| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing at a low cost an annular lighting system using a light-emitting element which emits light under a certain condition as represented by an LED (light-emitting diode). <P>SOLUTION: A plurality of light-emitting element circuit boards of trapezoidal shape and one or more light-emitting element control circuit boards of trapezoidal shape are arranged continuously so that the upper base of the trapezoidal circuit boards may be inside and the lower base may be outside to form a doughnut shape polygonal, and the circuit boards are electrically connected using wiring and are connected to the outside power supply by wiring 12 and 13 to construct the annular lighting device. <P>COPYRIGHT: (C)2013,JPO&INPIT |
