Near-field antenna for eyewear
Apparatuses and systems for wearable devices such as eyewear are described. According to one embodiment, the wearable device includes a frame, onboard electronics components, and an antenna disposed around an eyepiece area of the frame that is configured to hold an optical element. The antenna is configured for inductive coupling. In some embodiments, a switch coupled to the antenna allows selection between circuitry for inductive charging of a battery and near-field communication (NFC) circuitry for communicating data via the antenna.
1. A mobile device comprising:
a frame;
an antenna supported by the frame;
a temple connected to the frame at an articulated joint such that the temple is disposable between a collapsed condition and a wearable condition;
an electrical switch, wherein the electrical switch is coupled with the articulated joint;
wireless communication circuitry coupled to the electrical switch;
wireless charging match circuitry coupled to the electrical switch, wherein the electrical switch is configured to switch a connection with the antenna to the wireless communication circuitry if the temple is in the wearable condition and to the wireless charging match circuitry if the temple is in the collapsed condition.
2. The mobile device of claim 1 , wherein the frame comprises a first portion, and wherein the antenna is coupled to the frame and disposed around the frame.
3. The mobile device of claim 1 , wherein the wireless charging match circuitry comprises near field communication (NFC) match and controller circuitry.
4. The mobile device of claim I further comprising:
one or more processors coupled to the wireless communication circuitry, the wireless charging match circuitry, and the electrical switch, wherein the one or more processors are configured to control the electrical switch.
5. The mobile device of claim 4 , wherein the one or more processors are configured to communicate payment data via the antenna using the wireless communication circuitry.
6. The mobile device of claim 4 further comprising:
a camera coupled to the one or more processors, the one or more processors configured to operate the camera.
7. The mobile device of claim 1 , wherein the antenna is disposed on the frame in one or more loops around a portion of the frame.
8. The mobile device of claim 1 , wherein the antenna is disposed on the frame in a complete loop around a portion of the frame.
9. The mobile device of claim 1 further comprising
a battery coupled to the wireless charging match circuitry, wherein the battery is configured to receive a charge from a charge source via inductive coupling with the antenna.
10. The mobile device of claim 1 further comprising:
a second antenna coupled to the wireless communication circuitry, the second antenna supported by the frame.
11. The mobile device of claim 1 , wherein the mobile device is eyewear.
12. The mobile device of claim 1 wherein the electrical switch is a first electrical switch and further comprising:
one or more processors coupled to the wireless communication circuitry, the wireless charging match circuitry, and a second electrical switch, wherein the one or more processors are configured to control the second electrical switch;
a memory coupled to the one or more processors, the memory comprising instructions that, when executed by the one or more processors, cause the mobile device to perform operations comprising:
selecting, in response to a first input, a first switch position for the second electrical switch supported by the frame; and
receiving a charge from a charge source via inductive coupling with the antenna when the second electrical switch is in the first switch position.
13. The mobile device of claim 12 further comprising:
a diplexer coupled to the antenna and the wireless communication circuitry; and
radio frequency communication circuitry coupled to the antenna and the diplexer and configured to generate radio frequency signals for transmission via the antenna;
wherein the diplexer electrically separates the wireless communication circuitry and the radio frequency communication circuitry.
14. The mobile device of claim 12 , wherein the instructions further cause the mobile device to perform operations comprising:
selecting, in response to a second input, a second switch position for the second electrical switch supported by the frame; and
transmitting radio-frequency signals with the wireless communication circuitry and the antenna.
15. The mobile device of claim 14 further comprising:
a third switch supported by the frame, the third switch coupled to the one or more processors, wherein the third switch is configured to generate the first input and the second input.