| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide luminescent tread stairs with a tread tip part easily recognizable by making it visible for a fixed time even when power is not supplied to an LED due to power interruption caused by an earthquake, a fire, or the like or when the LED itself breaks down. <P>SOLUTION: A luminescent part 2 using the LED as a primary light emission source and visible from the outside is provided at the upper face tip part of a tread, and the luminescent part 2 is provided with a luminous material 21 which stores light emission energy of the LED and functions as a secondary light emission source. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
