Abstract: Mitigation techniques can be used to reduce noise generated by wireless communication circuitry (e.g., near-field communication circuitry) in an electronic device including a display, touch, and wireless communication circuitry. In some examples, a touch screen can have a backplane including a mesh of routing traces connected to an array of chiplets. In some examples, the chiplets can repeat signals to prevent the accumulation of noise induced by an NFC coil. In some examples, the ratio between vertical and horizontal resistances of routing traces can be configured to mitigate noise induced by the coil. In some examples, the routing traces of the mesh can be configured to share a common geometric centroid. In some examples, a plurality of routing traces can be routed in a twisted pair configuration. In some examples, the routing traces and chiplets can be routed to minimize traversal through regions of relatively high electromagnetic field.

Abstract: A method and a device are provided. The device includes a light-measuring sensor, a display, a memory, and at least one processor operatively connected to the light-measuring sensor, the display, and the memory, wherein the at least one processor is configured to analyze the frequency of an external light source, obtain an operation period of the display, obtain a ratio of an off period of time of the display on the basis of the operation period, and calculate illuminance by using different algorithms on the basis of the relationship between the frequency of the external light source and the operation period and the ratio of the off period of time of the display.

Abstract: The invention relates to a driver (100) for emergency lighting means (101), comprising output terminals (111a-b) for electrically supplying at least one emergency lighting means (101), and a test switch (103) for starting a test routine controlled by a controller (109) of the driver (100), wherein the driver (100) is settable to a commissioning mode if the test switch (103) is activated according to a predefined operation pattern defined by time durations and/or repetition criteria of the operation pattern.

Abstract: A lighting system includes a light engine including a correlated color temperature (CCT) terminal configured to transmit a first power signal having a first variance and to receive a CCT signal, the light engine being configured to emit light according to the CCT signal, and a CCT clamp coupled to the CCT terminal, and configured to receive the first power signal and to generate the CCT signal having a second variance, the first variance of the first power signal being greater than the second variance of the CCT signal.

Abstract: Provided is an apparatus for supplying power. The apparatus includes a rectifier unit configured to apply a voltage by rectifying alternating current power source, a light emitting unit including a plurality of light emitting diodes which emit light by electric current according to the voltage and are connected in series, a signal generation unit configured to generate a driving signal by dropping the voltage of the rectifier unit, and a switch unit including a plurality of transistors which are connected to the plurality of light emitting diodes, respectively, and are turned on by the driving signal and switch a route of electric current flowing in the plurality of light emitting diodes to be supplied to a microcontroller as power source.

Abstract: An electronic device may have a display. The display may have light-emitting diode pixels or other pixels. Due to aging-induced degradation of the pixels, the output intensity and color of the pixels may vary over the lifetime of the display. Control circuitry in the device may use an ambient light sensor to measure ambient light and stray display light. The display light measurements may be used in monitoring aging effects so that the control circuitry can compensate for aging-induced pixel degradation. Display light measurements may be made over a sequence of image frames. The image frames in the sequence of frames may include white and black frames or frames of different colors interleaved with black frames. Different frame intensities may be used during measurements of stray display light to gather gamma curves for the display.

Abstract: A hybrid sensor for calibrating a primary active infrared (IR) sensor to more accurately locate, continuously calibrate, and conserve energy by more accurately detecting via the active IR detection is described herein. The hybrid sensor includes one or more infrared sensors and one or more time-of-flight sensors. The time-of-flight sensor may remain in a dormant state (e.g., low power or sleep mode) until the one or more infrared sensors detect an object. In response to detecting an object, the time-of-flight sensor may be activated to obtain several measurements of the object. After obtaining the measurements, the time-of-flight sensor may return to its dormant state. The hybrid sensor may use the measurements obtained by the time-of-flight sensor to calibrate the one or more infrared sensors to provide more accurate measurements on an object-by-object basis.

