PROBLEM TO BE SOLVED: To provide a lighting circuit capable of suppressing deterioration of a relay.SOLUTION: A driving circuit 414 supplies a driving current to a second light source 304. A dummy load circuit 450 is connected to a control line 434 to which a lighting control signal instructing on/off of the second light source 304 is input, and a dummy load current Ithat decreases as the temperature increases sinks.SELECTED DRAWING: Figure 2
【課題】リレーの劣化を抑制可能な点灯回路を提供する。【解決手段】駆動回路414は、第2光源304に駆動電流を供給する。ダミー負荷回路450は、第2光源304のオン、オフを指示する点灯制御信号が入力される制御ライン434に接続され、温度が高くなると減少するダミー負荷電流IDUMMYLOADをシンクする。【選択図】図2
LIGHTING CIRCUIT AND VEHICULAR LAMP
点灯回路および車両用灯具
2018-10-04
Patent
Electronic Resource
Japanese
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 |
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