	US 12,022,582 B2
	Load control device for a light-emitting diode light source
Robert D. Stevens, Jr., Emmaus, PA (US); and Matthew R. Zartman, Bethlehem, PA (US)
Assigned to Lutron Technology Company LLC, Coopersburg, PA (US)
Filed by Lutron Technology Company LLC, Coopersburg, PA (US)
Filed on Apr. 6, 2023, as Appl. No. 18/296,407.
Application 18/296,407 is a continuation of application No. 17/394,073, filed on Aug. 4, 2021, granted, now 11,653,427.
Application 17/394,073 is a continuation of application No. 16/808,098, filed on Mar. 3, 2020, granted, now 11,109,456, issued on Aug. 31, 2021.
Application 16/808,098 is a continuation of application No. 16/446,601, filed on Jun. 19, 2019, granted, now 10,609,777, issued on Mar. 31, 2020.
Application 16/446,601 is a continuation of application No. 16/127,163, filed on Sep. 10, 2018, granted, now 10,356,868, issued on Jul. 16, 2019.
Application 16/127,163 is a continuation of application No. 15/583,425, filed on May 1, 2017, granted, now 10,104,735, issued on Oct. 16, 2018.
Application 15/583,425 is a continuation of application No. 15/186,254, filed on Jun. 17, 2016, granted, now 9,655,180, issued on May 16, 2017.
Claims priority of provisional application 62/182,110, filed on Jun. 19, 2015.
Prior Publication US 2023/0247738 A1, Aug. 3, 2023
Int. Cl. H05B 45/10 (2020.01); H05B 45/14 (2020.01); H05B 45/327 (2020.01); H05B 45/3725 (2020.01); H05B 45/375 (2020.01); H05B 45/38 (2020.01); H05B 45/39 (2020.01); H05B 45/395 (2020.01); H05B 47/16 (2020.01); H05B 47/19 (2020.01)

CPC H05B 45/10 (2020.01) [H05B 45/14 (2020.01); H05B 45/327 (2020.01); H05B 45/3725 (2020.01); H05B 45/375 (2020.01); H05B 45/38 (2020.01); H05B 45/39 (2020.01); H05B 45/395 (2020.01); H05B 47/16 (2020.01); H05B 47/19 (2020.01)]

12 Claims

1. An electrical load controller to control the intensity of an LED lighting load, the controller comprising: control circuitry to: receive a target intensity (Ltrgt): cause a load regulation circuit to adjust a load current supplied to the LED lighting load; wherein the LED lighting load includes an emitter having: an intensity range from a high end intensity (Lhe) to a low end intensity (Lle); and a minimum load current (Lmin) that corresponds to a threshold intensity; determine whether the received target intensity is greater than or less than the threshold intensity to selectively cause the load regulation circuit to reversibly transition between a NORMAL operating mode and a BURST operating mode based on the received target intensity: responsive to the determination that the received target intensity is greater than the threshold intensity, cause the load regulation circuitry to operate in the NORMAL mode, in which the control circuitry to: cause the load regulation circuitry to hold a duty cycle of the load regulation circuitry constant; and cause the load regulation circuitry to adjust the load current provided to the LED between the minimum load current and a maximum load current; and responsive to the determination that the received target intensity is less than the threshold intensity, cause the load regulation circuitry to operate in the BURST mode, in which the control circuitry to cause the load regulation circuitry to hold the load current at the constant; and cause the load regulation circuitry to adjust the duty cycle of the load circulation circuitry between a minimum duty cycle and a maximum duty cycle.