Abstract: In one example, a system includes a controller, a transformer including at least a primary winding and an auxiliary winding, a voltage supply, and a driver. The controller is configured to output an indication of a target current or a target power. The voltage supply is configured to receive an electrical current having a constant average current over time from the auxiliary winding and to output variable electrical current for supplying the controller. The voltage supply includes a capacitor for storing energy and a current sink for consuming a current. The driver is configured to selectively energize the primary winding for supplying one or more load devices based on the target current or the target power and selectively energize the primary winding for operating the voltage supply based on an indication of a voltage at the voltage supply.

Abstract: A tractor headlight device according to the present invention is configured from a pair of high-beam units and a pair of low-beam units, wherein the high-beam units and the low-beam units are respectively disposed at top and bottom. High-beam lamp lenses configuring the high-beam units are formed extending from the front to the sides of a hood. Low-beam lamp lenses configuring the low-beam units are formed along a front grill under the high-beam units.

Abstract: A light system for a stadium, the light system comprising: at least one sensor configured to determine light intensity values for multiple locations within the stadium; at least one electronically controllable luminaire configured to generate light directed towards at least one location of the multiple locations within the stadium based on a received control parameter; a controller configured to receive the light intensity values from the at least one sensor, further configured to determine a light intensity difference based on the light intensity values from the multiple locations within the stadium, and configured to select the at least one electronically controllable luminaire and generate the control parameter for the least one electronically controllable luminaire based on the light intensity difference to attempt to reduce the light intensity difference.

Abstract: An operating circuit for energizing a lamp (5) comprising at least one light emitting diode (6) has a primary side (11) and a secondary side (12) that is electrically isolated from the primary side. The operating circuit comprises a clocked converter (14) that has a primary coil and a secondary coil (18). The operating circuit further comprises a detection device (20) for determining an output voltage (Vout) of the operating circuit; the detection device (20) comprises an inductor (21) which is located on the primary side (11) of the operating circuit and which is inductively coupled to the secondary coil (18).

Abstract: An LED driving circuit includes a charging-discharging circuit and a constant-current unit. The charging-discharging circuit is coupled to an AC current source, and includes an impedance, a diode and an energy storing circuit. The energy storing circuit is coupled to the impedance, the diode, and an LED unit. The constant-current unit is coupled to the charging-discharging circuit in series, and is arranged to regulate current. During the positive half cycle of the AC current source, the constant-current unit charges the energy storing circuit via the impedance; and during the negative half cycle of the AC current source, the energy storing circuit provides the LED unit with a discharging current via the diode, making the driving current of the LED driving circuit remain stable even when the AC current changes from the positive half cycle to the negative half cycle, thus preventing the flicker effect.

Abstract: A vehicle interior illumination device includes: illumination parts respectively provided in a plurality of positions in a vehicle; and a control part which controls turning on and off operations and illuminating colors of the illumination parts. The control part allows the illumination parts respectively to emit lights by different colors of a same type relating to a theme selected by the control part.

Abstract: A fixture comprising a light sensor and an actuator for assigning the fixture to at least one zone. A fixture comprising a light source, a motion sensor and a light sensor. A fixture comprising a motion sensor, a light sensor and a wireless transmitter (optionally also a wireless receiver). A fixture configured to detect light brightness values over a time-span, and identify a period of time with smallest average brightness. A fixture configured to dim at a first rate when a motion sensor senses no motion for a designated period of time, and optionally also configured to brighten at a second rate when the motion sensor detects motion. A fixture configured to dim to not less than a designated percentage unless motion is detected during the dimming. A lighting control system, comprising fixtures and an actuator configured to assign fixtures to zones. Also, other lighting control systems and methods.

Abstract: Different wavelength conversion materials, or different concentrations of a wavelength conversion material are used to encapsulate the light emitting elements of different colors of a hybrid light emitting module. In an embodiment of this invention, second light emitting elements (170) of a particular color are encapsulated with a transparent second encapsulant (120;420;520), while first light emitting elements (160) of a different color are encapsulated with a wavelength conversion first encapsulant (110;410;510). In another embodiment of this invention, a particular second set of second and third light emitting elements (170,580) of different colors is encapsulated with a different encapsulant than another first set of first light emitting elements (160).

Abstract: An LED lighting system includes a plurality of light-emitting diodes (LEDs), at least one driver to drive the plurality of LEDs, and at least one heat sink to dissipate thermal energy produced by the LEDs. The heat sink communicates a thermal resistance value or other heat dissipation characteristic information to the LED lighting system. A power adjustment module of the LED lighting system modifies a current flow to the plurality of LEDs based on the characteristics of the heat sink.

Abstract: A lighting system of a vehicle is provided herein. A light sensor is coupled to a front windshield and is oriented to face in a vehicle-forward direction. A light source is disposed inside the vehicle and a controller is configured to adjust a brightness of the light source based on a light level measured by the light sensor.

