US 11,714,472 B2
Power over ethernet emergency lighting system and method of detecting power loss of a link segment thereof
David Crenshaw, Tucson, AZ (US)
Assigned to ABL IP Holdings, LLC, Atlanta, GA (US)
Filed by ABL IP Holdings, LLC, Atlanta, GA (US)
Filed on Jan. 22, 2021, as Appl. No. 17/156,343.
Application 17/156,343 is a continuation of application No. 16/516,896, filed on Jul. 19, 2019, granted, now 10,903,682.
Application 16/516,896 is a continuation of application No. 15/903,862, filed on Feb. 23, 2018, granted, now 10,361,583, issued on Jul. 23, 2019.
Application 15/903,862 is a continuation of application No. 15/432,381, filed on Feb. 14, 2017, granted, now 9,941,737, issued on Apr. 10, 2018.
Application 15/432,381 is a continuation of application No. 15/073,492, filed on Mar. 17, 2016, granted, now 9,609,706, issued on Mar. 28, 2017.
Claims priority of provisional application 62/135,006, filed on Mar. 18, 2015.
Prior Publication US 2022/0236781 A1, Jul. 28, 2022
Int. Cl. G06F 1/26 (2006.01); H05B 47/18 (2020.01); G06F 1/3206 (2019.01); H05B 45/00 (2022.01); H05B 45/3725 (2020.01); H05B 47/17 (2020.01)
CPC G06F 1/266 (2013.01) [G06F 1/3206 (2013.01); H05B 45/00 (2020.01); H05B 45/3725 (2020.01); H05B 47/17 (2020.01); H05B 47/18 (2020.01)] 15 Claims
OG exemplary drawing
 
1. A POE (“power over Ethernet”) emergency lighting system comprising:
a POE input configured to connect to a first POE port link segment, the POE input connected to a POE interface, which is operable to extract DC power from the first POE port link segment, wherein the POE interface is further operable to supply low level DC power to a battery charger, and wherein the POE interface is also operable to supply a relatively higher level of DC power to a normal lighting lamp driver;
a rechargeable battery configured to receive DC power from the battery charger and to supply DC power to a backup lamp driver;
a controller configured to detect a loss of normal operating power and to generate control signals in response to a detection of a loss of the normal operating power;
a switch having a switch output alternatively connected to the backup lamp driver and the normal lighting lamp driver in response to the control signals.