Display device and driving method for the same

A method for driving a display device, including a flexible display panel including a plurality of touch sensing areas, a plurality of touch input electrodes arranged in a first direction and a plurality of touch output electrodes arranged in a second direction, a sensing scan driver supplying a plurality of sensing input signals to the plurality of touch input electrodes, a sensing signal processor receiving a plurality of sensing output signals through the plurality of touch output electrodes, and a signal controller, the flexible display panel divided into a plurality of touch sensing areas, and when the flexible display panel stretches in the first direction by a predetermined first threshold value or more, one touch input electrode and a pair of touch output electrodes correspond to one of the touch sensing areas, the method comprising:

• applying a test voltage to the touch input electrodes to generate a first stretch signal providing an indication of a change amount of a resistance value of each of the touch input electrodes;
• applying a test voltage for generating a second stretch signal providing an indication of a change amount of a resistance value of each of the touch output electrodes;
• and
• determining lengths to which the flexible display panel stretches in the first direction and the second direction based on the first stretch signal and the second stretch signal.