An exemplary display device includes a support member, a pair of displays slidably attached to the support member, and positioning members disposed between the displays and the support member. The support member includes a straight slideway, and a curved slideway defined therein. The curved slideway includes a slanting portion, and a first straight portion and a second straight portion extending out from opposite ends of the slanting portion. The straight slideway is parallel to the first straight portion of the curved slideway and in line with the second straight portion of the curved slideway. The displays are slidably received in the straight slideway and the curved slideway respectively. The displays may be positioned to form a large screen, or slid to overlap leaving a single display visible.