LIGHT GUIDE BODY, SURFACE LIGHT SOURCE DEVICE USING LIGHT GUIDE BODY AND LIQUID CRYSTAL DISPLAY

摘要

PROBLEM TO BE SOLVED: To provide an inexpensive light guide body having a high optical efficiency, a simple structure and superior assembling property, and to provide a surface light source device using the light guide body, and a liquid crystal display. SOLUTION: The light guide body 21 used for the surface light source device and adopting one surface as a light emitting face is provided with a light taking- out mechanism 290 for selectively emitting illuminating light to a face 21c opposed to the light emitting face 21b and the emitting direction selection rates of respective places in the light emitting face 21b are almost fixed.