Abstract: A brightness control method of an illumination device includes: obtaining a brightness of ambient light, determining an amount of supplementary light according to the brightness of the ambient light and target brightness if the brightness of the ambient light is less than the target brightness, and generating a first pulse signal according to the amount of supplementary light to control the illumination device to emit light.

Abstract: A system for locating an object in a volume of space can include a first electrical device disposed in the volume of space and having a first antenna and a first controller, where the first controller reduces a first default range of the first antenna to a first effective range. The system can also include an object disposed within the first effective range, where the first controller recognizes a first signal, using the first antenna, that identifies the object in the first effective range.

Abstract: Provided is a high-precision anti-interference VR system, including a data selection module, a headset, and a handle matched with the headset, the data selection module selects and invokes an optical tracking module group and an electromagnetic tracking module group according to an optical FOV range; the optical tracking module group includes an optical display module and an optical tracking module, the optical display module emits a physical signal by adjusting on-off and brightness thereof; the optical tracking module obtains the physical signal emitted by the optical display module, and converts the physical signal into tracking information of the handle; the electromagnetic tracking module group includes an electromagnetic emission module and an electromagnetic receiving module, the electromagnetic emission module generates an electromagnetic signal through a driving circuit, and transmits the electromagnetic signal; and the electromagnetic receiving module receives the electromagnetic signal to complete

Abstract: A faceplate remote control device may be attached to a wall-mounted mechanical light switch that has a toggle actuator. The faceplate remote control device may include a toggle indicator that detects operation of the toggle actuator of the mechanical switch. The toggle indicator may cause the generation of an indication of detected operation of the toggle actuator. The toggle indicator may comprise a sliding member that is configured to move with the toggle actuator. The toggle indicator may comprise an obstruction detection device that includes an infrared (IR) transmitter and an IR receiver. The faceplate remote control device may include a control circuit and a wireless communication circuit. The control circuit may be configured to cause the wireless communication circuit to transmit one or more messages in response to detecting operation of the toggle actuator of the mechanical switch.

Abstract: A display driving circuit including: a data driver configured to supply driving signals to a plurality of pixels of a display panel and sense electrical characteristics of each of the plurality of pixels; and a degradation compensation circuit configured to generate and store an accumulated degradation value by, accumulating degradation values for each of a plurality of pixel blocks for a unit time, based on driving data corresponding to the driving signals, correct the accumulated degradation value of a first pixel block, based on sensing data received from the data driver, and perform data compensation to compensate for pixel degradation, based on the accumulated degradation values and a degradation model, wherein each pixel block includes at least one pixel.

Abstract: A detection method for a liquid level of a storage tank is provided. The detection method determines that an optical sensor is for a liquid level detection purpose when a sensing value to a tank object is consistent with a first threshold condition. The detection method further determines the optical sensor as valid on liquid level detection when sensing values respectively corresponding to statuses of print material and non-print-material are consistent with a second threshold condition. During printing, the detection method starts/stops pouring print material into a storage tank when the sensing value of the optical sensor is consistent with a third threshold condition correspondingly.

Abstract: A lighting fixture includes a light source that emits an illumination light and a receiver configured to receive a lighting control message from a photo sensor device. The lighting fixture further includes a lighting controller configured to adjust the illumination light based on the lighting control message. Adjusting the illumination light by the lighting controller includes changing a Correlated Color Temperature (CCT) of the illumination light.

Abstract: The present disclosure relates to a method and a device for compensating for a luminance deviation. A difference in pixel value of the image capturing device between a first pixel and a second pixel in the screen and a difference in gray scale level between first and second gray scale levels are derived from a captured image at the first gray scale level and a captured image at the second gray scale level which include pixel values of the image capturing device. A pixel value for the second pixel is calculated from the captured image at the first gray scale level.

