An array-type light-emitting device 212 includes multiple pixel circuits PIX electrically coupled in parallel and spatially arranged in a matrix. A power supply circuit 220 supplies electric power to the array-type light-emitting device 212. A DC/DC converter 224 has an output coupled to a power supply terminal of the array-type light-emitting device 212 via a power supply line. A power supply control circuit 225 sets a target value VCNT(REF) that corresponds to a light distribution pattern, and controls the DC/DC converter 224 such that the control target voltage VCNT approaches the target value VCNT(REF).
VEHICULAR LAMP SYSTEM, POWER SUPPLY CIRCUIT
FAHRZEUGLAMPENSYSTEM, STROMVERSORGUNGSSCHALTUNG
SYSTÈME DE LAMPE DE VÉHICULE, CIRCUIT D'ALIMENTATION ÉLECTRIQUE
2025-02-19
Patent
Electronic Resource
English
IPC: | H05B ELECTRIC HEATING , Elektrische Heizung / 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 |
VEHICULAR LAMP AND LIGHTING CONTROL CIRCUIT OF VEHICULAR LAMP
European Patent Office | 2019
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