Hinge structure for foldable device having flexible display panel

1. A hinge structure for a foldable device having a flexible display panel, the hinge structure comprising:

a first device;

a second device;

a hinge housing having a U-shaped section, with a space being defined therein, and configured such that first ends of the first device and the second device are rotatably coupled to both ends of the hinge housing by hinge shafts, respectively; and

a flexible display panel configured such that a first fixing part on a first side and a second fixing part on a second side, except for a bending part that is a part of a central portion, are fixed to upper surfaces of the first device and the second device, respectively,

whereby, when the first device and the second device are unfolded, the flexible display panel is unfolded to be flat over the first device and the second device, and, when the first device and the second device are folded, the bending part of the flexible display panel is folded such that the first fixing part and the second fixing part are parallel to each other, and the bending part is accommodated in the space of the hinge housing while maintaining a curvature.

2. The hinge structure of claim 1 , wherein the separate connecting parts protrude from central portions in a widthwise direction of the first ends of the first device and the second device, respectively, and the connecting parts are rotatably connected to the hinge shafts.

3. The hinge structure of claim 1 , wherein the hinge shafts are provided on both lines each forming an angle of 45 degrees with a central portion in a widthwise direction of the flexible display panel, when the first device and the second device are horizontally unfolded.

4. The hinge structure of claim 2 , wherein upper support parts protrude from upper portions of first ends of the first device and the second device, support members that are flat on tops thereof are rotatably connected at first ends thereof to the upper support parts via the hinge shafts, respectively,

whereby, when the first device and the second device are unfolded, an upper end of a sidewall of the hinge housing supports a lower surface of each of the support members, and

when the first device and the second device are folded, the support members are rotated to be accommodated in the space.

5. The hinge structure of claim 4 , wherein guide parts having curved inner sidewalls are formed on both sidewalls of the hinge housing so that there are narrow in upper sections and are widened in a direction from an upper position to a lower position, so, when the first device and the second device are folded, lower surfaces of the support members slide along the curved surfaces of the guide parts to be folded.

6. The hinge structure of claim 4 , wherein lower support parts protrude from lower portions of the first device and the second device,

a lower portion of an outside of the sidewall of the hinge housing is recessed to form step parts,

whereby, when the first device and the second device are unfolded, ends of the lower support parts are supported by the step parts formed on the lower portion of the sidewall of the hinge housing, thus keeping the flexible display panel flat without exceeding 180 degrees.

7. The hinge structure of claim 4 , wherein cover parts each protruding in a curved shape are formed on the lower portion of the sidewall of the hinge housing, and outer surfaces of the cover parts are in contact with inner surfaces of the lower support parts, so, when the first and second devices are folded, the cover parts slide to eliminate a gap and thereby prevent inflow of impurities.

8. The hinge structure of claim 1 , wherein gears are provided on the connecting parts, located outside the flexible display panel in a plan view at both ends in a longitudinal direction of the hinge housing so that the gears do not rotate, and

intermediate gears are provided between the gears to rotatably engage with the gears, so, when the first device and the second device are rotated, the intermediate gears allow the first gear of the first device to be simultaneously rotated at the same angle.