Synchronized hinges for foldable displays
Embodiments of synchronized hinges for foldable displays are described. In some embodiments, a hinge may include: a first bracket coupled to a first shaft via a first arm, a second bracket coupled to a second shaft via a second arm, and a synchronization bracket coupled to the first and second shafts.
1. A hinge, comprising:
a first bracket coupled to a first shaft via a first arm;
a second bracket coupled to a second shaft via a second arm; and
a synchronization bracket coupled to the first and second shafts, wherein the first shaft is disposed along a first axis, wherein the second shaft is disposed along a second axis parallel to the first axis, wherein the first and second brackets are configured to rotate around a center axis between the first and second axes, and wherein the synchronization bracket comprises at least one first pin coupled to at least one first slot in the first shaft and at least one second pin coupled to at least one second slot in the second shaft.
2. The hinge of claim 1 , wherein rotation of the first bracket around the center axis causes: rotation of the first shaft around the first axis, translation of the synchronization bracket with respect to the first and second brackets, rotation of the second bracket around the second axis, and rotation of the second bracket around the center axis.
3. The hinge of claim 2 , wherein a first amount of rotation of the first bracket around the center axis is equal to a second amount of rotation of the second bracket around the center axis.
4. The hinge of claim 1 , further comprising a middle housing between the first and second brackets, wherein the first and second brackets each comprise a semi-circular lip coupled to a corresponding semi-circular slot on each side of the middle housing.
5. The hinge of claim 4 , wherein the middle housing is configured to restrict a maximum angle of rotation between the first and second brackets.
6. The hinge of claim 1 , wherein the first arm is slidably coupled to a longitudinal slot of a lateral surface of the first bracket, and wherein the second arm is slidably coupled to a longitudinal slot of a lateral surface of the second bracket.
7. The hinge of claim 1 , wherein the first arm is keyed to the first shaft, and wherein the second arm is keyed to the second shaft.
8. The hinge of claim 1 , wherein the at least one first pin engages with a first entrance of the at least one first slot and the at least one second pin engages with a second entrance of the at least one second slot in response to a straight angle between the first and second brackets.
9. The hinge of claim 1 , wherein the at least one first pin engages with a first end of the at least one first slot and the at least one second pin engages with a second end of the at least one second slot in response to a zero angle between the first and second brackets.
10. The hinge of claim 1 , wherein the at least one first slot at least partially spirals around a first surface of the first shaft, and wherein the at least one second slot at least partially spirals around the second shaft.
11. The hinge of claim 1 , further comprising a torque module coupled to the first and second shafts.
12. The hinge of claim 1 , further comprising:
a third arm coupled to the first bracket and to a first torque shaft;
a fourth arm coupled to the second bracket and to a second torque shaft; and
a torque module coupled to the first and second torque shafts.
13. The hinge of claim 1 , wherein the synchronization bracket comprises a spur gear.
14. The hinge of claim 1 , wherein the synchronization bracket comprises a bevel gear.
15. The hinge of claim 1 , wherein the synchronization bracket comprises an internal thread configured to be coupled to a leadscrew.
16. The hinge of claim 1 , wherein the synchronization bracket comprises a worm gear.
17. An Information Handling System (IHS), comprising:
a flexible display; and
a hinge coupled to the flexible display, the hinge comprising:
a first bracket coupled to a first shaft via a first arm;
a second bracket coupled to a second shaft via a second arm; and
a synchronization bracket coupled to the first and second shafts, wherein the first shaft is disposed along a first axis, wherein the second shaft is disposed along a second axis parallel to the first axis, wherein the first and second brackets are configured to rotate around a center axis between the first and second axes, and wherein the synchronization bracket comprises at least one first pin coupled to at least one first slot in the first shaft and at least one second pin coupled to at least one second slot in the second shaft.
18. The IHS of claim 17 , wherein the hinge further comprises a middle housing between the first and second brackets, wherein the first and second brackets each comprise a semi-circular lip coupled to a corresponding semi-circular slot on each side of the middle housing.
19. A method, comprising:
providing a hinge; and
rotating a first bracket of the hinge around a center axis, wherein the rotation of the first bracket synchronously rotates a second bracket around the center axis, at least in part, by:
rotating a first shaft around a first axis parallel to the center axis via a first arm coupled to a longitudinal slot of a lateral surface of the first bracket;
translating a synchronization bracket with respect to the first and second brackets, wherein the synchronization bracket comprises at least one first pin coupled to at least one first slot in the first shaft, and at least one second pin coupled to at least one second slot in a second shaft; and
rotating the second shaft around a second axis parallel to the center axis via a second arm coupled to a longitudinal slot of a lateral surface of the second bracket.
20. The method of claim 19 , wherein a first amount of rotation of the first bracket of the hinge around the center axis is equal to a second amount of rotation of the second bracket around the center axis.