Foldable display device having adjustable support units retreatable into recessed portions of set frames

A foldable display device configured to be switched between

• a folded state and an unfolded state, the foldable display device comprising:
• a display panel including a folding area and non-folding areas;
• set frames supporting the non-folding areas, and including recessed portions corresponding to the folding area;
• and
• adjustable support units configured to support the display panel of the foldable display device together with an inner surface of the set frames in the unfolded state and including a second hinge connecting unit which extends from an intermediate point between both end portions of a lower surface of each adjustable support unit to a hinge unit, the second hinge connecting unit of each adjustable support unit rotates about a second hinge shaft of the hinge unit,
• wherein the recessed portions of the set frames are empty spaces formed across a majority of a width direction of the set frames,
• wherein the inner surface of each set frame includes a first lower surface contacting the adjustable support unit in the folded state, a seating surface on which an end portion of the adjustable support unit is supported in the unfolded state, an inclined surface connecting from the seating surface to the first lower surface to have a slope with the first lower surface and the seating surface, and a second lower surface that supports one non-folding area of the display panel, and
• wherein, in the folded state, portions of the display panel corresponding to the adjustable support units in the folding area are parallel to the non-folding areas, and another portion of the display panel corresponding to the hinge unit in the folding area is perpendicular to the non-folding areas.