CRT uses phosphor based guns similiar to what a direct view tube TV would use, LCD projection projects light through a small LCD panel. Both project against the back of their screens so you can view the image.
There's plenty of info on both in the FAQs section...
http://www.avsforum.com/avs-vb/showt...hreadid=323602
There's plenty of info on both in the FAQs section...
http://www.avsforum.com/avs-vb/showt...hreadid=323602