| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-performance lighting system capable of varying an irradiation angle of illumination without mechanically moving a fixture or an optical system, and arbitrarily varying light distribution to achieve a function as a pattern drawing or mirror ball by miniaturization or weight reduction thereof. SOLUTION: An LED is disposed on an inner face of a dome D, and this is installed on a ceiling back or the like. Light emitted from the LED is irradiated toward a floor face F from a small hole drilled on a ceiling face C. The LEDs concentrically disposed are connected to each other, a small irradiation angle such as A can be obtained by lighting only the LED disposed inside of a concentric circle, and a wide irradiation angle such as B can be obtained by lighting it at art outer circumference part simultaneously. Additionally, a pattern drawing or mirror ball are provided by LED lighting control. |
