Abstract: Examples of the present disclosure are related to systems and methods for voltage interfaces between legacy control systems and light sources. An example voltage interface may include a control loop including a first op-amp, an output loop including a second op-amp, and an optical isolator configured to electrically isolate the control loop from the output loop, the optical isolator being configured to receive an input signal from the control loop and transmit an output signal to the output loop.

Abstract: An automotive headlight is disclosed including: an optical unit including a plurality of optical elements, each optical element having a different central direction; a segmented light-emitting diode (LED) chip including a plurality of LEDs that are separated by trenches formed on the segmented LED chip and arranged in a plurality of sections, each section being aligned with a different respective optical element, and each section including at least one first LED and at least one second LED; and a controller configured to: apply a forward bias to each of the first LEDs, apply a reverse bias to each of the second LEDs, and change a brightness of the first LEDs in any section based on a signal generated by the second LED in that section.

Abstract: A method for adjusting a voltage supply device for a multichannel LED control and power supply device having a determination of a number of LEDs that are connected to a multichannel LED control and power supply device or are a part of this device and that are switched on and supplied with current by the multichannel LED control and power supply device at a point in time, and a setting of a voltage with which the multichannel LED control and power supply device is supplied as a function of the number of LEDs determined that are switched on and supplied with current.

Abstract: An electronic device may have a display mounted in a housing. The housing may have a stand that supports the housing on a support surface or may have other shapes. The display may have pixels that display an image. The display may also have a two-dimensional array of light-emitting devices such as light-emitting diodes that supply backlight illumination for the pixels. An array of temperature sensors may be overlapped by the pixels. Control circuitry may maintain historical backlight aging information during operation of the display. The aging information may include information on output brightness levels of the light-emitting diodes and light-emitting diode operating temperatures.

Abstract: A system of networked lighting devices includes a group of lighting device fixture controllers connected in a communication chain. The communication chain provides for transfer of data packets between the lighting device fixture controllers and a central controller. Each fixture controller includes a first power input that receives power from a primary power source, and a priority switch that is configured to switch the fixture controller from the primary power source to a source of DC power upon detecting failure of the primary power source. The source of DC power is sufficient to power the fixture controller and enable the fixture controller to continue to pass a stream of data to other controllers in the communication chain, but it is not sufficient to power the fixture controller's associated lighting device.

Abstract: A system for providing power over Ethernet illuminated signage is provided. The system includes receiving lighting instructions via an Ethernet compatible communications protocol, translating those instructions to a lower bandwidth, slower protocol while passing through DC power. Illumination fixtures are powered by the passed-through power and operated in accordance with the translated instructions.

Abstract: Methods and apparatus for matching an impedance of a process chamber with an impedance of an RF power source. In some embodiments, a method comprises dynamically matching a load impedance of the process chamber with an impedance matching circuit coupled between an RF power source and the process chamber, the impedance matching circuit configured to compensate for changes in the load impedance to match an impedance of the RF power source over a wide range of load impedances; filtering power feeding back from the process chamber with a first filter positioned between the matching circuit and the process chamber, the first filter configured as a wide bandpass filter; and filtering residual signals with a second filter positioned between the matching circuit and the RF power source, the second filter configured as a low pass filter.

Abstract: Systems, devices and methods are described herein. A device includes a power stage circuit, a switch and a first circuit. The switch is electrically coupled to the power stage circuit. The first circuit is electrically coupled to the power stage circuit and the switch and has a single output. The first circuit is configured to provide a first circuit output voltage at the single output. The first circuit output voltage has a first level on a condition that the power stage circuit is conducting at a peak current level. The first circuit output voltage has a second level on a condition that the power stage circuit is not conducting.

Abstract: An LED device for use with an AC voltage power source configured such that at least one LED emits light during a positive phase of power provided from an AC power supply and at least one LED emits light during the negative phase of power provided from an AC power supply. The LED device includes a first power connection lead and a second power connection lead, both leads capable of being connected to and receiving power from an AC power supply.

Abstract: A lighting unit for illuminating a habitat is provided. The lighting unit includes a housing and a light emitter. The operating parameters of the lighting unit may be adjusted to mimic different natural conditions.

