| 摘要 |
<p>An information display device (1) includes an electronic paper (2) and an authentication device (3) for authenticating the electronic paper (2). More than one electronic paper (2) or more than one authentication device (3) are provided. The information display device (1) includes a plurality of position detection means (position detection means (21 (31))), judgment process means (23 (33)), and information display means (22 (32)). When the electronic paper (2) and the authentication device (3) are superimposed on other electronic paper (2) or the authentication device (3), the position detection means (21 (31)) detects a relative position of the electronic paper (2) and the authentication device (3) with respect to the other electronic paper (2) or the authentication device (3). The judgment process means (23 (33)) judges whether the detected relative position satisfies a predetermined positional relationship and transmits a control signal to the electronic paper (2) or the authentication device (3) according to the judgment result. According to the control signal, the information display means (22 (23)) displays character information on the electronic paper (2) or the authentication device (3).</p> |
