| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a light emission pattern control based on a tertiary winding in a current transformer capable of safely and surely controlling a light emission pattern of load lighting by opening/closing a switch in a lighting power feeding system feeding a high-frequency constant current to an EL panel or a neon lamp via the current transformer. SOLUTION: Primary windings in a plurality of current transformers are connected in series, and the high-frequency constant current is fed to the primary windings. In each of a plurality of current transformers, a secondary winding and the tertiary winding with the number of turns greatly smaller than that of the secondary winding are wound, and the EL panel or the neon lamp is connected to each of the secondary windings, while a short-circuiting switch is connected to each of the tertiary windings. When a plurality of short- circuiting switches are selectively opened/closed, the EL panels or the neon lamps are selectively turned on/off.</p> |
