A display panel is provided including a substrate including a display area comprising first pixels and a sensor area including second pixels and a transmission portion. A display element layer is disposed on the substrate, the display element layer comprising the first pixels electrically connected to a first thin film transistor and the second pixels electrically connected to a second thin film transistor. A conductive layer is disposed between the second thin film transistor and the substrate, the conductive layer having two or more steps at an edge thereof.