1. Projection technology
--- The most popular projection technology are DLP & LCOS
2. The advantage of LCOS projection
--- Better price performance and better color saturation performance
3. What is short throw projection
--- Shorten projection distance to get longer projection size
4. What is offset
--- The offset measures the position of the image relative to the center-line of the lens. For example in a projector with a 0 percent offset, the center of the image lines up perfectly with the center of the lens, assuming that the projector is pointed straight at the screen.