RFID device with changeable characteristics
AssigneeAvery Dennison Corporation
InventorsIan J. Forster, Yukihiko Sasaki
Life of this patent
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Abstract
An RFID device includes a first, relatively permanent portion and a second alterable or inactivatable portion. Upon the occurrence of some predetermined event, the second portion and/or its coupling to the first portion is physically altered, inactivating it. The first portion may itself be an antennaless RFID device that may be read at short range, and the second portion may be an antenna that, when coupled to the first portion, substantially increases the range at which the first portion may be read. The second portion may be configured to be altered or inactivated by any of a variety of predetermined events, such as involving physical, chemical or electrical forces, performed either on the RFID device, or upon an object to which the RFID device is coupled.
Claims24
A method of altering read, transmit or detection characteristics of a radio frequency identification (RFID) device, said method comprising the steps of:
- obtaining an RFID device, the RFID device comprising a substrate, a transponder chip and an antenna coupled to the chip;
- and
- reducing a read, transmit or detection range of the RFID device via reducing an amount of the antenna that is coupled to the chip;
- wherein said step of reducing the amount of the antenna comprises altering a substantial portion of the substrate and/or the antenna;
- wherein the RFID device is initially operable within an original range;
- and
- wherein said step of reducing the read, transmit or detection range comprises leaving a remainder device sufficient for responding to a signal solely at a range shorter than the original range.
A radio frequency identification (RFID) device comprising:
- a substrate, a transponder chip and an antenna coupled to the chip;
- and
- an arrangement for reducing a read, transmit or detection range of the RFID device via reducing an amount of the antenna that is coupled to the chip;
- wherein said arrangement for reducing a read or detection range comprises an arrangement for altering a substantial portion of the substrate and/or the antenna;
- wherein said RFID device is initially operable within an original range;
- and
- wherein said arrangement for reducing the read, transmit or detection range is adapted to leave a remainder device sufficient for responding to a signal solely at a range shorter than the original range.
Dependencies are inferred from the claim text.