A lighting circuit includes a control unit that selects one of an extinguishing mode and a plurality of lighting modes based on a first control signal and a second control signal, and a drive unit. The control unit is configured to i) select the extinguishing mode when at least one of the first control signal and the second control signal is a non-pulse signal, and ii) select one of the plurality of lighting modes based on the combination of the duty ratio of the first control signal and the duty ratio of the second control signal, when both the first control signal and the second control signal are pulse signals.
Lighting circuit and vehicle lighting device
2018-09-11
Patent
Elektronische Ressource
Englisch
IPC: | B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein / F21S Ortsfeste Leuchten , NON-PORTABLE LIGHTING DEVICES / H05B ELECTRIC HEATING , Elektrische Heizung |