A recently published patent filed by Microsoft describes in detail the hinge mechanism supporting a pop-up dual-surfaced foldable display. The patent also hints towards edge display notifications.
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Hinge mechanism RSS
New APIs added in the latest build released to Insiders show Microsoft is adding features enabling its OS to run on devices featuring 360-degree rotation, the most likely candidate being Andromeda.
A new patent filed by Microsoft has been published recently. This gives people a closer look at the hinge mechanism for the company's allegedly upcoming dual-display Andromeda device.