Whiteboard projection screens are used frequently in schools, offices, and even in homes. Many people, however, don't take time to learn the disadvantages of whiteboard projection screens as compared with other options.
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Projections can be Obscured
Projections can be obscured by people sitting in front of the projection source. Direct presentation screens, although more expensive, feed the presentation directly from the source-such as a laptop or desktop computer-into the screen, with no projection required.
Whiteboard projection screens require a lot of storage space or take up a lot of wall space if mounted on a wall. Pull-down projection screens, which mount in an extremely small space on the wall, take a lot less storage space.
Sizing Issues and Setup
Fixed-size screens that don't roll down from a wall often don't match up to the height of the projection. They are frequently too high or too short, and the projection source has to be adjusted to accommodate the screen. Pull-down screens can be mounted high on the wall and can be sized big enough to pull all the way to the floor, saving time when setting up the projection.
Damage to the Screen
If a whiteboard projection screen is set up permanently, people can be tempted to draw on it, particularly in a school setting with young children. Drawings done in many types of ink are extremely difficult to clean off. Roll-down screens can be set at a height that limits access.
Many health officials have protested the use of whiteboard projection screens in schools, claiming that the projection beam can damage students' retinas. Some students and teachers have reported feeling dizzy or dazed after looking at the projection beam or board. Direct presentation screens, which don't require a projector, minimise the potential danger.
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