Abstract: A lighting control system for controlling a cumulative light emitted by a lighting fixture having a plurality of LED light sources may comprise a plurality of LED drivers adapted to be coupled to a respective one of the LED light sources and configured to control an intensity of the respective LED light source, and a controller configured to transmit a single digital message for controlling the cumulative light emitted by the lighting fixture. Each of the plurality of LED drivers is configured to adjust the intensity of the respective LED light source to a preset intensity in response to the single digital message transmitted by the controller.

Abstract: The present disclosure relates generally to techniques for adjusting a light source to provide radiant energy having a particular spectral characteristic, and more particularly, to a system and method of selectively controlling and calibrating LEDs within a light fixture to produce radiant energy so that the light fixture emits light at a desired color.

Abstract: A driver circuit receiving wireless communication over a wireless network is disclosed. The driver circuit includes a lighting load, a main driver, and an auxiliary driver. The lighting load is selectively illuminated based on an output voltage being provided to the lighting load that is at least a forward voltage of the lighting load. The wireless communication is indicative of whether the lighting load is to be illuminated. The main driver is for controlling current and voltage within the driver circuit such that if the wireless communication indicates the lighting load is to be illuminated, then the current delivered to the lighting load is regulated by the main driver, and if the wireless communication indicates the lighting load is not to be illuminated, then the output voltage delivered to the lighting load is controlled by the main driver is below the forward voltage.

Abstract: A powering circuit for a diode light source includes an inductor charged through an on/off switch. The charging occurs during a charging cycle for a controllable amount of time when the on/off switch is closed. The energy of the charged inductor is used to power the semiconductor light source by opening the on/off switch. In such a driving configuration, the ringing is nearly constant and thus may be suppressed using an appropriately configured circuit.

Abstract: Systems and methods for lighting fixture grouping and configuration in a distributed lighting system equipped with a wireless lighting network. An example method comprises: receiving, via a graphical user interface (GUI) rendered by a lighting network management application of a distributed lighting system, a command to associate a lighting fixture with a lighting fixture group; transmitting, to the lighting fixture, an update command specifying an identifier of the lighting fixture group and a value of a fixture configuration parameter; receiving, from the lighting fixture, an acknowledgement of the update command; incrementing a counter of lighting fixtures associated with the lighting fixture group; and displaying the counter in a visual association with a GUI element representing the lighting fixture group.

Abstract: The present disclosure is a system that has a network comprising a power over ethernet switch and at least one light communicatively coupled to the network via the POE switch such that the at least one light receives power from the POE switch. Further, the system comprises a processor configured for transmitting power and light control data to the at least one light over the network via the POE, the light control data comprising commands for changing the color of the at least one light.

Abstract: The present invention discloses a light-emitting diode light string control system, which comprises: a switching unit having a power input end, a power output end, and a controlled end; the power output end is connected to the light-emitting diode light string; a control unit, and the control unit is connected to the controlled end of the switching unit; a second power generating unit, and the second power generating unit is connected to the light-emitting diode light string.

Abstract: A ripple suppressor includes a constant current generation circuit and a voltage regulation circuit. The constant current generation circuit is coupled to a light-emitting diode chain, wherein the constant current generation circuit is used for generating a detection voltage, and generating a constant current to the light-emitting diode chain. The voltage regulation circuit is coupled to the light-emitting diode chain and the voltage regulation circuit, wherein the voltage regulation circuit makes the constant current generation circuit generate the constant current according to the detection voltage and a compensation value, or makes the constant current generation circuit generate the constant current according to the detection voltage, wherein the compensation value is changed with an average voltage generated by the voltage regulation circuit, and the average voltage corresponds to a voltage of an end of the light-emitting diode chain.

Abstract: The present invention is directed to a compact light-emitting diode arrangement which can be used generically but, by reason of the compact design, is advantageous in particular for use in a vehicle. For instance, the compact light-emitting diode arrangement can be used e.g. as interior lighting in a car. The present invention is also directed to a vehicle component having the compact light-emitting diode arrangement. Furthermore, a method for producing the compact light-emitting diode arrangement is proposed as is a computer program product including control commands which implement the proposed method.

Abstract: An LED device for use with an AC voltage power source configured such that at least one LED emits light during a positive phase of power provided from an AC power supply and at least one LED emits light during the negative phase of power provided from an AC power supply. The LED device includes a first power connection lead and a second power connection lead, both leads capable of being connected to and receiving power from an AC power supply.