US Patent 10420227 Electronic apparatus having flexible display device

A disclosed electronic device includes a housing having an opening, a roll mounted in the housing, a flexible display wound on the roll and being extendable and retractable through the opening based on a rotation direction of the roll, and a roll guide configured to guide the roll to move in a direction capable of constantly maintaining a proceeding direction of the flexible display toward the opening in the housing, based on a variation in a wound length of the flexible display on the roll.