Force sensor having force sensor electrodes, display device including the same, and method for driving the same

A display device comprising:

• a display panel including a display area having pixels configured to display an image;
• a force sensor disposed on one surface of the display panel to sense a force applied from an outside, and including a sensor hole which transmits light in a thickness direction of the display panel;
• and
• an optical sensor disposed to overlap the sensor hole in the thickness direction of the display panel and configured to sense light incident through the sensor hole,
• wherein the force sensor includes a first force sensor electrode and a first sub-force sensor electrode disposed on a first side of the sensor hole and a second sub-force sensor electrode disposed on a second side opposite to the first side of the sensor hole, and
• wherein the force sensor overlaps the display area of the display panel in the thickness direction.

A method of driving a force sensor, the method comprising:

• applying driving signals to the first force sensor electrodes, and detecting sensing signals from the second force sensor electrodes;
• analyzing the sensing signals to calculate force values of force sensing cells disposed in crossing regions of the first force sensor electrodes and the second force sensor electrodes, respectively;
• and
• calculating a force value of the sensor hole using the force values,
• wherein the calculating the force value of the sensor hole using the force values comprises:
• calculating the force value of the sensor hole using a lookup table storing the force value of the sensor hole according to the sum of the force values.