The display would cover the entire surface of the devices and could include two AMOLED screens one on top of the other, according to a patent filing published this week, allowing it to give "an illusion of depth perception... mimicking a 3D experience".

“The majority of portable electronic device manufacturers utilize a common form factor consisting generally of a flat planar form factor with a single surface dedicated mainly for use as a display surface, while the other surfaces remain largely unused, save for the occasional button or switch,” the patent filing explains.

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