Systems and methods for radio frequency identification enabled deactivation of acousto-magnetic ferrite based marker
AssigneeSensormatic Electronics Corporation
InventorsAdam S. Bergman, Manuel Soto, Ronald B. Easter
Life of this patent
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Abstract
Systems and methods for operating a marker. The method comprising: receiving, by a Radio Frequency Identification (“RFID”) element of the marker, an RFID deactivation signal transmitted from an external device; and responsive to the RFID deactivation signal, supplying power from the RFID element to a detuner element so that the detuner element switches from a first state to a second state. The marker's resonant frequency is changed to a first value that falls outside of an Electronic Article Surveillance (“EAS”) systems operating frequency range when the detuner element switches from the first state to the second state.
Claims20
A method for operating a security tag, comprising:
- tuning a resonant circuit of the security tag to produce a resonant signal with a first frequency that is detectable by a security system, wherein the resonant circuit comprises an LC circuit having an inductor connected to a capacitor;
- receiving a deactivation signal by a wireless communication element of the security tag that is separate and distinct from the resonant circuit;
- and
- in response to the deactivation signal, detuning the resonant circuit by supplying power from a Radio Frequency Identification (RFID) element to a detuner element of the security tag whereby the detuner element switches states and causes a resonant frequency of the resonant circuit to be altered such that the resonant frequency differs from an operating frequency of the security system,
- wherein the detuner element is electrically connected in series between the inductor and the capacitor of the LC circuit, and the RFID element is positioned between the wireless communication element and the detuner element.
A security tag, comprising:
- a resonant circuit that is tuned to produce a resonant signal with a first frequency which is detectable by a security system, wherein the resonant circuit comprises an LC circuit having an inductor connected to a capacitor;
- a wireless communication element that is separate and distinct from the resonant circuit, and that is configured to receive a deactivation signal;
- a detuner element electrically connected in series between the inductor and the capacitor of the LC circuit, and that is configured to cause a detuning of the resonant circuit when power is supplied to the detuner element;
- and
- a Radio Frequency Identification (RFID) element that is positioned between the wireless communication element and the detuner element, and configured to supply the power to the detuner element in response to the deactivation signal,
- wherein during the detuning, the detuner element switches states and causes a resonant frequency of the resonant circuit to be altered such that the resonant frequency differs from an operating frequency of the security system.
Dependencies are inferred from the claim text.