| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a display sign etc., visible even in the absence of light. <P>SOLUTION: The light accumulative reflection sheet is formed by laminating and fixing a second sheet 3 having a retroreflection function on a first sheet 2 formed by being mixed with a light accumulative material and an inorganic fluorescent material. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
