Heat management in wireless electronic devices
An eyewear device has an antenna system having at least one element which contributes to wireless signal transmission, and which is thermally connected to a heat-generating electronic component of the eyewear device to serve as a heat sink for the electronic component. A driven antenna element and/or a plurality of PCB extenders electrically connected to a PCB ground plane can thus be employed for both signal transmission and heat management.
1. An eyewear device comprising:
an eyewear body comprising:
an eyewear frame defining one or more optical element holders for holding respective optical elements within view of a user when the eyewear device is worn; and
a pair of temples connected to the eyewear frame for supporting the eyewear frame in position during wear;
a driven antenna element incorporated in the eyewear frame;
a printed circuit board (PCB) that is housed by the device body and that carries on-board communication electronics coupled to the driven antenna element to communicate wireless signals via the driven antenna element, the PCB defining a PCB ground plane coupled to the communication electronics for co-operation with the driven antenna element in signal communication; and
a PCB extender comprising a conductor electrically connected to the PCB ground plane and projecting from the PCB for co-operation with the driven antenna element in signal communication, the PCB extender extending along an associated one of the pair of temples.
2. The eyewear device of claim 1 , wherein the PCB extender comprises a wire extending along the associated temple.
3. The eyewear device of claim 1 , wherein the PCB extender forms a core wire that provides structural integrity to the associated temple.
4. The eyewear device of claim 1 , wherein the PCB extender comprises a thermally conductive element that is connected to the PCB to be in heat transfer relationship with one or more heat sources on the PCB, thereby to serve as a heat sink for the electronics on the PCB.
5. The eyewear device of claim 1 , wherein the PCB extender comprises a wire that extends along the associated temple, the PCB extender wire being configured to provide both:
a core wire that provides structural integrity to the associated temple; and
a heat sink for the electronics on the PCB, the PCB extender wire being connected to the PCB to be in heat transfer relationship with one or more heat sources on the PCB.
6. The eyewear device of claim 1 , wherein said PCB extender forms part of a plurality of PCB extenders incorporated in the eyewear body and connected to the PCB ground plane for cooperation with the driven antenna element in signal communication.
7. The eyewear device of claim 6 , wherein the plurality of PCB extenders comprise a pair of PCB extenders projecting from the PCB in mutually transverse orientations, the pair of PCB extenders defining a pair of mutually transverse ground planes for the driven antenna element.
8. The eyewear device of claim 7 , wherein the driven antenna element projects from the PCB in a direction transverse to both of the pair of PCB extenders.
9. The eyewear device of claim 6 , wherein the plurality of PCB extenders include a PCB extender incorporated in the eyewear frame.
10. The eyewear device of claim 9 , wherein the PCB extender incorporated in the eyewear frame extends along a part of one of the one or more optical element holders.
11. The eyewear device of claim 9 , wherein the PCB extender incorporated in the eyewear frame extends along an operatively top portion of the eyewear frame, having a sideways orientation relative to a direction of view of the eyewear device.
12. The eyewear device of claim 11 , wherein the driven antenna element extends along at least part of a respective optical element holder defined by the eyewear frame, the driven antenna element being substantially orthogonal to both the PCB extender extending along the temple and the PCB extender incorporated in the eyewear frame.
13. The eyewear device of claim 12 , wherein the one or more optical element holders comprises a lens rim extending circumferentially around a lens held therein, the driven antenna element extending circumferentially along a part of the lens rim.
14. The eyewear device of claim 6 , wherein the plurality of PCB extenders comprises a respective PCB extender extending along each of the pair of temples.
15. The eyewear device of claim 14 , wherein each PCB extender extending along one of the pair of temples is configured to form a core wire that provides structural integrity to the respective temple.
16. The eyewear device of claim 15 , wherein each PCB extender extending along one of the pair of temples is configured to serve as a heat sink for the electronics on the PCB, each PCB extender being connected in heat transfer relationship with one or more heat sources on the PCB.
17. The eyewear device of claim 16 , wherein the driven antenna element is configured to serve as an additional heatsink element to the PCB.