Patent ID: 11877360
Assignee: RADIANT RESEARCH LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 13:
14. A method of dimming lighting output, the method comprising:
providing an output power signal for powering one or more light emitting devices;
measuring characteristic parameters of the output power signal, the characteristic parameters comprising at least one of: current, voltage and power;
when the characteristic parameter of the output power signal is above a threshold, varying the output power signal in a closed control loop, based on feedback from one or more feedback sensors; and
when the characteristic parameter of the output power signal is below the threshold, (i) varying the output power signal in an open control loop and (ii) the output power signal is a pulsed signal having a plurality of pulses and is alternated between one or more periods in an on state and one or more periods in an off state, wherein (a) at least one of the one or more periods in the on state including a plurality of pulses of the pulsed signal, and (b) at least some of the one or more periods in the off state having a duration corresponding to a plurality of pulses of the pulsed signal.