Abstract: A light fixture can be electrically connected to a module that can add certain functionality and/or alter the way the light fixture is controlled. A module base includes a module receiver configured to receive one of a plurality of modules. At least the module base is connected to input power. When a first module is coupled to the module base, the combination of the light fixture and module has a first range of functionality dictated at least in part by the functionality of the first module. When the first module is removed and replaced with a second module, the combination of the light fixture and the module has a second range of functionality dictated at least in part by the functionality of the second module.

Abstract: A lighting system configured for daylight emulation. The system includes a plurality of light sources for generating a daylight-emulating output light spectrum and a ventilation element for generating a simulated breeze to artificially emulate conditions in an outside environment of an enclosed structure in which the lighting system is disposed. The system also includes a controller for dynamically controlling at least one of the intensity, directionality and color temperature to emulate sun position for at least one of a geography and time of day. The controller also controls the generated simulated breeze of the ventilation element to be one of a cool breeze and a warm breeze to artificially emulate the outside environment in correspondence with the artificially emulated daylight spectrum. The system further includes a networking facility that facilitates data communication with at least one external resource.

Abstract: A touchpad module including: a touchpad printed circuit board (PCB); a switch coupled to a first side of the touchpad PCB; a touchpad bracket, with at least a portion of the bracket spaced apart from the switch a first distance; a frame, with at least a segment of the frame positioned between the portion of the bracket and the switch, the segment of the frame including a through hole in superimposition with at least a portion of the switch; and a stopper positioned within the through hole and with a first end of the stopper in contact with the switch.

Abstract: A transmission method includes: in a first period, causing a light source to emit light having a first luminance; and in a second period, causing the light source to transmit an optical signal by causing the light source to alternately emit light having a second luminance and light having a third luminance lower than the second luminance.

Abstract: The disclosure provides a display backplane, a method of manufacturing the same, and a display device using the same. The display backplane includes a substrate; a thin film transistor structure layer disposed on one side of the substrate and including thin film transistors, a gate insulating layer, and an interlayer dielectric layer, where an etching rate of the interlayer dielectric layer carried out under an HF atmosphere condition is less than 2 ?/S; and photosensitive devices spaced apart from the thin film transistor structure layer and disposed on one side of the thin film transistor structure layer away from the substrate. The interlayer dielectric layer has a high compactness, and can effectively block H from entering the active layer of the thin film transistor to conductorize the active layer, thus guaranteeing good optical characteristics of the thin film transistor while carrying out optical compensation.

Abstract: A system for street light lighting control and for Internet-of Things control for monitoring solar power generation includes a solar panel configured to generate photovoltaic-based electricity using sunlight; a battery configured to store the electricity generated by the solar panel; a solar controller configured to control the battery to store the electricity; and a street light controller configured to control lighting of at least one street light using the electricity stored in the battery, wherein the solar controller includes a battery information detection module configured to detect remaining charge information and discharging time information, which are charging/discharging status information of the battery and a communication module configured to transmit the remaining charge information and discharging time information to a monitoring server, wherein the communication module transmits the charging/discharging status information, the remaining charge information, and the discharging time information

Abstract: A platform for design of a lighting installation generally includes an automated search engine for retrieving and storing a plurality of lighting objects in a lighting object library and a lighting design environment providing a visual representation of a lighting space containing lighting space objects and lighting objects. The visual representation is based on properties of the lighting space objects and lighting objects obtained from the lighting object library. A plurality of aesthetic filters is configured to permit a designer in a design environment to adjust parameters of the plurality of lighting objects handled in the design environment to provide a desired collective lighting effect using the plurality of lighting objects.

