Display apparatus, Door and Refrigerator having the same

The present invention is a frame which is mounted so as to be movable to a subject; A display panel mounted to the frame; Detector placed in the frame and outputting a signal corresponding to the movement of the frame; And based on a signal to a control unit for controlling at least one of a transparent state and an image displayed on the display panel on the basis of the movement progress of the movement determines the status of the frame and determine the frame. Proceeding the present invention can reduce the manufacturing cost of the display device and the door since the detection unit is installed only on the display device and the door itself, it is possible to simplify the manufacturing process, as well as open and closed, that is, the state of 1 and 0 of the door opening and closing it can be seen from the state can be varied for the video display scenario.