Patent ID: 8523419
Filing Date: 2013-09-03
Classification: F21V,G02B,G02F

Abstract:
1. An edge-lit backlight, comprising: a front and back reflector forming a hollow light recycling cavity having a cavity depth H and an output region of area Aout; and one or more light sources disposed proximate a periphery of the backlight to emit light into the light recycling cavity, the light sources having an average plan view source separation of SEP and collectively having an active emitting area Aemit; wherein a first parameter equals Aemit/Aout; wherein a second parameter equals SEP/H; wherein the backlight is characterized by the first parameter being in a range from 0.0001 to 0.1, and by the second parameter being in a range from 3 to 10; and wherein the front reflector has a hemispherical reflectivity for unpolarized visible light of R