A display panel includes a display pixel configured to irradiate light, an image sensor pixel included together with the display pixel in one unit pixel, including a thin film transistor (TFT) photodetector including an active layer formed of amorphous silicon or polycrystalline silicon on an amorphous transparent material, and configured to collect light reflected from a body located on the transparent material, and a processor configured to process biometrics along with positioning of the body according to the light reflected from the body.