A display device is provided. The display device includes a first substrate, a second substrate, a patterned electrode, a switch unit, and a liquid-crystal layer doped with a chiral dopant. The second substrate is disposed corresponding to the first substrate, and the patterned electrode is disposed on the first substrate or the second substrate. The switch unit is disposed adjacent to the patterned electrode. The liquid-crystal layer doped with the chiral dopant is disposed between the first substrate and the second substrate. In addition, an edge of the patterned electrode that is closest to the switch unit has an open area and a closed area, wherein the open area is adjacent to the closed area, and the patterned electrode extends a connecting portion out from the closed area and the connecting portion is connected to the switch unit.