US Patent 9924582 Luminaire dimming module uses 3 contact NEMA photocontrol socket
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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.
US Patent 09924582 Luminaire dimming module uses 3 contact NEMA photocontrol socket US Patent 9924582 Luminaire dimming module uses 3 contact NEMA photocontrol socket
US Patent 09924582 Luminaire dimming module uses 3 contact NEMA photocontrol socket
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