Lenovo Patents new tech for a smartphone which folds vertically

We are moving towards foldable smartphones, we already have some foldable smartphone devices launched like Galaxy Fold. Now putting a step ahead, Lenovo patented a smartphone which has verticle fold. The best thing about this phone is it has a really big hinge at the rear so you can choose the point from where the phone will be folded. So you can fold the smartphone in half or fold it completely. So you may want some part of screen visible or hide it completely.