	US 12,234,401 B2
	Alignment film, display device, method for producing display device, liquid crystal alignment agent, and liquid crystal composition
Masanobu Mizusaki, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Appl. No. 17/781,338
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP)
PCT Filed Dec. 9, 2019, PCT No. PCT/JP2019/048128 § 371(c)(1), (2) Date May 31, 2022, PCT Pub. No. WO2021/117104, PCT Pub. Date Jun. 17, 2021.
Prior Publication US 2023/0046964 A1, Feb. 16, 2023
Int. Cl. C09K 19/12 (2006.01); C09K 19/20 (2006.01); C09K 19/32 (2006.01); G02F 1/1335 (2006.01); G02F 1/1337 (2006.01); H01L 27/32 (2006.01); H10K 59/12 (2023.01); H10K 59/38 (2023.01)

CPC C09K 19/12 (2013.01) [C09K 19/20 (2013.01); C09K 19/32 (2013.01); G02F 1/133541 (2021.01); G02F 1/133614 (2021.01); G02F 1/133723 (2013.01); G02F 1/133788 (2013.01); H10K 59/12 (2023.02); H10K 59/38 (2023.02); C09K 2019/122 (2013.01); C09K 2019/2035 (2013.01); H10K 59/1201 (2023.02)]

20 Claims

1. An alignment film for aligning liquid crystals, the alignment film comprising at least a copolymer of: a first monomer represented by the following general formula (1)

where X¹and X²each independently represent —H, —CH₃, or —C₂H₅, Z represents —O—, —S—, —NH—, —CO—, —COO—, —OCO—, or a direct bond, Y¹and Y²each independently represent —H, —F, —Cl, —Br, a linear, branched, or cyclic alkyl group having 1 to 6 carbon atoms, or a linear, branched, or cyclic alkyloxy having 1 to 6 carbon atoms, m represents an integer of 6 to 16, and n represents an integer of 8 to 24; and

at least one of a second monomer represented by the following general formula (2)

where R¹and R²each independently represent a hydrogen atom or a methyl group, and

a third monomer represented by the following general formula (3)

where R³and R⁴each independently represent a hydrogen atom or a methyl group.