A display device includes a plurality of display panels. Each of the display panels includes a substrate and a light blocking member. The substrate includes a display area and a peripheral area, and the display area includes sub-pixel areas. The light blocking member is disposed in the display area and the peripheral area on the substrate, and a plurality of openings is defined through the light blocking member to overlap the sub-pixel areas. A first width of the light blocking member located between two adjacent openings among the openings is twice a width of the light blocking member located in the peripheral area.