Folding screen

Imagine having a paper which you can fold from the middle. This paper is special because it has a screen on it, on which you can play your games or watch your favorite videos. You can fold the paper and make it smaller, and when you unfold it, the screen becomes bigger. Just like that, a folding screen is a kind of screen that you can fold in half, making it more compact and easier to carry around. But also, if you unfold the screen, it will become bigger and allow you to see more things on it. Just like your paper, except that it glows and shows you videos instead of just being a plain piece of paper.