Abstract: Methods, apparatus and systems are disclosed to generate light control information. An example apparatus comprises a beat tracking network to determine a length of time between a first media onset and a second media onset, a light drive waveform generator to compare the length of time to a time threshold, the time threshold corresponding to a desired time between consecutive light pulses, when the time threshold is not satisfied, increase the length of time, the increased length of time corresponding to light pulse spacing, and generate light control information based on the light pulse spacing, the light control information to cause the consecutive light pulses, and an effect engine to generate intensity information based on a first amplitude of the first media onset and a second amplitude of the second media onset, an amplitude of the consecutive light pulses corresponding to the intensity information.

Abstract: Photosynthetically active photon flux density (PPFD) provided to plants from a grow light may be calculated based on light-canopy distance measurements, intensity measurements around the plants, and a known shape or distribution of light at the measured distance from the grow light. A controller and a method of controlling one or more grow lights can employ closed-loop techniques that repeatedly measure and adjust light until a desired PPFD is achieved and then maintained.

Abstract: An interface currents channeling circuit may be used to convert two current channels of a conventional two-channel driver into three driving currents for the three strings of LEDs. By doing so, the same two channel driver can be used for applications requiring just two LED arrays as well as three LED arrays.

Abstract: A current measurement circuit is disclosed. The current measurement circuit includes first and second circuit branches coupled to a circuit node through which current is to be measured. During a first period, the first circuit branch converts the current into a first voltage. During a second period, the second circuit branch converter the current into a second voltage. An analog-to-digital converter is configured to convert the first and second voltages into digital values indicative of the measured current. A control circuit is configured to alternately select one of the first and second branches during the generation of the digital values.

Abstract: The invention relates to a luminous device (5) and a method for managing said device (5), comprising LED lighting means (51), a dissipative electric load (52) adapted to increase an electric power dissipated by the device (5) when the LED lighting means (51) are emitting light, and current interrupting means (53) configured for dynamically interrupting the flow of current through said dissipative load (52) when the LED lighting means (51) are emitting light, so as to reduce the electric power dissipated by said device (5).

Abstract: A system using a handheld device for programming lighting instruments, which is operable on the DALI system, includes a wireless control module electronically connected and integrated with the DALI system; and a handheld device, having two-way communication with the wireless control module wirelessly. The handheld device has a graphical user interface wherein the graphical user interface has functional blocks. One functional block, which programs groups of functional blocks, includes menus. The screen of each menu is divided into first and second display areas. The handheld device accesses the initialized addresses of the lighting instruments in the DALI system from the wireless control module and displays the non-programmed icons of lighting instruments in the DALI system in the second display area. By dragging the lighting instrument icons displayed in the second display area into the first display area, programming groups of the lighting instruments can be accomplished.

Abstract: An LED light strip bendable in multiple directions is disclosed. The LED light strip bendable in multiple directions includes a core wire having a core wire groove arranged along the direction of said LED light strip in the middle, and at least two main wires arranged in said core wire on both sides of said core wire groove; a plurality of LED light strings arranged in said core wire groove at intervals, which include at least LED light sources, electronic components and connecting wires, and the first and last connecting wires of each LED light string are connected in parallel between said two main wires; an insulation wrap layer wrapped outside said core wire; wherein, said two main lines have a wavy curve structure. By implementing the present invention, multi-directional bending of the light strip can be realized, thereby expanding the application range of the product and convenience of use.

Abstract: System and method for controlling one or more light emitting diodes. For example, the system includes: a voltage detector configured to receive a rectified voltage associated with a TRIAC dimmer and generated by a rectifying bridge and generate a first sensing signal representing the rectified voltage; a distortion detector configured to receive the first sensing signal, determine whether the rectified voltage is distorted or not based at least in part on the first sensing signal, and generate a distortion detection signal indicating whether the rectified voltage is distorted or not; and a phase detector configured to receive the first sensing signal and generate a phase detection signal indicating a detected phase range within which the TRIAC dimmer is in a conduction state based at least in part on the first sensing signal.

