3-coil wireless power transfer system for eye implants
US10251780B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 24, 2015 |
| Grant date | Apr 9, 2019 |
| Priority date | — |
| Expiry date | Aug 11, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F2027/2809
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A three-coil electromagnetic induction power transfer system is disclosed for epiretinal prostheses and other implants. A third, buffer coil is disposed between an external transmitting coil and a receiver coil buried within the body to improve efficiency and robustness to misalignments. One or more of the coils can be manufactured using micromechanical machining techniques to lay out conductors in a ribbon of biocompatible insulator, folding lengths of the insulated conductor traces longitudinally over one another, and then spiraling them into a ring. The traces change axial position in the ring by shifting across fold lines. One or more U-shaped sections on the traces can be folded so that adjacent traces can project opposite one another, lengthening the resulting ribbon that can be wound into a coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.