Security tag with integrated EAS and energy harvesting magnetic element
First Claim
1. A security tag comprising:
- a rechargeable battery;
a magnetic element comprising a magnetic core and at least one coil winding disposed around at least a portion of the core, the magnetic element supplying a voltage corresponding to applied magnetic fields of a first frequency and a second frequency;
an EAS circuit having a resonant frequency corresponding to the first frequency; and
an energy harvesting circuit having a resonant frequency corresponding to the second frequency,the energy harvesting circuit converting the second frequency voltage to a battery voltage signal for the rechargeable battery.
5 Assignments
0 Petitions
Accused Products
Abstract
An EAS security tag for providing both EAS and battery recharging features within one tag. The tag includes a rechargeable battery and an antenna having a magnetic core and at least one coil winding disposed around at least a portion of the core. The antenna supplies a voltage corresponding to a first frequency or a second frequency when placed within a magnetic field. The tag also includes an EAS circuit having a resonant frequency corresponding to the first frequency, and an energy harvesting circuit having a resonant frequency corresponding to the second frequency, where the battery recharging circuit recharges the rechargeable battery. Depending upon the magnetic field that the tag is exposed to, either the EAS circuit is enabled thus allowing for EAS detection or the energy harvesting circuit is enabled allowing for the battery to be recharged.
-
Citations
20 Claims
-
1. A security tag comprising:
-
a rechargeable battery; a magnetic element comprising a magnetic core and at least one coil winding disposed around at least a portion of the core, the magnetic element supplying a voltage corresponding to applied magnetic fields of a first frequency and a second frequency; an EAS circuit having a resonant frequency corresponding to the first frequency; and an energy harvesting circuit having a resonant frequency corresponding to the second frequency, the energy harvesting circuit converting the second frequency voltage to a battery voltage signal for the rechargeable battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A security tag comprising:
-
a rechargeable battery; a magnetic element configured to supply a voltage corresponding to applied magnetic fields of a first frequency and a second frequency, the magnetic element comprising; a magnetic core; a first coil winding disposed around at least a portion of the magnetic core, the first winding corresponding to the first frequency; and a second coil winding disposed around at least a portion of the magnetic core, the second winding corresponding to the second frequency; an EAS circuit having a resonant frequency corresponding to the first frequency; and an energy harvesting circuit having a resonant frequency corresponding to the second frequency, the energy harvesting circuit converting the second frequency voltage to a battery voltage signal for the rechargeable battery. - View Dependent Claims (11, 12, 13, 14, 15, 16)
-
-
17. A method for integrating EAS and battery recharging capabilities within a security tag, the security tag including a magnetic element having a magnetic core and at least one coil winding disposed around at least a portion of the core, the magnetic element supplying a voltage corresponding to applied magnetic fields of a first frequency and a second frequency, the method comprising:
-
enabling the EAS mode when the magnetic element is placed within a magnetic field corresponding to a first frequency; and enabling the energy harvesting mode when the magnetic element is placed within a magnetic field corresponding to a second frequency. - View Dependent Claims (18, 19, 20)
-
Specification