| 摘要 |
In a general aspect, a method for transmitting data between an NFC card and an external NFC device via a selected interface (e.g., contact or contactless), and further via a contactless interface of the NFC module when the contact interface of the NFC card is selected can include using an NFC card that includes an antenna circuit having an antenna coil with a magnetic axis and an electrically conductive screen extending near the antenna coil. The magnetic axis of the antenna coil can be substantially parallel to a plane defined by the NFC card and not cross the conductive screen. The contactless interface of the NFC card, when selected by the NFC card, can emit data by emitting bursts of magnetic field from the antenna coil, so as to compensate for effects of the conductive screen on a maximum distance for transmitting data by load modulation. |
| 主权项 |
1. A method for communication between a Near Field Communication (NFC) card installed in a terminal and an external NFC device, the method comprising:
detecting, by the NFC card, an NFC module connected to a contact interface included in the NFC card, the NFC card further including a contactless interface, the NFC module including a contactless interface; selecting, by the NFC card for communication with the external NFC device, one of the contactless interface of the NFC card and the contact interface of the NFC card; and transmitting data between the NFC card and the external NFC device via the selected interface, and further via the contactless interface of the NFC module when the contact interface of the NFC card is selected, the NFC card further including:
an antenna circuit having an antenna coil with a magnetic axis; andan electrically conductive screen extending near the antenna coil, the magnetic axis of the antenna coil being substantially parallel to a plane defined by the NFC card and not crossing the conductive screen,the contactless interface of the NFC card, when selected by the NFC card, emitting data by emitting bursts of magnetic field from the antenna coil so as to compensate for effects of the conductive screen on a maximum distance for transmitting data by load modulation. |
