A non-quadrangular display panel includes a plurality of first signal lines disposed in a non-quadrangular display area, wherein the non-quadrangular display area includes a plurality of pixels. A switching circuit is disposed in a peripheral area of the non-quadrangular display panel. The peripheral area is disposed adjacent to the non-quadrangular display area. The switching circuit passes a signal to at least one of the plurality of first signal lines. A plurality of second signal lines is disposed in the peripheral area. At least two adjacent second signal lines are uniformly spaced apart from each other and transmit signals at different times to the switching circuit. A plurality of third signal lines is disposed in the peripheral area orthogonal to the plurality of second signal lines and connected to the switching circuit.