Abstract: Systems and methods for facilitating collaboration between a local user or team in a meeting space and one or more remote users outside the meeting space are provided. The virtual co-location system may include, for example, an IOT device including sensors, a microphone, a beacon light, a speaker, a user control interface (e.g., including a control input adjusted by the local user, the user control interface producing an electronic control signal representing a setting of a control device), and/or a local microprocessor for executing local collaboration software. The virtual co-location systems and methods may also or alternatively include a remote computer having a remote microprocessor for executing remote collaboration software.

Abstract: A lighting system includes a master lighting device, a control unit, and one or more slave lighting devices. The master lighting device includes a power input, a light emitting component, a memory device, a processor, and a network interface to communicate over a network. The memory device stores computer readable code that when executed by the processor, causes the master lighting device to receive a message that includes brightness information over the network, receive information regarding a characteristic of power received at the power input, control a brightness level of the light emitting component based on the brightness information and the information regarding the characteristic of the power, and send a message to the slave lighting devices to control their brightness level. The control unit includes a network interface send the message that includes the brightness information over the network.

Abstract: An LED driver implements a first constant-current drive scheme for a first range of sensed voltages up to a threshold voltage. After this, a second drive scheme is implemented with a current lower than the constant current of the first drive scheme.

Abstract: A direct current power server configured to serve a direct current microgrid of a building. The direct current power server includes a direct current bus having branch circuits that extend from the direct current power server to provide direct current power to direct current loads of the building. The direct current power server directly integrates a local energy source and local energy storage into the direct current microgrid without attachment to the alternating current electrical grid.

Abstract: There is provided a portable light-emitting apparatus including: a near-field wireless communication unit for transmitting and receiving a light emission mode to and from another light-emitting apparatus; and a switching unit for starting control of the light-emitting apparatus according to the light emission mode received by the near-field wireless communication unit in response to a switching instruction originating from at least one of an action using the light-emitting apparatus and an action using another light-emitting apparatus. As one example, when a switching instruction is outputted by touching another light-emitting apparatus, it is possible for a plurality of light-emitting apparatuses to successively emit light in the manner of a torch relay.

Abstract: A safety system has higher user design flexibility. Motor controllers (20, 30) include a motor drive circuit (207) that outputs a motor voltage command signal for driving motors (90, 100) in accordance with a motor drive command value, an inverter (211) that supplies power for driving the motors (90, 100) by switching based on the motor voltage command signal, a safety control unit that outputs a drive permission signal for driving the motors (90, 100) in accordance with communication data received through a communication circuit (213), a cut-off circuit (209) that receives the drive permission signal and the voltage drive command signal and cuts off the voltage drive command signal to an inverter (211) when receiving no drive permission signal, and a safety input unit (205) that receives redundant safety input signals. The cut-off circuit (207) receives a logical AND of the safety input signal and the drive permission signal.

Abstract: A luminaire produces lighting as a series of frames of constant spectral content includes sensors and an interpreter for executing scripts that describe the spectral contents of respective frames. The scripts may include spectral data and executable code for altering the spectral data and depend on sensor data. In particular, a frame descriptor may include data for a frame, a repeat count indicating a number of frames, and an identifier for a subroutine that uses sensor data. One or more luminaires can be network connected to one or more computers running applications providing user interfaces for script generation. A standardized interface can control communications with the luminaires and convey sensor data.

Abstract: A load control device for controlling the amount of power delivered to an electrical load is able to operate in a normal mode and a burst mode. The load control device may comprise a control circuit that activates an inverter circuit during active state periods and deactivates the inverter circuit during inactive state periods. The control circuit may operate in the normal mode to regulate an average magnitude of a load current conducted through the electrical load to be above a minimum rated current. The control circuit may operate in the burst mode to adjust the average magnitude of the load current to be below the minimum rated current. The control circuit may adjust the average magnitude of the load current by adjusting the length of the inactive state periods while holding the length of the active state periods constant.

Abstract: Systems and methods of the disclosed subject matter provide a first light source, a second light source, and a controller communicatively coupled to the first light source and the second light source, the controller to control a first operation of the first light source according to an input received by the controller for at first period of time, and to control a second operation of the second light source when the input received by the controller is for a second period of time that is greater than the first period of time.

