| 摘要 |
PROBLEM TO BE SOLVED: To provide a sheet-like light source device by which the constituting number of members is reduced and whose cost is reduced with high efficiency and handling performance is improved by integrally manufacturing a diffusing plate provided on an image screen of the sheet-like light source device together with a transparent resin base board. SOLUTION: In order to eliminate a conventional diffusing plate, a transparent material 11 in which light scattering particles 12 are mixed is formed on a transparent resin base board 1 as a light diffusing layer 13. And an integral base board 14 is formed. In order to set a surface of an image screen being a characteristic of a sheet-like light source device in uniform high brightness, the light diffusing layer 13 is composed of a member having a refractive index lower than the transparent resin base board 1. |
