A display part (1) for detecting an external input by means of a photo sensor (8) includes an active matrix substrate (4) including the photo sensor (8), an opposite substrate (6) facing the active matrix substrate (4), a liquid crystal layer (5) interposed between the active matrix substrate (4) and the opposite substrate (6), and a protective plate (3) that covers the surface of the opposite substrate (6) on the side opposite to the surface thereof adjacent to the liquid crystal layer (5). A non-flat portion (7) is formed on the protective plate (3) in a region that is a part of the surface on the side opposite to the surface contacting with the opposite substrate (6) and that faces the photo sensor (8), whereby a position on which contact is made from outside can be recognized more clearly.