| 摘要 |
A rotation-activated electronic component, preferably a RFID tag (210) mounted on or incorporated in a support (200) that is rotated when read, e.g. a CD or DVD. The RFID tag (210) comprises an antenna (212), a rotational switch (214), a component (216), advantageously a processor, and a time usage limiter (218). The antenna (112) is adapted to transform received RFID signals to electric energy that powers the component (216) and the rotational switch (214) is adapted to cut the circuit unless the support (200) does not rotate at or above a certain rotational speed (470). The time usage limiter (218) counts down a timer when it is powered via the rotational switch (214) and disables the RFID tag (210) when the timer expires. Supports equipped with the RFID tag of the invention will thus respond until the timer expires, and preferably only if they rotate sufficiently..
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