Abstract: An electrical wiring device including a housing assembly including a plurality of terminals at least partially disposed therein, the plurality of terminals including a HOT/LOAD terminal, a NEUTRAL terminal, a first traveler terminal, and a second traveler terminal, wherein, when in use, at least one of the terminals is connected to line hot; a first series FET and a second series FET disposed in series between the HOT/LOAD terminal and one of the first traveler terminal or the second traveler terminal; at least one of a first sensor producing a first sensor output according to current flow or a voltage at the one of the first traveler terminal or the second traveler terminal and a second sensor producing a second sensor output according to current flow through the NEUTRAL terminal or according to a voltage between the first series FET and second series FET; and a controller configured to determine to which of the plurality of terminals line hot is connected based, at least, on the first sensor output or the s

Abstract: Provided is a power supply device comprising a voltage conversion portion configured to convert input voltage to output voltage by pulse width modulation, a frequency reduction circuit configured to reduce a frequency of the pulse width modulation in response to detection of an overload during normal operation of the voltage conversion portion and startup of the voltage conversion portion, and a frequency setting circuit configured to set the frequency of the pulse width modulation used when starting up the voltage conversion portion to a frequency higher than a minimum frequency corresponding to the overload. In addition, provided is a power supply control device and a power supply control method relating to the power supply device.

Abstract: A system to control solid state light sources, including a photosensor responsive primarily to wavelengths of light outside the emitted light band of wavelengths that the solid state light sources emit when the solid state light sources are in the ON state, and which produces a light level signal representative of a level of sensed light primarily for wavelengths outside of the emitted light band of wavelengths. A set of circuitry receives the light level signal representative of the sensed level of light from the photosensor, determines a contribution by the solid state light sources to the sensed level of light, and uses a compensated light level or a compensated threshold in assessing a dusk condition or a dawn condition when the solid state light sources are in the ON state to compensate for the contribution by the solid state light sources to the sensed level of light.

Abstract: A method is disclosed for maintaining a desired optical output in a solid state illumination device, where the device is configured to accommodate multiple light emitting diodes (LEDs) and to combine light from the LEDs to produce a single optical output. The method includes testing the LEDs before adding them into the device. The testing produces characterizing information that describes how one or more optical properties (e.g., optical power and/or peak wavelength) of the tested LED change with temperature. This characterizing information is stored in a computer-based memory of the device, and the tested LED is added (connected) into the device. Then, during operation, temperature sensors measure a temperature associated with each respective LED in the device, and electrical current to one or more of the LEDs can be adjusted based on the measured temperatures associated with each LED and its stored characterizing information.

Abstract: During operation, a computer obtains information specifying a lighting configuration of one or more lights in an environment, where the lighting configuration includes the one or more lights at predefined or predetermined locations in the environment. Then, the computer receives sensor data associated with the environment. Moreover, the computer analyzes the sensor data to determine a context associated with the environment. Then, based at least in part on the lighting configuration, a layout of the environment, and the determined context, the computer automatically determines the dynamic lighting states of the one or more lights, where a dynamic lighting state of a given light includes an intensity and a color of the given light. Next, the computer provides instructions corresponding to the dynamic lighting states to the one or more lights. Note that the dynamic lighting states may be based at least in part on a transferrable profile of the individual.

Abstract: The present disclosure provides an OLED panel, a driving method thereof and a display device. The OLED panel has pixel units arranged in rows and columns, and each including an OLED device. The OLED panel includes regions arranged in column direction, and each including at least one row of pixel units and a cathode layer, the OLED devices in each region share the cathode layer therein, and the cathode layer of each region is disconnected from the cathode layer of any other region. The OLED panel includes a cathode voltage supply circuit configured to output a cathode voltage including an operating level to the cathode layer. The cathode voltage supply circuit is configured to start outputting the operating level to the cathode layer of at least one region at a time at least later than a time when all pixel units in the region receive a scan signal.

Abstract: A dimming control method and a dimming circuit are used to control the brightness of a LED. The dimming circuit includes a power conversion unit having an input end, an output end, an inductor, and a switch. When the dimming current signal is higher than or equal to a first current threshold, the switch is controlled such that the power conversion unit operates in a continuous Conduction mode or a boundary Conduction mode; when the dimming current signal is lower than the first current threshold, the switch is controlled such that the power conversion unit operates in a discontinuous Conduction mode; and when the dimming current signal is lower than a second current threshold, the switch is controlled such that the power conversion unit operates in a chopping control mode.

