A display device includes: a substrate; a display medium layer disposed on the substrate; and a polarizer having a first film, a second film and a third film sequentially laminated on the display medium layer. The second film connects to the first film. The third film connects to the second film. A first bottom surface of the first film has a first edge. A second bottom surface of the second film has a second edge. A third bottom surface of the third film has a third edge. A first minimum distance exists between projections of the first edge and the second edge on the substrate in a first direction perpendicular to a normal direction of the substrate, and a second minimum distance exists between the second edge and the third edge on the substrate in the first direction. The first minimum distance is different from the second minimum distance.