US Patent No. 10,143,047

LIGHTING CONTROL SYSTEM AND METHOD FOR GENERATING SUPPLY CURRENTS FOR LED CHANNELS


Patent No. 10,143,047
Issue Date November 27, 2018
Title Lighting Control System And Method For Generating Supply Currents For Led Channels
Inventorship David Gamperl, Hartberg (AT)
Manfred Pauritsch, Graz (AT)
Herbert Truppe, Graz (AT)
Assignee Dialog Semiconductor (UK) Limited, London (GB)

Claim of US Patent No. 10,143,047

1. A lighting control system for generating supply currents for a first LED channel and at least a second LED channel, the system comprisinga first controlled current source for generating a first supply current for the first LED channel based on a first control signal;
a second controlled current source for generating a second supply current for the second LED channel based on a second control signal;
a first signal combiner for generating the first control signal based on a synchronization signal that comprises periodic starting pulses and on a combination of a first magnitude dimming signal and a first pulse dimming signal; and
a second signal combiner for generating the second control signal based on the synchronization signal and on a combination of a second magnitude dimming signal and a second pulse dimming signal; wherein
the first and the second signal combiner are designed such that changes of the respective first and second control signals come into effect only with a respective time offset with respect to one of the starting pulses of the synchronization signal.