Abstract: The subject matter described herein relates to light based positioning. In one embodiment, a method comprises: responsive to receiving a light signal from at least one light source available to the device, decoding a beacon from the received light signal, the beacon associated with the at least one light source; measuring signal strength of the received light signal; and determining a position of the device at least in part based on the decoded beacon, the measured signal strength, and number of the at least one light source. In addition, the frequency channelization and random channel hopping may be utilized to further improve the performance.

Abstract: A method for regulating a brightness of a luminous unit includes regulating the luminous unit by a pulse width modulator which provides an electric current having a predefined current value Y at a start time t0; modulating the electric current to a predefined brightness value at the start time t0 with a frequency of switching pulses that is chosen depending on a predefined brightness value; and progressively reducing the current value of respective switching pulses of the pulse-width-modulated electric current to a current value Y? proceeding from a start time t0 until a target time t1. The current value Y? is chosen in such a way that the luminous unit is luminous with the predefined brightness value upon a permanent supply with an electric current corresponding to the current value Y?. The respective switching pulses of the electric current are lengthened in their duration until a continuous electric current arises.

Abstract: System and method include luminaires, control switches, occupancy detectors, and photocells connected to central control module for setting up, testing, commissioning and maintaining the system. Memory card interface and associated memory card provided for loading, saving and/or transferring configuration, update firmware, and log system operation data, which can be automatically recognized to perform appropriate actions. System and method provide switching between different mutually exclusive lighting modes where lighting of each mode is sequenced such that second lighting mode is initiated before first mode is terminated, resulting in continuity of lighting in controlled area.

Abstract: Described herein are ambient lighting devices, methods, and systems that utilize at least one multimode artificial ambient light source, a control unit, and a remote image sensor. The control unit couples to at least one artificial ambient light source and is configured to output at least one control signal to the at least one artificial ambient light source. The at least one multimode artificial ambient light source is configured to output light of varying color and color temperature in response to said at least one control signal. The remote image sensor couples to the at least one control unit and is configured to detect at least one color and intensity characteristic and output an output signal to the at least one control unit, based on said color and intensity characteristic detected.

Abstract: A horticultural luminaire, a horticultural lighting arrangement including a plurality of the horticultural luminaires, and a method for controlling the horticultural lighting arrangement are described. The horticultural luminaire includes a main light emitting unit including at least one LED for generating a main spectrum, an environmental sensor for measuring environmental data, and control electronics for determining a position data representing position of the horticultural luminaire, sending out the environmental data and the position data, receiving control data, and controlling the emission intensity of the main light emitting unit on the basis of the control data.

Abstract: The Power Supply Unit comprises an output providing electrical power between a positive power supply line and a common ground line and a communication line. An adjustable current generator responsive to an internal measurement signal generates an output current at the output, and a voltage source is coupled to the communication line. A current measurement unit measures a current through the communication line and generates the internal measurement signal depending on the measured current through the communication line. Specifically, the Power Supply Unit is configured to determine the voltage drop on the common ground line by applying via the voltage source two different voltages to the communication line.

Abstract: An optoelectronic semiconductor component includes a first functional region having an active zone provided for generating radiation or for receiving radiation, and a second functional region, which is suitable for contributing to the driving of the first functional region. The first functional region and the second functional region are integrated on the same carrier substrate.

Abstract: Provided is a controller for use with a luminaire. The controller that includes a processor connected to at least one lead of a receptacle included in the luminaire. The processor can be programmed to multiplex at least one lead of the receptacle to achieve at least one of a plurality functions.

Abstract: According to some embodiments, a system comprises a generator of a truly random signal is connected to an input and feedback device for the purpose of providing a user with real time feedback on the random signal. The user observes a representation of the signal in the process of an external physical event for the purpose of finding a correlation between the random output and what happens during the physical event. In some examples, the system is preferably designed such the system is shielded from all classically known forces such as gravity, physical pressure, motion, electromagnetic fields, humidity, etc. and/or, such classical forces are factored out of the process as much as possible. The system is thus designed to be selectively response to signals from living creatures, in particular, humans.

