US 12,302,466 B1
Calibration procedure for a light-emitting diode light source
Jason E. Lewis, Driftwood, TX (US); Jivan J. Luu, Austin, TX (US); Alcides J. Dias, Bee Cave, TX (US); and Jacob Guerra, Austin, TX (US)
Assigned to Lutron Technology Company LLC, Coopersburg, PA (US)
Filed by Lutron Technology Company LLC, Coopersburg, PA (US)
Filed on Oct. 13, 2023, as Appl. No. 18/379,730.
Application 18/379,730 is a continuation of application No. 17/688,284, filed on Mar. 7, 2022, granted, now 11,818,819.
Application 17/688,284 is a continuation of application No. 16/446,869, filed on Jun. 20, 2019, granted, now 11,272,599, issued on Mar. 8, 2022.
Claims priority of provisional application 62/689,642, filed on Jun. 25, 2018.
Claims priority of provisional application 62/688,746, filed on Jun. 22, 2018.
This patent is subject to a terminal disclaimer.
Int. Cl. H05B 45/50 (2022.01); H05B 45/10 (2020.01); H05B 45/20 (2020.01); H05B 47/19 (2020.01); H05B 47/195 (2020.01)
CPC H05B 45/50 (2020.01) [H05B 45/10 (2020.01)] 18 Claims
OG exemplary drawing
 
1. A light-emitting diode (LED) lighting controller, comprising:
control circuitry to:
determine, for each of a plurality of LED emitters, a respective gain factor that includes:
a first gain factor that is a linear function of forward voltage across a photodetector; and
a second gain factor that is a non-linear function of the forward voltage across the photodetector;
adjust a drive current applied to each of the plurality of LED emitters using the determined gain factor for the respective LED emitter; and
update the second gain factor based on the change in luminous flux of the respective emitter over time.