Proximity detection via magnetic resonance coupling
US9803971B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2011 |
| Grant date | Oct 31, 2017 |
| Priority date | — |
| Expiry date | Jun 10, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W8/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic resonance technology is used to implement front and back proximity sensing capability for wireless devices such as a laptap device. For example, a high quality (Q) factor coil antenna may be embedded in a display, such as a liquid crystal display, of a first laptap device to detect other wireless devices (e.g., a second laptap) that are within coupling distance of the first laptap device. In this example, the second laptap device induces a sine wave signal to the first laptap device if the second laptap device is physically located at backside of the first laptap device. Otherwise, the second laptap device may induce a cosine wave signal to the first laptap device if the second laptap device is physically located at the front side of the first laptap device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.