The display apparatus includes a display including a touch screen; a plurality of transducers provided to be spaced apart from each other at edges of the touch screen, and configured to transmit and receive an ultrasonic signal with respect to the touch screen; and a processor configured to identify a touch position on the touch screen based on the ultrasonic signal transmitted and received by the plurality of transducers, wherein the transducer includes a plurality of electrodes arranged from an edge side of the touch screen toward an inner side of the touch screen, and a first electrode at the edge side among the plurality of electrodes is shorter than a second electrode at the inner side.