For example, as shown in FIG. 4A, the second electrode 142 is electrically connected with one of the source electrode 1441 and the drain electrode 1442 through a via hole in the passivation layer 108 and the planarization layer 109 which are between the second electrode 142 and the source/drain electrode.
FIG. 4A only illustratively shows a thin film transistor electrically connected with the second electrode, and the thin film transistor can be a light emitting control transistor in a pixel circuit included in the display panel. For example, the pixel circuit in the embodiment of the present disclosure can include a 7T1C (i.e., seven transistors and one capacitor) structure, but is not limited thereto, and the pixel circuit can also include a 7T2C structure, a 6T1C structure, a 6T2C structure, or a 9T2C structure, etc.
