You need to spend some time on avsforum, PG. LCD, DLP, and LCoS are all examples of digital imaging technology. LCD, or Liquid Crystal Display is a transmissive technology, just like LCoS, or Liquid Crystal on Silicon. This means light passes through a medium. DLP, or Digital Light Processing is a marketing name for DMD, or Digital Micromirror Device, which is a reflective technology--light is reflected of its mirrors.
None of these have anything to do with how a projected images is seen by your eyes, whether that be on a projection screen or on a fixed screen using a fresnel (sp) lens in rear-projection. Front projection vs. rear rpojection just means from what direction the imager is projecting the light from. And as DLP is a marketing name by TI for its DMD technology, D-ILA is JVC's marketing name for LCoS (Sony uses SXRD).