Method for folding foldable display device and foldable display device

A method for folding a foldable display device, the method comprising:

• forming a base panel plate (2) in which a display panel (5) is coupled to an upper surface of the base panel plate (2);
• forming a second panel plate (4) located at one side of the base panel plate (2) and hinged thereto so as to be foldable, formed at one side surface thereof with a second flat surface (9) having a planar shape, to which the display panel (5) is coupled, and formed at the other side surface thereof with a second inclination surface (7) inclined in a diagonal direction;
• forming a first panel plate (3) located at the other side of the base panel plate (2) and hinged thereto so as to be foldable, formed at one side surface thereof with a first inclination surface (6) which is inclined in a diagonal direction and to which the display panel (5) is coupled, and formed at the other side surface thereof with a first flat surface (8) having a planar shape;
• folding the second panel plate (4) such that the second flat surface (9) is in close contact with the upper surface of the base panel plate (2) so that the second inclination surface is located on the base panel plate (2);
• and folding the first panel plate (3) on the second panel plate (4) so that the first inclination surface (6) is seated on the second inclination surface (7) and folded, wherein when the first panel plate (3) is unfolded, the first inclination surface (6) is horizontally located on an upper surface of the first panel plate (3), and when the second panel plate (4) is unfolded, the second flat surface (9) is horizontally located on an upper surface of the second panel plate (4) so that the display panel (5) is unfolded.