How do hd projectors work?

Question

What are three filter looking things behind the projector optics. Each has a elect. ribbon connector and if the projecting direction is north then the three things are east,south,west. They are colored with a blue,green,or red dot.

Answer 1

Here is a good description of how HD projectors work.

The "three filter looking things" are probably LCD panels but it will depend on the type of projector.