| 摘要 |
A lighting system is provided with a semiconductor light emitting device using a semiconductor light emitting element. The system stably synthesizes output light, suppresses separation of light, varies color tone and simplifies control for driving the light emitting device as much as possible. The lighting system has a light emitting part where a plurality of types of semiconductor light emitting devices different in luminescent colors, which have the semiconductor light emitting elements and fluorescent substances and emit light to an external part by light emission from the semiconductor light emitting elements, and that from the fluorescent substances which are excited and which fluoresce by emitted light from the semiconductor light emitting element or light emission from the fluorescent substances which are excited and fluoresce by emitted light from the semiconductor light emitting element, are integrated and arranged. In the luminescent colors of the semiconductor light emitting devices, a deviation duv from a black body radiation track is settled in a range of-0.02<duv<0.02 in a uv chromaticity diagram of USC color system. Output light beams from the light emitting part where a plurality of types of the semiconductor light emitting devices are integrated and arranged are mixed and are emitted outside. |
