The present invention provides a more versatile technique for detecting the failure of a plurality of lamps or a plurality of light sources mounted in a vehicle and connected in series. Each of a lowbeam lamp 11 and a high beam lamp 12 connected in series includes at least one light source. A lamp driving circuit 131 is configured to supply current to each of the low and high beam lamps 11, 12. Afirst voltage detecting circuit 141 is configured to detect a first voltage V1 that is a sum of voltages applied to each of the low beam lamp and the high beam lamp. A second voltage detecting circuit 142 is configured to detect a second voltage V2 that is applied to the high beam lamp. A processor 133 is configured to obtain a difference VD between the first voltage V1 and the second voltage V2,and to detect a failure in the low beam lamp based on comparison between the difference VD and a rewritable normal operation voltage NVL of the low beam lamp 11.
本发明提供一种用于检测被搭载于车辆并串联连接的多个灯或多个光源的故障的、通用性更高的技术。近光灯(11)和远光灯(12)各自包含至少一个光源,并被串联连接。灯驱动电路(131)向近光灯(11)和远光灯(12)的每一个供给电流。第一电压检测电路(141)检测第一电压(V1),该第一电压(V1)为被施加于近光灯(11)和远光灯(12)的每一个的电压的合计。第二电压检测电路(142)检测与被施加于远光灯(12)的电压对应的第二电压(V2)。处理器(133)取得第一电压(V1)与第二电压(V2)的差分值(VD),基于差分值(VD)与能够重写的近光灯(11)的正常动作电压(NVL)的比较结果来检测近光灯(11)的故障。
Lamp failure detecting device, method for setting lamp failure detecting device, light source failure detecting device, method for setting light source failure detecting device, and lamp assembly
灯故障检测装置及其设定方法、光源故障检测装置及其设定方法、及灯组件
2020-06-05
Patent
Electronic Resource
Chinese
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