Abstract: The invention relates to an operating device for loads in the form of lighting means, particularly for LEDs, comprising: a clocked converter (B) having a switching element (20); a control unit (C) for switching the switching element (20) with an operating frequency, the operating frequency of the converter (B) being modulated as a forward or feedforward control.

Abstract: An apparatus to treat a substrate. The apparatus may include a reactive gas source having a reactive gas outlet disposed in a process chamber, the reactive gas outlet to direct a first reactive gas to the substrate; a plasma chamber coupled to the process chamber and including an extraction plate having an extraction aperture extending along a first direction, disposed within the process chamber and movable along a second direction perpendicular to the first direction between a first position facing the reactive gas source and a second position facing the extraction aperture; and a gas flow restrictor disposed between the reactive gas outlet and the extraction aperture, the gas flow restrictor defining a differential pumping channel between at least the plasma chamber and substrate stage.

Abstract: A lighting arrangement (100, 300, 400, 600) configured to illuminate an object (108, 308, 408, 608), the lighting arrangement (100, 300, 400, 600) configured to emit light of a plurality of colors, and a control unit for controlling mixed light emitted by the lighting arrangement is disclosed. The control unit is configured to determine the object (108, 308, 408, 608) to be illuminated and to receive a reflection spectrum of the object. Then, the control unit selects control parameters for mixed light emitted by the lighting arrangement, the mixed light having an illumination spectrum matching the reflection spectrum of the object based on predetermined parameters relating to the type of object. Furthermore, the lighting arrangement illuminates the object based on the selected control parameters provided by the control unit. A corresponding method and a computer program product are also disclosed.

Abstract: The present invention relates to an AC LED driving circuit that can greatly improve flicker-free characteristics and implement an excellent power factor. The AC LED driving circuit according to the present invention includes an LED lighting unit connected to an output terminal of a power supply unit, a current channel switching unit connected to an output terminal of the LED lighting unit to form a current supply channel for the LED lighting unit, a voltage charging unit connected in parallel with a connection line between the power supply unit and the LED lighting unit and configured to charge a voltage from the power supply unit, and have a switching function for the LED lighting unit to selectively supply a charged voltage to the LED lighting unit, and a charged voltage switching control unit for controlling a switching function of the voltage charging unit.

Abstract: In a light emitting device, luminance irregularities caused by fluctuation in threshold of TFTs for supplying a current to EL elements among pixels hinder the light emitting device from improving the image quality. A voltage equal to the threshold of a TFT 110 is held in capacitor means 111 in advance. When a video signal is inputted from a source signal line, the voltage held in the capacitor means is added to the signal, which is then applied to a gate electrode of the TFT 110. Even when threshold is fluctuated among pixels, each threshold is held in the capacitor means 111 of each pixel, and therefore, influence of the threshold fluctuation can be removed. Since the threshold is stored in the capacitor means 111 alone and the voltage between two electrodes is not changed while a video signal is written, fluctuation in capacitance value has no influence.

Abstract: A lighting control device and method are disclosed herein. The lighting control device includes a control unit and a control request unit. The control unit sets up a virtual multiple lighting control unit corresponding to a lighting control command received from a lighting management device. The control request unit selects a wireless light fixture corresponding to a light fixture ID included in the lighting control command, and makes a lighting control request to the selected wireless light fixture. The control unit transfers a response to the lighting control request to the lighting management device, and thus allows a corresponding lighting switch to control the wireless light fixture.

Abstract: Location-Based Addressing (LBA) is a method of controlling and commissioning networked lighting devices. The lighting devices communicate over a wireless network using radio frequency communication protocols. The lighting devices are commissioned or grouped based on their 5 respective locations in a building floor plan or a building architecture. The lighting devices are commissioned to respond to radio frequency communications that correspond to their respective locations. This imposed location-based architecture reduces the amount of transmitted data required to control the lighting devices and, thus, reduces the radio bandwidth required to control the lighting devices. In other words, controlling devices “multicast” instructions and controlled devices “listen” for instructions and act only upon instructions that correspond to their respective location. Hand shaking or two-way communication between the controlling devices and the controlled devices is not required.

Abstract: A circuit for controlling a switch in a power converter in which peak current is regulated to achieve a specified average current through a load. Control logic is operable to monitor a voltage across a sensing resistor such that when the voltage across the sensing resistor reaches or exceeds a threshold value, the control logic generates a signal that causes a switch to be turned OFF.

Abstract: Provided herein is an improved apparatus, method and system for providing a modular LED circuit assembly. Specifically, examples of the present invention include a modular LED circuit which may be scaled and used in a wide variety of form factors. One example of the present invention may provide an apparatus for supporting a light-emitting diode which includes an LED circuit board including a first major surface and a second major surface. The first major surface may include a first contact pad and a second contact pad, where each of the first contact pad and the second contact pad are configured to receive a respective connector from the LED. The second major surface of the LED circuit board may include a first area, a second area, and a third area, where a substrate is attached to the LED circuit board across the third area.

Abstract: Backup battery systems for traffic cabinets that control traffic lights are provided herein. Backup battery systems include a controller operably coupled to 1 or more backup battery panels having rechargeable battery cells. Preferred systems can fit and operate entirely within the traffic cabinet.

