| 摘要 |
The invention concerns a display peripheral device for contact-free portable object such as a smart card (10) for displaying data concerning the use of said portable object. Said peripheral device comprises a chip, display means (16) and power and data receiving means (18), not connected by ohmic contact to the portable object. Said reception means is a planar winding serving as secondary of a transformer whereof the primary consists of an antenna (14) of the portable object, when the latter receives power and data, coming from a reader of the portable object, by electromagnetic coupling.
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