US Patent 10143096 Rollable display device

Provided is a rollable display device including a rotatable roller, a fixing portion surrounding the roller and including a first slit, a rotating portion surrounding the fixing portion and including a second slit, a gear assembly transferring torque of the roller to the rotating portion so that a rotation direction of the rotating portion is opposite to a rotation direction of the roller, and a flexible display panel. The gear assembly includes a plurality of gears installed in the roller, the fixing portion and the rotating portion. The flexible display panel includes a first area positioned between the roller and the fixing portion of which one end is fixed to the roller, a second area positioned to pass through the first slit, and a third area extended from the second area.