A light-emitting element driving device includes a reset signal generation unit that generates a reset signal in accordance with current flowing in a light-emitting element, a set signal generation unit that generates a set signal in accordance with the anode voltage of the light-emitting element, and an output voltage supply unit that generates an output voltage from an input voltage in accordance with the reset signal and the set signal, so as to supply the output voltage to the light-emitting element. The set signal generation unit includes a current generation unit that generates current according to the anode voltage of the light-emitting element, a charging unit that charges the current generated by the current generation unit, and a comparator that generates the set signal in accordance with a comparison result between a charging voltage of the charging unit and a reference voltage.
Light-emitting element driving device, light-emitting device, and vehicle
2018-06-05
Patent
Electronic Resource
English
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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