| 摘要 |
PROBLEM TO BE SOLVED: To provide a back light device in the side edge system which is made light-weight while keeping a prescribed luminance of a light source surface. SOLUTION: A rectangular light transmission member 1, a light source 3 which is provided on the side face of this rectangular light transmission member 1 and makes light incident from the side face of the rectangular light transmission member, a light reflection plate 5 which is arranged at the rear of the rectangular light transmission member 1, and an optical film 6 which is arranged in the front of the rectangular light transmission member are provided. With respect to the rectangular light transmission member 1, plural light transmission plates 9 and 10 whose rear faces silk pattern faces 2a and 2b are formed on are so arranged that they face each other with a gap 11 between them. |
