Microsoft could be working on a phone which takes the Surface Duo (pictured above) concept a little further, adding a third screen into the mix – although that extra display will be a very small affair which is present on the hinge of the device.

This potential new piece of hardware is documented in a patent filed by Microsoft which was spotted at Free Patents Online [PDF] (by Windows Latest), which describes a device having a ‘screen region’ on the hinge.

So, as mentioned, the basic concept is a dual-screen device which folds via a hinge mechanism, with the third display on the hinge, being capable of displaying all sorts of information depending on the state of the device.
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