Projectors throw an image on a screen enough that an optimal image is created. Projectors are used in a variety of situations for numerous different purposes. Projectors are used in classrooms for education, corporate boardrooms and training facilities, in personal home theatre set-ups and in bars, clubs and pubs. A projector is in short a device designed to take an image from a video source and project it onto a screen or other surface. Projectors are much in demand for their ability to project movies and television programs onto a screen much larger than even the biggest TV available. Projectors come in a variety of different shapes and sizes and are produced by many different companies. Projectors allow users to alter a variety of image features, including brightness, sharpness and color settings, in the same way a standard television would.