Method of determining touch coordinate and touch panel assembly for performing the same

A touch panel assembly, comprising:

• a touch panel comprising a first substrate and a second substrate, wherein the first and second substrates overlap with each other, the first substrate comprises at least one first touch electrode, and the second substrate comprises at least one second touch electrode;
• and
• a touch panel driver configured to:
• detect a touch cell among a plurality of touch cells, wherein the plurality of touch cells are defined by a plurality of areas in the touch panel in which the first and second touch electrodes overlap with each other,
• detect a touch position in the detected touch cell based on a first electrical signal measured at least one of a plurality of terminals of the first and second touch electrodes,
• determine a number of touches based on a distance between a first touch and a second touch,
• determine expected touch coordinates corresponding to the number of touches,
• determine a touch coordinate based on a second electrical signal measured at least one of the plurality of terminals of the first and second touch electrodes, and the expected touch coordinates, and
• drive the touch panel.