A display panel, comprising a plurality of switch units, wherein each of the plurality of switch units comprises: a first electrode; a second electrode; a third electrode; a fourth electrode opposite the first electrode; a piezoelectric material layer between the first electrode and the fourth electrode, wherein the piezoelectric material layer is formed on top of the first electrode, and the fourth electrode is formed on top of the piezoelectric material layer; a connecting electrode between the second electrode and the fourth electrode and between the third electrode and the fourth electrode, wherein the connecting electrode is formed on top of the fourth electrode with a layer of insulating material (a) in between; and a driving transistor comprising a driving gate, the driving gate being the third electrode; wherein an orthogonal projection of the second electrode and an orthogonal projection of the third electrode on a plane of the connecting electrode overlap the connecting electrode respectively, there are each a first distance between the second electrode and the connecting electrode and between the third electrode and the connecting electrode along a direction perpendicular to the plane of the connecting electrode, and the second electrode and the third electrode are formed above the connecting electrode, spaced apart from the connecting electrode by the first distance, and wherein the driving transistor is configured to drive an OLED component of the display panel to emit light. wherein each of the plurality of switch units comprises: a first electrode; a second electrode; a third electrode; a fourth electrode opposite the first electrode; a piezoelectric material layer between the first electrode and the fourth electrode, wherein the piezoelectric material layer is formed on top of the first electrode, and the fourth electrode is formed on top of the piezoelectric material layer; a connecting electrode between the second electrode and the fourth electrode and between the third electrode and the fourth electrode, wherein the connecting electrode is formed on top of the fourth electrode with a layer of insulating material (a) in between; and a driving transistor comprising a driving gate, the driving gate being the third electrode; a first electrode; a second electrode; a third electrode; a fourth electrode opposite the first electrode; a piezoelectric material layer between the first electrode and the fourth electrode, wherein the piezoelectric material layer is formed on top of the first electrode, and the fourth electrode is formed on top of the piezoelectric material layer; a connecting electrode between the second electrode and the fourth electrode and between the third electrode and the fourth electrode, wherein the connecting electrode is formed on top of the fourth electrode with a layer of insulating material (a) in between; and a driving transistor comprising a driving gate, the driving gate being the third electrode; wherein an orthogonal projection of the second electrode and an orthogonal projection of the third electrode on a plane of the connecting electrode overlap the connecting electrode respectively, there are each a first distance between the second electrode and the connecting electrode and between the third electrode and the connecting electrode along a direction perpendicular to the plane of the connecting electrode, and the second electrode and the third electrode are formed above the connecting electrode, spaced apart from the connecting electrode by the first distance, and wherein the driving transistor is configured to drive an OLED component of the display panel to emit light.