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 sanitizing replacement LED light bulb provides visible light when powered and also provides ultraviolet light for sanitizing an area around the sanitizing LED replacement light bulb. In some embodiments, the ultraviolet light is emitted only when no motion is detected in the vicinity of the sanitizing LED replacement light bulb to prevent people and animals from being exposed to the ultraviolet light.

Abstract: An LED lighting apparatus includes a first LED light source and a second LED light source included in a first light source group; a third LED light source and a fourth LED light source included in a second light source group; a mode detection circuit configured to determine a mode; a current control unit for serial and parallel connection of the first light source group and the second light source group; balancing circuits for serial and parallel connection of the respective light source groups; and a current path providing circuit for providing current paths. The LED lighting apparatus performs light emission in various states depending on the change of a rectified voltage and the change of a mode.

Abstract: A matchless plasma source is described. The matchless plasma source includes a controller that is coupled to a direct current (DC) voltage source of an agile DC rail to control a shape of an amplified square waveform that is generated at an output of a half-bridge transistor circuit. The matchless plasma source further includes the half-bridge transistor circuit used to generate the amplified square waveform to power an electrode, such as an antenna, of a plasma chamber. The matchless plasma source also includes a reactive circuit between the half-bridge transistor circuit and the electrode. The reactive circuit has a high-quality factor to negate a reactance of the electrode. There is no radio frequency (RF) match and an RF cable that couples the matchless plasma source to the electrode.

Abstract: Examples disclosed herein relate to an analog beamforming antenna for millimeter wavelength applications. The analog beamforming antenna includes a superelement antenna array layer comprising an array of superelements, in which each superelement includes a coupling aperture oriented at a predetermined non-orthogonal angle relative to a plurality of radiating slots for radiating a transmission signal. The analog beamforming antenna also includes a power division layer configured to serve as a feed to the superelement antenna array layer, in which the power division layer comprising a plurality of phase control elements configured to apply different phase shifts to transmission signals propagating to the superelement antenna array layer. The analog beamforming antenna also includes a top layer disposed on the superelement antenna array layer. The top layer may include a superstrate or a metamaterial antenna array. Other examples disclosed herein include a radar system for use in an autonomous driving vehicle.

Abstract: A method for managing a lighting of a zone of interest including at least one object liable to be manipulated by a user, the lighting being carried out by a main lighting device and a secondary lighting device both provided with electroluminescent elements, the method including identifying the user and/or the object; configuring the lighting of the zone of interest according to the profile of the identified user relative to vision and/or at least one characteristic of the identified object, the step including generating an instruction for controlling the lighting properties of the main lighting device and/or of the secondary lighting device according to criteria of visual perception of the object by the user; controlling the main lighting device and/or the secondary lighting device according to the instruction for controlling the lighting properties.

Abstract: A motor vehicle includes headlamps having a plurality of LED light sources, one or more processors, and a memory storing instructions. One or more processors executing the instructions are enabled to receive first data, including at least map data, indicating a road curvature upcoming along a road on which the motor vehicle is traveling. The processors are also enabled to determine a light change, the change adapting a light pattern of the headlamps in at least one of color, intensity or spatial distribution to increase light in a direction of the road curvature ahead of the motor vehicle and shaping light based at least in part on the road curvature. The processors are further enabled to control at least a first plurality of the LED light sources to provide light based at least in part on the determined light change and prior to the motor vehicle reaching the road curvature.

Abstract: A lighting apparatus includes a light module, a driver and a wireless circuit. The light module includes an elongated substrate, a first LED chip layer mounted on a first side of the substrate and a second LED chip layer mounted on a second side of the substrate, and two electrodes on two opposite ends of the substrate. The wireless circuit is used for receiving an external command from an external device to control the driver to adjust the driving power of the light module to mix lights of different optical parameters. The driver has a plugging socket for plugging the wireless circuit.

Abstract: An occupancy sensor with integral light level sensors is configured to turn off or disable peripheral circuits and go into a periodic deep sleep mode to reduce phantom loading. Peripheral circuits include occupancy sensor circuits and relay drive circuits, but may include other circuits such as communication circuits. The sensor may be configured to periodically wake itself up, check ambient light conditions to see if lighting is below the set threshold. If it is not, the sensor goes back to sleep. If it is, then the sensor can power up the occupancy sensor circuit to see if the space is occupied; if not, it can go back to sleep. If the space is occupied, it can turn on other peripheral circuits necessary to control the load.

Abstract: In a plasma processing apparatus of an exemplary embodiment, a radio frequency power source generates radio frequency power for plasma generation. A bias power source periodically applies a pulsed negative direct-current voltage to a lower electrode to draw ions into a substrate support. The radio frequency power source supplies the radio frequency power as one or more pulses in a period in which the pulsed negative direct-current voltage is not applied to the lower electrode. The radio frequency power source stops supply of the radio frequency power in a period in which the pulsed negative direct-current voltage is applied to the lower electrode. Each of the one or more pulses has a power level that gradually increases from a point in time of start thereof to a point in time when a peak thereof appears.

