December 29 news, according to foreign media reports, Microsoft a patent for a tri-fold folding screen was exposed, which showed the concept of Surface Duo, which is expected to be applied to future triple-fold screen mobile phones.

Recent folding screen mobile phone can not be described as not hot, OPPO, Huawei and other mobile phone manufacturers have released their own folding screen mobile phones, Microsoft also came up with their own folding screen mobile phones, from this patent point of view may want to directly out of the tri-fold folding screen mobile phone.
The patent itself details hinge degrees, parallel axes, elongated magnets, magnetic shields, Hall-effect sensors, etc., and comes with pictures, from the appearance, Microsoft hopes to add a 2/3 size display that can be used as a multi-function screen. It was mentioned that the screen acts as a keyboard, trackpad, or game controller in different use cases, however, its most useful feature may simply be an outward-facing screen, similar to the new hotspot of the Samsung Galaxy Fold.
Microsoft's patents have been visualized by the props team for the HBO show Westworld, and microsoft's version will be very similar to it, except for the aspect ratio.
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