A processing system includes a sensor module and a determination module. The sensor module is configured to perform a capacitive scan using electrodes disposed in a display device in a first area. The determination module is configured to determine, using the capacitive scan, a bending response of an input surface covering the first area and a second area. The bending response results from an input force being applied to the input surface in the second area. The determination module is further configured to determine, using the bending response, a force estimate of the input force, and determine, based on the force estimate, whether to perform an interface action.