Patent ID: 11921374
Assignee: CHANGKANG CHEMICAL CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 12:
13. An optical film comprising:
a first sheet having a first pattern layer including a plurality of pyramid patterns formed on one entire side of a first base and a second pattern layer consisting of a plurality of adhesive irregular protrusion portions forming a different pattern from the plurality of pyramid patterns and irregularly disposed on the other entire side of the first base,
a second sheet having a third pattern layer including a plurality of pyramid patterns formed on one entire side of a second base and a fourth pattern layer corresponding to the second pattern layer and formed on the other entire side of the second base,
wherein the fourth pattern layer include a plurality of irregular protrusion portions, and
wherein the first sheet and the second sheet are laminated by the plurality of adhesive irregular protrusion portions of the second pattern layer.