| 摘要 |
PROBLEM TO BE SOLVED: To provide a floor indicator capable of preventing any dim lit state of an LED element attributable to the leakage current or the induced current generated when a semi-conductor switching element is OFF in the floor indicator for controlling ON/OFF of the LED element of a segment by the AC display driving power to be ON/OFF controlled by the semi-conductor switching element. SOLUTION: In the floor indicator, the AC display driving power to be ON/OFF controlled by a semi-conductor switching element is supplied to a diode bridge circuit 27 via resistors 30a, 30b for limiting the current, converted into the direct current. The direct current is supplied to one or a plurality of LED elements 26 arranged at the segment positions. A bypass resistor 29 for bypassing the induced current or the leakage current is connected in parallel to one or a plurality of LED elements in a plurality of LED driving circuits 31 for light-emitting the LED elements. COPYRIGHT: (C)2009,JPO&INPIT
|
