| 摘要 |
PURPOSE: A complex optical sheet minimizes brightness degradation. CONSTITUTION: An adhesion layer (40) is overlapped with a support part (23) even though the adhesion layer is coated on a prism (21) which includes a prism part (22) and the support part. A damage of a prism top is minimized by the above structure. A complex optical sheet represents the damage degree of the prism top by the curvature radius of the prism by changing a brightness reduction ratio according to the damage degree of the prism top. The complex optical sheet predicts brightness degradation according to the roundness degree of the prism top. |
