US 12,443,083 B1
Optical film and preparation method therefor and application thereof
Rujing Zheng, Xianyang (CN); and Yanquan Chen, Xianyang (CN)
Assigned to SHAANXI JINGCAI MINGWEI TECHNOLOGY CO., LTD, Xianyang (CN)
Filed by SHAANXI JINGCAI MINGWEI TECHNOLOGY CO., LTD, Xianyang (CN)
Filed on Jun. 25, 2025, as Appl. No. 19/250,043.
Application 19/250,043 is a continuation of application No. PCT/CN2024/070576, filed on Jan. 4, 2024.
Claims priority of application No. 202310014099.X (CN), filed on Jan. 5, 2023.
Int. Cl. G02F 1/1333 (2006.01); C09K 19/20 (2006.01); C09K 19/30 (2006.01); C09K 19/58 (2006.01); G02B 1/12 (2006.01); G02F 1/13357 (2006.01); G02F 1/137 (2006.01)
CPC G02F 1/13718 (2013.01) [C09K 19/2007 (2013.01); C09K 19/3003 (2013.01); C09K 19/586 (2013.01); G02B 1/12 (2013.01); G02F 1/133603 (2013.01); C09K 2019/2078 (2013.01); C09K 2019/301 (2013.01); C09K 2219/03 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A preparation method for an optical film, comprising:
performing an alignment treatment on a first release film to obtain a carrier film;
unrolling the carrier film, coating a surface of the carrier film with a first liquid crystal mixture used for preparing a brightness enhancement film, then drying and ultraviolet irradiation curing to form the brightness enhancement film; and coating a surface of the brightness enhancement film with photosensitive monomers, and photo-crosslinking under linear polarization ultraviolet irradiation to form a cross-linked polymer film as an alignment layer;
coating the alignment layer with a second liquid crystal mixture used for preparing a phase retardation film, then drying and ultraviolet irradiation curing to form a liquid-crystal phase retardation film; and
combining a second release film on a side of the liquid-crystal phase retardation film and rolling, peeling off the first release film, applying an optically clear adhesive (OCA) onto the brightness enhancement film, and combining a third release film on a side of the OCA facing away from the brightness enhancement film and rolling.