a display apparatus includes : a cylindrical casing which is rotatably driven ; and a plurality of curve - arranged displays which are installed inside the casing and have the same number as a plurality of slits formed in the casing , wherein the curve - arranged displays include a light housing which is an approximately semi - cylindrical column having a hollow structure , and a plurality of display device substrates installed on an arc - shaped side surface of the approximately semi - cylindrical column of the light housing .