Abstract: A lighting device (10) is disclosed that comprises a light mixing chamber (14) at least partially delimited by a first surface (30) carrying a plurality of light sources (28) spatially distributed across said first surface and a second surface (31) arranged to be illuminated by said light sources, said second surface comprising light transmissive regions (33) delimiting light exit areas (32) having a higher light transmissivity than the light transmissive regions, said light transmissive regions exhibiting isotropic luminance and light exit areas exhibiting anisotropic luminance when illuminated by said light sources.

Abstract: The application relates to an over-temperature protection circuit of an LED driving power supply. The over-temperature protection circuit comprises a temperature detection circuit for sensing a temperature change; a switch control circuit connected to the output end of the temperature detection circuit and controlling the on-off of the circuit according to the output signal of the temperature detection circuit; a shunt circuit connected to an output end of the switch control circuit and shunting current when the switch control circuit is in an on state; a current detection circuit connected to an output end of the shunt circuit and changing a current detection signal according to an output current of the shunt circuit; the output end of the current detection circuit is connected with the feedback loop. The application has the advantages of low cost, stable performance, little environmental influence and high precision.

Abstract: An apparatus for an LED driver with a silicon-controlled dimmer, can include: a bleeder circuit coupled to a DC bus of the LED driver; and a controller configured to control the bleeder circuit to draw a bleeder current from the DC bus when a conduction angle of the silicon-controlled dimmer is less than an angle threshold, in order to maintain a conduction state of the silicon-controlled dimmer.

Abstract: A constant power backup power supply for LED lighting fixtures is disclosed. The power supply includes a storage battery that is charged while an AC power source is in an ON condition. When AC power transitions to an OFF condition, a capacitor bank charged by the battery supplies current to the primary side of a flyback converter operating in discontinuous conduction mode. The secondary side of the flyback converter supplies constant output power to the LED lighting fixture for an arbitrary output voltage within a predetermined range.

Abstract: Display systems for displaying digital content. The display systems have one or more LED-based lighting channels adapted to generate a circadian-inducing blue light output in first operational mode and a less-circadian-inducing blue light output in a second operational mode. The circadian-inducing blue light can have a first circadian-stimulating energy characteristic related to the associated first spectral power distributions of light generated in the first operational mode, and the non-circadian-inducing blue light can have a second circadian-stimulating energy characteristic related to the associated second spectral power distribution of light generated in the second operational mode. Disclosure methods of generating digital display content with the display systems described herein. The methods can generate a circadian-inducing blue light output in first operational mode and a less-circadian-inducing blue light output in a second operational mode.

Abstract: Systems and methods for an adaptive power drive in an illumination system are disclosed herein. An example method includes (1) analyzing, by one or more processors data in a memory to determine a configuration of one or more LEDs; (2) obtaining, by one or more processors, illumination control instructions for operating the one or more LEDs during one or more illumination cycles; (3) controlling, by one or more processors, one or more switches of an illumination unit in accordance with illumination control instructions; (4) determining, by one or more processors, a current requirement for operating the one or more LEDs in accordance with the illumination control instructions; and (5) setting, by one or more processors, a current control set point of an LED driver to the current requirement.

Abstract: A method for managing the operation of a group of a plurality of connected objects includes exchanging information between two of the connected objects of the group. The information relates to a state of each connected object participating in the exchanging of information. The method also includes triggering an action on a connected object participating in the exchanging of information. The triggering is based on the information received by this object.

Abstract: System and method for controlling one or more light emitting diodes. For example, the system includes: a current regulator including a first regulator terminal and a second regulator terminal, the first regulator terminal being configured to receive a diode current flowing through the one or more light emitting diodes, the current regulator being configured to generate a sensing signal representing the diode current, the second regulator terminal being configured to output the sensing signal; a bleeder controller including a first controller terminal and a second controller terminal, the first controller terminal being configured to receive the sensing signal from the second regulator terminal, the bleeder controller being configured to generate a first bleeder control signal based at least in part on the sensing signal, the second controller terminal being configured to output the first bleeder control signal.

Abstract: A biological lighting system to provide temporally- and spatially-modulated photon flux output and spectral power distributions to plants on a circadian and circannual basis, or circadian and life cycle basis, to maximize effective and efficient growth in a horticultural setting. The photon flux or irradiance output and the spectral power distribution are modulated to match circadian and circannual rhythms, with individual or multiple luminaires controlled through one or more controllers. Different lighting spectra can be employed depending on the direction of illumination. The photon flux or irradiance output and the spectral power distribution may be set as best suited for any particular plant species, and the system is also useful for raising animals.

