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US09170458B2 Liquid crystal display device having an alignment film produced via polyamide acid ester and polyamide acid as precursors 有权
具有通过聚酰胺酸酯和聚酰胺酸作为前体制备的取向膜的液晶显示装置

Liquid crystal display device having an alignment film produced via polyamide acid ester and polyamide acid as precursors
Abstract:
A liquid crystal display device includes a TFT substrate having a first alignment film and an opposing substrate having a second alignment film with liquid crystals sandwiched therebetween. One of the first and second alignment films, comprises a first polyimide produced via polyamide acid ester containing cyclobutane as a precursor and a second polyimide produced via polyamide acid as a precursor. The polyamide acid has a higher polarity than that of the polyamide acid ester. The one of the first and second alignment films is responsive to photo-alignment. A first side of the one of the first and second alignment films is adjacent to the liquid crystals, and a second side thereof is closer to one of the TFT substrate and the counter substrate than the first side. The first side contains more of the first polyimide and less of the second polyimide than the second side.
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