DLP and DMD . DLP projectors can produce 90 percent luminance uniformity, which means the image is nearly the same in brightness from center to corner. There is no hot spot in the center of the screen, Levi says. Some of these low-maintenance DLP projectors are capable of producing a billion different colors, while the typical LCD projector only offers 16.7 million colors. With rear projection, the projection system is located behind the screen, like a television.
Front projection means the system is in front of the screen, like a slide show.
Rear projection systems are less obtrusive than front projection systems. They often provide a better image because there is less light interference than with front projection systems. They do require having a projection room behind the screen, however. Randy Bishop is editorial resident for Your Church.