Abstract: A LED driving circuit includes a power factor correction circuit receiving a rectified mains voltage and providing output to a DC voltage bus, a string of LEDs connected in series, a voltage converter receiving input from the DC voltage bus and providing output to the string of LEDs, and a microcontroller. The microcontroller receives a plurality of digital feedback signals from the voltage converter, controls the voltage converter based upon a user desired brightness level and the plurality of digital feedback signals, and receive a plurality of feedback signals from the power factor correction circuit. Based on the plurality of feedback signals, the microcontroller operates the power factor correction circuit in transition mode where the user desired brightness level is above a threshold brightness, and operates the power factor correction circuit in discontinuous mode where the user desired brightness level is below the threshold brightness.

Abstract: A lighting apparatus includes a first LED module, a second LED module, a third LED module, a constant current generator, a first switch, a third switch and a driver. The constant current generator is used for generating a constant current according to a major PWM signal. The first LED module and the third LED module are connected in parallel and share the constant current. The constant current is adjusted by changing a major duty ratio of the major PWM signal. The driver is used for generating the major PWM signal, a first PWM signal and a third PWM signal. The first color temperature profile, the second color temperature profile and the third color temperature profile have different spectrum distributions.

Abstract: An LED controller is used with a video source and at least one LED unit, and includes a control signal generator and a driver. The control signal generator performs pulse width modulation based on a first clock signal, a second clock signal and a data signal, which is generated by the video source, to generate at least one control signal. The first and second clock signals are independent of a vertical synchronization signal that is generated by the video source. The driver generates, based on the at least one control signal, at least one drive signal that is related to light emission of the at least one LED unit.

Abstract: A light emitting device includes: a first light emitting element and a second light emitting element, each having a peak emission wavelength in a range of 430 nm to 480 nm; a first light transmissive member disposed on an upper face of the first light emitting element and containing a first phosphor; a second light transmissive member disposed on an upper face of the second light emitting element; and an encapsulant covering the first light transmissive member and the second light transmissive member and containing a second phosphor. The first light emitting element and the second light emitting element are configured to be independently driven. A chromaticity of light exiting from the first light transmissive member differs from a chromaticity of light exiting from the second light transmissive member.

Abstract: A light fixture is configured to produce an output via a driver circuit to drive an array of LED light sources. Controlling the light fixture includes receiving a first light intensity value related to a light intensity value for the array of LED light sources, determining a first dimming curve based on the first light intensity value and a color temperature value to determine a first value, receiving a second light intensity value related to a light intensity value for the array of LED light sources at which the color temperature value for the output of the light fixture is achieved, wherein the second light intensity value is different than the first light intensity value, determining a second dimming curve based on the second light intensity value and the color temperature value to determine a second value, wherein the second dimming curve is different than the first dimming curve.

Abstract: An LED lighting device or LED lamp comprises one or more LED packages, and a switch comprising at least two selectable positions. At least one selectable position corresponds to a set operating mode and one selectable position corresponds to a configurable operating mode. When the switch is in the selectable position corresponding to the set operating mode, responsive to receiving an indication of user input for selecting user-selected operating light qualities, the one or more LED packages continue to be operated in accordance with the predefined operating light qualities corresponding to the set operating mode. When the switch is in the selectable position corresponding to the configurable operating mode, responsive to receiving an indication of user input for selecting user-selected operating light qualities, operation of the one or more LED packages is modified in accordance with the user-selected operating light qualities.

Abstract: A dimmable light source for emitting white overall radiation may include a dimmer and a light-emitting diode. The dimmer may vary a current intensity of a current for operating the light-emitting diode during the operation of the light source. The LED may include a semiconductor layer sequence to emit primary radiation, and the LED may further include a conversion element configured to at least partially convert the primary radiation into secondary radiation having a first emission band with a first emission maximum ranging from 400 nm to 500 nm and a second emission band with a second emission maximum ranging from 510 nm to 700 nm. A relative intensity of the first emission band may reduce with decreasing current intensity of the current for operating the LED, and a relative intensity of the second emission band may increase with decreasing current intensity of the current for operating the LED.

