal from each of the at least one sensor and configured to communicate with a component of the luminaire based on the at least one sensor output signal; and a precipitation detection module arranged to receive the at least one sensor output signal and configured to detect occurrence of precipitation in the outdoor environment based on the at least one sensor output signal and control the light emitted from the at least one light source based on said detection.

Abstract: A retrofit LED lighting fixture for retrofitting alight source in a small recessed area. The retrofit LED lighting fixture has a junction box (200) installable through a luminaire housing (100) to fit within the small recessed area. A light engine module (300) is removably attached within the luminaire housing (100).

Abstract: A lighting network (100) comprises a plurality of lighting devices (200, 300, 400A-H) each having at least one connection to a source device (101), the connection being either direct or indirect via one or more others of the lighting devices forming the indirect connection, each of the lighting devices comprising a respective light source. A method of troubleshooting the lighting network comprises steps of: identifying, for a target one of the lighting devices, at least one of said connections between the source device and the target lighting device; determining a characteristic of the identified connection from the source device to the target device, wherein the characteristic comprises a signal strength of the identified one of said connections and/or a latency of the identified one of said connections; and controlling at least one of the light sources to render a visualization of the identified connection between the source device and the target lighting device in the lighting network.

Abstract: An optical arrangement, comprises first and second optical elements. The first optical plate is for collimating light from a light source to generate collimated light, which is provided to the second optical element. The second optical element acts an optical integrator homogenizing the light. The second optical element further generates a light output beam which has a spread of output angles which is dependent on the position. This means that the output spread of output angles can be controlled by controlling the light reaching the second optical plate and thus by controlling the illuminated area on the second optical plate. This can be achieved by selection of the relative positions of the source and the optical plates.

Abstract: The invention provides a lighting controller, comprising: a detector adapted to detect a voltage of a power source, said power source is for providing power to a lighting unit via a lighting driver; a controlling unit, coupled to the lighting driver and adapted for controlling the driver to deliver a constant power to the lighting unit regardless of the power source is being consumed, before the detected voltage drops below a first threshold, and controlling the driver to deliver a gradually reduced power to the lighting unit after the detected voltage drops below the first threshold.

Abstract: For load balancing in a large-scale wireless mesh network, a device, a system and a method are provided for controlling data packet transmissions in the wireless mesh network, wherein a time slot is randomly selected within a determined answer interval for transmitting an answer responding to a received data packet.

Abstract: A driver circuit has a driver unit (50) which provides a current for the load (51) based on an input voltage (10) comprising first and second terminals (10a, 10b). The driver unit (50) comprises a linear driver which comprises a current regulating element (Q3) between the input and the load, said element having a controllable resistive characteristic. A compensation unit (52) in series with the driver unit (50) and the input voltage provides a compensating voltage. This is used to control the voltage across the driver unit in dependence on the input voltage and operating conditions of the load. The compensation unit (52) comprises a switch mode power converter and a second capacitor (C2) as an energy source of the switch mode power converter, with the current regulating element (Q3), the load (51) and the second capacitor (C2) in series connection between the first and second terminals (10a, 10b).

Abstract: A lighting module configured to be powered by an external driver includes a light emitting diode (LED) array, and a control circuit configured to control current initially applied by the external driver to the LED array. A lighting system includes a driver configured to provide a constant current power supply and a plurality of lighting modules coupled to the driver. Each lighting module includes a light emitting diode (LED) array, and an integrated control module including an attenuator configured to attenuate current initially applied by the driver to the LED array in response to a received control signal, and a processor configured to generate the control signal to the attenuator.

Abstract: The invention relates to a disaggregation apparatus (1) for identifying an electrical consumer in an electrical network (2). An electrical signature providing unit (7) provides electrical signatures of the electrical consumers (4, 5, 6), and an electrical parameter determining unit (8) determines an overall electrical parameter of the electrical network (2). An identification unit (9) identifies an electrical consumer depending on the determined overall electrical parameter and a correlation of the electrical signatures. Since the identification unit identifies an electrical consumer depending on the determined overall electrical parameter and a correlation of the electrical signatures, the identification of an electrical consumer does not depend on the detection of an event only. This makes the identification more robust, especially less prone to errors caused by missed events, thereby improving the reliability of identifying an electrical consumer in the electrical network.