Abstract: A solid-state lighting system comprises a plurality of light-emitting devices (e.g., light-emitting diodes) and an alternating current to direct current (AC-DC) converter that converts AC power to DC power for powering the plurality of light-emitting devices. The AC-DC converter is configured to perform AC-DC conversion directly, without the need for or use of a bridge rectifier or step-down transformer. According to one aspect of the invention, the light-emitting devices of the solid-state lighting system are autonomous and individually powered by a plurality of DC power supplies generated from the DC power produced by the AC-DC converter. According to another aspect, a plurality of phase-offset dimmer control signals are generated based on waveform distortions in a dimming signal produced by a conventional dimmer switch. The phase-offset dimmer control signals are used to individually control the dimming of the light-emitting devices.

Abstract: A driver assistance system of a vehicle includes a forward viewing sensor disposed at the vehicle and having a field of sensing forward of the vehicle. A processor is operable to process data captured by the forward sensing sensor to determine the presence of another vehicle. A receiver is disposed at the subject vehicle and operable to receive a wireless communication of information pertaining to other vehicles or traffic participants in the vicinity of the subject vehicle. A control, responsive to determination via processing of captured data that another vehicle is present ahead of the subject vehicle, is operable to adjust a headlamp beam setting of the equipped vehicle, and the control, responsive to determination via received information that another traffic participant is present in the vicinity of the subject vehicle, is operable to adjust the headlamp beam setting of the subject vehicle.

Abstract: An LED driver can include: a rectifying bridge configured to receive an AC current from an electrical ballast, and to generate a DC current; a rectifying and filtering circuit coupled to the rectifying bridge, and configured to rectify and filter the DC current, and to drive an LED load; a power switch coupled between an input of the rectifying and filtering circuit and ground, and configured to be controlled by a switching control signal; a first detecting circuit configured to sample a current that flows through the LED load, and to generate a first detection signal; a second detecting circuit configured to sample an output current of the rectifying bridge, and to generate a second detection signal; and a control circuit configured to generate the switching control signal according to the first and second detection signals.

Abstract: A sensor lighting control system comprises a voltage input received from an AC source so as to be an AC voltage input. A voltage output for connection to lamps. A microcontroller controlling the voltage output and powered by the voltage input. A wireless mesh network transceiver connected to the microcontroller, where the wireless mesh network transceiver is configured to communicate with a wireless mesh network that can receive a global remote control and Internet, and the wireless mesh network transceiver is connected to a mesh network coordinator. Passive infrared motion sensors are connected to the microcontroller, where the passive infrared motion sensors include at least three passive infrared motion sensors. An acoustic sensor for detecting environmental acoustics is connected to the microcontroller, where a triggering level of the acoustic sensor is programmable via the mesh network controller to trigger the microcontroller to activate or deactivate the voltage output.

Abstract: A portable lighting device with a main power circuit for electrically connecting a light source to a portable source of power, the main power circuit including an electric power switch disposed electrically in series with the light source, there also being an inertial sensor and a controller electrically coupled to the portable source of power, the controller including an output for providing a control signal for controlling the flow of power through the electronic power switch and the light source in the main power circuit, the controller also being electrically connected to the inertial sensor, wherein the controller is configured to control the flow of power through the electronic power switch based on one or more signals received from the at least one output of the inertial sensor.

Abstract: Compensating for disturbances in light output by a light source includes sensing light output by a light source and generating a light-sense signal based thereon, detecting a disturbance in the light-sense signal, and generating an output signal to compensate for the disturbance. An LED is driven in accordance with the periodic output signal to thereby compensate for the periodic disturbance.

Abstract: A light emitting device and driving circuit for driving a light emitting circuit in the light emitting device including a plurality of light emitting elements connected in series. The driving circuit includes a first thyristor, a first current limiting resistor, a current detecting resistor, a controllable switch and a voltage dividing circuit. An end of the first thyristor is connected to ground, and another end of the first thyristor is connected to a driving end providing a driving voltage via the first current limiting resistor. The controllable switch has one end connected to the light emitting circuit, another end connected to ground via the current detecting resistor, and a controlling end connected to a first node between the first thyristor and the first current limiting resistor. The voltage dividing circuit has an end connected to the controlling end and has another end connected to a second node between the current detecting resistor and controllable switch.

Abstract: Switches, devices, systems, and methods for using a conductive pull chain on an overhead light where physically touching the chain can turn on and off the light as well as provides dimming levels of the overhead light, and for converting overhead light fixtures to have a pull chain that can become touch sensitive to turn on and off and have different light dimming levels. The pull chains can also be consecutively pulled to different brightness levels with three switch controls. The overhead lights can be wall mounted lights, ceiling mounted lights and/or ceiling fans with light fixtures.

Abstract: Methods and apparatus related to a LED-based lighting unit (10; 110; 210; 310; 410) having a radar for presence detection. A radar circuit (140; 240; 340A; 340B; 440) may be electrically coupled to conductive wiring (25; 125; 225; 325; 425) of the LED-based lighting unit that at least selectively powers the radar circuit and at least selectively powers the LEDs. In some implementations, an antenna coupled to the radar circuit may be formed from the conductive wiring and optionally at least partially isolated from any current flowing through the LEDs.

Abstract: Disclosed is an LED bulb having a current-compensated driving circuit. A compensation current 352 is coupled to a main driving capacitor used to power LEDs and functions to keep the load current more constant. This has dual advantages of saving power and making the light output more uniform. Saving power also means that the circuit runs cooler than without compensation. Additionally this circuit includes an inductor placed in line with a driving capacitor. The inductor functions to reduce rapid current influx to the capacitor during operation of the driving circuit, which reduces EMF and reduces component stress. One benefit of using an inductor is that most of the current absorbed by the inductor is provided back to the circuit during a later portion of the AC cycle, which also limits energy losses by the driving circuit.