Abstract: System and method for controlling one or more light emitting diodes. For example, the system includes: a voltage detector configured to receive a rectified voltage associated with a TRIAC dimmer and generated by a rectifying bridge and generate a first sensing signal representing the rectified voltage; a distortion detector configured to receive the first sensing signal, determine whether the rectified voltage is distorted or not based at least in part on the first sensing signal, and generate a distortion detection signal indicating whether the rectified voltage is distorted or not; and a phase detector configured to receive the first sensing signal and generate a phase detection signal indicating a detected phase range within which the TRIAC dimmer is in a conduction state based at least in part on the first sensing signal.

Abstract: Lighting control systems are disclosed, which are configured to detect a rate at which a total current from a current driver is being changed. The total current is an amount of current for a plurality of LED channels comprising a first LED channel and a second LED channel. The systems are also configured to control a first current to the first LED channel and a second current to the second LED channel, the first current and the second current each being a portion of the total current. The controlling comprises: when the rate is detected as being a first slope, changing a ratio of the second current to the first current; and when the rate is detected as being a second slope different from the first slope, keeping the ratio constant while the total current is adjusted according to the dimmer control.

Abstract: In a method of sensing a threshold voltage of a driving transistor in a pixel included in a display panel, a first initial level of a data voltage, a level of an initialization voltage and a second initial level of a reference voltage that are used for sensing the threshold voltage of the driving transistor are set. The reference voltage is different from the initialization voltage. The threshold voltage of the driving transistor is sensed by applying the initialization voltage, the data voltage having the first initial level and the reference voltage having the second initial level to the driving transistor. When a predetermined condition is not satisfied by variation in the threshold voltage of the driving transistor, at least one of the first initial level and the second initial level is changed. The threshold voltage of the driving transistor is sensed again based on a result of changing at least one of the first initial level and the second initial level.

Abstract: Systems and methods for modifying a municipal fixture to affix endpoint devices, provide a power to such devices, and managing network traffic between and among such devices, including managing upstream transmission and efficiently propagating desired state changes through the network. The systems and methods described herein generally use a plurality of mesh radio transmitters which are configured for peer-to-peer data exchange to propagate system state changes to one or more uplink gateways. The gateways may then aggregate this data and transmit it over a wide area network to a server or server farm for processing, analysis, and other use. That data may also be viewed in real time by user devices, and instructions and commands may also be relayed to the individual IoT devices in the mesh network via such user devices.

Abstract: The present invention improves power supply efficiency during power line communication. This electronic device, comprising at least a portion of a constant current circuit connected to a predetermined load, has a circuit unit that controls the voltage to be applied to the predetermined load on the basis of a state related to the predetermined load. The circuit unit has: a path (a path from end to end via a constant voltage diode) in which at least a portion of the voltage to be applied to the predetermined load is generated when a constant current flowing in the constant current circuit flows therein; and a field effect transistor serving as a switch unit for switching between short-circuiting the path and undoing the same. A control unit controls the voltage to be applied to the predetermined load by switching the state of the switch unit.

Abstract: The present disclosure provides systems for generating tunable white light. The systems include a plurality of LED strings that generate light with color points that fall within blue, yellow/green, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.

Abstract: The present disclosure provides methods for generating tunable white light with controllable circadian energy performance. The methods use a plurality of LED strings to generate light with color points that fall within blue, yellow/green, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output. Different light emitting modes can be selected that utilize different combinations of the plurality of LED strings in order to tune the generated white light.

Abstract: The present disclosure provides methods for generating white light. The methods use a plurality of LED strings to generate light with color points that fall within blue, yellow/green, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.

Abstract: Technical solutions are described for controlling operation of a multiphase electric machine using a signal generator configured to generate n number of duty cycle signals of a combination pulse width modulation (PWM) scheme comprising of a continuous PWM scheme and a noncontinuous PWM scheme, with n being an integer greater than 3. A blending coefficient value determines relative weights of each of the continuous and noncontinuous PWM schemes in forming the combination PWM scheme. A blending function determines relative weights of each of the continuous PWM scheme and the noncontinuous PWM scheme used to generate the duty cycle signals. The bending function is calculated piecewise based on a difference between the blending coefficient value and two threshold values. The signal generator uses each of the duty cycle signals to control switching of a DC power to a corresponding phase of the multiphase electric machine.

