Point #1. You are responding to a post that is 5 months old.

Point #2. Your projectors STILL require 3D glasses, something the OP did not want. (by my interpretation of his requirements) Or. at the very least, completely impractical for a large audience in terms of cost.

Point #3. You are advertising and that is not allowed on this forum.

Quote (dengbo on May 27, 2011 10:32 PM): light can be changed to polarized light by PBS. now there are polarized 3D projector in market. you can read to know how to work. Wish it can help you! http://www.aliexpress.com/fm-store/206255