Abstract: A system (1) is configured to determine a first level of dynamicity in video frames, determine a second level of dynamicity in each of a plurality of analysis areas (52,73) in the video frames, compare each of the second dynamicity levels with the first dynamicity level, select a subset (73) of the analysis areas based on the comparisons, determine image characteristics from the subset of analysis areas in the video content, determine one or more light effects based on the image characteristics, and control one or more lighting device to render the one or more light effects and/or store a light script specifying the one or more light effects. The light effects are to be rendered while the video content is rendered on a display device (9).

Abstract: The invention relates to an optical component (140) for a luminaire (100). The optical component (140) comprises a carrier plate (141) having an upper surface (141a) and a lower surface (141b), and a plurality of lens elements (142) provided on the upper surface (141a). Each two neighboring lens elements (142) has an intermediate region (143). In each intermediate region (143), the carrier plate (141) comprises a slit (144) having an elongated shape with an axis of elongation parallel to a plane of the carrier plate (141). The optical component (140) can be used in a luminaire (100) to meet the office requirements regarding glare, in particular the L65 requirement.

Abstract: A light-emitting assembly comprising a substrate adapted to be cut, a plurality of light strips and a first connection member extending longitudinally over at least part of the substrate for supplying power to the plurality of light strips is provided. A first group of linear light strips extend over the substrate from a first side of the first connection member, and a second group of linear light strips extend over the substrate from a second side, opposite to the first side, of the first connection member. The assembly further comprises a controller system configured to control a power supply to a light strip of the plurality of light strips via the first connection member. The plurality of light strips and/or the first connection member are adapted to be cut to customize a layout of the light-emitting assembly.

Abstract: A light emitting device configured to tunably emit light with a total color temperature (CTtot), comprising: a carrier comprising a first major surface and an opposite second major surface, a first light source, arranged on said first major surface, and arranged to emit light with a first color temperature (CT1) tunably adjustable within a first range from a first low to a first high color temperature, a second light source, arranged on said second major surface, and arranged to emit light with a second color temperature (CT2) tunably adjustable within a second range from a second high to second low temperature, a controller configured to individually control the first and second light sources so to tunably adjust CT1 and CT2 from a first state to a second state according to a preselected scheme, by increasing CT1 and decreasing CT2 between said first and second states, such that CTtot remains unvaried.

Abstract: The present invention relates to adjusting one or more wireless parameters of one or more nodes (12, 14, 16) based on one or more node parameters including a relative location of the one or more of the nodes (12, 14, 16). The nodes (12, 14, 16) are wirelessly connected in a wirelessly connected system (100) and configured for transmitting radio frequency (RF) signals (18), receiving RF signals (18), or both. The one or more wireless parameters are adjusted such that the wireless performance of the one or more of the nodes (12, 14, 16) is optimized for an application of the wirelessly connected system (100). Transmission power can be adjusted such that a probability of detecting an event in a volume (212, 222) not to be covered by the one or more of the nodes (12, 14, 16) is reduced, allowing reduction of false positives from non-covered volumes (212, 222).

Abstract: A light emitting device comprising a mixing chamber (3). The mixing chamber having a bottom surface (31), a light exit window (33) and at least one side wall (32). The at least one side wall extends between the bottom surface and the light exit window. The light emitting device further comprises at least one light source (4) adapted for, in operation, emitting light into the mixing chamber. The at least one side wall (32) comprises an inner surface part (34) that borders the light exit window (33) and that faces an internal space (8) of the mixing chamber. The inner surface part (34) is an asymmetric reflector (9) to reflect a larger amount of incident light back towards the bottom surface (31) than towards the light exit window (33).

Abstract: A system comprises a battery, a load and a power converter for converting battery power from the battery into load power for application to the load. A system controller enables selection between a continuous discharge mode and a discontinuous discharge mode of the battery. In this way, the battery can be operated in different ways according to the most appropriate battery discharge characteristics.

Abstract: A method of controlling a multicolor LED lighting device is discloses. The LED lighting device comprises at least two series-connected LED light sources with different color metric values and supplied with a current, each LED light source is controlled by a respective switch operating according to a duty cycle. The method adapts an operating current amplitude supplied to the multicolor LED lighting device based on a color point that is required by a user. The method comprises the steps of receiving a designated color metric value for the LED lighting device; determining an operating current amplitude for the LED lighting device based on a current profile over a range of color metric values and the designated color metric value, and setting the current supplied to the LED light sources to the determined operating current amplitude.

Abstract: In order to provide a reliable interconnection between a wireless mesh network and an external network, more than one border router device may be deployed. A novel load balancing method, and the related system and devices, are disclosed in this invention. By embedding actual traffic load information in the frequency of sending the border router advertisements, automatic traffic load balancing among multiple border routers is realized in 5 the system, without extra signaling overhead or any change to the beacon packet structure.

