Abstract: A light system for a stadium, the light system comprising: at least one sensor configured to determine light intensity values for multiple locations within the stadium; at least one electronically controllable luminaire configured to generate light directed towards at least one location of the multiple locations within the stadium based on a received control parameter; a controller configured to receive the light intensity values from the at least one sensor, further configured to determine a light intensity difference based on the light intensity values from the multiple locations within the stadium, and configured to select the at least one electronically controllable luminaire and generate the control parameter for the least one electronically controllable luminaire based on the light intensity difference to attempt to reduce the light intensity difference.

Abstract: A light emitting device (1) comprising a light source (2) adapted for, in operation, emitting light (13) with a first spectral distribution, a first light guide (3) comprising a first light input surface (31) and a first light exit surface (32) arranged opposite to one another, and further comprising an end surface (35) extending perpendicular with respect to the first light input surface (31), and a second light guide (4) comprising a second light input surface (41) and a second light exit surface (42) extending perpendicular with respect to one another.

Abstract: The invention relates to a housing (1) for an electrical device wherein an inner surface (2) of said housing has a conductive pattern (3) providing at least one conductive track, said track being arranged to provide local electric interconnection from the housing to at least one enclosed electrical component of said electrical device and/or vice versa, wherein the conductive pattern is fixedly fastened to said inner surface (2) of said housing so that said conductive pattern will break if the housing wall is broken where the conductive pattern is fastened.

Abstract: A luminaire (100) comprising a chamber (110) comprising at least one light exit surface (112); an axial carrier (120) mounted in said chamber (110) on an axis (105), said axial carrier (120) carrying a plurality of solid state lighting elements (122) and being surrounded by the light exit surface (112); and a body (130) mounted around said axial carrier (120), said body (130) comprising a plurality of radially extending optical cells (140) each comprising an inlet (142) facing said axial carrier (120); an outlet (144) facing the light exit surface (112); and a plurality of reflective surfaces (146, 148) extending from said inlet (142) to said outlet (144); wherein at least one of the axial carrier (120) and the body (130) are rotatably mounted relative to said axis (105) and wherein the body (130) can be rotated relative to the axcial carrier (120) or vice versa.

Abstract: A multi-staged lighting device (1) for generating a polarized multi-colored light beam (25) is disclosed. The multi-staged lighting device (1) comprises two or more light concentrators (5, 15), each light concentrator (5, 15) having a wavelength converter (8, 19) configured to convert light entering the light concentrator (5, 15) to light having a longer wavelength, and at least one polarizing beam splitter (10) configured to split converted light coupled out from a light concentrator (5, 15) into two light beams having different polarizations, one of the light beams being transmitted to a different light concentrator (5, 15) and the other light beam forming a color component of the polarized multi-colored light beam (25).

Abstract: Methods and apparatus for detection and notification of pressure waves are described herein. A lighting unit (100) may include one or more light sources (104) such as LEDs, a pressure wave sensor (106), a communication interface (108), and a controller (102) operably coupled with the one or more LEDs, the pressure wave sensor, and the communication interface. In various embodiments, the controller may be configured to receive a signal from the pressure wave sensor, the signal representative of one or more pressure waves detected by the pressure wave sensor. The controller may be configured to determine, based on the signal received from the pressure wave sensor, that the detected one or more pressure waves satisfy a predetermined criterion. The controller may be configured to transmit, to one or more remote lighting units via the communication interface, notification that the predetermined criterion has been satisfied.

Abstract: The invention relates to a DC power distribution system, especially an EMerge DC power distribution system (1). The system is adapted such that power conductors (3, 4) electrically connected to different groups (5, 6) of ports (14) belong to separate power line communication (PLC) channels, wherein several electrical loads (7 . . . 10; 11 . . . 13) are in power line communication with a group of ports of a same PLC channel. The separation of the different PLC channels allows for a relatively simple determination to which group of ports which electrical loads are electrically connected. This information can be used by, for instance, a user to commission the electrical loads. For example, if the locations of the power conductors, which are electrically connected to certain groups of ports, are known, the information about which electrical loads are connected to which groups of ports can be used for determining the location of the respective electrical load.

Abstract: According to a first aspect of the invention, a method (6) of operating a presence detector (310) is provided, comprising the steps of transmitting (603) a first wave signal in a first time slot (810) for detecting presence of an object, based on an echo of the first wave signal, and if presence of an object is detected, changing (606) a property parameter of the first wave signal. According to a second aspect of the invention, a method (7) of operating a presence detector (320) is provided, comprising the steps of monitoring (701), in a first time slot (810), a property parameter of a first wave signal transmitted from another presence detector (310), and transmitting (704) a control signal upon detection of a change in the monitored property parameter of the first wave signal. The invention is advantageous in that presence information is communicated between different presence detectors without any need for additional communication systems, thereby reducing technical complexity and costs.

Abstract: The present invention relates to assisting a user in selecting a lighting device (408) design through receiving an image of a scene, e.g. the user taking a picture using his/her smartphone of his/her living room (410) and analyzing this image in order to select or generate a lighting device (408) design. The analysis can comprise determining the presence of a pattern, material or color in the scene and a lighting device (408) design can be selected (e.g. from an electronic catalog) that comprises a similar pattern, material or color. As another example, a lighting device (408) design can be generated to match such a pattern, material or color. The invention further comprises a system and computer program product for implementation of this method.

