Removable conductive layer that shields and/or shorts nodes of an NFC circuit to control transmissions therefrom
US9408238B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 2014 |
| Grant date | Aug 2, 2016 |
| Priority date | — |
| Expiry date | Aug 26, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B5/45
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An apparatus includes an NFC circuit and an electrically conductive layer. The NFC circuit includes an antenna configured to inductively couple to signals emitted by another NFC circuit, a charging circuit configured to output power provided by the inductive coupling through the antenna to the signals emitted by the other NFC circuit, and a transceiver circuit configured to be powered by the charging circuit to transmit data for receipt by the other NFC circuit. The electrically conductive layer is removable from being on the NFC circuit, and while the electrically conductive layer is on the NFC circuit the transceiver circuit is prevented from transmitting. The electrically conductive layer can include a removable conductive sticker that electrically connects to one or more locations on the antenna, to a ground plane of the NFC circuit, and/or to another circuit node of the NFC circuit to prevent the transceiver circuit from transmitting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.