Abstract: A half bridge resonant converter comprises a half bridge inverter having a high side switch and a low side switch with an output defined from a node between the high side switch and the low side switch. The output connects to a resonant circuit. There are separate control circuits for generating the gate drive signals for controlling the switching of the high side switch and low side switch, in dependence on an electrical feedback parameter, each with different reference voltage supplies.

Abstract: A light emitting device (102, 202) comprising a light source (104) having a light exit surface, a wavelength converter (106) configured to convert light from a first wavelength to a second wavelength, said wavelength converter having a light exit surface (110) and a light entrance surface, a heat sink (100) and an optical coupling element (112), arranged in thermal connection with said heat sink (100) and said wavelength converter (106), wherein said optical coupling element (112) is selected to have a refractive index lower than a refractive index of said wavelength converter (106). The optical coupling element (112) will allow for an efficient heat transfer from the wavelength converter (106) to the heat sink (100) while avoiding loss of light from unwanted surfaces.

Abstract: The present invention relates to a system and a method for refined zoning via intersection. Specifically, anchor nodes (200) of a zone-based positioning system are divided into multiple hyper zones (40, 50) in different ways, where the different ways of dividing the hyper zones may be orthogonal to each other, with possibly partial overlapping. For each way of dividing the hyper zones (40, 50), the most likely candidate hyper zone is selected based on a user zoning method. Thereafter, the intersection (42) of the identified hyper zones is taken as the final location result of a mobile node to be located.

Abstract: A method of augmenting an illumination perception by one or more wearers of respective head-mountable computing devices each including at least one transparent display module is disclosed. The method comprises determining a desired light condition for said wearer in a space, determining an actual light condition for said wearer in said space; and displaying a semi-transparent image on the at least one transparent display module to filter the light passing through the at least one display module in case the actual light condition differs from the desired light condition. In embodiments, the user preferences may be used to perform a global optimization of the light output by one or more (distributed) light sources of a lighting system. Computer program products comprising computer program code for implementing such a method when executed on a suitable processor, a head-mountable computing device and a lighting system are also disclosed.

Abstract: A method of automatically commissioning a lighting system comprising a plurality of luminaires for illuminating one or more regions within a space. The method comprises: receiving signals from a positioning system, indicating a respective location within the space at which each of a plurality of physical entities is detected by the positioning system, each of the entities being a person or a movable nonhuman object. The method further comprises determining a spatial distribution of at least some of the entities based on the locations indicated by the signals from the positioning system, and determining a region within the space corresponding to this spatial distribution. The method then comprises identifying a group of the luminaires that are arranged to illuminate the determined region and storing identifiers of those luminaires together as a group in a commissioning database.

Abstract: An optical structure for processing the light output by a lighting unit, in which an antenna (36) is formed within or over an region (34) of the optical layer (23) of the structure, wherein the region (34) is away from the optical beam processing parts (21) a of the optical layer (23).

Abstract: A system comprising location server, a localization module and a node manager. The location server comprises a network interface operable to receive measurement reports submitted from a plurality of reference nodes of a location network, each measurement report reporting a measurement of a signal received by a respective one of the reference nodes from a respective one of one or more mobile devices. The localization module is configured to determine a location of one or more of the mobile devices based on at least some of the plurality of measurement reports. The node manager is configured to control whether and/or when one or more of the plurality of measurement reports are submitted from one or more of the reference nodes, in dependence on a measure of relevance to the determination of the location of one or more of the mobile devices.

Abstract: Disclosed is a luminaire (100) comprising: a heatsink (10) comprising a rim (20) 5 having a first rim section (21), a second rim section (22) and an intermediate rim section (23) in between the first rim section and the second rim section; a first heatsink region comprising a mounting region (40) and a plurality of first fins (31, 32) extending from the mounting region to at least one of the first rim section and the second rim section; and a second heatsink region comprising a plurality of second fins (33) looping from the 10 intermediate rim section; a light module (110) mounted in the mounting region (40) and thermally coupled to the first heatsink region, the light module comprising at least one light engine (120) and a controller (140) for the at least one light engine; and a sensor (50) mounted on the second heatsink region, the sensor being communicatively coupled to the controller, the controller being adapted to control the at least one light engine in 15 response to a sensor signal from the sensor.