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Emergency lighting system

  • US 10,306,735 B2
  • Filed: 04/14/2017
  • Issued: 05/28/2019
  • Est. Priority Date: 04/19/2016
  • Status: Active Grant
First Claim
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1. An emergency lighting system comprising:

  • an input configured to receive a line voltage;

    a charging circuit configured to receive the line voltage and output a charging voltage;

    an auxiliary power supply configured to receive the charging voltage;

    a plurality of lights including a first group of lights and a second group of lights;

    a driver configured to provide power;

    a switching circuit includinga driver input configured to receive power from the driver,an auxiliary power input configured to receive power from the auxiliary power supply,an emergency control input, anda relay configured, the relay having a first position, in which power from the driver is provided to the first group of lights and the second group of lights, and a second position, in which power from the auxiliary power supply is provided to the second group of lights;

    a controller configured tomonitor the line voltage,compare the line voltage to a threshold, andoutput a signal to the emergency control input when the input voltage is below the threshold;

    wherein, the switching circuit places the relay in the second position upon receiving the signal at the emergency control input.

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