An organic electroluminescent display unit including at least one transistor electrically connected to a scan line and a data line; a first photo-sensor including a first reflective bottom electrode, a first photo-sensitive layer and a first transparent top electrode; a second photo-sensor including a second reflective bottom electrode, a second photo-sensitive layer and a second transparent top electrode, the first photo-sensor being electrically connected to the second photo-sensor; a reflective conductive layer including a pixel electrode, a light-shielding pattern, and a connection pattern, the pixel electrode being electrically connected to the transistor, the light-shielding pattern being electrically connected to the second transparent top electrode and entirely covered the second photo-sensitive layer, and the connection pattern electrically connected to the first transparent top electrode, the first reflective bottom electrode, and the second reflective bottom electrode; an organic electroluminescent layer; and a cathode layer.