NORMAL/EMERGENCY LIGHTING CIRCUIT, NORMAL/EMERGENCY LIGHTING SYSTEM AND DISASTER PREVENTION LIGHTING SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a normal/emergency lighting circuit which can be formed in a simple structure and miniaturized at a lower cost. ;SOLUTION: An AC-DC shared power input 11 is provided, to which AC voltage is input in normal operation and DC voltage is input in emergency, and input power passages after the power input 11 are combined in one system for an input judgment part 12 to judge the AC or DC type of voltage input the power input 11 so that a lighting part 14 can be controlled by a lighting control part 18 in accordance with the judgment result to vary an output level to a load 13 between normal operation and emergency. In this way, a power supply before the power input 11 can be separately designed as a power separate type and a lighting circuit unit can be advantageously formed in a more simple structure than the input power passages are formed in two systems.;COPYRIGHT: (C)1998,JPO