Abstract: A load control device for controlling the intensity of a lighting load, such as a light-emitting diode (LED) light source, may include a power converter circuit operable to receive a rectified AC voltage and to generate a DC bus voltage, a load regulation circuit operable to receive the bus voltage and to control the magnitude of a load current conducted through the lighting load, and a control circuit operatively coupled to the load regulation circuit for pulse width modulating or pulse frequency modulating the load current to control the intensity of the lighting load to a target intensity. The control circuit may control the intensity of the lighting load by pulse width modulating the load current when the target intensity is above a predetermined threshold and control the intensity of the lighting load by pulse frequency modulating the load current when the target intensity is below the predetermined threshold.

Abstract: The present application provides a color LED driving circuit, which comprises a set of switches and a color controller. The switch assembly has a first switch and a second switch, respectively having a first terminal, a second terminal and a control terminal. The first terminal of the first switch is configured to be coupled to a first LED load, and the first terminal of the second switch is configured to be coupled to a second LED load. The color controller comprises a first controller and a second controller. A ground terminal of the first controller is coupled to ground. The first controller is used to generate an output signal according to a PWM signal, and transmit the output signal to the second controller.

Abstract: Disclosed herein is a lighting device with adjustable technical effects using few extraction electrodes to keep the cost low and the device simple, the device including: at least one filament group, wherein each filament group includes at least one filament, each filament includes at least one first light emitting unit and at least one second light emitting unit, which are connected in anti-parallel, and the first light emitting unit and the second light emitting unit have different light attributes from each other; and a light attribute adjusting unit, which is connected to both ends of each filament group to adjust a light attribute of light emitted from the lighting device, wherein the light attribute of the emitted light can be different from the light attribute of any light emitting unit.

Abstract: Disclosed is a strip lighting system that receives lighting control signals digitally over a conductor which also provides power to the strip lighting system. The strip lighting system includes a controller which receives the control signals operates switches which cause current to flow through one or more light emitting diodes and also a non-lighting load to permit the strip lighting system to have a constant load characteristic to a lighting system controller controlling the strip lighting system.

Abstract: A processing system including at least one processor may detect at least one dark zone in a vicinity of a user, determine at least one lighting feature for an illumination of the at least one dark zone in accordance with a user profile of the user, identify at least one light source to provide the illumination of the at least one dark area in accordance with the at least one lighting feature that is determined, and transmit an instruction to the at least one light source to provide the illumination of the at least one dark zone in accordance with the at least one lighting feature that is determined.

Abstract: A system and method for an accent lighting system is provided. The system includes a plurality of underwater luminaires each having a plurality of light emitting diodes, and a junction box controller housing a plurality of electrical components for generating electrical signals for controlling the plurality of underwater luminaries. The junction box controller can be mounted to an electrical conduit and a plurality of cables can connect the plurality of underwater luminaires with the junction box controller. An underwater luminaire can include a heat sink and a flexible circuit board having a plurality of light emitting diodes mounted on the heat sink. The flexible circuit board transfers heat from the light emitting diodes to the heat sink. The underwater luminaire can also include a wiring harness for connecting the underwater luminaire to a cable.

Abstract: A lighting apparatus includes a surge voltage protector, a first rectifier, a first DC-DC converter, a first DC filter, a first constant current source, a second rectifier, a second DC-DC converter, a second DC filter, a second constant current source, a first PWM generator, a second PWM generator, a dimmer controller, a first light source and a second light source. The surge voltage protector is coupled to an external power for relaying an AC power. When there is a surge voltage is detected, the surge voltage protector disable routing the AC power. There are two or more paths of power circuits each generating a limited power. These power circuits are placed in the same container to simplify the overall design.

Abstract: A display driver circuit for controlling a display panel having a plurality of light-emission diode (LED) strings includes a plurality of current regulators and a control circuit. Each of the plurality of current regulators is configured to control one of the plurality of LED strings. The control circuit, coupled to the plurality of current regulators, is configured to generate a plurality of pulses in a plurality of pulse width modulation (PWM) signals and output each of the plurality of PWM signals to a respective current regulator among the plurality of current regulators. Wherein, the plurality of pulses are scrambled.

Abstract: A plasma torch employs a dielectric resonator excited at separate locations with phase shifted signals to provide more uniform current flow through the resonator. High-power operation is possible while protecting the dielectric by using a combination segregated spiral flow and linear flow cooling air at different rates. Microwave leakage from the plasma resonant chamber is contained by conductive metal chokes.

Abstract: An LED lamp includes an elongated housing, LED arrays, a rechargeable battery, a controller circuit, two drivers, a charging circuit, and a battery backup user interface. The first driver converts an external power to drive the LED array whereas the second driver draws power from the rechargeable battery to drive the LED arrays during power outage. The charging circuit charges the rechargeable battery during normal operation. The battery backup user interface includes a battery charging indicator indicating the charging status of the rechargeable battery. The battery backup user interface also includes a battery shutoff switch configured to allow a user to enable or disable the rechargeable battery. In some cases, the battery backup user interface further includes a test button configured to allow the user to trigger a test of the rechargeable battery.

