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:
Jan. 06, 2015
Filed:
Sep. 27, 2012
Skc Haas Display Films Co., Ltd., Chungchongnam-Do, KR;
Myung Duck Suh, Chungcheongnam-do, KR;
Hyun Doo Lee, Chungcheongnam-do, KR;
Sang Hun Lee, Chungcheongbuk-do, KR;
Kyoung-IL Lee, Chungcheongnam-do, KR;
Jong Sun Yoon, Chungcheongnam-do, KR;
Abstract
The present invention relates to a method for preparing an optical sheet comprising the steps of: (a) preparing a transfer film having a single roughened side by coating one side of a first substrate with resin component comprising 100 parts by weight of binder resin and 70 to 130 parts by weight of spherical organic polymer beads, followed by drying; (b) laminating the transfer film preparing in step (a) with an ultraviolet-curable (UV-curable) resin-coated layer, which prepared by coating one side of a second substrate with UV-curable resin, such that the roughened side of the transfer film is facing the UV-curable resin-coated side of the second substrate; and (c) forming a roughened diffusive layer on the single-side of the second substrate having refractive index of 1.41 to 1.59 by curing the laminate obtained in step (b), followed by separating and removing the transfer film, wherein the roughened side of the transfer film has a segment angle of 130 to 150°. The optical sheet prepared by the method of the present invention has high brightness, which can also provide masking of prism sheet pattern, and is safe from surface stains and interface scratches between the sheet and the polarizing plate positioned underneath, thus, can be used as an optical sheet in backlight unit of LCD.