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.