Abstract: A method for 3D printing a 3D item (10), the method comprising (i) providing 3D printable material (201) comprising particles (410) embedded in the 3D printable material (201), wherein the particles (410) have a longest dimension length L1, a shortest dimension length L2, and an aspect ratio AR defined as the ratio of the longest dimension length L1 and the shortest dimension length L2, and (ii) depositing during a printing stage 3D printable material (201) to provide the 3D item (10) to provide layers (230) of the 3D printed material (202) with a layer height H, wherein AR>4 and H/L1<1.

Abstract: The invention relates to an incorporation of a current limiting/regulating circuit on a luminaire board for ensuring that the luminaire board will automatically operate at its desired current after a replacement. Since the current control at the luminaire board causes an initial mismatch between the current supply of the driver and the demand of the luminaire board, the driver output voltage will drift towards the maximum output voltage of the driver. When the maximum output voltage is reached, the driver is configured to operate in constant-voltage (CV) mode, sense the output current and reduce its output current to the same value as consumed by current-controlled luminaire board. Alternatively, the driver may gradually reduce the setpoint of the output current until it just leaves the CV mode and stay at that setpoint. In this way, the driver will automatically operate at the correct current of a newly installed luminaire board without any action from the user.

Abstract: An array of lenslets include a first surface with a plurality of individual cells defining one side of a respect lenslet, a second opposite surface with a set of grooves defining a second side of the array of lenslets. The array of lenslets is a circular arry having a plurality of concentric rings. Each ring includes a plurality of straight segments, and each segment includes lenslets arranged in a row. The lens is disposed over a carrier having an array of light emitting diodes (LEDS) disposed such that some of the LEDs are offset from a center of an associated cell, or a plurality associated with a shared cell and disposed at different positions along a groove direction.

Abstract: A controller (5) for controlling a controllable device (31-33) is configured to determine one or more characteristics of a set of received radio frequency signals, detect interaction with a physical control device (36,37) by a user, determine, based on the characteristics of the set of received radio frequency signals, a shape of a hand (91) which is holding or touching the physical control device and/or a manner in which the user is using the physical control device, perform person identification based on the hand shape and/or based on the manner of using the physical control device, and control the controllable device based on the interaction in dependence on a result of the person identification.

Abstract: An artificial skylight structured to emit light for imitating a sun-sky appearance, the artificial skylight comprising a sun-appearance imitating lighting fixture comprising a diffuser frame of visible light diffusing material, the diffuser frame forming side walls of a recessed window and a first light emitting source for emitting first light through the diffuser frame, as well as a sky-appearance imitating lighting fixture comprising 5a light exit panel being of visible light transmissive material and a further light emitting source for emitting second light through the light exit panel; wherein the light exit panel is mounted on the side walls of the recessed window of the diffuser frame of the sun-appearance imitating lighting fixture, and wherein the artificial skylight further comprises an optical element configured to limit first light emitted by the sun-appearance imitating lighting 10 fixture from exiting via the recessed light exit panel of the sky-appearance imitating lighting fixture.

Abstract: The present invention generally relates to a lighting device (200) that comprises an optical component (100) for generating a beam shaping effect. The lighting device (200) further comprises a light source (201) and a light reflective component (114). The light source (201) is configured to provide a light source light and the light reflective component (114) is configured to at least partially reflect at least part of the light source light. The optical component (100) comprises a tubular body (101) having an outer surface (102), and an inner surface (103) opposite to the outer surface (102), the inner surface (102) at least in part forming a cavity (104). The tubular body (101) comprises a first end face (107) and a second end face (108) arranged opposite to the first end face (107).

Abstract: A lighting system comprises a lighting arrangement (153) and a controller for controlling the lighting arrangement. The lighting arrangement comprises an artificial skylight (161-163) and a functional general lighting device (166,168) for providing horizontal light. The functional general lighting device comprises a horizontal luminous surface. The functional general lighting device is positioned in parallel and adjacent to the artificial skylight. A spacing between the functional general lighting device and the artificial skylight does not exceed the width of the artificial skylight. The controller is configured to control the artificial skylight and the functional general lighting device to render different light effects of a dynamic light scene. The dynamic light scene specifies a temporal sequence of light effects for each of a plurality of lighting devices, including the artificial skylight and the functional general lighting device.

Abstract: The invention provides a LED filament device (1000) configured to generate LED filament device light (1001), wherein the LED filament device (1000) comprises a LED filament (1100), wherein the LED filament (1100) comprises a plurality of light generating devices (100), each comprising a solid state light source (10), wherein the plurality of light generating devices (100) comprises a first set of n1 first light generating devices (110) configured to generate red first device light (111), a second set of n2 second light generating devices (120) configured to generate blue second device light (121), and a third set of n3 third light generating devices (130) configured to generate green third device light (131), wherein at least part of a total number n2 of the second light generating devices (120) of the second set are configured neighboring to first light generating devices (110) of the first set, wherein at least part of a total number n3 of the third light generating devices (130) of the third set are config

Abstract: A lighting device connects to an external power supply and includes a light emitting load and a secondary load. A temperature measurement is obtained related to a temperature of the external power supply. The secondary load is activated, thereby allowing the secondary load to be powered by the external power supply, when the temperature measurement is below a threshold. Thus, in cold conditions, an increased load is presented to the external power supply to assist start up of the external power supply in cold conditions.