NEAR FIELD COMMUNICATION (NFC) COEXISTANCE
First Claim
1. An apparatus for wireless charging, comprising:
- a wireless charging circuit configured to selectively generate a wireless charging field; and
an impedance detection circuit coupled to the wireless charging circuit and configured to detect an impedance change corresponding to the wireless charging field; and
a proximity detection circuit configured to selectively detect proximity of one or more electronic devices that are prone to damage by the wireless charging circuit, wherein detecting the proximity of the one or more electronic devices is activated based on detecting the impedance change, and wherein generating the wireless charging field comprises reducing a transmit power of the wireless charging field based on detecting the impedance change.
1 Assignment
0 Petitions
Accused Products
Abstract
Certain aspects of the present disclosure are generally directed to apparatus and techniques for protecting electronic devices that may be prone to damage by wireless charging fields. For example, the apparatus may include a wireless charging circuit configured to selectively generate a wireless charging field and an impedance detection circuit coupled to the wireless charging circuit and configured to detect an impedance change corresponding to the wireless charging field. In this case, a proximity detection circuit may selectively detect proximity of one or more electronic devices that are prone to damage by the wireless charging circuit. In some aspects, detecting the proximity of the one or more electronic devices is activated based on detecting the impedance change, and wherein generating the wireless charging field comprises reducing a transmit power of the wireless charging field based on detecting the impedance change.
12 Citations
30 Claims
-
1. An apparatus for wireless charging, comprising:
-
a wireless charging circuit configured to selectively generate a wireless charging field; and an impedance detection circuit coupled to the wireless charging circuit and configured to detect an impedance change corresponding to the wireless charging field; and a proximity detection circuit configured to selectively detect proximity of one or more electronic devices that are prone to damage by the wireless charging circuit, wherein detecting the proximity of the one or more electronic devices is activated based on detecting the impedance change, and wherein generating the wireless charging field comprises reducing a transmit power of the wireless charging field based on detecting the impedance change. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. An apparatus for wireless charging, comprising:
-
a wireless charging circuit; a proximity detection circuit; a first coil having a first terminal coupled to the first wireless charging circuit and a second terminal coupled to the proximity detection circuit; a second coil having a first terminal coupled to the wireless charging circuit and a second terminal coupled to the proximity detection circuit; at least one first switch coupled between the first terminals of the first coil and the second coil; and at least one second switch coupled between the second terminals of the first coil and the second coil. - View Dependent Claims (18, 19)
-
-
20. A method for wireless charging, comprising:
-
selectively generating a wireless charging field; detecting an impedance change corresponding to the wireless charging field; and selectively detecting proximity of one or more electronic devices that are prone to damage by the wireless charging field, wherein detecting the proximity of the one or more electronic devices is activated based on detecting the impedance change, and wherein generating the wireless charging field comprises reducing a transmit power of the wireless charging field based on detecting the impedance change. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
-
-
28. A method for wireless charging, comprising:
-
selectively generating a wireless charging field; and detecting an impedance change corresponding to the wireless charging field; and selectively detecting proximity of one or more electronic devices that are prone to damage by the wireless charging field, wherein detecting the proximity of the one or more electronic devices is activated based on detecting the impedance change, and wherein generating the wireless charging field is disabled based on detecting the impedance change, wherein the one or more electronic devices comprise at least one of an near field communication (NFC) card or radio-frequency identification (RFID) card, and wherein selectively detecting proximity of one or more electronic devices comprises modulating a detection field for detecting the at least one NFC card or RFID card, wherein detecting the at least one NFC card or RFID card is based on receiving information via modulation of the detection field by the at least one NFC card or RFID card. - View Dependent Claims (29, 30)
-
Specification