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

Claim 0:
1. A control system arranged to provide dimming control of light output of one or more light emitting device, the control system comprising:
a switch mode regulator arranged to provide an output power signal to the one or more light emitting device, and to vary the output power signal;
one or more feedback sensors arranged to measure characteristic parameters of the output power signal, the characteristic parameters comprising at least one of: current, voltage and power; and
a controller arranged to:
when a characteristic parameter of the output power signal is above a threshold, vary the output power signal in a closed control loop, based on feedback from the one or more feedback sensors; and
when the characteristic parameter of the output power signal is below the threshold, (i) vary 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 some 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.