US 11,953,167 B2
Devices and systems having AC LED circuits and methods of driving the same
Michael Miskin, Sleepy Hollow, IL (US)
Assigned to Lynk Labs, Inc., Elgin, IL (US)
Filed by Lynk Labs, Inc., Elgin, IL (US)
Filed on Apr. 8, 2019, as Appl. No. 16/378,314.
Application 16/378,314 is a continuation of application No. 15/632,906, filed on Jun. 26, 2017, granted, now 10,257,892.
Application 15/632,906 is a continuation of application No. 14/886,252, filed on Oct. 19, 2015, granted, now 9,693,405, issued on Jun. 27, 2017.
Application 14/886,252 is a continuation of application No. 14/239,504, abandoned, previously published as PCT/US2012/051531, filed on Aug. 20, 2012.
Claims priority of provisional application 61/575,273, filed on Aug. 18, 2011.
Prior Publication US 2019/0306943 A1, Oct. 3, 2019
Int. Cl. F21S 41/141 (2018.01); H05B 45/14 (2020.01); H05B 45/30 (2020.01); H05B 45/42 (2020.01); H05B 45/46 (2020.01); H05B 45/48 (2020.01); H05B 45/50 (2022.01); H05B 45/58 (2020.01); F21S 41/19 (2018.01); F21S 43/14 (2018.01); F21S 45/48 (2018.01); F21Y 115/10 (2016.01); H05B 45/59 (2022.01)
CPC F21S 41/141 (2018.01) [H05B 45/14 (2020.01); H05B 45/30 (2020.01); H05B 45/42 (2020.01); H05B 45/46 (2020.01); H05B 45/48 (2020.01); H05B 45/50 (2020.01); H05B 45/58 (2020.01); F21S 41/192 (2018.01); F21S 43/14 (2018.01); F21S 45/48 (2018.01); F21Y 2115/10 (2016.08); H05B 45/59 (2022.01)] 20 Claims
OG exemplary drawing
 
1. A lighting system comprising:
a driver integrated circuit,
wherein the driver integrated circuit has a load sensor, and
wherein the driver integrated circuit provides a DC output;
at least one LED circuit having at least two LEDs,
wherein the at least one LED circuit is electrically configured so that a first LED in the at least one LED circuit is electrically connected to and forward biased by the driver integrated circuit and a second LED in the at least one LED circuit is electrically connected to and reverse biased by the driver integrated circuit, and
wherein the load sensor is configured to detect when the first LED fails to provide a voltage output while being forward biased by the driver integrated circuit; and
a switching circuit capable of switching the DC output of the driver integrated circuit to forward bias the second LED in the at least one LED circuit,
wherein the driver integrated circuit is configured to cause the switching circuit, without intervention from a user, to switch the DC output to forward bias the second LED and reverse bias the first LED after the load sensor detects the first LED is not operating.