A display device includes a substrate, a cover layer, a liquid crystal layer, at least one electrode, and a sealant layer. The cover layer is disposed on the substrate and includes a tunnel-shaped cavity. The liquid crystal layer is disposed in the tunnel-shaped cavity. The at least one electrode is configured to apply an electric field to the liquid crystal layer. The sealant layer is configured to seal the tunnel-shaped cavity. The liquid crystal layer includes a plurality of domains defined by liquid crystal molecules pre-aligned in different directions.