No.2（2007）8.A design and trial production of a self-lighting type refuge guidance sign

Takeshi Kobayashi, Mihoko Igarashi, Ryouichi Miyajima

A refuge guidance sign guides disaster victims at the time of the disaster, and wherever they may be they can necessarily take refuge quickly and exactly by seeing the sign.

However, many of the present refuge guidance signs do not emit light, there are many that emit light with an external power supply, and when the power supply is interrupted by disaster at night, they cannot function as a refuge guidance sign. Furthermore, although there is also a system using EL, there is a problem with the brightness of the EL, its lifetime, etc. Then, an experimental refuge guidance sign was made using LEDs, it had an independent power supply by solar cells and further with a battery. An experimental system which can emit light was designed which had a power supply which became independent even if it faced an earthquake at night. In addition, "LED lighting circuit for AC" (patent 3122870) is used for the LED panel. Hereafter, the contents are reported.

Keywords

refuge guidance sign, LED

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