A single layered electrode structure includes a plurality of first electrode groups arranged along a first direction, a plurality of second electrode groups arranged along the first direction, and a plurality of third electrodes arranged along the first direction. Each of the first electrode groups includes at least one first electrode arranged along a second direction. Each of the second electrode groups includes a plurality of second electrodes arranged along the second direction, with each of the second electrodes at least corresponding to the at least one first electrode. Each of the third electrodes is arranged as one of combinations of between two of the first electrode groups, between two of the first electrode groups, and between one of the first electrode groups and one of the second electrode groups.