Abstract: The disclosed embodiments relate to a lighting device (1) comprising an exit window (2) and a light source substrate (3) arranged to carry at least one solid-state light source (4), the at least one light source (4) being arranged to emit light through the exit window (2). The exit window (2) is shaped to allow a front surface of the light source substrate (3) to be brought into physical contact with a surface of the exit window facing the light source substrate (3), and in that the light source substrate (3) is held in physical contact with the exit window (2), thereby enabling thermal contact between the light source substrate (3) and the exit window (2). Since thermal contact between the exit window and the light source substrate is secured, the heat transfer of the lighting device will be improved.

Abstract: According to the invention, a PIR sensor system (100) comprises a first PIR sensor (1) associated with a first sensing region (11) and a second PIR sensor (2) associated with a second sensing region (12). The first and second sensing regions partially overlap and are divided into detection cells (46a-46f) and (45a-45d). Each detection cell is represented by predetermined characteristics of first and second output signals, which signals are based on input signals from first and second sensing elements (4-7) of each PIR sensor. Thereby different detection cells are encoded by a certain combination of signal characteristics (amplitude and sign) of the first and second output signals. Further, the PIR sensor system comprises a processing unit (15) configured to associate the characteristics of the first and second output signals with one of the detection cells for determining in which of the detection cells a heat source is positioned.

Abstract: The invention relates to a method for determining an unknown position, i.e. height and/or orientation, of a light source within a locality. The determination is based on a first image of a scene within the locality acquired by a camera in such a manner as to contain a light footprint of light emitted by the light source from the unknown position. The method includes steps of processing the first image to determine one or more characteristics of the at least the portion of the light footprint within the first image, comparing the determined characteristics with one or more corresponding known characteristics of a light footprint of light emitted by the light source from a known position to determine a deviation between the determined and the known characteristics, and determining the unknown position of the light source based on the determined deviation.

Abstract: The invention provides a multi-channel plate (100) comprising (i) a plurality of parallel arranged channels (1) and (ii) at least a light source (10) configured to provide light source light (11), wherein a first channel (110) includes a light transmissive part (12), wherein the light source (10) is configured to provide light source light (11) downstream from the light transmissive part (12) and external from the first channel (110) as a first lighting function, and wherein the multi-channel plate (100) includes a second channel (120), configured to provide an additional function different from said first lighting function.

Abstract: Disclosed is a method for improving a lighting condition with a wearable computing device (100), the method comprising determining (302) an actual light condition with an optical sensor arrangement (114, 220); determining (303) the user activity with a further sensor arrangement (116, 230) for determining a user activity, said user activity being associated with a suitable lighting condition for performing said activity; comparing (304), on the wearable computing device, the actual light condition with the suitable light condition; and generating (306, 406) a signal with the wearable device if the actual light condition deviates from the suitable light condition. A computer program product including computer program code for implementing this method when executed on a wearable computing device (100), a wearable computing device (100) including the computer program product and a lighting system kit including a lighting system (200) and the wearable computing device (100) are also disclosed.

Abstract: A wireless LED tube lamp device (100) comprises: an at least partially transparent tube (7); at least one LED (1) arranged within said tube; at least one LED driver (4); a LED controller (5); an RF antenna (30; 40) coupled to the controller for receiving and sending wireless commands. The RF antenna is a curved antenna having antenna elements (31, 32, 33; 41, 42, 43) located in a common curved plane wherein said antenna comprises an array of half-loop wire antenna, and said array of half-loop wire antenna comprises a plurality of coils of line.

Abstract: A lighting arrangement (10) is disclosed that comprises a plurality of solid state lighting elements (22) mounted on a grid of conductive wires (12), said grid comprising a plurality of grid segments (20) each defined by respective portions of adjacent conductive wires, each grid segment comprising a pair of reinforcement members (24, 26) affixed to said portions; and at least one said solid state lighting element mounted on said portions in between the reinforcement members of at least some of the grid segments. An apparatus and method for deforming such a lighting arrangement are also disclosed.

Abstract: Power consumption in a start-up circuit for a LED-based light bulb may be reduced by digitally switching a transistor of the start-up circuit coupled to the input voltage. When the transistor is digitally switched between on and off, a reduced amount of power is dissipated by the transistor, because it may not enter a saturation region of operation where the resistance of the transistor between drain and source terminals increases. The transistor may be coupled to a voltage regulator for generating one or more output voltages, including a supply voltage for a host controller IC. The transistor may be switched on and off by a digital signal generated by logic circuitry, which may decide to switch the transistor on and off based on a voltage level at an output of the voltage regulator.

Abstract: A system for detecting localized ground position changes makes use of plurality of lighting units, each fixed to the ground. Each lighting unit comprises a positioning system and a transmitter for transmitting positioning information to a remote central processing unit. The positioning information from the plurality of fixed lighting units is processed to identify local ground position changes. The infrastructure of a networked lighting system in this way enables ground information to be determined, for example for detecting ground movement in response to natural events or man-made activities (such as tunneling, building, extraction of natural resources etc.).

