A display device including a backlight plate, a first panel, and a second panel is provided. The first panel is disposed on the backlight plate and includes a first liquid crystal layer and an upper substrate disposed on the first liquid crystal layer. The second panel is disposed on the first panel and includes a bottom substrate and a second liquid crystal layer disposed on the bottom substrate. The first panel includes a plurality of first pixels. The second panel includes a plurality of second pixels. A ratio relationship between the first panel and the second panel is 0.220 ⁢ 9 × ( Y X ) 2 ≤ R 2 R 1 ≤ 0 . 7 ⁢ 9 ⁢ 2 ⁢ 1 × ( Y X ) 2 wherein Y is a distance between the bottom surface of the upper substrate and the top surface of the bottom substrate, X is a pixel pitch between the second pixels, R1 is the number of first pixels, and R2 is the number of second pixels.