US 12,332,508 B2
Light shielding member
Kosuke Marutani, Yamatokohriyama (JP); Takumi Kato, Yamatokohriyama (JP); Takashi Megumi, Yamatokohriyama (JP); Satoshi Yamaguchi, Yamatokohriyama (JP); and Koji Yamashita, Yamatokohriyama (JP)
Assigned to NITTA Corporation, Osaka (JP)
Appl. No. 17/765,701
Filed by NITTA Corporation, Osaka (JP)
PCT Filed Sep. 29, 2020, PCT No. PCT/JP2020/036863
§ 371(c)(1), (2) Date Mar. 31, 2022,
PCT Pub. No. WO2021/070673, PCT Pub. Date Apr. 15, 2021.
Claims priority of application No. 2019-185854 (JP), filed on Oct. 9, 2019.
Prior Publication US 2022/0404646 A1, Dec. 22, 2022
Int. Cl. G02F 1/01 (2006.01); C08F 220/18 (2006.01); G02F 1/00 (2006.01); G02F 1/03 (2006.01); G02F 1/13 (2006.01)
CPC G02F 1/009 (2013.01) [C08F 220/1818 (2020.02); G02F 1/0311 (2013.01); C08F 2500/34 (2021.01); G02F 1/132 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A light shielding member comprising
a first polarizing plate,
a second polarizing plate facing the first polarizing plate, and
a thermosensitive sheet interposed between the first polarizing plate and the second polarizing plate, wherein
the first polarizing plate and the second polarizing plate are positioned so that their respective transmission axes are different from each other,
the thermosensitive sheet comprises a side chain crystal polymer that crystallizes at a temperature lower than the melting point and exhibits fluidity at a temperature of the melting point or higher,
the side chain crystal polymer comprises (meth) acrylate having a straight-chain alkyl group with 16 or more carbon atoms as a monomer component, and
a polar monomer included in the monomer component at a ratio of 1-10% by weight which constitutes the side chain crystal polymer.