| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical sheet and a back light unit for display, which do not cause distortion or deflection in the sheet when the sheet is wound in a manufacturing process of the optical sheet and are advantageous for providing a clear display image, when improving the optical sheet having a function of converging or uniforming light from a light source. <P>SOLUTION: In the optical sheet 100, an optical element 80 is disposed on an emission surface side of a substrate sheet 81. When a lens is used for the optical element 80, a stripe-like light reflection layer 86 may be disposed on an incident surface 104B side. When the light reflection layer 86 is not disposed, the incident surface 104B becomes a plane on the backside of the substrate sheet 81. When the light reflection layer 86 is disposed, the incident surface 104B becomes a substantial plane on the light reflection layer 86. The coefficient of static friction when a surface 104A of the optical element 80 comes into contact with the incident surface 104B is set at ≥0 and ≤3.0. <P>COPYRIGHT: (C)2009,JPO&INPIT |
