Portable electronic device capable of expanding transmission distance for near field communication functions

摘要

A portable electronic device capable of expanding transmission distance of NFC is provided. The portable electronic device includes a watch-strap portion, a power module, an NFC module, and a relay coil group arranged in the watch-strap portion. The power module includes a wireless charging coil, and the NFC module includes an NFC antenna. The relay coil group is configured to relay external electromagnetic power from an external power source to the power module by the coil group being magnetically coupled with the wireless charging coil. The relay coil group is also configured to relay NFC information between the NFC module and an external NFC read-write device or an external NFC storing device by the coil group being magnetically coupled with the NFC antenna. Therefore, the distances for both charging and NFC functions are expanded.

主权项

1. A portable electronic device comprising:
a body; a watch-strap portion configured to attach the portable electronic device on a wrist of a user; a power module comprising a wireless charging coil, a wireless charging circuit, and a rechargeable battery connected in that order; an NFC module comprising an NFC antenna and an NFC circuit connected to the NFC antenna; a relay coil group arranged in the watch-strap portion and comprising a magnetic resonant coil having approximately the same resonant frequency as the wireless charging coil and the NFC antenna, the relay coil group configured to transfer external electromagnetic power from an external power source to the power module by the relay coil group being magnetically coupled between the external power source and the wireless charging coil; the relay coil group also configured to transfer NFC information between the NFC module and an external NFC device by the relay coil group being magnetically coupled between the external NFC device and the NFC antenna; and a control module connected to the power module and the NFC module, wherein the control module is configured to enable the power module and disable the NFC module, so that the magnetic resonant coil is magnetically coupled with the wireless charging coil to charge the portable electronic device; the control module is also configured to enable the NFC module and disable the power module, so that the magnetic resonant coil is magnetically coupled with the NFC antenna to enable the portable electronic device to perform NFC functions.