Abstract: Lighting systems and methods implementing toggle control are provided. In one example implementation, a lighting system includes a first LED array having one or more LED devices and a second LED array having one or more LED devices. The system further includes a single throw circuit interrupter configured to receive power from a power source. The system further includes a power conversion circuit configured to convert an input power received via the toggle switch to a power output for the first LED array and the second LED array. The power conversion circuit is configured to control a power distribution ratio between the first LED array and the second LED array based at least in part on a detected toggle input (e.g., a toggle pattern) implemented using the single throw circuit interrupter.

Abstract: A backup lamp is provided herein. The backup lamp includes a housing and a lens. A plurality of light sources is disposed in upper and lower positions of the housing. The plurality of light sources in the upper position are angularly offset from the plurality of light sources in the lower position. A plurality of reflectors surround each light source and have a focal axis that is offset from each of the remaining reflectors. A controller is configured to selectively illuminate the light sources in a plurality of illumination patterns.

Abstract: A method for controlling an amount of power delivered to an electrical load may include controlling an average magnitude of a load current towards a target load current that ranges from a maximum rated current to a minimum rated current in a normal mode, and controlling the average magnitude of the load current below the minimum rated current in a burst mode. The burst mode may include at least one burst mode period that comprises a first time period associated with an active state and a second time period associated with an inactive state. During the burst mode, the method may include regulating a peak magnitude of the load current towards the minimum rated current during the active state, and stopping the generation of at least one drive signal during the inactive state to control the average magnitude of the load current to be less than the minimum rated current.

Abstract: The present disclosure includes an apparatus, which includes: a transparent cover, a housing to form a first compartment with the transparent cover, one or more light emitting diodes disposed inside the first compartment, and a lighting driver module disposed inside the first compartment and electrically coupled with the one or more light emitting diodes, the lighting driver module including a rectifier to convert an AC signal to a DC signal, a current sensor to measure current supplied to the one or more light emitting diodes and to provide information related to the measured current, a first switching device electrically coupled with the rectifier and with the one or more light emitting diodes, and being capable of being controlled by a controller to interrupt or allow a transmission of the DC signal to the one or more light emitting diodes, based on the information provided by the current sensor.

Abstract: The prevent invention provides a light-emitting device for providing a flash light source comprising a light-emitting module and a control module. The light-emitting module comprises a circuit substrate and a plurality of light-emitting elements disposed on the circuit substrate and electrically connected to the circuit substrate. The control module comprises a semiconductor switch element having a MOSFET for turning the light-emitting elements on or off, wherein the semiconductor switch element is electrically connected to the light-emitting elements thereby the light-emitting elements can flash via the semiconductor switch element alternately turning on and off the light-emitting elements.

Abstract: The present invention relates to a system, method, and apparatus for powering intelligent lighting networks. The power for the intelligent lighting network is supplied by Power-over-Ethernet (PoE) switches and/or Mid-Spans, which are conditioned by a powered device to distribute power tuned specifically for each, at least one light emitting diode (LED) fixture. The Power-over-Ethernet switch and/or Mid-Span with associated router and wireless access point can be used to communicate with, and power a sensor network that collects data relevant to the intelligent lighting network. Optionally, the Power-over-Ethernet switch and/or Mid-Span can be used to communicate with, and power a network of sensors that collects data relevant to the space the intelligent lighting network is operating in, or can be used to communicate with and power a network of AC wall plugs that can be turned on and off, and various switches, relays, and PLCs, RFID systems, USB hubs, etc.

Abstract: A discharge lamp driving device includes: a discharge lamp driving unit which supplies drive power to a discharge lamp; and a control unit which controls the discharge lamp driving unit according to a waveform of the drive power. The waveform has n launching periods and a low-power mode lighting period. The n launching periods include a first launching period in which the drive power increases toward refresh power that is equal to or above drive power in a low-power mode and equal to or below rated power, and (n?1) launching periods in which the drive power is maintained at the refresh power. The control unit, in an x-th launching period, supplies the discharge lamp with a drive current having a drive frequency equal to or below a drive frequency of a drive current supplied to the discharge lamp in an (x?1)th launching period.

Abstract: Emergency lighting devices and methods are disclosed. An emergency lighting device includes a first group of solid state emitters configured to emit light of a first color. The emergency lighting device also includes a second group connected in series to the first group and configured to emit a second color. The groups are configured to receive a normal operation current from an LED driver at the input end of the first group and output the normal operation current at the output end of the second group. In an emergency, the first group receives an emergency operation current from an emergency LED driver at an emergency input and outputs the emergency operation current at an emergency output located.

Abstract: The object of the present invention is to provide a method for producing a micro-plasma with biocompatibility. The produced micro-plasma is a low temperature, adjustable micro-plasma with low energy consumption. The method provides a device comprising a first gas storage unit, a second gas storage unit, a unit for producing the micro-plasma, and a power supply unit.

Abstract: A dimming control method and circuit thereof are provided. After receiving a TRIAC signal with at least one positive/negative half cycle waveforms, the turning points of the positive/negative half cycles are detected to obtain the conduction angles of the positive/negative half cycle waveforms. Then, a pulse width modulated signal with the symmetrical positive and negative half cycle waveforms is rebuilt to control a lamp. Therefore, the disclosure can solve the flickering issue of the lamp.