| 摘要 |
The lighting apparatus comprises first, second and third light-emitting diodes (D1, D2, D3, fig 1). These light-emitting diodes emit different coloured light R, G, B. A triggering unit (15, 16, 17, fig 1) is provided such that the three light-emitting diodes each emit light simultaneously in normal operation. A checking unit S1, 22, 23, 21, 24 is provided for operating the light-emitting diodes in a checking mode. In this mode, a current is impressed into one of the light-emitting diodes D3 so that it emits light. Meanwhile the checking unit also uses S1 to connect at least one of the other three light-emitting diodes is in such a way that the voltage generated in the unlit LED by the illumination of the other light-emitting diode is measured. The lighting apparatus may be used for illuminating the interior of a vehicle. |
