Luminaire dimming module uses 3 contact NEMA photocontrol socket
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United States of America Patent
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Mar 20, 2018
Issued Date -
N/A
app pub date -
Apr 25, 2017
filing date -
Apr 26, 2016
priority date (Note) -
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Abstract
An article and circuit that controllably dims a luminaire, for example without controlling a line power of the luminaire. The luminaire includes a traditional three-contact socket to receive a photocontroller, such as that used for street lights. The article uses a desired dimming control signal to provide an output control signal that controls whether the light source in the luminaire is turned ON or turned OFF to thereby effect the desired amount of dimming. The output control signal may be a pulse width modulated (PWM) signal with a duty cycle that is related to the desired level of illumination or dimming. The system may use a dimming signal from a five or seven contact dimming photocontroller to provide such an output control signal to control the light-level for the luminaire.
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