| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To keep lighting up the inside of a car without requiring a special illumination lamp such as an auxiliary lamp other than a power failure lamp even after the predetermined time specified in the law has elapsed from the power failure. <P>SOLUTION: The power failure lamp 4 arranged in the car of the elevator and lit by the electric power of a battery power source 2 in power failure is constituted by a plurality of LEDs, and the battery power source 2 has a voltage capable of lightening all of the five LEDs for 30 minutes or more with the prescribed illuminance. The power failure lamp device includes a power failure detecting means 3a for detecting the power failure state wherein power source supply to the elevator is stopped, a battery power source voltage detecting means 3b for detecting the voltage of the battery power source 2 in accordance with detection of power failure by the power failure detecting means 3a, and an LED lighting control means 3c for controlling lighting of the power failure lamp 4 so as to gradually reduce the number of lightening LEDs in accordance with lowering of the voltage of the battery power source 2 detected by the battery power source voltage detecting means 3b. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
