After the Note 4 Edge and S6 edge, Samsung popularized the curved screen on its flagship, which has become the biggest product appearance change of Samsung in recent years. Later, the curved full screen and iPhone X special-shaped full screen, which everyone has been accustomed to, were also amazing, but they were just trying to make the front of the phone become a screen, and sooner or later they would encounter a bottleneck in area.

In order to continue to increase the screen area of mobile phones, only folding screen or projection can be used. Everyone is waiting for Samsung, the largest mobile OLED screen manufacturer, when to offer available folding screen phones. The rumored Galaxy X has been continuously exposed as early as 2016. It is expected that this science fiction device will be released as soon as March 2018.

On December 23, it was reported that Samsung's application submitted in August 2017 was exposed in the patent application document, among which there are three hinge designs that may eventually be applied to the Galaxy X:

The purpose of the first kind of folding mechanism is to minimize the screen bending at the folding position and increase the bending space. In the process of folding, this mechanism can narrow the horizontal width of the screen inside the body, squeeze part of the length into a large arc, and prevent the screen from local excessive bending.

The second and third mechanisms are similar to the snap hinges on the Microsoft Surface Book. After simply and roughly folding the screen, a gap is left at the fold. The third mechanism also shows that the power and volume buttons of the folding device are on the right, but the power button is placed very low to avoid the folding mechanism.

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