摘要:
A powerline communication control system for controlling a lighting unit, such as an LED lighting unit, including a master controller for receiving lighting unit control inputs from a lighting controller and generating corresponding lighting unit command outputs in a lighting system command format and transmission mode and superimposing the lighting unit command outputs onto the power distribution system and at least one lighting slave unit for receiving the lighting command signal, separating the lighting command signal from the power signal and for providing lighting unit control commands to the at least one lighting unit to control illumination thereof.
摘要:
A powerline communication control system for controlling a lighting unit, such as an LED lighting unit, including a master controller for receiving lighting unit control inputs from a lighting controller and generating corresponding lighting unit command outputs in a lighting system command format and transmission mode and superimposing the lighting unit command outputs onto the power distribution system and at least one lighting slave unit for receiving the lighting command signal, separating the lighting command signal from the power signal and for providing lighting unit control commands to the at least one lighting unit to control illumination thereof.
摘要:
A system and process for controlling power delivered to an electrical load, such as lighting system, to controllably effect operation of the load (e.g., intensity of illumination). In at least some embodiments, the system and process interpret a user-adjustable setting of a typical electronic low voltage (ELV) dimmer control device that is otherwise isolated from facility AC power. An electrical stimulus, such as a relatively low power AC or DC voltage, is applied at one or more externally accessible terminals of the ELV dimmer control. An electrical response of the dimmer control to the stimulus is measured at one or more externally accessible terminals of the dimmer control. The electrical response varies according to the applied electrical stimulus and a user-adjustable setting of the dimmer control. An indication of the setting of the user-adjustable control is determined from the measured electrical response, and used to correspondingly dim a lighting source.
摘要:
A light emitting diode (LED) lighting fixture having an elongated casing, an array of LEDs mounted on a printed circuit board and a holographic film element providing a near lossless optical element for redistributing the light emission patterns from adjacent ones of the LEDs into an array light emission pattern wherein the emitted light in a region of the array light emission pattern is comprised of a sum of overlapping light emission patterns of a plurality of the LEDs. The casing is divided into a lighting element compartment containing the LED printed circuit board and holographic film element and a power supply compartment containing at least one power supply, each being thermally isolated from the other.
摘要:
A light emitting diode (LED) lighting unit including power supply housing accommodating a power supply and an LED array housing defining an internal compartment and a lens sealing the internal compartment. A different respective LED array is mounted on at least one of a number of common printed circuit boards accommodated within the internal compartment. The different LED arrays provide different illumination, controlling one or more illumination features such as beamwidth, color and color temperature. Physical isolation is also provided between the LED array housing and the power supply housing to allow for controlled or otherwise restricted access to one or more of the different housings. In at lest some embodiments, one or more of the LED array housing and power supply housing are configured with a centrally located chimney, drawing in cooling air from a space provided between the to housings to facilitate cooling of the lighting unit.
摘要:
A light emitting diode (LED) lighting unit including power supply housing accommodating a power supply and an LED array housing defining an internal compartment and a lens sealing the internal compartment. An LED array and an LED control circuit are mounted on a printed circuit board, which is accommodated within the compartment. The rear surface of the LED array housing includes a heat transfer element. At least one of the LED array and power supply housings has a chimney extending therethrough from a front to rear surface. The rear surface of the LED array housing is spaced from the front surface of the power supply housing to define and airflow space therebetween. During operation of the LED lighting unit, air flows into the airflow space and toward a central axis of the LED lighting unit before flowing out through the chimney to facilitate removing heat from the LED lighting unit.
摘要:
A system for controlling power delivered to a lighting system for controlling illumination. The system includes a TRIAC with an input capacitor connected in parallel to a phase delay circuit including a series combination of a potentiometer and a capacitor. A ramp voltage output from the timing circuit is connected through a DIAC to a gate input of the TRIAC. The TRIAC is connected between a DC voltage source and an electrical load. In response to the DC source, the input power storage capacitor, the phase delay timing circuit and the input terminal of the TRIAC have a direct current output voltage higher than a DIAC breakover voltage, used to drive a gate input of the TRIAC. The TRIAC operates in relaxation oscillation mode such that a frequency of oscillation of the TRIAC circuit, as controlled by the timing resistor, can be used to control power to the electrical load.
摘要:
The present disclosure provides a method for adjusting output of a lighting system. In one example, the method comprises providing to an integrated circuit a rectified sine waveform of a power source, providing to the integrated circuit a dimming signal corresponding to a dimming profile, modifying the rectified sine waveform into a truncated rectified sine waveform in accordance with the dimming signal, and selectively turning on or off a number of light emitting diodes in accordance with the truncated rectified sine waveform to produce a light output.
摘要:
The present disclosure provides a lighting system. In one example, the lighting system comprises a circuit board including plural light emitting sets, each of the light emitting sets including one or more light emitting diodes, plural integrated circuits configured to receive a rectified sine waveform of a power source, and a dimmer circuit electrically coupled to the integrated circuits and configured to transmit a dimming signal to the integrated circuits. Each one of the integrated circuits is electrically coupled to a respective one of the light emitting sets. Each of the integrated circuits is configured to modify the rectified sine waveform into a truncated rectified sine waveform based on the dimming signal. Each of the integrated circuits is configured to turn on or off a number of the light emitting diodes included in a respective one of the light emitting sets based on the truncated rectified sine waveform.