Abstract: A control device may comprise a plurality of buttons, a plurality of light sources located behind the respective buttons and configured to illuminate the buttons, a light detector circuit configured to measure an ambient light level around the control device, and/or a control circuit configured to control the light sources to adjust surface illumination intensities of the respective buttons in response to the measured ambient light level. Each button may comprise indicia indicating a function of the button. The control circuit set the first button as active and the second button as inactive in response to an actuation of the first button. The control circuit may, based on the measured ambient light level, control the light sources to illuminate the first button to an active surface illumination intensity, and to illuminate the second button to an inactive surface illumination intensity that is less than the active surface illumination intensity.

Abstract: An automatic sensing system includes at least one LED lamp, and at least one sensing control device. Each of at least one LED lamp includes at least three operation modes. The three operation modes includes a closing mode, a low light mode, and a fill light mode. The sensing control device includes an illumination detecting module, a pyroelectric sensing module, a signal processing module, and a lamp control module. The signal processing module is configured for processing the signal data output from the pyroelectric sensing module based on the signal data detected by the illumination detecting module and outputting a control signal. The lamp control module is configured for controlling all of the LED lamps to work in one of the three operation modes so as to make any one of the at least one sensing control device to control all of the LED lamps to work. The invention further includes an automatic sensing control method for LED lighting.

Abstract: A system for backlighting a display uses an open or closed loop and small components that are well suited to high-frequency applications. The system includes multiple LED strings, a high-voltage source, and a low-voltage regulator that has a polarity opposite to that of the high-voltage source. The high-voltage source and the low-voltage regulator provide voltage differences across the LED strings to illuminate them. In one embodiment, the high-voltage source is about 200 VDC, and the low-voltage regulator produces voltages between ?2 VDC and ?30 VDC. Many types of displays, such as those used on LCD televisions and LCD personal computers, can be backlit in accordance with the embodiments.

Abstract: An LED tube lamp is provided. The LED tube lamp includes a lamp tube including a first pin at a first end of the lamp tube and a second pin at a second end of the lamp tube, for receiving an external driving signal; a light strip disposed in the lamp tube, comprising an LED module for emitting light; a driving circuit configured to drive the LED module; a rectifying circuit for rectifying the external driving signal to produce a rectified signal; a filtering circuit coupled to the rectifying circuit, for filtering the rectified signal in order to drive the LED module; a first capacitor coupled to the first pin at the first end of the lamp tube; and a second capacitor coupled to the second pin at the second end of the lamp tube.

Abstract: A dimming and correlated color temperature (CCT) tuning lighting system comprises a controller and multiple light-emitting diode (LED)-based lighting devices. Each lighting device comprises a control circuit, at least two LED driving circuits, and at least two types of LED-based light sources. When the controller receives low voltage dimming and CCT tuning signals from its inputs, it generates pulse-width modulated (PWM) dimming and CCT tuning signals delivered to the control circuit and at least two LED driving circuits in each of the multiple lighting devices, which then individually power the at least two types of LED-based light sources to emit a light with a lighting level and a CCT. The controller may be integrated in each of the multiple lighting devices to further simplify system design, ultimately achieving the lowest cost.

Abstract: An infrared circuit for a single battery and a remote controller using the same are provided. The single battery outputs a battery voltage. The infrared circuit comprises an IR LED circuit, an inductor and a microcontroller. The IR LED circuit is coupled between the battery voltage and a common voltage. The inductor is coupled between the battery voltage and the common voltage. The microcontroller has an I/O port coupled to the inductor and the IR LED circuit. When infrared rays are emitted, the microcontroller controls the battery voltage to charge the inductor through the I/O port, and a continuous current of the inductor forces the IR LED circuit to turn on.

Abstract: The switching power source device obtains a desired DC voltage by controlling the current flowing through a coil by turning on and off a switching element by a PWM control. In the PWM ON period to turn on the switching element by the PWM control, the switching power source device is enabled to switch the switching element by a first pulse signal whose cycle is shorter than the PWM cycle and whose pulse width is gradually increased, in a first period just after the start of the PWM ON period. Further, the switching power source device is enabled to switch the switching element by a PWM signal based on the PWM control after the first period in the PWM ON period has elapsed. According to this approach, it is possible to reduce the harmonic noise.

