Patent ID: 9152285
Filing Date: 2015-10-06
Classification: G06F

Abstract:
1. A method comprising: applying a drive signal to a first electrode of a sensor to generate an electric field extending at least in part from the first electrode toward a second electrode of the sensor, the electric field comprising a first portion and a second portion, the first portion extending farther away from a plane of the first electrode than the second portion; shunting the second portion of the electric field away from the second electrode; receiving a sense signal from the second electrode produced at least in part by the first portion of the electric field, the sense signal indicating whether an object has come within proximity of the sensor; after receiving the sense signal from the second electrode, applying a drive signal to a third electrode of the sensor to generate another electric field extending at least in part from the third electrode toward a fourth electrode of the sensor, the other electric field comprising a third portion and a fourth portion, the third portion extending farther away from a plane of the third electrode than the fourth portion; shunting the fourth portion of the electric field away from the fourth electrode; and receiving another sense signal from the fourth electrode produced at least in part by the third portion of the electric field, the other sense signal indicating whether the object has come within proximity of the sensor.