Projector screens are uniformly grey or white blank surfaces used with a projector for the projection of images for viewing purposes. They are used in conference rooms, movie and home theatres, auditoriums and other places where you might need to display still images, PowerPoint presentations or short films. The purpose of the screen is to maximise the light coming from the projector, and reflect and distribute it back to the audience with clarity and without any loss in quality.
Dedicated screens are available for use with slide, movie, overhead and digital projectors. There are flat and curved screens as well as front and back projection screens. These are made from hi-tech fabrics that allow the light to either diffuse or focus on them, while controlling the reflection to the viewer.
Depending upon the type of projector to be used, the dimensions of the presentation room and the ambient light, there are different kinds of projection screen fabrics available. Screens can be made out of fibreglass or thick vinyl. All these screens come with a black border for adding contrast to the image. In some places a blank white wall is used as a screen for projecting images. Screens can either be manual or the pull-down types. Screens are classified as the matte white diffusion screen, the Datalux reflective screen, the high power retro-reflective screen and the rear projection screen.
The matte white diffusion screen cloths are ideal for all applications in a controlled environment. Such screens allow for larger viewing areas while reflecting bright and lifelike images without any loss in quality of the image. Datalux reflective screen fabrics are chosen for applications that demand a wider viewing angle and a higher reflection value. These screens are compatible with ceiling mounted projectors, video and data projectors.
The high power retro-reflective screen fabrics are used with projectors that are placed on tabletops. These screens reflect the projected light back towards the projector. The rear reflection screens have images reflected on them through a mirror placed in the projection unit behind them. This system lets the image travel a longer distance and saves space in front of the screen. Such screens give a higher resolution image, better clarity and vivid colours, and maintain a slimmer profile that is ideal for homes and conference rooms. With the projector behind, no shadows are cast on the screen a person walks in front of the screen. Such screens are more expensive than the front projection types.
While selecting a screen, you must match the aspect ratio of the screen to that of the projector. A screen with an aspect ratio of 1:1 and 4:3 is ideal for viewing business presentations whereas screens with a 16:9 aspect ratio are suited to viewing DVD and widescreen broadcasts.
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