Abstract: A dimmer system comprising a dimmer having an input interface arranged to receive at least one input for dimming and an output interface for transmitting processed dimming input to at least one LED driver; wherein each of the at least one LED driver is operable to drive a plurality of high powered LED lamp units.

Abstract: A switching power supply device has: a switching output stage configured to generate from an input voltage an output voltage to feed it to a load; a controller IC configured to control the switching output stage such that a feedback voltage applied to an output feedback terminal of the controller IC remains equal to a predetermined reference voltage; a first resistor connected between the output terminal of the output voltage and the output feedback terminal; a second resistor connected between the output feedback terminal and a ground terminal; a sense resistor configured to convert the output current passing between the load and the ground terminal into a sense voltage; and a first diode whose anode is connected to the application terminal of the sense voltage and whose cathode is connected to the output feedback terminal.

Abstract: There was a problem that it was difficult for a semiconductor device in the related art to increase the switching frequency of a step-up circuit, and it was difficult to stabilize an output current and an output voltage. A semiconductor device controls a step-up circuit including an inductor and a drive transistor to drive the inductor. The semiconductor device calculates upper and lower limits which determine the variable range of an input current, based on an output current and an input voltage, controls the switch timing of the drive transistor based on the relation between the upper and lower limits and the magnitude of the input current, and at the same time, corrects the upper and lower limits to be calculated, based on the magnitude of the difference between the output current and a target output current value as an ideal value of the output current.

Abstract: Method and circuits for balancing a first waveform used to drive an LED are disclosed herein. The first waveform has a first cycle with a first amplitude and a second cycle with a second amplitude. An embodiment of the method includes adjusting the first amplitude of the first cycle to match the second amplitude of the second cycle, the result being a second waveform. The LED is driven with the second waveform.

Abstract: In a laser produced plasma (LPP) extreme ultraviolet (EUV) system, a droplet is irradiated by a laser pulse to produce a plasma in a chamber. This generates forces that cause the plasma to destabilize and subsequent droplets to have their flight trajectory and speed altered as they approach the plasma. This destabilization is detectable from oscillations in the amount of EUV energy generated. To reduce the oscillations by stabilizing the plasma and travel of the droplets, a proportional-integral (PI) controller algorithm is used to modify an energy of subsequent laser pulses based on the EUV energy generated in the chamber. By modifying the energy of subsequent laser pulses, the plasma stabilizes, which reduces effects on droplet flight and stabilizes the amount of EUV energy generated, allowing the plasma chamber to operate for longer intervals and to lower the amount of reserve power maintained by a laser source.

Abstract: In a display element such as an organic EL element, deterioration progresses due to light emission, and emission luminance is lowered even if the same voltage is applied to the display element. Therefore, use over time causes variations in luminance of each pixel, thereby a so-called “image burn-in” phenomenon occurs. Given this factor, the invention provides a display device which can reduce the difference in deterioration of a display element in each pixel and suppress variations in light emission of a display element in a pixel. It is prevented that only a specific pixel has a long accumulated lighting time. For that purpose, a gray scale of a display pattern is changed to prevent the difference in deterioration of display element in pixels from increasing. Alternatively, a specific display pattern is prevented from being fixedly displayed in a specific region.

Abstract: A time control system for multiple motors is provided in the present disclosure. The time control system includes an event generating module for generating event information corresponding to an event, a control module for analyzing the event information, a signal selecting module for selecting vibrating information according to the event information, a motor module comprising multiple motors, and a driving module for driving the multiple motors in the motor module to vibrate. The control module is further configured for determining whether the vibrating information need to be delayed, and the time control system further includes a delay module for delaying the vibrating information for a time period before sending the vibrating information to the driving module to delay driving the motor module.

