Abstract: A calibration method comprising, for each of one or more light sensors: (a) under influence of one or more substantially non-zero illumination levels in the target environment, using the light sensor to measure the sensed light level corresponding to each of these one or more illumination levels; (b) receiving a template light level value corresponding to each of the one or more illumination levels, representing the light level at a target location in the target environment substantially removed in space from the location of the light sensor, each of the one or more template light level values being assumed for the environment rather than measured by a light meter; and (c) determining a relationship between the sensed light level and the light level experienced at the target location, based on an evaluation of the one or more sensed levels relative to the one or more template light level values.

Abstract: An electrical circuit, in some embodiments, comprises a control circuit having a plurality of switches and an electrical load having a plurality of load components. A first of the plurality of switches is configured to control a first of the plurality of load components. A second of the plurality of switches is configured to control a second of the plurality of load components synchronously with the first of the plurality of switches.

Abstract: A lighting control console for controlling a lighting system includes digital adjusting commands being generated in the lighting control console that are transmitted to the lighting system via data links. The lighting control console includes at least one slide control for inputting operating commands via linear displacement of a control knob protruding from the upper side of the console housing. The upper side of the console housing includes a slit for each slide control. The slide control is fastened to said electronic circuit board and not to any fastening point on the console housing.

Abstract: Certain embodiments described herein are directed to generators that can be used to sustain a plasma. In some embodiments, the generator comprises an oscillation circuit configured to electrically couple to an induction device and provide power to the induction device in an oscillation mode to sustain the inductively coupled plasma in a torch body, the circuit configured to provide harmonic emission control during sustaining of the inductively coupled plasma in the torch body in the oscillation mode of the generator.

Abstract: A dimmable driver for an LED light fixture allows multiple types of dimmers to be used with the light fixture. The dimmable driver may be disconnected from one type of dimmer and subsequently connected to another type of dimmer without having to replace or otherwise adjust the driver for each dimmer. Multiple types of dimmers may be connected to dimmable driver at the same time and the dimmable driver may use dimming signals from one or several of these dimmers. In some embodiments, the dimmable driver is configured to accommodate a step dimmer, a 0-10 V dimmer, and a phase-cut dimmer. Other dimmers and dimming protocols may be accommodated by the dimmable driver in alternative embodiments. Such an arrangement maximizes flexibility for lighting specifiers, contractors, and distributors while minimizing potential errors, costs, delays, and obsolete inventory.

Abstract: The invention provides a driver circuit for driving an LED arrangement which uses a switch mode power converter, for example a flyback ringing choke converter, which comprises a main switch (e.g. bipolar transistor) and a sub-circuit for generating a current for the control terminal of the main switch. The sub-circuit in some examples makes use of an auxiliary winding as a voltage supply, and further comprises a ramp circuit for generating a ramp voltage from the voltage supply and a voltage follower, such as a control transistor, connected between the voltage supply and the control input of the main switch. By ramping up the current of the main switch, the losses arising as a result of the current flowing to the control input of the main switch are reduced. One set of examples makes use of a flyback ringing choke converter, which enables low cost implementation and good efficiency. The driver is able to receive a wide range of input voltages, by ensuring that the power loss is kept low.

Abstract: A method controls a light barrier where light is emitted from an optical transmitter to an optical receiver. The method checks whether reception levels fall below a lower threshold or exceed an upper threshold to determine whether the light barrier is interrupted. The thresholds initially are adjusted based on a predetermined minimum reception level, with each threshold being a fraction of the minimum reception level. An allowable reception level range is defined between the minimum level and a predetermined saturation level. The method checks whether the current reception level is outside the allowable reception level range, and, if this is the case, calibrates a parameter for operating the optical transmitter based on the minimum reception level and/or the saturation reception level. The parameter is calibrated by calculating a gradient of one characteristic curve of the light barrier and readjusting the parameter to a target value calculated based on the gradient.

Abstract: Herein is disclosed a dual-pathway LED dimmer, including a first reference voltage node; a load including one or more light emitting diodes, the load connected in series with the first reference voltage node; a second reference voltage node; a first load pathway and a second load pathway, connected in parallel between the load and the second reference voltage node; wherein the first load pathway includes a first inductor and a first transistor, connected in series; and wherein a second load pathway includes a second inductor and a second transistor, connected in series; and one or more controllers, configured to control the first transistor and the second transistor.

Abstract: An LED light fixture having at least two LED light sources, each having a different correlated color temperature, with a manually controllable correlated color temperature switching assembly to control an electric circuit to select a particular LED light source or combination of LEDs, and a concealment for selectively rendering the manually controllable color correlated color temperature switching assembly inaccessible or for rendering the switching assembly accessible for operation.

Abstract: The present invention relates to a motor vehicle driving aid system, the vehicle comprising a lighting device intended to illuminate a road scene at the front of the vehicle. The vehicle includes means for detecting an oncoming vehicle, control means receiving information from the detection means, and means for reducing dazzling of the driver of the motor vehicle caused by the light emitted by the oncoming vehicle. These means are controlled by the control means, and means for the management of the lighting device designed to increase the illumination of the lighting device of the vehicle and to avoid dazzling of the driver of the oncoming vehicle, these means being controlled by the control means.

