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US 8,576,362 B2Granted
Liquid crystal display device and polymer for alignment film materials
AssigneeSharp Kabushiki Kaisha
InventorsShinichi Terashita, Isamu Miyake, Koichi Miyachi, Yuko Teraoka
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Abstract
A liquid crystal display device suppresses generation of image sticking in AC mode. A liquid crystal display device comprises an alignment film arranged on at least one of a pair of substrates. The alignment film comprises a polymer containing a first constitutional unit and a second constitutional unit. The first constitutional unit controls alignment of the liquid crystal molecules by photoirradiation. The second constitutional unit controls alignment of the liquid crystal molecules regardless of photoirradiation.
Claims6
A liquid crystal display device comprising:
- a pair of substrates;
- a liquid crystal layer comprising liquid crystal molecules;
- and
- an alignment film,
- the liquid crystal layer being interposed between the pair of substrates,
- the alignment film being arranged on a liquid crystal layer side-surface of at least one of the pair of substrates,
- wherein the alignment film is obtainable by providing a film with an alignment treatment by photoirradiation,
- the alignment film being formed from an alignment film material, the alignment film material including a copolymer containing a first constitutional unit and a second constitutional unit,
- wherein a structure of the first constitutional unit is different than a structure of the second constitutional unit before and after the photoirradiation;
- the first constitutional unit exhibiting a property of controlling alignment of the liquid crystal molecules by photoirradiation, and
- the second constitutional unit exhibiting the property of controlling alignment of the liquid crystal molecules regardless of photoirradiation.
8 more elements
Dependencies are inferred from the claim text.