| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an RFID tag device utilizing phisical property, which is easily mounted, can be controlled by a user, and can validate a privacy protection function if necessary. <P>SOLUTION: The RFID tag device comprises an RFID tag composed of an antenna and a chip, and a shielding part which has functions of switching between a first state in which it blocks RF signals to or from the RFID tag and a second state in which it does not block the RF signals to or from the RFID tag, the shielding part is comprised of a metal sheet or a metal film which covers at least the antenna while in the first state and does not cover the antenna while in the second state. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
