Systems, apparatus, and methods for ophthalmic lenses with wireless charging
An ophthalmic device includes a lens and an electronic component embedded in the lens to enhance the functionality of the lens. The ophthalmic device includes a first coil to wirelessly receive energy from an external device, such as a wireless charger, and wirelessly transmits the received energy to a second coil coupled to the electronic component so as to power the electronic component. The first coil can function as part of a repeater to facilitate the wireless charging. The repeater can receive electrical energy wirelessly and works with various positions, sizes, and shapes of the electronic component. The wireless power efficiency can also be increased using the repeater to concentrate a magnetic flux within the second coil.
1. An ophthalmic device comprising:
a spectacle lens;
a repeater coil, embedded in the spectacle lens, to receive electrical energy wirelessly from an external device;
an energy receiving coil, embedded in the spectacle lens, to receive the electrical energy wirelessly from the repeater coil; and
at least one electronic component, embedded in the spectacle lens, to consume at least a portion of the electrical energy received by the energy receiving coil.
2. The ophthalmic device of claim 1 , further comprising:
an energy storage element, embedded in the spectacle lens and operably coupled to the energy receiving coil, to store the electrical energy received by the energy receiving coil, wherein the at least one electronic component consumes the electrical energy stored in the energy storage element.
3. The ophthalmic device of claim 2 , wherein the energy storage element comprises at least one of a rechargeable battery, a capacitor, or a supercapacitor.
4. The ophthalmic device of claim 2 , wherein the energy storage element comprises a thin film battery disposed at a periphery of the at least one electronic component.
5. The ophthalmic device of claim 2 , wherein the energy storage element comprises an internal coil to receive energy from the energy receiving coil.
6. The ophthalmic device of claim 1 , wherein the repeater coil is configured to receive the electrical energy from the external device via magnetic induction.
7. The ophthalmic device of claim 1 , wherein the repeater coil is disposed about a perimeter of the spectacle lens, between the spectacle lens and a frame holding the spectacle lens, or on the frame.
8. The ophthalmic device of claim 1 , wherein the energy receiving coil is concentric with the repeater coil.
9. The ophthalmic device of claim 1 , wherein the energy receiving coil is configured to receive the electrical energy from the external device via magnetic resonance or magnetic induction.
10. The ophthalmic device of claim 1 , further comprising:
frames holding the spectacle lens.
11. The ophthalmic device of claim 1 , wherein the spectacle lens has no optical power.
12. The ophthalmic device of claim 1 , wherein the at least one electronic component comprises:
an electro-active element having a transmission that changes in response to an application of a voltage to the electro-active element.
13. The ophthalmic device of claim 1 , wherein the at least one electronic component comprises:
an electro-active element having a refractive index that changes in response to application of a voltage to the electro-active element.
14. The ophthalmic device of claim 13 , further including:
a range finder, operably coupled to the electro-active element, to measure a distance between a wearer of the ophthalmic device and an object of interest,
wherein the voltage is based at least in part on the distance.
15. The ophthalmic device of claim 1 , wherein loops of the energy receiving coil are disposed about a perimeter of the spectacle lens perpendicular to an optical axis of the spectacle lens.
16. The ophthalmic device of claim 1 , wherein loops of the energy receiving coil are disposed in a plane containing or parallel to an optical axis of the spectacle lens.