A light splitting and synthesizing device includes: a polarized beam splitter for splitting a white light into two polarized light beams and for directing the polarized light beams toward different directions; at least one half wave plate for rotating the polarization direction of one of the...http://www.google.com.au/patents/US5729306?utm_source=gb-gplus-sharePatent US5729306 - Light splitting and synthesizing device and liquid crystal display apparatus including the same 
