OPTICAL SHEET AND SURFACE LIGHT SOURCE FOR LIQUID CRYSTAL DISPLAY DEVICE

摘要

An optical sheet containing a three-layer laminate resin sheet which is composed of a core layer and outer layers which are arranged on both sides of the core layer without having adhesive layers therebetween.  The core layer is composed of an amorphous resin, and at least one of the outer layers is provided with a plurality of projections in the surface.  The resins constituting the outer layers are mainly composed of resins having the same composition, and each has a glass transition temperature not less than 80°C and lower than the glass transition temperature of the resin constituting the core layer by 10°C or more.