| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical sheet which can be thinned, and a backlight unit for display and a display device which can be thinned. <P>SOLUTION: The optical sheet 38 is constituted of a light-diffusible base material 39, a lens part 45, a film 60, and a reflection layer 47. The lens part 45 is constituted of a convex cylindrical lens group or a semi-spherical convex lens group. The film 60 is bonded to the surface in such a thickness direction that the light-diffusible base material 39 faces an image display element and is formed of a material having a water absorption rate lower than that of a material constituting the light-diffusible base material 39. The reflection layer 47 is constituted of light reflection parts 48 each provided to a region including a light non-convergence surface by the lens part 45 and light transmission parts (opening parts) 46 each provided to the vicinity of the focal point surface of each lens 44. <P>COPYRIGHT: (C)2008,JPO&INPIT |
