An array substrate includes a base substrate, an input pad part, a first output part, a second output pad part, a pixel array, and a signal transmitting part. The input pad part and the first output pad part are disposed at the chip mounting area of the base substrate. The second output pad part is also disposed at the chip mounting area, but disposed within a layer different from the first output pad part. The pixel array is disposed at an array area of the array substrate. The signal transmitting part is disposed at a signal transmitting area of the array substrate. Therefore, the first and second output pad parts are disposed at different layers, respectively, so that a space utilizing efficiency of the array substrate is enhanced.