| 摘要 |
An optical film includes a supporting layer and a structured-surface layer having a plurality of prims juxtapositionally formed on the supporting layer, each prim including a lower prism element bonded with the supporting layer and at least one upper prism element integrally superimposed on the lower prism element to increase the prism height in order to pick up sideward refracted light to reduce light loss in order to enhance brightness of the optical film.
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