Abstract: The present invention provides an optical film comprising a substrate having a first optical surface and a second surface and a micro structure layer on the first optical surface of the substrate, wherein the micro structure layer comprises a plurality of first light-adjusting structures selected from the group consisting of prism columnar structures, conical columnar structures, solid angle structures and orange-segment like structures and a combination thereof and a plurality of second light-adjusting structures selected from the group consisting of arc columnar structures, lens-like structures, and capsule-like structures and a combination thereof, wherein at least a portion of the second light-adjusting structures has a height greater than those of all the first light-adjusting structures. The optical film of the present invention will not suffer the damage caused on the microstructure layers while achieving a light-gathering effect and effectively reducing optical interference.

Abstract: The present invention pertains to an optical film comprising a substrate and a microstructured layer on a surface of the substrate, wherein the microstructured layer comprises a plurality of columnar structures and the columnar structures comprise at least two members selected from the group consisting of a linear columnar structure with its height varying along the length direction, a linear columnar structure without its height varying along the length direction, a serpentine columnar structure with its height varying along the length direction, and a serpentine columnar structure without its height varying along the length direction. The optical film of the present invention enhances the brightness and efficiently reduces optical interference.

Abstract: The present invention provides an optical film comprising a substrate having a first optical surface and a second surface and a microstructure layer on the first optical surface of the substrate, wherein the microstructure layer comprises a plurality of first light-adjusting structures selected from the group consisting of prism columnar structures, conical columnar structures, solid angle structures and orange-segment like structures and a combination thereof and a plurality of second light-adjusting structures selected from the group consisting of arc columnar structures, lens-like structures, and capsule-like structures and a combination thereof, wherein at least a portion of the second light-adjusting structures has a height greater than those of all the first light-adjusting structures. The optical film of the present invention will not suffer the damage caused on the microstructure layers while achieving a light-gathering effect and effectively reducing optical interference.