Abstract: A display substrate includes a base substrate; a plurality of light emitting blocks on the base substrate, a respective one of the plurality of light emitting blocks in a subpixel region; a unitary cathode layer electrically connected to the plurality of light emitting blocks, the unitary cathode layer extending substantially throughout a display area of the display substrate; an organic auxiliary cathode layer electrically connected to the unitary cathode layer, the organic auxiliary cathode layer including an organic conductive polymer material; and a metallic auxiliary cathode layer limited in a groove defined by the organic auxiliary cathode layer and in direct contact with the organic auxiliary cathode layer and in direct contact with the unitary cathode layer. The metallic auxiliary cathode layer is limited in an inter-subpixel region of the display substrate. The organic auxiliary cathode layer is at least partially in the inter-subpixel region of the display substrate.

Abstract: The present invention is a lighting device with color temperature control function, including two modulated power input ends, a rectifier that rectifies the modulated power and outputs a rectified modulated power, a first LED module and a second LED module that have different color temperatures, and a dimming control unit. The modulated power includes multiple cycles of a sinewave, and each cycle of the sinewave has a firing angle. The dimming control unit reads a lighting modulation command code that is carried in the modulated power according to the firing angle of each cycle, and controls the luminous intensity of the first and second LED modules respectively to perform a designated combination of color temperature of lighting effect.

Abstract: A multi-track illumination content editing system allows creation or alteration of content using multiple input tracks representing illumination or other electromagnetic emissions and auxiliary content representing presentations other than electronic emissions, e.g., images, audio, or video. The editing system may particularly perform mixed media editing that manipulates both illumination and auxiliary content so that output illumination or auxiliary tracks depend on both illumination and auxiliary input tracks.

Abstract: A device includes an analog current division circuit configured to divide an input current into a first current and a second current, and a multiplexer array including a plurality of switches to provide the first current to a first of three colors of LEDs and the second current to a second of three colors of LEDs simultaneously during a first portion of a period, the first current to the second of three colors of LEDs and the second current to a third of three colors of LEDs simultaneously during a second portion of the period, and the first current to the first of three colors of LEDs and the second current to the third of three colors of LEDs simultaneously during a third portion of the period.

Abstract: Disclosed are systems and methods for automatically detecting an error in commissioning of a system device in a physical environment comprising a plurality of system devices, comprising the steps: (i) receiving (1352), by each the plurality of system devices, a wireless signal from one or more neighboring system devices; (ii) determining (1354), by each the plurality of system devices, a strength of the received wireless signal; (iii) receiving (1356), from an installer (610), a request to commission a first system device within the physical environment, wherein the request comprises an intended location of the first system device; (iv) receiving (1358) the commissioning request and determined wireless signal strengths from at least one system device neighboring the first system device, wherein the location of the at least one system device neighboring the first system device is known; (v) determining (1360), based at least in part on the received wireless signal strength from the at least one neighboring sys

Abstract: LED light source, comprising a series connection of at least two LED strings, wherein each of the at least two LED strings corresponds to a single LED or comprises at least two LEDs, wherein at least one ohmic resistive element is connected in series with a first LED string of the at least two LED strings, and at least one switching element is connected in parallel to the series connection of the at least one ohmic resistive element and the first LED string, wherein the at least one switching element is configured to bypass in its conductive state the series connection of the at least one ohmic resistive element and the first LED string.

Abstract: Methods, systems, and apparatus, including computer program products, for handling reservations including receiving a reservation request from a patron for a reservation time, reserving space at a venue based on the request, determining whether the patron is present at the venue at the reservation time and, if not, providing a notice to remind the patron of the reservation.

Abstract: A method of controlling a power supply electrically coupled to a dimmer includes receiving a current sample value of a plurality of sample values corresponding to dimmer levels, determining whether there is a change in the dimmer levels, determining a dynamic weight of the current sample value based on the determining whether there is a change in the dimmer levels, filtering the plurality of sample values based on the dynamic weight to generate a plurality of filtered values, and generating a control signal based on the filtered values for transmission to the power supply.

