A display device comprises a display panel, an optical film and a convex lens. The display panel comprises a central axis, a display area, and a non-display area, wherein the non-display area is outside the region of the display area. The optical film is disposed near one side of the display panel and the convex lens is disposed near the other side of the display panel. The optical film comprises a microstructure configured to diverge incident light entered into the display panel and to redirect a portion of incident light near the border between the display area and non-display area to the non-display area. The convex lens is configured to converge the output light from the display panel and redirect the output light approximately parallel to the central axis.