Abstract: An apparatus includes an input voltage, a comparator configured to generate a pulsed-width modulation signal based upon variation in the input voltage using a reference signal, and a switched mode power supply control circuit configured to control a power supply in voltage mode based at least upon the first pulsed-width modulation signal.

Abstract: Disclosed is a proximity sensor operating method used in a proximity sensor comprising a light-emitting device. The method comprises: in a standby mode, when an output of the proximity sensor is a first sensing state, driving a driving current of the light-emitting device to comprise a first driving current; when the proximity sensor is triggered, a check mode is entered, the proximity sensor still outputs the first sensing state, and the driving current is switched to comprise a second driving current larger than the first driving current; and in the check mode, when the length of time/number of times of triggering the proximity sensor is larger than or equal to a threshold length/number, the output of the proximity sensor switches to the second sensing state, and returning to the standby mode in which the driving current comprises the first driving current.

Abstract: A lighting system has a controller which receives input information from physiological sensors associated with users in the area illuminated by the lighting system. Anxiety is detected of a user or users when in or approaching a particular region of the area, and the lighting is changed to reduce the anxiety. In this way, lighting changes only need to be made when there is a need based on the response of the particular users. The system thus 5 enables energy savings as well as more stable lighting conditions.

Abstract: A wireless lamp-driving device with an independent power source and a lamp system including the same are provided. The lamp system is composed at least of a light-emitting diode (LED) lamp, a stationary switching device, and a wireless controller, wherein the wireless lamp-driving device, the stationary switching device and the wireless controller have their respective power sources, the wireless lamp-driving device is connected to the stationary switching device and the wireless controller separately in a wireless manner, and is configured to receive wireless signals from the stationary switching device and the wireless controller in order to control the light emission states of the LED lamp according to the contents of each wireless signal received.

Abstract: The present disclosure provides a leakage protection circuit, a method and a drive device. The leakage protection circuit is used for being electrically connected with the power supply line of a load, and may be configured to sample the power supply line at intervals, detect the voltage of the sampled electrical signals to determine whether the voltage of the AC input power is divided, and provide leakage protection based on the determined result. The present disclosure can prevent human from electric shock through sampling the electric signals from the power supply line at intervals and performing voltage detection and comparison to determine whether the voltage of the accessed AC input power is divided, when the voltage of the accessed AC input power is determined to be divided, the power supply line will be controlled in non-conductive state.

Abstract: A LED lighting assembly is provided having a housing having a top portion and an opposed base, a plurality of lighting elements connected to and positioned radially around the assembly, at least one of the plurality of lighting elements connected to an integral heat sink wherein each of the plurality of lighting elements positioned adjacent to an optic, the optic configured to control the direction of the light such that it directs the light below horizon to improve the area lighting efficiency. The LED lighting assembly may be controlled remotely or by mesh operations as herein described.

Abstract: A light source device 100 has a light source 101 which emits light to be irradiated, a chromaticity measurement part (spectrometer) 109 for measuring the chromaticity of the emitted light emitted by the light source, a chromaticity adjustment part 120 capable of placing/removing chromaticity adjustment-use filters CHA and CHB onto/from the light path LP of the emitted light and capable of adjusting the chromaticity of the emitted light by placement/removal of the chromaticity adjustment-use filters, and a control part 400 which monitors a change of the chromaticity of the emitted light according to the results of measurement of the chromaticity measurement part and controls placement/removal of the chromaticity adjustment-use filters of the chromaticity adjustment part onto/from the light path LP so that the chromaticity becomes the chromaticity which is set in advance as a target.