Abstract: Embodiments of the present invention generally relate to simplified, high voltage, tungsten halogen lamps for use as source of heat radiation in a rapid thermal processing (RTP) chamber or other lamp heated thermal processing chambers. Embodiments include a lamp design that includes an external fuse while reducing the number of part and expense of prior art lamps. In addition, embodiments of the lamps described herein provide sufficient rigidity to handle compressive forces of inserting the lamps into a heating assembly base, while maintaining a simplified fuse design.

Abstract: An AC-driven LED lighting apparatus includes: a triac dimmer to generate a modulated AC voltage by modulating a phase of AC power according to a selected level of dimming; a rectifying circuit to generate drive voltage by full-wave-rectifying the AC voltage having the phase modulated by the triac dimmer; a dimming level detector to detect a dimming level according to the drive voltage; a phase cut reference setting unit for setting a phase cut reference value; and a LED driving module for constant-current-controlling a plurality of LED groups by comparing the detected dimming level with the phase cut reference value, wherein the light emitting element driving module comprises a LED current blocking unit for blocking a drive current supplied to the plurality of LED groups when the dimming level is lower than the phase cut reference value.

Abstract: The invention concerns a device for lighting the passenger compartment of a motor vehicle. The device includes a variable light-emitting element adapted to generate selectively a light beam having at least one variable characteristic, and a device for measuring the ambient temperature in the passenger compartment of the vehicle. A device for controlling the variable light-emitting element is configured to control the emission of the light beam and to vary the variable characteristic of the light-emitting element as a function of the ambient temperature measured by the device for measuring.

Abstract: A lighting device which supplies a light-emitting element with a current modulated based on a visible light communication signal includes: a DC power supply circuit which supplies the light-emitting element with a first voltage that is a DC voltage; and a current control circuit which (i) includes a current control element connected in series to the light-emitting element, (ii) switches the current control element between a first state and a second state based on the visible light communication signal, the first state and the second state differing in electrical impedance, and (iii) adjusts, to a constant current value corresponding to a constant current instruction signal, a current flowing through the light-emitting element in a period in which the current control element is in the first state, by controlling the current control element.

Abstract: A light unit (10) including one or more lighting devices, in particular one or more LEDs is disclosed. The light unit comprises input terminals (12, 14) for connecting the light unit to an external power supply (16) and for receiving an input voltage (V10) from the external power supply. A first lighting device and at least one additional lighting device (22, 24) connected in series to the input terminals and a charge storage device (26) is connected in series to the first lighting device. The first lighting device (20) and the additional lighting device (22, 24) forms a tapped linear driver that the number of the lighting device (20, 22, 24) being turned on depending on an amplitude of the input voltage (V10).

Abstract: Lighting methods and systems to enhance the browsing behaviors of shoppers in a manner intended to be primarily subconscious include illumination of a targeted area, such as a typical retail display, with a tunable spectrum lamp that slowly cycles through different illumination spectra such that color rendering of illuminated target is deliberately varied for subtle arousal of the visual senses. The illumination spectra, and the rates at which spectral conditions are changed, are both chosen as such that multi-colored objects in the targeted area change in appearance in a barely noticeable way, such that shoppers may find their visual attention redirected, seemingly at random, to a wider variety of products on display. Color spectrum changes also may be controlled in coordination with predefined packaging colors to create quasi-animation effects.

Abstract: A compact radio-frequency quadrupole ‘RFQ’ accelerator for accelerating charged particles, the RFQ accelerator comprising: a bunching section configured to have a narrow radio-frequency ‘rf’ acceptance such that only a portion of a particle beam incident on the bunching section is captured, and wherein the bunching section bunches the portion of the particle beam; an accelerating section for accelerating the bunched portion of the particle beam to an output energy; and, a means for supplying radio-frequency power.

Abstract: A lamp control device includes a converter configured to provide an output voltage and an internal voltage; a lamp including an LED module which has a plurality of LED channels, and configured to emit light in correspondence to the output voltage of the converter; and a controller configured to operate by using the internal voltage of the converter, control the output voltage of the converter to be retained at a level equal to or higher than a predetermined level, by using feedback voltages of the plurality of LED channels, and control channel currents of the plurality of LED channels to be regulated in correspondence to memory values which are set in advance.

Abstract: A system for managing emergency lighting is generally described. In particular, the present disclosure relates to self-tests and predictive life expectancy operations of emergency lighting systems. Further, the present disclosure relates to an automated system and method for performing self-tests and predicting emergency lighting fixture life expectancy. In the exemplary embodiments, emergency lighting system tests may be automatically scheduled, carried out, and evaluated.

Abstract: A first vehicle includes a light and a controller in communication with the light. The controller is programmed to detect a second vehicle positioned to sense the light, transmit a first message to the second vehicle requesting observation of the light, actuate the light to change state in response to a second message from the second vehicle, and receive a third message from the second vehicle specifying a state of the light.