Light guiding body, light reflective sheet, surface light source device and liquid crystal display device using the light reflective sheet, and method of manufacturing the light reflective sheet

摘要

A surface light source device 21 includes a light guide 21, condensing elements 240 provided on a light emitting surface 21b of the light guide 21, a light reflective sheet 27 provided on a surface 21c opposite the light emitting surface 21b. The reflective sheet 27 includes substantially identically and/or substantially analogously shaped base units 28 having inclined light reflecting surfaces and arranged with a pitch not exceeding 5000 micrometers. A light source 22 is provided along one side 21a of the light guide 21. The light guide 21 includes a light takeout mechanism 290 for selectively emitting light beams through the surface 21c opposite the light emitting surface 21b.