公开(公告)号：US12292588B2

公开(公告)日：2025-05-06

申请号：US17798887

申请日：2021-01-27

Applicant: SHINWHA INTERTEK CORP

Inventor： Cheol Heung Ahn ,  Do Hyoung Kim ,  Seok Min Kang ,  Ka Young Son ,  Min Tae Kim ,  Chang Min Han

IPC: G02B5/30 ,  G02B1/14

Abstract: An optical sheet and a method for manufacturing the optical sheet are provided. The optical sheet comprises: a first substrate; a first resin layer disposed on one surface of the substrate; a second resin layer disposed on one surface of the first resin layer; and a third resin layer disposed on one surface of the second resin layer, wherein the first resin layer includes a first one-surface corrugated portion formed on one surface thereof and having a plurality of convex portions and concave portions, the second resin layer includes a second other-surface corrugated portion formed on the other surface thereof and having a pattern shape complementary to that of the first one-surface corrugated portion, the second resin layer includes a second one-surface corrugated portion formed on one surface thereof, having a plurality of convex portions and concave portions and having a surface roughness value greater than that of the first one-surface corrugated portion, and the third resin layer has a third other-surface corrugated portion formed on the other surface thereof and having a pattern shape complementary to that of the second one-surface corrugated portion.