Folding portable display device

A folding device comprising:

• a hinge assembly defining a first axis and a second axis;
• a first assembly comprising a first hinge arm that includes a first shaft rotatably connected to the hinge assembly about the first axis;
• a second assembly comprising a second hinge arm that includes a second shaft rotatably connected to the hinge assembly about the second axis;
• a first gear mounted on the first shaft;
• a second gear mounted on the second shaft, wherein the first gear is configured to mesh with the second gear to synchronize movement of the first assembly and the second assembly;
• a first disk spring mounted on the first shaft;
• a second disk spring mounted on the second shaft, wherein the first disk spring and the second disk spring are collectively configured to increase an amount of force needed to rotate the first assembly and the second assembly, wherein:
• an outer surface of the first disk spring engages an inner surface of the first gear;
• an inner surface of the first disk spring engages an outer surface of the first shaft;
• an outer surface of the second disk spring engages an inner surface of the second gear;
• and
• an inner surface of the second disk spring engages an outer surface of the second shaft;
• and
• a continuous display spanning an inner surface of the first assembly and an inner surface of the second assembly.