A display with a photo sensor is provided, wherein the photo sensor is integrated with an active device array substrate of the display and fabricated through an existing process to reduce the manufacturing cost. A photosensitive silicon-rich dielectric layer or any other photosensitive material layer having similar photosensitive characteristics (for example, a photosensitive semiconductor layer) is adopted to form the photo sensor with a lower electrode and a transparent upper electrode. Thereby, the fill factor of the photo sensor is maximized and noises caused by a backlight source electrode are eliminated.