ILLUMINATOR AND LIQUID CRYSTAL DISPLAY COMPRISING THE ILLUMINATOR

摘要

An illuminator requiring no prism sheet and having a high light efficiency and a liquid crystal display comprising the same. The illuminator has groups of grooves (2), each group including one or more grooves made in the lower face (9) of a light guide (1) and extending generally parallel to one side (10) of the light guide (1) on which a light source (3) is disposed. The depth h of the grooves gradually increases from the one side (10) toward the other side. Between the adjacent groups (2) of grooves, a flat face (16) is so provided in the lower face of the light guide (1) as to connect the groups (2), enhancing the light efficiency of the illuminator.