Abstract: The present invention relates to a method for operating a communication apparatus in a network comprising a plurality of communication nodes, upon reception of a message at the communication apparatus, the communication apparatus starting a retransmission delay being selected at random from a retransmission delay interval, said retransmission delay interval being dependent on at least one of a status of the communication apparatus and a property of the received message, the communication apparatus monitors retransmissions of said message by other communication nodes during said retransmission delay and the communication apparatus transmitting a retransmission of said message at the expiry of said retransmission delay if a statistic based on the retransmissions of said message by other communication nodes is below a threshold.

Abstract: An article of manufacture (130) for protecting a capacitive power transfer system (100) from electrical breakdowns is disclosed. The article of manufacture comprises a non-conductive layer (210) made of a first type of non-conductive material, and a protection layer (220) made of a second type of non-conductive material, wherein a breakdown voltage of the second type of non-conductive material is higher than a breakdown voltage of the first type of non-conductive material, wherein the protection layer covers only a portion of the non-conductive layer, where in the non-conductive layer and the protection layer form an insulating layer (130) of the capacitive power transfer system.

Abstract: A plurality of devices communicate over a bus, the devices comprising a plurality of controller devices and a plurality of second devices. Each of the controller devices is responsible for assigning one or more of the addresses including at least the address of each of a respective one or more of the second devices. A controller device comprises address allocation logic configured to assign an address to each of that controller device's respective one or more second devices, by: searching for a currently unassigned address to assign to each of the respective one or more second devices, and if an unassigned address for one of those one or more second devices cannot be found, to issue a request to at least one other of the controller devices requesting that the other controller device changes one of the one or more addresses which that other controller device is responsible for assigning.

Abstract: An electronic system and method include a controller to actively control transfer of excess energy to an auxiliary-winding of an auxiliary power dissipation circuit. The excess energy is a transfer of energy from a primary winding of a switching power converter to the auxiliary-winding of the auxiliary power dissipation circuit. In at least one embodiment, the electronic system is a lighting system that includes a triac-based dimmer. The excess energy is energy drawn through the primary-side winding of the switching power converter to provide operational compatibility between a dimmer through which a power supply provides energy to the switching power converter and a load to which the switching power converter provides energy.

Abstract: The present invention relates to a LED tube (1) for retrofitting in a fluorescent tube lighting fixture having a preheat phase during which the fluorescent tube lighting fixture is arranged to preheat filaments of a fluorescent tube, the LED tube (1) comprising: an array of LEDs (2), a LED driver (4) for driving the array of LEDs (2), a first pair of contact pins (8, 0) at a first end (12) of the LED tube (1) and a second pair of contact pins (14, 16) at a second end (18) of the LED tube (1) for connecting the LED tube (1) electronically and mechanically to the fluorescent tube lighting fixture, the first pair of contact pins (8, 10) being connected forming a first circuitry, the second pair of contact pins (14, 16) being connected forming a second circuitry, the LED driver (4) being connected between the first circuitry and the second circuitry, and a temperature controlled switch (20) having an open state and a closed state, and being arranged to adapt the closed state when heated, such that a current path

Abstract: A method of creating a lighting scene, the method comprising: receiving a still or moving input image; identifying one or more image segments within the input image (S22), including determining a shape of each of the one or more image segments (S23); determining a respective color and/or brightness level of each of the one or more identified image segments; determining a shape associated with each of a one or more luminaires present within the environment; matching the shape of each of the one or more identified image segments to the shape associated with a respective one of said luminaires or a respective group of the luminaires (S25); and for each respective of the one or more identified image segments, controlling the respective luminaire or group of luminaires to emit light with a color selected based on the color of the respective image segment and/or with a brightness level selected based on the brightness level of the respective image segment (S26).

Abstract: A method for manufacturing a rotationally adjustable lamp (1) is disclosed. The method comprises: molding a shell (6) having a guiding slot (7a); providing a base (2) configured to receive the shell (6) and connect to a lamp socket; inserting the shell (6) into the base (2) so as to enclose the guiding slot (7a) by the base (2); and forming in the base (2), when the shell (6) is inserted into the base (2), a notch (5) protruding into the guiding slot (7a), the notch (5) being movable along the guiding slot (7a) so as to allow for the shell (6) to be rotated relative to the base (2).

Abstract: Systems, methods, mobile computing devices and computer-readable media are described herein relating to light-based positioning. In various embodiments, light sources (106) may be commissioned to selectively energize one or more LEDs to emit light carrying a coded light signal. The coded light signal may convey information about a location of a lighting effect (102) projected by the one or more LEDs onto a surface (104). In various embodiments, mobile computing devices (100) such as smart phones or tablets may detect these coded light signals from the lighting effects and/or from the light sources, extract the location information, and utilize it to determine their locations within an environment.

Abstract: Disclosed is a product comprising a luminous surface, the product comprising a light guide (10) providing said luminous surface, said light guide comprising a plurality of scattering elements (12) for producing a substantially homogeneous light output across said luminous surface; and a first solid state lighting element (20) arranged to emit a beam of light (30) into the light guide; wherein the light guide further comprises a body (40) arranged to create a region (50) in the light guide shaded from said beam.