US Patent 9658726 Single layer sensor pattern

A capacitive sensor array comprises large sensor electrodes and small sensor electrodes formed from a single layer of conductive material. Each sensor electrode of a first set of small sensor electrodes is electrically connected to a first pad. A first axis crosses two or more of the sensor electrodes of the first set of small sensor electrodes, and each small sensor electrode of the first set of small sensor electrodes is located on an opposite lateral side of one of the large sensor electrodes from another small sensor electrode of the first set. Each sensor electrode of a second set of small sensor electrodes is electrically connected to a second pad. A second axis crosses two or more of the sensor electrodes of the second set of small sensor electrodes, and each small sensor electrode of the second set is located on an opposite lateral side of one of the large sensor electrodes from another small sensor electrode of the second set.