LED backlight designs with the flow-line method

Dejan Grabovičkić, Pablo Benítez, Juan C. Miñano, Julio Chaves
2011 Optics Express  
An LED backlight has been designed using the flow-line design method. This method allows a very efficient control of the light extraction. The light is confined inside the guide by total internal reflection, being extracted only by specially calculated surfaces: the ejectors. Backlight designs presented here have a total optical efficiency of up to 80% (including Fresnel and absorption losses) with an FWHM below 30 degrees. The experimental results of the first prototype are shown.
doi:10.1364/oe.20.000a62 pmid:22379668 fatcat:tidenwbkurbktitjyaeugqig64