Abstract: A LED driver circuit uses a first current source circuit to set an output current, controlled by pulse width modulation and a second current source circuit for charging a storage capacitor. A compensating arrangement is used for increasing the current delivered by the second current source circuit during off period times of the pulse width modulation. This compensates the current drawn from the input and enables better timing control of the input current pulses.

Abstract: A control interface (10) for controlling a system, comprising a module comprising: a carrier (32) having a top surface and an opposite bottom surface; an elongate window formed in, or adjacent, the carrier; an elongate array of light sources (36) on the bottom surface of the carrier; a reflector arrangement (40) for reflecting light from the array of light sources towards the window (38) to escape from the top surface, such that a light path is formed between each light source and the window (38), with a portion of the light paths being parallel to the carrier (32), wherein the light sources are adapted to be turned on in response to a control signal; wherein the module further comprises: a user interface surface (20), comprising a track area (22) for receiving touch input from a user, wherein the window is formed beneath the track area; and a touch sensor circuit (34) beneath the track area (22), wherein the touch sensitive circuit (34) comprises a touch sensor region on the top surface of the carrier (32);

Abstract: A mixing and shaping system with a mixing and shaping optic is provided. The system can include an optical housing configured to secure the optic along with a diffuser component arranged between the optic and the exit lens of the optical housing. The optic includes an integrally formed mixing pipe and reflector body configured to mix and shape radiation for superior near field and far field mixing. The mixing pipe is optically coupled to one or more radiation sources. The reflector body includes a first internal surface configured to receive the radiation from the one or more radiation sources and reflect or refract the radiation, and a second internal surface configured to receive the reflected radiation and reflect or refract the radiation, wherein at least a portion of the reflected radiation is configured to exit the reflector body through the first internal surface.

Abstract: The invention provides a module for installation of a lighting unit in a recess, wherein the module comprises: a first body comprising a first collar; a second body comprising a second collar; at least one flexible strut; wherein the first body and/or the second body is configured to hold said lighting unit; wherein the first body and the second body are rotatable relative to each other around a rotation axis, and are positionally fixed relative to each other in the axial direction of said rotation axis; wherein the at least one flexible strut comprises a respective first end and a respective second end, wherein said first end is fixed to a respective first connection point on the first collar and said second end is fixed to a respective second connection point on the second collar; wherein the at least one flexible strut comprises a strut length, wherein the strut length is at least a factor 1.

Abstract: A clip device for mounting a light fixture to a ceiling tile grid includes a base configured to be located on a surface of the light fixture. An edge portion extends from the base and is configured to be located in a recess in the surface of the light fixture. An arm extends from the edge portion through a first hinge such that the arm is bendable between a substantially horizontal orientation with respect to the surface of the light fixture to a substantially vertical orientation with respect to the surface of the light fixture when installed. A channel element extends from the arm through a second hinge such that the channel element is bendable to form a channel for receiving a portion of the ceiling tile grid to mount the light fixture. A light fixture system incorporating the clip device is also disclosed.

Abstract: A method comprises determining (101) sensing input and determining (103) a likelihood that a human or animal is present based on the sensing input. The sensing input reflects changes in radio frequency signals received by one or more devices. The method further comprises controlling (105) a lighting device to render a light effect upon determining that the likelihood exceeds a presence detection threshold, and to continue to render the light effect for a subsequent predetermined period of time even when the likelihood changes by more than a predetermined value within the predetermined period. The method further comprises indicating (107) the likelihood to a user via an indication selected from a plurality of indications, e.g. by rendering the indication on the lighting device. A different indication of the plurality of indications is selected upon determining that the likelihood has changed more than the predetermined value.

Abstract: A system for controlling a light source based on an analysis of image content (101) in an analysis region (131-141) of the image content while a display displays the image content is configured to obtain the image content, obtain a distance between the light source and a surface, determine a size and/or location for the analysis region based on the distance, determine a characteristic of the image content by analyzing the image content in the analysis region, determine a light effect based on the characteristic, and control the light source to render the light effect.

Abstract: The invention provides a LED filament lamp (10) comprising: an envelope (11) enclosing a chamber (13) sealed with a stem (12), wherein the stem extends into said chamber; a LED filament structure (14) with at least two individually controllable segments (141-145); a controller (15) configured to receive a control signal and control each of the at least two individually controllable segments based on said control signal, wherein the LED filament structure (14) and the controller (15) are arranged within the chamber (13); a driver circuit (16) arranged outside the chamber, wherein the driver circuit comprises two powerlines (161, 162) extending through the stem (12) or the envelope (11) for powering the LED filament structure (14) and the controller (15), wherein the driver circuit (16) is configured to convey said control signal to the controller (15) via a control line (163) extending through the stem or the envelope.

Abstract: In a multi-cell wireless communication system (100) with at least one optical access point (120) and at least one radio frequency access point (120), more flexibility is provided to an end device (110) in selecting an access point (120) for establishing a data link. Because of the line-of-sight characteristic of an optical link and the limited field of view of an optical receiver, optical cells are typically deployed with a relatively high density and adjacent optical cells may have an overlapping area. This invention discloses a method of an end device (110) for selecting a favorable access point (120) with reduced overhead, even when the end device is located in the overlapping area of two adjacent optical cells.