Abstract: The invention relates to a method for generating a multichannel audio signal (600, 700) from a stereo audio signal (100, 200), having the following steps: ascertaining a first panning coefficient (310) and a second panning coefficient (320) of the stereo audio signal; ascertaining a direct signal (515) as well as a first surroundings signal (510) and a second surroundings signal (520) from the first audio signal and the second audio signal and from the first panning coefficient and the second panning coefficient; ascertaining a plurality of repanning coefficients (410, 415, 420) from the panning coefficients, each repanning coefficient of the plurality of repanning coefficients being assigned to an audio channel (580, 585, 590) of a plurality of audio channels of the multichannel audio signal; calculating each direct signal using each of the repanning coefficients of the plurality of repanning coefficients; and converting each audio channel into a playback signal (600, 700) of the multichannel audio signal, e

Abstract: A light emitting diode light strip unit structure is provided. The light emitting diode light strip unit structure includes an illuminating light strip unit which can be connected with an external power source and receive an external control signal independently as a light source. A plurality of illuminating light strip units are assembled and electrically connected with each other. Power supply voltage contacts and working voltage contacts of the illuminating light strip units are electrically connected with the power source to get working electricity. When grounding contacts of the illuminating light strip units complete the ground connection, signal output contacts and signal input contacts of the illuminating light strip units are electrically connected. One of the signal input contacts of the illuminating light strip units is predetermined to receive the control signal to form various types or forms (area) of light sources.

Abstract: Embodiments are provided for a lighting system and a method of installing a lighting system. According to certain aspects, a driver box is configured with a plurality of drivers secured therein. A series of wired connections can couple the plurality of drivers to a plurality of luminaires and can conduct electric power from the plurality of drivers to power the plurality of luminaires. According to aspects, the driver box and its plurality of drivers are located remote from the plurality of luminaires to enable efficient maintenance of the lighting system.

Abstract: The disclosure relates to a method for limiting the starting current of a step-up-converter that is supplied by a DC voltage source. The step-up converter has a first capacitor, a coil connected in parallel to the first capacitor, a second capacitor connected to the coil in series, and a switch connected to the second capacitor in parallel and connected to the coil in series. In a first step, an output voltage of the circuit is measured and the step-up converter is connected to the DC voltage source by closing a power switch that is connected in series to the first capacitor. In a second step, the power switch is opened upon the output voltage increasing by more than a predefined threshold and is maintained open for a predefined time. The first and second steps are repeated until the output voltage reaches a predefined final value.

Abstract: A display device is provided. The display device includes a transmitter, a plurality of first receivers, a plurality of second receiver modules, and a plurality of LED driver groups. The transmitter transmits at least one of a configuration data packet and an image data packet. Each of the configuration and image data packets includes a set of field information. At least one first receiver is coupled to the transmitter. Each of the plurality of second receiver modules is coupled to at least one of first receivers. Each of the plurality of second receiver modules includes a plurality of second receivers. Each of the second receivers reads the set of field information so as to determine whether the set of field information is designated thereto. Each of the plurality of LED driver groups is coupled to the at least one of the second receivers. Each of the plurality of LED driver groups includes a plurality of LED drivers.

Abstract: An LED lighting apparatus according to exemplary embodiments includes a rectification circuit configured to rectify a modulated AC voltage to generate a drive voltage, an LED driving module connected to a plurality of LED groups and configured to apply a drive current to at least one of the plurality of LED groups according to a level of the drive voltage, and a dimming level detector configured to detect a dimming level corresponding to the drive voltage. The LED driving module is configured to compare the detected dimming level to a reference value and block the drive current based on a result of the comparison.

Abstract: The light intensity level of a dimmable LED bulb is set by interruption of the AC signal by the user. The bulb's driver circuit includes a controller having dimmer control logic for controlling the brightness. Optionally, the LED bulb can be dimmed by an external TRIAC dimmer.

Abstract: A system and method for operating one or more light emitting devices is disclosed. In one example, the intensity of light provided by the one or more light emitting devices is adjusted responsive to follow a step change in requested lighting output.

Abstract: An LED array is mounted on a base that is thermally coupled to a heat spreader. At least one aperture is provided between the support area and an edge of the heat spreader. The heat spreader may be coupled to a thermal pad which has sufficient thermal conductivity and is sufficiently thin to allow the thermal resistivity between the heat spreader and a corresponding heat sink to be below a predetermined value.

Abstract: LED-based light source modules can incorporate color tunability and brightness control, allowing a user to select a desired color temperature and/or brightness and to change either or both dynamically. An emitter can include multiple independently addressable groups of LEDs, each emitting light of a different color. By controlling the relative operating current provided to each group, a desired color temperature can be achieved, and by controlling the absolute operating currents, the brightness of the output light can be controlled. Pulse width modulation (PWM) can be used to control the relative and absolute operating currents. Smooth, gradual transitions between brightness and/or color temperature settings in response to changes can be provided.

