A projection screen is an installation consisting of a surface and a support structure used for displaying a projected

Image projector

An image projector is an optical device that projects an image onto a surface, commonly a projection screen.Most projectors creates an image by shining a light through a small transparent image, but some newer types of projectors can project the image directly, by using lasers...

 image

Image

An image is an artifact, for example a two-dimensional picture, that has a similar appearance to some subject—usually a physical object or a person.-Characteristics:...

 for the view of an audience. Projection screens may be permanently installed, as in a movie theater

Movie theater

A movie theater, cinema, movie house, picture theater, film theater is a venue, usually a building, for viewing motion pictures ....

; painted on the wall; or semi-permanent or mobile, as in a conference room

Office

An office is generally a room or other area in which people work, but may also denote a position within an organization with specific duties attached to it ; the latter is in fact an earlier usage, office as place originally referring to the location of one's duty. When used as an adjective, the...

 or other non-dedicated viewing space such as an outdoor movie screening (open air cinema). Uniformly white or grey screens are used almost exclusively as to avoid any discoloration to the image, while the most desired brightness of the screen depends on a number of variables, such as the ambient light

Low-key lighting

Low-key lighting is a style of lighting for photography, film or television. It is a necessary element in creating a chiaroscuro effect. Traditional photographic lighting, three-point lighting uses a key light, a fill light, and a back light for illumination...

 level and the luminous power of the image source.