Abstract: A headlamp lighting device (100) is mounted on a vehicle. The headlamp lighting device (100) stores definition information in which a plurality of lamp devices arranged on the vehicle are presented and, for each of the lamp devices, one or more light sources configuring the lamp device and a control value for controlling each of the light sources are presented. Also, for each of the lamp devices, the headlamp lighting device (100) controls lighting of each of the light sources configuring the lamp device by referring to the definition information.

Abstract: A LED lighting system and assembly is provided allowing for adjustment of zones on an LED lamp. Each of the zones is independently adjustable and configured to illuminate different areas surrounding an LED lamp. The LED lighting assembly may be controlled remotely or by mesh operations as herein described.

Abstract: A biological lighting system to provide temporally- and spatially-modulated photon flux output and spectral power distributions to plants on a circadian and circannual basis, or circadian and life cycle basis, to maximize effective and efficient growth in a horticultural setting. The photon flux or irradiance output and the spectral power distribution are modulated to match circadian and circannual rhythms, with individual or multiple luminaires controlled through one or more controllers. Different lighting spectra can be employed depending on the direction of illumination. The photon flux or irradiance output and the spectral power distribution may be set as best suited for any particular plant species, and the system is also useful for raising animals.

Abstract: A lamp group switching control device for switching and controlling a first lamp group and a second lamp group is provided. When receiving a first power source for driving the first lamp group, the lamp group switching control device controls that only the first lamp group provides a first light signal regardless of whether a second power source for driving the second lamp group is received. When the first power source is not received and the second power source is received, the lamp group switching control device controls that only the second lamp group provides the second light signal.

Abstract: A lighting management system includes communications circuitry, processing circuitry, and a memory. The memory stores instructions, which, when executed by the processing circuitry cause the lighting management system to receive a message from a lighting fixture via the communications circuitry, the message indicating a proximal presence of a detected mobile device to the lighting fixture, and performing one or more actions in response to receipt of the message. By performing the one or more actions upon receipt of the message as described above, a lighting system may be provided with additional functionality that enhances the lighting system.

Abstract: Methods, apparatus, systems and articles of manufacture are disclosed to adjust device control information. The example apparatus comprises a light drive waveform generator to obtain metadata corresponding to media and generate device control information based on the metadata, the device control information to inform a lighting device to enable consecutive light pulses; an effect engine to apply an attack parameter and a decay parameter to consecutive light pulses corresponding to the device control information, the attack parameter and the decay parameter based on the metadata to affect a shape of the consecutive light pulses; and a color timeline generator to generate color information based on the metadata, the color information to inform the lighting device to change a color state.

Abstract: This disclosure is directed to circuits for controlling voltage from a voltage source to one or more light emitting diodes. The circuit includes a first transistor comprising a power switch that is configured to define a load current path from the voltage source to the one or more light emitting diodes. The circuit also includes a second transistor, which can be controlled based on the light emitting diodes, wherein the second transistor is configured to turn off when one or more of the lights emitting diodes exhibit an electoral short. The first transistor is configured to turn off in response to the second transistor turning off so as to provide short circuit protection for the circuit.

Abstract: An LED security light includes a light emitting unit, at least one sensing unit, a loading and power control unit and a power supply unit configured with a first power source and a second power source, wherein a power level detector and a power switching circuitry are installed to select and connect at least one of the first power source and the second power source to the light emitting unit. The light emitting unit is activated at dusk and is deactivated at dawn. When the first power source is used, the LED security light generates a first level illumination. When the second power source is used, the LED security light generates a second level illumination. The first power source is a solar power while the second power source is a backup battery.

Abstract: In driving a segmented LED loading, an alternating current (AC) voltage is rectified into a direct current (DC) voltage; the DC voltage is regulated into an input voltage and the input voltage is maintained higher than a lowest voltage used for lighting at least one LED segment of the segmented LED loading; the input voltage and a current flowing through the segmented LED loading is detected to generate a switch control signal and a current control signal; respective operation states of each of a plurality of switches of a LED segment switch module are controlled by the switch control signal to control each LED segment of the segmented LED loading as power-supply state or no-power-supply state; and the current of the segmented LED loading is regulated based on the current control signal.