| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a card and an IC card in which visible or invisible display is possible by a low-cost, simple device constitution, and which is suitable for judgement of truth or falsehood. <P>SOLUTION: The card applies an electric field to a space between confronted electrodes, mounts a plurality of display devices performing image display in accordance with the reversible change of a substance between the electrodes, connects antennas with the respective display devices, feeds electric power by electromagnetic induction or electromagnetic coupling in a non-contacted state, and displays latent image visible or invisible in accordance with whether there is the application of an electric field or not. <P>COPYRIGHT: (C)2009,JPO&INPIT |
