A display device includes a flexible display panel, a light module and an optical film. The flexible display panel has a first axis and curving about the first axis as an axis of curvature. The light module is located on one side of the flexible display panel. The optical film is located between the flexible display panel and the light module. The optical film includes a substrate and multiple first strip microstructures. The substrate has a first side and a second side that are opposite to each other. The first side faces the light module while the second side faces the flexible display panel. The first strip microstructures are located on the first side of the substrate, and the first strip microstructures extend along a second axis.