Apparatus for driving of a touch panel having a dummy electrode and haptic mode

An apparatus comprising:

• a touch panel including a plurality of touch driving electrodes, an elastic dielectric member provided on the plurality of touch driving electrodes, and a plurality of touch sensing electrode groups provided on the elastic dielectric member and respectively intersected and overlapped with the plurality of touch driving electrodes, wherein each of the touch sensing electrode groups includes a touch sensing electrode and a first dummy electrode being in parallel to each other on the elastic dielectric member;
• and
• a touch driving circuit configured to:
• in a touch point sensing mode, electrically float the first dummy electrode in a unit of a touch sensing electrode group and sense a change of capacitance through the touch sensing electrode of the touch sensing electrode group, and
• in a haptic mode, apply a voltage to a touch driving electrode and apply a reference voltage to the touch sensing electrode group, wherein the first dummy electrode of the touch sensing electrode group is electrically connected with the touch sensing electrode in the unit of the touch sensing electrode group in the haptic mode, and
• wherein the touch driving circuit generates touch force sensing data by electrically connecting the first dummy electrode to the touch sensing electrode in the unit of the touch sensing electrode group and sensing another change of capacitance through the touch sensing electrode while supplying a touch driving pulse to the touch driving electrode in accordance with a touch force sensing mode.