Abstract: An antenna has an antenna main portion formed on a substrate and a facing portion separate and distinct from the substrate. The antenna main portion has a ring shape with a split and has a first end portion and a second end portion which form the split. The facing portion has a first facing portion and a second facing portion which are made of insulating material and apart from each other. The first facing portion has a first principal portion and a first connected portion connected to the first end portion. The second facing portion has a second principal portion facing the first principal portion and a second connected portion connected to the second end portion.

Abstract: The present application provides an intelligent lighting control method based on the number of persons, which includes: counting the number of persons within the target area; dividing the target area into m detection sub-areas, and counting the number of the detection sub-areas where a person is present; selecting the lighting color of the indoor light fixture based on the number of persons within the target area; selecting the lighting mode of the indoor light fixture based on the number of the detection sub-areas where a person is present. The present application adjusts the lighting color, light display mode and illumination brightness of indoor light fixture by analyzing the number of persons within the target area and the degree of dispersion of indoor persons, thereby avoiding the trouble of switching light switch for users and improving the intelligence of the home lighting system, and greatly enhance the user experience, to provide users with a better quality, comfortable living environment.

Abstract: Some embodiments are directed to an occupancy sensor calibration device (100) arranged to repeatedly detect an occupancy in vision data and a concurrent occupancy detection in the occupancy data, determine a location of the detected occupancy in the vision data, and store the location as part of the occupancy sensing region.

Abstract: An LED security light includes an LED load and a motion sensor. The LED load is activated at dusk and deactivated at dawn by a light sensing control unit. At night, the LED load is activated for performing a low level illumination. When a motion signal is detected by the motion sensor, the LED load is switched to perform a high level illumination for a short time period and then resumes to the low level illumination. The low level illumination and the high level illumination are respectively adjustable within respective designed ranges. The LED load is driven by a switching circuitry comprising a driver to output an adequate voltage with constant electric current such that a voltage V across each LED is confined in a range Vth<V<Vmax with Vth being a threshold voltage and Vmax being a maximum voltage avoiding damaging the LED.

Abstract: In a plasma processing apparatus of an exemplary embodiment, a radio frequency power source generates radio frequency power for plasma generation. A bias power source periodically applies a pulsed negative direct-current voltage to a lower electrode to draw ions into a substrate support. The radio frequency power source supplies the radio frequency power as one or more pulses in a period in which the pulsed negative direct-current voltage is not applied to the lower electrode. The radio frequency power source stops supply of the radio frequency power in a period in which the pulsed negative direct-current voltage is applied to the lower electrode. Each of the one or more pulses has a power level that gradually increases from a point in time of start thereof to a point in time when a peak thereof appears.

Abstract: A primary feedback control circuit of a series resonant converter having a transformer, can include: an excitation current simulation circuit configured to sample an excitation voltage of the transformer, and to generate a first voltage representing an excitation current of the transformer; and a feedback control circuit configured to control on and off states of power switches of the series resonant converter in accordance with the first voltage and a second voltage representing a resonant current of the series resonant converter, where the first voltage is controlled to be equal to the second voltage when a secondary current of the transformer is zero.

Abstract: An integrated antenna element includes a top PCB and a bottom PCB arranged in a laminate structure. Radiating surface units are arranged between the top PCB and the bottom PCB. A first balun and a second balun set separately set on the top and bottom PCBs respectively, each for different polarization. The integrated antenna element is capable of transmitting signals to a base station and receiving signals from a base station.

Abstract: Upper lamps each having an upward-convex semicircular shape, and lower lamps each having a downward-convex semicircular shape are placed on left and right sides in a lower part of a front face of a vehicle. In conjunction, the upper lamps and respective lower lamps constitute annular lamps. The upper lamps and respective lower lamps can be illuminated independently of each other.

Abstract: An intelligent lighting system may be installed using pre-existing electrical wiring, such as in a construction or retrofit environment. An intelligent lighting controller and an intelligent lighting fixture may be connected via electrical wiring that is configured for transmitting AC power signals. A commissioning signal may be transmitted to the intelligent lighting fixtures via the electrical wiring. In some cases, the intelligent lighting controller modifies portions of the AC power signal to indicate the commissioning signal. The intelligent lighting fixtures may receive the commissioning signal via the electrical wiring. In some cases, each intelligent lighting fixture that is connected to the electrical wiring, such as each intelligent lighting fixture on a lighting circuit in a room, receives the commissioning signal.

Abstract: Present invention is a wireless device comprising a Van Atta array, said Van Atta array comprising a plurality of antenna pairs, each of said antenna pairs comprising two antenna elements electrically coupled by a signal path of pre-determined length. The wireless device further comprises a measurement unit, said measurement unit is adapted to perform electrical measurements between two measurement points. One of said two measurement points is located at a first pre-determined location on the signal path of one of the antenna pairs, and the other of said two measurement points is located on a second pre-determined location on the signal path of one of the other antenna pairs. The present invention is also a method for retro-reflection of an incident wave using a plurality of antenna pairs.