Contact lens that facilitates antenna communication via sensor impedance modulation
US8870370B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2012 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Apr 24, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/01
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Systems, contact lenses and methods that facilitate antenna communication via sensor impedance modulation are provided. In one aspect, a system can include a contact lens and a radio frequency (RF) reader. The contact lens can include a substrate; an RF antenna, disposed on or within the substrate; and a sensing component, disposed on or within the substrate, and directly coupled to the RF antenna, wherein the RF antenna is configured to change impedance value as a sensed value of the sensing component changes. The RF reader is external to the contact lens, and configured to interrogate the RF antenna with an RF signal. The RF reader can receive a reflected RF signal from the RF antenna in response to the interrogation. The magnitude, phase and/or a frequency of the reflected RF signal can be based on the impedance value of the RF antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.