Abstract: An antenna module radiates radio waves upon receiving a radio-frequency signal output from an RFIC. The antenna module includes flat radiating elements that radiate radio waves in a first polarization direction, feed conductors that each supply a radio-frequency signal from the RFIC to an associated one of the radiating elements, and a ground electrode disposed opposite the radiating elements. As viewed from the RFIC, frequency characteristics of an impedance of the radiating element are different from frequency characteristics of an impedance of the radiating element. Under a condition a frequency band in which a return loss is less than or equal to a predetermined value is defined as an operable band width in each of the radiating elements, the operable band width of the radiating element partially overlaps the operable band width of the radiating element.

Abstract: One example described herein includes a light-emitting diode (LED) driver system. The system includes an error amplifier configured to compare an input voltage with a reference voltage to generate a control voltage. The system further includes an amplifier output stage configured to control an output current through a first current path and a shunt current through a second current path based on the control voltage. The amplifier output stage comprises a slew-rate controller configured to control a slew-rate of the shunt current. The shunt current can be provided through a shunt resistor in the second current path and added to the output current to provide a total current through an LED string.

Abstract: An optical device includes: an addressable LED group having ARGB LED units which are connected in series and controlled serially by a specific sequence of digital signals to display colors; an input interface circuit, configured to sense a user's control state; a control circuit, coupled to the addressable LED group and the input interface circuit; a processing circuit, for providing an optical operation; a specific signal port of the processing circuit, coupled to the addressable LED group and coupled to the input interface circuit through the control circuit, configured to receive the specific sequence of digital signals and then transmit the specific sequence of digital signals into an input of a first addressable LED unit in the addressable LED group, and configured to receive an output control signal generated from the input interface circuit by sensing the user's control state.

Abstract: A circuit for sharing current between parallel LEDs or parallel strings of LEDs, and a method of use of the same, are disclosed herein. The circuit for sharing current between parallel LED pathways can include a first LED pathway, a first transistor coupled to the first set of LEDs and that can control a first current through the first set of LEDs, and a first measurement node having a first sensed voltage. The circuit can include a second LED pathway, a second transistor coupled to the second set of LEDs and that can control a second current through the second set of LEDs, and a second measurement node having a second sensed voltage. The circuit includes a first differential amplifier and a second differential amplifier, each of which can compare sensed voltage and can apply a voltage to a gate of one of the first and second transistors.

Abstract: An LED driving system and a closed-loop control method for LED driving are provided; the LED driving system includes an LED load, a constant-current control module, an electrolytic capacitor, a discharging-voltage measuring module, a bus-voltage measuring module and a charging-current control module, wherein the charging-current control module is connected to an output of the discharging-voltage measuring module, the bus-voltage measuring module and a lower plate of the electrolytic capacitor; the charging current of the electrolytic capacitor is adjusted based on the control signal of the discharging-voltage measuring module and the measured voltage of the bus-voltage measuring module, wherein the charging current of the electrolytic capacitor is reduced by an subtraction operation performed by the addition and subtraction counter, and the charging current of the electrolytic capacitor is increased by an addition operation performed by the addition and subtraction counter.

Abstract: A linear lighting device may include an elongated housing that defines a cavity. The linear lighting device may include plurality of emitter printed circuit boards configured to be received within the cavity. Each of the plurality of emitter printed circuit boards may include a plurality of emitter modules mounted thereto. Each of the plurality of emitter printed circuit boards may include a control circuit configured to control the plurality of emitter modules mounted to the respective emitter printed circuit board based on receipt of one or more messages. The linear lighting device may include a total internal reflection lens for each of the plurality of emitter printed circuit boards. The total internal reflection lens may be configured to diffuse light emitted by the emitter modules of the plurality of emitter printed circuit boards.

Abstract: The present disclosure discloses A lamp controller, comprising a DC power supply and a switch unit, wherein an output end of the DC power supply is electrically connected to the switch unit, the switch unit comprises a first switch set, a second switch set and a control module for controlling the first switch set and the second switch set to be turned on alternately, an output end of the control module is electrically connected to the first switch set, and the output end of the control module forms a second set of switch circuit after being electrically connected to the second switch set; and the lamp controller further comprises a control unit, which is electrically connected to the switch unit; the switch unit further comprises: a first toggle switch.

Abstract: A lighting apparatus includes a first light source, a second light source and a driver. The first light source has multiple first LED modules. The second light source has multiple second LED modules. The driver controls the first light source and the second light source to generate an output light of a required mixed color temperature. The driver selects a first subset of the multiple first LED modules and a second subset of the multiple second LED modules to generate a first output light with a first color temperature. The driver selects a third subset of the multiple first LED modules and a fourth subset of the multiple second LED modules to generate a second output light with a second color temperature. The first subset is not equal to the third subset. The second subset is not equal to the fourth subset.

Abstract: The invention relates to a matrix light source comprising a plurality of elementary light sources with light-emitting semiconductor elements, and a common substrate that is in contact with an integrated circuit. The integrated circuit is configured to delay, for a predetermined duration, the light-up of the elementary sources, upon receiving a light-up command.

Abstract: The lighting management system includes: a judgement unit configured to judge whether or not a lighting state around a vehicle based on a first lighting apparatus and a second lighting apparatus meets a first reference for a light amount and a second reference for at least one of a lighting range, a lighting color, and a flashing state; a first control unit configured to control the light amount of at least one of the first lighting apparatus and the second lighting apparatus so that the lighting state is brought to meet the first reference; and a second control unit configured to control at least one of the lighting range, the lighting color, and the flashing state of at least one of the first lighting apparatus and the second lighting apparatus so that the lighting state is brought to meet the second reference.