Abstract: Single-layer LEDs were developed using a composite thin film of organometal halide perovskite (Pero) and poly (ethylene oxide) (PEO). Single-layer Pero LEDs have a device structure that resembles “bottom electrode (ITO)/Pero-PEO/top electrode (In/Ga or Au)”. Green emission LEDs with methylammonium lead bromide (bromide-Pero) and PEO composite thin films exhibit a low turn-on voltage of about 2.8-3.1 V (defined at 1 cd m?2 luminance), a maximum luminance of 4064 cd m?2 and a moderate maximum current efficiency of about 0.24-0.74 cd A?1. Blue and red emission LEDs have also been fabricated using Cl/Br or Br/I alloyed Pero-PEO composite thin films.

Abstract: An optical device includes a gallium and nitrogen containing substrate comprising a surface region configured in a (20-2-1) orientation, a (30-3-1) orientation, or a (30-31) orientation, within +/?10 degrees toward c-plane and/or a-plane from the orientation. Optical devices having quantum well regions overly the surface region are also disclosed.

Abstract: A device receives position information from a sensor of the device, wherein the position information indicates a position of a user of the device and a position of a person proximate to the user. The device receives lighting information from the sensor, wherein the lighting information indicates lighting conditions around the device and the user. The device calculates a position adjustment for an infrared element of the device based on the position information and the lighting information, and calculates an intensity adjustment for the infrared element based on the position information and the lighting information. The device receives, via an input element of the device, input data provided by the user, and implements the position adjustment and the intensity adjustment to enable the infrared element, when illuminated, to reflect light away from the input element and to prevent image or video capture of the input data.

Abstract: Disclosed herein is a lighting system configured to obtain an indicator data of a RF spectrum signal generated by a number of receivers at a number of times in an area. At each respective one of the number of times, for each respective one of the receivers, apply one of a plurality of heuristic algorithm coefficients to each indicator data for the respective time, based on results of the applications of the coefficients to indicator data, generate an indicator data metric value for each of the indicator data for the respective time, and process the indicator data metric values to compute an output value. The lighting system is further configured to compare the output value at each of the plurality of times with a threshold to detect one of an occupancy condition or a non-occupancy condition in the area and control the light source in response to the detected one of the occupancy condition or the non-occupancy condition in the area at each of the number of times.

Abstract: Lighting control systems are disclosed that have a plurality of current sensors and a microprocessor. A first current sensor in the plurality of current sensors measures a first current of a first LED channel, and a second current sensor measures a second current of a second LED channel. The microprocessor is configured to set a setpoint that defines a maximum current for a dimming profile of a lighting fixture, and control a biological light ratio according to the dimming profile. The ratio may be an M/P ratio of melanopic lux to photopic lux or an OPN5/OPN4 ratio of OPN5 lux to melanopic lux. The dimming profile correlates the ratio to a percentage of the maximum current.

Abstract: Techniques are disclosed for decoding light based communication (LBC) messages transmitted between a transmitter device and a receiver device. The receiver device includes a processor that executes a process to decode a received LBC message. The processor determines a moving average and removes the moving average to provide a second digital message (with the moving average removed), to account for any noises or interferences. The moving average may be determined using a length-preserving moving average. The peak location in the second digital message is identified and used as a start position for synchronization when the peak location is above the threshold. Sampling points are derived, and logical maximum and minimum values (1's and 0's) are assigned to one or more of the sampling points. The logical values are decoded to generate a decoded sequence of data representative of the received LBC message.

Abstract: A radiant heating system includes a radiant heating zone, a first radiant heating feature on a first side of the radiant heating zone and a second radiant heating feature on a second side of the radiant heating zone opposite the first side. A method of radiant heating is also disclosed.

Abstract: The invention relates to a system comprising a storage means, a calculating means and a reproduction means, the calculating means being capable of assigning quantitative data, which are representative of an employee's success at work, to one of at least two categories; the storage means comprising at least two different exhibits starring a boss, the exhibits being representative of the boss's different emotional states, and at least one of the exhibits being assigned to each of the categories; and the reproduction means being capable of presenting any of the stored exhibits to the employee; wherein the system is configured such that it selects a certain exhibit based on the employee's success at work and presents the selected exhibit to the employee; and wherein the exhibit is selected from the group consisting of images, video sequences, or audio sequences starring the real life boss.

