Liquid crystal alignment agent, liquid crystal alignment film, and liquid crystal display element using liquid crystal alignment film

To provide a liquid crystal alignment agent that makes it possible to form a liquid crystal alignment film that gives a liquid crystal display element that has favorable viewing angle characteristics and afterimage characteristics. A liquid crystal alignment agent that contains a polymer that is the...

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Hauptverfasser: IWATA, TAKASHI, TAJIRI, TONAMI
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:To provide a liquid crystal alignment agent that makes it possible to form a liquid crystal alignment film that gives a liquid crystal display element that has favorable viewing angle characteristics and afterimage characteristics. A liquid crystal alignment agent that contains a polymer that is the product of reacting starting materials that include a tetracarboxylic acid dianhydride and a diamine. The starting materials used to synthesize the polymer include at least one compound selected from compounds represented by formulas (1)-(3) and also include compounds represented by formulas (A)-(C) and at least one compound selected from compounds represented by formula (D), provided that, when m in formula (1) is 8, no compound represented by formulas (A)-(C) need be included in the diamine, and the tetracarboxylic acid dianhydride need not be a compound represented by formula (D).