Bruce Industries, Inc.

Bruce Aerospace, Inc.

Storm S Sears

Arthur T Nemirow

John Martinelli

A light emitting diode (LED) luminaire that produces a uniform light pattern at close distances is provided. The LED luminaire includes a housing, a printed circuit board assembly thermally coupled to the housing, a plurality of high brightness (HB) LED emitters, thermally coupled to the printed circuit board assembly to form a linear array, and a linear reflector assembly, attached to the housing, to concentrate the light generated by the LED emitters over a beam angle formed by the upper surface of the housing and the linear reflector assembly.

High brightness light emitting diode luminaire

A lighting control system includes a plurality of light controllers. Each light controller contains a microprocessor-based intelligence. The plurality of light controllers form a distributed architecture. The microprocessor-based intelligence is operative to store, calculate, and execute complex lighting scenarios. The microprocessor-based intelligence executes a lighting control script during operation. The lighting control script is sufficiently detailed and the light controller is sufficiently intelligent so as to allow the light controller to control lighting without the necessity of a having a present external control architecture.

Lighting control system and method

A fluorescent lamp ballast control circuit includes a ballast controller IC for driving a fluorescent lamp in a half-bridged topology and a control circuit. The control circuit receives an input signal and provides an output signal to the ballast controller IC. The control circuit further receives a feedback signal indicative of the fluorescent lamp current. The control circuit output signal is based on the input signal and the feedback signal. The fluorescent lamp ballast control circuit is used in combination with a fluorescent lamp ballast.

Fluorescent lamp ballast control circuit

A fluorescent lamp electronic ballast includes a DC to DC flyback converter, a commutator circuit, and a current sensor. The flyback converter includes a flyback transformer connected to a diode/capacitor combination, and includes a switch used to produce a flyback waveform that is rectified by the diode and results in a high voltage DC output at the capacitor. The commutator circuit receives the high voltage DC output and converts the high voltage DC output to an AC signal for operating the fluorescent lamp. The current sensor senses a DC lamp current from the output of the flyback converter and provides a current sense signal to the flyback converter. The flyback converter switch is controlled based on the current sense signal. Preferred ballasts advantageously provide a continuously dimmable lamp load, a universal type ballast for a wide range of lamp loads and combinations, and programmed start.

Electronic ballast with DC output flyback converter

A fluorescent lamp electronic ballast for use with fluorescent lamps of the preheat or heated filament type is provided. The electronic ballast includes a multiple output DC to DC converter with a primary winding and a plurality of secondary windings for connecting to a plurality of lamp filaments. Each secondary winding is connected to a lamp filament through a diode/capacitor combination with a current transformer primary located in a high frequency loop. A sensing circuit is connected to a current transformer secondary. A controller is connected to the sensing circuit and controls the filament power supply. Advantages include the ability to predict lamp end of life, detect disconnected filaments and other problems that appear as an open circuit such as loose or misinstalled lamps and prevent arcing, detect smoldering of a heavily carbonized lamp holder, or detect short circuits.

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Dayton, NV, United States of America

Storm S Sears