US 9,803,971 B2 · Proximity detection via magnetic resonance coupling

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.

Claims14

Dependent claims

A method of proximity detection via magnetic resonance coupling comprising:

configuring a first wireless device that includes a processor, and receiver to receive magnetic resonance signal from a second wireless device;
determining bearing location of a second wireless device based on a signal phase of the received magnetic resonance signal, wherein the bearing location includes the second wireless device to be physically located at front side or at backside of the first wireless device, wherein the signal phase received from the second wireless device located at the backside of the first wireless device is one hundred eighty degrees (180°) out of phase with the signal phase received when the second wireless device is located at the front side of the first wireless device;
and
providing the bearing location to a user.

1 more element

Dependencies are inferred from the claim text.

Proximity detection via magnetic resonance coupling

Life of this patent

Proximity detection via magnetic resonance coupling

Life of this patent

Abstract

Claims14