| 摘要 |
PROBLEM TO BE SOLVED: To provide a lighting system, in an easy manner, wherein a plurality of illuminants are arranged in a truncated cone recessed surface, by implanting the illuminants in an annular ring-shaped bendable board having a notch with the board being held in a planar state, and by joining notch sides of the board with each other such that the illuminants are positioned on the recessed surface side. SOLUTION: With an annular ring-shaped bendable printed circuit board 2 having a notch being held in a planar state, illuminants 1 are implanted in the board 2 by the method of soldering or the like. After that, when one cut-out side 2a of the board 2 and the other cut-out side 2b thereof are simply joined with or held close to each other, the printed circuit board 2 is necessarily formed into a truncated circular cone shape, and the illuminants 1 are arranged on the truncated circular cone recessed surface 2c. At this point, a power supply cable is also wired on the board 2 by the method of soldering or the like. A lighting system is completed by attaching the thus formed board 2 and illuminants 1 to a lighting case with a holding frame. |