Abstract: Methods and systems to provide baseline measurements for aging compensation for a display device are disclosed. An example display system has a plurality of active pixels and a reference pixel. Common input signals are provided to the reference pixel and the plurality of active pixels. The outputs of the reference pixel is measured and compared to the output of the active pixels to determine aging effects. The display system may also be tested applying a first known reference current to a current comparator with a second variable reference current and the output of a device under test such as one of the pixels. The variable reference current is adjusted until the second current and the output of the device under test is equivalent of the first current. The resulting current of the device under test is stored in a look up table for a baseline for aging measurements during the display system operation.

Abstract: A system, apparatus, and method for operating one or more drivers of light sources, such as can be used with LED lighting fixtures, wherein main power to the drivers is galvanically isolated from communication functionalities to and from the drivers. In one example, a controller can receive information or send information to the drivers in a galvanically isolated manner. The galvanic isolation can be accomplished in different ways and configurations for high flexibility of design.

Abstract: The present invention discloses an illumination device comprising: a first array of light sources comprising a number of a first type light sources and a number of a second type light sources; a second array of light sources comprising a number of said first type light sources; processing means adapted to controlling the first array by simultaneously controlling the intensity of all of said light sources light sources of the first array; controlling the second array by simultaneously controlling the intensity of all of the light sources light sources of the second array. The present invention discloses further a method for controlling such illumination device.

Abstract: A visible light communication modulation circuit includes a modulation resistance circuit configured to change a current flowing through an LED light source by changing a resistance thereof, a measurement circuit configured to simultaneously measure a voltage applied to the LED light source and the current flowing through the LED light source at least twice until the current is stabilized, an calculation circuit configured to obtain an equivalent series resistance of the LED light source based on at least two sets of voltage values and current values and determine a target resistance of the modulation resistance circuit based on the equivalent series resistance and a predetermined modulation degree, and a conversion circuit configured to change the resistance of the modulation resistance circuit based on the target resistance.

Abstract: Provided is an LED retrofit lamp interfacing with a high intensity discharge (HID) ballast that includes a lighting source having a plurality of light emitting diodes (LEDs), one or more heat sink components dissipating heat generated by the LEDs, and an LED driver configured to operate the LEDs. The LED retrofit lamp is disposed within an HID housing and the HID ballast is electrically connected with the LED driver, and supplies power to the LED driver for operating the LEDs.

Abstract: A light-emitting device and a control method are provided. The light-emitting device is applied to a memory module. The light-emitting device includes at least one memory module board, at least one light-emitting board and an application program unit. The at least one memory module board is connected with a host. Each light-emitting board includes plural light-emitting units and a control unit. The control unit controls a lighting mode of the plural light-emitting units. The control unit is electrically connected with the host through the corresponding memory module board. The application program unit generates a control signal. The control signal is transmitted to the control unit of each light-emitting board through the host. The control unit controls the corresponding light-emitting units according to the control signal.

Abstract: Method for providing hearing assistance to a user by capturing audio signals with a microphone arrangement of a transmission unit; analyzing, by a voice activity detector of the transmission unit, the captured audio signals to judge whether a voice is present close to the microphone arrangement or not, analyzing, by a noise level estimator, the captured audio signals to estimate a surrounding noise level, processing the captured audio signals and transmitting, by a transceiver of the transmission unit, the processed audio signals via a wireless link to a receiver unit, and stimulating the user's hearing, by stimulating means at or in at least one user ear, according to the received audio signals, wherein the audio signals are processed via the wireless link by setting the gain applied to the audio signals according to the close voice/no close voice judgment of the voice activity detector and the estimated surrounding noise level.

Abstract: A method of providing power to solid state lighting is disclosed. The method includes starting a first cycle by providing current to the solid state lighting system, monitoring a solid state lighting system current level, and reducing the solid state lighting system current level when a predetermined peak current level is reached. A second cycle is commenced by increasing the solid state lighting system current level when a predetermined minimum current level is reached. Corresponding apparatus and computer-readable medium are also disclosed.