Foldable display device

A foldable display device, comprising:

• a first support member comprising a first flat surface, a second flat surface, a first arc surface, and a second arc surface, wherein the second flat surface is parallel to the first flat surface, and the first arc surface and the second arc surface connect the first flat surface and the second flat surface and extend along a first axis;
• a primary display screen fixed on the first support member and comprising a first primary display screen covering the first flat surface, a second primary display screen covering the first arc surface and connected to one side of the first primary display screen, and a third primary display screen covering the second arc surface and connected to another side of the first primary display screen;
• a second support member rotatably connected to the first support member;
• and
• a secondary display screen fixed on the second support member;
• wherein when the secondary display screen is in a storage state, the first primary display screen, the second primary display screen, the third primary display screen, and the secondary display screen form a 360° surround screen;
• and
• when the secondary display screen is spread to a same plane as the first primary display screen, the first primary display screen and the secondary display screen form a spliced display screen.