A display panel can include sub-pixels arranged in a matrix configuration, in which each of at least one of the sub-pixels includes a light emitting device, a driving transistor to supply a driving current to the light emitting device, and a storage capacitor to maintain, for a certain period of time, a voltage for controlling a magnitude of the driving current. Also, the storage capacitor includes a bottom electrode, a buffer layer disposed on the bottom electrode, a middle electrode covering a portion of the buffer layer, a gate insulating layer covering the middle electrode and the buffer layer, and an upper electrode covering a portion of the gate insulating layer, and in the buffer layer, a thickness of a first area covered by the middle electrode is greater than a thickness of a second area that is in contact with the gate insulating layer.