Method and system for detecting an object or body based on changes in signal phases
AssigneeLogitech Europe S.A.
InventorsFrederic Fortin, Laurent Cariou, Philippe Chazot
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Abstract
Embodiments of the invention are directed to control devices configured for use with computing devices. More specifically, the present invention relates to methods and devices for performing presence detection of an object body near a device. The methods and devices described herein may include comparing a reference signal against an over the air signal to determine whether a phase difference exists between the reference signal and the over the air signal. The existence of a phase difference may be indicative of a object or body in proximity to the device.
Claims33
A device comprising:
- a transmitter configured to emit a signal;
- an in-phase divider coupled to the transmitter and configured to receive the signal and split the signal into two transmission signals;
- a reference transmission line operable to transmit a first transmission signal;
- a transmitting antenna coupled to the reference transmission line;
- a receiving antenna operable to receive a second transmission signal broadcast from the transmitting antenna;
- a combiner operable to receive:
- the first transmission signal from the reference transmission line;
- and
- the second transmission signal from the receiving antenna;
- and
- a receiver operable to compare the first transmission signal and the second transmission signal and generate a compared signal.
A method for performing presence detection of a body near a device, the method comprising:
- emitting, by a transmitter, a signal;
- receiving, at an in-phase divider coupled to the transmitter, the signal, and splitting the signal into two transmission signals;
- transmitting, by a reference transmission line, a first transmission signal;
- receiving, at a receiving antenna, a second transmission signal;
- receiving, at a combiner, the first transmission signal from the reference transmission line and the second transmission signal from the receiving antenna;
- comparing, by a receiver, the first transmission signal and the second transmission signal;
- and
- generating a comparison signal.
A non-transitory computer-readable storage medium comprising a plurality of computer-readable instructions tangibly embodied on the computer-readable storage medium, which, when executed by a data processor, provides a method for performing presence detection of a body near a device, the plurality of instructions comprising:
- emitting, by a transmitter, a signal;
- receiving, at an in-phase divider coupled to the transmitter, the signal, and splitting the signal into two transmission signals;
- transmitting, by a reference transmission line, a first transmission signal;
- receiving, at a receiving antenna, a second transmission signal;
- receiving, at a combiner, the first transmission signal from the reference transmission line and the second transmission signal from the receiving antenna;
- comparing, by a receiver, the first transmission signal and the second transmission signal;
- and
- generating a comparison signal.
Dependencies are inferred from the claim text.