Dimming control for emergency lighting systems

摘要

An emergency lighting module for providing emergency power to a solid state luminaire includes a microcontroller, and a detector coupled to the microcontroller and configured to detect a status signal indicative of a status of an AC line voltage, the emergency lighting module is configured to output a dimming control signal to the solid state luminaire in response to a reduction of the AC line voltage. The microcontroller is further configured to output a select signal to the solid state luminaire to cause the solid state luminaire to dim in accordance with the dimming control signal when the dimming control signal is output.

主权项

1. An emergency lighting module for providing emergency power to a solid state luminaire, the emergency lighting module comprising:
a microcontroller; and a detector coupled to the microcontroller and configured to detect a status signal indicative of a status of an AC line voltage, wherein the microcontroller is configured to output a first dimming control signal to the solid state luminaire in response to the status signal, wherein the first dimming control signal is configured to control operation of a dimming controller in the solid state luminaire, and wherein the microcontroller is further configured to output a select signal to the solid state luminaire to enable the luminaire to select from between the first dimming control signal and a second dimming control signal that is input to the solid state luminaire and to cause the solid state luminaire to dim a light emitting diode (LED) of the solid state luminaire in accordance with the first dimming control signal when the first dimming control signal is selected.