Abstract: The invention discloses a lighting control method, by setting the first target illumination value of the illumination sensor so that the illumination of the target area is the set illumination value. Later, at each time node, the system calculates the current second target illumination value of the illumination sensor, and then adjusts the brightness of the lamp so that the detected value of the illumination sensor reaches the second target illumination value. When the detected value of the illumination sensor reaches the second target illumination value, the illumination of the target area can be consistent with the set illumination value of the target area at this time. The present invention can make the target area to substantially maintain constant illumination during the illumination period.

Abstract: The present disclosure relates to a dual motion detection system. In certain embodiments, the dual motion detection system includes: at least one passive infrared (PIR) motion detection device, at least one radio frequency doppler (RFD) motion detection device, and a dual motion detection system controller. A power module of the dual motion detection system controller provides electrical power to PIR motion detection device continuously to enable the PIR motion detection device to detect object motion. The power module provides electrical power to the RFD motion detection device only when PIR motion detection device detects object motion during a period of time TW. The RFD motion detection device is used to confirm a positive PIR motion detection by the PIR motion detection device and reduce false motion detection using single motion detection device and reduce electrical power consumption of the dual motion detection system.

Abstract: A lighting fixture adapter, methods for manufacturing a lighting fixture adapter, and methods for attaching a lighting accessory to a lighting fixture are disclosed. Embodiments include an adapter that connects to a lighting accessory and allows a user to connect the lighting accessory to a lighting fixture using less twisting than would normally be required when attaching the accessory to the fixture. Embodiments allow a lighting accessory that normally requires multiple rotations to operatively and/or fully engage with a lighting fixture to operatively and/or fully engage with the fixture using a maximum 360 degrees rotation, 180 degrees of rotation, 90 degrees of rotation, or no rotation. Some embodiments include a kit with one or more of: an adapter (which may include a flange), a replacement component for the lighting fixture (which may include a flange for engaging the adapter flange), wires, wiring connectors, an anti-rotation component, and a plug.

Abstract: A system for locating an asset can include a first light fixture disposed in a volume of space and having a first transceiver, a first light source, and a first modulation circuit, where the first light source emits a first light output that defines a first line of sight, where the first modulation circuit generates and sends a first VLC signal that is part of the first light output, where a first light fixture location of the first light fixture in the volume of space is previously determined using the first transceiver during an auto-commissioning process. The system can also include a communication device associated with the asset, where the asset is disposed in the volume of space, where the communication device includes a second transceiver, where the second transceiver receives the first VLC signal from the first transceiver.

Abstract: A control unit controls a bidirectional switch so as to turn the switch from ON to OFF when an amount of time, varying according to a lighting level, passes since a starting point of a half cycle of an AC voltage. When a voltage between both terminals of a capacitive element, connected to a control terminal of the bidirectional switch, becomes equal to or greater than a threshold voltage, the bidirectional switch turns from OFF to ON A first charging/discharging regulator circuit and a second charging/discharging regulator circuit each make a rate of fall of the voltage between both of the terminals of the capacitive element when the bidirectional switch turns from ON to OFF lower than a rate of rise of the voltage between both of the terminals of the capacitive element when the bidirectional switch turns from OFF to ON.

Abstract: An illumination device and methods are provided herein for avoiding over-current and over-power conditions in one or more power converters included within the illumination device. The illumination device may include at least a plurality of light emitting diode (LED) chains, a driver circuit, at least one power converter, and a control circuit. In some embodiments, the control circuit may be generally configured for determining a maximum safe current level and/or a maximum safe power level attributed to the power converter(s) at a present operating temperature, and for adjusting respective drive currents supplied to the plurality of LED chains by the driver circuit, so as not to exceed the maximum safe current level or the maximum safe power level at the present operating temperature. In some embodiments, a temperature sensor may be included within the illumination device for measuring the operating temperature presently associated with the power converter(s).