Abstract: A lighting device (1) is provided comprising at least one light source (3), a wavelength converting element (8) adapted to convert a wavelength of light emitted by the at least one light source, at least one support (7) arranged to support the wavelength converting element remote from the at least one light source, and an envelope (2) adapted to enclose the wavelength converting element and at least a portion of the at least one support. The at least one support is arranged to be able to pivot relative to the wavelength converting element. The present lighting device enables using a rigid wavelength converting element and an at least partially rigid support, as these two components may be moved relative to each other for facilitating insertion of the unit in the envelope.

Abstract: A device for adaptable wavelength conversion and a device for energy conversion are described. The device for adaptable wavelength conversion comprises at least one layer comprising a wavelength converting material and arranged to receive and re-emit a light beam. the device is further arranged to manipulate the at least one layer to operate in a closed state, in which a surface of the at least one layer is substantially covered with the wavelength converting material and to operate in an open state, in which the surface of the at least one layer is substantially uncovered with the wavelength converting material. The device for adaptable wavelength conversion can be applied in combination with a solar cell or photovoltaic cell thereby enabling the solar cell to receive radiation having a suitable spectrum under varying lighting conditions.

Abstract: Devices (1) for controlling gates (21-24) arranged to control amounts of power to be supplied to loads (51-54) via cables (2) may comprise receivers (11) for receiving requesting signals from the gates (21-24), analyzers (12) for analyzing requests defined by the requesting signals in view of available cable power capacities, generators (13) for in response to analysis results generating instructions for the gates (21-24) and transmitters for transmitting instructing signals defining the instructions to the gates (21-24). The analyzers (12) may analyze the requests in view of load-information comprising steady-state-information/transient-state-information. The devices (1) may comprise communicators (15) for communication with auxiliary converters (31-33) coupled to auxiliary sources (41-43) such as batteries (41) and solar panels (42, 43) and may comprise predictors (16) for predicting the available cable power capacities.

Abstract: A lighting circuit comprises a first circuit (1) with an element (31) with a diode function coupled serially to a parallel combination of a capacitor (41) and a serial combination of a first LED (21) and a first switch (11) and comprises a second circuit (2) with a second switch (12). The circuits (1, 2) are parallel circuits. The lighting circuit produces light in response to a supply current from a current source (6). The second switch (12), when conducting, lets the supply current pass and prevents it from flowing through the element (31), and, when non-conducting, blocks the supply current and it flows through the element (31). The first switch (11), when non-conducting, prevents the first LED (21) from producing some of the light, and, when conducting, allows the first LED (21) to produce some of the light. Power for the first LED (21) is delivered via the supply current when flowing through the element (31) or via a capacitor current supplied by the capacitor (41).

Abstract: The invention describes a bleeder circuit (1) realized for use in a dimmer (2) comprising a main AC switch (20) for switching a supply voltage (LINE) to a light non-linear load (L), which bleeder circuit (1) comprises a bleeder load (11) realized to provide operational assistance to main AC switch (20); wherein the bleeder load (11) is enabled on the basis of a switching signal (T20) of the main AC switch (20). The invention further describes a dimmer (2) comprising such a bleeder circuit (1). The invention also describes an electrical appliance comprising a light non-linear load (L) and such a dimmer (2). The invention further describes a method of dimming a light non-linear load (L).

Abstract: The present invention relates to a circuit arrangement for mitigating power quality issues. It offers protection to sensitive devices against, for example, voltage sags and swells. The system introduces, for loads connected to an AC power source (e.g. a TV in a home connected to the power grid) a DC power source coupled to a controllable inverter and a controllable switching mechanism. By switching to a series configuration, the DC power source (e.g. a photovoltaic power source) can either draw or supply power in order to mitigate a power quality issue. In normal operation, by switching to a parallel configuration the DC power source can feed the load.

Abstract: The invention relates to an interface device for supplying power to a variable number of loads, which are configured to be coupled to the interface device by means of a supply line and which are configured to communicate with the interface device, to a system comprising such interface device and one or more loads, to a corresponding method for supplying power and to a corresponding software product. A particular feature of the present invention is that the interface device functions as an intermediate between an USB power source and the loads connected to the interface device by supplying power while being flexible to both sides, i.e. to the supplying side as well as to the load side, in allowing for a flexible number of loads to be coupled to the interface device (i.e. to be supplied by the interface device with power) and in also providing a negotiation with the power supply depending on the necessary power.

Abstract: A lighting device (100) comprising a collimator (112) having an entrance aperture and an exit aperture (302), a crossed beam splitter (106, 206) and at least four lighting units. Each of the lighting units comprises a light source (102) and a focusing element (104) having an entrance aperture (308) arranged to receive light from the light source (102) and an exit aperture (304). The focusing element (104) is configured to focus light towards the beam splitter (106, 206), and the crossed beam splitter is arranged to receive light from each of the lighting units and configured to split the light from each light source into four beams. Further, the beam splitter (106, 206) is arranged and configured such that said four beams are directed towards the entrance aperture of the collimator (112). The collimator (112) is configured to interact with said beams to provide four images, each image comprising one fourth of the light from each lighting unit.