LG is currently said to have a next-gen phone in the works called Project B. It is rumored to have a rolling display, which means its screen can extend beyond the confines of its frame. Now, a new patent application submitted to the US Patents and Trademarks Office (USPTO) may show how this concept is supposed to work in a real-world device.
https://www.notebookcheck.net/LG-s-Project-B-rollable-phone-may-have-surfaced-in-a-leaked-patent-document.501805.0.html