A double sided screen is a projection screen that can produce images on both sides of the screen, using either one or two projectors. It can be used to create an immersive and interactive environment for the viewers, or to display different information or messages on each side of the screen. For example, you can use a double sided screen to create a virtual reality or an augmented reality experience, where the viewers can see different scenes or objects on each side of the screen, or interact with the projected images using gestures or voice commands. A double sided screen can also be used to create a bi-directional or multi-directional communication, where the viewers can communicate with each other or with the content on both sides of the screen.