| 摘要 |
PROBLEM TO BE SOLVED: To provide a light-emitting device capable of preventing only a light-emitting element of specific color from emitting light, when the power supply voltage varies, at a low cost.SOLUTION: A light-emitting device 10 includes light source blocks 12-14 constituted of series connections of two LEDs 12a, 13a, 14a having different working voltage, an on-vehicle battery 11 supplying a drive current for emitting light from the LEDs 12a, 13a, 14a by applying a drive voltage of the same voltage value to each light source block 12-14, and a power supply interruption circuit 16 for bringing all LEDs 12a, 13a, 14a into emission impossible state by entirely interrupting drive current supply from the on-vehicle battery 11 to each light source block 12-14, when the battery voltage (power supply voltage Vbat) of the on-vehicle battery 11 is less than a set voltage. |
