Display device including chain units and driving sprockets

A display device comprising:

• a display panel;
• a roller disposed around which the display panel is wound or from which the display panel is unwound;
• a first spring disposed in the roller;
• a plurality of chain units connected to the display panel and configured to move the display panel in an upward/downward direction;
• a plurality of driving sprockets disposed to engage with the plurality of chain units and configured to move the plurality of chain units;
• a plurality of second springs connected to the plurality of driving sprockets;
• and
• a housing part configured to accommodate the display panel and the roller,
• wherein the plurality of driving sprockets each comprises a central shaft to which one end of each of the plurality of second springs is fixed, and
• wherein the housing part comprises a spring fixing part to which the other end of each of the plurality of second springs is fixed.