| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce the cost of a display device by decreasing the number of components of a back light unit, thereby settling the cumbersomeness of an assembly process for the display device. <P>SOLUTION: A first optical sheet 13 constituting a back light unit 40 is jointed to a diffusing plate 4 by a composite adhesive layer 14. An adhesive layer 60 comprises a transparent film 6, a first adhesive layer 5 of which the transparent film 6 is formed on a such surface as faces the first optical sheet 13, and a second adhesive layer 7 of which the transparent film 6 is formed on such a surface as faces a diffusion plate 4. As the transparent film 6, glass whose, for example, total beam transmissivity (T.t.) is 84% or higher and a difference (Δn) in refractive index from an adhesive is 0.17 or smaller, otherwise a polymer film or sheet whose material is, for example, PC, acrylic, or PET is used. <P>COPYRIGHT: (C)2008,JPO&INPIT |
