×

LED-BASED EMERGENCY LIGHTING EQUIPMENT AND METHODOLOGY

  • US 20170250569A1
  • Filed: 05/17/2017
  • Published: 08/31/2017
  • Est. Priority Date: 08/29/2011
  • Status: Active Grant
First Claim
Patent Images

1. An emergency lighting system comprising:

  • an AC-DC switch mode power converter;

    a brown-out detection circuit for detecting a change in AC voltage and determining a brown-out state by reference to preset threshold values;

    a rechargeable battery;

    a charger circuit for charging said battery and operatively coupled to said AC-DC switch mode power converter;

    at least one LED lighting source powered by said battery upon determination of said brown-out state; and

    a microprocessor powered by said battery and executing a pulse charging algorithm to selectively change said battery power consumption levels and control said charger circuit for selectively charging said battery.

View all claims
  • 6 Assignments
Timeline View
Assignment View
    ×
    ×