The array-type light emitting device (212) includes a plurality of pixel circuits (PIX) electrically connected in parallel and spatially arranged in an array. The power supply circuit (220) supplies power to the array-type light emitting device (212). The DC/DC converter (224) is connected as an output to a power supply terminal of the array-type light emitting device (212) via a power supply line. The power supply control circuit (225) sets a target value (VCNT (REF)) in accordance with the light distribution pattern, and controls the DC/DC converter (224) such that the control target voltage (VCNT) approaches the target value (VCNT (REF)).
阵列型发光器件(212)包括电气地并联连接、在空间上呈阵列状配置的多个像素电路(PIX)。电源电路(220)向阵列型发光器件(212)供给电力。DC/DC转换器(224)为输出经由电源线连接至阵列型发光器件(212)的电源端子。电源控制电路(225)根据配光图案设定目标值(VCNT(REF)),以控制对象电压(VCNT)接近目标值(VCNT(REF))的方式,控制DC/DC转换器(224)。
VEHICLE LAMP SYSTEM AND POWER SUPPLY CIRCUIT
车辆用灯具系统、电源电路
2023-02-03
Patent
Electronic Resource
Chinese
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 |
Vehicle-mounted lamp power supply circuit and power supply method
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