By: Wally Dalziel
Most people do not put enough thought into the screen purchase when putting together a projection package. The size, shape and screen surface are some of the items that need to be considered. One of the most important decisions in screen selection is to determine the correct size of screen based upon:
* The dimensions of the audience area
In some situations, these two questions yield the same answer; in others, they do not and compromises must be made. Here are the key considerations:
For 4:3 moving video and entertainment, screen height should be at least 1/6 the distance from the screen to the furthest seat; for charts and data, as in a conference or lecture room, use 1/4; for complex graphics, as in a command/control center, use 1/2.
For 16:9, 1.85:1, or 2.35:1 projection, screen height should equal or exceed 1/3 the distance from the screen to the optimum seat.
Matte White is the most versatile screen surface and the premier choice when ambient light is controllable. It evenly distributes light over a wide viewing area while colors remain bright and life-like, with no shifts in hue.
High Contrast Matte White, designed for moderate output DLP and LCD projectors, is a great choice when video images are the main source of information being projected and where ambient light is moderately controlled.
A Glass Beaded surface has the ability to achieve a higher gain by reflecting more of the projected image back along the projection axis. Glass beads impregnated into the screen's surface provide additional reflectance. This attribute creates an unparalleled screen surface that reproduces vibrant life-like color at moderate viewing angles.
Wally Dalziel is the owner of www.ChurchProjectors.com.