Security tag with integrated EAS and energy harvesting magnetic element
US8648721B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2010 |
| Grant date | Feb 11, 2014 |
| Priority date | — |
| Expiry date | Dec 12, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/2431
- WIPO fieldControl
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.