The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 06, 2025
Filed:
Jan. 27, 2021
Shinwha Intertek Corp, Chungcheongnam-do, KR;
Cheol Heung Ahn, Chungcheongnam-do, KR;
Do Hyoung Kim, Gyeonggi-do, KR;
Seok Min Kang, Chungcheongnam-do, KR;
Ka Young Son, Incheon, KR;
Min Tae Kim, Gyeonggi-do, KR;
Chang Min Han, Chungcheongnam-do, KR;
SHINWHA INTERTEK CORP, Chungcheongnam-do, KR;
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.