Projection screens are used to display images from overhead and video projectors. Projection screens include fixed frame screens, portable and folding screens, electric screens, rear projection, and manual wall and ceiling screens. A projection screen is used frequently in corporate and classroom settings and can function with an overhead or slide projection system, or as a video projection screen.
Projection screens can be mounted and fixed in many different configurations depending on the frequency of use and the type of room used for presentations. Manual projection screens are usually mounted on a wall or ceiling and are unrolled and secured for occasional use. Manual screens are made of either a woven and laminated textile base or a reflective, tensioned vinyl. An electric projection screen can be concealed in the ceiling or floor and moved into position for presentations. A motorized projection screen can also be mounted on the wall and may even include a light-blocking window shade in the same unit. Portable projection screens come in several configurations, including folding screens and tripod screens. A portable projection screen with a tripod can be set up quickly in many settings, and can be quickly disassembled.
Projection screens are usually divided into either front or rear projection types. A front projection screen is the type used with slide, overhead, and video projectors that are situated at the back of a room or are suspended in the ceiling. A rear projection screen is a special projection system that uses projectors and mirrors situated directly behind the screen. Rear projection screens come in a variety of configurations, including transparent holographic screens and framed screen systems where the various projection components such as mirrors and projectors are locked in configuration to ensure a clear image.