A touch panel includes an insulated substrate including a planar part and a folded part extending from the planar part; a transparent conductive layer located on the planar part and the folded part; a plurality of planar electrodes located on the planar part and electrically connected to the transparent conductive layer; and at least one side electrode located on the folded part and electrically connected to the transparent conductive layer on the folded part. The planar electrodes, the transparent conductive layer and the planar part are formed into a planar touch module configured to detect a planar input signal resulted from the planar part. The at least one side electrode the folded part and the transparent conductive layer on the folded part are formed into a side touch module configured to sense a side input signal resulted from at least one virtual key corresponding the at least one side electrode.