Abstract: The invention is related to a pair-assignment device (100) comprising a sensing-node position ascertainment unit (102) configured to ascertain position information (P.I.) pertaining to respective positions of external RF-sensing nodes (104,106) with respect to a predefined sensing volume (108) of a RF context-sensing arrangement and a pair-assigning unit (110) configured to assign, using the ascertained position information, at least one transmitter-receiver pair among the individual RF-sensing nodes of the RF context-sensing arrangement to perform a RF context-sensing function, to assign to the RF sensing nodes of the given transmitter-receiver pair a transmitter role (Tx) and a receiver role (Rx), respectively.

Abstract: A system (1) for configuring a configurable system that comprises a plurality of devices that have been given names is configured to obtain the names given to the plurality of devices, determine which of the plurality of devices have similarities in their names and determine a group (56) comprising a subset of the plurality of devices based on the similarities. The subset comprises multiple devices which have similarities in their names (52-53). The system is further configured to define the group in the configurable system by configuring the configurable system.

Abstract: A method of charging an energy storage element; wherein the energy storage element comprises a plurality of energy storage units arranged for storing electrical energy; wherein the method comprises: determining a voltage of each of the plurality of energy storage units; determining a state-of-the-charge, SoC, of each of the plurality of energy storage units; determining a maximum power voltage, Vmp, of a solar power source; selecting (one or more) energy storage units of the plurality of energy storage units to form a charging set comprising a series and/or a parallel combination of the selected (one or more) energy storage units; wherein the selection is based on the determined maximum power voltage, Vmp, and on a first time period and a second time period associated with a first sun irradiance level and a second sun irradiance level respectively.

Abstract: An approach for providing an auxiliary arrangement for a LED tube lamp that adapts a DC voltage for a monitoring circuit of the LED tube lamp. In particular, a modulation circuit of the auxiliary arrangement modulates a DC supply voltage, for the LED tube lamp, to simulate one or more characteristics of an alternating mains supply voltage for which the LED tube lamp is adapted. Preferably the at least one electrical characteristic comprises one or more electrical characteristics configured to designed to be detected by a monitoring circuit of the LED tube lamp operating in a safety detection mode, to allow the monitoring circuit to start a safety detection using the DC supply voltage.

Abstract: Following the trend of IoT, more and more sensors and/or to network devices may be connected to a control network. This enables more advanced functionality but also may result in contradictory control commands being generated by different network devices. A distributed master control device election method, and the related system and devices, are disclosed. Among others a control device (200, 200a, 200b, 200c) is disclosed to connect to a control network (110), it sends a local beacon message with information on a local hierarchy level associated with the control device itself within a first period of time, to announce the presence of the control device to devices on the network, and monitors the network (110) during the first period of time for detecting potential beacon messages from other devices on the network.

Abstract: The invention provides a light generating device (1000) comprising a light source (10) and a luminescent element (20), wherein:—the light source (10) is configured to generate the first radiation (11); wherein the light source (10) comprises a laser light source;—the luminescent element (20) comprises (i) a plurality of element bodies (200) and (ii) a thermally conductive support (400); wherein the plurality of element bodies (200) comprises a plurality of first bodies (210) and a plurality of second bodies (220);—the plurality of first bodies (210) comprise a luminescent material (50), wherein the luminescent material (50) is configured to convert at least part of first radiation (11), selected from one or more of UV radiation and visible radiation, into luminescent material light (51); wherein the first bodies have a first thermal conductivity K1; wherein the first bodies (210) are configured in a light receiving relationship with the light source (10);—the plurality of second bodies (220), different from t

Abstract: A boost converter has a main energy storage inductor and a main GaN boost switch with a node between them. A pre-charging switch is connected at the output side of the main boost switch and the inductor, between the node and an output capacitor. The pre-charging switch comprises a body diode in the forward direction from the output capacitor to the node. The output capacitor is charged by the pre-charging switch in a pre-charge phase and this provides a soft start-up to avoid large inrush currents. A third switch, which is also a GaN switch, is in series with the pre-charging switch to provide synchronous output rectification. The third switch has a body diode in a forward direction from the node to the output capacitor. In the pre-charge phase, both the boost switch and third switch are turned off whereas in a subsequent boost phase, the pre-charging switch is turned constantly on, and alternately the boost switch and the third switch are turned on and off to implement the boost conversion.

Abstract: The invention provides a lighting system (1000), wherein the lighting system (1000) comprises np system sections (100), wherein nF?2, wherein each system section (100) comprises a light source array section (110), a collimator section (120), and a Koehler integrator section (130), wherein: for each of the system sections (100) applies: the light source array section (110) comprises a plurality of section light sources (10) configured to provide light source light (11); the Koehler integrator section (120) comprises a section entrance face (131) and a section exit face (136), wherein the section entrance face comprises a plurality of section entrance lenslets (132) shaped according to an section entrance surface pattern (31), and wherein the section exit face (136) comprises a plurality of section exit lenslets (137) shaped according to a section exit surface pattern (36), and wherein the section entrance face (131) is configured in a light receiving relationship with the plurality of section light sources (10