A backlight apparatus for directing light toward a display panel and the resulting display device comprises a solid lightguide comprising opposite TIR surfaces, containing a desired pattern of light redirecting surface features located between the TIR surfaces and interrupting one of the TIR surfaces,...http://www.google.com.au/patents/US20080285307?utm_source=gb-gplus-sharePatent US20080285307 - LCD DISPLAYS WITH LIGHT REDIRECTION
