| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an optical sheet that gives light with higher qualities compared to the prior arts, particularly that can improve brightness and/or suppress changes in colors in an organic electroluminescence light-emitting unit at a time of lighting the unit, when a screen thereof is viewed in an oblique direction.SOLUTION: An optical sheet (20) transmits light exiting from a laminate (10) including an organic electroluminescence light-emitting layer (14), and includes a first light-controlling layer (21) and a second light-controlling layer (23). In the first light-controlling layer, a high refractive index part (21b) and a low refractive index part (21a) are alternately arranged in a direction along a layer surface, and extend in a direction different from the arrangement direction, while having a predetermined cross-sectional shape. In the second light-controlling layer, a high refractive index part (23a) and a low refractive index part (23b) are arranged in a direction along the layer surface, the direction different from the arrangement direction of the high refractive index part and the low refractive index part of the first light-controlling layer, and extend in a direction different from the arrangement direction thereof, while having a predetermined cross-sectional shape.</p> |
