| 摘要 |
This lighting device has: a light emitting element group HSB, which is provided with a light emitting element group HS2 that emits light in the cases where the voltage of a light emission reference voltage VH2 is applied, and a light emitting element group HS12 that emits light in the cases where a light emission reference voltage VH12, which is higher than the light emission reference voltage VH2, is applied, said light emitting element group HSB emitting light in the cases where a voltage equal to or higher than a light emission reference voltage VHa is applied; a semiconductor chip IC1 that is provided with a light emission control unit HC1, which performs a light emission control so as to have a light emitting element group HS emit light in the cases where a drive voltage Vk is higher than the light emission reference voltage VHa, and so as to have the light emitting element group HS stop the light emission in the cases where the drive voltage is lower than the light emission reference voltage VHa; and a semiconductor chip IC2 that is provided with a light emission control unit HC2, which performs a light emission control so as to have a light emitting element group HSa emit light in the cases where the drive voltage Vk is higher than the light emission reference voltage VHa, and which performs a light emission stop control so as to stop the light emission in the cases where the drive voltage is smaller than the light emission reference voltage VHa. |
