A driving circuit 610 receives an input voltage VIN, and supplies a driving current ILED to a semiconductor light source 502. A plurality of m (m ≥ 2) bypass switches SW1 through SW3 are coupled in parallel with multiple light-emitting elements 504_1 through 504_3, respectively. A bypass control unit 650 generates m-phase gate pulse signals Sg1 through Sg3 having a duty cycle that corresponds to the input voltage VIN and phases shifted in increments of 360°/m, and controls the m bypass switches SW1 through SW3 according to the m-phase gate pulse signals.
LIGHTING CIRCUIT AND VEHICULAR LAMP
BELEUCHTUNGSSCHALTUNG UND FAHRZEUGLEUCHTE
CIRCUIT D'ÉCLAIRAGE ET LAMPE DE VÉHICULE
2021-09-22
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 / H05B ELECTRIC HEATING , Elektrische Heizung |
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