Foldable data carrier e.g. chip card, for use in super market, has antenna coil, whose receiving and transmission sensitivity is reduced in folded form condition, where wireless transmission of data is blocked in form condition of device

摘要

The carrier (1) has an antenna coil (5), whose receiving and transmission sensitivity is reduced in a folded form condition, where wireless transmission of data is blocked in a form condition of the device. An energy receiving antenna is provided for operating the device. An inner section is movable against the covering section. A light sensor blocks the wireless transmission of data below a limited value for illumination detected by the light sensor.