Self-detachable RFID tags
First Claim
1. A method for operating a Radio Frequency Identification (“
- RFID”
) tag, comprising;
selectively breaking an electrical connection between a capacitor and a detaching unit disposed within the RFID tag;
inducing current through a magnetic loop or solenoid disposed within the RFID tag that is caused by an inductive field, a magnetic field or a Radio Frequency (“
RF”
) field being generated within a surrounding environment;
using the current which is induced through the magnetic loop or solenoid to charge the capacitor disposed within the RFID tag;
receiving a detaching signal at the RFID tag that is to cause activation of the detaching unit;
selectively re-establishing the electrical connection between the capacitor and the detaching unit in response to the detaching signal; and
activating the detaching unit by supplying current from the capacitor to the detaching unit, whereby the RFID tag can be detached from an article.
3 Assignments
0 Petitions
Accused Products
Abstract
Systems and methods for operating an RFID tag. The methods comprise: inducing current through a magnetic loop or solenoid disposed within the RFID tag that is caused by a inductive field, a magnetic field or an RF field being generated within a surrounding environment; using the current which is induced through the magnetic loop or solenoid to charge a capacitor disposed within the RFID tag; decreasing the amount of current induced through the magnetic loop or solenoid; receiving a detaching signal at the RFID tag; electrically connecting the capacitor to a detaching unit disposed within the RFID tag in response to the detaching signal; and activating the detaching unit by supplying current from the capacitor to the detaching unit, whereby the RFID tag can be detached from an article.
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Citations
18 Claims
-
1. A method for operating a Radio Frequency Identification (“
- RFID”
) tag, comprising;selectively breaking an electrical connection between a capacitor and a detaching unit disposed within the RFID tag; inducing current through a magnetic loop or solenoid disposed within the RFID tag that is caused by an inductive field, a magnetic field or a Radio Frequency (“
RF”
) field being generated within a surrounding environment;using the current which is induced through the magnetic loop or solenoid to charge the capacitor disposed within the RFID tag; receiving a detaching signal at the RFID tag that is to cause activation of the detaching unit; selectively re-establishing the electrical connection between the capacitor and the detaching unit in response to the detaching signal; and activating the detaching unit by supplying current from the capacitor to the detaching unit, whereby the RFID tag can be detached from an article. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- RFID”
-
10. A Radio Frequency Identification (“
- RFID”
) tag, comprising;a switch; a detaching unit; a magnetic loop or solenoid through which a current is induced when the RFID tag is within a inductive field, a magnetic field or a Radio Frequency (“
RF”
) field being generated within a surrounding environment;an internal capacitor that is charged by the current which is induced through the magnetic loop or solenoid; an antenna configured to receive a detaching signal that is to cause activation of the detaching unit disposed within the RFID tag; and an electrical connection between the internal capacitor and the detaching unit that is (a) selectively broken at a first time and (b) selectively re-established at a second subsequent time in response to the detaching signal; wherein the detaching unit is activated when current is supplied thereto from the internal capacitor so that the RFID tag can be detached from an article. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
- RFID”
Specification