A display apparatus includes a main panel which displays video, a sub panel which projects and provides the video displayed on the main panel by including a first lens array and a second lens array facing the first lens array so as to share a focus with the first lens array, a hinge which connects the sub panel and the main panel in a manner in which the sub panel is displaceable from the main panel according to user manipulation, a sensor which senses angles formed by the main panel and the sub panel, and a controller which controls so that the video is adjusted based on the sensed angles and displayed on the main panel.